CN210736004U

CN210736004U - Grabbing hand and multi-pipe-piece crane comprising same

Info

Publication number: CN210736004U
Application number: CN201921418337.9U
Authority: CN
Inventors: 李磊
Original assignee: China Railway Engineering Equipment Group Technology Service Co Ltd
Current assignee: China Railway Engineering Equipment Group Technology Service Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-06-12
Anticipated expiration: 2029-08-29

Abstract

The utility model relates to the technical field of shield construction, in particular to a grabbing hand, which comprises a grabbing hand bracket, wherein a first-stage grabbing arm of a multi-stage grabbing arm is arranged at the lower end of the grabbing hand bracket, and adjacent grabbing arms are hinged; the first adjusting assembly is arranged between the adjacent grabbing arms so as to adjust the next-stage grabbing arm to fold or extend relative to the previous-stage grabbing arm; the bracket is arranged on the inner end surface of the grabbing arm, and the bracket on the grabbing arm below the first-stage grabbing arm is a rotating bracket; the second adjusting component is arranged on the grabbing arm so as to adjust the rotary bracket to protrude or not protrude the inner end surface of the grabbing arm; the multi-pipe-slice crane comprises a travelling mechanism and a grabbing mechanism, wherein the grabbing mechanism is hung on the lower portion of the travelling mechanism and comprises a grabbing support, an adjusting oil cylinder and a grabbing hand, the grabbing hand is hinged to the grabbing support, and the adjusting oil cylinder is arranged between the grabbing support and the grabbing hand. This patent has avoided transporting the inefficiency that causes repeatedly and the section of jurisdiction problem of colliding with.

Description

Grabbing hand and multi-pipe-piece crane comprising same

Technical Field

The utility model relates to a shield constructs quick-witted underground space construction technical field, concretely relates to snatch hand and contain multitube piece loop wheel machine who snatchs hand.

Background

With the continuous increase of the scale and the strength of national infrastructure, various overground and underground construction projects and major traffic roads of railways, highways and subways are operated successively. The construction progress and the construction period of the project are the key points of social attention and the guarantee of rapid development of an area. The shield machine is used as a main large-scale engineering machine of the type of engineering, the efficiency is higher compared with the traditional construction mode, the transportation link of the duct piece is a node link in the whole shield machine construction process, the construction efficiency can be directly influenced, and the construction period is further influenced. General section of jurisdiction loop wheel machine can only transfer a section of jurisdiction at every turn, perhaps transfers three, then once transports with secondary loop wheel machine, wastes time and energy, restricts the time limit for a project, and snatchs the in-process and extremely easily cause and rock, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the problem that above-mentioned exists with not enough, provide one kind and snatch the hand and contain the multitube piece loop wheel machine who snatchs the hand, can transport the section of jurisdiction fast, avoided transporting repeatedly the inefficiency that causes and the section of jurisdiction problem of colliding with, in addition, the phenomenon of rocking in the transportation has still been avoided to this patent, and the security is high.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that:

a grabbing hand comprises a grabbing hand support, a plurality of stages of grabbing arms, a first adjusting assembly, a bracket and a second adjusting assembly, wherein the first-stage grabbing arm at the uppermost end of each of the plurality of stages of grabbing arms is fixedly connected to the lower end of the grabbing hand support, and adjacent grabbing arms are hinged; the first adjusting assembly is arranged between the adjacent grabbing arms and used for adjusting the next-stage grabbing arm to fold or extend relative to the previous-stage grabbing arm; the bracket is arranged on the inner end surface of the grabbing arm, the bracket on the first-stage grabbing arm is a fixed bracket or a rotating bracket, and the bracket on the grabbing arm below the first-stage grabbing arm is a rotating bracket; the second adjusting assembly is arranged on the grabbing arm and used for adjusting the rotary bracket to protrude or not protrude the inner end face of the grabbing arm.

