UHPC-based assembled fire smoke exhaust fan room structure

Abstract

The application relates to a UHPC-based assembled fire smoke exhaust fan room structure, which comprises a main body structure, wherein the main body structure is prefabricated by using an ultra-high performance concrete (UHPC) material; the main body structure has a machine room enclosing wall barrel body, a first end cover and a second end cover; the machine room enclosing wall barrel body has a bottom plate and first and second side walls which are connected with the bottom plate and arranged vertically in parallel; the first and second end covers are installed at the first and second open ends of the machine room enclosing wall barrel body; smoke suction and exhaust ports are arranged on the first and second end covers and used for being connected with ventilation pipelines; and the fan is hung in the internal space of the main body structure through anti-seismic supports. The UHPC shell is adopted to bear the enclosure, decoration, structure bearing and part of the fireproof function, so that the integration of the building structure decoration and function is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of prefabricated buildings and fire smoke exhaust fan rooms, specifically relating to a prefabricated fire smoke exhaust fan room structure based on UHPC. Background Technology

[0002] In recent years, with the iterative updates of standards such as the "Code for Fire Protection Design of Buildings" and the "Technical Standard for Smoke Control Systems in Buildings," dedicated equipment rooms for fire ventilation systems have been explicitly required to ensure the safe evacuation of personnel during a fire. In particular, the "Technical Standard for Distributed Charging Facilities for Electric Vehicles" stipulates that underground parking garages must have fire protection units for every 1000 square meters, resulting in a significant increase in the number of fire ventilation systems. Traditional cast-in-place ventilation rooms occupy a large amount of usable building area. For example, a 40,000-square-meter underground parking garage would require approximately 30 smoke exhaust rooms, each occupying 20-40 square meters, totaling 600-1000 square meters, significantly encroaching on parking space and other functional layouts.

[0003] In existing technologies, traditional cast-in-place machine rooms are difficult to adapt to changes in function and equipment after the main structure is completed, resulting in the need to demolish and rebuild some of the original facilities, causing material waste and construction delays. They also lack spatial flexibility and are difficult to achieve flexible layout in terms of usage functions.

[0004] With the rapid development of industrialized construction and intelligent manufacturing, the application of prefabricated ventilation rooms has been promoted. These rooms are favored in large public and industrial buildings due to their advantages such as high construction efficiency, controllable quality, and space efficiency. However, existing prefabricated ventilation rooms still face the following problems and shortcomings in practice: Traditional ventilation room enclosures typically consist of steel frames plus metal / color steel plates / concrete blocks, where decoration and structure are often considered separately. Fire prevention requires additional measures, resulting in complex construction processes, high costs, and often unsatisfactory fire resistance. Furthermore, the fans in prefabricated ventilation rooms are often placed directly on the fan base plate, making it difficult to maintain stable operation under special conditions such as earthquakes or strong vibrations. Utility Model Content

[0005] In view of the above analysis, the present utility model aims to provide a UHPC-based prefabricated fire smoke exhaust fan room structure to solve one or more of the above-mentioned problems in the prior art.

[0006] The purpose of this utility model is achieved as follows: A prefabricated fire-fighting smoke exhaust fan room structure based on UHPC includes a main structure, which is prefabricated using ultra-high performance concrete (UHPC) material. The main structure has a fan room enclosure cylinder, a first end cover, and a second end cover. The fan room enclosure cylinder has a base plate and a first side wall and a second side wall connected to the base plate and arranged vertically and parallel to each other. The first end cover and the second end cover are installed at the first and second open ends of the fan room enclosure cylinder. Both the first end cover and the second end cover are provided with smoke intake and exhaust ports for connecting to ventilation ducts. The fan is suspended in the internal space of the main structure by an anti-seismic bracket.

[0007] Furthermore, the main structure also has a computer room maintenance door, which is located on the first or second side wall.

[0008] Furthermore, the inner walls of the computer room enclosure cylinder, the first end cover, the second end cover, and the computer room maintenance door are all provided with a SiO2 aerogel layer.

[0009] Furthermore, the main structure is suspended below the structural floor slab via connecting structures.

[0010] Furthermore, the seismic bracing includes a spring, a metal adapter, a first vertical metal rod, a support plate, and a second vertical metal rod. The metal adapter is hollow and has a top wall and a bottom wall. The top wall has a first through hole, and the bottom wall has a second through hole. The first vertical metal rod passes through the first through hole and can move along its centerline. The top of the first metal rod is fixedly connected to the top of the machine room or to the structural floor slab, and the bottom of the first metal rod is fixedly connected to the center of the support plate. The spring is sleeved on the first metal rod, with its top abutting against the top wall and its bottom abutting against the support plate. The top of the second vertical metal rod passes through the second through hole and is fixedly connected to the bottom wall using a nut. The bottom of the second vertical metal rod is connected to the fan's cover. The axes of the first and second vertical metal rods are collinear.

[0011] Furthermore, the first and second opening ends of the machine room enclosure cylinder are each provided with a first groove, and the first and second end caps are installed and fixed in the first groove.

[0012] Furthermore, a second recess is provided on the first or second side wall, and the machine room maintenance door is installed in the second recess by means of a hinge assembly.

[0013] Furthermore, both the first and second end caps have outwardly protruding smoke intake and exhaust ports, and the ports of the smoke intake and exhaust ports are provided with duct connection flanges, which are used to connect with the flanges of the ventilation ducts.

