An exhibition hall in-gutter electromechanical comprehensive pipeline assembly type construction method

Abstract

The application is a kind of exhibition hall ground ditch inside electromechanical comprehensive pipeline assembly type construction method, which comprises the following steps: electromechanical comprehensive pipeline module division, main pipe ditch support design, branch pipe ditch support design, factory prefabrication, factory or ditch edge assembly, segmented hoisting and segmented installation, positioning adjustment support fixing, alignment connection between alignment sections, fire hydrant box and comprehensive box installation. The method is beneficial to the rapid and reasonable construction of the exhibition hall ground ditch inside electromechanical comprehensive pipeline, the designed pipe ditch support realizes the purpose of factory prefabrication and on-site assembly type construction, and solves the technical problem that the construction of the electromechanical comprehensive pipeline in the exhibition hall ground ditch is relatively difficult due to the narrow space. In addition, the fire hydrant box in the method is newly designed in the principle of convenient use, and can be directly pulled up when needed, which is simple to operate and convenient to use. Practice proves that the method is safe and reliable, convenient to construct, and good in appearance, and achieves the expected index and target.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to the construction of exhibition hall trenches, specifically a prefabricated construction method based on electromechanical integrated pipelines in exhibition hall trenches. Background Technology

[0002] Exhibition hall-type buildings have emerged across the country. As a high-speed information channel in exhibition halls, exhibition hall trenches play an important role in connecting equipment rooms and booths. Digital technologies such as ground projection, electronic sand table, interactive display window, interactive touch screen, interactive touch table, interactive flipbook, interactive signature and photo, holographic imaging, wall projection, virtual roaming, panoramic screen, dome screen, and fog screen all rely on the transmission of information through exhibition hall trenches.

[0003] Exhibition hall trenches are channels used to lay electrical, information, water, and compressed air pipelines for exhibition purposes. They include main trenches and branch trenches. Due to the need to transport exhibits and increase the ground's transport capacity, exhibition hall trenches are generally relatively narrow. The construction of electromechanical pipelines within exhibition hall trenches is extremely difficult, with high construction difficulty and a long construction period, seriously affecting the overall construction progress. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a prefabricated construction method for integrated electromechanical pipelines in exhibition hall trenches. This method designs matching prefabricated trench supports and fire hydrant boxes based on the characteristics of the trenches, achieving rapid construction through factory prefabrication and on-site assembly. Simultaneously, the trench supports are rationally installed according to the characteristics of the trenches, thereby quickly and efficiently completing the construction of integrated electromechanical pipelines in the exhibition hall trenches. The fire hydrant boxes are newly designed with a user-friendly structure, making operation simple and convenient.

[0005] This invention is achieved through the following technical solution:

[0006] A prefabricated construction method for integrated electromechanical pipelines in exhibition hall trenches includes the following steps:

[0007] 1) Division of electromechanical integrated pipeline modules

[0008] The exhibition hall is equipped with main pipe trenches and branch pipe trenches. Both main pipe trenches and branch pipe trenches are covered with trench covers. The trench covers include fixed covers and movable maintenance covers. A section within the movable maintenance cover section is designated as the matching section. The matching section is less than 3m. The matching sections are a hoisting module. The hoisting module includes a support on each side of the matching section.

[0009] 2) Design of main trench support

[0010] The main channel trench is equipped with a drainage ditch on the side of the bottom surface of the trench, and the main channel trench support is installed at intervals along the length of the main channel trench on the bottom surface of the trench, excluding the drainage ditch.

[0011] The main trench support is a detachable assembly of bolted connections. It includes two main uprights, one of which has multiple sidewall anchor plates fixed at intervals, with anchor bolts passing through these plates. Both main uprights have trench bottom anchor plates fixed to their bottom ends, also with anchor bolts passing through them. Five layers of main crossarms are arranged between the two main uprights from bottom to top. Each main upright is detachably connected to each main crossarm via connecting bolts. The bolt holes on the main uprights and crossarms are long bolt holes extending along their respective lengths. Each main crossarm has a circular hole for fixing pipe clamps, with the end of the pipe clamp connected and fixed to the circular hole on the main crossarm via bolts.

[0012] During installation, one main upright is set against one side wall and fixed to the wall using side wall anchoring plates and anchor bolts. The other main upright is set along the edge of the drainage ditch, leaving a gap between it and the other side wall. The bottom ends of both main uprights are fixed to the bottom of the ditch using bottom anchoring plates and anchor bolts. Among the five layers of main crossarms between the two main uprights, the distance from the bottom of the lowest main crossarm to the bottom of the ditch is not less than 100mm, and the distance from the bottom line of each layer of main crossarms to the insulated surface of the pipeline is not less than 50mm. From bottom to top, the bottom main crossarm supports a DN150 fire pipe, the second main crossarm supports a DN80 compressed air pipe on the wall side and a DN80 water supply pipe on the drainage ditch side, the third main crossarm supports a low-voltage cable tray, and the fourth main crossarm supports a high-voltage cable tray. Each pipe on the main crossarm is fixed to the corresponding layer of the main crossarm using pipe clamps.

[0013] 3) Design of branch trench supports

[0014] Branch trenches are narrower than main trenches, and do not have drainage ditches but are equipped with drainage pipes. Branch trench supports are installed at intervals on the bottom surface of the trench along the length of the branch trench.

