Clamping device

Abstract

The utility model belongs to the technical field of aluminum electrolysis production, and provides a clamping device which comprises a main clamping arm, a main clamping arm, an auxiliary clamping arm and an auxiliary clamping arm. The auxiliary clamping arm comprises a left auxiliary arm and a right auxiliary arm, one end of the left auxiliary arm is rotationally connected with the upper end of the right main arm, one end of the right auxiliary arm is rotationally connected with the upper end of the left main arm, and the ends, away from the main clamping arm, of the left auxiliary arm and the right auxiliary arm are rotationally connected into a whole through an upper rotating shaft; the ends, away from the auxiliary clamping arms, of the main clamping arms are slidably provided with moving assemblies, the moving assemblies are connected with the main clamping arms in a clamped mode through clamping assemblies, and clamping plates are detachably arranged on the moving assemblies and used for making contact with a clamped object. The anode clamping device can be suitable for clamping carbon body anodes of different sizes and specifications, the influence of high temperature and anode falling and adhesion on the clamping effect of the device can be avoided, and the stability and the safety of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum electrolysis production, in particular to a clamping device. Background Art

[0002] Aluminum electrolysis is the process of obtaining aluminum through electrolysis. Modern aluminum electrolysis industrial production adopts cryolite-alumina molten salt electrolysis. Molten cryolite is the solvent, alumina is the solute, carbonaceous body is the anode, and aluminum liquid is the cathode. After a strong direct current is passed through, an electrochemical reaction is carried out at the two electrodes in the electrolytic cell at a temperature of 950 to 970 degrees Celsius. Carbonaceous body needs to be used as the anode during the electrolysis process, and a clamping device is needed to clamp and transfer the carbonaceous body during transportation.

[0003] However, since the size of the carbonaceous anode changes before and after use, the carbonaceous anode will become smaller after use, but the general clamping device is not stable enough for clamping carbonaceous bodies of different sizes, and its practicality is poor. In addition, since the carbonaceous anode is in a high temperature state after use, part of the carbonaceous body may fall off and stick to the surface of the clamping device, causing damage to the clamping device or adversely affecting the subsequent clamping state, and the safety and stability are poor.

[0004] Therefore, in view of the above problems, a clamping device is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model develops a clamping device which can be suitable for clamping carbon anodes of different sizes and specifications, and can avoid the influence of high temperature and anode shedding and adhesion on the clamping effect of the device, thereby improving the stability and safety of the device.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A clamping device comprises: a main clamping arm, comprising a left main arm and a right main arm, the left main arm and the right main arm are connected as a whole through a main rotating shaft; a secondary clamping arm, comprising a left secondary arm and a right secondary arm, one end of the left secondary arm is connected as a whole through a main rotating shaft, one end of the right secondary arm is connected as a whole through a main rotating shaft, and the ends of the left secondary arm and the right secondary arm away from the main clamping arm are connected as a whole through an upper rotating shaft; a moving assembly is slidably arranged at one end of the main clamping arm away from the secondary clamping arm, the moving assembly is clamped with the main clamping arm through a clamping assembly, a clamping plate is detachably arranged on the moving assembly, and the clamping plate is used to contact the clamped object.

[0008] Preferably, the left main arm and the right main arm are both configured to be L-shaped, and a number of latch teeth are provided on the inner side of the bottom end of the left main arm and the right main arm along their length direction to form a latch row, and sliding grooves whose length direction is parallel to the length direction of the latch row are provided on the main clamping arms on both sides of the latch row, and the sliding grooves are used for sliding connection with the moving component.

[0009] Preferably, a chip-falling groove is provided between the clamping row and the sliding groove, and the length direction of the chip-falling groove is parallel to the length direction of the sliding groove.

[0010] Preferably, the movable component includes a movable plate, sliding plates are arranged on both sides of the movable plate, the sliding plates are used to slide in the sliding grooves on both sides, limiting blocks are arranged on the side of the upper end of the sliding plate away from the movable plate, and a protrusion is arranged on the side of the movable plate away from the main clamping arm, and the protrusion is used to connect the clamping plate.

