CN110905271B - Assembled measuring tower and installation method thereof - Google Patents
Assembled measuring tower and installation method thereof Download PDFInfo
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- CN110905271B CN110905271B CN201911207389.6A CN201911207389A CN110905271B CN 110905271 B CN110905271 B CN 110905271B CN 201911207389 A CN201911207389 A CN 201911207389A CN 110905271 B CN110905271 B CN 110905271B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/342—Arrangements for stacking tower sections on top of each other
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/12—Structures made of specified materials of concrete or other stone-like material, with or without internal or external reinforcements, e.g. with metal coverings, with permanent form elements
Abstract
An assembled measuring tower and an installation method thereof relate to the field of engineering measurement and comprise a plurality of segments which are stacked up and down, wherein each segment is of a reinforced concrete structure, and the segment positioned at the bottom is detachably fixed on the ground; any upper segment is aligned and fixed on the lower segment; each segment is in a horizontal rectangular cylinder shape and comprises a bottom plate, a top plate and two side plates; one side plate of each segment is provided with a vertical ladder stand, the ladder stands are as high as the side plates, and the ladder stands of a plurality of segments are connected into a whole; the upper surface of the top plate of the segment positioned at the top is vertically provided with a steel upright post, the top of the steel upright post is provided with a centering disc, and the centering disc is in a horizontal state. The invention aims to provide an assembly type measuring tower and an installation method thereof, which can realize height adjustment and partial replacement and can be repeatedly disassembled, assembled and utilized.
Description
Technical Field
The invention relates to the field of engineering measurement, in particular to an assembled measuring tower and an installation method thereof.
Background
In the process of manufacturing and acceptance of structural members of a ship processing manufacturing factory and a bridge upper structure prefabricating factory, measurement paying-off needs to be carried out firstly, then, the line shape is measured and checked, and the acceptance accuracy of the both needs to reach three millimeters or even higher. In the prior art, a steel structure measuring tower is generally used as a positioning reference when linear measurement is carried out. However, the existing steel structure measuring tower has the following disadvantages:
1. the height of the steel structure measuring tower is limited and cannot be increased or reduced.
2. The steel structure measuring tower is easy to generate permanent deformation, so that the reference point has errors, the measuring and positioning reference basis can not be accurately provided, and the steel structure measuring tower is often required to be integrally replaced during replacement.
3. After the steel structure measuring tower is vibrated by surrounding construction, the amplitude is large, so that the measuring instrument cannot accurately measure the result, and the measuring precision is low.
4. Due to the performance of steel, the steel structure measuring tower is easily influenced by environmental factors such as temperature, wind power and the like, so that the measuring tower generates a temperature shrinkage effect, and a measuring reference can not be accurately provided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an assembly type measuring tower and an installation method thereof, which can realize height adjustment and partial replacement and can be repeatedly disassembled, assembled and utilized.
In order to achieve the above purposes, the technical scheme is as follows: the fabricated measuring tower is characterized by comprising a plurality of segments which are stacked up and down, wherein the segments are of reinforced concrete structures, and the segments positioned at the bottom are detachably fixed on the ground; any upper segment is aligned and fixed on the lower segment;
each segment is in a horizontal rectangular cylinder shape and comprises a bottom plate, a top plate and two side plates; one side plate of each segment is provided with a vertical ladder stand, the ladder stands are as high as the side plates, and the ladder stands of a plurality of segments are connected into a whole;
the upper surface of the top plate of the segment positioned at the top is vertically provided with a steel upright post, the top of the steel upright post is provided with a centering disc, and the centering disc is in a horizontal state.
On the basis of the technical scheme, the sections comprise reinforcement cages which are bound into a rectangular cylinder shape, and a concrete body is formed by erecting a mold and pouring concrete; and long-strip-shaped embedded steel plates are arranged at the top and bottom edges of the two side surfaces of the concrete body.
On the basis of the technical scheme, the height of the embedded steel plate is equal to the wall thickness of the segment, and the length of the embedded steel plate is equal to that of the side plate; and two ends of the ladder stand are respectively and fixedly arranged on the embedded steel plate at the top and the embedded steel plate at the bottom of each section.
