CN209940416U

CN209940416U - Be used for petrochemical engineering pipeline to overhaul workstation

Info

Publication number: CN209940416U
Application number: CN201920603002.8U
Authority: CN
Inventors: 吴臻
Original assignee: Zhenyou Heavy Industry (jiangsu) Co Ltd
Current assignee: Zhenyou Heavy Industry (jiangsu) Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-01-14
Anticipated expiration: 2029-04-29

Abstract

The utility model provides a maintenance workbench for petrochemical engineering pipelines, which comprises a base, an electric hydraulic cylinder, a workbench, a stand column, a bottom frame, a top frame, an auxiliary rotating shaft, a transmission block, a rocker and a rotating wheel; four groups of electric hydraulic cylinders are fixedly arranged at the top of the base through bolts, and the tops of the electric hydraulic cylinders are movably provided with a workbench through hinged connection; the tops of the two groups of the front sides of the electric hydraulic cylinders are provided with sliding block type hinged connecting blocks, and the hinged connecting blocks can be movably arranged in a guide rail of the workbench; eight groups of upright posts are integrally arranged on two sides of the top of the workbench, and the positions of two adjacent groups of upright posts are arranged in a staggered manner; the setting of rotating the wheel can be followed the pipeline top and is assisted fixedly to the pipeline, and the position of cooperation drive screw promotion lift pedestal to the cooperation rocker rotates the axial displacement pipeline, makes things convenient for the inspection pipeline and moves the position of convenient maintenance with the pipeline and repairs, convenient to use, and drive screw passes through chain drive, and convenient while is controlled.

Description

Be used for petrochemical engineering pipeline to overhaul workstation

Technical Field

The utility model belongs to the technical field of the pipeline maintenance, more specifically say, in particular to be used for petrochemical industry pipeline maintenance workstation.

Background

Industry pipeline, be the pipe form setting usually, and because the requirement of big discharge capacity is satisfied to needs, its pipe diameter is great usually, after using a period, need examine and repair industry pipeline, including the industry pipeline of vertical setting usually in to longer pipeline, because the maintainer can't stand in the industry pipeline that is vertical setting, and thus, when overhauing, need dismantle the industry pipeline of vertical setting and get off the maintenance, and assemble the industry pipeline again after having overhauld, and dismantle and assemble industry pipeline and need spend a large amount of times, the maintenance efficiency is low, the influence is with the supporting operation of using relevant industrial equipment of this industry pipeline.

Through retrieval, for example, patent No. CN206737418U discloses an industrial pipeline maintenance platform, which comprises two sets of standing assemblies arranged up and down respectively and a connection assembly for connecting the two sets of standing assemblies, each standing assembly comprises a standing ring for a maintenance worker to stand and an air bag arranged in an annular shape, expanding along with inflation and contracting along with deflation, the outer diameter of the standing ring is smaller than the inner diameter of the industrial pipeline, the air bag is sleeved on the outer annular surface of the standing ring, the outer annular diameter of the air bag is abutted against the inner pipe wall of the industrial pipeline in the expanded state, the inner annular diameter of the air bag is abutted against the outer annular surface of the standing ring, and the connection assembly at least comprises two connection chains/connection ropes for connecting the two standing rings. The utility model discloses in, through two sets of subassemblies of standing and coupling assembling's setting, the maintainer can overhaul in the industrial pipeline of vertical setting, and need not dismantle the industrial pipeline of vertical setting and come out, need not to dismantle industrial pipeline and can overhaul, has greatly improved maintenance efficiency.

For another example, patent No. CN208120700U discloses an industry pipeline overhauls platform, including circular base, support frame an, support frame b, driving motor, wire rod wheel, cylinder workstation, wire rope and support base, the both ends outer wall is equipped with the support base about the circular base, the circular base upper end left and right sides is equipped with support frame an and support frame b respectively, support frame an top is equipped with driving motor, be equipped with the wire rod wheel in the driving motor pivot, the circular base inner chamber is equipped with the cylinder workstation, cylinder workstation upper end is connected with the wire rod wheel through being equipped with wire rope. The utility model discloses a be equipped with circular base and circular base inner chamber and be equipped with the cylinder workstation, can be fixed in vertical mouth of pipe with circular base, put down the cylinder workstation perpendicularly and put into intraductal messenger maintainer can overhaul in the industrial pipeline of vertical setting, be favorable to improving the maintenance efficiency of industrial pipeline, comparatively practical is fit for extensively promoting and using.

