阅读说明：本技术 一种体外预应力筋防火隔热装置 (External prestressed tendon fire-proof heat-insulation device ) 是由 颜学渊 周成智 王黎园 杨国 黄晓锋 缪颖 汤昌环 于 2021-08-24 设计创作，主要内容包括：本发明涉及桥梁建筑技术领域,公开了一种体外预应力筋防火隔热装置,包括桥梁结构和通过设置锚固件接于桥梁结构上的体外预应力钢筋本体,所述体外预应力钢筋本体上套设有保护组件,保护组件包括保护套管、柔性树脂套管和可膨胀石墨内管,其中,保护套管采用隔热材料制成,保护套管、柔性树脂套管和可膨胀石墨内管自外向内依次套设于体外预应力钢筋本体上；本发明具有防火隔热、保证桥梁不易垮塌、安全性好的特点。(The invention relates to the technical field of bridge construction, and discloses an external prestressed reinforcement fireproof and heat-insulating device which comprises a bridge structure and an external prestressed reinforcement body connected to the bridge structure through an anchoring piece, wherein a protection assembly is sleeved on the external prestressed reinforcement body and comprises a protection sleeve, a flexible resin sleeve and an expandable graphite inner tube, the protection sleeve is made of a heat insulating material, and the protection sleeve, the flexible resin sleeve and the expandable graphite inner tube are sequentially sleeved on the external prestressed reinforcement body from outside to inside; the invention has the characteristics of fire prevention, heat insulation, difficult bridge collapse guarantee and good safety.)

1. The utility model provides an external prestressed reinforcement fire prevention heat-proof device, includes bridge construction (1) and connects external prestressed reinforcement body (3) on bridge construction (1) through setting up anchor assembly (2), its characterized in that: the outer prestressing steel body (3) of body goes up the cover and is equipped with protection subassembly (4), and protection subassembly (4) include protective case (41), flexible resin sleeve pipe (42) and expandable graphite inner tube (43), and wherein, protective case (41) adopt thermal insulation material to make, and protective case (41), flexible resin sleeve pipe (42) and expandable graphite inner tube (43) cover in proper order from the extroversion on locate on outer prestressing steel body (3).

2. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 1, characterized in that: the protective sleeve (41) is made of rock wool, aluminum silicate wool or glass fiber wool.

3. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 1, characterized in that: protective case (41) include first semicircle pipe (5) and second semicircle pipe (6), protective case (41) are formed by first semicircle pipe (5) and the concatenation of second semicircle pipe (6), be equipped with first connecting block (7) on the outer wall of first semicircle pipe (5), set up first connecting hole (8) that link up first connecting block (7) on first connecting block (7), be equipped with second connecting block (9) on the outer wall of second semicircle pipe (6), set up second connecting hole (10) that link up second connecting block (9) on second connecting block (9), when first semicircle pipe (5) and second semicircle pipe (6) concatenation are in the same place, first connecting hole (8) in first connecting block (7) are relative setting with second connecting hole (10) in second connecting block (9).

4. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 3, characterized in that: the first semicircular pipe (5) and the second semicircular pipe (6) penetrate through the stud bolt (11) into the first connecting hole (8) and the second connecting hole (10) and lock the first locking nut (12) matched with the thread on the stud bolt (11) into the stud bolt (11) so as to be spliced to form the protective sleeve (41).

5. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 3, characterized in that: still be equipped with backing plate (13) on bridge structures (1), be equipped with connecting rod (14) on the siding of bridge structures (1) side is kept away from in backing plate (13), and connecting rod (14) one end connects on backing plate (13), and the other end connects on first semicircle pipe (5).

6. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 5, characterized in that: the base plate (13) is connected to the bridge structure (1) through driving expansion bolts (15), and the expansion bolts (15) penetrate into the bridge structure (1) after penetrating through the base plate (13).

7. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 5, characterized in that: threaded hole (16) is opened on backing plate (13), and connecting rod (14) connect and offer the first external screw thread that suits with threaded hole (16) screw thread on backing plate (13) on the tip outer wall, and connecting rod (14) connect with this on backing plate (13) through the spiro union of first external screw thread and threaded hole (16).

8. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 5, characterized in that: still be equipped with position and connecting rod (14) adaptive installation piece (17) on the outer wall of first semicircle pipe (5), set up the mounting hole that supplies connecting rod (14) to pass on installation piece (17), connecting rod (14) connect the tip on first semicircle pipe (5) through passing the mounting hole on installation piece (17) with this connect on first semicircle pipe (5).

9. The in-vitro prestressed tendon fireproof and heat-insulating device according to claim 8, characterized in that: the connecting rod (14) penetrates through the outer wall of the end part of the mounting hole and is provided with a second external thread, and the connecting rod (14) penetrates through the end part of the mounting hole and is connected to the mounting block (17) through locking a second locking nut (18) matched with the second external thread.