On the basis of the technical scheme, the measuring tower further comprises a fixing assembly, the fixing assembly comprises an L-shaped connecting plate and foundation bolts, one side plate of the L-shaped connecting plate is welded on an embedded steel plate at the bottom of the section serving as the base, and the other side plate of the L-shaped connecting plate is fixed on the ground through the foundation bolts.
On the basis of the technical scheme, the measuring tower further comprises an alignment steel plate, one end of the alignment steel plate is welded on the embedded steel plate at the top of the next segment, and the other end of the alignment steel plate is connected to the embedded steel plate at the bottom of the previous segment through screws.
On the basis of the technical scheme, the cat ladder contains two montants and many horizontal poles, and the cat ladder of second floor section and above all matches the installation protection casing, the protection casing contains many semicircular steel bars that are the horizontally, and the both ends of every semicircular steel bar weld respectively in on two montants of cat ladder.
On the basis of the technical scheme, a steel plate is embedded in the upper surface of the top plate of the segment positioned at the top, a vertical guard rail is arranged on the steel plate, and the guard rail is arranged on the periphery of the upper surface of the top plate.
On the basis of the technical scheme, the ladder stand and the protective cover of the segment positioned at the top extend to the highest position of the protective guard.
The invention also discloses an installation method based on the assembly type measuring tower, which comprises the following steps:
s1: erecting a mould to finish pouring and forming of a plurality of sections;
s2: installing a vertical ladder stand at the same position of the outer surface of one side plate of each section;
s3: vertically installing a steel upright on the upper surface of the segment top plate at the top;
s4: detachably fixing the segment serving as the base to the ground;
s5: stacking, aligning and fixedly mounting the middle segment and the top segment sequentially by a crane;
s6: and horizontally installing the centering disc on the top of the steel upright post.
On the basis of the above technical solution, in step S1, the step of casting the segments is: binding a reinforcement cage into a rectangular cylinder shape; mounting embedded steel plates on the top and bottom edges of two side surfaces of the reinforcement cage; erecting a mould, pouring concrete, and curing and forming;
in step S2, welding protective covers to the ladder stands of the other sections except for the section serving as the base, wherein each protective cover comprises a plurality of horizontal semicircular steel bars, and two ends of each semicircular steel bar are respectively welded to two vertical bars of the ladder stand;
in step S4, fixing components are used as segments of the base to be fixed to the ground, each fixing component includes an L-shaped connecting plate and an anchor bolt, one side plate of each L-shaped connecting plate is welded to the embedded steel plate at the bottom, and the other side plate of each L-shaped connecting plate is fixed to the ground through the anchor bolt;
in step S5, the upper and lower segments are fixed by using an alignment steel plate, one end of the alignment steel plate is welded to the pre-embedded steel plate at the top of the lower segment, and the other end of the alignment steel plate is connected to the pre-embedded steel plate at the bottom of the upper segment by screws.
The invention has the beneficial effects that:
1. the measuring tower mainly comprises a plurality of sections which are stacked up and down, and each section can be subjected to standardized prefabrication, so that the production and processing difficulty is reduced, and the working efficiency is greatly improved; meanwhile, the number of the overlapped segments can be changed according to the actual height requirement, and the height of the measuring tower can be flexibly adjusted, so that the measuring tower is higher in practicability and wider in applicability.
2. When the measuring tower is locally deformed or damaged, only the segment needs to be replaced without integral replacement, and the service life of the measuring tower is prolonged by phase change;
the main body structure of the measuring tower is a reinforced concrete structure, and compared with a steel structure measuring tower, the measuring tower is less affected by vibration, thermal expansion and cold contraction, and the provided measuring reference is more accurate.
3. The measuring tower is convenient to disassemble and assemble, can be used as a bridge observation tower only by being towed to the site for installation when in use, can also be used as a measuring reference observation platform in shipyards and beam yards, and has wide application range and less limitation; the assembly can be realized only by welding and bolting, the adjustment is convenient, the stability is strong, and the assembly, the disassembly and the use can be repeated.