[0015] The branch trench support is a detachable assembly of bolted connections. It includes two uprights, each with multiple sidewall anchor plates fixed at intervals, and anchor bolts passing through these plates. The bottom of each upright is fixed with a trench bottom anchor plate, also with anchor bolts. Five layers of crossarms are arranged between the two uprights from bottom to top. Each upright is detachably connected to each crossarm via bolts. The bolt holes on the uprights and crossarms are long bolt holes extending along their respective lengths. Each crossarm has a circular hole for fixing pipe clamps, and the end of the pipe clamp is fixed to the circular hole on the crossarm via bolts.

[0016] During installation, the branch trench supports are installed with two uprights tightly against the walls on both sides, and fixed to the walls via side wall anchoring plates and anchor bolts. The bottom ends of both uprights are fixed to the trench bottom via trench bottom anchoring plates and anchor bolts. Among the five layers of crossbeams between the two uprights, the lowest crossbeam must be at least 100mm from the trench bottom, and the bottom line of each crossbeam must be at least 50mm from the insulated surface of the pipeline. From bottom to top, the lowest crossbeam supports a DN65 fire hose on one side and a DN25 compressed air hose on the other, with the DN65 fire hose positioned closer to the wall. The DN25 compressed air pipe is arranged away from its corresponding wall side and at a distance of not less than 250mm from the wall. On the second-layer crossarm, a DN32 water supply pipe is supported on one side and a De110 drainage pipe is supported on the other side. The DN32 water supply pipe is arranged close to its corresponding wall side, and the De110 drainage pipe is arranged away from its corresponding wall side and at a distance of not less than 250mm from the wall. The third-layer crossarm supports the installation of low-voltage cable trays, and the fourth-layer crossarm supports the installation of high-voltage cable trays. Each pipe on the crossarm is fixed to the main crossarm of the corresponding layer by pipe clamps.

[0017] 4) Factory prefabrication

[0018] The components of the designed main pipe trench support and branch pipe trench support are prefabricated in the factory, and the pipelines are also prefabricated in the factory.

[0019] 5) Assembly in the factory or along the ditch

[0020] Prefabricated main pipe trench supports and branch pipe trench supports are assembled in the factory, stacked and transported to the construction site, or the components of prefabricated main pipe trench supports and branch pipe trench supports are transported to the construction site in the form of individual parts and assembled at the trench. For pipelines and cable trays, they are prefabricated in the factory and assembled at the trench.

[0021] 6) Segmented hoisting and installation

[0022] Depending on the segmentation, one or more cranes are used to lift and position the sections, and then the sections are fixed and installed.

[0023] 7) Positioning and adjusting bracket fixation

[0024] When the crane is about to be lowered into place, chain hoists are used in conjunction with the crane at both ends of the lifting module to position it. The crane plays a lifting role, while the chain hoists play a left and right position control role. After positioning and alignment, the bracket is fixed.

[0025] 8) Inter-section connection

[0026] The alignment is performed between the two supports, starting from the lowest layer of pipeline and proceeding layer by layer from bottom to top. When aligning layers, for welded or bonded metal pipes, it is not necessary to release the pipe clamps on both supports and directly perform the alignment connection. For pipes with high aesthetic requirements or mechanical connections, the pipe clamps on both supports must be released before alignment to absorb minor deviations during pipeline alignment.

[0027] 9) Installation of fire hydrant boxes and integrated boxes

[0028] The fire hydrant boxes are buried underground and connected to the fire pipes in the pipe trench.

[0029] The integrated control box is a water and electricity integrated box, and is connected to the compressed air pipe and water pipe in the pipe trench.

[0030] Furthermore, in the main pipe trench support and branch pipe trench support, the width of the long bolt holes on the main uprights, main crossarms, support uprights, and support crossarms is the diameter of the connecting bolt plus 2mm, and the length of the long bolt holes is twice the diameter of the connecting bolt plus 2mm.

[0031] Furthermore, the main uprights and support uprights are all made of No. 5 channel steel, the main crossbeams and support crossbeams are all made of 50×4mm angle steel, the bottom anchoring steel plate is made of 10mm thick steel plate, and the side wall anchoring steel plate is made of 8mm thick steel plate.

[0032] Furthermore, the fire hydrant box includes an outer frame and an inner box. The top of the inner box is open. The inner box is set inside the outer frame and supported on the bottom frame of the outer frame. A flange swivel joint is installed between one side of the outer frame and the corresponding side of the inner box wall. One end of the flange swivel joint is connected to a water outlet pipe through an elbow, and the other end of the flange swivel joint is connected to a fire pipe in the pipe trench through an elbow. The side of the flange swivel joint connected to the water outlet pipe is fixedly connected to the box wall of the inner box, and the other side of the flange swivel joint connected to the fire pipe is fixedly connected to the bottom frame of the outer frame. The outlet end of the water outlet pipe passes through the box wall of the inner box and extends into the inner box.

[0033] Furthermore, gas springs are respectively installed between the inner box wall on both sides of the flange rotary joint and the corresponding two sides of the outer frame. One end of the two gas springs is hinged to the two sides of the inner box wall, and the hinge point is located at the middle position of the bottom of the two sides of the inner box wall. The other end of the two gas springs is hinged to the two sides of the outer frame, and the hinge point is located at the outer side of the two ends of the flange rotary joint.

