Cable bridge for oil and gas station and manufacturing method thereof

Abstract

The invention relates to the technical field of oil and gas station construction, in particular to a cable bridge for an oil and gas station and a manufacturing method of the cable bridge, and aims to solve the problems that a traditional cable bridge structure is not high in torsional bearing capacity, beam-column joints can only be rigidly connected, factory processing is not easy, and a beam-column structure needs to be welded at high altitude on site. A structural beam of the cable bridge is designed into a structural form of an open-web truss, an open-web truss beam lower chord, an open-web truss beam upper chord and open-web vertical rods are made of square steel tubes, the square steel tubes serve as closed sections, and the torsional bearing capacity of the square steel tubes is higher than that of H-shaped steel or I-shaped steel with open sections. The web truss girders can evenly distribute torques transmitted by other vertical loads such as cable bridge box components and cable self weight to the upper chord members and the lower chord members. Each section of the hollow truss girder and the structural column can be processed in a factory, the hollow truss girder and the structural column are connected through a flange plate after each component is transported to a site, and the cable bridge for the oil and gas station is simple, light and convenient to install on site.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas station construction, and in particular to a cable bridge used in an oil and gas station and a manufacturing method thereof. Background Art

[0002] Long-distance pipelines need to be equipped with stations at certain intervals for pressure boosting, distribution, and cleaning. A large number of power and instrument cables need to be arranged in the station to connect the various equipment in the station with the transformer and between the various equipment. To facilitate the maintenance of the cables in the future, outdoor cables are generally placed in overhead bridge boxes, and the structural professionals set up cable trays for the cable bridge boxes.

[0003] Outdoor cable trays are generally made of steel structures, which have the characteristics of high strength, light weight, good overall rigidity and strong resistance to deformation. Steel structures are mainly composed of steel beams, steel columns and other components made of steel sections. The beam-column structural form and the beam-column node connection method are the key and difficulty of steel structure design.

[0004] Since the rigidity of the cable bridge box is limited, a support is generally required every 2m. The support is fixed on the cable bridge, which is composed of structural columns and structural beams. Structural columns are generally arranged every 6m. Beams are set between the columns, and the bridge box support is fixed on the structural beam every 2m. At the same time, the bridge box is generally arranged in multiple layers (2 to 3 layers) on the same route, so the support form is mostly "F" shaped.

[0005] The traditional cable bridge structure is a steel beam set between two steel columns. The connection between the beam and the column is bolted or fully welded, and can only be made into a rigid connection. The bridge box support is welded on the steel beam. The multi-layer bridge box support is welded on a single steel beam. The steel beam will bear the torque caused by the bridge box, cable deadweight and other vertical loads. Especially when the bridge box is set on only one side of the steel beam, all the bridge boxes, cable deadweight and other vertical loads will be converted into torque of the steel beam, which is not conducive to the stress of the steel beam. Compared with the bending, shear and tensile bearing capacity, the torsional bearing capacity of the steel beam is much smaller. In order to offset the torque, the cross-section of the steel beam needs to be made very large, which is very uneconomical. The bolted or fully welded connection between the beam and the column requires high-altitude welding at the construction site, which is not conducive to controlling the construction quality and will also cause hidden dangers to construction safety. Summary of the invention

[0006] The purpose of the present invention is to provide a cable tray for oil and gas stations and a manufacturing method thereof, so as to solve the problems of low torsional bearing capacity, rigid connection of beam-column nodes, difficulty in factory processing and need for on-site high-altitude welding of beam-column structures existing in traditional cable tray structures.

[0007] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0008] In a first aspect, the present invention provides a cable bridge for an oil and gas station, comprising: a hollow truss beam, a structural column, a cable bridge box support and a cable bridge box component;

[0009] The hollow truss beam comprises a hollow truss beam lower chord, a hollow truss beam upper chord and a hollow vertical bar, the hollow truss beam upper chord is arranged above the hollow truss beam lower chord, the hollow vertical bar is connected between the hollow truss beam upper chord and the hollow truss beam lower chord, and the hollow truss beam lower chord, the hollow truss beam upper chord and the hollow vertical bar are all arranged as square steel pipes;

[0010] At least two structural columns are provided, and the end of the upper chord of the hollow truss beam is connected to the structural column through a flange, and the end of the lower chord of the hollow truss beam is connected to the structural column through a flange;

[0011] One end of the cable bridge box support is connected to the lower chord of the hollow truss beam, and the other end is connected to the upper chord of the hollow truss beam;

[0012] The cable bridge box component is arranged on the side of the hollow truss beam and is supported and connected to the cable bridge box.