Based on the aforesaid, mainly use the maintenance workstation at present and mainly put the mouth of pipe through axial pendant or card and fix, cause the harm to the pipeline easily, be unfavorable for the long distance removal inspection of pipeline, be unfavorable for keeping the balance of pipeline, and the platform does not possess angle of adjustment and highly convenient function that detects.

Therefore, in view of the above, research and improvement are made for the existing structure and defects, and a workbench for examining and repairing petrochemical pipelines is provided, so as to achieve the purpose of higher practical value.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a be used for petrochemical industry pipeline maintenance workstation to solve present mainly use maintenance workstation that proposes in the above-mentioned background art and mainly put the mouth of pipe through axial pendant or card and fix, cause the harm to the pipeline easily, be unfavorable for the long distance removal inspection of pipeline, be unfavorable for keeping the balance of pipeline, and the platform does not possess the problem of angle of adjustment and the highly convenient function that detects.

The utility model relates to a purpose and efficiency for petrochemical engineering pipeline overhauls workstation is reached by following specific technological means:

a workbench for overhauling petrochemical pipelines comprises a base, an electric hydraulic cylinder, a workbench, a stand column, a bottom frame, a top frame, an auxiliary rotating shaft, a large cylinder, a connecting shell, a small cylinder, a transmission gear, a round handle, a square ejector rod, a top cover, a transmission screw, an inner gear, a lifting shaft frame, a transmission block, a rocker and a rotating wheel; four groups of electric hydraulic cylinders are fixedly arranged at the top of the base through bolts, and the tops of the electric hydraulic cylinders are movably provided with a workbench through hinged connection; the tops of the two groups of the front sides of the electric hydraulic cylinders are provided with sliding block type hinged connecting blocks, and the hinged connecting blocks can be movably arranged in a guide rail of the workbench; eight groups of upright posts are integrally arranged on two sides of the top of the workbench, and the positions of two adjacent groups of upright posts are arranged in a staggered manner; the two sides of the top of the workbench are integrally provided with six groups of large cylinders which are aligned in three rows, the distances between the large cylinders are equal, and one side of each large cylinder is integrally provided with a small cylinder.

Furthermore, top frames are fixedly arranged at the tops of the stand columns through bolts; eight groups of underframe are fixedly arranged on the ejector rod through bolts; the bottom frame and the top frame are both arranged to be inclined structures, and the inner side surfaces of the bottom frame and the top frame are parallel; an auxiliary rotating shaft is movably arranged between the bottom frame and the top frame through a rotating shaft, and the included angle between the auxiliary rotating shaft and the base is 24 degrees.

Furthermore, square ejector rods are fixedly arranged at the tops of the large cylinders through bolts, and top covers are fixedly arranged at the tops of the square ejector rods through bolts; the inner side of the large cylinder is embedded with a tapered roller bearing through a circular groove, and the bottom of the transmission screw rod can be fixedly arranged in the tapered roller bearing at the inner side of the large cylinder through interference fit and a clamp spring; a circular groove is formed in the inner side of the top of the square ejector rod, a bearing is fixedly arranged on the inner side of the top of the square ejector rod in an interference fit manner, and the top of the transmission screw rod is arranged in the bearing on the top of the square ejector rod in the interference fit manner; one side of the square ejector rod is provided with a strip-shaped groove; a transmission block is integrally arranged on one side of the lifting shaft frame, and a screw hole is formed in the middle of the transmission block; the lifting shaft bracket can be fixedly arranged in the square ejector rod through the threaded connection and the matching of the transmission block.

