CN220432160U - T-shaped cross-railway light portal frame - Google Patents

Abstract

The utility model discloses a T-shaped cross-railway light portal frame, which belongs to the technical field of railway cross-railway portal frames, and is characterized in that a concrete base is arranged between railways, a bottom joint and a plurality of vertical rod standard joints are arranged on the concrete base, a rotary fixing assembly is further arranged between the plurality of vertical rod standard joints, the bottom joint, the plurality of vertical rod standard joints and the rotary fixing assembly form a column, two opposite sides of the rotary fixing assembly are respectively provided with a cross beam, the middle part of the cross beam is connected with the top of the column through a diagonal tension rod assembly, the cross beam is formed by connecting a plurality of horizontal standard joints with the rotary fixing assembly, and the column is assembled with the cross beam through the cooperation of the rotary fixing assembly and a hoisting system, so that the problems of high construction and installation cost, high difficulty and low efficiency of the large-size large-tonnage steel structural member welded integrally by the steel portal frame are solved from transportation to installation.

Description

T-shaped cross-railway light portal frame

Technical Field

The utility model belongs to the technical field of railway cross-track portal frames, and particularly relates to a T-shaped cross-track light portal frame.

Background

The railway cross-line portal frame is an installation carrier of equipment such as a high-definition linear array camera, station illumination, signals and the like. At present, the portal frames of the railway on-site transportation line are all steel structural members, each group of portal frames comprises 3 truss installation pieces, namely 2 upright posts and 1 cross beam, and 1 flat car is required to be occupied. Column dimensions: 0.8 m long, 0.8 m wide and 10.5 m high (weighing about 1.5 tons); the beam is 20.8 m/12 m long, 0.8 m wide and 1.45 m high (weight 3.8 ton/2.2 ton). When the existing steel portal frame is transported, 25 tons of track cranes and 2 flat cars are needed to be used as power supply sections, a material warehouse is formed in a power supply workshop, and upright posts and cross beams of the portal frame are hoisted to the flat cars to be reinforced and locked; during the hoisting of the portal frame, a track crane (25T crane) is adopted, the arm length of the crane is 17 meters, and the working radius is 10 meters. 2-section flatbed (a bogie is needed when a beam with the length of 20.8 meters is transported) is pulled by a track crane to enter a construction site; according to the field investigation feedback, the existing steel structure portal frame has the following defects in use:

(1) The large-size large-tonnage steel structural member welded by the steel structure portal frame is completed by large equipment from transportation to installation, and has high construction and installation cost, high difficulty and low efficiency.

(2) When the steel structure portal frame is constructed and installed, the cross beam of the steel structure portal frame needs to be hoisted, and sometimes the overhead contact system needs to be unhooked, so that the line blocking time is long, and the railway transportation is greatly interfered.

(3) The steel structure portal frame generally adopts hot dip coating and coating to prevent rust, and is easy to rust and corrode after long-term use due to different process quality, and needs to be subjected to periodic rust removal, so that the maintenance cost and the difficulty are both relatively high.

(4) The steel structure portal frame can not carry out corresponding adaptive modification on different railway line layouts and different surrounding environments of the lines, such as a plurality of railway lines, a double-line railway line and a single-line railway line, and the construction complexity is further improved.

Disclosure of Invention

To solve the problems set forth in the background art. The T-shaped cross-railway light portal frame can be applied to double-line railway lines, and has the characteristics of realizing rapid installation of a cross beam by manpower without operating by large equipment or unhooking a contact net, greatly reducing personnel investment, improving operating efficiency and realizing personnel reduction and synergy.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a T-shaped cross-railway light portal frame comprises a concrete base arranged between railways, wherein a bottom section and a plurality of vertical rod standard sections are arranged on the concrete base, a rotary fixing assembly is further arranged between the vertical rod standard sections, and the bottom section, the vertical rod standard sections and the rotary fixing assembly form a stand column;

