Adjustable portal girder tension platform

Abstract

The utility model relates to the technical field of bent cap tensioning construction, disclose a kind of adjustable portal bent cap tensioning platform, comprising: the tensioning platform of bent cap one side;Multiple groups of support mechanisms are arranged at intervals along the length direction of tensioning platform, and support mechanism includes upper connecting seat, lower connecting seat, horizontal bar and inclined strut, and upper connecting seat and lower connecting seat are detachably connected with stand by first fastener, one end of horizontal bar is fixedly connected with upper connecting seat, the other end of horizontal bar is abutted below tensioning platform, and inclined strut is obliquely arranged, and one end thereof is hinged with lower connecting seat, and the other end is below tensioning platform, and is hinged with horizontal bar;And the clamping assembly detachably connected in the other end of horizontal bar, and clamping assembly is detachably connected with tensioning platform.The utility model does not need to be in high altitude to handle the accurate alignment of multiple parts, while avoiding the connection deviation, falling risk rate that multiple parts high-altitude cooperation is prone to.

Description

Technical Field

[0001] This utility model relates to the field of cap beam tensioning construction technology, and in particular to an adjustable portal cap beam tensioning platform. Background Technology

[0002] With the rapid advancement of transportation infrastructure construction, portal girder bridges, as key load-bearing components in bridge structures, are widely used in various engineering scenarios such as urban overpasses and highway bridges. The tensioning of portal girder bridges is a core process ensuring the structural strength, stability, and durability of the structure, directly impacting the overall construction quality and operational safety of the bridge. As bridge construction develops towards larger spans and more diverse specifications, portal girder bridges of various models and sizes are emerging, placing higher demands on the adaptability and efficiency of tensioning operations.

[0003] Patent document CN223497032U, entitled "An Adjustable Portal Beam Tensioning Platform," proposes an adjustable portal beam tensioning platform, mainly comprising a cantilever structure, a fixed structure, and a working platform. The cantilever structure consists of multiple first cantilever beams spaced at intervals along a specific direction on the bottom side of the cap beam. The fixed structure comprises multiple fixed frames fitted onto the outside of the cap beam and the cantilever structure. Adjustable connecting rods cooperate with the fixed beams to adapt to different cap beam models. However, this tensioning platform solution has significant shortcomings: its overall structure needs to be directly installed on the cap beam, involving a large number of parts, including first cantilever beams, second cantilever beams, fixed beams, connecting rods, precision-rolled threaded steel bars, gaskets, locking components, and other components. Furthermore, each component needs to be assembled, adjusted, and fixed at a high altitude. The complex environment of working at heights not only increases the labor intensity of construction workers but also makes the installation and dismantling process cumbersome, extending the construction period. At the same time, the installation of multiple parts at heights can easily lead to problems such as loose connections and positional adjustment deviations, which not only affect the stability and safety of the platform but may also reduce the accuracy of tensioning operations due to assembly errors. In addition, the transportation, handling, and high-altitude operations of a large number of parts further increase construction costs and safety risks, making it difficult to meet the requirements of efficient and safe construction.

[0004] In view of this, how to change the current situation of the complex structure of the parts of the existing adjustable portal girder tensioning platform and the inconvenience of high-altitude operation, reduce the high-altitude assembly process, and reduce the construction difficulty and safety risks has become a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention aims to provide an adjustable portal girder tensioning platform to overcome the shortcomings mentioned above.

[0006] In order to achieve the above objectives, the technical solution of this utility model is as follows: An adjustable portal girder tensioning platform, comprising: Tensioning platform located on one side of the cap beam; Multiple sets of support mechanisms are spaced apart along the length of the tensioning platform. Each support mechanism includes an upper connecting seat, a lower connecting seat, a transverse member, and a diagonal brace. The upper and lower connecting seats are detachably connected to the column via a first fastener. One end of the transverse member is fixedly connected to the upper connecting seat, and the other end abuts against the lower part of the tensioning platform. The diagonal brace is inclined, with one end hinged to the lower connecting seat and the other end located below the tensioning platform and hinged to the transverse member. A snap-fit ​​assembly is detachably connected to the other end of the transverse bar, and the snap-fit ​​assembly is detachably connected to the tensioning platform.