Drawings
FIG. 1 is a front view of a measuring tower according to an embodiment of the present invention.
FIG. 2 is a perspective view of a measuring tower according to an embodiment of the present invention.
FIG. 3 is a partial cross-sectional view of an embodiment of the present invention as a base segment.
Reference numerals: 1-fixing component, 2-aligning steel plate, 5-steel upright post, 6-protective fence, 7-centering disc, 9-protective cover, 10-ladder stand, 11-steel reinforcement cage, 12-concrete body, 13-embedded steel plate, 14-antirust paint, 20-segment, 41-L-shaped connecting plate and 42-foundation bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, a fabricated measuring tower comprises a plurality of segments 20 stacked one on top of the other, wherein the segments 20 are of reinforced concrete structure, and the segments 20 at the bottom are detachably fixed on the ground; any upper level segment 20 is secured in alignment with the lower level segment 20.
Each segment 20 is in the form of a lying rectangular cylinder comprising a bottom plate, a top plate and two side plates. Specifically, the segment 20 is a rectangular parallelepiped, and is formed by forming a through rectangular groove on a side surface. Preferably, the bottom plate, the top plate and the two side plates are of the same thickness. The rectangular cylindrical section 20 is hollow in the middle and lighter in weight, so that the subsequent stacking operation of the upper and lower sections 20 is facilitated.
One of the side plates of each segment 20 is provided with a vertical ladder stand 10, the ladder stand 10 is at the same height as the side plates, and the ladder stands of a plurality of segments 20 are connected into a whole, so that a worker can conveniently climb from the ground to the top segment 20.
The steel upright post 5 is vertically arranged on the upper surface of the top plate of the segment 20 positioned at the top, the centering disk 7 is arranged at the top of the steel upright post 5, and the centering disk 7 is in a horizontal state. Preferably, a steel upright 5 is installed at the center of the upper surface of the top plate.
As shown in fig. 3, the segment 20 includes reinforcement cages 11, the reinforcement cages 11 are bound into a rectangular cylinder, and a concrete body 12 is formed by erecting a mold and pouring concrete; the top and bottom edges of two sides of the concrete body 12 are provided with strip-shaped embedded steel plates 13.
Preferably, the height of the pre-buried steel plate 13 (the size of the pre-buried steel plate includes length, height and thickness) is equal to the wall thickness of the segment 20, i.e. the thickness of the bottom plate, the top plate and the two side plates, and the length of the pre-buried steel plate 13 is equal to the length of the side plates (the size of the side plates includes length, height and thickness). The two ends of the ladder stand 10 are respectively fixedly arranged on the embedded steel plate 13 at the top and the embedded steel plate 13 at the bottom of each section 20.
As shown in fig. 3, the measuring tower further includes a fixing assembly 1, the fixing assembly 1 includes an L-shaped connecting plate 41 and anchor bolts 42, one side plate of the L-shaped connecting plate 41 is welded to the embedded steel plate 13 at the bottom of the section 20 (i.e., the bottommost one of the sections 20) serving as the base, and the other side plate of the L-shaped connecting plate 41 is fixed to the ground through the anchor bolts 42. After the measuring tower is used, the foundation bolts 42 only need to be removed, and the segment 20 serving as the base can be moved, so that the measuring tower can be reused.
The measuring tower also comprises an alignment steel plate 2, and the alignment steel plate 2 is used for aligning the upper and lower segments 20 and fixing the upper and lower segments 20. One end of the contraposition steel plate 2 is welded on the embedded steel plate 13 at the top of the next segment 20, and the other end is connected on the embedded steel plate 13 at the bottom of the previous segment 20 through screws. In the actual use process, in order to enhance the connection strength, both ends of the alignment steel plate 2 may be connected by welding.
