CN116025213A - Large-scale tower and construction method - Google Patents
Large-scale tower and construction method Download PDFInfo
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- CN116025213A CN116025213A CN202211686428.7A CN202211686428A CN116025213A CN 116025213 A CN116025213 A CN 116025213A CN 202211686428 A CN202211686428 A CN 202211686428A CN 116025213 A CN116025213 A CN 116025213A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention discloses a large-scale tower and a construction method, wherein the large-scale tower is divided into five sections A, B, C, D, E; the large section B is divided into sections B1 and B2, the large section C is divided into sections C1 and C2, and the large section D is divided into sections D1 and D2; the total score is constructed in eight sections; the construction method comprises the following steps: procedure one, build A, B, B2, C1, C2, D1, D2 and E segments; step two, heat treatment is carried out on each segment, and B1 and B2, C1 and C2 and D1 and D2 are folded in the middle after the heat treatment; step three, installing tower internals according to the section A, B, C, D; the invention has the beneficial effects that: the manufacturing method has the advantages that the inter-bay sectional manufacturing is adopted, the independent sections are assembled in a middle-fold and a large-fold mode, the limitation of the size of the factory space to the operation of the large-scale tower is reduced, the limitation of the lifting capacity of the factory is avoided, the limitation of the size of the space of the heat treatment furnace is avoided, the resources in the factory can be used more reasonably, and the manufacturing cost of enterprises is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of tower construction, and particularly relates to a large-scale tower and a construction method.
Background
In recent years, with the continuous growth and expansion of the global main petrochemical equipment and other reasons, the domestic chemical industry is rapidly developed, and a complete industrial chain of chemical energy equipment is formed from oil refining to refining and then to chemical machinery and chemical products; the large-scale tower occupies the important operation in petrochemical equipment, and directly or indirectly affects the productivity of the whole project; the large-scale tower has the disadvantages of more process links, large sectional weight, difficult precision control and more influencing factors in the actual construction process.
Disclosure of Invention
The invention aims to provide a large-scale tower and a construction method thereof, which reduce the limit on the field, avoid the limit on the hoisting tonnage and span of a workshop and enable the field resources to be reasonably distributed and used.
In order to achieve the above purpose, the present invention provides the following technical solutions: a large-scale tower is formed by splicing a plurality of cylinder sections and end sockets, wherein each cylinder section is formed by rolling a steel plate; the device comprises a section A, a section B, a section C, a section D and a section E, wherein one end socket is respectively arranged in the section A and the section D, the section B consists of sections B1 and B2, the section C consists of sections C1 and C2, and the section D consists of sections D1 and D2.
As a preferable technical scheme of the invention, the section A is formed by connecting two cylinder sections with different diameters through cone reducing, and the upper end is sealed by a sealing head.
As a preferable technical scheme of the invention, the section B is formed by connecting two cylinder sections with different diameters through cone reducing.
As a preferable technical scheme of the invention, the section C is formed by connecting a plurality of cylinder sections with the same diameter.
As a preferable technical scheme of the invention, the section D is formed by connecting a plurality of cylinder sections with the same diameter, and the lower end of the section D is sealed by a sealing head.
As a preferable technical scheme of the invention, the E section is formed by connecting a plurality of cylinder sections with the same diameter with a base ring.
