CN219906702U - Hoisting tool for roll collar - Google Patents

Abstract

The utility model discloses a lifting tool for a roll collar, which relates to the technical field of rolling, and comprises: a bracket having a first mounting portion and a second mounting portion disposed opposite to each other with a spacing distance; the clamping mechanism can clamp the roll collar and is connected with the first installation part and the second installation part through a first rotating shaft and a second rotating shaft respectively, so that the clamping mechanism can rotate around the first rotating shaft and the second rotating shaft; the clamping mechanism angle adjusting mechanism comprises an adjusting plate fixedly arranged on the clamping mechanism; the adjusting piece is arranged on the bracket, a locking state and an unlocking state are arranged between the adjusting piece and the adjusting plate, and the clamping mechanism and the bracket are kept fixed in the locking state; in the unlocking state, the clamping mechanism and the bracket can rotate. The utility model can realize the clamping and lifting of the roller rings with multiple mounting stations.

Description

Hoisting tool for roll collar

Technical Field

The utility model relates to the technical field of rolling, in particular to a lifting tool for a roll collar.

Background

In order to meet the technological requirements of hot-engine rolling in two-phase areas (780-830 ℃) such as 'low-temperature finish rolling', 'microalloying production' of a high-speed bar production line, rolling mill equipment in the high-speed area such as a modularized rolling mill, a cantilever rolling mill and the like needs to be continuously updated. The problem of carrying and lifting large-size roll collars is caused immediately, which causes the labor intensity of operators in production enterprises to be increased and causes some difficulties, and the clamping and lifting of the large-size roll collars with different diameter series and multiple installation stations are realized by means of special tools.

For example, an existing roll collar hoisting clamp comprises a first hoisting arm and a second hoisting arm which are mutually hinged to form an X shape, hoisting parts are formed at two opposite ends of the first hoisting arm and the second hoisting arm, the upper ends of the first hoisting arm and the second hoisting arm are connected through a first driving piece, first clamping parts which vertically extend downwards are respectively formed at the lower ends of the first hoisting arm and the second hoisting arm, two second clamping parts for clamping an inner ring of a roll collar workpiece are arranged between the two first clamping parts, and the two second clamping parts are respectively connected with the first hoisting arm and the second hoisting arm through two groups of second driving pieces. The roll collar hoisting clamp can balance the forces born by the inner ring and the outer ring of a roll collar workpiece, so that an unsintered roll collar blank cannot be damaged when being hoisted, but has the defects that a central spindle of a first hoisting arm and a central spindle of a second hoisting arm of the clamp is free of a supporting bearing seat, and roll collar hoisting of multiple stations cannot be realized; the lifting arm is not provided with a bearing, so that the rotation can not be realized, and the installation requirement of surrounding parts can not be met when the lifting arm rotates at a large angle.

Disclosure of Invention

In order to overcome the defects in the prior art, the technical problem to be solved by the embodiment of the utility model is to provide a lifting tool for the roll collar, which can realize the clamping and lifting of the roll collar with multiple mounting stations.

The specific technical scheme of the embodiment of the utility model is as follows:

a lifting tool for a roll collar, the lifting tool for a roll collar comprising:

a bracket having a first mounting portion and a second mounting portion disposed opposite to each other with a spacing distance;

the clamping mechanism can clamp the roll collar and is connected with the first installation part and the second installation part through a first rotating shaft and a second rotating shaft respectively, so that the clamping mechanism can rotate around the first rotating shaft and the second rotating shaft;

the clamping mechanism angle adjusting mechanism comprises an adjusting plate fixedly arranged on the clamping mechanism; the adjusting piece is arranged on the bracket, a locking state and an unlocking state are arranged between the adjusting piece and the adjusting plate, and the clamping mechanism and the bracket are kept fixed in the locking state; in the unlocking state, the clamping mechanism and the bracket can rotate.

Preferably, the adjusting plate is provided with a first chute, and the first chute is arc-shaped; the adjusting piece is screwed on the support and penetrates through the first sliding groove, one end of the adjusting piece is provided with an operating part, the other end of the adjusting piece is provided with a limiting part extending along the radial direction of the adjusting piece, and the limiting part can abut against the side wall of the adjusting plate so that the clamping mechanism and the support can be kept fixed.

Preferably, the central angle of the first chute is at least 90 degrees or more.

