CN211971577U - Tower crane system - Google Patents
Tower crane system Download PDFInfo
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- CN211971577U CN211971577U CN202020174202.9U CN202020174202U CN211971577U CN 211971577 U CN211971577 U CN 211971577U CN 202020174202 U CN202020174202 U CN 202020174202U CN 211971577 U CN211971577 U CN 211971577U
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- tower crane
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Abstract
The utility model relates to a construction machinery field provides a tower crane system. The tower crane system includes: the tower crane comprises a tower crane body, a cantilever type travelling crane, a first operating platform, a second operating platform and a second hoisting block. The first hoisting block of the cantilever type crane is used for hoisting and pulling the attachment rod, and the second hoisting block is used for lowering the attachment rod. Through the cooperation of these two hoisting hoists, pull out the attachment rod from the building structure to first hoisting hoist can also be carried the attachment rod to the lifting hook of tower crane body. The first operating platform may be a working platform for a constructor to remove the attachment bar from the cantilevered row crane and mount it to the hook. The second operating platform is used as a working platform for constructors to detach the attachment rod from the tower crane body and install the attachment rod to the first hoisting block and the lifting hook. The utility model aims to reduce the degree of difficulty and the safety risk of demolising the adhesion rod.
Description
Technical Field
The utility model relates to a construction machinery field, concretely relates to tower crane system.
Background
When the height of the tower crane exceeds the maximum independent height of the tower crane, the tower crane is further lifted, and in order to avoid collapse of the tower crane, constructors can connect the tower crane to a building structure through the attachment rods. However, the removal of the attachment mast of the tower crane is a dangerous task. At present, most of the attachment rods of the tower cranes are detached by taking the tower crane as auxiliary hoisting equipment. The conventional demolition method has the following drawbacks:
(1) the slewing of the upper part of the tower crane is limited. The tower crane needs to lower its height to a level below the height of the attached building structure before the attachment mast is removed, thus limiting the slewing of the upper part of the tower crane.
(2) When the attachment rod is long, it is difficult to disassemble and the safety risk is large. When the tower crane self dismantles and adheres to the member, must draw to one side and drag to adhere to the pole. However, when the attachment rod is long, the self weight of the attachment rod is large, or one end of the attachment rod extends deep into the building structure, it becomes very difficult and a great safety risk to detach the attachment rod only by the tower crane itself.
(3) The glass curtain wall may be damaged. When the tower crane is used for disassembling the attachment rod which extends into the ultrahigh building structure, the glass curtain wall at the attachment point position on one side of the building structure is often installed, and only a narrow hole is reserved at the attachment point. If the tower crane is only used for obliquely pulling and obliquely hanging the tower crane to disassemble the attachment rod, the curtain wall glass is difficult to be prevented from being damaged when the attachment rod is moved out of the hole.
SUMMERY OF THE UTILITY MODEL
In order to reduce the degree of difficulty and the safe risk of demolising the adhesion rod, the utility model provides a tower crane system.
The tower crane system comprises: the tower crane comprises a tower crane body, a lifting hook and a plurality of standard joints, wherein the tower crane body comprises a sleeve frame, the lifting hook can lift an attachment rod, and the standard joints are vertically connected in sequence; the cantilever type crane comprises a track beam, a first hoisting block and at least one supporting arm, wherein one end of the supporting arm is connected with the sleeve frame, the other end of the supporting arm extends to a building structure connected with the attachment rod and is connected with the track beam, the first hoisting block can move towards the direction close to or far away from the lifting hook along the track beam, and the first hoisting block is used for hoisting the attachment rod; the first operating platform is connected with the sleeve frame and used for bearing constructors, so that the constructors can release the attachment rod from the first lifting block and install the attachment rod to the lifting hook; the second operating platform is detachably connected with one standard section and used for bearing constructors, so that the constructors can detach the attachment rod from one standard section and install the attachment rod to the first heavy hoist, and can detach the attachment rod from the first heavy hoist and install the attachment rod to the lifting hook; a second hoist for mounting to the building structure and for hoisting the attachment bar.