The invention also discloses a construction method of the large-scale tower, which comprises the following steps:
procedure one, build A, B1, B2, C1, C2, D1, D2 and E segments, and includes the steps of:
firstly, stacking sectional cylindrical sections one by one in a workshop, wherein cylindrical sections with large diameters are arranged below, cylindrical sections with small diameters are arranged above, backing welding is adopted between cylindrical sections except for the section A, and then the cylindrical sections are turned over to a roller frame for welding by submerged arc welding; the rest B1, B2, C1, C2, D1, D2 and E segments are all constructed by manual welding;
step two, carrying out nondestructive testing on all the segmented longitudinal girth welds, and transporting the longitudinal girth welds to an external field after the longitudinal girth welds are qualified;
in the second flow, heat treatment is carried out on each segment, and B1 and B2, C1 and C2 and D1 and D2 are folded in the middle after the heat treatment:
according to the size of a heat treatment furnace, carrying out heat treatment arrangement on each segment, wherein the segment A adopts horizontal arrangement, and the rest segments are vertically arranged to ensure the quality of the heat treatment of the segments in order to prevent deformation in the heat treatment process of the rest segments;
step two, folding the sections B1, B2, C1, C2, D1 and D2 into sections B, C and D respectively;
process three, installing tower internals according to section A, B, C, D, and comprising the steps of:
step one, vertically arranging a subsection A, B, C, D on an external field, and horizontally aligning the opening of the subsection tower to ensure the verticality of the subsection tower body;
step two, because the diameter of the large-scale tower is large, the tower internals are heavier, and the automobile crane is adopted for installation, and the tower internals are installed layer by layer from the bottom of the section;
and a fourth process, namely hanging the segment A, B, C, D, E to a folding jig frame to carry out large folding, wherein the method comprises the following steps of:
the method comprises the steps that firstly, turning hanging yards are respectively arranged on a subsection A, B, C, D, E, the turning hanging yards are required to be provided with anti-tilting toggle plates, stability and safety of the subsection turning process are ensured, and a barrel anti-deformation support is required to be arranged at the turning hanging yards;
step two, arranging the large folding jig frame in advance to ensure the alignment of the horizontal centers of the large folding jig frame;
step three, sequentially hanging A, B, C, D, E sections of the tower to a large folding jig frame through a 1000T gantry crane, and carrying out treatment welding on a large folding opening;
and a fifth process, namely conveying the whole tower to a hydraulic test platform for hydraulic test, wherein the hydraulic test comprises the following steps:
step one, adopting a module trolley to lighte the whole tower to a water pressure platform;
step two, carrying out integral inspection on the large-scale tower before hydraulic pressure, and installing a hydraulic blind plate to carry out hydraulic pressure test according to a hydraulic pressure test process after the inspection is finished;
a sixth process of packaging and shipping, comprising the following steps:
step one, performing rust removal and paint coating on a large-sized tower after water pressure;
installing a delivery blind plate at the pipe orifice, and filling nitrogen into the nitrogen sealed cabin;
and thirdly, adopting a module trolley to transfer the large tower to a transport ship for delivery.
As a preferable technical scheme of the invention, in the step of the fourth flow, two cylinder inner walls on one side of the section are required to be arranged by the adopted turning-over hanging code, the other side of the section is the outside of the cylinder, the upper opening is arranged on the inner wall and the lower opening is arranged on the outside during turning over; the turning lifting lug comprises a lifting lug plate, a reinforcing plate, a toggle plate and a backing plate; the lifting lug plate is a main body of the lifting weight and is provided with a lifting hole, the reinforcing plate is two annular plates of the lifting hole, and the two annular plates are arranged on two sides of the lifting lug plate; the anti-tilting toggle plate is of a T-shaped structure and is arranged at two sides of the lifting lug; the base plate is connected with the hung object, the lifting lug plate and the toggle plate.
As a preferable technical scheme of the invention, when the step of the fourth process is carried out, the turning-over hanging code is set according to the step, and the sectional azimuth after turning over is considered.
