CN213622700U - Coil pipe blank stacker and automatic pipe uncoiling device - Google Patents

Abstract

The utility model discloses a coil pipe blank stacker crane and an automatic pipe uncoiling device, belonging to the field of coil pipe processing equipment and reducing the human input, the coil pipe blank stacker crane of the utility model comprises a material rack and two trusses arranged on the material rack, the two ends of the two trusses are provided with pipe stacking areas, the pipe processing area is arranged below the two trusses, the upper ends of the trusses are provided with slide rails, the two slide rails are provided with a walking trolley in a sliding way, a lifting appliance for lifting the pipe materials and a driver for controlling the lifting of the lifting appliance are arranged on the travelling trolley, the lifting appliance comprises a lifting appliance support, a lifting appliance air cylinder arranged on the lifting appliance support and a linkage piece arranged at the bottom of the lifting appliance support, the lifting appliance air cylinder is in transmission connection with the linkage part so that the arc-shaped push plates clamp or loosen the pipe materials.

Description

Coil pipe blank stacker and automatic pipe uncoiling device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a coil pipe processing equipment field especially relates to coil pipe blank hacking machine and automatic unwinding unit of pipe material.

[ background of the invention ]

Among the prior art, when carrying out the coil pipe operation of opening a book, can use the decoiler, generally adopt manual operation when feeding to the decoiler, can consume a large amount of manpowers, and inefficiency, the incident appears easily, and artifical transport also can cause some damages to the pipe material.

[ Utility model ] content

The utility model aims to solve the technical problem that overcome prior art not enough and propose coil pipe blank hacking machine, reduce the human input.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the coil pipe blank stacker comprises a material rack and two trusses arranged on the material rack, wherein pipe stacking areas are arranged at two ends of the two trusses, a pipe material processing area is arranged below the two trusses, slide rails are arranged at the upper ends of the trusses, a walking trolley is arranged on the two slide rails in a sliding manner, a lifting appliance for lifting the pipe materials and a driver for controlling the lifting of the lifting appliance are arranged on the travelling trolley, the walking trolley moves back and forth between the pipe material stacking areas at the two ends of the truss so as to convey the pipe materials in the pipe material stacking areas to the pipe material processing area, the lifting appliance comprises a lifting appliance support, a lifting appliance air cylinder arranged on the lifting appliance support and a linkage piece arranged at the bottom of the lifting appliance support, the lifting appliance air cylinder is in transmission connection with the linkage part so that the arc-shaped push plates clamp or loosen the pipe materials.

The utility model provides a stacker crane for transport the pipe material in the pipe material stacking area to pipe material processing area, the truss both sides have a pipe material stacking area respectively, transport through a walking dolly only, can reduce the cost of equipment, the walking dolly can be sent to pipe material processing area after extracting the pipe material automatically, in this process, to the handling, the conveying of pipe material, all need personnel to participate in; when the pipe material is lifted, the pipe material is clamped by using the arc-shaped push plate, the arc-shaped push plate extends into the inner ring of the pipe material and then is expanded outwards to abut against the inner ring of the pipe material so as to clamp the pipe material, the shape of the arc-shaped push plate is similar to that of the inner ring of the pipe material, and the damage to the pipe material is small; compare in current operation mode, use the utility model discloses a hacking machine, work efficiency is higher, and the manpower that drops into still less reduces staff's the operation degree of difficulty, and the operational environment is also safer, and the pipe material also receives the loss also littleer in the transportation simultaneously.

Furthermore, the hoist cylinder is installed hoist support upper end, the interlock spare is including being located hoist support lower extreme's main shaft, the main shaft with the piston rod of hoist cylinder is connected, the main shaft with be equipped with multiunit link assembly between the hoist support lower extreme, every group link assembly connects an arc push pedal to control the position change of arc push pedal. The hoist cylinder can control the flexible of piston rod, drives the motion of the link assembly who is connected with the arc push pedal to realize controlling the motion of arc push pedal, thereby carry out the handling to the pipe material, realized that handling process automation goes on.