[0007] Furthermore, the transverse member includes: The support rod, one end of which is fixedly connected to the upper connecting seat; and A first extension rod and a connector, one end of the first extension rod being detachably connected to the other end of the support rod via the connector, the first extension rod abutting below the tensioning platform, and a snap-fit ​​assembly being detachably connected to the first extension rod.

[0008] Furthermore, the diagonal brace includes: A diagonal brace, one end of which is hinged to the lower connecting seat; The second extension rod has one end detachably connected to the other end of the diagonal brace via the connector, and the other end of the second extension rod is connected to the first extension rod.

[0009] Furthermore, the diagonal brace also includes: A rectangular frame is fixedly installed at the other end of the second extension rod. One end of a screw is inserted through the rectangular frame. Adjusting nuts are threaded to both sides of the screw through the rectangular frame. The other end of the screw is hinged to the lower end of the first extension rod.

[0010] Furthermore, the support rod, the first extension rod, the diagonal brace, and the second extension rod are all made of I-beams; The connector includes: Two connecting square tubes are located between the two flanges of the I-beam and on both sides of its web. The two ends of each connecting square tube pass through two adjacent connected I-beams. A connecting sleeve, disposed opposite to the connecting square tube and fitted around the periphery of the connection between the two I-beams, and The second fastener is provided at both ends of the connecting square tube, and the second fastener passes through the connecting sleeve, the I-beam and the connecting steel pipe.

[0011] Furthermore, the tensioning platform includes: A support frame, wherein a plurality of the aforementioned snap-fit ​​components are arranged in a rectangular array around the periphery of the support frame; and A support plate that is fixedly connected within the support frame.

[0012] Furthermore, the snap-fit ​​assembly includes: A bending plate, one end of which is snapped into one end of the upper flange plate of the first extension rod, and the other end of which extends toward the other end of the flange plate of the first extension rod; A clamping plate is connected to the other end of the bending plate via a third fastener, and the other end of the bending plate cooperates with the clamping plate to engage with the other end of the first extension rod flange plate. A mounting threaded sleeve is vertically fixed to the upper surface of the bent plate; A snap-fit ​​plate detachably connected to the bottom of the support frame; and The fastening bolts extend through the snap-fit ​​plate and are threadedly connected to the mounting threaded sleeve.

[0013] Furthermore, a blind hole is provided at the bottom of the support frame; One end of the snap-fit ​​plate is provided with a hook portion that matches the blind hole, and the other end of the snap-fit ​​plate is provided with the fastening bolt.

[0014] Furthermore, the first fastener includes: Pre-embedded threaded sleeves embedded in the column; and Several mounting bolts are provided, and the upper and lower connecting seats are evenly provided with multiple mounting holes. The mounting bolts pass through the mounting holes and are threadedly connected to the threaded sleeve.

[0015] Furthermore, the second fastener includes a connecting bolt and a connecting nut, wherein the connecting bolt passes through the connecting sleeve, the I-beam and the connecting steel pipe and is threadedly connected to the connecting nut.

