CN114263111B - Fireproof and protective system of suspension bridge steel cable system - Google Patents
Fireproof and protective system of suspension bridge steel cable system Download PDFInfo
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- CN114263111B CN114263111B CN202210087543.6A CN202210087543A CN114263111B CN 114263111 B CN114263111 B CN 114263111B CN 202210087543 A CN202210087543 A CN 202210087543A CN 114263111 B CN114263111 B CN 114263111B
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- 239000000725 suspension Substances 0.000 title claims abstract description 35
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- 238000002955 isolation Methods 0.000 claims abstract description 42
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- 239000004964 aerogel Substances 0.000 claims description 21
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 10
- 239000003063 flame retardant Substances 0.000 claims description 10
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- 230000004888 barrier function Effects 0.000 claims description 5
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Abstract
The invention discloses a fireproof and protective system of a suspension bridge steel cable system, which comprises a main cable and a sling, wherein the sling is connected with the main cable through a cable clamp; the bottom fireproof part is wound and wrapped at the bottom end of the sling; the anti-collision protection part is sleeved on the outer side of the bottom fireproof part; the main cable isolation part comprises a mounting frame and a fire baffle; the cable clamp isolation part comprises a fixed sleeve, an upper annular fire-proof plate, a lower annular fire-proof plate and a locking mechanism; the bridge system provided by the invention takes the bottom end of the sling for fire prevention and protection, and the main cable and the cable clamp are isolated as a fire prevention theoretical basis, so that the fire prevention and protection functions of the whole suspension bridge are realized; the fireproof protection at the bottom end of the sling can effectively isolate fire disasters after accidents happen; the fire isolation device is arranged at a specific height of the main cable, so that the fire can be isolated, and the isolation time can be delayed due to the fact that the number of the fire isolation plates is multiple; the cable clip isolation part can push the distance of the flame cable clip, and the speed of rising of the flame can be reduced through the arrangement of the flame-proof plate, so as to provide time for fire fighting.
Description
Technical Field
The invention relates to the technical field of fire prevention and protection of suspension bridge steel cables, in particular to a fire prevention and protection system of a suspension bridge steel cable system.
Background
Suspension bridges refer to bridges having cables suspended by cable towers and anchored at both ends of the bridge or the two sides as the main load-bearing members of the superstructure. The cable geometry is determined by the equilibrium conditions of the forces, typically approaching a parabola. A plurality of hanging rods hang from the cable, so as to hang the bridge deck, stiffening girders are arranged between the bridge deck and the hanging rods, and a combined system is formed by the hanging rods and the cable, so that deflection deformation caused by load is reduced.
Because the suspension bridge structure has small overall rigidity and large flexibility, the main bearing structure is a sling and a main cable, the driving stability is poor, once a fire accident occurs, when the main cable or the sling is damaged at high temperature, the whole bridge can be in a paralyzed state, the traffic operation can be seriously influenced, the repair difficulty of the suspension bridge is also relatively large, the repair time is relatively long, and the loss after the fire is immeasurable. The mechanical properties of the main cable and the sling steel wire of the suspension bridge are greatly affected by fire.
The suspension bridge fire protection mainly comprises the following aspects: firstly, the part of the bottom end of the sling, which is easy to collide with a vehicle, needs to be subjected to fireproof and protective protection; secondly, preventing the fire from spreading on the main cable; thirdly, fire prevention of cable clamp of hoist cable and main cable junction prevents main cable and hoist cable fracture.
Therefore, how to provide an overall effective fire protection system for suspension bridge cable systems is a highly desirable problem for those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides a fire protection system for a suspension bridge cable system, which aims to solve the above-mentioned technical problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the fireproof and protective system of the suspension bridge steel cable system comprises a main cable and a sling, wherein the sling is connected with the main cable through a cable clamp; further comprises:
a bottom fire prevention section; the bottom fireproof part is wound and wrapped at the bottom end of the sling;
an anti-collision protection part; the anti-collision protection part is sleeved on the outer side of the bottom fireproof part;
a main cable isolation part; the main cable isolation part is arranged at any point of the main cable 10-20 m away from the bridge deck; comprising the following steps: the device comprises a mounting frame and a fire-isolating plate; the mounting frame is fixed on the main cable; the number of the fire-blocking plates is multiple, and the fire-blocking plates are connected to the mounting frame and are horizontally arranged at intervals; the main cable passes through the fire barrier;
a cable clip isolation part; the cable clamp isolation part comprises a fixed sleeve, an upper annular fire-isolating plate, a lower annular fire-isolating plate and a locking mechanism; the fixing sleeve is fixed on the sling, is closely adjacent to the cable clamp and is positioned below the cable clamp; the upper annular fire-isolating plate is sleeved outside the sling and fixedly connected with the fixing sleeve; the lower annular fire-isolating plate is sleeved outside the sling and is positioned below the upper annular fire-isolating plate; a plurality of steel cables are connected between the lower annular fire-isolating plate and the upper annular fire-isolating plate; the locking mechanism is used for detachably connecting the upper annular fire-barrier and the lower annular fire-barrier, and the steel cable is in a coiled state; when the lower annular fire-isolating plate contacts a fire source, the locking mechanism can release the connection relation between the lower annular fire-isolating plate and the upper annular fire-isolating plate, and enable the steel cable to be in a tensioning state, so that the distance between the upper annular fire-isolating plate and the lower annular fire-isolating plate is increased.