According to the grabbing hand, the first adjusting assembly comprises a connecting rod and a rotating oil cylinder, the connecting rod is arranged on the side face of the grabbing arm at the upper stage, one end of the rotating oil cylinder is hinged with the free end of the connecting rod, and the other end of the rotating oil cylinder is hinged with the side face of the grabbing arm at the lower stage; the second adjusting part comprises an adjusting oil cylinder and a mounting groove arranged on the grabbing arm, the rotating bracket is hinged to the inner upper portion of the mounting groove, two ends of the adjusting oil cylinder are hinged to the rotating bracket respectively and the inner lower portion of the mounting groove, and the adjusting oil cylinder can control the rotating bracket to rotate inwards when stretching out and drawing back the mounting groove or outwards rotate to the mounting groove.

A multi-pipe-slice crane comprises a travelling mechanism and a grabbing mechanism, wherein the travelling mechanism reciprocates on a travelling track, and the travelling track is used for supporting the movement of the multi-pipe-slice crane; the grabbing mechanism is hung on the lower portion of the travelling mechanism and can move up and down relatively to the travelling mechanism, the grabbing mechanism comprises a grabbing support, an adjusting oil cylinder and any one of the grabbing hands, the grabbing hands are connected to the grabbing support in a hinged mode, the adjusting oil cylinder is arranged between the grabbing support and the grabbing hands, and the adjusting oil cylinder is adjusted to control the grabbing hands to grab and place the duct piece.

According to the multi-pipe-piece crane, the walking mechanism comprises a walking main structure, a walking motor, a walking gear and a walking wheel matched with the walking track are arranged on the walking main structure, the walking motor is in transmission connection with the walking gear, and a gear strip in meshing connection with the gear is arranged on the inner side of the walking track; electric winches are arranged on two sides of the walking main structure, and lower ends of steel wire ropes of the electric winches are connected with lifting hooks.

According to a multitube piece loop wheel machine, it hangs through hanging the mechanism to snatch the running gear lower extreme, hang the mechanism and include supporting platform, last supporting shaft section of thick bamboo, rotating electrical machines and the initiative swing pinion of being equipped with of supporting platform, it is connected with passive swing pinion to snatch support upper portion, passive swing pinion rotates and sets up in the supporting shaft section of thick bamboo, the rotating electrical machines is connected with the transmission of initiative swing pinion, initiative swing pinion with the meshing of passive swing pinion is connected.

According to the multi-pipe-sheet crane, the grabbing mechanism is hung at the lower end of the traveling mechanism through the hanging mechanism, the hanging mechanism comprises a supporting platform, the grabbing mechanism is connected to the lower end of the supporting platform, the supporting platform is connected with the lifting hook, and a telescopic frame is further connected between the supporting platform and the main structure of the traveling machine.

According to the multi-pipe-piece crane, the expansion brackets are two folding expansion brackets connected between the supporting platform and the main structure of the walking machine, each folding expansion bracket is formed by hinging a plurality of groups of connecting rods in sequence through articulated shafts, and each group of connecting rods comprises two connecting rods.

According to the multi-pipe-piece crane, a supporting shaft barrel, a rotating motor and an active rotating gear are arranged on the supporting platform, a passive rotating gear is connected to the upper portion of the grabbing support, the passive rotating gear is rotatably arranged in the supporting shaft barrel, the rotating motor is in transmission connection with the active rotating gear, and the active rotating gear is in meshing connection with the passive rotating gear.

According to the multi-pipe-piece crane, two grabbing hands are respectively arranged on two sides of the grabbing support, the upper parts of the grabbing hand supports of the two grabbing hands on the same side are connected through a cross rod, one end of the adjusting oil cylinder is hinged to the cross rod, and the other end of the adjusting oil cylinder is hinged to the grabbing support.

