Clamping device and grinding equipment

Abstract

The utility model relates to a clamping device, which is used for clamping a grinding device and comprises a fixing component, a clamping component, a clamping component and a driving component, and the fixing component is provided with a rotatable connecting end and is used for being connected with a to-be-ground steel pipe; one end of the bracket is connected with the connecting end, so that the bracket can rotate along with the connecting end; the first clamping part is arranged on the bracket and is used for clamping the front part of the grinding device; the second clamping component is arranged on the bracket; the third clamping part is connected with the second clamping part and provided with a clamping space with the adjustable size, and the clamping space is used for allowing the rear portion of the grinding device to be placed in so that the grinding device can be clamped through the third clamping part; the handle is arranged on the bracket, the first clamping part or the second clamping part; and under the condition that the grinding part is clamped by the first clamping part and the second clamping part, a grinding piece of the grinding part is located on the side, away from the support, of the grinding part.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe processing, in particular to a clamping device and a grinding device. BACKGROUND

[0002] In order to ensure the welding quality of the pipe, non-destructive testing is usually performed after welding. When using ultrasonic waves to detect the butt weld of the steel pipe and the pipe fitting, the ultrasonic probe can only be scanned from the side of the steel pipe. According to the latest standard specification, when the ultrasonic wave scans the weld from one side, the weld reinforcement needs to be ground flat. At present, the pipe is mainly ground flat by manually holding a grinding device. When the weld is polished flat by manually holding an angle grinder, the hand and arm are in a long-term vibrating state, which can easily cause damage to the operator's hand or arm. CONTENT OF THE UTILITY MODEL

[0003] In order to solve or partially solve the problems in the related art, the present application provides a clamping device and a grinding device, which can solve the technical problem that the hand and arm are in a long-term vibrating state when the weld is polished flat by manually holding an angle grinder, which can easily cause damage to the operator's hand or arm.

[0004] The first aspect of the present application provides a clamping device for clamping a grinding device, comprising:

[0005] A fixed component having a rotatable connecting end, the fixed component being used to connect with a steel pipe to be ground flat;

[0006] A support connected to one end of the connecting end, so that the support can rotate with the connecting end;

[0007] A first clamping component provided on the support, used to clamp the front part of the grinding device;

[0008] A second clamping component provided on the support;

[0009] A third clamping component connected to the second clamping component, having a clamping space with adjustable size, the clamping space being used to put the rear part of the grinding device, so as to clamp the grinding device by the third clamping component; and

[0010] A handle provided on the support, the first clamping component or the second clamping component;

[0011] Wherein, when the grinding component is clamped by the first clamping component and the second clamping component, the grinding disc of the grinding component is located on the side away from the support.

[0012] In some embodiments, the fixed component comprises:

[0013] The magnetic seat is used to be set on the steel pipe to be ground by magnetic attraction, and has a mounting slot.

[0014] The connecting rod has a first end and a second end, the first end is arranged in the mounting slot and can rotate relative to the magnetic seat, and the connecting end is located on the second end.

[0015] In some embodiments, the fixing component further comprises:

[0016] The locking member is arranged on the connecting end, and the connecting end is connected with the support through the locking member.

[0017] In some embodiments, the support has a horizontal through slot;

[0018] The first clamping component comprises:

[0019] The first sliding plate is arranged on the support through the through slot and can move relative to the support along the direction in which the through slot extends;

[0020] At least two first clamping members are arranged on the first sliding plate respectively, and the front part of the grinding device is clamped by all the first clamping members.

[0021] In some embodiments, the second clamping component comprises:

[0022] The second sliding plate is arranged on the support through the through slot and can move relative to the support along the direction in which the through slot extends;

[0023] At least two second clamping members are arranged on the first sliding plate respectively, and the third clamping component is clamped by all the first clamping members, so that the third clamping component can move relative to the support.

[0024] In some embodiments, the first clamping component further comprises:

[0025] Two first limiting members are arranged on the first sliding plate respectively and located on both sides of the support.

[0026] In some embodiments, the first limiting member comprises:

[0027] The first rotating shaft is arranged on the first sliding plate;

[0028] The first rotating member has a first inner ring, the first inner ring is sleeved on the first rotating shaft, so that the first rotating member can rotate relative to the first rotating shaft.