Furthermore, the connecting rod assembly comprises a first connecting rod arranged at the upper end of the main shaft and a second connecting rod arranged at the lower end of the main shaft, two ends of the first connecting rod and the second connecting rod are respectively hinged with the main shaft and the arc-shaped push plate, the lower end of the lifting appliance support is hinged with a third connecting rod hinged with the first connecting rod, and the third connecting rod is composed of two connecting rods with hinged end parts.

The arc push plate is connected with the main shaft through the first connecting rod and the second connecting rod, the position change of the arc push plate is limited by the first connecting rod and the second connecting rod, the arc push plate cannot move freely relative to the main shaft, the pipe cannot fall off from the lifting appliance in the process of lifting the pipe, the main shaft keeps an included angle between the first connecting rod and the main shaft through the third connecting rod, namely the distance between the arc push plate and the main shaft, when the arc push plate is abutted to the inner ring of the pipe, the offset state of the arc push plate and the inner ring of the pipe can be kept by maintaining the distance between the third connecting rod and the two hinged parts of the main shaft and the first connecting rod, the pipe can be kept on the lifting appliance and cannot fall off, the included angle between the first connecting rod, the second connecting rod and the main shaft can be adjusted, the arc push plate can be displaced in the radial direction of the axial lead of the pipe, and.

Furthermore, the upper end of the hanger bracket is provided with a plurality of radially extending pipe bodies, the plurality of pipe bodies are connected with the driver through a chain, and the end parts of the plurality of pipe bodies are provided with supporting pieces which are abutted against the pipe materials when the pipe materials are hoisted. The hanger is suspended below the driver through the chain, when the hanger is driven by the driver to move downwards to hoist the pipe materials, the arc-shaped push plates extend into the inner ring of the pipe materials, the hanger continues to descend, the supporting piece is in contact with the pipe materials and stops the hanger from continuing to descend, the chain is loosened from tightening, the lifting motion of the driver is not influenced, and a distance enabling the driver to slow down and buffer is reserved between the driver and the hanger, so that the contact surface of the arc-shaped push plates and the pipe materials is maximized, the lifting is more stable, and the driver does not need to accurately control the descending height of the hanger; and even if the position deviation occurs between the lifting appliance and the pipe material, the chain can also be used for bending and adjusting the position of the lifting appliance in the transverse direction.

Further, support piece is including supporting base and slidable mounting's regulating spindle on the body, be equipped with a plurality of through-holes that set up along the axial on the regulating spindle, be equipped with on the body and insert the through-hole is in order to restrict the bolt of support piece displacement. The regulating spindle can slide at the axial direction for the body, mediates the interval of supporting between base and the body, and the displacement of regulating spindle obtains the restriction behind the bolt insertion through-hole, can't continue to slide to keep supporting the interval between base and the body unchangeable, stretch into the length of pipe material inner circle with adjusting the arc push pedal, come to face the pipe material of different specifications.

Furthermore, the driver comprises at least two guide posts penetrating through the walking trolley in the vertical direction and a motor driving the at least two guide posts to move up and down, the upper ends of the at least two guide posts are connected with each other, and the lower ends of the at least two guide posts are connected with the lifting appliance. Through two guide posts, can avoid installing the rotation for the guide post in the hoist of guide post below appearance, the upper end of two piece at least guide posts keeps connecting the back, can carry on spacingly to the decurrent displacement of guide post, and the motor can provide great power, and need not arrange along vertical direction, and the holistic height of equipment can not be too big.

Furthermore, the slide rail comprises a track and a chain, and the walking trolley is provided with a roller in sliding fit with the track and a chain wheel assembly meshed with the chain. The gyro wheel cooperates with the track, can carry on spacingly to the displacement of walking dolly lateral part to can reduce the friction between walking dolly and the truss, sprocket assembly and chain meshing can provide big and stable power for the walking dolly, and the difficult condition that the walking dolly skids with the truss that appears, and the inertia of self also can't make it continue to move when the walking dolly stops, can reduce the position deviation of hoist.