As shown in fig. 1, the ladder 10 comprises two vertical bars and a plurality of cross bars, which are used by workers both by their hands and feet to climb from the ground to the top surface of the top section 20. In order to meet the requirement of safety protection, the protective cover 9 is arranged on the ladder stand 10 of the second layer and the upper section 20 in a matched mode, the protective cover 9 comprises a plurality of horizontal semicircular steel bars, and two ends of each semicircular steel bar are welded to two vertical bars of the ladder stand 10 respectively. Preferably, vertical reinforcing steel bars are further arranged between the plurality of semicircular steel bars. The protective cover 9 improves the construction safety.
The steel plate is buried in the upper surface of the top plate of the segment 20 positioned at the top, the vertical guard rails 6 are arranged on the steel plate, and the guard rails 6 are arranged on the periphery of the upper surface of the top plate, so that the construction safety is further improved.
In this embodiment, the embedded steel plate is in a shape of a Chinese character 'hui', and is just used for fixedly installing the guard rail 6; at the moment, the bottom of the steel upright post 5 is also a small steel plate which is specially used for installing and fixing the steel upright post 5; the steel plate consumption is reduced, and the construction cost is further reduced.
In other embodiments, the embedded steel plate may be a single piece of steel plate having a size equal to the upper surface of the top plate.
Further, the ladder stand 10 and the guard 9 of the segment 20 located at the top extend to the highest position of the guard rail 6, facilitating the worker to climb directly into the guard rail 6 from the ground.
Preferably, the bottom segment 20 needs to be leveled off before installation, improving the flatness, making it easier to level the subsequent centering disk 7 when it is installed.
Preferably, the rust inhibitive paint 14 is sprayed on the outer surface of the segment 20 to prevent rust corrosion of steel members and improve the service life of the measuring tower.
The invention also discloses an installation method based on the assembly type measuring tower, which comprises the following steps:
s1: erecting a mould to complete the pouring and forming of the plurality of sections 20;
s2: mounting a vertical ladder stand 10 at the same position of the outer surface of one of the side plates of each segment 20;
s3: vertically installing a steel upright 5 on the upper surface of the top plate of the top section 20;
s4: detachably fixing the segment 20 as a base to the ground;
s5: the middle section and the top section 20 are sequentially overlapped, aligned and fixedly installed through a crane;
s6: the centering disk 7 is horizontally installed on the top of the steel upright post 5.
Specifically, in step S1, the step of casting the segment 20 is as follows:
s101: binding the reinforcement cage 11 into a rectangular cylinder shape;
s102: mounting embedded steel plates 13 on the top and bottom edges of two side surfaces of the reinforcement cage 11;
s103: and (5) erecting a mould, pouring concrete, and curing and forming.
Meanwhile, in step S1, one segment 20 is selected as the segment 20 of the top of the measuring tower, and a steel plate is buried in the upper surface of the top plate of the segment 20.
In step S2, the protective cover 9 is welded to the ladder stands 10 of the other segments 20 except the segment 20 serving as the base, the protective cover 9 includes a plurality of horizontal semicircular reinforcing bars, and both ends of each semicircular reinforcing bar are welded to two vertical bars of the ladder stand 10, respectively.
In step S3, the bottom of the steel pillar 5 is fixedly attached to the steel plate pre-buried in step S1.
In step S4, the segment 20 serving as the base is fixed to the ground by using the fixing assembly 1, the fixing assembly 1 includes an L-shaped connecting plate 41 and an anchor bolt 42, one side plate of the L-shaped connecting plate 41 is welded to the embedded steel plate 13 at the bottom, and the other side plate of the L-shaped connecting plate 41 is fixed to the ground by the anchor bolt 42.
In step S5, the upper and lower segments 20 are fixed by using the alignment steel plates 2, one end of each alignment steel plate 2 is welded to the embedded steel plate 13 at the top of the lower segment 20, and the other end of each alignment steel plate 2 is connected to the embedded steel plate 13 at the bottom of the upper segment 20 by screws.
After the stacking alignment installation of the step S5, the ladder stands 10 of a plurality of segments are connected in a straight line to be integrated.