Compared with the prior art, the invention has the beneficial effects that:
the inter-bay sectional manufacturing is adopted, the independent sections are assembled in a middle folding mode and a large folding mode in an external field, the limit of the size of the factory building space to the operation of the large-scale tower is reduced, the limit of the lifting capacity of the factory building can be avoided, the limit of the size of the space of the heat treatment furnace can be avoided, the resources in the factory can be used more reasonably, and the manufacturing cost of enterprises is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a state diagram of a second embodiment of the present invention;
FIG. 3 is a state diagram of a fourth embodiment of the present invention;
fig. 4 is a state diagram of a fifth embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, in an embodiment of the present invention, a large-scale tower is provided, where a plurality of shell sections and seal heads are spliced, and each shell section is formed by rolling a steel plate; the section A of the tower is formed by connecting two cylindrical sections with different diameters through cone reducing, and the upper end of the section A is sealed by an end socket; the tower section B is formed by connecting two cylindrical sections with different diameters through cone reducing; the C section of the tower is formed by connecting a plurality of cylindrical sections with the same diameter; the tower section D is formed by connecting a plurality of cylindrical sections with the same diameter, and the lower end of the tower section D is sealed by an end socket; the tower E section is formed by connecting a plurality of cylindrical sections with the same diameter with a foundation ring; the large-scale tower consists of a section A, a section B, a section C, a section D and a section E, wherein one end socket is respectively arranged in the section A and the section D, the section B consists of a section B1 and a section B2, the section C consists of a section C1 and a section C2, and the section D consists of a section D1 and a section D2.
The construction method of the large-scale tower comprises the following steps:
procedure one, build A, B1, B2, C1, C2, D1, D2 and E segments, and includes the steps of:
firstly, stacking sectional cylindrical sections one by one in a workshop, wherein cylindrical sections with large diameters are arranged below, cylindrical sections with small diameters are arranged above, backing welding is adopted between cylindrical sections except for the section A, and then the cylindrical sections are turned over to a roller frame for welding by submerged arc welding; the rest B1, B2, C1, C2, D1, D2 and E segments are all constructed by manual welding;
step two, carrying out nondestructive testing on all the segmented longitudinal girth welds, and transporting the longitudinal girth welds to an external field after the longitudinal girth welds are qualified;
in the second flow, heat treatment is carried out on each segment, and B1 and B2, C1 and C2 and D1 and D2 are folded in the middle after the heat treatment:
according to the size of a heat treatment furnace, carrying out heat treatment arrangement on each segment, wherein the segment A adopts horizontal arrangement, and the rest segments are vertically arranged to ensure the quality of the heat treatment of the segments in order to prevent deformation in the heat treatment process of the rest segments;
step two, folding the sections B1, B2, C1, C2, D1 and D2 into sections B, C and D respectively;
process three, installing tower internals according to section A, B, C, D, and comprising the steps of:
step one, vertically arranging a subsection A, B, C, D on an external field, and horizontally aligning the opening of the subsection tower to ensure the verticality of the subsection tower body;
step two, because the diameter of the large-scale tower is large, the tower internals are heavier, and the automobile crane is adopted for installation, and the tower internals are installed layer by layer from the bottom of the section;
and a fourth process, namely hanging the segment A, B, C, D, E to a folding jig frame to carry out large folding, wherein the method comprises the following steps of:
the method comprises the steps that firstly, turning hanging yards are respectively arranged on a subsection A, B, C, D, E, the turning hanging yards are required to be provided with anti-tilting toggle plates, stability and safety of the subsection turning process are ensured, and a barrel anti-deformation support is required to be arranged at the turning hanging yards; the adopted turning-over hanging bracket is provided with two barrel inner walls at one side of the section, the other side of the section is the outside of the barrel, the upper opening is arranged on the inner wall when the user turns over, and the lower opening is arranged on the outside; the turning lifting lug comprises a lifting lug plate, a reinforcing plate, a toggle plate and a backing plate; the lifting lug plate is a main body of the lifting weight and is provided with a lifting hole, the reinforcing plate is two annular plates of the lifting hole, and the two annular plates are arranged on two sides of the lifting lug plate; the anti-tilting toggle plate is of a T-shaped structure and is arranged at two sides of the lifting lug; the hoisted object, the lifting lug plate and the toggle plate are connected by the base plate, so that the hoisted object is prevented from being pulled apart in the hoisting process; the turning-over hanging yards are arranged according to the consideration of the sectional azimuth after turning over;
step two, arranging the large folding jig frame in advance to ensure the alignment of the horizontal centers of the large folding jig frame;
step three, sequentially hanging A, B, C, D, E sections of the tower to a large folding jig frame through a 1000T gantry crane, and carrying out treatment welding on a large folding opening;
and a fifth process, namely conveying the whole tower to a hydraulic test platform for hydraulic test, wherein the hydraulic test comprises the following steps:
firstly, because the water pressure weight of a large-scale tower exceeds 3000T, a conventional site cannot bear the weight and needs to be transported to a special water pressure platform, the body weight of the large-scale tower is too large, 1000T in a factory cannot be lifted, and only a module trolley can be used for transporting the whole tower onto the water pressure platform;
step two, carrying out integral inspection on the large-scale tower before hydraulic pressure, and installing a hydraulic blind plate to carry out hydraulic pressure test according to a hydraulic pressure test process after the inspection is finished;
a sixth process of packaging and shipping, comprising the following steps:
step one, performing rust removal and paint coating on a large-sized tower after water pressure;
installing a delivery blind plate at the pipe orifice, and filling nitrogen into the nitrogen sealed cabin;
and thirdly, adopting a module trolley to transfer the large tower to a transport ship for delivery.
