阅读说明：本技术 大直径金属管道切割装置 (Large-diameter metal pipeline cutting device ) 是由 杨红雄 于 2021-12-08 设计创作，主要内容包括：本发明涉及建筑机械技术领域,尤其涉及一种大直径金属管道切割装置,旨在解决手持小型切割机切割误差较大的问题。本发明包括外筒和与外筒同轴的内筒；外筒上设置有夹持面朝向外筒内部的夹持组件；内筒设置于外筒内部并且与外筒沿外筒的轴线方向滑动连接；内筒内部设置有环形运动的切割机构,切割机构的切割片朝向内筒的中心。大直径金属管道切割装置设置有第一工位和第二工位；第一工位和第二工位之间的距离为目标长度。通过夹持组件定位和两工位设置,保证定长准确,通过切割机构环形运动,保证切割面平整,从而减小手持工具切割带来的误差。(The invention relates to the technical field of construction machinery, in particular to a large-diameter metal pipeline cutting device, and aims to solve the problem that a handheld small-sized cutting machine is large in cutting error. The invention comprises an outer cylinder and an inner cylinder which is coaxial with the outer cylinder; the outer barrel is provided with a clamping component with a clamping surface facing the inside of the outer barrel; the inner cylinder is arranged in the outer cylinder and is in sliding connection with the outer cylinder along the axial direction of the outer cylinder; the inner cylinder is internally provided with a cutting mechanism which moves in a ring shape, and a cutting blade of the cutting mechanism faces to the center of the inner cylinder. The large-diameter metal pipeline cutting device is provided with a first station and a second station; the distance between the first station and the second station is the target length. Through centre gripping subassembly location and two station settings, guarantee that the fixed length is accurate, through cutting mechanism annular motion, guarantee that the cutting plane levels to reduce the error that handheld tool cutting brought.)

1. A large-diameter metal pipeline cutting device is characterized by comprising an outer cylinder (100) and an inner cylinder (200) coaxial with the outer cylinder (100);

the outer cylinder (100) is provided with a clamping component (300) with a clamping surface facing the inside of the outer cylinder (100);

the inner cylinder (200) is arranged inside the outer cylinder (100) and is connected with the outer cylinder (100) in a sliding mode along the axial direction of the outer cylinder (100); a cutting mechanism (400) which moves in a ring shape is arranged in the inner barrel (200), and a cutting blade (440) of the cutting mechanism (400) faces to the center of the inner barrel (200);

the large-diameter metal pipeline cutting device is provided with a first station and a second station;

at the first station, the cutting mechanism (400) may perform a cutting operation at a first location;

at the second station, the cutting mechanism (400) may perform a cutting operation at a second location, the second location being remote from the first location;

the first position and the second position are arranged along the axial direction of the outer cylinder (100), and the distance between the first position and the second position is a target length.

2. The large-diameter metal pipe cutting device according to claim 1, further comprising a length fixing mechanism (500), wherein the length fixing mechanism (500) is disposed between the outer cylinder (100) and the inner cylinder (200) and connected with the outer cylinder (100) and the inner cylinder (200);

the length control mechanism (500) comprises a first lead screw (510) and a first position display (520) connected with the first lead screw (510), and the first position display (520) displays the driving distance of the first lead screw (510) so as to determine the second station.

3. The large-diameter metal pipe cutting device according to claim 2, wherein an annular rail (210) is provided on the inner cylinder (200), the annular rail (210) is coaxial with the inner cylinder (200), and the cutting mechanism (400) moves along the annular rail (210).

4. The large-diameter metal pipeline cutting device according to claim 3, wherein an internal gear (220) is arranged on the inner cylinder (200), a driving gear (410) is arranged on the cutting mechanism (400), the internal gear (220) is meshed with the driving gear (410), and the internal gear (220) is coaxially arranged with the annular track (210).

5. The large-diameter metal pipeline cutting device according to claim 4, wherein a limit baffle (420) is arranged at the cutting blade (440) of the cutting mechanism (400), the limit baffle (420) is perpendicular to the diameter direction of the inner cylinder (200), and the limit baffle (420) is tangent to the excircle of the large-diameter metal pipeline during operation.