[0013] Furthermore,

[0014] The cable bridge box component comprises a cable bridge box and a cable bridge box bracket;

[0015] The cable bridge box bracket is connected to the cable bridge box support;

[0016] The cable bridge box is connected above the cable bridge box supporting arm.

[0017] Furthermore,

[0018] A plurality of the cable bridge box support arms are arranged at intervals along the length direction of the cable bridge box.

[0019] Furthermore,

[0020] A plurality of hollow-web vertical rods are arranged at intervals along the length direction of the upper chord of the hollow-web truss beam.

[0021] Furthermore,

[0022] Also includes a first flange and a second flange;

[0023] The first flange is connected to the end of the upper chord of the hollow truss beam;

[0024] The second flange is connected to the structural column;

[0025] The first flange is connected to the second flange.

[0026] Furthermore,

[0027] The first flange and the second flange are connected by bolts.

[0028] Furthermore,

[0029] Also includes a third flange and a fourth flange;

[0030] The third flange is connected to the end of the lower chord of the hollow truss beam;

[0031] The fourth flange is connected to the structural column;

[0032] The third flange is connected to the fourth flange.

[0033] Furthermore,

[0034] The third flange is connected to the fourth flange by bolts.

[0035] Furthermore,

[0036] The structural columns are configured as round steel pipes.

[0037] In a second aspect, the present invention provides a method for manufacturing a cable tray for an oil and gas station, comprising the following steps:

[0038] Step 1: Arrange the structural columns according to the cable routing and determine the structural height;

[0039] Step 2: Design the height and specifications of the hollow truss beam according to the column point position;

[0040] Step 3: Verify whether the column position and the height of the hollow truss beam meet the construction requirements. If not, repeat steps 1, 2 and 3 until the construction requirements are met, and proceed to step 4;

[0041] Step 4: Calculate the height and cross-sectional size of the lower chord of the hollow truss beam, the upper chord of the hollow truss beam and the hollow vertical bar according to the loads of the cables and bridge boxes, and determine the position and specifications of the hollow vertical bar;

[0042] Step 5: Determine the cross-sectional specifications of the structural columns;

[0043] Step 6: Draw the cable tray structure drawing.

[0044] Based on the above technical solutions, the technical effects that can be achieved by the present invention are:

[0045] The present invention designs the structural beam of the cable bridge as a hollow truss structure. The lower chord of the hollow truss beam, the upper chord of the hollow truss beam and the hollow vertical rod are made of square steel pipes. The square steel pipe is a closed section, and its torsional bearing capacity is higher than that of H-shaped steel or I-shaped steel with an open section. At the same time, the hollow truss beam can evenly distribute the torque transmitted by other vertical loads such as cable bridge box components and cable deadweight to the upper and lower chords; the connection between the hollow truss beam and the structural column adopts a flange connection form, each section of the hollow truss beam and the structural column can be processed in the factory, and after the components are transported to the site, the hollow truss beam and the structural column are connected by a flange, which solves the problems of low torsional bearing capacity, only rigid connection of beam-column nodes, difficulty in factory processing and need for on-site high-altitude welding of beam-column structures in traditional cable bridge structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A schematic diagram of the structure of a cable tray for an oil and gas station provided by an embodiment of the present invention;

[0048] Figure 2 This is a partial structural diagram of a cable tray used in an oil and gas station;

[0049] Figure 3 This is the overall effect diagram of the cable tray used in oil and gas stations;

[0050] Figure 4 It is a structural schematic diagram of the cable bridge when the hollow truss beam is in a rectangular shape;