The invention relates to a large-scale tower and a construction method thereof, which have the following characteristics:
1) The section A is formed by connecting two cylindrical sections with different diameters through cone reducing, the sectional diameter and the wall thickness are proper, and the section A can be horizontally arranged on a roller frame and manufactured by submerged arc welding; the key point of the manufacture is that the diameter-variable roller frames are arranged, the stability is ensured, and the central lines of the cylinders at the two ends of different diameters are aligned; when two sections of cylinders are folded by the cone, as the roller frame and the pairing machine are horizontally folded, the influence of a plurality of factors can occur on site, such as: uneven ground and irregular tool use often cause uneven straightness when the cone sections are folded, and the straightness and the interface size of the cone sections can be ensured to meet the requirements by slowly adjusting the jacking stroke of the team forming machine;
2) Except for the section A, the rest B, C, D, E sections are built vertically, one section of the cylindrical sections is overlapped upwards, manual welding is used, the cylindrical section at the lowest end is required to be placed on a horizontal jig, straightness and verticality are required to be controlled between each cylindrical section, the diameter of the cylindrical section is large, roundness control of the cylindrical section is difficult when the cylindrical section is assembled under the condition that the wall thickness is not thick, a circle supporting tool is required to be arranged inside the cylindrical section, and assembly precision between the cylindrical sections is ensured;
3) The large-scale tower is made of carbon steel materials, and needs heat treatment after manufacturing, but normal heat treatment cannot meet the requirement of feeding the whole tower into the furnace, and sectional heat treatment is generally adopted; therefore, the tower body can be reasonably segmented, the existing resources can be used in a limited way, and the manufacturing cost is saved; the large-scale tower is divided into A, B, C, D, E five sections, and the heat treatment is not needed for the tower internal parts, so that the sealing heads at the two ends can not be installed temporarily and can only be subjected to the separate heat treatment; in order to control uncontrollable deformation in the sectional heat treatment process, except for the section A, a horizontal type placing heat treatment mode is adopted, the other sections are all in a vertical type heat treatment mode, and reinforcing supports are arranged at weak positions of the sections;
4) The arrangement of the large tower section turning hanging yards and the selection of hanging yards have important significance; the large-scale tower section is required to be provided with tower internals, the tower internals are generally heavy and are required to be constructed by means of travelling crane or automobile crane, the tower section is upright, and horizontal installation cannot be adopted; therefore, after the installation of the sectional tower internals is completed, the arrangement of the turning-over hanging yards is indispensable, and the overall weight is increased by at least more than 100T after the sectional installation of internals; the method is characterized in that the method adopts 1000T to perform sectional turning in an external field, the upper opening of a sectional turning hanging bracket is required to be arranged on the inner side, and the lower opening is arranged on the outer side; reasonable lifting lugs are selected according to the weight of the segments, so that the lifting and turning of the segments are ensured; a proper turning hanging bracket is designed, so that turning hanging of sectional cylinders with various diameters can be met;
5) The large-scale tower is built by small folding, medium folding and large folding to complete the whole assembly; the large closure of the large tower can only be carried out in the external field, and the lifting capacity and space of a workshop can not be met; the support of the fixture jig frame is needed in each manufacturing process; particularly, in the large folding stage, the requirements on the large folding jig frame are more strict, the support of the jig frame is considered to meet the requirements, and particularly, the center placement accuracy of the tapered section diameter variation is controlled; the whole tonnage exceeds the gantry lifting capacity, a module trolley is adopted for carrying out lightering, and the folding jig frame needs to consider the lightering space of the module trolley and the bearing capacity of a supporting part; the saddle structure design of the large folding jig is also very important, and the reasonable structure not only meets the requirement of large folding connection, but also can bear the lightering requirement of the module trolley; thereby more reasonably using resources and greatly reducing the cost in a factory;
6) The integral hydraulic test of the large-scale tower is an important subject; the weight of a large-sized tower body is generally more than 1000T, and the total weight of the large-sized tower body is more than 3000T after the large-sized tower body is filled with water; the bearing capacity of the common ground can not meet the requirement of the overall water pressure of the large-scale tower; therefore, a dedicated hydrostatic test platform is particularly important.