According to the utility model discloses an embodiment still includes third hoist block, and third hoist block is connected to the same standard festival with the adhesion rod, and the mounted position of third hoist block is higher than second operation platform, and third hoist block is used for hanging to draw the adhesion rod.
According to the utility model discloses an embodiment, first operation platform is equipped with first guy rope, and first guy rope can be used for connecting the adhesion rod.
According to the utility model discloses an embodiment, second operation platform is equipped with second guy rope, and second guy rope can be used for connecting the adhesion rod.
According to the utility model discloses an embodiment still includes third operation platform, and third operation platform is connected with the cover frame to third operation platform is located first operation platform below, and third operation platform is used for bearing constructor, so that constructor can pull down and install the lifting hook from first heavy calabash with the attachement pole.
According to the utility model discloses an embodiment, third operation platform is equipped with third guy rope, and third guy rope can be used for connecting the adhesion rod.
According to the utility model discloses an embodiment, cantilever type is hung and is still included at least one bracing and at least one suspension cable, and the support arm is through round pin hub connection to the stock, and at least one support arm is drawn to the support that at least one bracing corresponds, and at least one support arm is drawn to the corresponding hanging of at least one suspension cable.
According to the utility model discloses an embodiment, the both ends of track roof beam all are equipped with the limiting plate.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the first hoist block and the second hoist block may be connected to the attachment rod, respectively, and then disconnected from the building structure and the standard knot, respectively. The first hoist then pulls the attachment rod up while the second hoist lowers the attachment rod down until the attachment rod is pulled out of the building. Through the cooperation of these two hoisting blocks, the adhesion rod can be demolishd from the building safely high-efficiently. The first hoist can also drive the adhesion rod to remove to the lifting hook to make things convenient for adhesion rod safety efficient to be connected to the lifting hook, avoid the lifting hook to hang the adhesion rod to one side, also avoided tower crane operation violating the regulations. The first operating platform is used for bearing constructors, so that the constructors can remove the attachment rod from the first lifting hoist and install the attachment rod to the lifting hook. The second operation platform is used for bearing constructors, so that the constructors can detach the attachment rod from one standard knot and install the attachment rod to the first lifting hoist, and the constructors can detach the attachment rod from the first lifting hoist and install the attachment rod to the lifting hook. Therefore the utility model discloses a tower crane system and method of demolising of adhering to pole thereof can reduce the degree of difficulty and the safety risk of demolising the adhering to pole.
Drawings
FIG. 1 is a schematic view of an attachment bar connection in one embodiment of the present invention;
fig. 2 is a schematic side view of a cantilever type crane according to an embodiment of the present invention;
fig. 3 is a schematic front view of a cantilever type crane according to an embodiment of the present invention;
FIG. 4 is a partial schematic view of an attachment rod connection according to an embodiment of the present invention;
fig. 5 is a partial schematic view of a first hoist, a second hoist, and a third hoist being connected to an attachment rod, respectively, according to an embodiment of the present invention;
FIG. 6 is a partial schematic view of a hitch bar according to one embodiment of the present invention;
FIG. 7 is a partial schematic view of a hitch attachment bar in accordance with yet another embodiment of the present invention;
FIG. 8 is a partial schematic view of a hitch attachment bar in accordance with yet another embodiment of the present invention;
fig. 9 is a partial schematic view of the first hoist moving toward the hook according to an embodiment of the present invention;
FIG. 10 is a partial schematic view of an attachment bar coupled to a hook according to one embodiment of the present invention;
FIG. 11 is a schematic view of a hook hanging rod according to one embodiment of the present invention;
fig. 12 is a schematic view of a hook sling attachment bar according to yet another embodiment of the present invention.