The utility model discloses a beneficial effect of multitube piece loop wheel machine and allocation and transportation method:

1. the utility model discloses a gripper is through setting up at least one-level folding gripping arm at gripper support lower extreme, and set up the bracket on gripper support, set up the rotatory bracket on gripper arm, make gripper can conveniently align with the hoist and mount position of a plurality of sections of jurisdiction in proper order, loop through bracket and rotatory bracket simultaneously and hold up a plurality of sections of jurisdiction, realize gripper can once step by step grip a plurality of sections of jurisdiction and once put down the effect of a plurality of sections of jurisdiction step by step, it is efficient to grip and put down, it is firm to grip;

2. the utility model discloses a multitube piece loop wheel machine snatchs the mechanism rotation through rotating electrical machines control, snatchs mechanism walking and lift through running gear control, can make things convenient for once substep to snatch a plurality of sections of jurisdiction through snatching the hand to can transport a plurality of sections of jurisdiction fast, avoided transporting repeatedly the inefficiency that causes and the section of jurisdiction problem of colliding with, in addition, this patent sets up the expansion bracket between walking main structure and supporting platform, has still avoided the phenomenon of rocking in the transportation, and the security is high.

Drawings

Fig. 1 shows an overall structure schematic diagram of a multi-pipe-slice crane according to an embodiment of the present invention.

Fig. 2 shows a schematic structural diagram of a traveling mechanism according to an embodiment of the present invention.

Fig. 3 shows a schematic structural diagram of a suspension mechanism according to an embodiment of the present invention.

Fig. 4 shows a schematic structural diagram of a grabbing mechanism according to an embodiment of the present invention.

Fig. 5 shows a schematic structural diagram of a grasping hand according to an embodiment of the present invention.

In the figure: 1 is a walking track, 2 is a walking mechanism, 3 is a suspension mechanism, 4 is a grabbing mechanism, 2-1 is a walking main structure, 2-2 is a walking wheel, 2-3 is an electric winch, 2-4 steel wire ropes, 2-5 is a lifting hook, 2-6 is a walking motor and a walking gear, 3-1 is a telescopic frame, 3-2 is a rotating motor, 3-3 is a supporting platform, 3-4 is a driving rotating gear, 3-5 is a supporting shaft barrel, 4-1 is a driven rotating gear, 4-2 is a grabbing bracket, 4-3 is a grabbing hand, 4-4 is an adjusting oil cylinder, 4-3-1 is a grabbing hand bracket, 4-3-2 is a fixed bracket, 4-3-3 is a second rotating oil cylinder, 4-3-4 is a rotating bracket, 4-3-5 is an adjusting oil cylinder, 4-3-6 is a third-stage grabbing arm, 4-3-7 is an adjusting oil cylinder, 4-3-8 is a rotating bracket, 4-3-9 is a second-stage grabbing arm, 4-3-10 is a first rotating oil cylinder, 4-3-11 is a first connecting rod, 4-3-12 is a second connecting rod, and 4-3-13 is a first-stage grabbing arm.

Detailed Description

The multi-pipe crane and the dispatching method of the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 5, the embodiment discloses a gripper 4-3, which is characterized by comprising a gripper bracket 4-3-1, a plurality of stages of gripper arms, a first adjusting assembly, a bracket and a second adjusting assembly, wherein the uppermost first stage of gripper arm 4-3-13 of each stage of gripper arm is fixedly connected to the lower end of the gripper bracket 4-3-1, and adjacent gripper arms are hinged; the first adjusting assembly is arranged between the adjacent grabbing arms and used for adjusting the next-stage grabbing arm to fold or extend relative to the previous-stage grabbing arm; the bracket is arranged on the inner end surface of the grabbing arm, the bracket on the first-stage grabbing arm is a fixed bracket or a rotating bracket, and the brackets on the grabbing arm below the first-stage grabbing arm are rotating brackets 4-3-4 and 4-3-8; the second adjusting component is arranged on the grabbing arm and used for adjusting the protruding or non-protruding inner end face of the grabbing arm of the rotating bracket.

The first adjusting assembly comprises connecting rods 4-3-11 and 4-3-12 and rotating oil cylinders 4-3-10 and 4-3-3, wherein the connecting rods are arranged on the side surface of the grabbing arm at the upper stage, one end of each rotating oil cylinder is hinged with the free end of each connecting rod, and the other end of each rotating oil cylinder is hinged with the side surface of the grabbing arm at the lower stage; the second adjusting assembly comprises an adjusting oil cylinder and a mounting groove arranged on the grabbing arm, the rotary brackets 4-3-4 and 4-3-8 are hinged to the inner upper part of the mounting groove, two ends of the adjusting oil cylinders 4-3-5 and 4-3-7 are hinged to the rotary brackets 4-3-4 and 4-3-8 and the inner lower part of the mounting groove respectively, and the adjusting oil cylinders 4-3-5 and 4-3-7 can control the rotary brackets 4-3-4 and 4-3-8 to rotate inwards out of the mounting groove or outwards to rotate into the mounting groove when stretching.