[0016] Compared with the prior art, this utility model has at least the following advantages: This solution significantly optimizes the operation through a structural design of "detachable connection + modular assembly". On the one hand, the upper and lower connecting seats only need to be connected to the column through the first fastener, eliminating the need for additional drilling, welding or other complex processing on the cap beam or column. Moreover, the connection operation of the first fastener is simple, and workers do not need to handle the precise alignment of multiple parts at high altitudes. On the other hand, the horizontal members, diagonal braces and tensioning platform are detachably connected through snap-fit ​​components, allowing for the pre-assembly of some structures on the ground. This reduces the number of parts and assembly steps required for high-altitude operations, lowers the labor intensity caused by numerous parts and complex operations at high altitudes, and avoids the connection deviation and falling risk that can easily occur when multiple parts are coordinated at high altitudes, significantly improving construction safety and efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the adjustable portal girder tensioning platform of this utility model; Figure 2 This utility model Figure 1 A magnified view of a portion of region A in the middle; Figure 3 This is an exploded view of the connector and two I-beams of this utility model; Figure 4 This is a schematic diagram of the assembly of the snap-fit ​​component and the first extension rod of this utility model; Figure 5 This utility model Figure 1 A magnified view of a portion of region B in the middle.

[0019] Reference numerals: 1. Tensioning platform; 2. Upper connecting seat; 3. Lower connecting seat; 4. Horizontal member; 5. Diagonal brace; 6. First fastener; 7. Snap-fit ​​assembly; 11. Support frame; 12. Support plate; 41. Support rod; 42. First extension rod; 43. Connecting square tube; 44. Connecting sleeve; 45. Connecting bolt; 46. Connecting nut; 51. Diagonal brace; 52. Second extension rod; 53. Rectangular frame; 54. Screw; 55. Adjusting nut; 61. Threaded sleeve; 62. Installing bolt; 71. Bending plate; 72. Third fastener; 73. Clamping plate; 74. Embedded threaded sleeve; 75. Snap-fit ​​plate; 76. Fastening bolt. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figure 1 This utility model provides an adjustable portal girder tensioning platform 1, which aims to solve the problems of complex component structure and inconvenience of high-altitude operation of existing similar platforms. By simplifying the structural design and optimizing the connection method, it reduces high-altitude assembly procedures, reduces construction difficulty and safety risks, and at the same time ensures the platform's versatility, stability and tensioning operation accuracy.

[0023] The adjustable portal girder tensioning platform 1 mainly consists of three parts: the tensioning platform 1, multiple sets of support mechanisms, and the snap-fit ​​assembly 7. The tensioning platform 1 is located on one side of the girder and serves to support personnel and equipment required for tensioning operations, providing a stable working surface. Multiple sets of support mechanisms are spaced apart along the length of the tensioning platform 1 and are the core load-bearing structures connecting the tensioning platform 1 to the bridge columns. They bear all loads on the tensioning platform 1 and during the operation, and their detachable connection to the columns allows for quick installation and disassembly of the platform. The snap-fit ​​assembly 7 is detachably connected to the ends of the transverse members 4 of the support mechanisms, securely connecting the tensioning platform 1 to the support mechanisms, and also possesses a certain degree of adjustability to adapt to the installation requirements of tensioning platforms 1 of different sizes.

[0024] Each support mechanism includes an upper connecting seat 2, a lower connecting seat 3, a horizontal member 4, and a diagonal brace 5. The four components work together to form a stable triangular support structure, ensuring reliable support for the tensioning platform 1.

[0025] Combined with reference Figure 5Both the upper connecting seat 2 and the lower connecting seat 3 are detachably connected to the bridge column via a first fastener 6. The first fastener 6 includes a pre-embedded threaded sleeve 74 embedded inside the column and several mounting bolts 62. During the column pouring stage, the pre-embedded threaded sleeve 74 is pre-embedded in the designated position. After the column concrete reaches the required strength, multiple mounting holes are pre-drilled evenly on both the upper connecting seat 2 and the lower connecting seat 3. During installation, the mounting bolts 62 are simply passed through the mounting holes on the connecting seat and tightened onto the pre-embedded threaded sleeve 74 to fix the connecting seat to the column. This pre-embedded connection method eliminates the need for additional drilling into the column at height, simplifying the high-altitude operation process while ensuring connection strength and avoiding safety hazards and damage to the column structure caused by high-altitude drilling operations.