[0034] Furthermore, the fire hydrant box also includes a support frame and a load-bearing cover plate. The vertical cross-sectional shape of the support frame is Z-shaped, and the support frame is fixed to the top of the outer frame. The load-bearing cover plate is supported and installed inside the support frame, and the load-bearing cover plate has a lifting groove hole.

[0035] Furthermore, the four side walls of the outer frame are sealed and fixed with thin steel plates.

[0036] Furthermore, the rotating body on one side of the flange rotary joint is connected and fixed to the box wall of the inner box through a connecting angle bracket. The connecting angle bracket includes two vertically fixed connecting plates, one of which is connected and fixed to the flange on one side of the flange rotary joint, and the other connecting plate is connected and fixed to the box wall of the inner box.

[0037] Furthermore, the rotating body on the other side of the flange rotary joint is connected and fixed to the bottom frame of the outer frame through a connecting plate. The connecting plate includes a fixing plate and a fixing strap. The fixing plate is connected and fixed to the bottom frame of the outer frame, and the fixing strap is wrapped around the rotating body of the flange rotary joint. Both ends of the fixing strap are connected and fixed to the fixing plate respectively.

[0038] Furthermore, the installation and construction method for fire hydrant boxes includes the following steps:

[0039] 1) Design of adjustable positioning device

[0040] The adjustable positioning device includes an angle steel leveling bar, with adjusting nuts fixed at both ends of the angle steel leveling bar. Each adjusting nut is threaded with a T-shaped round steel leveling screw rod that runs through the top and bottom of the angle steel leveling bar.

[0041] 2) Leveling of fire hydrant boxes

[0042] Place two sets of parallel adjustable positioning devices on the top of the fire hydrant box. Adjust the relative height between the angle steel leveling rod and the water-stabilized layer ground to the specified height by rotating the T-shaped round steel leveling screw rod. Use pliers to clamp and fix the angle steel leveling rod in each set of adjustable positioning devices to the support frame on the fire hydrant box.

[0043] 3) Fixing of fire hydrant boxes

[0044] After the fire hydrant box is leveled, it is fixedly connected to the water-stabilized layer by round steel fasteners. The round steel fasteners are made of two round steel sections welded together. The two round steel sections are set in an L-shape. The vertical round steel section is anchored in the water-stabilized layer, and the horizontal round steel section is welded and fixed to the fire hydrant box.

[0045] 4) The fire hydrant box is fixed by pouring concrete on the ground to complete the installation.

[0046] This invention facilitates the rapid and efficient construction of integrated electromechanical pipelines within exhibition hall trenches. The designed trench supports achieve prefabrication in the factory and assembly on-site, solving the technical challenge of constructing integrated electromechanical pipelines within the confined space of exhibition hall trenches. This also improves production efficiency and shortens the construction period. Furthermore, the fire hydrant boxes in this invention feature a novel structural design for ease of use; they can be easily pulled up when needed, making operation simple and convenient. Practical experience has proven that this invention is safe, reliable, easy to construct, and aesthetically pleasing, achieving the expected indicators and objectives. Attached Figure Description

[0047] The accompanying drawings, which are provided to further illustrate the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0048] Figure 1 This is a schematic diagram of the main channel and main channel support structure in this invention.

[0049] Figure 2 This is a schematic diagram of the branch trench and branch trench support structure in this invention.

[0050] Figure 3 This is a schematic diagram showing the connection between the upright and the crossarm in this invention.

[0051] Figure 4 This is a top view of the fire hydrant box in this invention.

[0052] Figure 5 for Figure 4 A bottom view from the center (A) direction.

[0053] Figure 6 This is a schematic diagram showing the fire hydrant box being rotated and erected during use in this invention.

[0054] Figure 7 This is a schematic diagram of the segmented installation bracket being hoisted and installed in sections by a crane in this invention.

[0055] Figure 8 This is a schematic diagram of the installation of the support frame and load-bearing cover plate on the fire hydrant box in this invention.

[0056] Figure 9 This is a schematic diagram of the connection of the adjustable positioning device during the installation of the fire hydrant box in this invention.

[0057] Figure 10 This is a schematic diagram of the connection of the round steel fixing parts during the installation of the fire hydrant box in this invention.

[0058] In the diagram: 1-Main pipe trench, 2-Branch pipe trench, 3-Drainage ditch, 4-Main pipe trench support, 5-Branch pipe trench support, 6-Main upright, 7-Main crossarm, 8-Upright support, 9-Crossarm support, 10-Side wall anchoring steel plate, 11-Ditch bottom anchoring steel plate, 12-Anchoring bolt, 13-Pipe clamp, 14-DN150 fire pipe, 15-DN80 compressed air pipe, 16-DN80 water supply pipe, 17-Weak current cable tray, 18-Strong current cable tray, 19-DN65 fire pipe, 20-D N25 compressed air pipe, 21-DN32 water supply pipe, 22-De110 drainage pipe, 23-outer frame, 24-inner box, 25-flange swivel joint, 26-water outlet pipe, 27-connecting angle bracket, 28-fixing plate, 29-fixing strap, 30-gas spring, 31-support frame, 32-load-bearing cover plate, 33-lifting groove hole, 34-angle steel leveling bar, 35-adjusting nut, 36-T-shaped round steel leveling screw rod, 37-water-stabilized layer, 38-round steel fastener. Detailed Implementation