the two opposite sides of the rotary fixing assembly are respectively provided with a cross beam, the middle part of the cross beam is connected with the top of the upright post through a diagonal draw bar assembly, and the cross beam is formed by interconnecting a plurality of horizontal standard joints with the rotary fixing assembly;

the upright post is assembled with the cross beam through the matching of the rotary fixing component and a hoisting system;

the bottom section comprises four chord members I, the chord members I are connected through a plurality of connecting rods I to form a cuboid, the bottoms of the chord members I are provided with mounting bases connected with concrete bases, a plurality of web members I are arranged between the chord members I, and a bolt mounting plate I is arranged at the corner of the top of the cuboid;

the standard section of the vertical rod comprises four second chords, the second chords are connected through a plurality of second connecting rods to form a cuboid, the corner points at two ends of the cuboid are respectively provided with a second bolt mounting plate, and a plurality of second web members are arranged between the second chords;

the horizontal standard section comprises four chord members III, the chord members III are connected through a plurality of connecting rods to form a cuboid, bolt mounting plates III are respectively arranged at corner points of two ends of the cuboid, a plurality of web members III are further arranged between the chord members III, a plurality of mounting cavities are arranged on the cuboid at intervals through the plurality of connecting rods, and mounting bars are arranged at corner points of the mounting cavities.

Preferably, the rotation fixing assembly comprises a fixing assembly and a rotation assembly;

the fixed assembly comprises a fixed frame connected with the vertical rod standard section, a fixed mounting plate is arranged at the top of the fixed frame, a rotary groove is formed in the center of the fixed frame, a plurality of limiting holes are formed in the outer side of the rotary groove in a surrounding mode, and fixed mounting holes are formed in corner points of the fixed mounting plate;

the rotating assembly comprises a supporting frame, a rotating mounting plate is arranged at the bottom of the supporting frame, a rotating boss matched with the rotating groove is arranged at the center of the supporting frame, a plurality of arc-shaped positioning grooves are arranged on the outer side of the rotating boss in a surrounding mode, the arc-shaped positioning grooves are in one-to-one correspondence with the limiting holes, threaded holes corresponding to the fixed mounting holes are formed in corner points of the rotating mounting plate, limiting bolts are arranged in the arc-shaped positioning grooves, the limiting bolts penetrate through the arc-shaped positioning grooves and are connected with the limiting holes, and two single-hole mounting plates and two double-hole mounting plates are respectively arranged on two sides, adjacent to the rotating mounting plate, of the supporting frame.

Preferably, the diagonal draw bar assembly comprises two long draw bars and two short draw bars, the long draw bars and the short draw bars are connected through an adjusting screw, one end of each long draw bar is connected with the top of the upright post through a first hinge, and one end of each short draw bar is connected with the middle of the cross beam through a second hinge.

Preferably, the hoisting system comprises hoisting equipment arranged at the top of the upright post and a lifting jacket sleeved on the upright post, wherein two opposite sides of the lifting jacket are respectively provided with a bracket, and a plurality of sections of horizontal standard sections are arranged on the brackets.

Preferably, the hoisting equipment comprises two sliding clamping grooves which are connected to the second connecting rod in a clamping mode, the two sliding clamping grooves are connected through a transverse hanging rod, two ends of the transverse hanging rod are respectively provided with a manual hoist, and the sliding clamping grooves are further provided with fastening bolts for fixing and limiting the sliding clamping grooves to the second connecting rod.

Preferably, the bracket comprises a lifting frame, a supporting plate is arranged at the top of the lifting frame, baffles are arranged on two sides of the supporting plate, a plurality of fixed compression bars are arranged between the baffles, and a plurality of first mounting plates are arranged on the side wall of the lifting frame.