Preferably, the clamping mechanism comprises: the rotary table comprises a supporting disc, a rotary table, a bearing arranged between the supporting disc and the rotary table and a clamping opening degree adjusting mechanism, wherein the supporting disc and the rotary table can rotate relatively, a connecting plate is connected to the supporting disc, and the connecting plate is connected with the first installation part and the second installation part through the first rotating shaft and the second rotating shaft respectively; the clamping opening adjusting mechanism is installed and connected to the rotary table.

Preferably, the turntable is mounted within the support tray; the clamping mechanism further comprises: and the gland is arranged at the upper end of the supporting disc, and limits the bearing and the turntable in the supporting disc.

Preferably, the turntable is provided with an opening, and mounting seats are arranged on two sides of the opening;

the clamping opening degree adjusting mechanism comprises: the first connecting rod and the second connecting rod are arranged in an X shape, and the length of the first connecting rod and the length of the second connecting rod can be adjusted by stretching, a second rotating shaft is arranged at the cross point of the first connecting rod and the second connecting rod in a penetrating way so that the first connecting rod and the second connecting rod can rotate around the second rotating shaft, and the second rotating shaft is arranged in the mounting seat in a penetrating way; and two ends of the adjusting mechanism are respectively hinged with the upper ends of the first connecting rod and the second connecting rod.

Preferably, the adjusting mechanism includes: the device comprises a first connecting piece, a second connecting piece and an adjusting piece; one end of the first connecting piece is hinged with the upper end of the first connecting rod; one end of the second connecting piece is hinged with the upper end of the second connecting rod; and two ends of the adjusting piece are respectively in threaded connection with the other end of the first connecting piece and the other end of the second connecting piece.

Preferably, the clamping mechanism further comprises: the first clamping piece is arranged at the lower end of the first connecting rod, and the second clamping piece is arranged at the lower end of the second connecting rod, and the first clamping piece are oppositely arranged to clamp the roll collar; the first clamping piece and the second clamping piece are used for clamping one side of the roll collar, and a friction enhancing gasket is arranged on the side of the roll collar.

Preferably, the friction coefficient of the friction enhancing gasket under the oiling condition is greater than or equal to 0.25.

Preferably, the lower end of the first clamping piece is provided with a second sliding groove extending along the opening direction of the clamping opening adjusting mechanism, and the lower end of the second clamping piece is provided with a third sliding groove extending along the opening direction of the clamping opening adjusting mechanism;

the clamping mechanism further comprises: one end of the guard plate is connected with the second chute of the first clamping piece in a matched mode through a sliding shaft, and the other end of the guard plate is connected with the third chute of the second clamping piece in a matched mode through a sliding shaft; when the clamping mechanism clamps the roll collar, the guard plate is positioned below the roll collar; the upper surface of backplate is provided with the cover body of being made by nylon.

The technical scheme of the utility model has the following remarkable beneficial effects:

according to the lifting tool for the roll collars, the clamping mechanism and the support can rotate through the angle adjusting mechanism of the clamping mechanism, so that the roll collars of the installation stations with different angles can be safely clamped and transported. Meanwhile, the supporting disc, the rotary disc and the bearing arranged between the supporting disc and the rotary disc in the clamping mechanism are utilized to realize 360-degree rotation between the clamping opening adjusting mechanism and the support, and the roller collar clamped at the lower end of the clamping opening adjusting mechanism can avoid parts such as a roller box panel cooling water pipe and a guide through rotation, so that the working efficiency is improved. Finally, the guard plate is utilized to realize the safety protection of the roll collar, so that the personal danger of operators caused by falling of the clamped workpiece (roll collar) is avoided, and the equipment is prevented from being damaged by falling of the clamped workpiece; in addition, be provided with friction enhancement liner on the backplate, the scratch to the collar surface that significantly reduces under the prerequisite of guaranteeing firmly holding the collar.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be.

FIG. 1 is a schematic perspective view of a lifting tool for a roll collar according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a support disk, turntable and bearing in an embodiment of the utility model;

FIG. 3 is a schematic view of a lifting tool for a roll collar in a 90 degree station in an embodiment of the present utility model;

FIG. 4 is a schematic view of a lifting tool for a roll collar in a 0 degree station in an embodiment of the present utility model;

FIG. 5 is a schematic view of a lifting tool for a roll collar in a 45 degree station in an embodiment of the present utility model.