[0014] Furthermore, arrow-shaped pins are provided at the positions where the first end cap and the second end cap are embedded in the first groove. The inner wall of the computer room enclosure is equipped with pre-embedded buckles that cooperate with arrow-shaped pin buckles.

[0015] Furthermore, the first and second end caps are connected to the open ends of the machine room enclosure cylinder using a tenon and mortise joint structure. Alternatively, the first and second end caps can be directly connected to the machine room enclosure cylinder via expansion bolts.

[0016] Compared with the existing technology, the UHPC-based prefabricated fire smoke exhaust fan room structure provided by this utility model adopts ultra-high performance concrete as the main structure of the fan room. UHPC itself has high strength, high durability, and strong plasticity (decorative properties). In addition, UHPC itself has a certain fire resistance and is thin and lightweight, without any other skeleton. The fan room structure uses UHPC shell, which also serves as the external cladding material of the fan room structure, undertaking the functions of enclosure, decoration, structural load-bearing and some fire protection, thus achieving the integration of building structure decoration and function.

[0017] 2. The fan is suspended in the internal space of the main structure by an anti-vibration bracket, which can reduce vibration and ensure that the fan remains stable under special working conditions such as earthquakes or strong vibrations.

[0018] 3. A SiO2 aerogel layer is installed on the inner wall of the computer room structure to form a composite structure, achieving a fire resistance requirement of at least 2 hours. Utilizing the UHPC shell as a robust substrate and external protective layer, the aerogel layer is located internally, effectively blocking heat transfer to the structural core, protecting internal equipment and maintaining structural integrity in the event of a fire. Furthermore, by placing the SiO2 aerogel layer on the inner wall of the computer room, it is less susceptible to mechanical damage, making it superior to external bonding or sandwich structures. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the structure of the fan provided by this utility model, which is installed inside the machine room structure by an anti-seismic support; Figure 2 A schematic diagram of the structure of the seismic bracing provided by this utility model; Figure 3 Structural diagram of the UHPC-based prefabricated fire smoke exhaust fan room provided by this utility model. Figure 1 ; Figure 4 A schematic diagram showing the disassembly of the end cover wall and the open state of the machine room maintenance door based on the UHPC prefabricated fire smoke exhaust fan room structure provided by this utility model. Figure 5 Schematic diagram of the structure of the computer room enclosure cylinder provided by this utility model Figure 1 ; Figure 6 Schematic diagram of the structure of the computer room enclosure cylinder provided by this utility model Figure 2 ; Figure 7 A schematic diagram of the structure of the end cap side wall with a smoke extraction port provided by this utility model; Figure 8 A schematic diagram of the hinge assembly provided by this utility model; Figure 9 A schematic diagram of the structure of the hook screw provided by this utility model; Figure 10 Structural diagrams of the four connection structures provided by this utility model; Figure 11 The present invention provides a model for connecting ventilation ducts in a UHPC-based prefabricated fire-fighting smoke exhaust fan room structure. Figure 1 ; Figure 12 The present invention provides a model for connecting ventilation ducts in a UHPC-based prefabricated fire-fighting smoke exhaust fan room structure. Figure 2 ; Figure 13 The present invention provides a model for connecting ventilation ducts in a UHPC-based prefabricated fire-fighting smoke exhaust fan room structure. Figure 3 ; Figure 14 The present invention provides a model for connecting ventilation ducts in a UHPC-based prefabricated fire-fighting smoke exhaust fan room structure. Figure 4 ; Figure 15 The present invention provides a model for connecting ventilation ducts in a UHPC-based prefabricated fire-fighting smoke exhaust fan room structure. Figure 5 ; Figure 16 A schematic diagram of the connection between the end cap sidewall and the machine room enclosure cylinder provided by this utility model; Figure 17 A schematic diagram showing the connection between the end cap sidewall and the machine room enclosure cylinder provided by this utility model using a pin lock. Figure 18 Structural diagram of the UHPC-based prefabricated fire smoke exhaust fan room provided by this utility model. Figure 2 ; Figure 19 A schematic diagram of the structure of the computer room maintenance door and the main structure of the computer room provided by this utility model, showing the installation of a sealing and fireproof aerogel strip between them. Figure 20A schematic diagram of the first connection structure between the end cap sidewall and the machine room enclosure cylinder provided by this utility model; Figure 21 A schematic diagram of the second connection structure between the end cap sidewall and the machine room enclosure cylinder provided by this utility model; Figure 22 A cross-sectional view of the UHPC prefabricated fire smoke exhaust fan room structure with cooling function provided by this utility model. Figure 1 ; Figure 23 A cross-sectional view of the UHPC prefabricated fire smoke exhaust fan room structure with cooling function provided by this utility model. Figure 2 .