Preferably, the lifting jacket comprises a limiting frame formed by matching two concave parts through a long pin shaft and a ring nut, the concave parts comprise two concave frames, the two concave frames are connected through a plurality of first vertical rods, a plurality of second mounting plates are arranged on one side of each concave frame and correspond to the mounting plates one by one, limiting supporting plates are arranged on one side of each second mounting plate, and pulleys are arranged at corner points of one side, opposite to the two concave parts, of each concave part.

Preferably, the cross beam is provided with a grid pedal.

Preferably, the bottom section, the vertical rod standard section, the rotary fixing assembly and the horizontal standard section are made of aviation aluminum alloy sections, and the section of each section adopts a cross diagonal rib plate structure.

Preferably, the bottom section, the vertical rod standard section, the rotary fixing assembly and the horizontal standard section adopt a fluorocarbon paint process to treat the surface, so that the surface has extremely strong corrosion and rust resistance.

Compared with the prior art, the utility model has the beneficial effects that:

1. the T-shaped cross-railway light portal frame is structurally designed into a modularized splicing structure, the whole working structure is formed by splicing truss units (a bottom section, a vertical rod standard section, a rotary fixing assembly and a horizontal standard section) with different specifications, each truss unit is lighter in weight and can be carried by manpower, the portal frame is provided with an ingenious spliced auxiliary mounting structure (a hoisting system), the portal frame can be lifted up and down along a stand column after being spliced, two sides of the stand column are respectively provided with a group of cross beams, the cross beams are respectively arranged right above two adjacent lines, and diagonal tension rod assemblies are arranged between the two groups of cross beams and the stand column, so that a stable triangular structure is formed. The cross beam and the upright posts are all in modularized splicing structures, wherein the cross beam consists of 2 or more horizontal standard sections, and grid pedals are paved on the cross beam. The stand comprises a bottom section, a plurality of montant standard sections and 1 rotatory fixed subassembly, rotatory fixed subassembly mainly used crossbeam and stand's connection, through rotatory function, can realize that the crossbeam is installed the back in circuit outside, it is fixed to the circuit directly over again, thereby need not to hang the contact net, realize that the installation is safe, convenient, high-efficient, and all be equipped with the bolt mounting panel on the truss unit, so that each other quick location installation, wherein its atress model is the simply supported beam behind the horizontal standard section equipment crossbeam, receive the lower extreme under dead weight and maintenance personal load and receive the moment of action of pulling the upper end pressurized, therefore horizontal truss lower extreme bolt mounting panel three is equipped with two bolted connection holes, and upper portion bolt mounting panel three only establishes a bolted connection hole.

2. The T-shaped cross-railway light portal frame solves the problems that a large-size large-tonnage steel structural member is welded integrally by the steel structure portal frame through modularly arranging the bottom section, the vertical rod standard section, the rotary fixing component and the horizontal standard section, and the transportation and the installation are completed by large-scale equipment, so that the construction and installation cost is high, the difficulty is high and the efficiency is low;

3. the T-shaped cross-railway light portal frame is characterized in that the bottom section, the vertical rod standard section, the rotary fixing component and the horizontal standard section are made of aviation aluminum alloy sections, and the surface of the T-shaped cross-railway light portal frame is provided with extremely strong corrosion resistance and rust resistance through fluorocarbon paint technology, so that a portal frame structure is well protected, and the problems that the portal frame with a steel structure is generally subjected to hot dipping and paint rust resistance, is easy to rust corrosion after long-term use due to different technological qualities, needs to be subjected to periodic rust removal, and is high in maintenance cost and difficulty are solved;

4. when the T-shaped cross-railway light portal frame is installed, two groups of cross beams are assembled and then are respectively installed on brackets on two sides of an upright post, the length direction of each cross beam is placed along the direction of a railway line, the cross beams are lifted to the position of a rotary fixing assembly through a lifting system after the cross beams are installed, the two groups of cross beams are fixed on the rotary fixing assembly through check bolts, the rotary fixing assembly is rotated to drive the two groups of cross beams to be right above a line, and finally the rotary assembly is fixed.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic view of the installation of the present utility model;