Reference numerals:
10. a tower crane body; 102. sleeving a frame; 104 standard section; 12. hanging in a cantilever type; 121. a track beam; 122. a support arm; 123. a first heavy hoist; 124. a diagonal brace; 125. a stay cable; 14. a first operating platform; 16. a second operating platform; 18. a second hoist block; 20. a third hoisting block; 22. and a third operating platform.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples. It is to be understood that the embodiments described are some, but not all embodiments of the invention. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
As shown in fig. 1, in one embodiment of the present invention, a tower crane system includes a tower crane body 10. The tower crane body 10 includes a frame 102, a plurality of standard knots 104 and a hook. The standard joints 104 are connected vertically in sequence, and the frame 102 can move vertically along the standard joints 104, for example: the holster 102 climbs upward along the standard knuckles 104. It should be noted that the tower crane body 10 is a device known in the art, and the specific structure and operation method thereof are known to those skilled in the art (for example, the specific structure and connection manner of the frame 102 and the standard knot 104, the matching manner of the lifting hook and the crane boom, etc.), and the implementation and understanding of the present invention are well within the ability of those skilled in the art, and the description of the present invention is omitted here.
In one embodiment of the present invention, a tower crane system includes a cantilever crane 12. The cantilevered traveling crane 12 includes a rail beam 121, a first hoist 123, and at least one support arm 122.
As shown in fig. 2 to 3, in the present embodiment, one end of the support arm 122 is connected to the jacket 102, and the other end of the support arm 122 extends towards the building structure to which the attachment pole is connected (or, the support arm 122 and the attachment pole are located on the same side of the tower crane body 10). The other end of the support arm 122 is connected (e.g., welded or pinned) to the rail beam 121. A diagonal brace 124 may be disposed below the support arm 122, one end of the diagonal brace 124 being connected to the holster 102 and the other end being connected to the support arm 122. The diagonal braces 124 may serve as an auxiliary support so that the support arms 122 may withstand greater tension. A stay cable 125 may be disposed above the support arm 122, and one end of the stay cable 125 is connected to the jacket frame 102 and the other end is connected to the support arm 122. The stay cables 125 may serve as auxiliary supports so that the support arms 122 may bear a greater tensile force. It is of course also possible to provide a plurality of diagonal braces 124 to enhance the support of the support arms 122. For example: the number of the inclined supporting rods 124 is 2, and the two inclined supporting rods are arranged at the same height of the sleeve frame 102 at intervals.
As shown in fig. 2 to 3, in the present embodiment, the rail beam 121 extends toward a direction close to the hook. In a preferred embodiment, the rail beams 121 may be respectively coupled to the other ends (i.e., free ends) of the two support arms 122, and the rail beams 121 are disposed to extend horizontally so that the first lifting block 123 may be smoothly moved. The rail beam 121 may be machined from i-steel, and thus may carry a large force.
As shown in fig. 2 to 3, in the present embodiment, the first hoist 123 is connected to the rail beam 121, and the first hoist 123 may be used to hoist (or pull up) the attachment rod. The first hoist 123 may move back and forth along the rail beam 121. That is, the first hoist 123 may move in a direction approaching the hook along the rail beam 121, and may also move in a direction away from the hook. Both ends of the rail beam 121 may be respectively provided with a limiting plate for preventing the first hoist 123 from slipping. It should be noted that the first hoist 123 is a hoist that is commonly used in the art, and the structure and the operation manner thereof are known to those skilled in the art, and are not described herein again. The first hoist 123 is preferably an electric hoist (a wheel for moving the electric hoist along the rail beam 121 is mounted on the electric hoist).
In one embodiment of the present invention, the tower crane system further comprises a first operation platform 14 connected to the stock 102. The first operation platform 14 includes a bottom plate of a metal mesh sheet and a fence provided on the bottom plate (the fence can protect a constructor). The first work platform 14 may serve as a work platform for carrying the constructors. With the aid of this work platform, the constructor can mount the jib crane 12 to the jacket 102 and also manipulate the operation of the first hoist on the work platform, for example: the attachment rod pulled up by the first hoist 123 is connected to the hook, and the connection of the first hoist 123 to the attachment rod can be released. Additionally, a first hawser may be disposed on the first work platform 14. In the process of hanging and pulling the attachment rod by the lifting hook, the first guy rope can be connected with the attachment rod and tensioned, so that the attachment rod is prevented from shaking back and forth.