[0021] Figure label: 100. Computer room structure; 200. Structural floor slab; 300. Ventilation ducts; 1. Machine room enclosure cylinder; 11. First side wall; 111. Second groove; 12. Second side wall; 13. First opening end; 131. First groove; 1311. T-shaped groove; 1312. F-shaped groove; 1313. Wedge-shaped groove; 14. Second opening end; 15. Base plate; 151. Drain outlet; 16. Top plate; 1601. First connecting hole; 17. Fireproof aerogel strip; 18. Embedded buckle; 2. End cap sidewall; 21. First end cap; 211. T-shaped protrusion; 212. Y-shaped protrusion; 213. Wedge-shaped end; 22. Second end cap; 23. Smoke intake / exhaust port; 231. Duct connection flange; 24. Arrow-shaped pin; 25. Expansion bolt; 3. Machine room maintenance door; 31. Hinge assembly; 311. Hinge pin; 312. Shaft washer; 313. Cylinder hinge support; 314. Reinforcing metal rib; 4. Fan; 41. Cover; 42. Seismic brace; 421. Spring; 422. Metal adapter; 423. First vertical metal rod; 424. Support plate; 425. Second vertical metal rod; 43. Motor; 44. Internal circulation fan impeller; 45. Guide hole; 5. Connection structure; 51. Hook screw; 511. Hook part; 512. Locking nut; 52. Precast composite slab; 53. U-shaped hoop; 54. Rib; 541. Horizontal rib; 55. Stud; 56. First steel plate; 57. Second steel plate; 58. First angle steel; 6. SiO2 aerogel layer; 7. Electrical Warehouse; 8. Internal smoke exhaust duct; 81. Smoke exhaust duct; 82. Flexible connecting pipe; 9. Sprinkler system; 91. Sprinkler pipe; 92. Drain pipe; 93. Sprinkler head. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. It should be noted that, unless otherwise specified, the implementation methods and features in the implementation methods in this disclosure can be combined, separated, interchanged, and / or rearranged. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0024] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0025] Example 1 A specific embodiment of this utility model discloses a prefabricated fire-fighting smoke exhaust fan room structure based on UHPC, hereinafter referred to as "Fan Room Structure 100". Ultra-high performance concrete (UHPC) is used as the main structure of Fan Room Structure 100. Because UHPC itself has high strength, high durability, and strong plasticity (decorative properties), and because UHPC itself has a certain degree of fire resistance and is lightweight, without any other frame, the Fan Room Structure uses a UHPC shell, which also serves as the external cladding material of Fan Room Structure 100, undertaking the functions of enclosure, decoration, structural load-bearing, and some fire protection, thus achieving the integration of architectural structure, decoration, and function.

[0026] like Figures 1 to 21As shown, the UHPC prefabricated fire exhaust fan room structure includes a main structure, which is prefabricated using ultra-high performance concrete (UHPC) material. The internal space of the main structure houses a fan 4, which is suspended from the internal space of the main structure by a seismic brace 42. The seismic brace 42 is configured to reduce vibration and ensure stable operation of the fan under special conditions such as earthquakes or strong vibrations. The main structure includes a fan room enclosure cylinder 1, end cap side walls 2, and a fan room inspection door 3. The end cap side walls 2 include a first end cap 21 and a second end cap 22. The fan room enclosure cylinder 1, the first end cap 21, the second end cap 22, and the fan room inspection door 3 are all prefabricated using ultra-high performance concrete (UHPC) material. The fan room enclosure cylinder 1 has a bottom... The base plate 15 and the first side wall 11 and the second side wall 12 are connected to the base plate 15 and arranged vertically in parallel. The two ends of the machine room enclosure cylinder 1 in the horizontal direction have a first opening end 13 and a second opening end 14 arranged opposite to each other. The first end cover 21 and the second end cover 22 are respectively provided on the first opening end 13 and the second opening end 14. The first end cover 21 and the second end cover 22 are both provided with smoke inlet and exhaust outlet 23, which are used to connect with the ventilation duct 300. One of the smoke inlet and exhaust outlet 23 is a smoke inlet and the other is a smoke exhaust outlet. The machine room maintenance door 3 is provided on the first side wall 11 or the second side wall 12 and can be opened and closed. The fan 4 is provided in the internal space formed by the machine room enclosure cylinder 1 and the first end cover 21 and the second end cover 22.

[0027] To further enhance fire resistance, SiO2 aerogel layers 6 are applied to the inner walls of the equipment room enclosure cylinder 1, the first end cap 21, the second end cap 22, and the equipment room access door 3, forming a composite structure that meets the requirement of at least 2 hours of fire resistance. Utilizing the UHPC shell as a robust substrate and external protective layer, the aerogel layer, located internally, effectively blocks heat transfer to the structural core, protecting internal equipment and maintaining structural integrity in a fire. Furthermore, by placing the SiO2 aerogel layer 6 on the inner wall of the equipment room, it is less susceptible to mechanical damage, making it superior to external bonding or sandwich structures. This embodiment leverages the structural strength and initial fire barrier effect of the UHPC, combined with the superior thermal insulation performance of the SiO2 aerogel layer 6, to achieve a fire-resistant effect of "1+1>2".

[0028] When preparing the components such as the room enclosure cylinder 1, the first end cap 21, the second end cap 22, and the room inspection door 3, the SiO2 aerogel layer 6 can be directly laid on one side of the inner wall of the room corresponding to each component; or, after the overall assembly of the room structure 100 is completed on site, the SiO2 aerogel layer 6 can be laid on the inner wall of the room.

[0029] In this embodiment, the UHPC prefabricated fire smoke exhaust fan room structure can be divided into suspended type and ground type, which are used for underground garage and roof fire ventilation equipment, respectively.