Reference numerals of the above drawings:

1. a bracket; 11. a first mounting portion; 12. a second mounting portion; 2. a first rotating shaft; 3. an adjusting plate; 31. a first chute; 4. an adjusting member; 41. an operation unit; 42. a limit part; 5. a clamping mechanism; 51. a support plate; 511. a connecting plate; 52. a turntable; 521. a mounting base; 53. a bearing; 54. a clamping opening adjusting mechanism; 541. a first link; 542. a second link; 543. an adjusting mechanism; 544. a second rotating shaft; 55. a first clamping member; 551. a second chute; 56. a second clamping member; 561. a third chute; 57. a friction enhancing liner; 58. a guard board; 581. a sleeve body; 582. a sliding shaft; 59. a gland; 6. a roll collar; 7. and (5) a taper sleeve.

Detailed Description

The details of the utility model will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the utility model. However, the specific embodiments of the utility model described herein are for the purpose of illustration only and are not to be construed as limiting the utility model in any way. Given the teachings of the present utility model, one of ordinary skill in the related art will contemplate any possible modification based on the present utility model, and such should be considered to be within the scope of the present utility model. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, may be in communication with each other in two elements, may be directly connected, or may be indirectly connected through an intermediary, and the specific meaning of the terms may be understood by those of ordinary skill in the art in view of the specific circumstances. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In order to achieve clamping and lifting of the roll collar 6 with multiple mounting stations, a lifting tool for roll collars is provided in the present utility model, fig. 1 is a schematic perspective view of a lifting tool for roll collars according to an embodiment of the present utility model, and as shown in fig. 1, the lifting tool for roll collars may include: a bracket 1 having a first mounting portion 11 and a second mounting portion 12 disposed opposite to each other with a spacing distance; a clamping mechanism 5 capable of clamping the roller ring 6, which is connected to the first mounting portion 11 and the second mounting portion 12 through the first rotating shaft 2 and the second rotating shaft 544, respectively, so that the clamping mechanism 5 can rotate around the first rotating shaft 2 and the second rotating shaft 544; the clamping mechanism 5 angle adjusting mechanism 543, which comprises an adjusting plate 3 fixedly mounted on the clamping mechanism 5; an adjusting member 4 mounted on the bracket 1, wherein a locking state and an unlocking state are provided between the adjusting member 4 and the adjusting plate 3, and in the locking state, the clamping mechanism 5 and the bracket 1 are kept fixed; in the unlocked state, the clamping mechanism 5 and the bracket 1 can rotate.

As shown in fig. 1, the bracket 1 is mainly used for heavy weight, and its upper part can be connected with other parts, thereby lifting and moving the entire lifting tool. The bracket 1 has a first mounting portion 11 and a second mounting portion 12 disposed opposite to each other with a spacing distance. The first mounting portion 11 and the second mounting portion 12 are arranged therebetween for accommodating the clamping mechanism 5. The first mounting portion 11 and the second mounting portion 12 are disposed opposite to each other.

As shown in fig. 1, the clamping mechanism 5 is used for clamping the roll collar 6. The clamping mechanism 5 is mounted at a first mounting portion 11 and a second mounting portion 12. The clamping mechanism 5 is connected to the first mounting portion 11 and the second mounting portion 12 through the first rotation shaft 2 and the second rotation shaft 544, respectively, so that the clamping mechanism 5 can rotate around the first rotation shaft 2 and the second rotation shaft 544. The first rotation axis 2 and the second rotation axis 544 are on the same line. The gripping mechanism 5 is rotatable about the line.

As shown in fig. 1, the clamping mechanism 5 angle adjustment mechanism 543 may include an adjustment plate 3 fixedly mounted on the clamping mechanism 5, and an adjustment member 4 mounted on the bracket 1. The adjusting piece 4 and the adjusting plate 3 are in a locking state and an unlocking state, and in the locking state, the clamping mechanism 5 and the bracket 1 are kept fixed; in the unlocked state, the clamping mechanism 5 and the bracket 1 can rotate, so that the clamping mechanism 5 can have various stations relative to the bracket 1.