[0029] In some embodiments, the first clamping component further comprises:

[0030] Two second limit members are arranged on the second sliding plate and are respectively located on two sides of the support.

[0031] In some embodiments, the second limit member comprises:

[0032] A second rotating shaft is arranged on the second sliding plate.

[0033] A second rotating member has a second inner ring, which is sleeved on the second rotating shaft, so that the second rotating member can rotate relative to the second rotating shaft.

[0034] The second aspect of the application provides a grinding device, which comprises the clamping device according to any one of the above embodiments.

[0035] The technical solution provided by the application can have the following beneficial effects:

[0036] The clamping device and the grinding device of the application comprise a fixing component, a support, a first clamping component, a second clamping component, a third clamping component, and a handle. The fixing component is connected to a steel pipe to be ground, so that the clamping device is fixed on the steel pipe to be ground. The first clamping component is arranged on the support and clamps a front part of the grinding device. The second clamping component is arranged on the support and is connected to the third clamping component. The third clamping component clamps a rear part of the grinding device through a clamping space formed by the third clamping component. That is, the grinding device can be clamped by the first clamping component and the third clamping component. Meanwhile, when the grinding component is clamped by the first clamping component and the second clamping component, a grinding disc of the grinding component is located on a side away from the support. At this time, an operator can operate the handle to drive the support to rotate relative to the fixing component and move the grinding component up and down, so as to grind the steel pipe to be ground. By using the clamping device of the embodiment, the grinding device can be clamped. When the steel pipe to be ground is ground, the operator does not need to manually hold the grinding device. Instead, the operator only needs to control the handle to grind the steel pipe to be ground. This effectively solves the technical problem that the hand and the arm of the operator are easily damaged due to long-term vibration when the operator manually holds an angle grinder to grind a weld. The grinding of the steel pipe weld is changed from manual operation to mechanization, which reduces the labor intensity, relieves the physical burden of the worker, and improves the safety during the grinding of the steel pipe weld. By adding the clamping device, the precision of the grinding of the steel pipe weld is effectively controlled, and the quality of the grinding of the steel pipe weld is improved. By adding the clamping device, the operation difficulty during the grinding of the steel pipe weld is reduced, and the grinding speed is improved.

[0037] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout the figures, and wherein:

[0039] Figure 1 is a structural schematic view of a clamping device shown in an embodiment of the present application.

[0040] Figure 2 is a structural schematic view of a fixing component of a clamping device shown in an embodiment of the present application.

[0041] Figure 3 is a structural schematic view of a support of a clamping device shown in an embodiment of the present application.

[0042] Figure 4 is a structural schematic view of multiple structures of a clamping device shown in an embodiment of the present application.

[0043] Figure 5 is a working effect schematic view of a clamping device shown in an embodiment of the present application.

[0044] Reference signs: 1, fixing component; 11, magnetic attraction seat; 12, connecting rod; 13, locking piece; 2, support; 21, fastening nut; 22, through groove; 31, third clamping component; 32, second clamping component; 33, first clamping component; 34, first sliding plate; 35, first limiting piece; 36, first clamping piece; 37, second clamping piece; 38, second sliding plate; 39, second limiting piece; 4, handle. DETAILED DESCRIPTION

[0045] Embodiments of the present application will be described in more detail by referring to the drawings. Although embodiments of the present application are shown in the drawings, it should be understood that the present application can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0046] It should be understood that although the terms "first", "second", "third", etc. can be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one piece of information from another piece of information of the same type. For example, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information without departing from the scope of the present application. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0047] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0048] Unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixed connection, can also be detachable connection or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] In order to ensure the welding quality of the pipeline, nondestructive testing is usually carried out after welding. When using ultrasonic wave to detect the butt weld of steel pipe and pipe, the ultrasonic probe can only be scanned from the side of the steel pipe. According to the latest standard specification, when the ultrasonic wave scans the weld, the weld reinforcement needs to be ground flat.

[0050] When the artificial hand-held angle grinder polishes the weld flat, the hand and arm are in a state of vibration for a long time. When polishing upward, the physical consumption is large and easy to fatigue. The hardness of the weld to be polished is usually between 25-35HRC, the polishing efficiency is low, the precision is difficult to control, and the ultrasonic detection effect is affected.

