CN115283990A - Large-scale equipment air pairing and hoisting method - Google Patents
Large-scale equipment air pairing and hoisting method Download PDFInfo
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- CN115283990A CN115283990A CN202210866563.3A CN202210866563A CN115283990A CN 115283990 A CN115283990 A CN 115283990A CN 202210866563 A CN202210866563 A CN 202210866563A CN 115283990 A CN115283990 A CN 115283990A
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Abstract
The invention discloses a method for hoisting large-scale equipment in an air assembly manner, which comprises the following steps: step one, hoisting a product separation tower in 6 sections, wherein the weight of each section exceeds 100t, and reserving a large field on site for placing sectional equipment; and step two, installing an operation platform at the head of the first section of the tower body, wherein the operation platform is positioned below the head lifting lug of the first section of the tower body, and four guide grooves are arranged on the operation platform along the circumferential direction in a pairwise symmetrical manner. The invention has high safety, the large crane is used in a centralized way, the use and the assembly and disassembly work amount of the scaffold are reduced, and the corresponding cost is also reduced.
Description
Technical Field
The invention relates to the field of chemical equipment installation. More particularly, the invention relates to a method for hoisting large-scale equipment in an air pairing mode.
Background
In recent years, the national chemical industry is developing towards low energy consumption, high efficiency, low pollution, large scale and oversize, and meanwhile, a mouth number of 'heavy safety and high quality' is provided for construction of the chemical industry, the higher the requirement on the safety of construction is, the higher the requirement on the engineering quality is, with the increasing upsizing of chemical devices, particularly, since 2020, a Propane Dehydrogenation (PDH) project blooms at multiple points, and a plurality of projects are put into production continuously, and meanwhile, the PDH project has the advantages of short process flow, small occupied area, less device investment, high yield and the like. Meanwhile, PDH is the cleanest production mode with low energy consumption and minimum carbon emission in the prior processes, and well fits the development route of clean energy in China. And because the PDH byproduct is high-purity low-cost hydrogen, and the demand of hydrogen energy has great potential, PDH can also fully utilize the additional value of the byproduct hydrogen, and the profit level of the device is improved. Creating more development opportunities.
The CTO course has been significantly reduced in the course of olefin development programs in the next few years. In the case of refining scales that are becoming increasingly restricted, the pace of development of oil routes will also appear to slow down. The PDH process accounts for 63.84% of the newly increased capacity in the future, the newly increased capacities of the oil olefin and the coal olefin are both limited, the PDH capacity exceeds that of the coal olefin to become a second propylene source which is only inferior to that of the oil olefin, and the capacity is released in a large scale in the future.
By the end of 2024, the domestic PDH/MDH capacity reaches about 14.00Mt/a, and the percentage of the domestic total propylene capacity reaches 26%. Compared with the prior art, the new technology is changed from the prior double-tower technology into the prior single-tower technology, the prior tower is about 90 meters high, the height of the post-process-change tower is about 128 meters, the equipment is delivered in sections due to road transportation, horizontal pairing conditions are not provided on site, aerial pairing is needed for hoisting, and the construction process requirement is higher.
Disclosure of Invention
The invention aims to provide an overhead assembling and hoisting method for large equipment, which has high safety, reduces the use and assembling and disassembling engineering amount of a scaffold by using a large crane in a centralized manner, and reduces corresponding cost.