[0030] The following explanation uses a suspended, UHPC-based prefabricated fire-fighting smoke exhaust fan room structure as an example: The computer room structure 100 is connected to the structural floor slab 200 via connecting structure 5 and is suspended below the structural floor slab 200. The specific structural design of connecting structure 5 is related to the structure of the computer room enclosure cylinder 1, specifically whether the computer room enclosure cylinder 1 includes a top plate 16, and includes the following possibilities: In the first case, the computer room enclosure cylinder 1 is also provided with a top plate 16, and the top plate 16 is provided with multiple first connection holes 1601; the connection structure 5 in this case includes a connecting screw, the top end of the connecting screw is detachably connected to or pre-embedded in the structural floor slab 200, and the bottom end of the connecting screw can be aligned with and pass through the first connection hole 1601 on the top plate 16, and locked with a nut inside the computer room to realize the mounting of the computer room structure 100.

[0031] Specifically, the connecting screw is a first fixing bolt. Multiple first fixing bolts extending downwards are pre-embedded at appropriate positions on the structural floor slab 200. These first fixing bolts can be aligned with and pass through the first connecting hole 1601 on the top plate 16, and are locked using a nut to achieve the mounting of the computer room structure 100. Alternatively, the connecting screw is a hook screw 51. The top of the hook screw 51 has a hook portion 511, and a hook mating portion that mates with the hook portion 511 is pre-embedded on the bottom surface of the structural floor slab 200. The bottom end of the hook screw 51 can be aligned with and pass through the first connecting hole 1601 on the top plate 16, and is locked using a locking nut 512 to achieve the mounting of the computer room structure 100. Optionally, the first fixing bolt can be a one-way bolt to prevent loosening. Correspondingly, the lower threaded section of the hook screw 51 can also adopt a one-way bolt thread structure.

[0032] In the second scenario, the connecting structure 5 includes a precast composite slab 52, which serves as the top slab 16 of the machine room enclosure cylinder 1. The precast composite slab 52 has truss reinforcement bars, which are cast integrally with the structural floor slab 200. In other words, the top slab 16 of the machine room includes the bottom slab portion of the composite floor slab, which is integrally fabricated with the machine room structure. At the construction site, the precast composite slab 52 on top of the machine room structure directly serves as the bottom formwork of the structural floor slab 200, becoming part of the structural floor slab 200. After the precast composite slab 52 is poured into the structural floor slab 200, a single slab bears the load. The truss reinforcement bars ensure a strong bond between the precast bottom slab and the precast composite slab 52, allowing the top slab 16 of the machine room to participate in the structural load-bearing process.

[0033] In the third scenario, the top opening of the computer room enclosure cylinder 1 is provided, and the top solid surfaces of the computer room enclosure cylinder 1, the first end cap 21, and the second end cap 22 constitute the connection end face; the connection structure 5 includes a pre-embedded connector, which is pre-embedded in the computer room enclosure cylinder 1, the first end cap 21, and the second end cap 22, and protrudes upward from the connection end face; the part of the pre-embedded connector protruding from the connection end face becomes an integral structure with the concrete structural floor slab 200 when the concrete structural floor slab 200 is poured.

[0034] For example, the pre-embedded connectors include one or more of the following: U-shaped hoop 53, reinforcing bar 54, and stud 55; wherein the U-shaped closed end of the U-shaped hoop 53 is set upwards; the exposed portion of the reinforcing bar 54 is bent outwards at 90°; or, two rows of reinforcing bars 54 are set to form a clamp, one row is bent inwards at 90°, and the other row is bent outwards at 90°. The exposed portions of the U-shaped hoop 53 and the reinforcing bar 54 meet the anchorage length. Taking the setting of the reinforcing bar 54 as an example, the construction process is as follows: during the formwork support process on the construction site, the machine room structure is first positioned, and then formwork needs to be erected to cover the opening at the top of the machine room. Structural concrete slabs are poured on the erected formwork, and the reinforcing bars 54 of the machine room side walls are anchored into the structural floor slab 200 for a firm connection.

[0035] In the fourth scenario, the connection structure 5 includes a first steel plate 56, a second steel plate 57, and a first angle steel 58. The first steel plate 56 is provided on the top outer wall surface of the machine room enclosure cylinder 1, the first end cap 21, and the second end cap 22. A second steel plate 57 is pre-embedded at a corresponding position on the bottom surface of the structural floor slab 200. The two vertical steel planes of the first angle steel 58 are welded to the first steel plate 56 and the second steel plate 57 respectively, thus achieving the fixed suspension of the machine room structure 100. In this case, this connection structure 5 can be used regardless of whether the machine room enclosure cylinder 1 has a top plate 16.

[0036] In the fifth scenario, the machine room enclosure cylinder 1 has a top slab 16, which is a section of the structural slab. The top slab 16 and the machine room enclosure cylinder 1 are integrally manufactured. Horizontal reinforcing bars 541 are pre-reserved on the sides of the top slab 16, and these horizontal reinforcing bars 541 are cast integrally with the surrounding structural floor slabs 200. Before the surrounding structural floor slabs 200 are poured on the construction site, the machine room structure is first positioned, and it is connected to the surrounding floor slab structure through the horizontal reinforcing bars 541 on the sides. The top slab 16 of the machine room participates in the load-bearing capacity of the entire structural floor slab 200.

[0037] In this embodiment, the equipment room enclosure cylindrical body 1 is an integral structure cast using a vertical molding process; alternatively, it can be produced using a centrifugal method. For example, the equipment room enclosure cylindrical body 1 adopts a cylindrical cuboid structure with planar dimensions of 2550mm*2750mm and a height of 1250mm, achieving a highly integrated and compressed space while accommodating different types of fan configurations. Furthermore, multiple equipment room enclosure cylindrical bodies 1 can be connected in series to form modular groups for use by multiple fan units.