Specifically, the lower end of the grabbing hand support 4-3-1 in this embodiment is provided with three stages of grabbing arms, namely a first-stage grabbing arm 4-3-13, a second-stage grabbing arm 4-3-9 and a third-stage grabbing arm 4-3-6, the upper portion of the left side surface of the first-stage grabbing arm 4-3-13 is connected with a first connecting rod 4-3-11, the second-stage grabbing arm 4-3-9 is hinged to the lower end of the grabbing hand support 4-3-1, the upper portion of the right side surface of the second-stage grabbing arm is provided with a second connecting rod 4-3-12, the upper portion of the left side surface of the second-stage grabbing arm and the end portion of the first connecting rod 4-3-11 are hinged to two ends of a first rotating oil cylinder 4-3-10, and the first rotating oil cylinder 4-3-10 is adjusted to control the second-stage grabbing arm 4-3- Stretching; the third-stage grabbing arm 4-3-6 is hinged to the lower end of the second-stage grabbing arm 4-3-9, the upper part of the right side face of the third-stage grabbing arm and the end part of the second connecting rod 4-3-12 are hinged to two ends of the second rotating oil cylinder 4-3-3 respectively, and the third-stage grabbing arm 4-3-6 can be controlled to be folded or extended relative to the second-stage grabbing arm 4-3-9 by adjusting the second rotating oil cylinder 4-3-3; in the embodiment, the bracket connected to the inner end face of the first-stage grabbing arm 4-3-13 is a fixed bracket 4-3-2, the second-stage grabbing arm 4-3-9 and the third-stage grabbing arm 4-3-6 are respectively provided with a mounting groove, the rotary bracket 4-3-8 is hinged to the inner upper part of the mounting groove on the second-stage grabbing arm 4-3-9, two ends of the adjusting oil cylinder 4-3-7 are respectively hinged to the rotary bracket 4-3-8 and the inner lower part of the mounting groove, and the rotating bracket 4-3-8 can be controlled to rotate inwards out of the mounting groove or outwards into the mounting groove when the adjusting oil cylinder 4-3-7 stretches; the rotary bracket 4-3-4 is hinged to the inner upper part of the mounting groove of the third-stage grabbing arm 4-3-6, two ends of the adjusting oil cylinder 4-3-5 are hinged to the rotary bracket 4-3-4 and the inner lower part of the mounting groove respectively, and the adjusting oil cylinder 4-3-5 can control the rotary bracket 4-3-4 to rotate inwards out of the mounting groove or rotate outwards into the mounting groove when stretching. Of course, in other embodiments (not shown in the figures), the rotating bracket may be hinged to the side surface of the grabbing arm, and the adjusting cylinder is hinged to the connecting rod on the side surface of the grabbing arm, and drives the rotating bracket to rotate towards the inner end surface of the grabbing arm and protrude out of the inner end surface of the grabbing arm. In another embodiment, the rotating bracket can also be arranged in a slide way of the grabbing arm in a sliding way, then one end of the lever is connected with one end of the rotating bracket in a sliding way, and the other end of the lever is driven to move by the adjusting oil cylinder.