The technical scheme adopted by the invention for solving the technical problem is as follows: a large-scale equipment aerial pairing hoisting method comprises the following steps:
step one, hoisting a product separation tower in 6 sections, wherein the weight of each section exceeds 100t, and reserving a large field for placing sectional equipment on site;
step two, installing an operation platform at the head of the first section of the tower body, wherein the operation platform is positioned below a head lifting lug of the first section of the tower body, four guide grooves are arranged on the operation platform along the circumferential direction in a pairwise symmetrical manner, each guide groove is of a top-removing conical structure, the diameter of the upper end of each guide groove is larger than that of the lower end of each guide groove, a first rail is arranged on the upper surface of the operation platform, the first rail is annular and is coaxially arranged with the first section of the tower body, a detection assembly is arranged below the operation platform and consists of a positioner, a suspension line pendant and a second rail, the second rail is coaxially arranged on the periphery of the first section of the tower body and is fixed with the bottom of the operation platform, the suspension line pendant is arranged on the second rail and can move along the circumferential direction, and a positioner is arranged at the cone end of the suspension line pendant;
step three, hoisting the first section of the tower body in place by adopting a single-host hoisting delivery method of a crane to lift the first section of the product separation tower in place, taking a 2000t crawler crane as a main hoisting tool to lift the head of the tower body, completing the whole process from hoisting and raising the head to placing in place, and matching the tail and the slide of the 400t crawler crane;
before the second section of the tower body is hoisted, the head of the second section of the tower body is constructed according to the head of the first section of the tower body in the second step, the operation platform is installed, a support is installed at the tail of the second section of the tower body, four guide joints are fixedly arranged on the support in a penetrating manner, the guide joints are of cylindrical structures, the lower parts of the guide joints are connected with oil cylinder supporting legs, the guide joints correspond to the guide grooves of the first section of the tower body one by one, the diameters of the guide joints and the oil cylinder supporting legs are smaller than the diameter of the bottom surface of the guide grooves, a detection assembly and an image pickup head are installed below the support, the detection assembly is composed of a positioner, a suspension line weight and a second rail, the second rail is coaxially arranged at the periphery of the second section of the tower body and is fixed with the bottom of the support, the suspension line weight and the camera are installed on the second rail and can move along the circumferential direction, and the positioner is installed at the cone end of the suspension line weight;
hoisting the second section of the tower body according to the third step, so that the guide joint of the second section of the tower body penetrates into the guide groove of the first section of the tower body, and the oil cylinder support leg is lifted up by the oil cylinder support leg to support the oil cylinder support leg in the guide groove, thereby completing the coarse butt joint of the second section of the tower body and the first section of the tower body;
sixthly, mounting a lifting support seat on the first rail, enabling the support seat to move along the first rail, arranging a jack on the support seat, enabling the support seat to be lifted to a position where the jack can horizontally extend to the second section of the tower body, arranging the jack to horizontally extend and enabling the axis of the jack to penetrate through the axis of the second section of the tower body, and fixing a positioner on the jack;
step seven, fine adjustment between the second section of the tower body and the first section of the tower body; with first track, second track, locator, hydro-cylinder landing leg, jack, camera all with the PLC controller connection, the second orbital motion on PLC controller control tower body first section and the tower body second section: 1) Adjusting the left and right sides of the first section of the tower body and the second section of the tower body: the camera moves for a circle along the second track and shoots beyond the lower part, according to the monitoring of the camera on the first section and the second section of the tower body, the PLC controller controls the upper group of suspension line pendants and the lower group of suspension line pendants to move to one side of the outer side surface of the second section of the tower body, which protrudes out of the outer side surface of the first section of the tower body, so that the Y-axis coordinate of the positioner corresponding to the outer side surface of the second section of the tower body is the same as the Y-axis coordinate of the positioner corresponding to the outer side surface of the first section of the tower body, and the PLC controller obtains the X-axis coordinate of the positioner corresponding to the outer side surfaces of the first section and the second section of the tower body and calculates the difference L between the X-axis coordinate and the X-axis coordinate of the positioner corresponding to the outer side surfaces of the first section and the second section of the tower body 1 The PLC controls the support seat to move to the same Y-axis coordinate of the positioner on the jack as the Y-axis coordinate of the positioner corresponding to the outer side surface of the second section of the tower body, and then controls the jack to push the second section of the tower body by a distance L 1 As shown in FIG. X; 2) Adjusting the front and rear sides, front and rear sides of the first section and the second section of the tower bodyThe included angle between the two sides and the left and right sides is 90 degrees, as shown in figure X, the specific method is the same as 1); 3) The precise positioning between the second section of the tower body and the first section of the tower body can be realized by the reciprocating adjustment, the aerial team welding is carried out, and the 2000t crawler crane is withdrawn;
and step eight, finishing the installation of the rest tower body sections according to the steps.