As shown in fig. 4 to 8, in an embodiment of the present invention, the tower crane system may further include a second operation platform 16. The second operation platform 16 includes a bottom plate of a metal mesh sheet and a fence provided on the bottom plate (the fence can protect a constructor). The second work platform 16 is removably mounted to a standard knot 104 attached to the attachment bar and the second work platform 16 is located below the first work platform 14. The second work platform 16 may serve as a work platform for carrying the construction personnel. With the work platform, the constructor can remove the attachment rod from the standard knot 104 and install the attachment rod to the first lifting block 123, can connect the attachment rod lifted by the first lifting block 123 to the hook, and can remove the connection between the first lifting block 123 and the attachment rod. In addition, a second guy rope can be arranged on the second operating platform 16, and the second guy rope can be connected with the attaching rod for tensioning, so that the attaching rod is prevented from shaking back and forth. Of course, the first and second guy wires may be the same guy wire.
As shown in fig. 4 to 8, in an embodiment of the present invention, the tower crane system may further include a second hoist 18. The second hoist 18 is mounted to the building structure, for example above or below the attachment point of the attachment bar. The second hoist 18 may hoist the attachment rod and may cooperate with the first hoist 123 to hoist and lower the attachment rod in a vertical posture. It should be noted that the second hoist 18 is a hoist that is commonly used in the art, and the structure and operation thereof are known to those skilled in the art and will not be described herein. The second hoist 18 is preferably a wire rope type lever hoist.
As shown in fig. 11-12, in one embodiment of the present invention, the tower crane system may include a third operations platform 22. The third operation platform 22 includes a bottom plate of a metal mesh sheet and a fence provided on the bottom plate (the fence can protect a constructor). The third operator station 22 is mounted to the holster 102 and is positioned below the first operator station 14. The third operation platform 22 may serve as a working platform for supporting a worker, and by means of the working platform, the worker may detach the attaching rod from the first hoist 123 and mount it to the hook of the tower crane body 10. Of course, the tower crane system may not be provided with the third operating platform 22, and the constructor may detach the attaching rod from the first hoist 123 and mount the attaching rod to the hook of the tower crane body 10 directly by means of the first operating platform 14 or the second operating platform 16. In addition, a third hawser may be provided on the third operations platform 22. In the process of hanging and pulling the attachment rod by the lifting hook, the third guy rope can be connected with the attachment rod and tensioned, so that the attachment rod is prevented from shaking back and forth. Of course, the first guy rope, the second guy rope and the third guy rope may be the same guy rope.
As shown in fig. 4 to 8, in an embodiment of the present invention, the tower crane system may further include a third hoist 20. The third hoist 20 is connected to the same standard knot 104 as the second operating platform 16, and the third hoist 20 is mounted higher than the second operating platform 16. The third hoist 20 may be connected to the attaching rod and hoisted simultaneously with the first hoist 123. The third hoist 20 prevents the attaching rod from rocking during the process of releasing the connection with the standard knot 104. Of course, the third hoist 20 may not be provided, but the movement of the attaching lever needs to be controlled more carefully when the attaching lever is disconnected from the standard knot 104. It should be noted that the third hoist 20 is a hoist that is commonly used in the art, and the structure and operation manner thereof are known to those skilled in the art and will not be described herein again. The third hoist 20 is preferably an inverted chain type chain block.
The first removal method of the attachment bar is described in detail below with reference to fig. 1 to 12.
As shown in fig. 1, the attachment rod is connected at one end to the building structure and at the other end to one standard knot 104 of the tower crane body 10 (specifically, the attachment rod is connected to one standard knot through one attachment frame).
In a first step, as shown in fig. 4 to 5, the wire rope of the first hoist 123 is lowered to the second operating platform 16, and then the wire rope thereof is connected to the attachment rod, and then the connection of the attachment rod to the standard knot 104 is released.
In addition, when the tower crane system is provided with the third hoist 20, the chain block of the third hoist 20 may be lowered and connected to the attaching rod, then the wire rope of the first hoist 123 may be connected to the attaching rod, and then the connection of the third hoist 20 and the attaching rod may be released. The chain block of the third hoist 20 prevents the attachment bar from swinging during the process of disconnecting the attachment bar from the standard knot 104.