The invention relates to a large-scale tower and a construction method thereof, which are suitable for a cylindrical barrel or a conical barrel with the length of more than 80m and the structural weight of more than 1000T, wherein cylindrical sections are rolled by steel plates; the large-scale tower is reasonably divided according to the whole structure of the large-scale tower and the production conditions in a factory, and the method of sectional construction is adopted, so that the standard use of a site can be met, and all sections can be simultaneously constructed, thereby saving a certain manufacturing period;
when the assembly folding jig frame is designed, the two points of elements and site resources are combined for comprehensive consideration, and in addition, the requirement of in-site transfer after equipment folding is finished is also considered; the whole jig frame arrangement process comprises the following steps: (1) leveling measurement and setting the horizontal height of the lower opening of the template; (2) arranging a jig frame template supporting seat pier and a hydraulic saddle supporting tool; (3) arranging a jig frame template and a hydraulic saddle, wherein the length and the weight of equipment exceed the hoisting capacity of a crane, so that the saddle is required to be arranged on a large folding jig frame in advance, and after the jig frame is arranged, a total station is used for measuring an upper arc of the jig frame template and the upper surface of the hydraulic saddle, and the data control is the center of precision control of the whole folding jig frame; in order to ensure the safety and precision requirements of hoisting and folding, two processes of hanging strip pocket hanging and lifting lug turning hanging are divided according to different shapes, weights and placing states of each section.
While embodiments of the present invention have been shown and described in detail with reference to the foregoing detailed description, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A large-scale tower, characterized in that: each cylinder section is formed by rolling a steel plate; the device comprises a section A, a section B, a section C, a section D and a section E, wherein one end socket is respectively arranged in the section A and the section D, the section B consists of sections B1 and B2, the section C consists of sections C1 and C2, and the section D consists of sections D1 and D2.
2. A large scale tower according to claim 1, wherein: the section A is formed by connecting two cylinder sections with different diameters through cone reducing, and the upper end of the section A is sealed by an end socket.
3. A large scale tower according to claim 1, wherein: the section B is formed by connecting two cylinder sections with different diameters through cone reducing.
4. A large scale tower according to claim 1, wherein: the section C is formed by connecting a plurality of cylinder sections with the same diameter.
5. A large scale tower according to claim 1, wherein: the section D is formed by connecting a plurality of cylinder sections with the same diameter, and the lower end of the section D is sealed by an end socket.
6. A large scale tower according to claim 1, wherein: the E section is formed by connecting a plurality of cylinder sections with the same diameter with a basic ring.