Furthermore, the sprocket assembly comprises a first sprocket and two second sprockets arranged on two sides of the first sprocket, the first sprocket is located above the two second sprockets, and the chain is meshed with the lower ends of the two second sprockets and the upper end of the first sprocket. The walking dolly is at the removal in-process, and first sprocket and second sprocket and chain keep meshing to realized stable transmission, guaranteed that the position of walking dolly is difficult for appearing the position deviation, the handling precision is high, so that realize equipment automation and move.

The automatic uncoiling device for the pipe materials comprises the coil pipe blank stacker crane, and two uncoiling stations are arranged at the pipe material processing area. Can transport the pipe material stacking area of both sides to pipe material processing district respectively through the hacking machine to use two to open a book the station and carry out pipe material simultaneously and open a book, work efficiency is high.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention will be further explained with reference to the drawings:

fig. 1 is an isometric view of a coil blank stacker crane in an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic structural view of a coil blank stacker crane in the embodiment of the present invention;

FIG. 4 is an enlarged schematic view at B of FIG. 3;

fig. 5 is a schematic structural view of an automatic uncoiling device for a pipe material in an embodiment of the present invention.

Reference numerals:

the device comprises a material rack 100, a truss 110, a slide rail 111, a rail 1111, a chain 1112, a pipe material stacking area 120 and a pipe material processing area 130;

the walking trolley 200, the roller 210, the chain wheel component 220, the first chain wheel 221 and the second chain wheel 222;

the lifting appliance comprises a lifting appliance 300, a lifting appliance bracket 310, a lifting appliance air cylinder 320, a main shaft 330, a connecting rod assembly 331, a first connecting rod 3311, a second connecting rod 3312, a third connecting rod 3313, an arc-shaped push plate 340 and a pipe body 350;

the driving device 400, the guide column 410, the motor 420, the transverse plate 430 and the fixing tube 440;

a chain 500;

the support 600, the support base 610, the adjusting shaft 620, the through hole 630 and the bolt 640;

an unwind station 700.

[ detailed description ] embodiments

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" 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 to simplify the description, but do not indicate or imply that the device or element 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" 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 meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 4, the embodiment of the utility model provides a coil blank hacking machine, including work or material rest 100 with install two trusses 110 on work or material rest 100, two trusses 110 both ends are equipped with the pipe material and stack district 120, two trusses 110 below are equipped with pipe material processing district 130, truss 110 upper end is equipped with slide rail 111, slidable mounting has the walking dolly 200 of handling function on two slide rails 111, walking dolly 200 is in the pipe material at truss 110 both ends stack district 120 between round trip movement in order to transport the pipe material in the pipe material stacking district 120 to pipe material processing district 130.

The walking trolley 200 is used for conveying the pipe materials in the pipe material stacking area 120 to the pipe material processing area 130, the two sides of the truss 110 are respectively provided with the pipe material stacking area 120, multiple coils of pipe materials are stacked in the pipe material stacking area 120, only one walking trolley 200 is used for conveying, the cost of the equipment can be reduced, the walking trolley 200 can automatically extract the pipe materials and then convey the pipe materials to the pipe material processing area 130, in the process, the pipe materials are lifted and conveyed, personnel participation is not needed, the manpower input is reduced, and the whole operation process is safer.

The travelling trolley 200 is provided with a lifting appliance 300 for lifting pipes and a driver 400 for controlling the lifting appliance 300 to lift, the lifting appliance 300 comprises a lifting appliance support 310, a lifting appliance cylinder 320 for mounting the lifting appliance support 310 and a linkage part mounted at the bottom of the lifting appliance support 310, the linkage part is provided with a plurality of arc-shaped push plates 340 capable of extending into inner rings of the pipes, and the lifting appliance cylinder 320 is in transmission connection with the linkage part so that the arc-shaped push plates 340 clamp or loosen the pipes.