Furthermore, an inner gear is fixedly arranged on the outer side of the bottom of the transmission screw rod through a key connection, and a chain gear is fixedly arranged at the outer end of the transmission screw rod at the bottom of the inner gear through a key connection; the inner sides of the large cylinders are provided with square holes, and the bottoms of the square holes are outwards integrally provided with a tray structure; a connecting shell is fixedly arranged outside the tray structure through bolts, and a chain gear penetrates through the inner side of the connecting shell to be connected with a chain in a moving mode.

Further, a bearing is fixedly arranged on the inner side of the top of the small cylinder in an interference fit manner, and a transmission gear is fixedly arranged in the bearing in the interference fit manner; the bottom of the transmission gear is of a rod-shaped structure, and the top of the transmission gear is fixedly provided with a round handle through welding; one side of the large cylinder is provided with a square hole, and one side of the transmission gear and one side of the round handle are positioned in the square hole and meshed with the internal gear.

Furthermore, a rotating shaft is arranged on the inner side between the two groups of the lifting shaft brackets, and the outer ends of the three groups of the lifting shaft brackets on the front side are provided with through holes and fixedly connected with the rotating shaft through bolts, and rockers are fixedly arranged on the lifting shaft brackets; the middle of the rotating shaft of the lifting shaft frame is fixedly provided with a rotating wheel through key connection.

Compared with the prior art, the utility model discloses following beneficial effect has:

the setting of supplementary pivot provides the supplementary function of placing and moving the pipeline for the workstation, can drag the pipeline in the contained angle department of each group's supplementary pivot through the crisscross carrying between each group's supplementary pivot to cooperate the operation such as removal, simple structure conveniently dismantles the change.

The setting of rotating the wheel can be assisted fixedly from the pipeline top to the pipeline, and cooperation drive screw promotes the position of lift pedestal to cooperation rocker rotates the axial displacement pipeline, makes things convenient for the inspection pipeline and moves the position of convenient maintenance with the pipeline and repairs, convenient to use, and drive screw passes through chain drive, conveniently controls simultaneously, and, the setting of round handle, conveniently rotates drive gear, the height of manual control adjustment lift pedestal.

The setting of electric hydraulic cylinder can carry out height control to the workstation, and two sets of tops of electric hydraulic cylinder front side are slider formula hinge joint piece, and electric hydraulic cylinder can cooperate hinge joint block to go up and down both sides electric hydraulic cylinder to different heights to the convenient maintenance personal of slope workstation examines from the position of difference.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a left side view structure diagram of the present invention.

Fig. 3 is a schematic view of the three-dimensional structure of the lifting shaft bracket of the present invention.

Fig. 4 is a schematic diagram of a partially enlarged structure of the present invention.

In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:

1. the device comprises a base, 2, an electric hydraulic cylinder, 3, a workbench, 4, a stand column, 5, a bottom frame, 6, a top frame, 7, an auxiliary rotating shaft, 8, a large cylinder, 801, a connecting shell, 9, a small cylinder, 10, a transmission gear, 1001, a round handle, 11, a square ejector rod, 1101, a top cover, 12, a transmission screw, 1201, an internal gear, 13, a lifting shaft frame, 1301, a transmission block, 1302, a rocker, 14 and a rotating wheel.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in figures 1 to 4:

the utility model provides a be used for petrochemical industry pipeline to overhaul workstation, including base 1, electro-hydraulic cylinder 2, workstation 3, stand 4, chassis 5, roof-rack 6, supplementary pivot 7, big drum 8, connect shell 801, little drum 9, drive gear 10, round handle 1001, square ejector pin 11, top cap 1101, drive screw 12, internal gear 1201, lift pedestal 13, driving block 1301, rocker 1302 and running wheel 14; four groups of electric hydraulic cylinders 2 are fixedly arranged at the top of the base 1 through bolts, and a workbench 3 is movably arranged at the top of each electric hydraulic cylinder 2 through hinged connection; the tops of two groups of the front sides of the electric hydraulic cylinders 2 are provided with sliding block type hinged connecting blocks, and the hinged connecting blocks can be movably arranged in a guide rail of the workbench 3; eight groups of upright posts 4 are integrally arranged on two sides of the top of the workbench 3, and the positions of two adjacent groups of upright posts 4 are arranged in a staggered manner; the two sides of the top of the workbench 3 are integrally provided with six groups of large cylinders 8 which are aligned in three rows, the intervals of the large cylinders 8 are equal, and one side of each large cylinder is integrally provided with a small cylinder 9.