[0051] Figure 5 It is a schematic diagram of the local structure of the cable bridge when the hollow truss beam is in a rectangular shape;

[0052] Figure 6 It is a structural schematic diagram of the cable bridge when the hollow truss beam is a parallelogram;

[0053] Figure 7 It is a schematic diagram of the local structure of the cable tray when the hollow truss beam is a parallelogram;

[0054] Figure 8 is the bending moment distribution diagram of the hollow truss beam;

[0055] Fig. 9 is the axial force distribution diagram of the hollow truss beam;

[0056] Fig.10 is the torque distribution diagram of the hollow truss beam;

[0057] Fig.11 The present invention is a flow chart of a method for manufacturing a cable tray for an oil and gas station.

[0058] Icons: 1-hollow truss beam; 11-hollow truss beam upper chord; 12-hollow truss beam lower chord; 13-hollow vertical bar; 2-structural column; 3-cable bridge box support; 4-cable bridge box component; 41-cable bridge box; 42-cable bridge box support arm; 5-first flange; 6-second flange; 7-third flange; 8-fourth flange. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0060] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0062] The present invention provides a cable bridge for oil and gas stations, comprising: a hollow truss beam 1, a structural column 2, a cable bridge box support 3 and a cable bridge box component 4; the hollow truss beam 1 comprises a hollow truss beam lower chord 12, a hollow truss beam upper chord 11 and a hollow vertical bar 13, the hollow truss beam upper chord 11 is arranged above the hollow truss beam lower chord 12, the hollow vertical bar 13 is connected between the hollow truss beam upper chord 11 and the hollow truss beam lower chord 12, ... and the hollow truss beam lower chord 12. The upper chord 11 of the web truss beam and the hollow vertical rod 13 are both set as square steel pipes; at least two structural columns 2 are set, the end of the upper chord 11 of the hollow truss beam is connected to the structural column 2 through a flange, and the end of the lower chord 12 of the hollow truss beam is connected to the structural column 2 through a flange; one end of the cable bridge box support 3 is connected to the lower chord 12 of the hollow truss beam, and the other end is connected to the upper chord 11 of the hollow truss beam; the cable bridge box component 4 is set on the side of the hollow truss beam 1, and is connected to the cable bridge box support 3.

[0063] The present invention designs the structural beam of the cable bridge as a hollow truss structure. The lower chord 12 of the hollow truss beam, the upper chord 11 of the hollow truss beam and the hollow vertical rod 13 are made of square steel pipes. The square steel pipe is a closed section, and its torsional bearing capacity is higher than that of H-shaped steel or I-shaped steel with an open section. At the same time, the hollow truss beam 1 can evenly distribute the torque transmitted by the cable bridge box component 4, the dead weight of the cable and other vertical loads to the upper and lower chords; the connection between the hollow truss beam 1 and the structural column 2 is in the form of a flange connection. Each section of the hollow truss beam 1 and the structural column 2 can be processed in the factory. After the components are transported to the site, the hollow truss beam 1 is connected to the structural column 2 through a flange, which solves the problems of low torsional bearing capacity, only rigid connection of beam-column nodes, difficulty in factory processing and the need for on-site high-altitude welding of beam-column structures in traditional cable bridge structures.

[0064] The following combination Figure 1-Figure 11 The structure and shape of the cable tray for oil and gas stations provided in this embodiment are described in detail.

[0065] Regarding the shape and structure of the hollow truss girder 1, in detail:

[0066] like Figure 1 , Figure 2 and Figure 3 As shown, the hollow truss beam 1 includes a hollow truss beam lower chord 12, a hollow truss beam upper chord 11 and a hollow vertical bar 13. The hollow truss beam upper chord 11 is arranged above the hollow truss beam lower chord 12. The hollow vertical bar 13 is connected between the hollow truss beam upper chord 11 and the hollow truss beam lower chord 12. The hollow truss beam lower chord 12, the hollow truss beam upper chord 11 and the hollow vertical bar 13 are all configured as square steel pipes. A plurality of hollow vertical bars 13 are spaced apart along the length direction of the hollow truss beam upper chord 11. The spacing of the hollow vertical bars 13 can be determined according to actual needs, for example, the spacing can be determined according to force calculation.