[0038] In this embodiment, the computer room maintenance door 3 is a double door. The two maintenance doors, the maintenance door and the computer room enclosure cylinder 1, and the computer room enclosure cylinder 1 and its two side first end caps 21 and second end caps 22 all employ an inlaid structure with no through seams. For example, the first opening end 13 and the second opening end 14 of the computer room enclosure cylinder 1 are each provided with a first recess 131, and the first end cap 21 and the second end cap 22 are installed and fixed within the first recess 131. The first side wall 11 or the second side wall 12 is provided with a second recess 111, and the computer room maintenance door 3 is rotatably installed within the second recess 111 via a hinge assembly 31.

[0039] In this embodiment, the hinge assembly 31 can bear a large load and also realize the rotation opening and closing of the machine room maintenance door 3. Specifically, the hinge assembly 31 includes a hinge pin 311, a pivot washer 312, and a cylinder hinge support 313. The hinge pin 311, pivot washer 312, and cylinder hinge support 313 are all made of metal. The hinge pin 311 and cylinder hinge support 313 are arranged in pairs and arranged vertically. The pre-embedded part of the hinge pin 311 is pre-embedded in the machine room maintenance door 3, and the pre-embedded part of the cylinder hinge support 313 is pre-embedded in the side wall where the second groove 111 is provided. The insertion part of the hinge pin 311 can be inserted into the cylinder hinge support 313 and can rotate. A pivot washer 312 is provided between the hinge pin 311 and the cylinder hinge support 313. Furthermore, to enhance the load-bearing strength of the hinge assembly 31, both the hinge pin 311 and the cylinder hinge support 313 are equipped with two reinforcing metal ribs 314. That is, two hinge pins 311 are pre-embedded in the machine room access door 3, one above the other, and are used in conjunction with the hinge support also pre-embedded in the machine room enclosure cylinder 1. Both the hinge pin 311 and the cylinder hinge support 313 are equipped with two reinforcing metal ribs 314, which are located on the sides, increasing the connection contact surface and the structural section moment of inertia to ensure structural strength. A pivot washer 312 is provided between the hinge pin 311 and the cylinder hinge support 313 to reduce the friction generated by the rotation of the access door under gravity load, allowing the access door to be opened quickly and easily even after prolonged periods of inactivity and when metal oxidation has occurred.

[0040] Since the maintenance door 3 of the computer room needs to be opened for each maintenance, it needs to be easy to open and still achieve a fireproof sealing effect after closing. This can be achieved by installing a fireproof aerogel strip 17 on the contact surface between the maintenance door and the main body of the computer room structure 100. Specifically, at least one fireproof aerogel strip 17 is provided between the groove wall of the second groove 111 and the inner wall of the computer room maintenance door 3. By setting the fireproof aerogel strip between the computer room maintenance door 3 and the main body of the computer room structure, it is effective to prevent smoke from entering the computer room from the outside through the gap between the computer room maintenance door 3 and the main body of the computer room in the event of a fire. Preferably, there are two fireproof aerogel strips 17, one on the groove wall of the second groove 111 and one on the inner wall of the computer room maintenance door 3. The fireproof aerogel strips 17 are made of SiO2 aerogel material.

[0041] In this embodiment, both the first end cap 21 and the second end cap 22 have outwardly protruding smoke inlets 23, and the port of the smoke inlet 23 is provided with a duct connection flange 231, which is used to connect with the flange of the ventilation duct 300.

[0042] In this embodiment, the first end cap 21 and the second end cap 22 are installed on the first open end 13 and the second open end 14 of the computer room enclosure cylinder 1 by field assembly. In order to facilitate installation and reduce the use of fixing accessories, protrusions / grooves are provided at the groove positions of the computer room enclosure cylinder 1 and at the edge positions of the end caps. The cooperation of the protrusions and grooves forms a self-locking structure, thereby realizing the fixation of the position of the two end caps after installation.

[0043] An optional self-locking structure: The top of the first groove 131 is provided with a T-shaped slot 1311, and the bottom of the first groove 131 is provided with a horizontally placed F-shaped slot 1312; the first groove 131 has a vertical groove wall and a horizontal groove wall, the T-shaped slot 1311 is provided on the vertical groove wall at the top, and the F-shaped slot 1312 is provided on the horizontal groove wall at the bottom; the upper ends of the first end cap 21 and the second end cap 22 are provided with T-shaped protrusions 211 that fit the T-shaped slot 1311, and the lower ends of the first end cap 21 and the second end cap 22 are provided with protrusions 211 that fit the horizontally placed F-shaped slot 1312. The Y-shaped protrusion 212 is provided; when the upper surfaces of the first end cap 21 and the second end cap 22 abut against the horizontal groove wall at the top of the first groove 131, the lowest end of the T-shaped protrusion 211 is higher than the protruding part of the F-shaped groove 1312, and the first end cap 21 and the second end cap 22 can be moved horizontally towards the inside of the computer room until the T-shaped protrusion 211 moves above the T-shaped groove 1311. Then, the first end cap 21 and the second end cap 22 fall down, the T-shaped protrusion 211 can be inserted into the T-shaped groove 1311, and the Y-shaped protrusion 212 can be inserted into the horizontally placed F-shaped groove 1312. Install the first end cover 21 and the second end cover 22 in sequence. For example, when installing the first end cover 21, first lift the first end cover 21 as a whole. The upper surface of the first end cover 21 abuts against the horizontal groove wall of the first cylinder of the computer room enclosure cylinder 1. Move it horizontally from the outside to the inside of the computer room enclosure cylinder 1 until the T-shaped protrusion 211 of the first end cover 21 moves horizontally to the top of the T-shaped slot 1311 of the computer room enclosure cylinder 1. Then slowly lower the first end cover 21. Under gravity, the Y-shaped protrusion 212 of the first end cover 21 is inserted into the F-shaped slot 1312 of the computer room enclosure cylinder 1. The upper and lower ends of the first end cover 21 are completely closed, and the installation of the first end cover 21 is completed.