[0026] Refer again Figure 1 The transverse member 4 serves as a horizontal load-bearing component of the support mechanism. One end is fixedly connected to the upper connecting seat 2, and the other end extends below the tensioning platform 1 and abuts against the bottom of the platform, providing horizontal support for the tensioning platform 1. The transverse member 4 specifically includes a support rod 41, a first extension rod 42, and a connector. One end of the support rod 41 is fixedly connected to the upper connecting seat 2 by welding to ensure the connection is firm. One end of the first extension rod 42 is detachably connected to the other end of the support rod 41 through the connector, and the other end of the first extension rod 42 abuts against the bottom of the tensioning platform 1. At the same time, a snap-fit ​​assembly 7 is detachably connected to the first extension rod 42 for fixing it in conjunction with the tensioning platform 1.

[0027] The diagonal brace 5 is inclined to enhance the overall stability of the support mechanism and prevent the transverse member 4 from bending or tilting due to excessive load. The diagonal brace 5 includes a diagonal brace 51 and a second extension rod 52. One end of the diagonal brace 51 is hinged to the lower connecting seat 3. One end of the second extension rod 52 is detachably connected to the other end of the diagonal brace 51 through the aforementioned connector, and the other end of the second extension rod 52 is connected to the first extension rod 42 to form a complete diagonal support structure.

[0028] To further enhance the adaptability and stability of the support mechanism, the diagonal brace 5 also includes a rectangular frame 53 fixedly mounted at the other end of the second extension rod 52. The rectangular frame 53 is a metal frame structure with a screw 54 running through it. Adjusting nuts 55 are threaded onto both sides of the screw 54, which passes through the rectangular frame 53. The other end of the screw 54 is hinged to the lower end of the first extension rod 42. By rotating the adjusting nuts 55 on both sides, the extension length of the screw 54 within the rectangular frame 53 can be changed, thereby fine-tuning the angle between the diagonal brace 5 and the transverse rod 4. This allows the support mechanism to adapt to the installation requirements of tensioning platforms 1 with different heights and spans. Furthermore, after installation, the adjusting nuts 55 can be used to further tighten the brace, ensuring the stability of the supporting force of the diagonal brace 5.

[0029] Reference Figure 2-3 The connectors used in the transverse member 4 and the diagonal brace member 5 are key components for achieving detachable connections between the members, and their structural design must balance connection strength and ease of installation. The support rod 41, the first extension rod 42, the diagonal brace 51, and the second extension rod 52 are all made of I-beams. The connector includes two connecting square tubes 43, a connecting sleeve 44, and a second fastener. The connecting square tubes 43 are metal square tubes, the size of which matches the spacing between the web plates of the I-beam. During installation, they are positioned between the two flanges of the I-beam and fit against both sides of the web plate. The two ends of the connecting square tubes 43 are inserted into the interior of the adjacent I-beams to be connected, forming a preliminary positioning between the members. The connecting sleeve 44 is a metal sleeve that matches the outer contour of the I-beam. It is fitted around the periphery of the connection point between the two I-beams, providing a wrap-around protection and auxiliary positioning. The second fastener includes a connecting bolt 45 and a connecting nut 46. The connecting bolt 45 passes through the connecting sleeve 44, the flanges and web plate of the I-beam, and the connecting square tube 43 in sequence, and then the connecting nut 46 is threaded onto the other end. After tightening, a firm connection between the two I-beams is achieved. This connector structure does not require complex processing of the I-beams. A detachable connection can be completed using only standard parts, and the connection process can be partially assembled on the ground, reducing the amount of high-altitude work. In addition, the support rod 41, the first extension rod 42, the diagonal brace 51 and the second extension rod 52 are all made of I-beams. I-beams have excellent bending and shear resistance, can withstand large loads, and are widely available and cost-effective, making them suitable as the main body of the support mechanism.