Preferably, in the third step, when the 2000t crawler crane and the 400t crawler crane are transported to the site, the head lifting lugs are horizontally and symmetrically arranged on the left side and the right side of the head of the first section of the tower body and are lifted by the 2000t crawler crane, and the plate-type tail sliding lifting lugs are arranged on the same side of the lower part of the first section of the tower body and are lifted by the 400t crawler crane.
Preferably, the 2000t crawler crane is applied to the head lifting lug at the first section of the tower body, the 400t crawler crane is applied to the tail sliding lifting lug at the lower part of the first section of the tower body, along with the lifting of the 2000t crawler crane, the upper part of the first section of the tower body starts to lift, the 400t crawler crane sends the tail forwards, the 2000t crawler crane continues to lift, the 400t crawler crane slowly rotates the rod until the tower body reaches the upright state, and the sling of the tail sending crane is loosened;
the main crane rotating rod is aligned with the position of the tower foundation, the hook is lifted to enable the tail of the first section of the tower body to exceed the concrete foundation elevation by about 600mm, and the rod begins to lie down, raise the hook and lie down slowly until the tower base is positioned right above the foundation and then falls down the first section of the tower body slowly; and correcting and fixing the foundation bolts at the first section of the tower body.
Preferably, after the first section and the second section of the tower body are assembled, the detection assembly, the operation platform and the equipment on the operation platform at the first section of the tower body are disassembled, and the bracket, the detection assembly and the camera at the second section of the tower body are disassembled for the installation of the third section of the tower body.
The invention at least comprises the following beneficial effects:
1) The 2000t crawler crane is adopted, the safety is high, the large crane is used in a centralized manner, the use amount of scaffolds, the construction amount of assembling and disassembling are reduced, and the corresponding cost is also reduced;
2) The accurate positioning of the adjacent tower bodies is completed through the controller, the first rail, the second rail, the positioner, the oil cylinder supporting legs, the jacks and the cameras, and the working efficiency is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic aerial fleet illustration of a first section of a tower and a second section of a tower of the present invention;
fig. 2 is a schematic view of the second section of the tower and the first section of the tower according to the invention with fine tuning.
Description of reference numerals: the tower body comprises a first section of a tower body 1, a 2-stage operation platform, a 3 2000t crawler crane, a 4-type guide groove, a 5-type second rail, a 6-type suspension line weight, a 7-type second section of the tower body, 8-type oil cylinder supporting legs, 9-type guide sections, 10 supporting seats and 11 jacks.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before describing the present invention in detail with reference to the accompanying drawings, it is to be noted that: the technical solutions and features provided in the present invention in each part including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only some embodiments of the present invention, and not all embodiments. Therefore, all other embodiments that can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention shall fall within the scope of protection of the present invention.
The invention is further described in detail with reference to the accompanying drawings and implementation, and the specific implementation process is as follows:
as shown in fig. 1, the invention provides a method for hoisting large-scale equipment by air pairing, which comprises the following steps:
step one, hoisting a product separation tower in 6 sections, wherein the weight of each section exceeds 100t, the product separation tower still belongs to ultra-large equipment, and a large field needs to be reserved in the field for placing the sectional equipment; the product-separating column (05 DA-5001) was hoisted in 6 stages. And the equipment is hoisted in place by adopting a hoisting mode of directly hoisting the single host in place according to the fact that the equipment is vertical equipment.