[0059] To enable those skilled in the art to better understand the present invention, the present invention will be further described clearly and completely below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0060] In the description of this invention, it should be understood that the terms "left", "right", "up", "down", 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 invention and simplifying the description, 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 invention.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] Taking a certain project as an example, the main pipe trench 1 of the exhibition hall has a net width of 960mm and a net height of 1390mm. A drainage ditch 3 with a depth of 100mm is provided on the side of the trench. The branch pipe trench 2 has a net width of 560mm and a net height of 1200mm. The bottom elevation difference between the main and branch pipe trenches 1 and 2 is 294mm. The connecting well is 650*650mm, with a net height of 1200mm and a diameter of 1250×1250mm.

[0063] Regarding the exhibition hall trench in the aforementioned project, this embodiment provides a prefabricated construction method for electromechanical integrated pipelines within the exhibition hall trench, including the following steps:

[0064] 1) Division of electromechanical integrated pipeline modules

[0065] The exhibition hall has a main pipe trench 1 and a branch pipe trench 2. Both main pipe trench 1 and branch pipe trench 2 are equipped with trench covers, including fixed covers and movable maintenance covers. In areas with doors where vehicles need to travel, the trench covers along these routes are fixed; otherwise, they are movable maintenance covers (all on straight sections). A section within the movable maintenance cover area is designated as a connecting section, less than 3 meters long. Between connecting sections is a single hoisting module, including a support bracket on each side of the connecting section. Ideally, each hoisting module should have two branch trenches. During the detailed design phase, the design will be based on the availability of electromechanical pipeline materials, module hoisting requirements, and the overall pipeline trench layout.

[0066] 2) Design of main channel support 4

[0067] like Figure 1 As shown, the main trench support 4 is a detachable assembly of bolted connections. The main trench support 4 includes two main uprights 6 made of #5 channel steel. Multiple sidewall anchor plates 10 made of 8mm thick steel plates are fixed at intervals on the left main upright 6, and anchor bolts 12 pass through the sidewall anchor plates 10. The bottom ends of both main uprights 6 are fixed with trench bottom anchor plates 11 made of 10mm thick steel plates, and anchor bolts 12 pass through the trench bottom anchor plates 11. Five layers of main crossbeams 7 are arranged from bottom to top between the two main uprights 6. The main crossbeams 7 are made of 50×4mm angle steel. The two main uprights 6 are detachably connected to each layer of main crossbeams 7 by connecting bolts with a diameter of 10mm. The bolt holes on the main uprights 6 and main crossbeams 7 are long bolt holes arranged along their respective lengths, with a length of 24mm and a width of 12mm. Figure 3 As shown; each main crossarm 7 has a round hole for fixing the pipe clamp 13, and the end of the pipe clamp 13 is connected and fixed to the round hole on the main crossarm 7 by bolts.

[0068] The main channel support 4 is installed at intervals along the length of the main channel 1 on the bottom surface of the channel, excluding the drainage ditch 3, with an interval of 3m. During installation, the main support 4 is set with the left main column 6 close to the left wall and fixed to the wall by the side wall anchoring steel plate 10 and anchoring bolts 12. The right main column 6 is set along the edge of the drainage ditch 3 and leaves a gap of at least the width of the drainage ditch 3 between it and the other side wall. The bottom ends of both main columns 6 are fixed to the bottom surface of the ditch by the bottom anchoring steel plate 11 and anchoring bolts 12. Among the five layers of main crossbeams 7 between the two main columns 6, the bottommost main crossbeam 7 is at a considerable distance from the bottom surface of the ditch. For each layer of main crossarm 7, the distance between the bottom line and the insulated surface of the pipeline is not less than 50mm. From bottom to top, the bottom layer of main crossarm 7 supports and installs a DN150 fire pipe 14. The second layer of main crossarm 7 supports and installs a DN80 compressed air pipe 15 on the left and a DN80 water supply pipe 16 on the right. The third layer of main crossarm 7 supports and installs a 400*100mm low-voltage cable tray 17 on the right side. The fourth layer of main crossarm 7 supports and installs a 500*150mm high-voltage cable tray 18 on the right side. Each pipe on the main crossarm 7 is fixed to the corresponding layer of main crossarm 7 by pipe clamps 13. If pipelines intersect, or if there are bends and passageways between pipelines on different levels, such as in this project, the lowest level DN150 fire pipe 14 can be directly extended to the left and right by a tee. The next lower level has two pipes: one is a DN80 water supply pipe 16, and the other is a DN80 compressed air pipe 15. The DN80 water supply pipe 16 is placed on the side near the branch trench for easy pipeline extension. The DN80 compressed air pipe 15 branch is small and needs to be routed from between the DN80 water supply pipe 16 and the low-voltage cable tray 17 back to the branch trench.