Referring to fig. 1-5, the embodiment further discloses a multi-segment crane, which includes a traveling mechanism 2 and a grabbing mechanism 4, wherein the traveling mechanism 2 reciprocates on a traveling rail 1, the traveling rail 1 is used for supporting the movement of the multi-segment crane, the whole grabbing mechanism is suspended below the traveling mechanism, moves along with the traveling of the traveling mechanism, and is used for grabbing segment and transporting the segment to a designated position under the driving of the traveling mechanism; the grabbing mechanism 4 is hung on the lower portion of the traveling mechanism 2 and can move up and down relative to the traveling mechanism 2, the grabbing mechanism 4 comprises a grabbing support 4-2, an adjusting oil cylinder 4-4 and a grabbing hand 4-3 described above, the grabbing hand 4-3 is hinged to the grabbing support 4-2, the adjusting oil cylinder 4-4 is arranged between the grabbing support 4-2 and the grabbing hand 4-3, and the grabbing and placing of the grabbing hand 4-3 on the segment can be controlled by adjusting the adjusting oil cylinder 4-4. In this embodiment, preferably, two grabbing hands 4-3 are respectively arranged on two sides of the grabbing bracket 4-2, the upper parts of the grabbing hand brackets 4-3-1 of the two grabbing hands 4-3 on the same side are connected through a cross bar, one end of the adjusting oil cylinder is hinged with the cross bar, and the other end of the adjusting oil cylinder is hinged with the grabbing bracket. Therefore, the movement of four grabbing hands at two sides can be controlled through two adjusting oil cylinders, and the oil cylinders are saved.

In the embodiment, specifically, the traveling mechanism 2 comprises a main traveling structure 2-1, a traveling motor and a traveling gear 2-6 are arranged on the main traveling structure 2-1, two traveling wheels 2-2 are respectively arranged on two sides of the main traveling structure and are matched with the traveling track 1, the traveling motor is in transmission connection with the traveling gear, and a gear strip in meshing connection with the traveling gear is arranged on the inner side of the traveling track 1; two sides of the main walking structure 5-1 are respectively provided with two electric winches 2-3, and the lower ends of steel wire ropes of the electric winches 2-3 are connected with lifting hooks 2-5. When the travelling wheels 2-2 roll on the travelling track 1 to travel, the travelling mechanism 2 is driven to move, the small electric winches 2-3 are integrally and uniformly arranged on two sides of the travelling main structure 2-1, the lifting hooks 2-5 are driven by the steel wire ropes 2-4, the hanging mechanism 3 is contracted up and down, and the grabbing mechanism 4 is driven to move up and down. The walking motor and the walking gears 2-6 are meshed with the gear bars of the walking track 1 to push the whole mechanism to walk on the walking track 1.

In this embodiment, preferably, the grabbing mechanism 4 is suspended at the lower end of the traveling mechanism 2 through the suspension mechanism 3, the suspension mechanism 3 includes a supporting platform 3-3, the supporting platform 3-3 is used for suspending the whole grabbing mechanism 4, a supporting shaft cylinder 3-5, a rotating motor 3-2 and an active rotating gear 3-4 are arranged on the supporting platform 3-3, the upper portion of the grabbing bracket 4-2 is connected with the passive rotating gear 4-1, the passive rotating gear 4-1 is rotatably arranged in the supporting shaft cylinder 3-5, the supporting shaft cylinder 3-5 provides a supporting function for the rotation of the passive rotating gear 4-1, the rotating motor 3-2 is in transmission connection with the active rotating gear 3-4, and the active rotating gear 3-2 is in meshing connection with the passive rotating gear 4-1. The grasping mechanism 4 can rotate automatically relative to the segment to be grasped, and is convenient to align with the segment to be grasped.

In this embodiment, on the basis of the above scheme, more preferably, the grabbing mechanism 4 is connected to the lower end of the supporting platform 3-3, the supporting platform 3-3 is connected to the lifting hook 2-5, and the telescopic frame 3-1 is further connected between the supporting platform 3-3 and the main walking structure 2-1. The telescopic frame 3-1 is connected, the walking mechanism 2 is not in direct contact with a supporting platform of the hanging mechanism 3, and the telescopic frame 3-1 can ensure the stability of the grabbing mechanism 4 in the rotating process.

In this embodiment, specifically, the telescopic frame 3-1 is two folding telescopic frames connected between the supporting platform 3-3 and the main walking structure 2-1, the folding telescopic frames are formed by hinging a plurality of groups of connecting rods end to end sequentially through hinge shafts, and each group of connecting rods includes two connecting rods. The telescopic frame is simple in structure, convenient to manufacture and stable in connection.