Through the technical scheme, the bridge system provided by the invention has the advantages that the bottom end of the sling is fireproof and protected, the main cable and the cable clamp are isolated as the fireproof theoretical basis, and the fireproof protection function of the whole suspension bridge is realized; the fireproof protection at the bottom end of the sling can effectively isolate fire disasters after accidents happen; the fire-fighting cable is arranged at a specific height, so that the fires can be isolated, and the number of the fire-fighting boards is multiple, so that the isolation time can be delayed, and more time is provided for disaster relief and extinguishment; the cable clamp isolation part can push the distance of flame cable clamp, can reduce the speed that the flame rose through the setting of flame baffle, for the fire fighting provides time, effectively prevent that the flame from spreading rapidly to on the main cable, can prevent simultaneously that the cable clamp from breaking, lead to the structure impaired.
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the bottom fire-proof part comprises an aerogel fiber layer, a flexible fire-proof cloth layer, a reinforcing layer and a decorative layer; the aerogel fiber layer is formed by aerogel fiber cloth strips wound on the outer side of the sling; the flexible fireproof cloth layer is wrapped on the outer side of the aerogel fiber layer; the reinforcing layer is adhered and wrapped on the outer side of the flexible fireproof cloth layer through an adhesive; the decorative layer is coated on the outer side of the reinforcing layer. According to the invention, the traditional basalt fiber cloth strip winding structure is changed into aerogel fiber cloth strip winding, the high temperature resistant advantage of aerogel fibers is utilized, the structural defect of multi-layer wrapping can be replaced, the fireproof flame-retardant requirement can be met only by stabilizing the structure through the flexible fireproof cloth layer and the reinforcing layer, the structure is greatly simplified, and the fireproof performance is improved.
Preferably, in the fireproof and protective system of a suspension bridge steel cable system, the flexible fireproof cloth layer is ceramic fiber cloth; the reinforcing layer is basalt gridding cloth, and the basalt gridding cloth is one or more layers. The ceramic fiber cloth is made by adding a certain proportion of organic fibers into ceramic fibers, spinning yarns with glass fiber or steel wire lining, and weaving the yarns into the cloth, and has the characteristics of high temperature resistance, low heat conductivity, thermal shock resistance and low heat capacity. Therefore, the fiber has good alkali resistance, flexibility and high tensile resistance in the warp and weft directions, can be widely used for inner and outer walls of buildings, fire resistance, heat preservation, crack resistance and the like, and has various performances superior to those of glass fibers.
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the anti-collision protection part comprises an inner protection cylinder and an outer protection cylinder; the inner protection cylinder is sleeved on the outer side of the bottom fireproof part in a fitting way, and flanges are arranged at two ends of the inner protection cylinder; the outer protective cylinder is sleeved on the outer side of the inner protective cylinder at intervals and is positioned between the two flange plates, and the two ends of the outer protective cylinder are connected with the two flange plates in a positioning manner through pins; a plurality of supporting springs are connected between the outer side wall of the inner protection cylinder and the inner side wall of the outer protection cylinder in a compressed mode; support blocks are fixed at two ends of the support spring, one support block is embedded into the outer side wall of the inner protection cylinder, and the other support block is attached to the inner side wall of the outer protection cylinder. The anti-collision protection part provided by the invention adopts the elastic supporting structure to connect the inner protection cylinder and the outer protection cylinder, and when the outer protection cylinder receives collision to damage the pin, the supporting spring expands outwards to form an outward opposing force, so that the anti-collision and protection effects are improved. The inner protection cylinder and the outer protection cylinder are of a half cylinder structure, the inner protection cylinder can be fastened on the outer side of the bottom fireproof part through the anchor ear, and the two half cylinders of the outer protection cylinder can be connected through bonding or pin connection.
Preferably, in the fire protection and protection system of a suspension bridge steel cable system, the mounting frame comprises a first vertical plate, a second vertical plate and a inclined panel; the top edge of the first vertical plate is fixedly connected with the main cable and is positioned below the main cable; the bottom edge of the second vertical plate is fixedly connected with the main cable and is positioned above the main cable, the second vertical plate is parallel to the first vertical plate, and the fixed point of the second vertical plate and the main cable is lower than the fixed point of the first vertical plate and the main cable; the two side edges of the inclined panel are respectively fixed with the top edge of the first vertical plate and the top edge of the second vertical plate; the fire-blocking plate is connected between the first vertical plate and the inclined panel; the edges of the two sides of the fire-blocking plate are respectively connected with the first vertical plate and the inclined plate in a sliding way; the inner sides of the first vertical plate and the inclined plate are provided with sliding grooves used for being connected with the fire-isolating plate; two side openings of the first vertical plate, the second vertical plate and the inclined plate are fixedly provided with sealing plates; the sealing plate is connected with the first vertical plate and the second vertical plate through bolts in a fastening mode, and threaded holes connected with the bolts are formed in the first vertical plate and the second vertical plate; the sealing plate is fixedly connected with the edge of the inclined panel through rivets. The mounting frame structure provided by the invention forms a triangle structure, so that a stable foundation can be provided for the installation of the fire-blocking plate, and a compliant relation is formed between the mounting frame structure and the inclined direction of the main cable, so that the influence on the stability of the main cable can be reduced to the minimum; the shrouding can further improve the stability of structure, and can prevent that the flame retardant coating from dropping.