[0051] In view of the above problems, the clamping device provided by the embodiments of the present application can solve the technical problem that the hand and arm are in a state of vibration for a long time when the artificial hand-held angle grinder polishes the weld flat, which is easy to cause damage to the operator's hand or arm. The technical scheme of the embodiments of the present application is described in detail below in combination with the drawings.

[0052] Figure 1 It is the structural schematic diagram of the clamping device shown in the embodiments of the present application.

[0053] Referring to Figure 1 , the first aspect of the present application provides a clamping device for clamping a grinding device, comprising:

[0054] The fixed component 1 has a rotatable connecting end, and the fixed component 1 is used to connect with the steel pipe to be ground flat;

[0055] a support 2, one end of which is connected to the connecting end, so that the support 2 can rotate with the connecting end;

[0056] a first clamping part 33, which is arranged on the support 2 and is used for clamping the front part of the grinding device;

[0057] a second clamping part 32, which is arranged on the support 2;

[0058] a third clamping part 31, which is connected to the second clamping part 32 and has a clamping space with adjustable size, the clamping space being used for placing the rear part of the grinding device so as to clamp the grinding device by the third clamping part 31; and

[0059] a handle 4, which is arranged on the support 2, the first clamping part 33 or the second clamping part 32;

[0060] In the case where the grinding part is clamped by the first clamping part 33 and the second clamping part 32, the grinding disc of the grinding part is located on the side away from the support 2.

[0061] The clamping device and the grinding device of the present application comprise a fixing part 1, a support 2, a first clamping part 33, a second clamping part 32, a third clamping part 31 and a handle 4. The fixing part 1 is connected with the steel pipe to be ground, so that the clamping device is fixed on the steel pipe to be ground. The first clamping part 33 is arranged on the support 2 and clamps the front part of the grinding device. The second clamping part 32 is arranged on the support 2 and is connected with the third clamping part 31. The third clamping part 31 clamps the rear part of the grinding device through the clamping space formed thereby. That is, the grinding device can be clamped by the first clamping part 33 and the third clamping part 31. Meanwhile, when the grinding device is clamped by the first clamping part 33 and the second clamping part 32, the grinding disc of the grinding device is located on the side away from the support 2. At this time, the operator can operate the handle 4 to drive the support 2 to rotate relative to the fixing part 1 and drive the grinding device to move up and down, so as to grind the steel pipe to be ground. Through the clamping device of the present embodiment, the grinding device can be clamped. When the steel pipe to be ground is ground, the operator does not need to manually hold the grinding device. Instead, the operator only needs to control the handle 4 to grind the steel pipe to be ground. This effectively solves the technical problem that the hand and arm of the operator are easily injured when the operator manually holds the angle grinder to grind the weld. The grinding of the steel pipe weld is changed from manual operation to mechanization, which reduces the labor intensity, reduces the physical burden of the worker and improves the safety during the grinding of the steel pipe weld. Through the clamping device, the precision of the grinding of the steel pipe weld is effectively controlled, and the quality of the grinding of the steel pipe weld is improved. Through the clamping device, the operation difficulty during the grinding of the steel pipe weld is reduced, and the grinding speed is improved.

[0062] In the present embodiment, the fixing part 1 can fix the support 2. The fixing part 1 can be clamped on the steel pipe to be ground, or the fixing part 1 can be a magnet that can be attracted to the steel pipe to be ground.

[0063] The fixing part 1 can be provided with a rotatable connecting screw. One end of the connecting screw can be hinged to the fixing part 1, and the other end of the connecting screw can rotate relative to the fixing part 1.

[0064] The support 2 can be a steel pipe or a column with a circular, rectangular or square cross section. The configuration of the steel pipe can reduce the weight and facilitate the operation of the operator. The support 2 can be installed on the connecting end of the fixing part 1 by means of bolts, screws or welding, clamping or other methods, i.e., the support 2 can be installed on the connecting screw mentioned above.

[0065] The first clamping component 33 can be arranged on the support 2 by welding or screw connection, etc. When the first clamping component 33 is arranged on the support 2, its position can also be adjusted according to actual conditions, and is locked at a specified position, so that different models of the grinding device can be clamped conveniently.