Step two, installing an operation platform 2 at the head of the first section 1 of the tower body, wherein the operation platform 2 is positioned below a head lifting lug of the first section 1 of the tower body, four guide grooves 4 are arranged on the operation platform 2 in a pairwise symmetrical manner along the circumferential direction, the guide grooves 4 are of a top-removing conical structure, the diameter of the upper end of each guide groove is larger than that of the lower end of each guide groove, a first rail is arranged on the upper surface of the operation platform 2, the first rail is annular and is coaxially arranged with the first section 1 of the tower body, a detection assembly is arranged below the operation platform 2, the detection assembly is composed of a positioner, a suspension line weight 6 and a second rail 5, the second rail 5 is coaxially arranged at the periphery of the first section 1 of the tower body and is fixed with the bottom of the operation platform 2, the suspension line weight 6 is arranged on the second rail 5 and can move along the circumferential direction, and the positioner is arranged at the cone end of the suspension line weight 6;
step three, hoisting the first section 1 of the tower body in place by adopting a single-host hoisting delivery method of a crane, taking a ZCC32000 type 2000t crawler crane 3 as a main hoisting tool to hoist the head of the tower body, completing the whole process from hoisting and raising to taking place, and matching the tail and the head of the ZCC5200 type 400t crawler crane;
before the second tower section 7 is hoisted, the head of the second tower section 7 is constructed according to the head of the first tower section 1 in the second step, the operation platform 2 is installed, a support is installed at the tail of the second tower section 7, four guide joints 9 are fixedly arranged on the support in a penetrating manner, each guide joint 9 is of a cylindrical structure, the lower part of each guide joint is connected with an oil cylinder supporting leg 8, the guide joints 9 correspond to the guide grooves 4 of the first tower section 1 one by one, the diameters of the guide joints 9 and the oil cylinder supporting legs 8 are smaller than the diameter of the bottom surface of each guide groove 4, a detection assembly and a camera are installed below the support, each detection assembly consists of a positioner, a suspension line weight 6 and a second rail 5, the second rail 5 is coaxially arranged at the periphery of the second tower section 7 and is fixed with the bottom of the support, the suspension line weight 6 and the camera are installed on the second rail 5 and can move along the circumferential direction, and the positioner is installed at the cone end of the suspension line weight 6;
step five, hoisting the second tower body section 7 according to the step three, enabling a guide joint 9 of the second tower body section 7 to penetrate into a guide groove 4 of the first tower body section 1, jacking through an oil cylinder supporting leg 8, and enabling the oil cylinder supporting leg 8 to be supported in the guide groove 4, so as to finish coarse butt joint of the second tower body section 7 and the first tower body section 1;
sixthly, mounting a lifting support seat 10 on the first rail, so that the support seat 10 can move along the first rail, wherein a jack 11 is arranged on the support seat 10, the support seat 10 is lifted to enable the jack 11 to horizontally jack the second tower body section 7, the jack 11 is arranged to horizontally jack and the axis of the jack passes through the axis of the second tower body section 7, and a positioner is fixed on the jack 11;
step seven, fine adjustment between the second section 7 of the tower body and the first section 1 of the tower body; with first track, second track 5, locator, hydro-cylinder landing leg 8, jack 11, camera all with the PLC controller connection, the second track 5 motion on PLC controller control tower body first section 1 and tower body second section 7: 1) The left and right sides of the first section 1 of the adjusting tower body and the second section 7 of the adjusting tower body: the camera moves for a circle along the second track 5 and shoots beyond the lower part, according to the monitoring of the camera on the first section 1 and the second section of the tower body, the PLC controller controls the upper and the lower groups of suspension line pendulums 6 to move to one side of the outer side surface of the second section 7 of the tower body which protrudes out of the outer side surface of the first section 1 of the tower body, so that the Y-axis coordinate of the positioner corresponding to the outer side surface of the second section 7 of the tower body is the same as the Y-axis coordinate of the positioner corresponding to the outer side surface of the first section 1 of the tower body, the PLC controller obtains the X-axis coordinate of the positioners corresponding to the outer side surfaces of the first section 1 and the second section of the tower body and calculates the difference L between the X-axis coordinate and the X-axis coordinate of the positioners corresponding to the outer side surfaces of the first section 1 and the second section of the tower body 1 The PLC controls the Y-axis coordinate of a locator, which moves the supporting seat 10 to the jack 11, to be the same as the Y-axis coordinate of a locator corresponding to the outer side surface of the second tower section 7, and then controls the jack 11 to push the second tower section 7 by a distance L 1 As shown in fig. 2; 2) Adjusting the front side and the rear side of the first section 1 and the second section 7 of the tower body, wherein the included angle between the front side and the rear side and the left side and the right side is 90 degrees, as shown in fig. 2, the specific method is the same as 1); 3) The precise positioning between the second section 7 of the tower body and the first section 1 of the tower body can be realized through the reciprocating adjustment, the aerial group welding is carried out, and the 2000t crawler crane is withdrawn；
And step eight, finishing the installation of the rest tower body sections according to the steps.