As shown in fig. 1, the adjusting plate 3 has a first slide groove 31, and the first slide groove 31 is arcuate. The first chute 31 extends around a straight line where the first rotating shaft 2 and the second rotating shaft 544 are located. The adjusting element 4 can be screwed onto the support 1 and pass through the first slot 31. One end of the adjusting member 4 has an operating portion 41 for an operator to screw the adjusting member 4. The other end of the adjusting member 4 is provided with a limiting part 42 extending along the radial direction, and the limiting part 42 can be propped against the side wall of the adjusting plate 3, so that the friction force between the limiting part 42 and the adjusting plate 3 is increased, and the clamping mechanism 5 and the bracket 1 are kept fixed.

Further, the central angle of the first chute 31 is at least 90 degrees or more. Fig. 3 is a schematic view of a lifting tool for a roll collar in a 90 degree station in an embodiment of the present utility model, fig. 4 is a schematic view of a lifting tool for a roll collar in a 0 degree station in an embodiment of the present utility model, and fig. 5 is a schematic view of a lifting tool for a roll collar in a 45 degree station in an embodiment of the present utility model, as shown in fig. 3 to 5, according to a position of an adjusting member 4 in a first chute 31, the lifting tool for a roll collar may have a plurality of stations with different angles, and after the lifting tool is adjusted to the corresponding station, the adjusting member 4 is screwed, so that a locking state between an adjusting plate 3 and a bracket 1 is maintained at the station. Under different stations, the clamping mechanism 5 and the clamped roll collar 6 have different angles with the vertical direction, so that different mounting stations of the roll collar 6 are met.

Fig. 2 is a cross-sectional view of an embodiment of the present utility model at a support disc, turntable 52 and bearing 53, as shown in fig. 1 and 2, the clamping mechanism 5 may comprise: a support plate 51, a turntable 52, a bearing 53 provided between the support plate 51 and the turntable 52, and a clamp opening degree adjusting mechanism 54. The support disc 51 and the turntable 52 are rotatable relative to each other. The support plate 51 is generally annular, and the turntable 52 is disposed within the support plate 51 while the inner extension of the support plate 51 supports and butts against the support plate 51. The clamping mechanism 5 further comprises: the gland 59 is arranged at the upper end of the support disc 51, and the gland 59 limits the bearing 53 and the turntable 52 in the support disc 51. The gland 59 and the support disc 51 may be connected together by screws.

As shown in fig. 1, two connection plates 511 are connected to both sides of the support plate 51, respectively, and the two connection plates 511 are connected to the first mounting portion 11 and the second mounting portion 12 through the first rotation shaft 2 and the second rotation shaft 544, respectively. The clamp opening adjusting mechanism 54 is attached to the turntable 52. The adjusting plate 3 can be mounted on the connecting plate 511, and the two can be only required to ensure that the adjusting plate cannot rotate.

With the above structure, since the clamping opening adjusting mechanism 54 is mounted and connected to the turntable 52, the turntable 52 and the support plate 51 can rotate about a straight line in the vertical direction, that is, the clamping opening adjusting mechanism 54 can rotate about a straight line in the vertical direction with respect to the bracket 1, and the roller ring 6 is clamped on the clamping opening adjusting mechanism 54. 360-degree rotation can be realized between the rotary table 52 and the supporting plate 51 in the hoisting tool, and parts such as a cooling water pipe and a guide of a roller box panel can be avoided through rotation.

In one specific embodiment, the turntable 52 has an opening therein, and the turntable 52 mounts the mounting bases 521 on either side of the opening. The clamp opening adjusting mechanism 54 may include: the first link 541 and the second link 542 each having an X-shape are provided, and the length of the first link is adjustable 543. The second rotation shaft 544 is penetrated at the crossing point of the first and second links 541 and 542 such that the first and second links 541 and 542 can rotate about the second rotation shaft 544, and the second rotation shaft 544 is penetrated in the mounting seat 521. In this way, the distance between the ends of the first and second links 541 and 542 can be adjusted according to the angle between the first and second links 541 and 542, so that the lower ends of the first and second links 541 and 542 can be opened to allow the roll collar 6 to enter and then contracted to clamp the roll collar 6. Both ends of the adjusting mechanism 543 are hinged to the upper ends of the first link 541 and the second link 542, respectively, and the expansion and contraction of the lower ends of the first link 541 and the second link 542 are adjusted by the expansion and contraction of the adjusting mechanism 543.