[0011] Preferably, a limit stopper is provided at the bottom end of the sliding groove, and the limit stopper is used to prevent the limit block from moving downward.

[0012] Preferably, the clamping assembly is arranged on the top of the movable assembly, and the clamping assembly includes an adjusting tooth and an elastic member. The adjusting tooth is rotatably arranged on the movable plate, and the adjusting tooth is used to clamp with the tooth on the card row. The elastic member is arranged between the adjusting tooth and the movable plate, and the elastic member is used to press the adjusting tooth onto the tooth on the card row.

[0013] Preferably, the splints include multiple splints, and grooves are provided on the sides of the splints close to the movable plate corresponding to the protrusions, the grooves are engaged with the protrusions to fix the relative positions of the splints and the movable plate, and support blocks are provided on the splints for auxiliary support.

[0014] Preferably, a support column is set at the bottom of the side of the movable plate close to the main clamping arm, and a support rod is rotatably set at the bottom end of the main clamping arm. The end of the support rod away from the main clamping arm can be connected to the support column to provide auxiliary support for the bottom end of the movable plate.

[0015] Preferably, at least two groups of main clamping arms and auxiliary clamping arms are provided, and the main clamping arms and auxiliary clamping arms are connected by sliding shafts and telescopic shafts.

[0016] Preferably, it further comprises a telescopic power member, one end of which is rotatably arranged on the upper rotating shaft, and the other end of which is rotatably arranged on the main rotating shaft.

[0017] The effects provided in the utility model content are only the effects of the embodiments, not all the effects of the utility model. The above technical solution has the following advantages:

[0018] 1. The utility model provides a moving assembly, which drives the clamping plate to move, so as to extend the clamping length of the clamping end of the main clamping arm, so as to facilitate the clamping of carbon anodes of different sizes, thereby increasing the applicable scope of the device clamping and improving the practicability of the device;

[0019] 2. The utility model provides a plurality of clamping plates detachably disposed on the mobile assembly. When the device clamps a high-temperature carbon anode and the carbon anode partly falls off and adheres to the clamping plate, the clamping plate can be easily replaced to avoid affecting the subsequent clamping, thereby improving the safety of the device.

[0020] 3. The utility model provides a clamping assembly, and the clamping assembly and the clamping row on the main clamping arm can be relatively moved and clamped, thereby improving the stability of the moving assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 It is a front structural schematic diagram of an embodiment of the utility model;

[0024] Figure 3 It is a left-side structural schematic diagram of an embodiment of the utility model;

[0025] Figure 4 This is a schematic structural diagram of the bottom end portion of the main clamping arm of an embodiment of the utility model;

[0026] Figure 5 This is a front view of a movable plate according to an embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of the back side of the movable plate of an embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the back side of a splint according to an embodiment of the utility model;

[0029] Figure 8 This is a schematic diagram of the connection of the clamping assembly of an embodiment of the utility model;

[0030] Fig. 9 It is a schematic structural diagram of the adjusting latch teeth according to an embodiment of the utility model.

[0031] In the figure, 1. left main arm; 2. right main arm; 3. main rotating shaft; 4. left auxiliary arm; 5. right auxiliary arm; 6. upper rotating shaft; 7. clamping plate; 8. clamping row; 9. sliding groove; 10. chip dropping groove; 11. movable plate; 12. sliding plate; 13. limiting block; 14. protrusion; 15. limiting bayonet; 16. adjusting tooth; 17. elastic member; 18. groove; 19. support block; 20. support column; 21. support rod; 22. telescopic power member. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] like Figure 1-9 As shown, the utility model provides a technical solution:

[0034] A clamping device is arranged on a lifting device for use, the clamping device comprises a main clamping arm and a secondary clamping arm, the main clamping arm comprises a left main arm 1 and a right main arm 2, the middle parts of the left main arm 1 and the right main arm 2 are rotatably connected as a whole through a main rotating shaft 3 at the same height; the secondary clamping arm comprises a left auxiliary arm 4 and a right auxiliary arm 5, one end of the left auxiliary arm 4 is rotatably connected to the upper end of the right main arm 2 through a left rotating shaft, one end of the right auxiliary arm 5 is rotatably connected to the upper end of the left main arm 1 through a right rotating shaft, and the left auxiliary arm 4 and the right auxiliary arm 5 are rotatably connected as a whole through an upper rotating shaft 6 at one end away from the main clamping arm; a moving assembly is slidably arranged on the inner side opposite to the end of the main clamping arm away from the secondary clamping arm, the moving assembly can be clamped with the main clamping arm through a clamping assembly, and a clamping plate 7 is detachably arranged on the moving assembly, the clamping plate 7 is used to contact with the clamped object, that is, contact with the carbonaceous anode in this embodiment.

[0035] In this embodiment, the left main arm 1 and the right main arm 2 are both configured to be L-shaped. After the left main arm 1 and the right main arm 2 are connected by the main rotating shaft 3, they are in an X-shape, and the short sides of the L-shape of the left main arm 1 and the right main arm 2 are opposite to each other. A number of latch teeth are evenly arranged on the inner sides of the bottom ends of the opposite short sides of the L-shape of the left main arm 1 and the right main arm 2 along their length direction. The number of latch teeth form a latch row 8, and the tooth tips of the number of latch teeth are inclined upward. Sliding grooves 9 whose length directions are parallel to the length directions of the latch rows are arranged on the main clamping arms on both sides of the latch row 8. The length of the sliding grooves 9 is preferably set to be consistent with the length of the latch row 8. The sliding grooves 9 are used to be slidably connected with the moving component to play a guiding and limiting role to prevent the moving component from falling off the main clamping arms, thereby improving the safety of the device.

[0036] In this embodiment, a chip groove 10 is provided between the clamping row 8 and the sliding groove 9. The length direction of the chip groove 10 is parallel to the length direction of the sliding groove 9. The chip groove 10 is an upper and lower through groove. When the device is clamped, some chip-like debris may fall from the carbonaceous anode. These debris fall on the clamping teeth of the clamping row 8 and affect the clamping of the clamping assembly. By providing the chip groove 10, the clamping teeth of the clamping row 8 are cleaned when the clamping assembly is replaced, and the cleaned chip-like debris can fall out along the chip groove 10, and there is no need for manual centralized discharge, which reduces labor intensity and improves practicality and efficiency.

[0037] In this embodiment, the moving component includes a movable plate 11, sliding plates 12 are arranged on both sides of the movable plate, the sliding plates 12 are used to slide in the sliding grooves 9 on both sides, and limiting blocks 13 are arranged on the side of the upper end of the sliding plate 12 away from the movable plate 11. A protrusion 14 is arranged on the side of the movable plate 11 away from the main clamping arm, and the protrusion 14 is used to connect the clamping plate 7. The protrusion 14 of this embodiment is arranged on the lower half of the sliding plate 12, and the setting direction is consistent with the length direction of the sliding plate 12, so as to facilitate the installation of the clamping plate 7 and improve the practicability of the device.

[0038] In this embodiment, a limit snap-in 15 is provided at the bottom of the sliding groove 9, and the limit snap-in 15 is used to block the downward movement of the limit block 13, so as to prevent the clamping assembly from sliding down due to gravity after being separated from the clamping row 8 and directly escaping from the sliding groove 9. The limit snap-in 15 finally blocks the limit block 13, thereby improving the safety of the device.