The technical scheme can also comprise the following technical details so as to better realize the technical effects:
in the third step, when the 2000t crawler crane and the 400t crawler crane are transported to the site, the head lifting lugs are horizontally and symmetrically arranged on the left side and the right side of the head of the first section 1 of the tower body and lifted by the 2000t crawler crane, and the plate type tail sliding lifting lugs are arranged on the same side of the lower part of the first section 1 of the tower body and lifted by the 400t crawler crane.
The technical scheme can also comprise the following technical details so as to better realize the technical effects:
the 2000t crawler crane is stressed on the head lifting lug of the first section 1 of the tower body, the 400t crawler crane is stressed on the tail sliding lifting lug at the lower part of the first section 1 of the tower body, along with the lifting of the 2000t crawler main crane, the upper part of the first section 1 of the tower body starts to lift, the 400t crawler crane sends the tail forward, the 2000t crawler crane continues to lift, the 400t crawler crane slowly rotates the rod until the tower body reaches the upright state, and the sling of the tail sending crane is loosened;
the main crane rotating rod is aligned with the position of the tower foundation, the hook is lifted to enable the tail of the first section 1 of the tower body to slowly bend over the rod, the hook is lifted, and the rod bends over when the tail of the first section 1 of the tower body exceeds the concrete foundation by about 600mm, and the first section 1 of the tower body is slowly dropped in place until the tower base is positioned right above the foundation; and (5) correcting and fixing foundation bolts of the first section 1 of the tower body.
The technical scheme can also comprise the following technical details so as to better realize the technical effects:
after the first section 1 and the second section 7 of the tower body are assembled, the detection assembly, the operation platform 2 and equipment on the operation platform of the first section 1 of the tower body are removed, and the support, the detection assembly and the camera of the second section 7 of the tower body are removed for installing the third section of the tower body.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details and embodiments shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (4)
1. A method for hoisting large-scale equipment in an air pairing mode is characterized by comprising the following steps:
step one, hoisting a product separation tower in 6 sections, wherein the weight of each section exceeds 100t, and reserving a large field on site for placing sectional equipment;
step two, installing an operation platform at the head of the first section of the tower body, wherein the operation platform is positioned below a head lifting lug of the first section of the tower body, four guide grooves are arranged on the operation platform in a pairwise symmetrical manner along the circumferential direction, the guide grooves are of a top-removing conical structure, the diameter of the upper end of each guide groove is larger than that of the lower end of each guide groove, a first rail is arranged on the upper surface of the operation platform, the first rail is annular and is coaxially arranged with the first section of the tower body, a detection assembly is arranged below the operation platform, the detection assembly is composed of a positioner, a suspension line weight and a second rail, the second rail is coaxially arranged on the periphery of the first section of the tower body and is fixed with the bottom of the operation platform, the suspension line weight is arranged on the second rail and can move along the circumferential direction, and a positioner is arranged at the cone end of the suspension line weight;
thirdly, hoisting the first section of the tower body in place by adopting a single-host lifting and delivering method of a crane, taking a 2000t crawler crane as a main hoisting tool to hoist the head of the tower body, completing the whole process from lifting to taking place, and matching the tail and the tail of the 400t crawler crane;
before the second section of the tower body is hoisted, the head of the second section of the tower body is constructed according to the head of the first section of the tower body in the second step, the operation platform is installed, a support is installed at the tail of the second section of the tower body, four guide joints are fixedly arranged on the support in a penetrating manner, the guide joints are of cylindrical structures, the lower parts of the guide joints are connected with oil cylinder supporting legs, the guide joints correspond to the guide grooves of the first section of the tower body one by one, the diameters of the guide joints and the oil cylinder supporting legs are smaller than the diameter of the bottom surface of the guide grooves, a detection assembly and a camera are installed below the support, the detection assembly is composed of a positioner, a suspension line weight and a second rail, the second rail is coaxially arranged at the periphery of the second section of the tower body and is fixed with the bottom of the support, the suspension line weight and the camera are installed on the second rail and can move along the circumferential direction, and the positioner is installed at the cone end of the suspension line weight;