Technical Field

The invention relates to the technical field of bridge construction, in particular to an external prestressed tendon fireproof heat-insulation device.

Background

At present, in bridge engineering, fire prevention design is rarely carried out on structures such as external tendons and the like; generally, when the bridge deck is subjected to a fire explosion accident, the bridge deck system and the bridge deck can play a role in heat insulation and protection on the external prestressed tendons at the lower part of the bridge deck system, so that the phenomenon that the structure of the external prestressed tendons is softened due to high temperature is prevented, and a fire which endangers the safety of the bridge rarely occurs in a river valley spanned under the bridge, so that the external prestressed tendons cannot be subjected to fire prevention design in the prior art; however, for the overpass and the urban viaduct, the underbridge may be threatened by explosion accidents, for example, the explosion accident occurs on a single-side lane under the overpass or the pedestrian overpass, before the fire fighting and traffic police department arrives at the site and carries out traffic control, the opposite lanes under the overpass and the overbridge generally still have traffic flow, if before the fire is extinguished, the external prestressed tendons lose their functions due to the softening of the high-temperature structure and fail, the phenomenon of collapse of the overpass is easily caused, which not only causes great social and economic loss, but also causes serious secondary accidents to endanger the life and property safety of the citizens. Therefore, there is an urgent need for a fire-proof design for the external prestressed tendons in the overpass or viaduct used in the dense areas of pedestrian and traffic flows.

Disclosure of Invention

In view of the above, the present invention provides an external prestressed tendon fireproof and heat-insulating device.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an external prestressed reinforcement fire prevention heat-proof device, includes the bridge construction and connects the external prestressed reinforcement body in the bridge construction through setting up anchor assembly, the cover is equipped with the protection subassembly on the external prestressed reinforcement body, and the protection subassembly includes protective case, flexible resin sleeve pipe and expandable graphite inner tube, and wherein, protective case adopts thermal insulation material to make, and protective case, flexible resin sleeve pipe and expandable graphite inner tube cover in proper order on locating the external prestressed reinforcement body from the extroversion.

Preferably, the protective sleeve is made of rock wool, aluminum silicate wool or glass fiber wool.

Preferably, the protective sleeve includes first semicircle pipe and second semicircle pipe, and the protective sleeve is formed by first semicircle pipe and the concatenation of second semicircle pipe, is equipped with first connecting block on the outer wall of first semicircle pipe, sets up the first connecting hole that link up first connecting block on the first connecting block, is equipped with the second connecting block on the outer wall of second semicircle pipe, sets up the second connecting hole that link up the second connecting block on the second connecting block, when first semicircle pipe and the concatenation of second semicircle pipe are together, first connecting hole in the first connecting block and the second connecting hole in the second connecting block are relative setting.

Preferably, the first semicircular pipe and the second semicircular pipe are spliced to form the protective sleeve by passing the stud bolts through the first connecting hole and the second connecting hole and locking the first locking nuts which are matched with the threads on the stud bolts into the stud bolts.

Preferably, the bridge structure is further provided with a base plate, a connecting rod is arranged on the plate wall of the base plate far away from the side of the bridge structure, one end of the connecting rod is connected to the base plate, and the other end of the connecting rod is connected to the first semicircular pipe.

Preferably, the backing plate is connected to the bridge structure through driving expansion bolts, and the expansion bolts penetrate into the bridge structure after penetrating through the backing plate.

Preferably, the backing plate is provided with a threaded hole, the connecting rod is connected to the outer wall of the end part of the backing plate and is provided with a first external thread matched with the thread of the threaded hole, and the connecting rod is connected to the backing plate through the first external thread and the threaded hole in a threaded manner.

Preferably, still be equipped with the installation piece that the position and connecting rod suited on the outer wall of first semicircle pipe, set up the mounting hole that supplies the connecting rod to pass on the installation piece, the tip that the connecting rod connects on first semicircle pipe connects with this on first semicircle pipe through passing the mounting hole on the installation piece.

Preferably, the connecting rod passes through the outer wall of the end part of the mounting hole and is provided with a second external thread, and the connecting rod passes through the end part of the mounting hole and is connected to the mounting block by being locked into a second lock nut matched with the second external thread.