For example, as shown in fig. 1, the adjusting mechanism 543 includes: a first connector, a second connector and an adjusting member 4; one end of the first link is hinged with the upper end of the first link 541; one end of the second connecting member is hinged with the upper end of the second connecting rod 542; the two ends of the adjusting piece 4 are respectively connected with the other end of the first connecting piece and the other end of the second connecting piece in a threaded manner. The screw threads at the two ends of the adjusting member 4 are opposite in direction, so that the first connecting member and the second connecting member can move in opposite directions or move in opposite directions by rotating the adjusting member 4, thereby realizing the expansion and contraction of the adjusting mechanism 543.

As shown in fig. 1, the clamping mechanism 5 may further include: the first clamping member 55 is mounted at the lower end of the first link 541 and the second clamping member 56 is mounted at the lower end of the second link 542, the first clamping member 55 and the first clamping member 55 being disposed opposite to each other to clamp the roll collar 6. The first and second clamping members 55 and 56 are provided with friction enhancing pads 57 on one side for clamping the roll collar 6, thereby increasing the friction force of the first and second clamping members 55 and 56 against the clamping roll collar 6. The friction enhancing lining 57 may be made of a highly wear resistant material. The friction enhancing liner 57 may have a maximum coefficient of friction of 0.6 to 0.65. In addition, the friction enhancing liner 57 has a coefficient of friction of 0.25 or more under oiled conditions. As a practical matter, the wear resistant material hardness HD of the friction enhancing liner 57 may be between 45 and 60, less than the hardness of the collar 6, thereby reducing scratching of the surface of the collar 6.

As a practical matter, as shown in fig. 1, the lower end of the first clamping member 55 is provided with a second sliding groove 551 extending in the opening direction of the clamping opening adjusting mechanism 54, and the lower end of the second clamping member 56 is provided with a third sliding groove 561 extending in the opening direction of the clamping opening adjusting mechanism 54. The clamping mechanism 5 may comprise: the guard plate 58, one end of the guard plate 58 is connected with the second sliding groove 551 of the first clamping member 55 in a matching way through a sliding shaft 582, and the other end of the guard plate 58 is connected with the third sliding groove 561 of the second clamping member 56 in a matching way through the sliding shaft 582. The slide shaft 582 connected to the cover 58 is movable in the first slide groove 31 and the second slide groove 551 so as to satisfy the change in the time interval in which the lower ends of the first and second holders 55 and 56 can be opened and contracted. When the clamping mechanism 5 clamps the roll collar 6, the shield 58 is positioned below the roll collar 6. As a practical matter, when the clamping mechanism 5 clamps the roll collar 6, the roll collar 6 may be provided with a taper sleeve 7, which is an indirectly clamped workpiece, and the taper sleeve 7 is located at the upper end face of the roll collar 6. When the upper surface of the shield 58 is provided with a sleeve 581 made of nylon. The guard plate 58 is used for protecting the roller ring 6 clamped by the clamping mechanism 5, so that the falling possibility and damage caused by falling are reduced.

According to the lifting tool for the roll collars, the clamping mechanism 5 and the bracket 1 can rotate through the angle adjusting mechanism 543 of the clamping mechanism 5, so that the roll collars 6 of the installation stations with different angles can be safely clamped and transported. Meanwhile, by using the supporting disc 51, the rotary disc 52 and the bearing 53 arranged between the supporting disc 51 and the rotary disc 52 in the clamping mechanism 5, 360-degree rotation between the clamping opening adjusting mechanism 54 and the bracket 1 is realized, and the roller ring 6 clamped at the lower end of the clamping opening adjusting mechanism 54 can avoid parts such as a roller box panel cooling water pipe and a guide through rotation, so that the working efficiency is improved. Finally, the guard plate 58 is utilized to realize the safety protection of the roll collar 6, so that the personnel danger of operators caused by falling of the clamped workpiece (roll collar 6) is avoided, and the equipment is prevented from being damaged due to falling of the clamped workpiece; in addition, the friction enhancing gasket 57 is arranged on the guard plate 58, so that the scratch on the surface of the roll collar 6 is greatly reduced on the premise of ensuring that the roll collar 6 is firmly clamped.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

The foregoing is merely a few embodiments of the present utility model, and the embodiments disclosed in the present utility model are merely examples which are used for the convenience of understanding the present utility model and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail of the embodiments without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims (10)