In the second step, as shown in fig. 4 to 5, the wire rope of the second hoist block 18 is lowered, and then the wire rope thereof is connected to the attaching rod, and then the connection of the attaching rod to the building structure is released.
Third, as shown in fig. 6, the wire rope of the first hoist block 123 is lifted and simultaneously the wire rope of the second hoist block 18 is lowered, so that the attachment rod is slowly removed from the building structure. As shown in fig. 7, when the attachment bar is completely removed from the building structure, the first hoist 123 stops lifting. As shown in fig. 7 to 8, the lowering of the wire rope of the second hoist 18 is then continued until the attachment bar reaches the vertical attitude. The connection between the wire rope of the second hoist 18 and the attachment bar is then released. Of course, the operator can release the connection between the attachment bar and the second hoist 18 on the second work platform 16.
In the fourth step, the attaching rod is continuously pulled up by the first hoist 123 until the attaching rod reaches the first operation platform 14. As shown in fig. 9 to 10, the first hoist 123 is then controlled to move in a direction to approach the hook. The sling previously attached to the attachment bar is then connected (on the third operating platform 22) to the hook, as shown in fig. 11. Meanwhile, a first guy rope can be tied on the attachment rod (the first guy rope can prevent the attachment rod from shaking in the process of hoisting). The attachment rod is lifted by the hook until the wire rope of the first hoist 123 is loosened, and then the connection between the wire rope of the first hoist 123 and the attachment rod is released. As shown in fig. 12, the hook continues to move the attaching rod while slowly releasing the first guy rope, so that the attaching rod gradually changes from the inclined state to the vertical state (when the attaching rod is connected to the hook, the attaching rod is in an inclined posture because the first hoist 123 is difficult to move right under the hook). When the attachment bar is fully turned to the upright position, the first hawser is fully released. Then the attaching rod is hoisted to the ground through the tower crane body 10, thereby completing the detachment of the entire attaching rod.
A second method of detaching the attachment bar is described in detail below.
The first to third steps are the same as the first removal method, and are not described again.
And fourthly, continuously pulling up the attaching rod through the first lifting block 123 until the attaching rod reaches the third operating platform 22, and then controlling the first lifting block 123 to move towards the direction close to the lifting hook. The sling previously provided on the attachment bar is then connected (on the third operating platform 22) to the hook. Meanwhile, a third guy rope can be tied on the attachment rod (the third guy rope can prevent the attachment rod from shaking in the process of hoisting). The attachment rod is lifted by the hook until the wire rope of the first hoist 123 is loosened, and then the connection between the wire rope of the first hoist 123 and the attachment rod is released. Then the hook continues to drive the attaching rod to move, and at the same time the third guy rope is slowly loosened, so that the attaching rod gradually turns to the vertical state from the inclined state (since the first hoist 123 is difficult to reach right below the hook, the attaching rod is in a slightly inclined posture when being connected to the hook). When the attachment rod is completely turned to the vertical posture, the third guy rope is completely loosened, and then the attachment rod is hung to the ground through the tower crane body 10, thereby completing the detachment of the entire attachment rod.
A third method of detaching the attachment bar is described in detail below.
In the first step, the wire rope of the first hoist 123 is lowered to the second operating platform 16, and then the wire rope is connected to the attachment rod, and then the connection between the attachment rod and the standard knot 104 is released.
In addition, when the tower crane system is provided with the third hoist 20, the chain block of the third hoist 20 may be lowered and connected to the attaching rod, then the wire rope of the first hoist 123 may be connected to the attaching rod, and then the connection of the third hoist 20 and the attaching rod may be released.
In the second step, the wire rope of the second hoist block 18 is lowered, and then the wire rope is connected to the attachment rod, and then the attachment rod is disconnected from the building structure.
In a third step, the wire rope of the first hoist 123 is lifted and simultaneously the wire rope of the second hoist 18 is lowered, so that the attachment bar is slowly removed from the building structure. When the attachment bar is completely removed from the building structure, the first lifting block 123 stops lifting. And then the wire rope of the second hoist block 18 is continuously lowered until the attachment rod reaches the vertical posture. The connection between the wire rope of the second hoist 18 and the attachment bar is then released. Of course, the operator can release the connection between the attachment bar and the second hoist 18 on the second work platform 16.