[0030] The tensioning platform 1 is the direct operating platform for workers, and its structure must meet the requirements of load-bearing capacity, safety, and stability. Specifically, it includes two parts: a support frame 11 and a support plate 12. The support frame 11 is a metal frame structure formed by welding or bolting multiple metal rods, with an overall rectangular shape or a shape adapted to the size of the cap beam. Several snap-fit ​​components 7 are distributed in a rectangular array around the perimeter of the support frame 11, connecting to the transverse members 4 of the support mechanism to ensure uniform stress on the support frame 11. The support plate 12 is a plate with a certain strength, fixedly connected inside the support frame 11, covering the entire bottom surface of the support frame 11 to form a complete working plane. The support plate 12 can be made of materials such as bamboo plywood or steel plate, and the surface can be textured with anti-slip patterns to prevent workers from slipping in wet or oily environments.

[0031] Reference Figure 4The snap-fit ​​assembly 7 is the core component connecting the tensioning platform 1 and the transverse rod 4 of the support mechanism. It needs to achieve detachable connection and quick positioning between the two. Its structure includes a bending plate 71, a clamping plate 73, a threaded sleeve, a snap-fit ​​plate 75, and a fastening bolt 76. The bending plate 71 is a metal sheet bent into shape. One end is snapped into one end of the flange plate above the first extension rod 42 to form a preliminary engagement. The other end of the bending plate 71 extends towards the other end of the flange plate of the first extension rod 42 and is connected to the clamping plate 73 through a third fastener 72 (such as a bolt or nut). The clamping plate 73 is a metal plate adapted to the thickness of the flange plate. The other end of the bending plate 71 cooperates with the clamping plate 73 to clamp the other end of the flange plate of the first extension rod 42, thereby realizing a firm connection between the snap-fit ​​assembly 7 and the first extension rod 42. A threaded sleeve is vertically fixed to the upper surface of the bent plate 71. It is a metal internally threaded sleeve that is compatible with the fastening bolt 76. A snap-fit ​​plate 75 connects the threaded sleeve to the support frame 11. One end of the snap-fit ​​plate has a hook. A blind hole matching the hook is pre-drilled at the bottom of the support frame 11. During installation, the hook is inserted into the blind hole to achieve initial positioning of the snap-fit ​​plate 75 and the support frame 11. The other end of the snap-fit ​​plate 75 has a fastening bolt 76 that passes through it. After the fastening bolt 76 passes through the snap-fit ​​plate 75, it is threadedly connected to the threaded sleeve. Tightening the bolt securely connects the support frame 11 and the bent plate 71, thus fixing the tensioning platform 1 to the support mechanism. This snap-fit ​​assembly 7 structure, through "hook positioning + bolt locking," eliminates the need for precise alignment at high altitudes during installation. Initial fixing can be completed quickly before locking, significantly improving the efficiency of high-altitude installation. The detachable design also facilitates later disassembly and reuse.

[0032] Working principle of this utility model: The working principle of this adjustable portal girder tensioning platform 1 is based on the design concept of "modular assembly + detachable connection + adaptive adjustment". The specific process and force transmission process are as follows: Preliminary preparation and ground pre-assembly: Before construction, pre-assembly of some structures is completed on the ground, including: assembling the connectors with support rods 41 and the first extension rod 42 into a complete horizontal member 4; assembling the connectors with diagonal braces 51, the second extension rod 52, the rectangular frame 53, the screw rod 54, and the adjusting nut 55 into a complete diagonal brace member 5; and pre-connecting the bending plate 71, the clamping plate 73, and the threaded sleeve of the snap-fit ​​assembly 7. Ground pre-assembly can reduce the number of parts and assembly steps for high-altitude operations, and reduce the difficulty and safety risks of high-altitude operations.

[0033] Installation of the connecting seat and the column: After the ground pre-assembly is completed, the workers use the climbing equipment to install the upper connecting seat 2 and the lower connecting seat 3 at the designated height positions on the column. The mounting bolts 62 of the first fastener 6 are passed through the mounting holes of the upper connecting seat 2 and the lower connecting seat 3 and tightened with the pre-embedded threaded sleeves 74 in the column to firmly fix the connecting seat to the column. This process only requires the operation of the mounting bolts 62 and does not require additional processing, making the operation simple.