The pipe blank of the coil pipe is a coil of spiral pipe material, the pipe material is clamped by using the arc push plate 340 when the pipe material is lifted, the arc push plate 340 extends into the inner ring of the pipe material and then is outwards spread to abut against the inner ring of the pipe material so as to clamp the pipe material, the clamping of the pipe material is completed, the shape of the arc push plate 340 is similar to that of the inner ring of the pipe material, and the damage to the pipe material is small; compare in current operation mode, use the utility model discloses a hacking machine, work efficiency is higher, and the manpower that drops into still less reduces staff's the operation degree of difficulty, and the operational environment is also safer, and the pipe material also receives the loss also littleer in the transportation simultaneously.

In the aforesaid, hoist cylinder 320 is installed in hoist support 310 upper end, the interlock spare is including the main shaft 330 that is located hoist support 310 lower extreme, main shaft 330 is connected with the piston rod of hoist cylinder 320, be equipped with multiunit link assembly 331 between main shaft 330 and the hoist support 310 lower extreme, an arc push pedal 340 is connected to every group link assembly 331, with the position change of control arc push pedal 340, the flexible of piston rod can be controlled to utensil cylinder, the motion of the link assembly 331 that drives and arc push pedal 340 is connected, with the motion of realization control arc push pedal 340, thereby carry out the handling to the pipe material, it goes on to have realized that handling process automation.

Preferably, the connecting rod assembly 331 includes a first connecting rod 3311 and a second connecting rod 3312, the first connecting rod 3311 and the second connecting rod 3312 have the same length, the first connecting rod 3311 is hinged to a portion of the main shaft 330 near the upper end thereof, the second connecting rod 3312 is hinged to a portion of the main shaft 330 near the lower end thereof, the first connecting rod 3311 and the second connecting rod 3312 are simultaneously hinged to an arc-shaped push plate 340, the lower end of the hanger bracket 310 is hinged to a third connecting rod 3313, the third connecting rod 3313 is hinged to the first connecting rod 3311, and the third connecting rod 3313 is composed of two connecting rods with hinged ends.

In the above, the following steps: the arc push plate 340 is connected to the main shaft 330 through the first connecting rod 3311 and the second connecting rod 3312, and the position change of the arc push plate is limited by the first connecting rod 3311 and the second connecting rod 3312, and cannot move freely (position change or angle change relative to the main shaft 330) relative to the main shaft 330, and the first connecting rod 3311 and the second connecting rod 3312 have a linkage relationship, and the movement of the first connecting rod 3311 and the movement of the second connecting rod 3312 are consistent, so that when no position change occurs between the first connecting rod 3311 and the main shaft 330 and between the second connecting rod 3312 and the main shaft 330, the position change of the pipe material cannot occur, and thus, the pipe material cannot fall off in the process of lifting the pipe material;

the first link 3311 and the third link 3313 are hinged, the relative position relationship between the first link 3311 and the main shaft 330 (i.e. the included angle between the two, which also corresponds to the distance between the arc push plate 340 and the main shaft 330) is maintained by the third link 3313, when the arc push plate 340 abuts against the inner ring of the pipe material, the abutting state of the arc push plate 340 against the inner ring of the pipe material can be maintained by maintaining the distance between the third link 3313 and the two hinged parts of the main shaft 330 and the first link 3311, the pipe material is maintained on the hanger 300 without falling off, when the main shaft 330 extends and retracts, the included angle between the two segments of the third link 3313 is forced to change, or the included angles between the first link 3311 and the main shaft 330 are changed, so that the radial displacement of the arc push plate 340 in the axial lead of the pipe material can be controlled, and the hanger can be applied to pipe materials of different specifications.