6. The large-diameter metal pipeline cutting device according to claim 5, wherein a telescopic assembly (430) is arranged on the cutting mechanism (400), one end of the telescopic assembly (430) is connected with the driving gear (410), the other end of the telescopic assembly is connected with the cutting blade (440), and the telescopic direction of the telescopic assembly (430) is along the radial direction of the inner cylinder (200).

7. The large diameter metal pipe cutting apparatus according to claim 6, wherein the clamping assembly (300) includes a shoe (310), the shoe (310) is disposed at an end of the clamping assembly (300) near the inside of the outer barrel (100), the shoe (310) moves in a radial direction of the outer barrel (100), and a curvature of the shoe (310) matches a curvature of the metal pipe.

8. The large-diameter metal pipe cutting device according to claim 7, wherein the clamping assembly (300) further comprises a second lead screw (320) and a second position display (330), the second lead screw (320) is connected with the pad (310), the axial direction of the second lead screw (320) is the same as the radial direction of the outer cylinder (100), and the second position display (330) is connected with the second lead screw (320) to display the driving distance of the second lead screw (320).

9. The large-diameter metal pipe cutting apparatus according to claim 8, wherein the outer cylinder (100) and the inner cylinder (200) are divided into an upper half and a lower half by a plane passing through the axes of the outer cylinder (100) and the inner cylinder (200), and one end of the upper half and one end of the lower half are hinged and the other end is detachably connected.

10. The large-diameter metal pipe cutting apparatus according to claim 9, further comprising a moving elevating platform (600) disposed below the outer tub (100), the outer tub (100) being connected with the moving elevating platform (600).

Technical Field

The invention relates to the technical field of construction machinery, in particular to a large-diameter metal pipeline cutting device.

Background

The large metal pipeline on the building construction site is generally required to be cut for use, when the metal pipeline with the fixed length is required, all the metal pipeline is cut by a handheld small-sized cutting machine in the prior art, the circular cutting line is defined on the pipeline in the common operation, then the metal pipeline is cut along the cutting line, and the problem that the cutting surface is not flat necessarily exists in the cutting mode. Meanwhile, the end face of the metal pipeline on site usually has the problems of abrasion, unevenness and the like, so that the two ends of the cut metal pipeline have the problem of unevenness, the error of the cut fixed-length pipeline is larger, and the goodness of fit of the joint between the pipes is reduced easily during construction.

In addition, if a large-sized cutting device is used to cut both end faces, the following operations need to be performed: positioning to the first position → assembling → cutting to form the first cut face → disassembling → positioning to the second position → assembling → cutting to form the second cut face. From the above cutting process, it can be seen that each cutting of the cutting method in the prior art requires re-assembling equipment, and each assembling will cause problems of coaxiality error, length error and the like, and the disassembly and assembly on the construction site will affect the operation efficiency.

Disclosure of Invention

The invention aims to provide a large-diameter metal pipeline cutting device, which is used for solving the problems of large cutting length error and low goodness of fit between pipelines caused by uneven cutting surfaces due to the fact that a cutting machine is held by hands.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

a large-diameter metal pipeline cutting device comprises an outer cylinder and an inner cylinder which is coaxial with the outer cylinder; the outer barrel is provided with a clamping component with a clamping surface facing the inside of the outer barrel;

the inner cylinder is arranged in the outer cylinder and is in sliding connection with the outer cylinder along the axial direction of the outer cylinder; a cutting mechanism moving in a ring shape is arranged in the inner cylinder, and a cutting blade of the cutting mechanism faces to the center of the inner cylinder;

the large-diameter metal pipeline cutting device is provided with a first station and a second station; under the first station, the cutting mechanism can execute cutting operation at a first position; under the second station, the cutting mechanism can execute cutting operation at a second position, and the second position is far away from the first position;

the first position and the second position are arranged along the axial direction of the outer cylinder, and the distance between the first position and the second position is the target length.