[0067] Regarding the shape and structure of the structural column 2, in detail:

[0068] At least two structural columns 2 are provided, the end of the upper chord 11 of the hollow truss beam is connected to the structural column 2 through a flange, and the end of the lower chord 12 of the hollow truss beam is connected to the structural column 2 through a flange; the structural column 2 is set as a round steel pipe. The structural column 2 of the round steel pipe has the same cross-sectional characteristics in all directions, which is conducive to controlling the out-of-plane slenderness ratio of the cable tray.

[0069] Regarding the shape and structure of the cable bridge box support 3 and the cable bridge box component 4, in detail:

[0070] One end of the cable bridge box support 3 is connected to the lower chord 12 of the hollow truss beam, and the other end is connected to the upper chord 11 of the hollow truss beam; the cable bridge box component 4 is arranged on the side of the hollow truss beam 1 and connected to the cable bridge box support 3.

[0071] Specifically, the cable bridge box component 4 includes a cable bridge box 41 and a cable bridge box support arm 42. The cable bridge box support arm 42 is fixed on the cable bridge box support 3, and the cable bridge box 41 is fixed on the cable bridge box support arm 42. The cable bridge box support arm 42 and the cable bridge box support 3 are mainly used to support the cable bridge box 41, and the cables are placed in the cable bridge box 41. If the cable bridge box 41 has multiple layers, multiple layers of cable bridge box support arms 42 are set. Multiple cable bridge box support arms 42 are arranged at intervals along the length direction of the cable bridge box 41. Since the rigidity of the cable bridge box 41 itself is limited, a cable bridge box support arm 42 and a cable bridge box support 3 are generally required to be arranged at intervals of 2m along the direction of the cable bridge box 41.

[0072] The cable bridge system composed of the hollow truss beam 1 and the structural column 2 is the main load-bearing component of the entire system. The hollow truss beam lower chord 12, the hollow truss beam upper chord 11 and the hollow vertical rod 13 together constitute the hollow truss beam 1. The bridge box, the dead weight of the cable and other vertical loads will be converted into bending moments of the cable bridge box support arm 42 and the cable bridge box support 3, and this bending moment will be transmitted to the hollow truss beam 1 as torque, and the torque is evenly distributed to the hollow truss beam lower chord 12 and the hollow truss beam upper chord 11 to bear.

[0073] The hollow truss beam 1 is connected to the flange pre-installed on the circular steel pipe structural column 2 through the flanges at both ends of the hollow truss beam lower chord 12 and the hollow truss beam upper chord 11 by bolts. The number and specifications of the bolts need to be determined through force calculation.

[0074] Specifically, the first flange 5 is connected to the end of the upper chord 11 of the hollow truss beam, the second flange 6 is connected to the structural column 2, and the first flange 5 and the second flange 6 are connected by bolts. The third flange 7 is connected to the end of the lower chord 12 of the hollow truss beam; the fourth flange 8 is connected to the structural column 2; the third flange 7 and the fourth flange 8 are connected by bolts.

[0075] The cable bridge for oil and gas stations provided in this embodiment includes multiple sections of hollow truss beams 1. Each section of the hollow truss beam 1 and the round steel tube structural column 2 can be processed in the factory. At the same time, flanges are pre-welded at the factory on both ends of the upper and lower chords of the hollow truss beam 1 and the round steel tube structural column 2. After the components are transported to the site, the hollow truss beam 1 and the flanges on the round steel tube structural column 2 can be directly connected with bolts.

[0076] When the cable bridge is in the standard length section, the hollow truss beam 1 can be processed into a rectangular hollow truss structure, and the cable bridge box support 3 and the cable bridge box 41 connected thereto can be directly welded to the truss beam. Specifically, the hollow truss beam upper chord 11 is located directly above the hollow truss beam lower chord 12, the hollow truss beam lower chord 12 and the hollow truss beam upper chord 11 are aligned up and down and arranged in parallel, the hollow vertical rod 13 can be arranged vertically, the first flange 5 and the second flange 6 are both arranged vertically, and the third flange 7 and the fourth flange 8 are both arranged vertically.