[0039] In another embodiment, the sliding groove 9 is configured as a structure in which the groove wall on one side can be opened. Specifically, the groove wall and the groove bottom plate on the side of the sliding groove 9 away from the main clamping arm are configured as an integral whole, and are separately configured from the groove wall on the side of the sliding groove 9 close to the main clamping arm. When the sliding groove 9 is connected to the moving component, the groove bottom plate is detachably fixed to the outer side of the groove wall on the side of the sliding groove 9 close to the main clamping arm by screws. This configuration facilitates the placement of the sliding plate 12 in the sliding groove 9, avoiding interference of the groove wall on the side of the sliding groove 9 away from the main clamping arm with the installation of the sliding plate 12. Moreover, since the force-bearing side in the sliding groove 9 is on the groove wall on the side of the sliding groove 9 close to the main clamping arm when the device is in use, it has little influence on the groove wall on the side of the sliding groove 9 away from the main clamping arm, thereby improving the practicability of the device.

[0040] In this embodiment, the clamping assembly is arranged on the top of the moving assembly, and the clamping assembly includes an adjusting tooth 16 and an elastic member 17. The adjusting tooth 16 is rotatably arranged on the movable plate 11 through the connecting shaft. The tooth tip of the adjusting tooth 16 is tilted downward and can contact with the tooth on the card row 8, and is used to clamp and position with the tooth on the card row 8. The elastic member 17 is arranged between the adjusting tooth 16 and the bottom of the movable plate 11. The elastic member 17 can be a spring. The elastic member 17 is used to press the adjusting tooth 16 on the card row 8 through elastic potential energy. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16. The lever 16 is engaged with the latch 16 and the latch 16 is engaged with the latch 16.

[0041] In the present embodiment, the splint 7 includes a plurality of the same splints or a plurality of splints of different sizes, which is convenient for replacement of a splint 7 after it is damaged or for appropriate replacement and clamping of clamped objects of different clamping volumes or shapes, thereby improving the practicability of the device; and grooves 18 are provided on the side surfaces of the splint 7 close to the movable plate 11 corresponding to the protrusions 14, and the grooves 18 are clamped with the protrusions 14, preferably set to T-shaped clamping or dovetail clamping, which has better stability, and the top of the groove 18 in the present embodiment is a closed plate, so that the protrusion 14 is blocked at the top of the groove 18 to prevent the splint 7 from falling, thereby fixing the relative position between the splint 7 and the movable plate 11, and a support block 19 is provided on the splint 7 to assist in supporting the splint 7, thereby improving the stability of the device.

[0042] In another embodiment, the protrusion 14 can also be set on the movable plate 11 perpendicular to the length direction of the movable plate 11 or inclined to the length direction of the movable plate 11. The length direction of the groove 18 on the clamping plate 7 is consistent with the length direction of the protrusion 14, so that the clamping plate 7 can be installed horizontally or obliquely downward, thereby improving practicality.

[0043] In this embodiment, a support column 20 is set at the bottom of the side of the movable plate 11 close to the main clamping arm, and a support rod 21 is rotatably set at the bottom end of the main clamping arm. The end of the support rod 21 away from the main clamping arm can be connected to the support column 20, which is used to auxiliary support the bottom end of the movable plate 11. After the movable plate 11 slides out of the sliding groove 9 too much, the contact area between the main clamping arm and the movable plate 11 is reduced, that is, the support for the movable plate 11 will also be reduced, which is not conducive to the stability of clamping. By setting the support column 20 and the support rod 21, the movable plate 11 is auxiliary supported, and the stability of the device is improved. Preferably, the support rod 21 can be set with multiple rigid rods of different lengths or set as a retractable but temporarily fixed length telescopic rod to adapt to the different sliding lengths of the movable plate 11, thereby improving safety and practicality.

[0044] In another embodiment, a storage slot for placing the support rod 21 is also provided on the main clamping arm. When the support rod 21 is not needed, the support rod 21 is placed in the storage slot to avoid damage to the support rod 21, thereby improving the economy of the device.

[0045] In another embodiment, a handle is provided on the clamping plate 7 to facilitate the operator to take and install the device, thereby improving the efficiency and safety of the device.