Furthermore, the large-diameter metal pipeline cutting device also comprises a length fixing mechanism, wherein the length fixing mechanism is arranged between the outer cylinder and the inner cylinder and is connected with the outer cylinder and the inner cylinder; the length control mechanism comprises a first lead screw and a first position display connected with the first lead screw, and the first position display displays the driving distance of the first lead screw so as to determine a second station.

Furthermore, an annular track is arranged on the inner cylinder, the annular track is coaxial with the inner cylinder, and the cutting mechanism moves along the annular track.

Furthermore, an inner gear is arranged on the inner cylinder, a driving gear is arranged on the cutting mechanism, the inner gear is meshed with the driving gear, and the inner gear and the annular track are coaxially arranged.

Furthermore, a limiting baffle is arranged at the position of a cutting blade of the cutting mechanism, the limiting baffle is perpendicular to the diameter direction of the inner cylinder, and the limiting baffle is tangent to the excircle of the large-diameter metal pipeline during working.

Furthermore, a telescopic assembly is arranged on the cutting mechanism, one end of the telescopic assembly is connected with the driving gear, the other end of the telescopic assembly is connected with the cutting blade, and the telescopic direction of the telescopic assembly is along the radial direction of the inner barrel.

Further, the centre gripping subassembly includes the tile, and the tile sets up in the one end that the centre gripping subassembly is close to the urceolus inside, and the radial removal of tile along the urceolus, the curvature of tile and the curvature matching of tubular metal resonator.

Furthermore, the clamping assembly further comprises a second lead screw and a second position displayer, the second lead screw is connected with the tile, the axial direction of the second lead screw is the same as the radial direction of the outer barrel, and the second position displayer is connected with the second lead screw to display the driving distance of the second lead screw.

Furthermore, the outer cylinder and the inner cylinder are divided into an upper half part and a lower half part by a plane passing through the axes of the outer cylinder and the inner cylinder, one end of the upper half part and one end of the lower half part are hinged, and the other ends are detachably connected.

Further, the large-diameter metal pipeline cutting device further comprises a movable lifting platform arranged below the outer barrel, and the outer barrel is connected with the movable lifting platform.

The working principle of the cutting device provided by the scheme is briefly described as follows:

after the clamping assembly clamps the pipeline, the position of the inner cylinder is adjusted to a first station, and the cutting mechanism moves along the annular track to complete cutting of the first position to form a first cutting surface. And then adjusting the inner cylinder to a second station, and moving the cutting mechanism along the annular track to finish cutting at a second position to form a second cutting surface. The distance between the first position and the second position is a set length.

The technical effects of the scheme can be realized as follows:

this scheme can realize the accurate cutting under the no dismouting condition:

the scheme does not need to disassemble and assemble the outer cylinder, and can realize the cutting of the set length only by moving the inner cylinder, so that the problem of the reduction of the precision and the coaxiality caused by repeated assembling and disassembling in the prior art is effectively solved.

Firstly: the outer barrel, the inner barrel and the large-diameter metal pipeline are kept coaxial through clamping and positioning of the clamping component on the outer barrel, so that the axis of the cutting blade is parallel to the axis of the large-diameter metal pipeline, and the coaxiality is guaranteed.

Secondly, the method comprises the following steps: the driving distance of the screw rod is determined through the second position displayer of the clamping assembly, and then the position of the tile is determined, so that the position of the tile can be accurately adjusted, the tile is coaxial with the large-diameter metal pipeline, and the outer cylinder and the pipeline are coaxial.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a structural view of a large-diameter metal pipe cutting apparatus according to an embodiment of the present invention;

fig. 2 is a perspective view illustrating an operating state of a large-diameter metal pipe cutting apparatus according to an embodiment of the present invention;

FIG. 3 is a perspective view of an open state of a large diameter metal pipe cutting apparatus according to an embodiment of the present invention;

FIG. 4 is a perspective view showing the opened state of the outer and inner cylinders according to the present invention

FIG. 5 is a perspective view of the cutting mechanism of the present invention;

FIG. 6 is a perspective view of the clamping assembly of the present invention;

FIG. 7 is a front view of the outer and inner barrels of the present invention;

FIG. 8 is a perspective view of the mobile lift platform of the present invention;

FIG. 9 is a schematic view of a large-diameter metal pipe cutting apparatus according to an embodiment of the present invention in a first position;

fig. 10 is a schematic view of a second position of the large-diameter metal pipe cutting apparatus according to the embodiment of the present invention.