FIG. 3 is a schematic perspective view of the components of the bottom section;

FIG. 4 is a schematic perspective view of the parts of the standard section of the vertical rod;

FIG. 5 is a schematic perspective view of a part of a horizontal standard joint;

FIG. 6 is a schematic perspective view of the components of the diagonal draw bar assembly;

FIG. 7 is a schematic perspective view of the components of the lifting jacket;

FIG. 8 is a schematic perspective view of a part of the bracket;

FIG. 9 is a schematic perspective view of a component part of the securing assembly;

FIG. 10 is a schematic perspective view of a component of the rotating assembly;

FIG. 11 is a schematic perspective view of a part of the hoisting device;

in the figure: 1. a concrete base; 2. a bottom section; 3. a vertical rod standard section; 4. a horizontal standard section; 5. a diagonal draw bar assembly; 6. a grid pedal; 7. lifting the outer sleeve; 8. a bracket; 9. a fixing assembly; 10. a rotating assembly; 11. hoisting equipment; 201. a first bolt mounting plate; 202. a first connecting rod; 203. a chord member I; 204. a mounting base; 205. a web member I; 301. a second bolt mounting plate; 302. a second chord member; 303. a second web member; 304. a second connecting rod; 401. a third bolt mounting plate; 402. a connecting rod III; 403. a web member III; 404. a chord III; 501. a first hinge; 502. a long pull rod; 503. adjusting a screw; 504. a short pull rod; 505. a second hinge; 701. a first vertical rod; 702. a limit frame; 703. a long pin shaft; 704. a pulley; 705. a ring nut; 706. a limit supporting plate; 707. a second mounting plate; 801. fixing the compression bar; 802. a supporting plate; 803. lifting the frame; 804. a first mounting plate; 805. a baffle; 901. a fixed frame; 902. fixing the mounting hole; 903. a rotary groove; 904. a limiting hole; 905. a fixed mounting plate; 1001. an arc-shaped positioning groove; 1002. rotating the boss; 1003. a double-hole mounting plate; 1004. a limit bolt; 1005. a single hole mounting plate; 1006. rotating the mounting plate; 1101. a hand hoist; 1102. a transverse boom; 1103. a sliding clamping groove; 1104. and (5) fastening a bolt.

Description of the embodiments

The following description of the embodiments of the present utility model 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 utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-11, the present utility model provides the following technical solutions: a T-shaped cross-railway light portal frame comprises a concrete base 1 arranged between railways, wherein a bottom section 2 and a plurality of vertical rod standard sections 3 are arranged on the concrete base 1, a rotary fixing component is further arranged between the plurality of vertical rod standard sections 3, and the bottom section 2, the plurality of vertical rod standard sections 3 and the rotary fixing component form a column;

the two opposite sides of the rotary fixing assembly are respectively provided with a cross beam, the middle part of the cross beam is connected with the top of the upright post through a diagonal draw bar assembly 5, and the cross beam is formed by interconnecting a plurality of horizontal standard joints 4 and the rotary fixing assembly;

the upright post is assembled with the cross beam through the matching of the rotary fixing component and a hoisting system;

the bottom section 2 comprises four chord members I203, the chord members I203 are connected through a plurality of connecting rods I202 to form a cuboid, the bottom of the chord member I203 is provided with a mounting base 204 connected with the concrete base 1, a plurality of web members I205 are arranged between the chord members I203, and the corner of the top of the cuboid is provided with a bolt mounting plate I201;

the vertical rod standard section 3 comprises four second chords 302, the second chords 302 are connected through a plurality of second connecting rods 304 to form a cuboid, two bolt mounting plates 301 are respectively arranged at corner points at two ends of the cuboid, and a plurality of second web members 303 are further arranged between the second chords 302;

the horizontal standard section 4 comprises four chord members three 404, the chord members three 404 are connected through a plurality of connecting rods three 402 to form a cuboid, bolt mounting plates three 401 are respectively arranged at corner points at two ends of the cuboid, a plurality of web members three 403 are further arranged between the chord members three 404, a plurality of mounting cavities are arranged on the cuboid at intervals through the plurality of connecting rods three 402, and mounting bars are arranged at corner points of the mounting cavities.