[0069] 3) Design of branch trench support 5

[0070] like Figure 2 As shown, the branch trench support 5 is a detachable assembly of bolted connections. The branch trench support 5 includes two uprights 8 made of #5 channel steel. Multiple sidewall anchor plates 10, made of 8mm thick steel plates, are fixed at intervals on each of the two uprights 8. Anchor bolts 12 pass through the sidewall anchor plates 10. At the bottom of each of the two uprights 8, a trench bottom anchor plate 11, made of 10mm thick steel plate, is fixed. Anchor bolts 12 pass through the trench bottom anchor plate 11. Five layers of crossbeams 9 are arranged from bottom to top between the two uprights 8. The crossbeams 9 are made of 50×4mm angle steel. The two uprights 8 are detachably connected to each layer of crossbeams 9 by connecting bolts with a diameter of 10mm. The bolt holes on the uprights 8 and crossbeams 9 are long bolt holes arranged along their respective lengths, with a length of 24mm and a width of 12mm. Figure 3As shown; each layer of crossbeam 9 has a round hole for fixing the pipe clamp 13, and the end of the pipe clamp 13 is connected and fixed to the round hole on the crossbeam 9 by bolts.

[0071] Branch trench 2 is narrower than main trench 1 and does not have a drainage ditch, but a drainage pipe is installed. Branch trench supports 5 are installed at intervals of 3m along the length of branch trench 2 on the bottom surface of the trench. During installation, two support rods 8 are respectively set close to the left and right side walls and fixed to the walls by side wall anchoring steel plates 10 and anchoring bolts 12. The bottom ends of the two support rods 8 are fixed to the bottom surface of the trench by trench bottom anchoring steel plates 11 and anchoring bolts 12. Among the four layers of crossbeams 9 between the two support rods 8, the distance from the bottom crossbeam 9 to the bottom surface of the trench is not less than 100mm, and the distance from the bottom line of each crossbeam 9 to the insulated surface of the pipeline is not less than 50mm. From bottom to top, the bottom crossbeam... On the crossarm 9, a DN65 fire pipe 19 is supported on the left and a DN25 compressed air pipe is supported on the right, with the DN25 compressed air pipe 250mm away from the right wall. On the second-layer crossarm 9, a DN32 water supply pipe is supported on the left and a De110 drainage pipe is supported on the right, with the De110 drainage pipe 250mm away from the right wall. On the third-layer crossarm 9, a 200*100mm low-voltage cable tray 17 is supported on the left side, and on the fourth-layer crossarm 9, a 250*150mm high-voltage cable tray 18 is supported on the left side. Each pipe on the crossarm 9 is fixed to the corresponding main crossarm 7 using pipe clamps 13.

[0072] For steps 2) and 3) above, in practical applications, the sizes of the main and support uprights 6 and 8 can generally be selected with reference to standard drawings. For larger pipes, they can be calculated as eccentrically compressed components. The thickness of the bottom anchoring steel plate 11 is generally 10mm. When the maximum pipe diameter exceeds 400mm, it is determined by the support return force bending calculation based on the load size. The thickness of the side wall anchoring steel plate 10 is generally 8mm. When the maximum pipe diameter exceeds 400mm, it is determined by the bending resistance calculation based on the load size. The width of the main and support crossarms 7 and 9 is determined according to the detailed design requirements of the upright positions. Generally, the two uprights are placed with the minimum spacing for the electromechanical pipelines. The distance between the uprights not against the wall and the inner wall of the trench should not be less than 300mm to facilitate later maintenance and passage. The uprights and crossarms are connected by staggered overlap, that is: the vertical surface of the angle steel used as the crossarm is attached to the bottom surface of the channel steel used as the upright and fixed by connecting bolts. Figure 3 As shown, this allows for reliable installation of electrical and mechanical pipelines closer to the poles, thus saving valuable space.

[0073] 4) Factory prefabrication

[0074] The components of the designed main pipe support 4 and branch pipe support 5 are prefabricated in the factory. At the same time, according to the division of the electromechanical integrated pipeline module, the various professional pipelines of electromechanical engineering are prefabricated in the factory.

[0075] 5) Assembly in the factory or along the ditch

[0076] The prefabricated main pipe support 4 and branch pipe support 5 are assembled in the factory, stacked and transported to the construction site, or the components of the prefabricated main pipe support 4 and branch pipe support 5 are transported to the construction site in the form of individual parts and assembled at the trench. For pipelines and cable trays, due to the stringent requirements on the construction site and road transportation conditions, it is advisable to prefabricate them in the factory and assemble them at the trench.

[0077] 6) Segmented hoisting and installation

[0078] Depending on the segmentation, one or more cranes are used to lift and position the sections. After positioning, the sections are secured and installed. One crane can lift 6 meters at a time, while two cranes can lift 15 meters. Figure 7 As shown.

[0079] 7) Positioning and adjusting bracket fixation

[0080] When the crane is about to be lowered into place, use chain hoists and the crane together to position the module at both ends. The crane will lift the module, and the chain hoists will control its left and right position. After positioning and alignment, fix the bracket. For positioning and adjustment, verify the actual dimensions of the two branch trenches of the module section, especially the relative position of the two branch trenches. The error should not exceed 10mm. The interface size between the main trench and the branch trench is adjusted by the long elliptical hole. If necessary, it can be adjusted by using the rivet plate on the wall and then shimming it.