[0046] In this embodiment, at least two groups of main clamping arms and auxiliary clamping arms are provided, and the main clamping arms and the auxiliary clamping arms are connected by sliding shafts and telescopic shafts. The main rotating shaft 3 and the upper rotating shaft 6 can be set as sliding shafts, and the left rotating shaft and the right rotating shaft are set as telescopic shafts. The distance between the two groups of main clamping arms and auxiliary clamping arms can be changed by telescoping the telescopic shafts to adapt to the clamping of objects of different lengths, thereby improving the stability and practicality of the device.

[0047] In this embodiment, it also includes a telescopic power member 22, one end of the telescopic power member 22 is rotatably set on the upper rotating shaft 6, and the other end of the telescopic power member 22 is rotatably set on the main rotating shaft 3. The telescopic power member 22 is extended to clamp the device, and the telescopic power member 22 is retracted to release the device, thereby improving the efficiency of the device.

[0048] In another embodiment, the upper rotating shaft 6 is connected to the lifting device above, so that the telescopic power member 22 of the device can be in a relaxed state when clamping, and self-clamping is achieved through the gravity of the clamped object itself and the friction between it and the clamping plate 7. When releasing, it is only necessary to retract the telescopic power member 22 to put down the clamped object, thereby improving the economy of use.

[0049] In this embodiment, the two groups of left main arms 1 and left auxiliary arms 4 are both located on the outside away from the telescopic power member 22, and the two groups of right main arms 2 and right auxiliary arms 5 are both located on the inside close to the telescopic power member 22, so that the force is more uniform during clamping, avoiding safety problems caused by uneven clamping force during clamping. In another embodiment, the right main arm 2 and the right auxiliary arm 5 can also be located on the outside, and the left main arm 1 and the left auxiliary arm 4 can be located on the inside, thereby improving the practicability and safety of the device.

[0050] Working principle: First, according to the length of the carbon anode to be clamped, the distance between the two groups of main clamping arms and the two groups of auxiliary clamping arms is adjusted so that the distance during clamping is not less than half of the length of the carbon anode, thereby improving the stability of clamping; then, according to the size of the carbon anode, the position of the movable component is adjusted so that the device can completely clamp the carbon anode. Specifically, the pull plate on the adjusting clamping tooth 16 is pulled to compress the elastic member 17, and the adjusting clamping tooth 16 is disconnected from the clamping teeth on the clamping row 8, and the position of the movable plate 11 is moved. After the position of the movable plate 11 is determined, the pull plate on the adjusting clamping tooth 16 is released, and the elastic member 17 rebounds, so that the adjusting clamping tooth 16 is again engaged with the clamping teeth on the clamping row 8, so as to limit the movable plate 11 from moving downward; when the movable plate 11 extends too much out of the main clamping arm For safety reasons, a support rod 21 of appropriate length is supported between the support column 20 on the back of the movable plate 11 and the bottom end of the main clamping arm to improve the safety of the device when in use; the device is set on a lifting device, the lifting device drives it to move to the clamping position, the telescopic power member 22 is started to retract, and the clamping device is opened to facilitate the clamping and placement of the carbonaceous anode, the telescopic power member 22 is extended, the clamping device clamps the carbonaceous anode, and the carbonaceous anode is lifted and moved by the lifting device; after the device has been used for a period of time, the splint 7 may be adhered to the material detached from the carbonaceous anode or the splint 7 is damaged by high temperature, then the splint 7 is replaced without replacing the entire device, and it will not affect the continuous use of the device. The replaced splint 7 can be reused after cleaning, thereby improving the economic efficiency of production.