The method for transferring the segments by adopting the multi-segment crane comprises the following steps: when the duct pieces are transported to the field from the outside of the field, the duct pieces need to be transferred to the front part of the shield tunneling machine in time for assembly, and the multi-duct-piece crane described in the foregoing is used for transferring, and the method comprises the following steps: firstly, the whole crane equipment is driven by a walking motor to be meshed with a rack on a walking track 1 through a walking gear to drive a walking wheel 2-2 to roll, and a whole grabbing mechanism 4 is driven to walk to a first segment storage position to prepare for grabbing segments; after the crane moves to the first segment storage place, the hoisting motor of the electric hoisting machine 2-3 is controlled to rotate, the suspension mechanism 3 and the grabbing mechanism 4 fall down along with the descending of the lifting hook 2-5, the telescopic frame 3-1 also slowly extends, and after the grabbing mechanism 4 falls to a proper position close to the first segment, the grabbing mechanism 4 starts to rotate under the driving of the rotating motor 3-2 through the meshing of the driving rotating gear 3-4 and the driven rotating gear 4-1, so that a proper angle is found to facilitate grabbing and grabbing the segment by hands. The telescopic frame 3-1 can avoid shaking in the rotating process, so that the safety of operation is improved; thirdly, according to the position of the pipe piece, the oil cylinder 4-4 is adjusted to extend out to drive the grabbing hands 4-3 on the two sides to open, so that the pipe piece is just positioned between the grabbing hands on the two sides, the fixed brackets 4-3-2 on the grabbing hands 4-3 are conveniently inserted below the pipe piece, at the moment, the oil cylinder 4-4 is adjusted to contract to drive the four fixed brackets 4-3-2 on the grabbing hands 4-3 on the two sides to be inserted below a first pipe piece, and then the first pipe piece is jointly supported; it should be noted that at this time, the adjusting cylinders on the second-stage grabbing arm 4-3-9 and the third-stage grabbing arm 4-3-6 are both in a contracted state, and the rotating brackets on the second-stage grabbing arm 4-3-9 and the third-stage grabbing arm 4-3-6 are both accommodated in the corresponding grabbing arms; fourthly, the grabbing mechanism 4 drives the first segment to rise under the driving of the hoisting motor, the whole grabbing mechanism 4 moves to the storage position of the second segment again, after the first segment arrives, a piston rod of the rotary oil cylinder 4-3-10 extends out, the second-stage grabbing arm 4-3-9 is pushed to the vertical position, at the moment, the electric hoisting machine 2-3 and the rotary motor 3-2 are controlled to adjust the posture and the height of the grabbing mechanism, and the second segment can be accurately supported when the rotary bracket 4-3-8 pushes the second segment to the horizontal state when the adjusting oil cylinder 4-3-7 extends out; fifthly, the grasping mode of the third and more than third segments is the same as the fourth step; sixthly, after the segments are grabbed, the multi-segment crane drives the segments to be conveyed to the front part of the shield machine together, and when the segments are put down, the actions of grabbing the segments are consistent, and the sequence is opposite.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not necessarily denote a limitation of quantity. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The exemplary embodiments of the present invention have been described in detail with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and changes may be made to the specific embodiments without departing from the concept of the present invention, and various combinations of the technical features and structures of the present invention may be implemented without departing from the scope of the present invention.

Claims

1. A grasping hand, comprising:

grabbing a hand support;

the uppermost first-stage grabbing arm of the multi-stage grabbing arm is fixedly connected to the lower end of the grabbing hand bracket, and adjacent grabbing arms are hinged;

the first adjusting assembly is arranged between the adjacent grabbing arms and used for adjusting the next-stage grabbing arm to fold or extend relative to the previous-stage grabbing arm;

the bracket is arranged on the inner end surface of the grabbing arm, the bracket on the first-stage grabbing arm is a fixed bracket or a rotating bracket, and the bracket on the grabbing arm below the first-stage grabbing arm is a rotating bracket; and

and the second adjusting component is arranged on the grabbing arm and used for adjusting the protrusion or non-protrusion of the rotating bracket from the inner end surface of the grabbing arm.