[0081] 8) Inter-section connection

[0082] The alignment is carried out between the two supports. Due to the relatively narrow space in the exhibition hall trench, the alignment starts from the lowest layer of pipelines and is carried out layer by layer from bottom to top. When aligning the layers, for metal pipe welding and pipe bonding, it is not necessary to release the pipe clamps on both sides of the support and the alignment can be carried out directly. For those with high visual requirements and mechanical connections, the pipe clamps on both sides of the support must be released before alignment to absorb minor deviations during pipeline alignment.

[0083] 9) Installation of fire hydrant boxes and integrated boxes

[0084] The fire hydrant boxes are buried underground and connected to the fire pipes in the trench; the integrated boxes are water and electricity integrated boxes and connected to the compressed air pipes and water pipes in the trench.

[0085] For fire hydrant boxes, based on the principle of ease of use, this embodiment uses a specially designed fire hydrant box, the structure of which is as follows: Figure 4 and Figure 5 As shown, it can be rotated and used upright, as... Figure 6As shown; during installation, the fire hydrant box is installed in a specific well and embedded in the fixed pipe trench cover plate, and the installation is completed in one go with the exhibition hall floor construction.

[0086] The specific structure of the fire hydrant box is as follows:

[0087] The fire hydrant box includes an outer frame 23, an inner box 24, a supporting frame 31, and a load-bearing cover plate 32. The four side walls of the outer frame 23 are enclosed and fixed with thin steel plates, which act as templates to effectively prevent concrete from entering the fire hydrant box during concrete pouring. This allows the fire hydrant box to be fixed and installed in one go during the ground concrete pouring. The bottom of the outer frame 23 is open, facilitating connection with fire pipes in the pipe trench. The top of the inner casing 24 is open. The inner casing 24 is set inside the outer frame 23 and supported on the bottom frame of the outer frame 23. A flange swivel joint 25 is installed between one side of the frame inside the outer frame 23 and the corresponding side wall of the inner casing 24. One end of the flange swivel joint 25 is connected to a water outlet pipe 26 via an elbow, and the other end of the flange swivel joint 25 is connected to a fire pipe in the pipe trench via an elbow. The side of the flange swivel joint 25 connected to the water outlet pipe 26 is fixedly connected to the wall of the inner casing 24, and the other side of the flange swivel joint 25 connected to the fire pipe is fixedly connected to the bottom frame of the outer frame 23. The outlet end of the water outlet pipe 26 passes through the wall of the inner casing 24 and extends into the inner casing 24. The side of the flange swivel joint 25 is connected to the inner casing 24 via a connecting bracket 27. The enclosure wall of the housing 24 is connected and fixed. The connecting bracket 27 includes two vertically fixed connecting plates. One connecting plate is connected and fixed to the flange on one side of the rotating body of the flange rotary joint 25, and the other connecting plate is connected and fixed to the enclosure wall of the inner housing 24. The connecting bracket 27 is made of 5mm thick steel plate bent at a 90-degree angle. The other side of the rotating body of the flange rotary joint 25 is connected and fixed to the bottom frame of the outer frame 23 through a connecting clamp plate. The connecting clamp plate includes a fixing plate 28 and a fixing strap 29. The fixing plate 28 is connected and fixed to the bottom frame of the outer frame 23, and the fixing strap 29 is wrapped around the rotating body of the flange rotary joint 25. The two ends of the fixing strap 29 are respectively connected and fixed to the fixing plate 28. The fixing plate 28 is made of 10mm thick steel plate, and the fixing strap 29 is made of 30mm thick flat steel strip. Gas springs 30 are respectively installed between the inner box 24 on both sides of the flange rotary joint 25 and the corresponding side frames of the outer frame 23. One end of each gas spring 30 is hinged to the side walls of the inner box 24, with the hinge point located at the middle of the bottom of the side walls. The other end of each gas spring 30 is hinged to the side frames of the outer frame 23, with the hinge point located outside the interfaces at both ends of the flange rotary joint 25. A support frame 31 is fixed to the top of the outer frame 23. The vertical cross-section of the support frame 31 is Z-shaped. A load-bearing cover plate 32 is installed inside the support frame 31. The load-bearing cover plate 32 has grooves 33 for lifting. Figure 8As shown.

[0088] The fire hydrant box installation method includes the following steps:

[0089] 1) Design of adjustable positioning device

[0090] The adjustable positioning device includes an angle steel leveling rod 34, with adjusting nuts 35 fixed at both ends of the angle steel leveling rod 34. Each adjusting nut 35 is threaded with a T-shaped round steel leveling screw rod 36 that runs through the top and bottom of the angle steel leveling rod 34. Figure 9 As shown;

[0091] 2) Leveling of fire hydrant boxes

[0092] Two sets of parallel adjustable positioning devices are placed on top of the fire hydrant box. The relative height between the angle steel leveling rod 34 and the water-stabilized layer 37 is adjusted to the specified height by rotating the T-shaped round steel leveling screw rod 36. The angle steel leveling rod 34 in each set of adjustable positioning devices is clamped and fixed to the support frame 31 on the fire hydrant box using bolt cutters. Figure 9 As shown;

[0093] 3) Fixing of fire hydrant boxes

[0094] After the fire hydrant box is leveled, it is fixedly connected to the water-stabilized layer 37 via round steel fasteners 38. The round steel fasteners 38 are made of two round steel sections welded together, arranged in an L-shape. The vertical round steel section is anchored within the water-stabilized layer 37, while the horizontal round steel section is welded and fixed to the support frame 31 of the fire hydrant box. Figure 10 As shown;

[0095] 4) The fire hydrant box is fixed by pouring concrete on the ground to complete the installation.