Specifically, the rotation fixing assembly comprises a fixing assembly 9 and a rotation assembly 10;

the fixed component 9 comprises a fixed frame 901 connected with the vertical rod standard section 3, a fixed mounting plate 905 is arranged at the top of the fixed frame 901, a rotary groove 903 is formed in the center of the fixed frame, a plurality of limiting holes 904 are formed in the outer side of the rotary groove 903 in a surrounding mode, and a fixed mounting hole 902 is formed in the corner point of the fixed mounting plate 905;

the rotating assembly 10 comprises a supporting frame, a rotating mounting plate 1006 is arranged at the bottom of the supporting frame, a rotating boss 1002 matched with the rotating groove 903 is arranged at the center of the supporting frame, a plurality of arc-shaped positioning grooves 1001 are arranged on the outer side of the rotating boss 1002 in a surrounding mode and correspond to the limiting holes 904 one by one, threaded holes corresponding to the fixed mounting holes 902 are formed in the corner points of the rotating mounting plate 1006, limiting bolts 1004 are arranged in the arc-shaped positioning grooves 1001 and penetrate through the arc-shaped positioning grooves 1001 to be connected with the limiting holes 904, two single-hole mounting plates 1005 and two double-hole mounting plates 1003 are respectively arranged on two sides, adjacent to the rotating mounting plate 1006, of the supporting frame, through structural parameters and relative position setting, the rotating angle positioning of the rotating assembly 10 is achieved, the rotating assembly can be guaranteed to be quickly rotated to a designated position without back and forth adjusting angles, and meanwhile the limiting bolts 1004 also play a role of limiting the longitudinal displacement of the rotating assembly 10, so that overturning phenomenon cannot occur in the process of driving a cross beam to rotate and mounting. After the beam rotates to a designated position along with the rotating assembly 10, the rotating assembly 10 and the fixing assembly 9 are fixedly installed by using the lockbolts.

Specifically, diagonal draw bar assembly 5 includes two long pull bars 502 and two short pull bars 504, connect through an adjusting screw 503 between long pull bars 502 and the short pull bars 504, long pull bars 502 one end is connected with the stand top through articulated elements one 501, short pull bars 504 one end is connected with the crossbeam middle part through articulated elements two 505, through rotating adjusting screw 503, the length fine setting between long pull bars 502 and the short pull bars 504 can be realized, on the one hand, can compensate the relative position error that causes because of the installation between crossbeam and the stand, improve diagonal draw bar installation's convenience, on the other hand, after diagonal draw bar installation is accomplished, the accessible adjusting screw 503 shortens the length of whole diagonal draw bar, thereby guarantee that cantilever stand and the moment between the crossbeam are in taut state, guarantee structural stability.

Specifically, the hoisting system comprises hoisting equipment 11 arranged at the top of the upright post and a lifting jacket 7 sleeved on the upright post, wherein a bracket 8 is respectively arranged on two opposite sides of the lifting jacket 7, and a plurality of sections of horizontal standard sections 4 are arranged on the bracket 8.

Specifically, the lifting device 11 includes two sliding clamping grooves 1103 that are clamped on the second connecting rod 304, the two sliding clamping grooves 1103 are connected through a transverse suspension rod 1102, two ends of the transverse suspension rod 1102 are respectively provided with a manual hoist 1101, and the sliding clamping grooves 1103 are also provided with fastening bolts 1104 for fixing and limiting the sliding clamping grooves 1103 on the second connecting rod 304 so as to realize lifting of the transverse beam.