[0066] The first clamping component 33 can be a clamp that directly clamps the grinding device, or two clamping columns are directly arranged, a space for placing the front part of the grinding device is formed between the clamping columns, and the front part of the grinding device is locked on the clamping columns by screws or bolts, etc., so that the first clamping component 33 can clamp the front part of the grinding device. Of course, the grinding device can also be clamped by directly locking the front part of the grinding device by bolts.

[0067] The second clamping component 32 can be arranged on the support 2 by welding or screw connection, etc. When the second clamping component 32 is arranged on the support 2, its position can also be adjusted according to actual conditions, and is locked at a specified position, so that different models of the grinding device can be clamped conveniently.

[0068] The third clamping component 31 can be a clamp that forms a clamping space with adjustable size and directly clamps the grinding device, or two clamping columns are directly arranged, a clamping space for placing the rear part of the grinding device is formed between the clamping columns, and the rear part of the grinding device is locked on the clamping columns by screws or bolts, etc., so that the third clamping component 31 can clamp the rear part of the grinding device. Of course, the grinding device can also be clamped by directly locking the rear part of the grinding device by bolts.

[0069] Since the rear part of the grinding device is usually a motor, etc., the third clamping component 31 can be connected with the second clamping component 32, so that the shape and structure of the third clamping component 31 can be adjusted and adapted to the clamping space of the rear part of the grinding device more easily.

[0070] The second clamping component 32 can be connected with the third clamping component 31 by bolts, or two connecting columns can clamp the two sides of the third clamping component 31, respectively, so that the clamping device is more stable in force, and the problem of easy shaking due to vibration during the operation of the grinding device is avoided.

[0071] In addition, the third clamping component 31 comprises:

[0072] The third clamping piece, the adjusting bolt and the adjusting nut, the third clamping piece has a containing cavity and a communicating opening, the adjusting bolt is arranged on the opening, the adjusting bolt passes through the third clamping piece on both sides of the opening, the adjusting bolt nut is located on the outside of the third clamping piece, and the adjusting nut is located on the other outside of the third clamping piece and connected with the adjusting bolt, so that the size of the opening is adjusted through the adjusting bolt and the adjusting nut, the containing cavity and the adjusting bolt constitute a clamping space, and the size of the clamping space can be adjusted by adjusting the size of the opening.

[0073] The handle 4 can be arranged on the support 2, the first clamping part 33 or the second clamping part 32; by being arranged on the support 2, the first clamping part 33 or the second clamping part 32, an operator can directly control the position of the grinding device relative to the steel pipe to be ground by grasping the handle 4, so as to facilitate grinding of the steel pipe to be ground.

[0074] The grinding part is located away from the support 2 on the side of the first clamping part 33 and the second clamping part 32. The grinding device can be directly moved up and down by rotating the support 2 relative to the fixed part 1 to grind the steel pipe to be ground. Moreover, the clamping device has complete functions, and can be used for forward grinding and lateral grinding.

[0075] The grinding device of the embodiment can be an angle grinder or other portable grinding device.

[0076] In some embodiments, the fixed part 1 comprises:

[0077] The magnetic seat 11 has a mounting groove, and is arranged on the steel pipe to be ground by magnetic attraction;

[0078] The connecting rod 12 has a first end and a second end, the first end is arranged in the mounting groove and can rotate relative to the magnetic seat 11, and the connecting end is located on the second end.

[0079] In the embodiment, the magnetic seat 11 can be arranged on the steel pipe to be ground by magnetic attraction. Thus, the grinding device can be better fixed on the steel pipe, and the bottom of the magnetic seat 11 can be arc-shaped to facilitate cooperation with the arc of the steel pipe.

[0080] The first end of the connecting rod 12 is hinged in the mounting groove, so that the connecting rod 12 can rotate relative to the magnetic seat 11 along the center of the first end. The connecting rod 12 can be an L-shaped rod or other rod.

[0081] The connecting end is located on the second end of the connecting rod 12, that is, the second end of the connecting rod 12 is connected with the support 2.

[0082] In some embodiments, the fixing component 1 further comprises:

[0083] A locking member 13 is arranged on the connecting end, and the connecting end is connected with the support 2 through the locking member 13.