The measuring tower mainly comprises a plurality of sections which are stacked up and down, and each section can be subjected to standardized prefabrication, so that the production and processing difficulty is reduced, and the working efficiency is greatly improved; meanwhile, the number of the overlapped segments can be changed according to the actual height requirement, and the height of the measuring tower can be flexibly adjusted, so that the measuring tower is higher in practicability. In addition, the main body structure of the measuring tower is a reinforced concrete structure, and compared with a steel structure measuring tower, the measuring tower disclosed by the invention is less influenced by vibration, thermal expansion and cold contraction, and the provided measuring reference is more accurate.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (4)
1. A method for installing a fabricated measuring tower, characterized in that the fabricated measuring tower comprises a plurality of segments (20) which are stacked up and down, the segments (20) are of reinforced concrete structure, and the segments (20) at the bottom are detachably fixed on the ground; any upper layer segment (20) is aligned and fixed on the lower layer segment (20);
each segment (20) is in a horizontal rectangular cylinder shape and comprises a bottom plate, a top plate and two side plates; one side plate of each segment (20) is provided with a vertical ladder (10), the ladder (10) is as high as the side plate, and the ladders of a plurality of segments (20) are connected into a whole;
a steel upright post (5) is vertically arranged on the upper surface of a top plate of the top section (20), a centering disc (7) is arranged on the top of the steel upright post (5), and the centering disc (7) is in a horizontal state;
the segments (20) comprise reinforcement cages (11), the reinforcement cages (11) are bound into a rectangular cylinder shape, and a concrete body (12) is formed by erecting a mold and pouring concrete; the top and bottom edges of the two side surfaces of the concrete body (12) are provided with long-strip-shaped embedded steel plates (13);
the measuring tower further comprises a fixing assembly (1), the fixing assembly (1) comprises an L-shaped connecting plate (41) and foundation bolts (42), one side plate of the L-shaped connecting plate (41) is welded to an embedded steel plate (13) at the bottom of the section (20) serving as a base, and the other side plate of the L-shaped connecting plate (41) is fixed to the ground through the foundation bolts (42);
the height of the embedded steel plate (13) is equal to the wall thickness of the segment (20), and the length of the embedded steel plate (13) is equal to that of the side plate; two ends of the ladder stand (10) are respectively fixedly arranged on an embedded steel plate (13) at the top of each segment (20) and an embedded steel plate (13) at the bottom of each segment;
the measuring tower further comprises an alignment steel plate (2), one end of the alignment steel plate (2) is welded on the embedded steel plate (13) at the top of the next segment (20), and the other end of the alignment steel plate is connected to the embedded steel plate (13) at the bottom of the previous segment (20) through a screw;
the installation method comprises the following steps:
s1: erecting a mould, and finishing pouring and forming of a plurality of sections (20);
s2: mounting a vertical ladder (10) at the same position of the outer surface of one of the side plates of each segment (20);
s3: vertically installing a steel upright post (5) on the upper surface of the top plate of the top section (20);
s4: detachably fixing a segment (20) as a base to the ground;
s5: the middle section and the top section (20) are sequentially overlapped, aligned and fixedly installed through a crane;
s6: horizontally installing a centering disc (7) on the top of the steel upright post (5);
in step S1, the step of casting the segment (20) is: binding the reinforcement cage (11) into a rectangular cylinder shape; installing embedded steel plates (13) on the top and bottom edges of two side faces of the reinforcement cage (11); erecting a mould, pouring concrete, and curing and forming;
in step S2, welding protective covers (9) to the ladder stands (10) of the other segments (20) except the segment (20) serving as the base, wherein each protective cover (9) comprises a plurality of horizontal semicircular steel bars, and two ends of each semicircular steel bar are respectively welded to two vertical bars of the ladder stand (10);
in step S4, a segment (20) serving as a base is fixed to the ground by using a fixing assembly (1), the fixing assembly (1) includes an L-shaped connecting plate (41) and an anchor bolt (42), one side plate of the L-shaped connecting plate (41) is welded to an embedded steel plate (13) at the bottom, and the other side plate of the L-shaped connecting plate (41) is fixed to the ground by the anchor bolt (42);
in step S5, the upper and lower segments (20) are fixed by using the alignment steel plates (2), one end of each alignment steel plate (2) is welded to the pre-embedded steel plate (13) at the top of the lower segment (20), and the other end of each alignment steel plate is connected to the pre-embedded steel plate (13) at the bottom of the upper segment (20) by screws.