hoisting the second section of the tower body according to the third step, so that the guide joint of the second section of the tower body penetrates into the guide groove of the first section of the tower body, and the oil cylinder support leg is lifted up by the oil cylinder support leg to support the oil cylinder support leg in the guide groove, thereby completing the coarse butt joint of the second section of the tower body and the first section of the tower body;
sixthly, mounting a lifting support seat on the first rail, enabling the support seat to move along the first rail, arranging a jack on the support seat, enabling the support seat to be lifted to a position where the jack can horizontally extend to the second section of the tower body, arranging the jack to horizontally extend and enabling the axis of the jack to penetrate through the axis of the second section of the tower body, and fixing a positioner on the jack;
step seven, fine adjustment between the second section of the tower body and the first section of the tower body; with first track, second track, locator, hydro-cylinder landing leg, jack, camera all with the PLC controller connection, the second orbital motion on PLC controller control tower body first section and the tower body second section: 1) Adjusting the left and right sides of the first section of the tower body and the second section of the tower body: the camera moves for a circle along the second track and shoots beyond the lower part, according to the monitoring of the first section and the second section of the tower body by the camera, the PLC controller controls the upper and the lower groups of suspension line pendulums to move to one side of the outer side surface of the second section of the tower body, which protrudes out of the outer side surface of the first section of the tower body, so that the Y-axis coordinate of the positioner corresponding to the outer side surface of the second section of the tower body is the same as the Y-axis coordinate of the positioner corresponding to the outer side surface of the first section of the tower body, and the PLC controller obtains the X-axis coordinate of the positioner corresponding to the outer side surfaces of the first section and the second section of the tower body and calculates the difference L between the X-axis coordinate and the X-axis coordinate of the positioner 1 The PLC controls the support seat to move to the same Y-axis coordinate of a positioner on the jack as the Y-axis coordinate of a positioner corresponding to the outer side surface of the second section of the tower body, and then controls the jack to push the second section of the tower body by a distance L 1 (ii) a 2) Adjusting the front side and the rear side of the first section of the tower body and the front side and the rear side of the second section of the tower body, wherein the included angle between the front side and the rear side and the left side and the right side is 90 degrees, and the specific method is the same as 1); 3) Are reciprocally adjusted in such a way thatThe second section of the tower body and the first section of the tower body can be accurately positioned, air team welding is carried out, and the 2000t crawler crane is withdrawn;
and step eight, finishing the installation of the rest tower body sections according to the steps.
2. The overhead pairing hoisting method for large equipment according to claim 1, wherein in the third step, when the 2000t crawler crane and the 400t crawler crane are transported to the site, the head lifting lugs are horizontally and symmetrically arranged on the left side and the right side of the head of the first section of the tower body and hoisted by the 2000t crawler crane, and the plate-type tail-slipping lifting lugs are arranged on the same side of the lower part of the first section of the tower body and hoisted by the 400t crawler crane.
3. The overhead pairing hoisting method for the large equipment according to claim 2, wherein the 2000t crawler crane is applied to the head lifting lug of the first section of the tower body, the 400t crawler crane is applied to the lower tail-sliding lifting lug of the first section of the tower body, the upper part of the first section of the tower body starts to lift along with the hoisting of the 2000t crawler main crane, the 400t crawler crane sends the tail forward, the 2000t crawler crane continues to hoist, the 400t crawler crane slowly rotates the rod until the tower body reaches the upright state, and the sling of the tail-conveying crane is loosened;
the main crane rotating rod is aligned with the position of the tower foundation, the hook is lifted to enable the tail of the first section of the tower body to exceed the concrete foundation elevation by about 600mm, and the rod begins to lie down, raise the hook and lie down slowly until the tower base is positioned right above the foundation, and then the first section of the tower body is slowly dropped to be in place; and correcting and fixing the foundation bolts at the first section of the tower body.
4. The overhead pairing hoisting method for large-scale equipment according to claim 1, wherein after the first section of the tower body and the second section of the tower body are assembled, the detection assembly, the operation platform and the equipment thereon of the first section of the tower body are removed, and the bracket, the detection assembly and the camera of the second section of the tower body are removed for the installation of the third section of the tower body.
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| JP2022072426A (en) * | 2020-10-29 | 2022-05-17 | トヨタ自動車九州株式会社 | Hanger device and drive system of rotary tower where hanger device is installed |
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