[0034] High-altitude assembly of the support mechanism: Weld one end of the pre-assembled horizontal member 4 on the ground to the upper connecting seat 2 and extend the other end to a preset position on one side of the cap beam; Hinge one end of the diagonal brace 51 of the diagonal brace member 5 to the lower connecting seat 3, and connect the other end to the second extension rod 52 through a connector. Then, mate the rectangular frame 53 of the second extension rod 52 with the screw 54. The other end of the screw 54 is hinged to the lower end of the first extension rod 42. Rotate the adjusting nut 55 to fine-tune the length of the screw 54 so that the diagonal brace member is in a taut state and forms a stable triangular support with the horizontal member 4. At this time, the support mechanism is assembled and has load-bearing capacity.

[0035] Installation of tensioning platform 1: The tensioning platform 1 (support frame 11 + support plate 12) assembled on the ground is hoisted above the transverse member 4 of the support mechanism. First, the hook part of the snap-fit ​​plate 75 is snapped into the blind hole at the bottom of the support frame 11 to achieve initial positioning. Then, the bending plate 71 and the clamping plate 73 of the snap-fit ​​assembly 7 are snapped onto the flange plate of the first extension rod 42 and locked by the third fastener 72. Finally, the fastening bolt 76 is screwed through the snap-fit ​​plate 75 and the threaded sleeve to make the tensioning platform 1 firmly connected to the transverse member 4, thus completing the installation of the entire platform.

[0036] Operation Process and Force Transfer: During tensioning, the operators and equipment are positioned on the support plate 12. The load is sequentially transferred through the support plate 12 to the support frame 11, then through the snap-fit ​​assembly 7 to the transverse members 4 and the diagonal bracing members 5, and finally borne by the columns, forming a complete force transfer path. Furthermore, if it is necessary to adapt to cap beams of different sizes or adjust the position of the tensioning platform 1, the first extension rod 42 and the second extension rod 52 of different lengths can be replaced by disassembling the connecting parts, achieving flexible adjustment of the platform.

[0037] Disassembly and Recycling: After the work is completed, disassemble the components in the reverse order of installation. First, loosen the fastening bolts 76 and the third fastener 72, and remove the tensioning platform 1. Then, disassemble the connecting parts of the diagonal brace 5 and the transverse member 4, and remove the various rods of the support mechanism. Finally, loosen the first fastener 6 and remove the upper connecting seat 2 and the lower connecting seat 3. All components are recyclable and can be reused in subsequent projects after inspection and maintenance, reducing construction costs.

[0038] Through the above structural design and workflow, the adjustable portal girder tensioning platform 1 effectively simplifies the component structure, reduces high-altitude assembly procedures, lowers construction difficulty and safety risks, and at the same time has good versatility and stability, and can meet the tensioning operation requirements of different types of portal girder.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. An adjustable portal girder tensioning platform, characterized in that, include: Tensioning platform (1) located on one side of the cap beam; Multiple sets of support mechanisms are spaced apart along the length of the tensioning platform (1). Each support mechanism includes an upper connecting seat (2), a lower connecting seat (3), a transverse member (4), and a diagonal brace (5). The upper connecting seat (2) and the lower connecting seat (3) are detachably connected to the column via a first fastener (6). One end of the transverse member (4) is fixedly connected to the upper connecting seat (2), and the other end of the transverse member (4) abuts against the lower part of the tensioning platform (1). The diagonal brace (5) is inclined, with one end hinged to the lower connecting seat (3) and the other end located below the tensioning platform (1) and hinged to the transverse member. A snap-fit ​​assembly (7) is detachably connected to the other end of the transverse bar, and the snap-fit ​​assembly (7) is detachably connected to the tensioning platform (1).