Icon: 100-outer cylinder; 200-an inner cylinder; 300-a clamping assembly; 400-a cutting mechanism; 500-length fixing mechanism; 600-moving the lifting platform; 700-left supplemental support assembly; 800-right supplemental support assembly; 110-a mounting block; 120-connecting knob; 130-linear guide rail; 140-limiting flange; 210-a circular track; 220-internal gear; 230-inner ring; 310-a tile; 320-a second lead screw; 330-a second position display; 340-a connecting seat; 350-a guide rod; 360-a second screw; 370-a second gland; 380-a second adjustable handle; 390-a second hand wheel; 410-a drive gear; 420-a limit baffle; 430-a telescoping assembly; 440-cutting the slices; 450-a drive motor; 460-a mobile seat; 470-a cutting motor; 480-a cutting seat; 510-a first lead screw; 520-a first position display; 530-a first hand wheel; 540-a first adjustable handle; 550-a first gland; 610-movable caster with brake; 620-fixed caster; 630-a frame; 640-an electric telescopic cylinder; 650-limit platform.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

When large-scale metal pipeline fixed length cutting of construction scene, generally use handheld small-size cutting machine to cut, mark annular line of cut on the pipeline, then cut along the line of cut, this kind of cutting mode has the problem of cutting plane unevenness. Meanwhile, the end face of the metal pipeline on site usually has the problems of abrasion, unevenness and the like, so that the two ends of the cut metal pipeline have the problem of unevenness, and the error of the cut fixed-length pipeline is larger.

In view of this, the invention provides a large-diameter metal pipeline cutting device, so as to solve the problem that the cutting length error is large due to the fact that a cutting surface is not flat caused by a handheld cutting machine.

The structure and shape of the large-diameter metal pipe cutting device provided by the embodiment are described in detail in the following with reference to the accompanying drawings:

the large-diameter metal pipeline cutting device provided by the invention comprises an outer cylinder 100 and an inner cylinder 200, as shown in fig. 1, 2, 3 and 4, the outer cylinder 100 and the inner cylinder 200 are coaxially arranged, a linear guide rail 130 is arranged between the outer cylinder 100 and the inner cylinder 200, the guide rail of the linear guide rail 130 is fixedly connected with the outer cylinder 100, and a slide block of the linear guide rail 130 is fixedly connected with the inner cylinder 200, so that the inner cylinder 200 slides relative to the outer cylinder 100 along the linear guide rail 130.

Further, the large-diameter metal pipe cutting apparatus further includes a length fixing mechanism 500, as shown in fig. 1 and 4, the length fixing mechanism 500 is disposed between the outer cylinder 100 and the inner cylinder 200 and connected to the outer cylinder 100 and the inner cylinder 200.

Further, the length control mechanism 500 includes a first lead screw 510, two sides of the first lead screw 510 are connected with two sides of the outer cylinder 100, a first nut is disposed on the inner cylinder 200, and is matched with the first lead screw 510, and the lead screw is rotated to drive the inner cylinder 200 to move along the axis of the outer cylinder 100.

Further, the length control mechanism 500 further includes a first position indicator 520, and the first position indicator 520 is connected to the first lead screw 510 and indicates a distance that the first lead screw 510 drives the inner cylinder 200 to move.

Further, a first hand wheel 530 is connected to one end of the first lead screw 510, so as to rotate the lead screw.

Further, the length control mechanism 500 further includes a first pressing cover 550 and a first adjustable handle 540 mounted on the first pressing cover 550, a through hole is formed in the first pressing cover 550, and one side of the first lead screw 510 is connected to the first position display 520 and the first hand wheel 530 in sequence after passing through the through hole. The first position display 520 is mounted on the first gland 550 and the digital display interface of the first position display 520 is directed toward the first hand wheel 530 for easy viewing by the operator.