2. The gripper of claim 1, wherein the first adjusting assembly comprises a connecting rod and a rotating cylinder, the connecting rod is disposed on a side surface of the gripper arm at the upper stage, one end of the rotating cylinder is hinged to a free end of the connecting rod, and the other end of the rotating cylinder is hinged to a side surface of the gripper arm at the lower stage; the second adjusting part comprises an adjusting oil cylinder and a mounting groove arranged on the grabbing arm, the rotating bracket is hinged to the inner upper portion of the mounting groove, two ends of the adjusting oil cylinder are hinged to the rotating bracket respectively and the inner lower portion of the mounting groove, and the adjusting oil cylinder can control the rotating bracket to rotate inwards when stretching out and drawing back the mounting groove or outwards rotate to the mounting groove.

3. A multi-blade hoist, comprising:

the travelling mechanism reciprocates on a travelling track, and the travelling track is used for supporting the movement of the multi-pipe-slice crane; and

the grabbing mechanism is hung on the lower portion of the travelling mechanism and can move up and down relative to the travelling mechanism, the grabbing mechanism comprises a grabbing support, an adjusting oil cylinder and a grabbing hand according to any one of claims 1-2, the grabbing hand is hinged to the grabbing support, the adjusting oil cylinder is arranged between the grabbing support and the grabbing hand, and the adjusting oil cylinder is adjusted to control the grabbing hand to grab and release the duct piece.

4. The multi-pipe-slice crane according to claim 3, wherein the walking mechanism comprises a walking main structure, a walking motor, a walking gear and a walking wheel matched with the walking track are arranged on the walking main structure, the walking motor is in transmission connection with the walking gear, and a gear strip in meshing connection with the gear is arranged on the inner side of the walking track; electric winches are arranged on two sides of the walking main structure, and lower ends of steel wire ropes of the electric winches are connected with lifting hooks.

5. A multi-pipe-slice crane according to claim 3 or 4, wherein the grabbing mechanism is suspended at the lower end of the travelling mechanism through a suspension mechanism, the suspension mechanism comprises a supporting platform, a supporting shaft cylinder, a rotating motor and a driving rotating gear are arranged on the supporting platform, a driven rotating gear is connected to the upper portion of the grabbing bracket, the driven rotating gear is rotatably arranged in the supporting shaft cylinder, the rotating motor is in transmission connection with the driving rotating gear, and the driving rotating gear is in meshing connection with the driven rotating gear.

6. The multi-pipe-slice crane according to claim 4, wherein the grabbing mechanism is suspended at the lower end of the traveling mechanism through a suspension mechanism, the suspension mechanism comprises a supporting platform, the grabbing mechanism is connected at the lower end of the supporting platform, the supporting platform is connected with the lifting hook, and a telescopic frame is further connected between the supporting platform and the main structure of the traveling mechanism.

7. A multi-pipe blade crane according to claim 6, wherein the telescopic frames are two folding telescopic frames connected between the support platform and the main structure of the walking machine, the folding telescopic frames are formed by a plurality of groups of connecting rods hinged end to end sequentially through hinge shafts, and each group of connecting rods comprises two connecting rods.

8. A multi-pipe-slice crane according to claim 6 or 7, wherein the supporting platform is provided with a supporting shaft cylinder, a rotating motor and a driving rotating gear, the upper part of the grabbing bracket is connected with a driven rotating gear, the driven rotating gear is rotatably arranged in the supporting shaft cylinder, the rotating motor is in transmission connection with the driving rotating gear, and the driving rotating gear is in meshing connection with the driven rotating gear.

9. The multi-pipe-slice crane according to claim 3, wherein two grabbing hands are respectively arranged on two sides of the grabbing bracket, the upper parts of the grabbing hand brackets of the two grabbing hands on the same side are connected through a cross rod, one end of the adjusting oil cylinder is hinged with the cross rod, and the other end of the adjusting oil cylinder is hinged with the grabbing bracket.