1. A lifting device for collar, its characterized in that, a lifting device for collar includes:

a bracket having a first mounting portion and a second mounting portion disposed opposite to each other with a spacing distance;

the clamping mechanism can clamp the roll collar and is connected with the first installation part and the second installation part through a first rotating shaft and a second rotating shaft respectively, so that the clamping mechanism can rotate around the first rotating shaft and the second rotating shaft;

the clamping mechanism angle adjusting mechanism comprises an adjusting plate fixedly arranged on the clamping mechanism; the adjusting piece is arranged on the bracket, a locking state and an unlocking state are arranged between the adjusting piece and the adjusting plate, and the clamping mechanism and the bracket are kept fixed in the locking state; in the unlocking state, the clamping mechanism and the bracket can rotate.

2. The lifting tool for the roll collar according to claim 1, wherein the adjusting plate is provided with a first chute, and the first chute is arc-shaped; the adjusting piece is screwed on the support and penetrates through the first sliding groove, one end of the adjusting piece is provided with an operating part, the other end of the adjusting piece is provided with a limiting part extending along the radial direction of the adjusting piece, and the limiting part can abut against the side wall of the adjusting plate so that the clamping mechanism and the support can be kept fixed.

3. The lifting tool for roll collars according to claim 2, wherein the central angle of the first chute is at least 90 degrees or more.

4. The lifting tool for roll collars of claim 1, wherein the clamping mechanism comprises: the rotary table comprises a supporting disc, a rotary table, a bearing arranged between the supporting disc and the rotary table and a clamping opening degree adjusting mechanism, wherein the supporting disc and the rotary table can rotate relatively, a connecting plate is connected to the supporting disc, and the connecting plate is connected with the first installation part and the second installation part through the first rotating shaft and the second rotating shaft respectively; the clamping opening adjusting mechanism is installed and connected to the rotary table.

5. The lifting tool for roll collars of claim 4, wherein said turntable is mounted within said support plate; the clamping mechanism further comprises: and the gland is arranged at the upper end of the supporting disc, and limits the bearing and the turntable in the supporting disc.

6. The lifting tool for roll collars according to claim 4, wherein the turntable has an opening, and the turntable is provided with mounting seats at both sides of the opening;

the clamping opening degree adjusting mechanism comprises: the first connecting rod and the second connecting rod are arranged in an X shape, and the length of the first connecting rod and the length of the second connecting rod can be adjusted by stretching, a second rotating shaft is arranged at the cross point of the first connecting rod and the second connecting rod in a penetrating way so that the first connecting rod and the second connecting rod can rotate around the second rotating shaft, and the second rotating shaft is arranged in the mounting seat in a penetrating way; and two ends of the adjusting mechanism are respectively hinged with the upper ends of the first connecting rod and the second connecting rod.

7. The lifting tool for roll collars of claim 6, wherein the adjustment mechanism comprises: the device comprises a first connecting piece, a second connecting piece and an adjusting piece; one end of the first connecting piece is hinged with the upper end of the first connecting rod; one end of the second connecting piece is hinged with the upper end of the second connecting rod; and two ends of the adjusting piece are respectively in threaded connection with the other end of the first connecting piece and the other end of the second connecting piece.

8. The lifting tool for roll collars of claim 6, wherein the clamping mechanism further comprises: the first clamping piece is arranged at the lower end of the first connecting rod, and the second clamping piece is arranged at the lower end of the second connecting rod, and the first clamping piece are oppositely arranged to clamp the roll collar; the first clamping piece and the second clamping piece are used for clamping one side of the roll collar, and a friction enhancing gasket is arranged on the side of the roll collar.

9. The lifting tool for roll collars according to claim 8, wherein the friction coefficient of the friction enhancing pad under the oil coating condition is 0.25 or more.

10. The lifting tool for the roll collar according to claim 8, wherein a second sliding groove extending along the opening direction of the clamping opening adjusting mechanism is formed in the lower end of the first clamping piece, and a third sliding groove extending along the opening direction of the clamping opening adjusting mechanism is formed in the lower end of the second clamping piece;

the clamping mechanism further comprises: one end of the guard plate is connected with the second chute of the first clamping piece in a matched mode through a sliding shaft, and the other end of the guard plate is connected with the third chute of the second clamping piece in a matched mode through a sliding shaft; when the clamping mechanism clamps the roll collar, the guard plate is positioned below the roll collar; the upper surface of backplate is provided with the cover body of being made by nylon.