Wherein the tops of the upright columns 4 are fixedly provided with top frames 6 through bolts; eight groups of underframe 5 are fixedly arranged on the ejector rod 11 through bolts; the bottom frame 5 and the top frame 6 are both arranged to be of an inclined structure, and the inner side surfaces of the bottom frame 5 and the top frame 6 are parallel; the middle of the bottom frame 5 and the top frame 6 is provided with an auxiliary rotating shaft 7 through a rotating shaft, the included angle between the auxiliary rotating shaft 7 and the base 1 is 24 degrees, and a bearing pipeline can be assisted by arranging the auxiliary rotating shaft 7.

The top of each large cylinder 8 is fixedly provided with a square ejector rod 11 through a bolt, and the top of each square ejector rod 11 is fixedly provided with a top cover 1101 through a bolt; the inner side of the large cylinder 8 is embedded with a tapered roller bearing through a circular groove, and the bottom of the transmission screw 12 can be fixedly arranged in the tapered roller bearing at the inner side of the large cylinder 8 through interference fit and a clamp spring; a circular groove is formed in the inner side of the top of the square ejector rod 11, a bearing is fixedly arranged in an interference fit mode, and the top of the transmission screw rod 12 is arranged in the bearing at the top of the square ejector rod 11 in the interference fit mode; one side of the square ejector rod 11 is provided with a strip-shaped groove; a transmission block 1301 is integrally arranged on one side of the lifting shaft frame 13, and a screw hole is formed in the middle of the transmission block 1301; the lifting shaft bracket 13 can be fixedly arranged in the square ejector rod 11 through the threaded connection and the matching of the transmission block 1301, and the lifting shaft bracket 13 can be controlled to lift through the arrangement of the transmission screw 12.

The outer side of the bottom of the transmission screw 12 is fixedly provided with an internal gear 1201 through key connection, and the outer end of the transmission screw 12 at the bottom of the internal gear 1201 is fixedly provided with a sprocket through key connection; the inner sides of the large cylinders 8 are provided with square holes, and the bottoms of the square holes are outwards integrally provided with tray structures; the tray structure is externally provided with a connecting shell 801 through bolt fixing, a chain gear penetrates through the inner side of the connecting shell 801 to be connected with a chain in a moving mode, and the transmission screw 12 can rotate synchronously through the chain.

Wherein, the inner side of the top of the small cylinder 9 is fixedly provided with a bearing through interference fit, and the bearing is fixedly provided with a transmission gear 10 through interference fit; the bottom of the transmission gear 10 is of a rod-shaped structure, and the top of the transmission gear 10 is fixedly provided with a round handle 1001 through welding; one side of the large cylinder 8 is provided with a square hole, one side of the transmission gear 10 and one side of the round handle 1001 are positioned in the square hole to be meshed with the internal gear 1201, and the lifting of the lifting shaft bracket 13 can be controlled by arranging the transmission gear 10 and the round handle 1001.

A rotating shaft is arranged on the inner side between the two groups of the lifting shaft brackets 13, and through holes are formed in the outer ends of the three groups of the lifting shaft brackets 13 on the front side and are fixedly connected with the rotating shaft through bolts fixedly arranged with rockers 1302; the middle of the rotating shaft of the lifting shaft frame 13 is fixedly provided with a rotating wheel 14 through key connection, and the rotating wheel 14 can assist the pipeline to move so as to be convenient to overhaul.