Compared with the prior art, the invention has the advantages that:

1. the invention sequentially sleeves a protective sleeve, a flexible resin sleeve and an expandable graphite inner tube from outside to inside on the external prestressed reinforcement body, the protective sleeve made of thermal insulation material can well isolate the external temperature from transmitting to inside, the flexible resin sleeve has good thermal insulation property and elasticity, not only can further isolate the external temperature from transmitting to inside, but also can reserve a space meeting the requirements of thermal expansion and cold contraction, the expandable graphite inner tube has the characteristic of thermal expansion, when the external temperature is too high, the protective sleeve and the flexible resin sleeve can not completely isolate the high-temperature infiltration to cause the external prestressed reinforcement body to be softened by a high-temperature structure, the expandable graphite inner tube can play a supporting effect by self expansion, thereby delaying the time of the failure of the external prestressed reinforcement body, and further delaying the collapse time of a bridge, providing additional time for evacuation activities.

2. According to the invention, the protective sleeve is arranged into a protective structure formed by splicing the first semicircular pipe and the second semicircular pipe after the stud bolts penetrate into the first connecting hole and the second connecting hole and the first locking nut are locked, so that the protective sleeve can be conveniently replaced or maintained by workers when the protective sleeve is damaged in the later stage and the protective effect is deteriorated.

3. According to the invention, the first semicircular pipe can be connected to the bridge structure through the arrangement of the base plate and the connecting rod, so that the function of fixing the second semicircular pipe, the flexible resin sleeve and the expandable graphite inner pipe can be achieved, the fixing function on the in-vitro prestressed steel bar body can be further achieved, the retention time of the in-vitro prestressed steel bar body on the bridge structure after the high-temperature structure is softened can be delayed, and the in-vitro prestressed steel bar body can play a role of longer time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the present invention in practical use;

FIG. 3 is a front view of the present invention;

FIG. 4 is an enlarged view at A;

FIG. 5 is an enlarged view at B;

fig. 6 is an enlarged view at C.

Reference numerals: 1. a bridge structure; 2. an anchoring member; 3. externally prestressing the steel bar body; 4. a protection component; 41. protecting the sleeve; 42. a flexible resin sleeve; 43. an expandable graphite inner tube; 5. a first semi-circular tube; 6. a second semi-circular tube; 7. a first connection block; 8. a first connection hole; 9. a second connecting block; 10. a second connection hole; 11. a stud bolt; 12. a first lock nut; 13. a base plate; 14. a connecting rod; 15. an expansion bolt; 16. a threaded hole; 17. mounting blocks; 18. and a second lock nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 6, the invention provides an external prestressed reinforcement fireproof and heat-insulating device, which comprises a bridge structure 1 and an external prestressed reinforcement body 3 connected to the bridge structure 1 through an anchor 2, wherein the external prestressed reinforcement body 3 is sleeved with a protection assembly 4, the protection assembly 4 comprises a protection sleeve 41, a flexible resin sleeve 42 and an expandable graphite inner tube 43, the protection sleeve 41 is made of a heat-insulating material and can be made of common rock wool, aluminum silicate wool or glass fiber wool, the protection sleeve 41, the flexible resin sleeve 42 and the expandable graphite inner tube 43 are sequentially sleeved on the external prestressed reinforcement body 3 from outside to inside, and the protection sleeve 41 made of the heat-insulating material can well isolate the external temperature from transferring to inside through the arrangement of the protection sleeve 41, the flexible resin sleeve 42 and the expandable graphite, with this make external high temperature be difficult to exert an influence to the external prestressing steel body 3 that is in protective case 41, flexible resin sleeve 42 possesses good heat-proof quality and elasticity, not only can further completely cut off external temperature and transmit to inside, simultaneously, can also leave the space that satisfies expend with heat and contract with cold, expandable graphite inner tube 43 possesses the characteristic that receives thermal energy, when external temperature is too high, protective case 41 and flexible resin sleeve 42 can't totally obstruct the high temperature infiltration and lead to external prestressing steel body 3 to receive the high temperature structure when becoming soft, expandable graphite inner tube 43 can play the supporting effect to external prestressing steel body 3 through self inflation, with this time that can delay external prestressing steel body 3 effect inefficacy, thereby delay the time that the bridge collapsed, provide extra time for evacuation action.