7. A method of constructing a large scale tower according to any of claims 1-6, wherein: the construction method comprises the following steps:
procedure one, build A, B1, B2, C1, C2, D1, D2 and E segments, and includes the steps of:
firstly, stacking sectional cylindrical sections one by one in a workshop, wherein cylindrical sections with large diameters are arranged below, cylindrical sections with small diameters are arranged above, backing welding is adopted between cylindrical sections except for the section A, and then the cylindrical sections are turned over to a roller frame for welding by submerged arc welding; the rest B1, B2, C1, C2, D1, D2 and E segments are all constructed by manual welding;
step two, carrying out nondestructive testing on all the segmented longitudinal girth welds, and transporting the longitudinal girth welds to an external field after the longitudinal girth welds are qualified;
in the second flow, heat treatment is carried out on each segment, and B1 and B2, C1 and C2 and D1 and D2 are folded in the middle after the heat treatment:
step one, carrying out heat treatment arrangement on each section according to the size of a heat treatment furnace, wherein the section A adopts horizontal arrangement;
step two, folding the sections B1, B2, C1, C2, D1 and D2 into sections B, C and D respectively;
process three, installing tower internals according to section A, B, C, D, and comprising the steps of:
step one, vertically arranging a subsection A, B, C, D on an external field, and horizontally aligning the opening of the subsection tower to ensure the verticality of the subsection tower body;
step two, because the diameter of the large-scale tower is large, the tower internals are heavier, and the automobile crane is adopted for installation, and the tower internals are installed layer by layer from the bottom of the section;
and a fourth process, namely hanging the segment A, B, C, D, E to a folding jig frame to carry out large folding, wherein the method comprises the following steps of:
the method comprises the steps that firstly, turning-over hanging yards are respectively arranged on a subsection A, B, C, D, E, wherein the turning-over hanging yards are required to be provided with anti-tilting toggle plates, and cylinder anti-deformation supports are required to be arranged at the turning-over hanging yards;
step two, arranging the large folding jig frame in advance to ensure the alignment of the horizontal centers of the large folding jig frame;
step three, sequentially hanging A, B, C, D, E sections of the tower to a large folding jig frame through a 1000T gantry crane, and carrying out treatment welding on a large folding opening;
and a fifth process, namely conveying the whole tower to a hydraulic test platform for hydraulic test, wherein the hydraulic test comprises the following steps:
step one, adopting a module trolley to lighte the whole tower to a water pressure platform;
step two, carrying out integral inspection on the large-scale tower before hydraulic pressure, and installing a hydraulic blind plate to carry out hydraulic pressure test according to a hydraulic pressure test process after the inspection is finished;
a sixth process of packaging and shipping, comprising the following steps:
step one, performing rust removal and paint coating on a large-sized tower after water pressure;
installing a delivery blind plate at the pipe orifice, and filling nitrogen into the nitrogen sealed cabin;
and thirdly, adopting a module trolley to transfer the large tower to a transport ship for delivery.
8. A method of constructing a large scale tower according to claim 7, wherein: in the fourth step of the process, two cylinder inner walls on one side of the section are required to be arranged by the adopted turning-over hanging bracket, the other side of the section is the outside of the cylinder, and the upper opening is arranged on the inner wall and the lower opening is arranged on the outside during turning over; the turning lifting lug comprises a lifting lug plate, a reinforcing plate, a toggle plate and a backing plate; the lifting lug plate is a main body of the lifting weight and is provided with a lifting hole, the reinforcing plate is two annular plates of the lifting hole, and the two annular plates are arranged on two sides of the lifting lug plate; the anti-tilting toggle plate is of a T-shaped structure and is arranged at two sides of the lifting lug; the base plate is connected with the hung object, the lifting lug plate and the toggle plate.
9. A method of constructing a large scale tower according to claim 7 or 8, wherein: and in the step one of the fourth process, the turning-over hanging code is set according to the step one, and the sectional azimuth after turning over is considered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211686428.7A CN116025213A (en) | 2022-12-27 | 2022-12-27 | Large-scale tower and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211686428.7A CN116025213A (en) | 2022-12-27 | 2022-12-27 | Large-scale tower and construction method |
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| CN116025213A true CN116025213A (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211686428.7A Pending CN116025213A (en) | 2022-12-27 | 2022-12-27 | Large-scale tower and construction method |
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| CN (1) | CN116025213A (en) |
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- 2022-12-27 CN CN202211686428.7A patent/CN116025213A/en active Pending
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