The specific use mode and function of the embodiment are as follows:

in the utility model, four groups of electric hydraulic cylinders 2 are fixedly arranged on the top of a base 1 through bolts, and a movable setting workbench 3 is movably connected on the top of the electric hydraulic cylinders 2 through hinges; eight groups of upright columns 4 are integrally arranged on two sides of the top of the workbench 3; six groups of large cylinders 8 are integrally arranged on two sides of the top of the workbench 3 and aligned in three rows, and small cylinders 9 are integrally arranged on one side of the large cylinders 8 at equal intervals; the top of the upright post 4 is fixedly provided with a top frame 6 through bolts; eight groups of underframe 5 are fixedly arranged on the top rod 11 through bolts, and the inner side surfaces of the underframe 5 and the top frame 6 are parallel; an auxiliary rotating shaft 7 is movably arranged between the bottom frame 5 and the top frame 6 through a rotating shaft; a square ejector rod 11 is fixedly arranged at the top of the large cylinder 8 through a bolt, and a top cover 1101 is fixedly arranged at the top of the square ejector rod 11 through a bolt; a tapered roller bearing is embedded and arranged at the inner side of the large cylinder 8 through a circular groove, and the bottom of the transmission screw 12 is fixedly arranged in the tapered roller bearing at the inner side of the large cylinder 8 through interference fit and a clamp spring; a round groove is formed in the inner side of the top of the square ejector rod 11, a bearing is fixedly arranged in an interference fit manner, and the top of the transmission screw rod 12 is arranged in the bearing at the top of the square ejector rod 11 in the interference fit manner; one side of the square ejector rod 11 is provided with a strip-shaped groove; a transmission block 1301 is integrally arranged on one side of the lifting shaft frame 13, and a screw hole is formed in the middle of the transmission block 1301; the lifting shaft bracket 13 is fixedly arranged in the square ejector rod 11 through a threaded connection matched transmission block 1301; an internal gear 1201 is fixedly arranged on the outer side of the bottom of the transmission screw 12 through key connection, and a chain gear is fixedly arranged at the bottom of the internal gear 1201 at the outer end of the transmission screw 12 through key connection; a square hole is formed in the inner side of the large cylinder 8, and a tray structure is integrally arranged outwards at the bottom of the square hole; a connecting shell 801 is fixedly arranged outside the tray structure through bolts, and a chain is movably connected with the sprocket through the inner side of the connecting shell 801; a bearing is fixedly arranged on the inner side of the top of the small cylinder 9 through interference fit, and a transmission gear 10 is fixedly arranged in the bearing through interference fit; a round handle 1001 is fixedly arranged at the top of the transmission gear 10 through welding; one side of the large cylinder 8 is provided with a square hole, and the transmission gear 10 and one side of the round handle 1001 are positioned in the square hole to be meshed with the internal gear 1201; a rotating shaft is arranged on the inner side between two groups of the lifting shaft brackets 13, through holes are formed in the outer ends of three groups of the lifting shaft brackets 13 positioned on the front side, and a rocker 1302 is fixedly arranged through bolts and is fixedly connected with the rotating shaft; a rotating wheel 14 is fixedly arranged in the middle of a rotating shaft of the lifting shaft frame 13 through key connection; when the pipeline lifting device is used, a pipeline penetrates through the top of the auxiliary rotating shaft 7, the lifting shaft frame 13 is lowered by rotating the transmission gear 10 through thread transmission, the rotating wheel 14 is in contact with the top surface of the pipeline to fix the pipeline, and when the pipeline lifting device needs to be moved, the position of the pipeline can be moved by rotating the rocker 1302.