And fourthly, controlling the first hoisting block 123 to move towards the direction close to the lifting hook. Then (on the third operating platform 22) the sling reserved on the attachment bar is connected to the hook, while a second guy rope can be tied on the attachment bar (the second guy rope can prevent the attachment bar from shaking during the hoisting process). The attachment rod is lifted by the hook until the wire rope of the first hoist 123 is loosened, and then the connection between the wire rope of the first hoist 123 and the attachment rod is released. Then the lifting hook continues to drive the attaching rod to move, and meanwhile, the second guy rope is slowly loosened, so that the attaching rod is gradually changed from the inclined state to the vertical state. When the attachment rod is completely turned to the vertical posture, the second guy rope is completely loosened, and then the attachment rod is hung to the ground through the tower crane body 10, thereby completing the detachment of the entire attachment rod.
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 it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A tower crane system, comprising:
the tower crane comprises a tower crane body, a lifting hook and a plurality of standard joints, wherein the tower crane body comprises a sleeve frame, the lifting hook can lift an attachment rod, and the standard joints are vertically connected in sequence;
the cantilever type travelling crane is connected to the sleeve frame and comprises a track beam, a first hoisting block and at least one supporting arm, one end of the supporting arm is connected with the sleeve frame, the other end of the supporting arm extends to a building structure connected with the attachment rod and is connected with the track beam, the first hoisting block is connected with the track beam and can move towards the direction close to or away from the lifting hook along the track beam, and the first hoisting block is used for hoisting the attachment rod;
the first operating platform is connected with the sleeve frame and used for bearing constructors, so that the constructors can detach the attachment rod from the first lifting hoist and mount the attachment rod to the lifting hook;
a second operation platform detachably connected with one standard knot, wherein the second operation platform is used for bearing constructors, so that the constructors can detach the attachment rod from one standard knot and install the attachment rod to the first lifting hoist, and can detach the attachment rod from the first lifting hoist and install the attachment rod to the lifting hook;
a second hoist for mounting to a building structure and for hoisting an attachment pole.
2. The tower crane system of claim 1, further comprising a third hoist connected to the same standard knot as the attachment bar, the third hoist being mounted higher than the second operating platform, the third hoist being configured to hoist the attachment bar.
3. A tower crane system according to claim 1, wherein the first operations platform is provided with a first guy cable which may be used for attaching an attachment rod.
4. A tower crane system according to claim 1, wherein the second operations platform is provided with a second guy cable which may be used for attaching an attachment rod.
5. The tower crane system of claim 1, further comprising a third operator platform connected to the jacket frame and located below the first operator platform, the third operator platform for carrying a worker such that the worker can remove an attachment bar from the first hoist and mount the attachment bar to the hook.
6. A tower crane system according to claim 5, wherein the third operations platform is provided with a third guy cable which may be used for attaching an attachment rod.
7. The tower crane system of claim 1, wherein the cantilevered traveling crane further comprises at least one brace and at least one stay cable, the support arm is coupled to the nest bracket by a pin, at least one brace supports at least one support arm, and at least one stay cable pulls at least one support arm.
8. The tower crane system of claim 1, wherein limiting plates are provided at both ends of the rail beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020174202.9U CN211971577U (en) | 2020-02-15 | 2020-02-15 | Tower crane system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020174202.9U CN211971577U (en) | 2020-02-15 | 2020-02-15 | Tower crane system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382272A (en) * | 2022-03-24 | 2022-04-22 | 中铁十七局集团建筑工程有限公司 | Construction device for building circular building |
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2020
- 2020-02-15 CN CN202020174202.9U patent/CN211971577U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382272A (en) * | 2022-03-24 | 2022-04-22 | 中铁十七局集团建筑工程有限公司 | Construction device for building circular building |
| CN114382272B (en) * | 2022-03-24 | 2022-06-07 | 中铁十七局集团建筑工程有限公司 | Construction device for building circular building |
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