Further, a threaded hole is formed in the first gland 550, and the axial direction of the threaded hole is perpendicular to the axial direction of the first lead screw 510; the first position-adjustable handle 540 is screwed into the threaded hole and abuts against the shaft of the first lead screw 510, so that the first lead screw 510 is locked and released, and the inner cylinder 200 is prevented from moving due to factors such as vibration after being fixed.

Further, a conical roller bearing is installed on the first lead screw 510, so that the axial positioning of the first lead screw 510 is ensured, and the first lead screw 510 rotates smoothly.

Further, as shown in fig. 1, 3 and 7, the inner cylinder 200 includes an inner ring 230, an inner gear 220 and an annular rail 210, and the linear guide 130 is connected to an outer circumferential surface of the inner ring 230. The inner gear 220 is fixed to an inner circumferential surface of the inner race 230, and the annular rail 210 is coaxially disposed with the inner gear 220 and fixedly coupled with the inner race 230.

Further, the large-diameter metal pipe cutting apparatus further includes a cutting mechanism 400, as shown in fig. 1 and 5, the cutting mechanism 400 includes a movable base 460, a driving gear 410 and a driving motor 450. The driving motor 450 is fixed on the moving base 460, the driving gear 410 is connected with the driving motor 450, the driving gear 410 is engaged with the internal gear 220, and the cutting mechanism 400 moves along the circular track 210 under the driving of the driving motor 450.

Further, an L-shaped slot is formed in the movable base 460, a circular boss is arranged on the circular rail 210 to enable the cross section of the circular rail 210 to be L-shaped, the L-shaped slot is matched with the circular rail 210 to limit the spatial position of the movable base 460, and the cutting mechanism 400 is guaranteed to only do circular motion along the circular rail 210.

Further, the cutting mechanism 400 further includes a telescopic assembly 430 fixedly connected to the movable base 460, wherein the telescopic assembly 430 is in a radial direction of the inner barrel 200. Preferably, the telescopic assembly 430 is a guide cylinder; optionally, the telescopic assembly 430 is configured as a combination of a cylinder and a linear guide rail; optionally, the telescopic assembly 430 is provided as a combination of a cylinder and a guide rod; alternatively, the telescoping assembly 430 may be provided as an electric telescoping cylinder.

Further, the extending end of the telescopic assembly 430 is connected with a cutting seat 480, and a cutting motor 470 is fixed on the cutting seat 480.

Further, the cutting mechanism 400 further comprises a cutting blade 440, the cutting blade 440 is fixedly connected with the cutting motor 470, and the axial direction of the cutting blade 440 is parallel to the axial direction of the inner cylinder 200.

Further, cutting mechanism 400 still includes limit baffle 420, limit baffle 420 and cutting seat 480 fixed connection, and limit baffle 420 is parallel with cutting piece 440's axis direction, and limit baffle 420 is tangent with major diameter metal pipe's excircle during the cutting, and the relative position of restriction cutting piece 440 and metal pipe avoids cutting piece 440 excessively to cut into metal pipe and causes the cutting motion to be obstructed.

Further, the large-diameter metal pipeline cutting device further comprises a clamping assembly 300, wherein the clamping assembly 300 is fixedly arranged on the outer cylinder 100, so that the outer cylinder 100 and the large-diameter metal pipeline are ensured to be coaxial. As shown in fig. 1 and 6, the clamping assembly 300 includes a pad 310, a second screw 320, a second nut 360 and a connecting seat 340, the second nut 360 and the pad 310 are fixedly disposed on the connecting seat 340, and the second screw 320 is engaged with the second nut 360 to drive the pad 310 to move along the axial direction of the second screw 320.

Further, the axial direction of the second lead screw 320 is consistent with the radial direction of the outer cylinder 100, the pad 310 is arc-shaped, and the axial line of the pad 310 is parallel to the axial line of the outer cylinder 100; the radius of the one side of tile 310 and major diameter metal pipeline excircle contact is unanimous with major diameter metal pipeline's excircle diameter, makes tile 310 and major diameter metal pipeline laminating, guarantees the centre gripping effect.