[0077] When the elevation of the cable bridge box 41 entering the house needs to be lowered, the hollow truss beam 1 can be processed into a parallelogram hollow truss structure, and the cable bridge box support 3 and the cable bridge box 41 connected thereto can also be directly welded to the truss beam. Specifically, the upper chord 11 of the hollow truss beam is located directly above the lower chord 12 of the hollow truss beam, and the lower chord 12 of the hollow truss beam and the upper chord 11 of the hollow truss beam are arranged in parallel, and the projections of the two on the horizontal plane are staggered and parallel, and the hollow vertical rod 13 can be arranged vertically or inclined as needed, and the first flange 5 and the second flange 6 are both arranged at an angle to the upper chord 11 of the hollow truss beam, and the third flange 7 and the fourth flange 8 are both arranged at an angle to the lower chord 12 of the hollow truss beam.

[0078] The load transfer path of the cable bridge for oil and gas stations provided in this embodiment is as follows: the cable bridge box 41 is mainly vertically loaded, and the horizontal load caused by factors such as wind can be ignored. The bridge box, the deadweight of the cable and other vertical loads act directly on the cable bridge box support arm 42, and the cable bridge box support arm 42 transfers the load to the cable bridge box support 3 that fixes it. The cable bridge box support arm 42 and the cable bridge box support 3 are mainly borne by bending moments. The cable bridge box support 3 is then transferred to the hollow truss beam 1 in the form of torque and vertical load. The vertical load is converted into the bending moment of the hollow truss beam 1, and the torque is evenly distributed to the upper and lower chords of the hollow truss beam 1. All loads of the hollow truss beam 1 are finally transferred to the circular steel tube structure column 2, where the torque is converted into the bending moment of the column, the bending moment is converted into the shear force and partial bending moment of the column, and the vertical load is converted into the axial force of the column.

[0079] The cable bridge for oil and gas stations provided in this embodiment is simple, lightweight and convenient for on-site installation.

[0080] The manufacturing method of the cable tray for oil and gas station provided in this embodiment is as follows:

[0081] Step 1: Arrange the structural columns 2 according to the cable routing and determine the structural height;

[0082] Step 2: Design the height and specifications of the hollow truss beam 1 according to the column point position;

[0083] Step 3: Verify whether the column position and the height of the hollow truss beam 1 meet the construction requirements. If not, repeat steps 1, 2 and 3 until the construction requirements are met and proceed to step 4. Specifically, the cable tray structure plan is fed back to the power and instrument data submitters to verify the correctness. After the cable tray structure layout and structural form of the entire oil and gas station are determined, the structural plan needs to be fed back to the power and instrument data submitters. Mainly verify whether the starting point and end point, height, and height of the truss beam meet the cable tray box installation requirements and construction requirements. If it is correct, the next step can be carried out. Otherwise, the problematic position should be partially adjusted until the requirements of the power and instrument data submitters are met.

[0084] Step 4: Calculate the height and cross-sectional size of the lower chord 12 of the hollow truss beam, the upper chord 11 of the hollow truss beam and the hollow vertical bar 13 according to the loads of the cables and the bridge box, and determine the position and specification of the hollow vertical bar 13;

[0085] Step 5: Determine the cross-sectional specifications of structural column 2;

[0086] Step 6: Draw the cable tray structure drawing.

[0087] Specifically: (refer to Fig.11 )

[0088] 1. Receive power and instrumentation data. The party that submits the power and instrumentation data will provide the structural design personnel with information including cable tray layout drawings, elevation drawings, and the deadweight loads of cables and bridge boxes, so that the structural design personnel can design the cable tray. Among them, the route of the cable bridge box 41 in the cable tray layout drawing is generally indicated by hatching to distinguish it from the surrounding buildings; the cable tray elevation drawing will give the height and number of floors of the typical section of the cable bridge box 41. At the same time, power and instrumentation will also give special practices for cables to enter the building unit. For example, the cable will be lowered before entering the house and enter the house at a certain inclination angle.