[0044] Another optional self-locking structure: The top of the first groove 131 is provided with a T-shaped slot 1311, and the bottom of the first groove 131 is provided with a wedge-shaped groove 1313; the top of the first groove 131 has a vertical groove wall and a horizontal groove wall, and the T-shaped slot 1311 is provided on the vertical groove wall at the top; optionally, the wedge-shaped groove 1313 can be provided on the horizontal groove wall at the bottom; the upper ends of the first end cap 21 and the second end cap 22 are provided with T-shaped protrusions 211 that are adapted to the T-shaped slot 1311, and the lower ends of the first end cap 21 and the second end cap 22 are provided with wedge-shaped grooves 1313. The wedge-shaped end 213 has a wedge-shaped inclined surface. When the upper surfaces of the first end cap 21 and the second end cap 22 abut against the horizontal groove wall at the top of the first groove 131, the lowest end of the T-shaped protrusion 211 is higher than the outer opening of the wedge-shaped groove 1313. The first end cap 21 and the second end cap 22 can be moved horizontally towards the interior of the machine room until the T-shaped protrusion 211 moves above the T-shaped groove 1311. Subsequently, the first end cap 21 and the second end cap 22 fall down, and the T-shaped protrusion 211 can be inserted into the T-shaped groove 1311, and the wedge-shaped end 213 can be inserted into the wedge-shaped groove 1313. Preferably, the inclined surface angle of the wedge-shaped groove 1313 is θ, where θ = 8.53°. In other words, wedge-shaped ramps are provided at the lower ends of the machine room enclosure cylinder 1 and the two end caps. The slope of the wedge-shaped ramps is 8.53°. Under this slope, the end caps will form a self-locking mechanism and will not slide relative to each other. To facilitate the installation of the end caps by workers, the following installation method can also be adopted: For example, place the machine room enclosure cylinder 1 on the ground, with the base plate 15 on the ground. When installing the first end cap 21, lift the first end cap 21 so that its lower end is close to the wedge-shaped groove 1313 at the lower end of the machine room enclosure cylinder 1, and push it horizontally into the machine room enclosure cylinder 1. When pushing, there is no need to lift the whole thing. Under the action of gravity, the wedge-shaped end 213 falls into the wedge-shaped groove 1313. The falling height of the wedge-shaped end 213 is the falling height of the T-shaped slot 1311. This installation method only requires a small amount of force to easily push the wedge-shaped groove 1313, forming a self-locking mechanism, and also has a certain limiting function.

[0045] To further lock the first end cap 21 and the second end cap 22, arrow-shaped pins 24 are provided at the positions where the first end cap 21 and the second end cap 22 are embedded in the first groove 131. Simultaneously, a pre-embedded buckle 18 is provided on the inner wall surface of the computer room enclosure cylinder 1 to engage with the arrow-shaped pins 24. Optionally, the pre-embedded buckle 18 can be a unidirectional deformable metal pre-embedded buckle 18. Furthermore, a sealing strip is provided at the connection between the computer room enclosure cylinder 1 and the end caps.

[0046] In one alternative embodiment, the first end cap 21 and the second end cap 22 are connected to the open end of the machine room enclosure cylinder 1 using a mortise and tenon joint structure; bolts can be used to help lock the mortise and tenon joint connection. Alternatively, the first end cap 21 and the second end cap 22 are directly connected to the machine room enclosure cylinder 1 using expansion bolts 25.

[0047] In one alternative embodiment, the seismic brace 42 includes a spring 421, a metal adapter 422, a first vertical metal rod 423, a support plate 424, and a second vertical metal rod 425. The metal adapter 422 is hollow and has a top wall and a bottom wall. The top wall has a first through hole, and the bottom wall has a second through hole. The first vertical metal rod 423 passes through the first through hole and is movable along its centerline. The top end of the first metal rod is fixedly connected to the top plate 16 of the machine room or to the structure... The floor slab 200 is fixedly connected. The bottom end of the first metal rod is fixedly connected to the center of the support plate seat 424. The spring 421 is sleeved on the first metal rod. The top end of the spring 421 abuts against the top wall, and the bottom end of the spring 421 abuts against the support plate seat 424. The top end of the second vertical metal rod 425 passes through the second through hole and is fixedly connected to the bottom wall with a nut. The bottom end of the second vertical metal rod 425 is connected to the cover 41 of the fan 4. The axes of the first vertical metal rod 423 and the second vertical metal rod 425 are collinear.

[0048] In one alternative implementation, see Figures 22 to 23 The computer room structure 100 has an internal smoke exhaust pipe 8. The two ends of the internal smoke exhaust pipe 8 are respectively connected to the smoke intake and exhaust port 23 on the first end cover 21 and the smoke intake and exhaust port 23 on the second end cover 22. The fan 4 is installed on the internal smoke exhaust pipe 8, and the internal smoke exhaust pipe 8 is also equipped with a cooling mechanism.