The protective sleeve 41 comprises a first semicircular pipe 5 and a second semicircular pipe 6, the protective sleeve 41 is formed by splicing the first semicircular pipe 5 and the second semicircular pipe 6, a first connecting block 7 is arranged on the outer wall of the first semicircular pipe 5, the first connecting blocks 7 are symmetrically arranged on the outer wall of the first semicircular pipe 5 and are arranged at two ends of the arc part of the first semicircular pipe 5, a second connecting block 9 is arranged on the outer wall of the second semicircular pipe 6, the second connecting blocks 9 are symmetrically arranged on the outer wall of the second semicircular pipe 6 and are arranged at two ends of the arc part of the second semicircular pipe 6, meanwhile, one second connecting block 9 corresponds to one first connecting block 7, a first connecting hole 8 penetrating through the first connecting block 7 is formed in the first connecting block 7, a second connecting hole 10 penetrating through the second connecting block 9 is formed in the second connecting block 9, the arrangement of the first connecting hole 8 and the second connecting hole 10 is satisfied, when the first semicircular pipe 5 and the second semicircular pipe 6 are spliced together, the first connecting hole 8 in the first connecting block 7 and the second connecting hole 10 in the second connecting block 9 corresponding to the first connecting block 7 are oppositely arranged, and at the moment, the first connecting block 7 and the second connecting block 9 can be connected together by passing a stud bolt 11 into the first connecting hole 8 and the second connecting hole 10 and locking a first locking nut 12 which is matched with the thread on the stud bolt 11 into the stud bolt 11, so that the first semicircular pipe 5 and the second semicircular pipe 6 are spliced together; in the actual use process, the first connecting blocks 7 can be distributed on the outer wall of the first semicircular pipe 5 along the length direction of the first semicircular pipe 5 at equal intervals according to the length of the first semicircular pipe 5, and the second connecting blocks 9 can be distributed on the outer wall of the second semicircular pipe 6 along the length direction of the second semicircular pipe 6 at equal intervals according to the length of the second semicircular pipe 6, so that the first semicircular pipe 5 and the second semicircular pipe 6 can be better spliced together; through the aforesaid setting, adopt detachable mosaic structure to set up protective case 41, because it locates the outmost of external prestressing steel body 3, thereby cause the damage to lead to its protection effect variation because of external factors the easiest, at this moment, the user can pull down corresponding first lock nut 12 promptly through stud 11 that will be used for connecting first connecting block 7 and second connecting block 9, thereby with first semicircle pipe 5 and second semicircle pipe 6 from external prestressing steel body 3, later change or overhaul, facilitate the use.

The bridge structure 1 is further provided with a backing plate 13, the backing plate 13 is connected to the bridge structure 1 through driving expansion bolts 15, the expansion bolts 15 penetrate into the bridge structure 1 after penetrating through the backing plate 13, a connecting rod 14 is arranged on the plate wall of the backing plate 13 far away from the side of the bridge structure 1, one end of the connecting rod 14 is connected to the backing plate 13, and the other end of the connecting rod 14 is connected to the first semicircular pipe 5; the wall of the backing plate 13 far away from the bridge structure 1 is provided with a threaded hole 16, the connecting rod 14 is connected to the outer wall of the end part of the backing plate 13 and is provided with a first external thread matched with the thread of the threaded hole 16, the connecting rod 14 is connected to the backing plate 13 through the threaded connection of the first external thread and the threaded hole 16, the outer wall of the first semicircular tube 5 is provided with a mounting block 17 the position of which is matched with that of the connecting rod 14, the mounting block 17 is provided with a mounting hole for the connecting rod 14 to pass through, the end part of the connecting rod 14 connected to the first semicircular tube 5 is connected to the first semicircular tube 5 through the mounting hole on the mounting block 17, the connecting rod 14 is provided with a second external thread through the outer wall of the end part of the mounting hole, the connecting rod 14 passes through the end part of the mounting hole and is connected to the mounting block 17 through a second locking nut 18 locked in the end part matched with the second external thread, and through the arrangement, the backing plate 13, Connecting rod 14, installation piece 17, the setting up of second lock nut 18 makes first semicircle pipe 5 connect in bridge construction 1, thereby the second semicircle pipe 6 that makes and first semicircle pipe 5 splice mutually also can connect in bridge construction 1, and then can be to locating flexible resin sleeve 42 in protective case 41, expandable graphite inner tube 43 and external prestressing steel body 3 play the fixed action, so as to delay external prestressing steel body 3 because of the time that the high temperature structure stops on bridge construction 1 after becoming soft, make external prestressing steel body 3 can play the effect of longer time.

Example (b): this external prestressing tendons fire prevention heat-proof device is when installing, link together flexible resin sleeve 42 and expandable graphite inner tube 43 bonding earlier, later locate the outside of external prestressing tendons body with flexible resin sleeve 42 and the expandable graphite inner tube 43 cover that the bonding is accomplished, later through using anchor assembly 2 with external prestressing tendons body both ends connect on bridge construction 1, later squeeze into backing plate 13 through expansion bolts 15 on bridge construction 1, and insert connecting rod 14 on the backing plate, later splice first semicircle pipe 5 and second semicircle pipe 6, and make connecting rod 14 pass from the mounting hole in installation piece 17, later pass stud 11 and lock first lock nut 12 in to first connecting hole 8 and second connecting hole 10, lock second lock nut 18 on the tip that passes the mounting hole to connecting rod 14, can accomplish the installation.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the present invention as claimed.