[0089] 2. Arrange the position of the structural column 2, and arrange the position of the structural column 2 according to the cable route in the cable tray layout diagram. According to engineering experience, the spacing of the structural column 2 is generally arranged every 6m. At the same time, when arranging the structural column 2, it is also necessary to avoid the planned structures in the site, such as oil and gas pipelines, street light poles, valve wells, site roads, etc.

[0090] 3. Arrange the hollow truss beam 1. According to the arrangement of the structural column 2, the hollow truss beam 1 is arranged between the two columns. The height of the hollow truss beam 1 is equivalent to the height of the multi-layer cable bridge box 41. When the cable bridge is located in a typical straight section, such as Figure 4 and Figure 5As shown, the hollow truss beam 1 can be processed into a rectangular hollow truss structure; when the cable bridge box 41 needs to be lowered at the entrance, the hollow truss beam 1 can be processed into a parallelogram hollow truss structure, such as Figure 6 and Figure 7 As shown, at this time, the flanges at both ends of the upper and lower chords of the hollow truss beam 1 and the flanges reserved on the columns should also be inclined along with the inclination angle of the chord.

[0091] Regardless of the type of hollow truss beam 1, in order to increase the torsional rigidity of the beam, the cross-sections of the upper and lower chords are square steel tubes. At the same time, the cross-sections of the vertical bars are also square steel tubes, and the cross-sections of the structural columns 2 are round steel tubes.

[0092] To facilitate on-site installation, the upper and lower chords and vertical bars of the hollow truss beam 1 can be welded and assembled in the factory, and flanges can be welded at both ends of the upper and lower chords. If conditions permit, the cable bridge box bracket 42 and the cable bridge box support 3 can also be welded in advance in the factory. If conditions do not permit, they can also be welded at the construction site. A short beam is welded in the factory at the position where the structural column 2 is connected to the upper and lower chords of the truss beam, and a flange is welded on the short beam.

[0093] 4. The cable tray structure plan is fed back to the power and instrument data submitters for verification of correctness. After the cable tray structure layout and structure form of the entire oil and gas station are determined, the structure plan needs to be fed back to the power and instrument data submitters. Mainly verify whether the starting point and end point, height, and truss beam height of the bridge meet the cable tray box installation requirements and construction requirements. If it is correct, the next step can be carried out. Otherwise, the problematic position should be partially adjusted until the requirements of the power and instrument data submitters are met.

[0094] 5. Determine the specifications of the hollow truss beam 1. After the upstream professionals have verified that the cable tray structure layout is correct, they first need to use professional structural design calculation software, such as Midas software, to calculate whether the stress ratio of the component is less than 1 to determine the cross-sectional size of the upper and lower chords and vertical bars of the hollow truss beam 1, and the spacing of the vertical bars. At the same time, it is also necessary to determine the specifications of the flange and the specifications and number of the bolts connecting the flange. The method given in Section 5.9 of the "Standard for Design of High-Rise Structures" (GB 50135-2019) can be used to determine the specifications and number of flange bolts.

[0095] The loads on the cable bridge box 41 and the cables are generally only vertical loads, without horizontal loads. Under the load, the bending moment distribution diagram of the hollow truss beam 1 is as follows: Figure 8 As shown, the axial force distribution diagram is as follows Fig. 9 As shown, the torque distribution diagram is as follows Fig.10As shown in the figure, the length of the line segments in the figure respectively represents the relative magnitude of the bending moment, axial force and torque at different positions of the component. Compared with the bending, shear and tensile bearing capacity, the torsion bearing capacity of the steel beam is much smaller, so it is necessary to focus on calculating whether the torsion bearing capacity of the upper and lower chords meets the requirements. The cable tray of this embodiment has a stronger torsion bearing capacity.

[0096] 6. Determine the specifications of the structural column 2. All loads of the hollow truss beam 1 are finally transferred to the circular steel tube structural column 2, where the torque is converted into the bending moment of the column, the bending moment is converted into the shear force and partial bending moment of the column, and the vertical load is converted into the axial force of the column. Specifically, the circular steel tube structural column 2 is verified to meet the requirements by pressing the bending member. The hollow truss is a bending member as a whole, and the upper and lower chords and vertical bars in the hollow truss are axial force members. Therefore, the circular steel tube structural column 2 is calculated to meet the requirements by pressing the bending member using the "Steel Structure Design Standard" (GB50017-2017) 8.2.4-1 formula.