Specifically, the bracket 8 includes a lifting frame 803, a supporting plate 802 is disposed at the top of the lifting frame 803, baffles 805 are disposed on two sides of the supporting plate 802, a plurality of fixing compression bars 801 are disposed between the baffles 805, a plurality of first mounting plates 804 are disposed on the side wall of the lifting frame 803, the supporting plate 802 is used for supporting the horizontal standard section 4, the baffles 805 are used for preventing the horizontal standard section 4 from falling transversely, and the fixing compression bars 801 are of threaded connection structures and are used for preventing the horizontal standard section 4 from overturning along the length direction.

Specifically, the lifting jacket 7 comprises a limiting frame 702 formed by matching two concave parts through a long pin 703 and a ring nut 705, the concave parts comprise two concave frames, the two concave frames are connected through a plurality of first vertical rods 701, one side of each concave frame is provided with a plurality of second mounting plates 707, the second mounting plates 707 are respectively in one-to-one correspondence with the first mounting plates 804, one side of each second mounting plate 707 is provided with a limiting supporting plate 706, the corner points of the opposite sides of the two concave parts are respectively provided with a pulley 704, the pulley is in symmetrical splicing structure design and is divided into a left concave part and a right concave part, the left concave part and the right concave part are connected in an inserting mode through the long pin 703, lifting lugs are arranged on the upper parts of the long pin 703, threads are arranged at the bottoms of the long pin 703 and are in fastening connection with the ring nut 705, and accordingly the structure of the lifting jacket 7 is fixed. The lifting jacket 7 is provided with a mounting plate two 707 and a limiting supporting plate 706 on the side surface, so that the height difference compensation device (bracket 8) can be conveniently connected, pulleys are arranged at 8 opposite angles in the lifting jacket, and the pulleys 704 play a role in guiding along the upright column rolling when lifting equipment 11 lifts, so that the whole lifting operation is ensured to be safe and smooth.

Specifically, a grid pedal 6 is arranged on the cross beam, so that the subsequent maintainer can walk conveniently.

Specifically, the bottom section 2, the vertical rod standard section 3, the rotary fixing assembly and the horizontal standard section 4 are made of aviation aluminum alloy sections, and the sections of the sections adopt cross diagonal rib plate structures so as to improve the strength of the rod piece.

Specifically, the bottom section 2, the vertical rod standard section 3, the rotary fixing assembly and the horizontal standard section 4 adopt fluorocarbon paint technology to treat the surface, so that the surface has extremely strong corrosion and rust resistance.

The utility model relates to a T-shaped cross-railway light portal frame, which is designed according to the following standard:

(1) Steel structural design criteria GB50017-2017.

(2) "aluminum alloy structural design Specification" GB50429-2007.

(3) Building Structure load Specification GB50009-2012.

(4) Building earthquake-proof design Specification GB50011-2010 (2016 edition).

(5) Building foundation design Specification GB50007-2011.

(6) General Specification for Steel construction GB55006-2021.

(7) General Specification for engineering construction GB55001-2021.

(8) "general anti-seismic Specification for buildings and municipal works" GB55002-2021.

(9) General Specification for building and municipal Foundation GB55003-2021.

The working principle and the using flow of the utility model are as follows: the T-shaped cross-railway light portal frame is suitable for the situation that the two railway lines are large in distance and meet the foundation pit excavation and foundation pier pouring conditions according to the on-site railway line environment, and comprises the following installation steps:

1. the bottom section 2, the vertical rod standard section 3, the rotary fixing component and the horizontal standard section 4 are transported to the outside of the construction point through a common truck and then transported to the construction point manually.

2. And pouring a concrete base 1 between two railway lines, quickly aligning the bottom joint 2 to the pre-buried bolts of the concrete base 1 after the concrete base is completed, pre-tightening the bolts in place by using a spanner, and carrying out next working procedure construction after detecting the verticality of the bottom joint 2 according to related standards and conforming to the standards.