[0096] The integrated box is a water and electricity integrated box, with water and electricity in two separate boxes placed in one well. The power distribution part is a waterproof distribution box with waterproof industrial quick connectors on the outside for plug-and-play use. The water and compressed air distribution boxes have quick connectors for tap water and compressed air, and are equipped with floor drains.

[0097] The above-described embodiments are merely one implementation of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches, characterized in that, Includes the following steps: 1) Division of electromechanical integrated pipeline modules The exhibition hall is equipped with main pipe trenches and branch pipe trenches. Both main pipe trenches and branch pipe trenches are covered with trench covers. The trench covers include fixed covers and movable maintenance covers. A section within the movable maintenance cover section is designated as the matching section. The matching section is less than 3m. The matching sections are a hoisting module. The hoisting module includes a support set on each side of the matching section. 2) Design of main trench support A drainage ditch is provided on the side of the bottom surface of the main trench, and the main trench support is installed at intervals along the length of the main trench on the bottom surface of the trench, excluding the drainage ditch. The main trench support is a detachable assembly of bolted connections. The main trench support includes two main uprights. Multiple sidewall anchor plates are fixed at intervals on one main upright, and anchor bolts pass through these sidewall anchor plates. Both main uprights have trench bottom anchor plates fixed to their bottom ends, and anchor bolts pass through these trench bottom anchor plates. Five layers of main crossarms are arranged between the two main uprights from bottom to top. Each main upright is detachably connected to each layer of main crossarms via connecting bolts. The bolt holes on the main uprights and main crossarms are long bolt holes arranged along their respective lengths. Each layer of main crossarms has round holes for fixing pipe clamps, and the ends of the pipe clamps are fixed to the round holes on the main crossarms via bolts. During installation, one main upright is set against one side wall and fixed to the wall using side wall anchoring plates and anchor bolts. The other main upright is set along the edge of the drainage ditch, leaving a gap between it and the other side wall. The bottom ends of both main uprights are fixed to the bottom of the ditch using bottom anchoring plates and anchor bolts. Among the five layers of main crossarms between the two main uprights, the distance from the bottom of the lowest main crossarm to the bottom of the ditch is not less than 100mm, and the distance from the bottom line of each layer of main crossarms to the insulated surface of the pipeline is not less than 50mm. From bottom to top, the bottom main crossarm supports a DN150 fire pipe, the second main crossarm supports a DN80 compressed air pipe on the wall side and a DN80 water supply pipe on the drainage ditch side, the third main crossarm supports a low-voltage cable tray, and the fourth main crossarm supports a high-voltage cable tray. Each pipe on the main crossarm is fixed to the corresponding layer of main crossarm using pipe clamps. 3) Design of branch trench supports Branch trenches are narrower than main trenches and do not have drainage ditches, but drainage pipes are installed. Branch trench supports are installed at intervals on the bottom surface of the trench along the length of the branch trench. The branch trench support is a detachable assembly of bolted connections. The support includes two uprights, each with multiple sidewall anchor plates fixed at intervals, and anchor bolts passing through these plates. The bottom of each upright is fixed with a trench bottom anchor plate, also with anchor bolts. Five layers of crossarms are arranged between the two uprights from bottom to top. Each upright is detachably connected to each crossarm via bolts. The bolt holes on the uprights and crossarms are long bolt holes extending along their respective lengths. Each crossarm has a circular hole for fixing pipe clamps, and the end of the pipe clamp is fixed to the circular hole on the crossarm via bolts. During installation, the branch trench supports are installed with two uprights tightly against the walls on both sides, and fixed to the walls via side wall anchoring plates and anchor bolts. The bottom ends of both uprights are fixed to the trench bottom via trench bottom anchoring plates and anchor bolts. Among the five layers of crossbeams between the two uprights, the lowest crossbeam must be at least 100mm from the trench bottom, and the bottom line of each crossbeam must be at least 50mm from the insulated surface of the pipeline. From bottom to top, the lowest crossbeam supports a DN65 fire hose on one side and a DN25 compressed air hose on the other, with the DN65 fire hose positioned closer to the wall. The DN25 compressed air pipe is arranged away from its corresponding wall side and at a distance of not less than 250mm from the wall. On the second-layer crossarm, a DN32 water supply pipe is supported on one side and a De110 drainage pipe is supported on the other side. The DN32 water supply pipe is arranged close to its corresponding wall side, and the De110 drainage pipe is arranged away from its corresponding wall side and at a distance of not less than 250mm from the wall. The third-layer crossarm supports the installation of low-voltage cable trays, and the fourth-layer crossarm supports the installation of high-voltage cable trays. Each pipe on the crossarm is fixed to the corresponding layer's main crossarm using pipe clamps. 4) Factory prefabrication The components of the designed main pipe trench support and branch pipe trench support are prefabricated in the factory, and the pipelines are also prefabricated in the factory. 5) Assembly in the factory or along the ditch Prefabricated main pipe trench supports and branch pipe trench supports are assembled in the factory, stacked and transported to the construction site, or the components of prefabricated main pipe trench supports and branch pipe trench supports are transported to the construction site in the form of individual parts and assembled at the trench side; for each pipeline and cable tray, they are prefabricated in the factory and assembled at the trench side. 6) Segmented hoisting and installation Depending on the segmentation, one or more cranes are selected to lift and position the sections, and then the sections are fixed and installed. 7) Positioning and adjusting bracket fixation When the crane is about to be lowered into place, use chain hoists and cranes together to position the lifting module at both ends. The crane will lift the module and the chain hoists will control its left and right position. After positioning and alignment, fix the bracket. 8) Inter-section connection The alignment is performed between the two supports, starting from the lowest layer of pipeline and proceeding layer by layer from bottom to top. When aligning layers, for metal pipe welding or pipe bonding, it is not necessary to release the pipe clamps on both supports and directly perform the alignment connection. For those with high aesthetic requirements or mechanical connections, the pipe clamps on both supports must be released before alignment. 9) Installation of fire hydrant boxes and integrated boxes The fire hydrant boxes are buried underground and connected to the fire pipes in the pipe trench. The integrated control box is a water and electricity integrated box, and is connected to the compressed air pipe and water pipe in the pipe trench.

2. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 1, characterized in that: In the main pipe trench support and branch pipe trench support, the width of the long bolt holes on the main uprights, main crossarms, support uprights, and support crossarms is the diameter of the connecting bolt plus 2mm, and the length of the long bolt holes is twice the diameter of the connecting bolt plus 2mm.

3. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 2, characterized in that: The main uprights and support uprights are made of No. 5 channel steel, the main crossbeams and support crossbeams are made of 50×4mm angle steel, the bottom anchoring steel plate is made of 10mm thick steel plate, and the side wall anchoring steel plate is made of 8mm thick steel plate.

4. A prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to any one of claims 1-3, characterized in that: The fire hydrant box consists of an outer frame and an inner box. The top of the inner box is open. The inner box is set inside the outer frame and supported on the bottom frame of the outer frame. A flange swivel joint is installed between one side of the outer frame and the corresponding side of the inner box wall. One end of the flange swivel joint is connected to a water outlet pipe through an elbow, and the other end of the flange swivel joint is connected to a fire pipe in the pipe trench through an elbow. The side of the flange swivel joint connected to the water outlet pipe is fixedly connected to the inner box wall, and the other side of the flange swivel joint connected to the fire pipe is fixedly connected to the bottom frame of the outer frame. The outlet end of the water outlet pipe passes through the inner box wall and extends into the inner box.

5. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 4, characterized in that: Gas springs are installed between the inner box wall on both sides of the flange rotary joint and the corresponding two sides of the outer frame. One end of each gas spring is hinged to the two sides of the inner box wall, with the hinge point located at the middle of the bottom of the two sides of the inner box wall. The other end of each gas spring is hinged to the two sides of the outer frame, with the hinge point located at the outer side of the two ends of the flange rotary joint.

6. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 5, characterized in that: The fire hydrant box also includes a support frame and a load-bearing cover. The vertical cross-section of the support frame is Z-shaped and the support frame is fixed to the top of the outer frame. The load-bearing cover is installed inside the support frame and has groove holes for lifting.

7. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 6, characterized in that: The four side walls of the outer frame are sealed and fixed with thin steel plates.

8. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 5, characterized in that: The rotating body on one side of the flange rotary joint is connected and fixed to the box wall of the inner box through the connecting angle bracket. The connecting angle bracket includes two vertically fixed connecting plates. One connecting plate is connected and fixed to the flange on one side of the flange rotary joint, and the other connecting plate is connected and fixed to the box wall of the inner box.

9. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches according to claim 5, characterized in that: The other side of the flange rotary joint is connected and fixed to the bottom frame of the outer frame through a connecting plate. The connecting plate includes a fixing plate and a fixing strap. The fixing plate is connected and fixed to the bottom frame of the outer frame, and the fixing strap is wrapped around the rotating body of the flange rotary joint. The two ends of the fixing strap are connected and fixed to the fixing plate respectively.

10. The prefabricated construction method for electromechanical integrated pipelines in exhibition hall trenches as described in claim 7, characterized in that, The installation and construction method for fire hydrant boxes includes the following steps: 1) Design of adjustable positioning device The adjustable positioning device includes an angle steel leveling bar, with adjusting nuts fixed at both ends of the angle steel leveling bar. Each adjusting nut is threaded with a T-shaped round steel leveling screw rod that runs through the top and bottom of the angle steel leveling bar. 2) Leveling of fire hydrant boxes Place two sets of parallel adjustable positioning devices on the top of the fire hydrant box. Adjust the relative height between the angle steel leveling rod and the water-stabilized layer ground to the specified height by rotating the T-shaped round steel leveling screw rod. Use pliers to clamp and fix the angle steel leveling rod in each set of adjustable positioning devices to the support frame on the fire hydrant box. 3) Fixing of fire hydrant boxes After the fire hydrant box is leveled, it is fixedly connected to the water-stabilized layer by round steel fasteners. The round steel fasteners are made of two round steel sections welded together. The two round steel sections are set in an L-shape. The vertical round steel section is anchored in the water-stabilized layer, and the horizontal round steel section is welded and fixed to the fire hydrant box. 4) The fire hydrant box is fixed by pouring concrete on the ground to complete the installation.

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