Further, a variety of pads 310 may be optionally provided to accommodate different sizes of large diameter metal pipes.

Further, the clamping assembly 300 further comprises a guide rod 350, an axis of the guide rod 350 is parallel to an axis of the second lead screw 320, the outer cylinder 100 is provided with the mounting block 110, the guide rod 350 and the second lead screw 320 are fixed to the mounting block 110, and the guide rod 350 is slidably connected with the connecting seat 340 to ensure that the connecting seat 340 moves along a radial direction of the outer cylinder 100.

Further, a linear bearing is arranged on the connecting seat 340, and the guide rod 350 penetrates through the linear bearing to be matched with the linear bearing, so that the connecting seat 340 is ensured to slide smoothly on the guide rod 350. And meanwhile, the linear bearing is preferentially damaged, so that the connecting seat 340 is prevented from being damaged by stress, and the maintainability is improved.

Further, the clamping assembly 300 further includes a second pressing cover 370, and the second pressing cover 370 is fixedly connected to the mounting block 110 to limit the second lead screw 320.

Further, a conical roller bearing is mounted on the second lead screw 320, so that the axial positioning of the second lead screw 320 is ensured, and meanwhile, the smooth degree of the rotation of the second lead screw 320 is improved.

Further, the clamping assembly 300 further comprises a second adjustable handle 380, a threaded hole is formed in the second gland 370, the axial direction of the threaded hole is perpendicular to the axial direction of the second lead screw 320, the threaded portion of the second adjustable handle 380 is inserted into the threaded hole, the end portion of the threaded portion of the second adjustable handle 380 abuts against the lead screw, locking and releasing of the lead screw are controlled, and the lead screw drives the shoe 310 to be in place and locked, so that looseness caused by vibration and the like is prevented.

Further, the clamping assembly 300 further includes a second position indicator 330, the second position indicator 330 is fixedly connected to the second pressing cover 370, and indicates the driving displacement of the screw rod, so as to indicate the position of the pad 310 more accurately and ensure that the pad 310 is coaxial with the large-diameter metal pipe. Meanwhile, the digital display interface of the second position display 330 faces the end face of the tub 100, so that the operator can observe the digital display interface conveniently.

Further, the clamping assembly 300 further includes a second handwheel 390, the second handwheel 390 is fixedly connected to an end of the second lead screw 320 facing away from the pad 310, and the second handwheel 390 is rotated to drive the second lead screw 320.

Further, the clamping members 300 are provided at both ends of the tub 100 and arranged along the circumference of the tub 100.

Further, as shown in fig. 3 and 4, the outer cylinder 100 and the inner cylinder 200 are divided into an upper half and a lower half by a plane passing through the axes of the outer cylinder 100 and the inner cylinder 200, and one end of the upper half and the lower half are hinged and the other end is detachably connected.

Further, one connecting end of the outer cylinder 100 of the upper half part and the lower half part is hinged, the other connecting end is provided with a connecting plate, the connecting plate is respectively provided with a unthreaded hole and a corresponding threaded hole, and the connecting plate is fixed together by a connecting knob 120 which penetrates through the unthreaded hole and is screwed into the threaded hole.

Further, the connection ends of the inner rings 230 of the upper half and the lower half and the annular track 210 are provided with bosses and corresponding grooves, so as to ensure that the upper half and the lower half are aligned.

Further, the large-diameter metal pipe cutting device further comprises a movable lifting platform 600, as shown in fig. 1 and 8, the movable lifting platform 600 comprises a frame 630, movable casters 610 and fixed casters 620 with brakes, which are arranged below the frame 630, an electric telescopic cylinder 640 and a limiting platform 650. Two ends of the electric telescopic cylinder 640 are respectively connected with the frame 630 and the limiting platform 650, and the limiting platform 650 is lifted up and down by lifting the electric telescopic cylinder 640, so that the height of the outer barrel 100 is adjusted. The relative position of the outer tub 100 and the large-diameter metal pipe is adjusted by the movement of the moving elevating platform 600.