3. The lifting jacket 7 is quickly sleeved into the bottom section 2, brackets 8 are respectively arranged on two sides of the lifting jacket 7, then the vertical rod standard sections 3 are assembled to a specified height, then a rotary fixing component (the height of which is required to be ensured to be larger than the height of a railway contact network on site) is arranged, a vertical rod standard section 3 is arranged on the top of the rotary fixing component, and a lifting device 11 is arranged on the vertical rod standard section 3 on the top.

4. Then two or more horizontal standard joints 4 are assembled to form two groups of cross beams, then the two groups of cross beams are respectively arranged on the bracket 8, the length direction of the cross beams is arranged along the direction of a railway line, and the manual hoist 1101 on the lifting device 11 is connected with the long pin shaft 703 on the lifting jacket 7, so that the overall lifting is controlled.

5. When the beam is lifted to be flush with the rotating assembly 10 through the lifting device 11, the beam is fixed on the rotating and fixing assembly through the check bolt, the rotating and fixing assembly is rotated to drive the beam to be right above the railway line, and finally the rotating assembly 10 is fixed on the fixing assembly 9, so that the installation can be completed.

6. After the installation is completed, the disassembly of the hoisting system can be started, and the disassembly mode is as follows: the bracket 8 is separated from the cross beam, the lifting jacket 7 is arranged under the lifting jacket 11 through the lifting equipment 11, then the lifting equipment 11 is detached from the top of the upright post respectively, the bracket 8 is separated from the lifting jacket 7, and the long pin shaft 703 and the lifting nut 705 on the lifting jacket 7 are separated, so that the lifting jacket 7 leaves the upright post, and all the installation and the detachment are completed.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The T-shaped cross-railway light portal comprises concrete bases (1) arranged between railways, and is characterized in that: the concrete base (1) is provided with a bottom section (2) and a plurality of vertical rod standard sections (3), a rotary fixing assembly is arranged between the vertical rod standard sections (3), and the bottom section (2), the vertical rod standard sections (3) and the rotary fixing assembly form a column;

the two opposite sides of the rotary fixing assembly are respectively provided with a cross beam, the middle part of the cross beam is connected with the top of the upright post through a diagonal draw bar assembly (5), and the cross beam is formed by interconnecting a plurality of horizontal standard joints (4) and the rotary fixing assembly;

the upright post is assembled with the cross beam through the matching of the rotary fixing assembly and a hoisting system;

the bottom section (2) comprises four chord members I (203), the chord members I (203) are connected through a plurality of connecting rods I (202) to form a cuboid, a mounting base (204) connected with the concrete base (1) is arranged at the bottom of the chord member I (203), a plurality of web members I (205) are arranged between the chord member I (203), and a bolt mounting plate I (201) is arranged at the corner point of the top of the cuboid;

the vertical rod standard section (3) comprises four chord members II (302), the chord members II (302) are connected through a plurality of connecting rods II (304) to form a cuboid, bolt mounting plates II (301) are respectively arranged at corner points at two ends of the cuboid, and a plurality of web members II (303) are arranged between the chord members II (302);

the horizontal standard section (4) comprises four chord members three (404), the chord members three (404) are connected through a plurality of connecting rods three (402) to form a cuboid, bolt mounting plates three (401) are respectively arranged at corner points at two ends of the cuboid, a plurality of web members three (403) are further arranged between the chord members three (404), a plurality of mounting cavities are arranged on the cuboid at intervals through the plurality of connecting rods three (402), and mounting bars are arranged at corner points of the mounting cavities.

2. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the rotary fixing assembly comprises a fixing assembly (9) and a rotary assembly (10);

the fixing assembly (9) comprises a fixing frame (901) connected with the vertical rod standard section (3), a fixing mounting plate (905) is arranged at the top of the fixing frame (901), a rotary groove (903) is formed in the center of the fixing frame, a plurality of limiting holes (904) are formed in the outer side of the rotary groove (903) in a surrounding mode, and a fixing mounting hole (902) is formed in an angular point of the fixing mounting plate (905);

the rotary assembly (10) comprises a supporting frame, a rotary mounting plate (1006) is arranged at the bottom of the supporting frame, a rotary boss (1002) matched with the rotary groove (903) is arranged at the center of the supporting frame, a plurality of arc-shaped positioning grooves (1001) are arranged on the outer side of the rotary boss (1002) in a surrounding mode, the arc-shaped positioning grooves and the limiting holes (904) are in one-to-one correspondence, threaded holes corresponding to the fixed mounting holes (902) are formed in the corner points of the rotary mounting plate (1006), limiting bolts (1004) are arranged in the arc-shaped positioning grooves (1001), the arc-shaped positioning grooves (1001) penetrate through the arc-shaped positioning grooves and are connected with the limiting holes (904), and two single-hole mounting plates (1005) and two double-hole mounting plates (1003) are respectively arranged on two sides of the supporting frame, which are adjacent to the rotary mounting plate (1006).

3. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the diagonal draw bar assembly (5) comprises two long draw bars (502) and two short draw bars (504), the long draw bars (502) are connected with the short draw bars (504) through an adjusting screw (503), one end of each long draw bar (502) is connected with the top of the corresponding upright column through a first hinge (501), and one end of each short draw bar (504) is connected with the middle of the corresponding cross beam through a second hinge (505).

4. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the hoisting system comprises hoisting equipment (11) arranged at the top of the upright post and a lifting jacket (7) sleeved on the upright post, wherein a bracket (8) is respectively arranged at two opposite sides of the lifting jacket (7), and a plurality of sections of horizontal standard joints (4) are arranged on the bracket (8).

5. A T-shaped cross-railway lightweight portal in accordance with claim 4, wherein: the hoisting device (11) comprises two sliding clamping grooves (1103) which are connected with the second connecting rod (304) in a clamping mode, the two sliding clamping grooves (1103) are connected through a transverse hanging rod (1102), two ends of the transverse hanging rod (1102) are respectively provided with a manual hoist (1101), and the sliding clamping grooves (1103) are further provided with fastening bolts (1104) which are used for fixing and limiting the sliding clamping grooves (1103) on the second connecting rod (304).

6. A T-shaped cross-railway lightweight portal in accordance with claim 4, wherein: the bracket (8) comprises a lifting frame (803), a supporting plate (802) is arranged at the top of the lifting frame (803), baffles (805) are arranged on two sides of the supporting plate (802), a plurality of fixed compression bars (801) are arranged between the baffles (805), and a plurality of mounting plates I (804) are arranged on the side wall of the lifting frame (803).

7. A T-shaped cross-railway lightweight portal in accordance with claim 6, wherein: the lifting jacket (7) comprises a limiting frame (702) formed by matching two concave parts through a long pin shaft (703) and an eye nut (705), the concave parts comprise two concave frames, the two concave frames are connected through a plurality of first vertical rods (701), a plurality of second mounting plates (707) are arranged on one side of each concave frame, the second mounting plates (707) are respectively in one-to-one correspondence with the first mounting plates (804), a limiting supporting plate (706) is arranged on one side of each second mounting plate (707), and pulleys (704) are respectively arranged at corner points on one side, opposite to the concave parts.

8. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the cross beam is provided with a grid pedal (6).

9. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the bottom section (2), the vertical rod standard section (3), the rotary fixing assembly and the horizontal standard section (4) are made of aviation aluminum alloy sections, and the section of each section adopts a cross diagonal rib plate structure.

10. A T-shaped cross-railway lightweight portal in accordance with claim 1, wherein: the bottom section (2), the vertical rod standard section (3), the rotary fixing assembly and the horizontal standard section (4) adopt a fluorocarbon paint process to treat the surface, so that the surface has extremely strong anti-corrosion and rust-proof capabilities.