[0049] Specifically, the internal smoke exhaust pipe 8 includes two sections of smoke exhaust duct 81. The fan 4 is located inside the cover 41. The cover 41 has an air inlet and an air outlet. The air inlet and the air outlet are respectively connected to the smoke suction and exhaust port 23 on the first end cover 21 and the smoke suction and exhaust port 23 on the second end cover 22 through a section of smoke exhaust duct 81.

[0050] Furthermore, the internal smoke exhaust duct 8 also includes two flexible connecting pipes 82. The air inlet and air outlet of the hood 41 are respectively connected to the smoke exhaust ducts 81 on both sides through a flexible connecting pipe 82. The use of flexible connections can reduce noise.

[0051] In this embodiment, one or more of the following cooling mechanisms are provided on the internal smoke exhaust pipe 8: The first type of cooling mechanism includes a motor cooling system configured to dissipate heat and cool the motor 43 of the fan 4. Specifically, the motor cooling system is located at the rear end of the motor 43 of the fan 4. The motor cooling system uses an internal circulation fan impeller 44. The motor housing of the motor 43 has a guide pipe that communicates with the outside. Specifically, the motor housing has a guide hole 45, which is connected to the guide pipe (not shown in the figure). The bottom plate 15 of the machine room enclosure cylinder 1 has a through hole, and the guide pipe extends out of the through hole on the bottom plate 15 and communicates with the outside. In this way, airflow exchange between the inside of the motor housing and the outside is achieved through the guide pipe. When the fan 4 is running, fluid exchange with the outside is achieved through the guide pipe communicating with the motor housing, thereby achieving forced ventilation cooling of the fan motor 43. By setting up a motor cooling system with an internal circulation fan impeller 44 at the rear end of the motor 43 of the fan 4, the fan 4 operates and the motor 43 is cooled by forced ventilation through the guide hole 45, ensuring that the motor 43 can work for a long time and improving the service life of the fan.

[0052] The second type of cooling mechanism includes a water spray system 9, which rapidly cools the flue gas entering the internal exhaust pipe 8, especially the flue gas entering the fan 4. The water spray system 9 has a spray pipe 91 and a drain pipe 92. The inlet end of the spray pipe 91 is connected to a water source, and the outlet end of the spray pipe 91 is equipped with multiple nozzles 93. The bottom of the internal exhaust pipe 8 is equipped with a drain outlet, which is located at the bottom of the fan 4's cover 41. A drain drain is installed at the drain outlet. The bottom plate 15 of the machine room enclosure cylinder 1 is equipped with a drain outlet 151. The two ends of the drain pipe 92 are connected to the drain outlet and the drain outlet 151, respectively. The drain outlet 151 is connected to the building drainage pipe 92 through an external water pipe.

[0053] In one alternative embodiment, the nozzles 93 are arranged inside the shroud 41 of the fan 4, and multiple nozzles 93 can spray water toward the fan from different directions; and / or, the nozzles 93 are arranged in the upstream exhaust duct 81 of the fan. Here, upstream refers to the relative position in the direction of flue gas flow; the direction facing the flue gas is upstream, and the direction away from the flue gas after it flows is downstream, that is, the area between the nozzles 93 and the smoke inlet on the end cover wall 2.

[0054] A water spray system 9 is used to cool the flue gas entering the exhaust pipe 8 inside the machine room. The spray water pipe 91 has a diameter of DN32 and is made of plastic-lined steel pipe. The water pressure of the spray water pipe 91 is not less than 0.1MPa. The nozzle end of the spray water pipe 91 uses a closed-type temperature-sensing nozzle 93 with an operating temperature of 68℃. The flow rate of a single nozzle 93 is 2 L / s, and four nozzles 93 can be installed. A DN50 drain is installed at the bottom of the fan shroud 41, which is connected to the building drainage pipe 92 via a quick connector to lead to the drainage point. The water spray system 9 can reduce the flue gas temperature to 70℃, ensuring long-term operation of the fan. For example, reducing the flue gas temperature from 280℃ to 70℃ with an air volume of 36000m³ / h... 3 Based on the calculation of the / h fan, the required heat dissipation for flue gas is 2545 kW. Taking a cooling nozzle 93 with a single flow rate of 2 L / s and a total of 4 nozzles 93 as an example, without considering the latent heat of vaporization, it can provide 2675 kW of heat absorption, which can meet the flue gas cooling requirements and ensure the long-term operation of the fan; by spraying water to cool down, the temperature inside the machine room can be kept below 70℃, which can meet the long-term reliable operation of the electrical compartment 7.

[0055] In this embodiment, the UHPC prefabricated fire smoke exhaust fan room structure is also provided with an electrical compartment 7, which is arranged in the space between the inner wall of the fan room enclosure cylinder 1 and the outer wall of the internal smoke exhaust pipe 8.

[0056] Compared with the prior art, the UHPC-based prefabricated fire smoke exhaust fan room structure provided in this embodiment can achieve the following beneficial effects: 1. Ultra-high performance concrete (UHPC) is used as the main structure of the computer room. UHPC itself has high strength, high durability, and strong plasticity (decorative properties). UHPC itself has certain fire resistance and is thin and lightweight, without any other skeleton. The computer room structure uses UHPC shell, which also serves as the external cladding material of the computer room structure, undertaking the functions of enclosure, decoration, structural load-bearing and some fire protection, thus achieving the integration of building structure, decoration and function.