[0084] In the embodiment, the locking member 13 can be a locking bolt arranged on the second end of the connecting rod 12, and a fastening nut 21 can be arranged on the support 2. The support 2 and the connecting rod 12 are connected by locking the fastening nut 21 on the locking bolt. The locking member 13 can also be an external thread formed on the second end of the connecting rod 12, and an internal thread matched with the external thread is formed on the support 2. The support 2 and the connecting rod 12 are connected by the internal and external thread connection. Of course, the support 2 can also be directly connected with the connecting rod 12 by other clamping or welding methods.

[0085] In some embodiments, the support 2 has a horizontal through groove 22;

[0086] The first clamping component 33 comprises:

[0087] A first sliding plate 34 is arranged on the support 2 through the through groove 22 and can move relative to the support 2 along the extending direction of the through groove 22;

[0088] At least two first clamping members 36 are arranged on the first sliding plate 34 respectively, and the front part of the grinding device is clamped by all the first clamping components 33.

[0089] In the embodiment, the support 2 can be provided with the horizontal through groove 22 at the middle or upper and lower positions, the first sliding plate 34 passes through the through groove 22 and extends to both sides of the through groove 22, so that the first sliding member can move and adjust relative to the support 2 along the extending direction of the through groove 22, so that the position of the first clamping component 33 can be adjusted relative to the support 2.

[0090] The first clamping member 36 can be an L-shaped screw rod provided with a locking nut at both ends of the L-shaped screw rod. One end of the L-shaped screw rod is connected with the first sliding plate 34, and specifically, the first end of the L-shaped screw rod passes through the first sliding plate 34 and is locked on the first sliding plate 34 by a wing nut. Another locking nut is arranged on the second end of the L-shaped screw rod, and the L-shaped screw rod is connected with the front part of the grinding device through the other locking nut.

[0091] The first clamping component 33 can be two, both arranged on the first sliding plate 34, and the positions of the two first clamping components 33 are one on one side of the support 2 and the other on the other side of the support 2, for example, one on the left side of the support 2 and the other on the right side of the support 2, so as to clamp the two sides of the front part of the grinding device.

[0092] Through the clamping device of the embodiment, the position of the first clamping component 33 relative to the support 2 can be adjusted, so as to adapt to grinding devices of various lengths and sizes, and the adaptability of the clamping device is improved.

[0093] In some embodiments, the second clamping component 32 comprises:

[0094] The second sliding plate 38 is arranged on the support 2 through the through groove 22 and can move relative to the support 2 along the extension direction of the through groove 22;

[0095] The second clamping component 32 can be two, both arranged on the second sliding plate 38, and the positions of the two second clamping components 32 are one on one side of the support 2 and the other on the other side of the support 2, for example, one on the left side of the support 2 and the other on the right side of the support 2, so as to clamp the two sides of the third clamping component 31.

[0096] In the embodiment, the support 2 can be provided with a horizontal through groove 22 in the middle or upper and lower positions, and the second sliding plate 38 passes through the through groove 22 and extends to both sides of the through groove 22, so that the second sliding plate 38 can be adjusted relative to the support 2 along the extension direction of the through groove 22, and the position of the second clamping component 32 relative to the support 2 can be adjusted.

[0097] The second clamping component 32 can be two, both arranged on the second sliding plate 38, and the positions of the two second clamping components 32 are one on one side of the support 2 and the other on the other side of the support 2, for example, one on the left side of the support 2 and the other on the right side of the support 2, so as to clamp the two sides of the third clamping component 31.

[0098] The second clamping component 32 can be two, both arranged on the second sliding plate 38, and the positions of the two second clamping components 32 are one on one side of the support 2 and the other on the other side of the support 2, for example, one on the left side of the support 2 and the other on the right side of the support 2, so as to clamp the two sides of the third clamping component 31.

[0099] Through the clamping device of the embodiment, the position of the first clamping component 33 relative to the support 2 can be adjusted, so as to adapt to grinding devices of various lengths and sizes, and the adaptability of the clamping device is improved.

[0100] In some embodiments, the first clamping component 33 further comprises:

[0101] two first limiting members 35, each disposed on the first sliding plate 34 and located at two sides of the support 2.