[0051] The parts not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A clamping device, characterized in that: include: The main clamping arm comprises a left main arm (1) and a right main arm (2), wherein the left main arm (1) and the right main arm (2) are rotatably connected to form a whole through a main rotating shaft (3); The auxiliary clamping arm comprises a left auxiliary arm (4) and a right auxiliary arm (5), one end of the left auxiliary arm (4) is rotatably connected to the upper end of the right main arm (2), one end of the right auxiliary arm (5) is rotatably connected to the upper end of the left main arm (1), and the ends of the left auxiliary arm (4) and the right auxiliary arm (5) away from the main clamping arm are rotatably connected as a whole via an upper rotating shaft (6); A moving assembly is slidably arranged at one end of the main clamp arm away from the auxiliary clamp arm. The moving assembly is clamped with the main clamp arm via a clamping assembly. A clamping plate (7) is detachably arranged on the moving assembly. The clamping plate (7) is used to contact the clamped object.

2. A clamping device according to claim 1, characterized in that: The left main arm (1) and the right main arm (2) are both arranged in an L shape, and a plurality of latching teeth are arranged on the inner sides of the bottom ends of the left main arm (1) and the right main arm (2) along their length direction to form a latching row (8), and sliding grooves (9) are arranged on the main clamping arms on both sides of the latching row (8) and the length direction of the sliding grooves (9) are parallel to the length direction of the latching row, and the sliding grooves (9) are used for sliding connection with the moving component.

3. A clamping device according to claim 2, characterized in that: A chip dropping groove (10) is provided between the clamping row (8) and the sliding groove (9), and the length direction of the chip dropping groove (10) is parallel to the length direction of the sliding groove (9).

4. A clamping device according to claim 3, characterized in that: The movable assembly comprises a movable plate (11), sliding plates (12) are arranged on both sides of the movable plate, the sliding plates (12) are used to slide in the sliding grooves (9) on both sides, and limiting blocks (13) are arranged on the side of the upper end of the sliding plate (12) away from the movable plate (11), and a protrusion (14) is arranged on the side of the movable plate (11) away from the main clamping arm, and the protrusion (14) is used to connect the clamping plate (7).

5. A clamping device according to claim 4, characterized in that: A limit snap-in (15) is provided at the bottom end of the sliding groove (9), and the limit snap-in (15) is used to prevent the limit snap block (13) from moving downward.

6. A clamping device according to claim 5, characterized in that: The clamping assembly is arranged on the top of the movable assembly, and the clamping assembly comprises an adjusting latch tooth (16) and an elastic member (17). The adjusting latch tooth (16) is rotatably arranged on the movable plate (11), and the adjusting latch tooth (16) is used to engage in a locking position with a latch tooth on the latch row (8). The elastic member (17) is arranged between the adjusting latch tooth (16) and the movable plate (11), and the elastic member (17) is used to press the adjusting latch tooth (16) onto the latch tooth of the latch row (8).

7. A clamping device according to claim 6, characterized in that: The clamping plate (7) comprises a plurality of clamping plates, and a groove (18) is provided on the side surface of the clamping plate (7) close to the movable plate (11) corresponding to the protrusion (14), the groove (18) is engaged with the protrusion (14) and is used to fix the relative position of the clamping plate (7) and the movable plate (11), and a support block (19) is provided on the clamping plate (7) for auxiliary support.

8. A clamping device according to claim 7, characterized in that: A support column (20) is arranged at the bottom of the side of the movable plate (11) close to the main clamping arm, and a support rod (21) is rotatably arranged at the bottom end of the main clamping arm. The end of the support rod (21) away from the main clamping arm can be connected to the support column (20) for auxiliary support of the bottom end of the movable plate (11).

9. A clamping device according to claim 8, characterized in that: At least two groups of main clamping arms and auxiliary clamping arms are provided, and the main clamping arms and the auxiliary clamping arms are connected through sliding shafts and telescopic shafts.

10. A clamping device according to claim 9, characterized in that: It also comprises a telescopic power member (22), one end of the telescopic power member (22) being rotatably disposed on the upper rotating shaft (6), and the other end of the telescopic power member (22) being rotatably disposed on the main rotating shaft (3).

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