[0097] 7. After all the information of the whole plan is determined, the drawings for on-site construction are drawn to form the physical object. The main results include: cable tray layout drawing, cable tray elevation drawing, node detail drawing and other drawings used for construction.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cable tray for oil and gas stations, characterized in that: include: Hollow truss beam (1), structural column (2), cable bridge box support (3) and cable bridge box component (4); The hollow truss beam (1) comprises a hollow truss beam lower chord (12), a hollow truss beam upper chord (11) and a hollow vertical bar (13); the hollow truss beam upper chord (11) is arranged above the hollow truss beam lower chord (12); the hollow vertical bar (13) is connected between the hollow truss beam upper chord (11) and the hollow truss beam lower chord (12); the hollow truss beam lower chord (12), the hollow truss beam upper chord (11) and the hollow vertical bar (13) are all arranged as square steel pipes; At least two structural columns (2) are provided, the end of the upper chord (11) of the hollow truss beam is connected to the structural column (2) via a flange, and the end of the lower chord (12) of the hollow truss beam is connected to the structural column (2) via a flange; One end of the cable bridge box support (3) is connected to the lower chord (12) of the hollow truss beam, and the other end is connected to the upper chord (11) of the hollow truss beam; The cable bridge box component (4) is arranged on the side of the hollow truss beam (1) and is connected to the cable bridge box support (3).

2. The cable tray for oil and gas station according to claim 1, characterized in that: The cable bridge box component (4) comprises a cable bridge box (41) and a cable bridge box supporting arm (42); The cable bridge box support arm (42) is connected to the cable bridge box support (3); The cable bridge box (41) is connected above the cable bridge box supporting arm (42).

3. The cable tray for oil and gas station according to claim 2 is characterized in that: A plurality of the cable bridge box supporting arms (42) are arranged at intervals along the length direction of the cable bridge box (41).

4. The cable tray for oil and gas station according to claim 1, characterized in that: A plurality of hollow-web vertical rods (13) are arranged at intervals along the length direction of the hollow-web truss beam upper chord (11).

5. The cable tray for oil and gas station according to claim 1, characterized in that: It also includes a first flange (5) and a second flange (6); The first flange (5) is connected to the end of the upper chord (11) of the hollow truss beam; The second flange (6) is connected to the structural column (2); The first flange (5) is connected to the second flange (6).

6. The cable tray for oil and gas station according to claim 5, characterized in that: The first flange (5) and the second flange (6) are connected by bolts.

7. The cable tray for oil and gas station according to claim 1, characterized in that: It also includes a third flange (7) and a fourth flange (8); The third flange (7) is connected to the end of the lower chord (12) of the hollow truss beam; The fourth flange (8) is connected to the structural column (2); The third flange (7) is connected to the fourth flange (8).

8. The cable tray for oil and gas station according to claim 7, characterized in that: The third flange (7) and the fourth flange (8) are connected by bolts.

9. The cable tray for oil and gas station according to claim 1, characterized in that: The structural column (2) is configured as a round steel pipe.

10. A method for manufacturing a cable tray for an oil and gas station according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Arrange the structural columns according to the cable routing (2) and determine the structural height; Step 2: Design the height and specifications of the hollow truss beam (1) according to the column point position; Step 3: Check whether the column position and the height of the hollow truss beam (1) meet the construction requirements. If not, repeat steps 1, 2 and 3 until the construction requirements are met, and then proceed to step 4. Step 4: Calculate the height and cross-sectional size of the lower chord (12) of the hollow truss beam, the upper chord (11) of the hollow truss beam, and the hollow vertical bar (13) according to the loads of the cables and the bridge box, and determine the position and specification of the hollow vertical bar (13); Step 5: Determine the cross-sectional specifications of the structural column (2); Step 6: Draw the cable tray structure drawing.

Images