[0102] In the embodiment, the first limiting members 35 are disposed on the first sliding plate 34 at two sides of the support 2, so that the first sliding plate 34 cannot deviate during movement, and the first clamping component 33 can stably clamp the front part of the grinding device.

[0103] The first limiting member 35 can be a roller disposed on the first sliding plate 34, or a protrusion, etc. The first sliding plate 34 can move along the extension direction of the through groove 22, but cannot move along the two sides of the horizontal support 2.

[0104] In some embodiments, the first limiting member 35 comprises:

[0105] a first rotating shaft disposed on the first sliding plate 34;

[0106] a first rotating member having a first inner ring, the first inner ring being sleeved on the first rotating shaft so that the first rotating member can rotate relative to the first rotating shaft.

[0107] In the embodiment, the first rotating shaft can be installed on the first sliding plate 34 by welding or threaded connection, etc. The first rotating member can be a roller bearing, the first inner ring of which is installed on the first rotating shaft, and the outer ring can rotate relative to the inner ring, so that the first sliding plate 34 can move more smoothly along the extension direction of the through groove 22, and cannot move along the two sides of the horizontal support 2.

[0108] In some embodiments, the first clamping component 33 further comprises:

[0109] two second limiting members 39, each disposed on the second sliding plate 38 and located at two sides of the support 2.

[0110] In the embodiment, the second limiting members 39 are disposed on the second sliding plate 38 at two sides of the support 2, so that the second sliding plate 38 cannot deviate during movement, and the second clamping component 32 can stably clamp the front part of the grinding device.

[0111] The second limiting member 39 can be a roller disposed on the second sliding plate 38, or a protrusion, etc. The second sliding plate 38 can move along the extension direction of the through groove 22, but cannot move along the two sides of the horizontal support 2.

[0112] In some embodiments, the second limiting member 39 comprises:

[0113] A second rotating shaft is arranged on the second sliding plate 38.

[0114] A second rotating member has a second inner ring, which is sleeved on the second rotating shaft, so that the second rotating member can rotate relative to the second rotating shaft.

[0115] In the present embodiment, the second rotating shaft can be installed on the second sliding plate 38 by welding or threaded connection, and the second rotating member can be a roller bearing, the second inner ring of which is installed on the second rotating shaft, and the outer ring can rotate relative to the inner ring, so that the second sliding plate 38 can move more smoothly when moving along the extension direction of the through groove 22, and the movement of the second sliding plate 38 along the two sides of the horizontal bracket 2 is limited.

[0116] In the operation process, the connecting rod 12 is configured with a locking bolt, then the locking nut at the end of the bracket 2 is screwed in, then the bracket 2 is connected, and the angular sander (sanding device) is inserted into the first clamping member 33 and the second clamping member 32.

[0117] After the overall assembly is completed, in use, the on-off magnetic base is first fixed to a suitable position of the steel pipe to be sanded, and the angular sander is selected to be forward or lateral according to the needs, and then the locking bolt is fastened. By rotating the bracket 2 up and down around the on-off magnetic base, the sander is controlled to polish the weld to a certain depth, and by controlling the handle 4 to control the sander to slide on the bracket 2, the sander is controlled to polish the weld at different positions. By changing the position of the on-off magnetic base, the entire weld of the pipe is polished.

[0118] The application also provides a sanding device, which comprises the clamping device as above

[0119] The grinding device of the application comprises a clamping device, the clamping device comprises a fixing part 1, a support 2, a first clamping part 33, a second clamping part 32, a third clamping part 31 and a handle 4, the fixing part 1 is connected with the steel pipe to be ground, so that the clamping device is fixed on the steel pipe to be ground. The first clamping part 33 is arranged on the support 2 and clamps the front part of the grinding device; the second clamping part 32 is arranged on the support 2 and connected with the third clamping part 31, the third clamping part 31 clamps the rear part of the grinding device through the clamping space formed thereby, that is, the grinding device can be clamped by the first clamping part 33 and the third clamping part 31, and at the same time, the grinding part is clamped by the first clamping part 33 and the second clamping part 32, and the grinding disc of the grinding part is located away from the support 2. At this time, the operator can operate the handle 4 to make the support 2 rotate relative to the fixing part 1 to drive the grinding part to move up and down, so as to grind the steel pipe to be ground. Through the clamping device of the embodiment, the grinding device can be clamped, and when the steel pipe to be ground is ground, the operator does not need to manually hold it, but only needs to control the handle 4 to grind the steel pipe to be ground. Effectively solve the technical problem that the hand and arm are in a vibrating state for a long time when manually holding the angle grinder to grind the weld, which easily causes damage to the operator's hand or arm. The steel pipe weld grinding is changed from manual operation to mechanization, which reduces the labor intensity, reduces the physical burden of workers, and improves the safety of steel pipe weld grinding. By installing the clamping device, the precision of steel pipe weld grinding is effectively controlled, and the quality of steel pipe weld grinding is improved. By installing the clamping device, the operation difficulty of steel pipe weld grinding is reduced, and the grinding speed is improved.