The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a be used for petrochemical industry pipeline to overhaul workstation which characterized in that: the workbench for overhauling the petrochemical engineering pipeline comprises a base (1), an electric hydraulic cylinder (2), a workbench (3), a stand column (4), a bottom frame (5), a top frame (6), an auxiliary rotating shaft (7), a large cylinder (8), a connecting shell (801), a small cylinder (9), a transmission gear (10), a round handle (1001), a square ejector rod (11), a top cover (1101), a transmission screw rod (12), an internal gear (1201), a lifting shaft frame (13), a transmission block (1301), a rocker (1302) and a rotating wheel (14); four groups of electric hydraulic cylinders (2) are fixedly arranged at the top of the base (1) through bolts, and a workbench (3) is movably arranged at the top of each electric hydraulic cylinder (2) through hinge connection; the tops of two groups of the front sides of the electric hydraulic cylinders (2) are provided with sliding block type hinged connecting blocks, and the hinged connecting blocks can be movably arranged in a guide rail of the workbench (3); eight groups of upright posts (4) are integrally arranged on two sides of the top of the workbench (3), and the positions of two adjacent groups of upright posts (4) are arranged in a staggered manner; the two sides of the top of the workbench (3) are integrally provided with six groups of large cylinders (8) which are aligned in three rows, the intervals of the large cylinders (8) are equal, and one side of each large cylinder is integrally provided with a small cylinder (9).

2. A service workbench for petrochemical pipelines according to claim 1, wherein: the tops of the upright posts (4) are all fixedly provided with top frames (6) through bolts; eight groups of underframe (5) are fixedly arranged on the ejector rod (11) through bolts; the bottom frame (5) and the top frame (6) are both arranged to be of an inclined structure, and the inner side surfaces of the bottom frame (5) and the top frame (6) are parallel; the auxiliary rotating shaft (7) is movably arranged between the bottom frame (5) and the top frame (6) through a rotating shaft, and the included angle between the auxiliary rotating shaft (7) and the base (1) is 24 degrees.

3. A service workbench for petrochemical pipelines according to claim 1, wherein: the top of each large cylinder (8) is fixedly provided with a square ejector rod (11) through a bolt, and the top of each square ejector rod (11) is fixedly provided with a top cover (1101) through a bolt; the inner side of the large cylinder (8) is embedded with a tapered roller bearing through a circular groove, and the bottom of the transmission screw (12) can be fixedly arranged in the tapered roller bearing on the inner side of the large cylinder (8) through interference fit and a clamp spring; a circular groove is formed in the inner side of the top of the square ejector rod (11), a bearing is fixedly arranged in an interference fit mode, and the top of the transmission screw rod (12) is arranged in the bearing at the top of the square ejector rod (11) in the interference fit mode; one side of the square ejector rod (11) is provided with a strip-shaped groove; a transmission block (1301) is integrally arranged on one side of the lifting shaft frame (13), and a screw hole is formed in the middle of the transmission block (1301); the lifting shaft frame (13) can be fixedly arranged in the square ejector rod (11) through a threaded connection matched transmission block (1301).

4. A service workbench for petrochemical pipelines according to claim 1, wherein: the outer side of the bottom of the transmission screw rod (12) is fixedly provided with an internal gear (1201) through key connection, and the outer end of the transmission screw rod (12) at the bottom of the internal gear (1201) is fixedly provided with a chain gear through key connection; the inner sides of the large cylinders (8) are provided with square holes, and the bottoms of the square holes are outwards integrally provided with a tray structure; a connecting shell (801) is fixedly arranged outside the tray structure through bolts, and a chain gear penetrates through the inner side of the connecting shell (801) to be connected with a chain in a moving mode.

5. A service workbench for petrochemical pipelines according to claim 1, wherein: the inner side of the top of the small cylinder (9) is fixedly provided with a bearing in an interference fit manner, and a transmission gear (10) is fixedly arranged in the bearing in the interference fit manner; the bottom of the transmission gear (10) is of a rod-shaped structure, and the top of the transmission gear (10) is fixedly provided with a round handle (1001) through welding; one side of the large cylinder (8) is provided with a square hole, and one side of the transmission gear (10) and one side of the round handle (1001) are positioned in the square hole and meshed with the internal gear (1201).

6. A service workbench for petrochemical pipelines according to claim 1, wherein: a rotating shaft is arranged on the inner side between two groups of the lifting shaft brackets (13), and through holes are formed in the outer ends of the three groups of the lifting shaft brackets (13) positioned on the front side, and a rocker (1302) is fixedly arranged through bolts and is fixedly connected with the rotating shaft; the middle of the rotating shaft of the lifting shaft frame (13) is fixedly provided with a rotating wheel (14) through key connection.