In the above, the following steps: the driver 400 comprises two guide posts 410 penetrating the walking trolley 200 in the vertical direction and a motor 420 driving the two guide posts 410 to move up and down, the upper ends of the two guide posts 410 are connected with each other, the lower end of the two guide posts is connected with the lifting appliance 300, the two guide posts 410 can avoid the lifting appliance 300 arranged below the guide posts 410 from rotating relative to the guide posts 410, the upper ends of the two guide posts 410 are kept connected, the downward displacement of the guide posts 410 can be limited, the motor 420 can provide large force, the arrangement in the vertical direction is not needed, and the height of the whole device is not too large.

Referring to fig. 2, based on the above embodiment, in another embodiment of the present invention: the hoist support 310 upper end is equipped with a plurality of to radially extending's body 350, and two guide posts 410 below are connected with diaphragm 430, sets up twice fixed pipe 440 on the diaphragm 430, is connected through chain 500 between fixed pipe 440 and a plurality of body 350, and the tip of a plurality of bodies 350 is equipped with support piece 600 that offsets with the tubular product when hoist and mount tubular product.

The hanger 300 is suspended below the driver 400 through the chain 500, when the hanger 300 is driven by the driver 400 to move downwards to hoist the tubular material, the arc push plates 340 extend into the inner ring of the tubular material, the hanger 300 continues to descend, the support 600 is in contact with the tubular material and stops the hanger 300 from continuing to descend, the chain 500 is loosened from being tightened, the lifting motion of the driver 400 is not affected, and a space capable of enabling the driver 400 to decelerate and buffer is reserved between the driver 400 and the hanger 300, so that the contact surface between the arc push plates 340 and the tubular material can be maximized, the lifting is more stable, and the driver 400 does not need to accurately control the descending height of the hanger 300; even if the hanger 300 is displaced from the pipe material, the chain 1112 can adjust the position of the hanger 300 in the lateral direction by bending.

Wherein, support piece 600 includes support base 610 and slidable mounting's regulation axle 620 on body 350, be equipped with a plurality of through-holes 630 that set up along the axial on the regulation axle 620, be equipped with on the body 350 and insert through-hole 630 in order to restrict the bolt 640 of support piece 600 displacement, regulation axle 620 can slide at the axial direction for body 350, mediate the interval between support base 610 and the body 350, the displacement of regulation axle 620 is restricted after bolt 640 inserts through-hole 630, can't continue to slide, thereby keep supporting the interval between base 610 and the body 350 unchangeable, with the length that the arc push pedal 340 stretched into the pipe material inner circle of regulation, come to face the pipe material of different specifications.

The supporting piece can be further provided with a sensor for judging the relative position relation between the lifting appliance and the pipe material, and the lifting appliance can be controlled to be started through the signal so as to further realize the automatic movement of the equipment.

Referring to fig. 4, in order to precisely stop the traveling trolley at different positions on the truss, in another embodiment of the present invention, the sliding rail 111 includes a rail 1111 and a chain 1112, the traveling trolley 200 is provided with a roller 210 slidably engaged with the rail 1111 and a sprocket assembly 220 engaged with the chain 1112, and the roller 210 is engaged with the rail 1111 to limit the displacement of the side of the traveling trolley 200 and reduce the friction between the traveling trolley 200 and the truss 110.

The chain wheel assembly 220 comprises a first chain wheel 221 and two second chain wheels 222 arranged on two sides of the first chain wheel 221, the first chain wheel 221 is positioned above the two second chain wheels 222, a chain 1112 is meshed with the lower ends of the two second chain wheels 222 and the upper end of the first chain wheel 221, the first chain wheel 221 and the second chain wheel 222 are respectively meshed with the chain 1112 in the moving process of the walking trolley 200, large and stable force can be provided for the walking trolley 200, stable transmission is realized, the walking trolley 200 and the truss 110 are not easy to slip, the walking trolley 200 cannot continuously move due to inertia of the walking trolley 200 when stopping, the position deviation of the walking trolley 200 is ensured not to occur easily, the position deviation of the hanger 300 is reduced, the lifting precision is high, and automatic operation of equipment is facilitated.