[0057] 2. The fan is suspended in the internal space of the main structure by an anti-vibration bracket, which can reduce vibration and ensure that the fan remains stable under special working conditions such as earthquakes or strong vibrations.

[0058] 3. This application innovatively combines UHPC material with SiO2 aerogel layer, utilizing the structural strength and initial fire barrier function of UHPC, and superimposed with the super thermal insulation performance of aerogel to form a "1+1>2" fire protection effect. It can effectively block heat transfer to the core of the structure, protect internal equipment and maintain the integrity of the structure under fire, and achieve the fire protection requirement of at least 2 hours.

[0059] 4. The fire ventilation equipment room, constructed using ultra-high performance precast concrete components, meets the specifications and provides a new structural form and approach for improving the utilization efficiency of underground parking garages. It solves the problems of the difficulty in flexibly arranging fully cast-in-place fire exhaust equipment rooms and the large amount of building area they occupy. The equipment room structure of this utility model can be hoisted above the parking spaces in the underground parking lot while maintaining a clear height of not less than 2200mm. It does not occupy building area or change the original function, and has very considerable economic benefits.

[0060] 5. The various parts of the computer room structure adopt a prefabricated component system and prefabrication assembly technology to achieve factory standardization, industrialization, and integrated use functions. This not only ensures production quality and has strong structural stability, but also allows for customization of different appearance structures and integrated decorative functions, which greatly improves the quality and efficiency of the construction process.

[0061] 5. The computer room structure of this utility model does not affect the progress of other main construction processes. It can be installed and set up in any process. If the plan is changed, it can greatly save economic costs, improve construction efficiency, and speed up the overall construction progress.

[0062] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A prefabricated fire-fighting smoke exhaust fan room structure based on UHPC, characterized in that, The system includes a main structure, which is prefabricated using ultra-high performance concrete (UHPC) material. The main structure has a machine room enclosure cylinder (1), a first end cap (21), and a second end cap (22). The machine room enclosure cylinder (1) has a base plate (15) and a first side wall (11) and a second side wall (12) connected to the base plate (15) and arranged vertically in parallel. The first end cap (21) and the second end cap (22) are installed at the first open end (13) and the second open end (14) of the machine room enclosure cylinder (1). Both the first end cap (21) and the second end cap (22) are provided with smoke inlets (23), which are used to connect to ventilation ducts (300). The fan (4) is suspended in the internal space of the main structure by the anti-seismic bracket (42).

2. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 1, characterized in that, The main structure also has a machine room maintenance door (3), which is located on the first side wall (11) or the second side wall (12).

3. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 2, characterized in that, The inner walls of the machine room enclosure cylinder (1), the first end cap (21), the second end cap (22), and the machine room maintenance door (3) are all provided with SiO2 aerogel layer (6).

4. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 1, characterized in that, The main structure is suspended below the structural floor slab (200) by the connecting structure (5).

5. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 1, characterized in that, The seismic bracing (42) includes a spring (421), a metal adapter (422), a first vertical metal rod (423), a support plate (424), and a second vertical metal rod (425). The metal adapter (422) is hollow inside and has a top wall and a bottom wall. The top wall has a first through hole and the bottom wall has a second through hole. The first vertical metal rod (423) passes through the first through hole and can move along the center line of the first through hole. The top of the first metal rod is fixedly connected to the top plate (16) of the machine room or to the structural floor slab (200). The bottom of the first metal rod is fixedly connected to the center of the tray seat (424). The spring (421) is sleeved on the first metal rod. The top of the spring (421) abuts against the top wall and the bottom of the spring (421) abuts against the tray seat (424). The top of the second vertical metal rod (425) passes through the second through hole and is fixedly connected to the bottom wall by a nut. The bottom of the second vertical metal rod (425) is connected to the cover (41) of the fan (4). The axes of the first vertical metal rod (423) and the second vertical metal rod (425) are collinear.

6. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 2, characterized in that, The first opening end (13) and the second opening end (14) of the machine room enclosure cylinder (1) are both provided with a first groove (131), and the first end cap (21) and the second end cap (22) are installed and fixed in the first groove (131).

7. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 6, characterized in that, A second recess (111) is provided on the first side wall (11) or the second side wall (12), and the machine room maintenance door (3) is rotatably installed in the second recess (111) through the hinge assembly (31).

8. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 1, characterized in that, Both the first end cap (21) and the second end cap (22) have outwardly protruding smoke inlets (23), and the smoke inlets (23) have duct connection flanges (231) at their ports. The duct connection flanges (231) are used to connect with the flanges of the ventilation duct (300).

9. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 6, characterized in that, Arrow-shaped pins (24) are provided at the positions where the first end cap (21) and the second end cap (22) are embedded in the first groove (131). The inner wall of the machine room enclosure cylinder (1) is provided with a pre-embedded buckle (18) that engages with the arrow-shaped pin (24).

10. The UHPC-based prefabricated fire-fighting smoke exhaust fan room structure according to claim 9, characterized in that, The first end cap (21) and the second end cap (22) are connected to the opening end of the machine room enclosure cylinder (1) by a tenon and mortise joint structure; Alternatively, the first end cap (21) and the second end cap (22) can be directly connected to the machine room enclosure cylinder (1) via expansion bolts (25).

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