Further, the lower half of the outer barrel 100 is provided with a limit rib 140, and the limit ribs 140 are arranged on two sides of the outer barrel 100 and are matched with the upper end surface of the limit platform 650 to prevent the outer barrel 100 from rotating.

Since the cut end of the pipeline is suspended due to the loss of support after the pipeline is cut, the left supplementary support assembly 700 and the right supplementary support assembly 800 are added to enhance the stability after cutting. The left supplementary support assembly 700 is connected to the outer cylinder 100, the right supplementary support assembly 800 is connected to the inner cylinder 200, and the right supplementary support assembly 800 is disposed at the left side of the cutting mechanism 400 and moves along with the inner cylinder 200, for details of the principle, refer to fig. 9 and 10. Reference may be made, among other things, to clamp assembly 300 for the structure of left supplemental support assembly 700 and right supplemental support assembly 800. It should be noted that the left supplemental support assembly 700 does not interfere with movement of the inner cartridge 200 when the conduit is not clamped, allowing the inner cartridge 200 to pass therethrough, as shown in FIG. 9.

Before the first position cutting is performed, the clamping assembly 300 at the left end and the clamping assembly 300 at the right end are matched to realize the balanced support of the steel pipe, as shown in fig. 9.

After the first position cutting is performed, the steel pipe loses the support of the clamping assembly 300 at the left end, and the left supplementary support assembly 700, the right supplementary support assembly 800 and the clamping assembly 300 at the right end are matched to realize the balanced support of the steel pipe.

After the second position cutting is performed, the steel pipe loses the support of the clamping assembly 300 at the right end, and the left supplementary support assembly 700 and the right supplementary support assembly 800 are matched to realize the balanced support of the steel pipe.

The working process of the large-diameter metal pipeline cutting device provided by the embodiment is as follows:

the initial state of the device is as follows, the clamping assembly 300, the left supplementary support assembly 700 and the right supplementary support assembly 800 are all in an open state, so that the diameter of the circle surrounded by the tiles 310 is larger than the diameter of the large-diameter metal pipe.

The both ends of the large-diameter metal pipe are fixed and erected, then the large-diameter metal pipe cutting device is pushed to the vicinity of the pipe, the connection knob 120 is loosened, the upper half is opened and the large-diameter metal pipe cutting device is moved to the lower side of the pipe. The elevating platform 600 is moved according to the height and diameter adjustment of the pipeline so that the outer tub 100 is coaxial with the pipeline, and then the upper half is closed and the coupling knob 120 is tightened. As shown in fig. 9, the gripping assembly 300 is adjusted, the second wheel 390 is rotated, the position of the pad 310 is adjusted, the gripping assembly 300 is made to grip the pipe, and the display numbers of the respective second position displays 330 are made to be consistent, so as to ensure that the pipe is stressed evenly. Then, the first hand wheel 530 is rotated to adjust the position of the inner cylinder 200 to a first station, cutting is performed on the first position, at this time, the telescopic assembly 430 extends out, the cutting motor 470 drives the cutting piece 440 to cut the pipeline, meanwhile, the driving motor 450 drives the driving gear 410, so that the cutting mechanism 400 moves along the circular track 210 to complete cutting of the first station, a first cutting surface is formed, then, the telescopic assembly 430 retracts, and the cutting motor 470 and the driving motor 450 stop working. The first hand wheel 530 is then rotated to adjust the inner barrel 200 to the second station, as shown in FIG. 10. The right supplemental support assembly 800 is then actuated causing the right supplemental support assembly 800 to grip the pipe while the left supplemental support assembly 700 is actuated causing the left supplemental support assembly 700 to grip the pipe. At this point, left supplemental support assembly 700 and right supplemental support assembly 800 clamp a desired length of pipe to be intercepted. And finally, cutting the second position to form a second cutting surface. After the cutting is finished, the left supplementary support assembly 700 and the right supplementary support assembly 800 are loosened, and the cut pipeline between the first cutting surface and the second cutting surface is taken down, so that the pipeline with the required target length is obtained.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.