Referring to fig. 5, the embodiment of the utility model provides a still provide an automatic unwinding unit of pipe material, including foretell coil pipe blank hacking machine, pipe material processing district 130 department is equipped with two and opens a book station 700, can stack the district 120 with the pipe material of both sides respectively through the hacking machine and transport to pipe material processing district 130 to use two to open a book station 700 and carry out the pipe material simultaneously and open a book, work efficiency is high.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (9)

1. The coil pipe blank stacker is characterized by comprising a material rack and two trusses arranged on the material rack, the two ends of the two trusses are provided with pipe stacking areas, the pipe processing area is arranged below the two trusses, the upper ends of the trusses are provided with slide rails, the two slide rails are provided with a walking trolley in a sliding way, a lifting appliance for lifting the pipe materials and a driver for controlling the lifting of the lifting appliance are arranged on the travelling trolley, the walking trolley moves back and forth between the pipe material stacking areas at the two ends of the truss so as to convey the pipe materials in the pipe material stacking areas to the pipe material processing area, the lifting appliance comprises a lifting appliance support, a lifting appliance air cylinder arranged on the lifting appliance support and a linkage piece arranged at the bottom of the lifting appliance support, the lifting appliance air cylinder is in transmission connection with the linkage part so that the arc-shaped push plates clamp or loosen the pipe materials.

2. The coil blank stacker according to claim 1, wherein the hanger cylinder is mounted at the upper end of the hanger support, the linkage comprises a main shaft located at the lower end of the hanger support, the main shaft is connected with a piston rod of the hanger cylinder, a plurality of groups of connecting rod assemblies are arranged between the main shaft and the lower end of the hanger support, and each group of connecting rod assemblies is connected with an arc-shaped push plate to control the position change of the arc-shaped push plate.

3. The coil blank stacker according to claim 2, wherein the connecting rod assembly comprises a first connecting rod arranged at the upper end of the main shaft and a second connecting rod arranged at the lower end of the main shaft, two ends of the first connecting rod and the second connecting rod are respectively hinged with the main shaft and the arc-shaped push plate, a third connecting rod hinged with the first connecting rod is hinged to the lower end of the hanger bracket, and the third connecting rod is composed of two connecting rods hinged to the two ends of the hanger bracket.

4. The coil blank stacker according to claim 1, wherein a plurality of radially extending tubes are arranged at the upper end of the hanger bracket, the tubes are connected with the driver through a chain, and supports abutting against the tubes when the tubes are hoisted are arranged at the ends of the tubes.

5. A coil blank stacker according to claim 4 wherein said support comprises a support base and an adjustment shaft slidably mounted on a tube, said adjustment shaft having a plurality of axially disposed through holes, said tube having a plug insertable into said through holes to limit the displacement of said support.

6. The coil blank stacker according to claim 1, wherein the driver comprises at least two guide posts penetrating through the traveling trolley in the vertical direction and a motor driving the at least two guide posts to move up and down, the upper ends of the at least two guide posts are connected with each other, and the lower ends of the at least two guide posts are connected with the hanger.

7. A coil blank stacker according to any one of claims 1 to 6, wherein the slide rail comprises a rail and a chain, and the travelling trolley is provided with a roller in sliding fit with the rail and a sprocket assembly engaged with the chain.

8. The coil blank stacker of claim 7 wherein the sprocket assembly comprises a first sprocket and two second sprockets disposed on either side of the first sprocket, the first sprocket being located above the two second sprockets, the chain engaging a lower end of the two second sprockets and engaging an upper end of the first sprocket.

9. An automatic uncoiling device for a pipe, comprising the coil pipe blank stacker crane according to any one of claims 1 to 8, wherein two uncoiling stations are arranged at the pipe processing area.

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