2. The method of installation of claim 1, wherein: cat ladder (10) contain two montants and many horizontal poles, cat ladder (10) of second floor and above segment (20) all form a complete set installation protection casing (9), protection casing (9) contain many semicircular steel bars that are the horizontally, and the both ends of every semicircular steel bar weld respectively on two montants of cat ladder (10).
3. The method of installation according to claim 2, wherein: a steel plate is embedded in the upper surface of a top plate of the segment (20) positioned at the top, a vertical guard rail (6) is mounted on the steel plate, and the guard rail (6) is arranged on the periphery of the upper surface of the top plate.
4. The mounting method according to claim 3, wherein: the ladder (10) and the protective guard (9) of the segment (20) at the top extend to the highest position of the protective guard (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911207389.6A CN110905271B (en) | 2019-11-29 | 2019-11-29 | Assembled measuring tower and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911207389.6A CN110905271B (en) | 2019-11-29 | 2019-11-29 | Assembled measuring tower and installation method thereof |
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| CN110905271A CN110905271A (en) | 2020-03-24 |
| CN110905271B true CN110905271B (en) | 2021-08-10 |
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| US3500595A (en) * | 1967-10-27 | 1970-03-17 | Flehr Hohbach | Modular building construction unit and column |
| DE2915498A1 (en) * | 1979-04-17 | 1980-10-30 | Gervin Josef Mueller | Electricity substation with superimposed concrete sections - has lowest cell embedded in concrete mounting and supporting remainder and containing steel reinforcing rods |
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| CN101163843A (en) * | 2005-04-21 | 2008-04-16 | 结构混凝土&钢公司 | Prefabricated modular tower |
| WO2009098524A1 (en) * | 2008-02-04 | 2009-08-13 | Enallaktiki Energiaki S.A. | Aluminum triangular lattice section for the construction of lattice towers of various heights with guy wires |
| CN206530132U (en) * | 2017-01-17 | 2017-09-29 | 中交一公局第二工程有限公司 | The segment girder precast measurement formula of consolidating superelevation observation tower |
| CN209011661U (en) * | 2018-08-14 | 2019-06-21 | 四川航瑞信通科技股份有限公司 | A kind of quickly assembling communication base station signal tower |
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2019
- 2019-11-29 CN CN201911207389.6A patent/CN110905271B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3500595A (en) * | 1967-10-27 | 1970-03-17 | Flehr Hohbach | Modular building construction unit and column |
| DE2915498A1 (en) * | 1979-04-17 | 1980-10-30 | Gervin Josef Mueller | Electricity substation with superimposed concrete sections - has lowest cell embedded in concrete mounting and supporting remainder and containing steel reinforcing rods |
| CN2654780Y (en) * | 2003-11-27 | 2004-11-10 | 冀永学 | Anticorrusion frozen cracking proof reinforced concrete electrical pole |
| CN101163843A (en) * | 2005-04-21 | 2008-04-16 | 结构混凝土&钢公司 | Prefabricated modular tower |
| WO2009098524A1 (en) * | 2008-02-04 | 2009-08-13 | Enallaktiki Energiaki S.A. | Aluminum triangular lattice section for the construction of lattice towers of various heights with guy wires |
| CN206530132U (en) * | 2017-01-17 | 2017-09-29 | 中交一公局第二工程有限公司 | The segment girder precast measurement formula of consolidating superelevation observation tower |
| CN209011661U (en) * | 2018-08-14 | 2019-06-21 | 四川航瑞信通科技股份有限公司 | A kind of quickly assembling communication base station signal tower |
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