2. The adjustable portal girder tensioning platform according to claim 1, characterized in that, The transverse member (4) includes: Support rod (41), one end of which is fixedly connected to the upper connecting seat (2); and The first extension rod (42) and the connector, one end of the first extension rod (42) is detachably connected to the other end of the support rod (41) through the connector, the first extension rod (42) abuts against the tensioning platform (1) below, and a snap-fit ​​assembly (7) is detachably connected to the first extension rod (42).

3. The adjustable portal girder tensioning platform according to claim 2, characterized in that, The diagonal bracing member (5) includes: The diagonal brace (51) has one end hinged to the lower connecting seat (3); The second extension rod (52) has one end detachably connected to the other end of the diagonal brace (51) via the connector, and the other end of the second extension rod (52) is connected to the first extension rod (42).

4. The adjustable portal girder tensioning platform (1) according to claim 3, characterized in that, The diagonal brace (5) also includes: A rectangular frame (53) is fixedly installed at the other end of the second extension rod (52). One end of a screw (54) is inserted through the rectangular frame (53). The screw (54) is threaded through both sides of the rectangular frame (53) and an adjusting nut (55) is threaded to it. The other end of the screw (54) is hinged to the lower end of the first extension rod (42).

5. The adjustable portal girder tensioning platform according to claim 4, characterized in that, The support rod (41), the first extension rod (42), the diagonal brace (51), and the second extension rod (52) are all made of I-beams; The connector includes: Two connecting square tubes (43) are located between the two flanges of the I-beam and on both sides of its web. The two ends of the connecting square tubes (43) are respectively inserted into the two adjacent connected I-beams. A connecting sleeve (44) is disposed opposite to the connecting square tube (43) and sleeved around the periphery of the connection between the two I-beams, and The second fastener is provided at both ends of the connecting square tube (43), and the second fastener is provided through the connecting sleeve (44), the I-beam and the connecting steel pipe.

6. The adjustable portal girder tensioning platform according to claim 5, characterized in that, The tensioning platform (1) includes: A support frame (11), and a plurality of said snap-fit ​​components (7) are arranged in a rectangular array around the periphery of the support frame (11); and A support plate (12) is fixedly connected within the support frame (11).

7. The adjustable portal girder tensioning platform according to claim 6, characterized in that, The snap-fit ​​assembly (7) includes: A bending plate (71) is attached at one end to one end of the upper flange of the first extension rod (42), and the other end of the bending plate (71) extends toward the other end of the flange of the first extension rod (42). A clamping plate (73) is connected to the other end of the bending plate (71) via a third fastener (72), and the other end of the bending plate (71) cooperates with the clamping plate (73) to engage with the other end of the flange of the first extension rod (42). A mounting threaded sleeve (61) is vertically fixed to the upper surface of the bent plate (71); A snap-fit ​​plate (75) is detachably connected to the bottom of the support frame (11); and The fastening bolt (76) is active through the snap-fit ​​plate (75) and threadedly connected to the mounting threaded sleeve (61).

8. The adjustable portal girder tensioning platform according to claim 7, characterized in that, The bottom of the support frame (11) is provided with blind holes; One end of the snap-fit ​​plate (75) is provided with a hook portion that matches the blind hole, and the other end of the snap-fit ​​plate (75) is provided with the fastening bolt (76).

9. The adjustable portal girder tensioning platform according to any one of claims 5 to 8, characterized in that, The first fastener (6) includes: Pre-embedded threaded sleeve (74) in the column; and A number of mounting bolts (62) are provided. The upper connecting seat (2) and the lower connecting seat (3) are provided with multiple mounting holes. The mounting bolts (62) pass through the mounting holes and are threadedly connected to the threaded sleeve.

10. The adjustable portal girder tensioning platform according to claim 9, characterized in that, The second fastener includes a connecting bolt (45) and a connecting nut (46), wherein the connecting bolt (45) passes through the connecting sleeve (44), the I-beam and the connecting steel pipe and is threadedly connected to the connecting nut (46).

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