[0120] The solutions of the application have been described in detail above with reference to the drawings. In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments. Those skilled in the art should also know that the actions and modules involved in the specification are not necessarily required by the application. In addition, it can be understood that the steps in the method embodiments of the application can be adjusted, combined and reduced in sequence according to actual needs, and the modules in the device embodiments of the application can be combined, divided and reduced according to actual needs.

[0121] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations, modifications, and variations that fall within the scope of the patent. The terms used herein are to be given their ordinary and customary meaning to a person of ordinary skill in the art and are not to be limited to a specialized meaning that can be intended in context of certain embodiments.

Claims

1. A clamping device for clamping a grinding device, characterized in that The grinding device comprises: a fixing component having a rotatable connecting end, the fixing component being used to connect with a steel pipe to be ground; a support connected with the connecting end, so that the support can rotate with the connecting end; a first clamping component arranged on the support and used to clamp a front part of the grinding device; a second clamping component arranged on the support; a third clamping component connected with the second clamping component and having a clamping space with adjustable size, the clamping space being used to put a rear part of the grinding device into, so that the grinding device is clamped by the third clamping component; and a handle arranged on the support, the first clamping component or the second clamping component. When the grinding device is clamped by the first clamping component and the second clamping component, a grinding disc of the grinding device is located on a side away from the support. The fixing component comprises:

2. The clamping device of claim 1, wherein a magnetic seat having a mounting groove, the magnetic seat being used to be arranged on the steel pipe to be ground by magnetic attraction; a connecting rod having a first end and a second end, the first end being arranged in the mounting groove and being rotatable relative to the magnetic seat, and the connecting end being located on the second end. The fixing component further comprises:

3. The clamping device of claim 2, wherein a locking member arranged on the connecting end, the connecting end being connected with the support by the locking member. The support has a horizontal through groove; 4. The clamping device of claim 3, wherein The first clamping component comprises: a first sliding plate arranged on the support through the through groove and being movable relative to the support along a direction in which the through groove extends; at least two first clamping members, each of the first clamping members being arranged on the first sliding plate, and the front part of the grinding device being clamped by all the first clamping members. The second clamping component comprises:

5. The clamping device of claim 4, wherein a second sliding plate arranged on the support through the through groove and being movable relative to the support along a direction in which the through groove extends; at least two second clamping members, each of the second clamping members being arranged on the first sliding plate, and the third clamping component being clamped by all the first clamping members, so that the third clamping component is movable relative to the support. The first clamping component further comprises:

6. The clamping device of claim 5, wherein two first limiting members, each of the first limiting members being arranged on the first sliding plate and being located on a side of the support. The first limiting member comprises:

7. The clamping device of claim 6, wherein a first rotating shaft arranged on the first sliding plate; a first rotating member having a first inner ring, the first inner ring being sleeved on the first rotating shaft, so that the first rotating member is rotatable relative to the first rotating shaft. The first clamping component further comprises:

8. The clamping device of claim 7, wherein two second limiting members, each of the second limiting members being arranged on the second sliding plate and being located on a side of the support. The second limiting member comprises:

9. The clamping device of claim 8, wherein a second rotating shaft arranged on the second sliding plate; a second rotating member having a second inner ring, the second inner ring being sleeved on the second rotating shaft, so that the second rotating member is rotatable relative to the second rotating shaft. The grinding device comprises the clamping device according to any one of claims 1-9.

10. A grinding apparatus characterized by, ​

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