Preferably, in the fire protection and protection system of a suspension bridge steel cable system, the fire-proof plate comprises a first half plate and a second half plate; a plurality of deep sockets are uniformly formed in one side edge of the first half plate, and a first semicircular notch is formed in the first half plate; the edge of one side of the second half plate is provided with a plurality of cutting bars which are inserted into the deep insertion holes, the edge of the second half plate is provided with a second semicircular notch, and the second semicircular notch and the first semicircular notch are combined to form a circular through hole for a main cable to pass through; a plurality of round through holes of the fire-blocking plates are formed along the inclined direction of the main cable; the sizes of the plurality of fire-isolating plates are gradually increased from top to bottom; and gaps between adjacent fire-resistant plates are filled with aerogel fireproof fiber isolating layers. The fire-isolating plate consists of two half plates, can be directly arranged outside the main cable in a involution way, has a simple structure and is easy to operate and assemble; each fire-blocking plate forms a triangle structure with the first vertical plate and the inclined plate, has good stability, and can not cause the problem of rapid collapse due to overlarge fire; the isolating layer can prevent the problem that a plurality of fire-isolating plates burn simultaneously, which leads to isolating failure.
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the first vertical plate and the second vertical plate are connected to the main cable through a sleeve; the sleeve is fastened on the main cable through a tightening bolt, and the first vertical plate and the second vertical plate are both fixed on the sleeve or are integrally formed with the sleeve. Simple structure is stable, and the wholeness is strong, and because the top can form a whole, can maintain stability all the time.
Preferably, in the fireproof and protection system of a suspension bridge steel cable system, the outer side edge of the lower annular fire-barrier is hinged with a plurality of outer strip-shaped isolation plates, and one end of the outer strip-shaped isolation plates, which is far away from the lower annular fire-barrier, is connected with the upper annular fire-barrier through shear pins; the top surface of the lower annular fire-isolating plate, which is close to the outer side edge, is circumferentially hinged with a plurality of inner strip-shaped isolating plates, and one end of the inner strip-shaped isolating plates, which is far away from the lower annular fire-isolating plate, is abutted to the top end of the outer strip-shaped isolating plates; the inner strip-shaped isolation plates and the outer strip-shaped isolation plates are arranged in a staggered mode. According to the invention, the expandable strip-shaped isolation plate structure is added, and after the upper and lower fire-isolating plates are separated, the shearing pins can be cut off by gravity, so that the isolation plate is expanded, and the isolation effect is improved; the inner strip-shaped isolation plate can fill the gap of the outer strip-shaped isolation plate, so that the fire source isolation with a larger area is realized.
Preferably, in the fireproof and protection system of a suspension bridge steel cable system, a bellows-shaped fire-isolating cloth sleeve is connected between the upper annular fire-isolating plate and the lower annular fire-isolating plate; the fire-isolating cloth sleeve is sleeved outside the sling; fire extinguishing dry powder is filled between the fire isolating cloth cover and the sling; gaps exist between the upper annular fire-isolating plate, the lower annular fire-isolating plate and the sling. The fire-isolating cloth sleeve can quickly isolate and extinguish the fire between the upper annular fire-isolating plate and the lower annular fire-isolating plate when being stretched, and meanwhile, the fire-isolating cloth sleeve is assisted by fire-extinguishing dry powder, so that the fire can be extinguished, and the fire can be prevented from remaining after isolation; the gap can provide space for the ejection of the fire extinguishing dry powder and the stretching of the fire isolating cloth cover
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the locking mechanism comprises a temperature sensor, a screw, a toothed nut, a servo motor and a driving gear; the temperature sensor is used for sensing a high-temperature signal and releasing the connection relation between the lower annular fire-barrier and the upper annular fire-barrier according to the high-temperature signal; the screw rods are vertically arranged, the bottom ends of the screw rods are fixed on the top surface of the lower annular fire-barrier, and the top ends of the screw rods penetrate through the upper annular fire-barrier; the toothed nut is in threaded connection with the top end of the screw rod and is tightly propped against the top surface of the upper annular fire-barrier plate; the servo motor is fixed on the top surface of the upper annular fire baffle plate through a bracket, and can be started according to the high-temperature signal sensed by the temperature sensor; the driving gear is connected with a power output shaft of the servo motor and meshed with external insections of the insection nut. The unlocking structure avoids a conventional mechanical structure, adopts intelligent induction control, has higher unlocking sensitivity, can perform quick reaction when the temperature rises suddenly, and has better use effect; the structure can enable the toothed nut to be quickly separated from the screw rod through rotation control of the servo motor, and the upper annular fire-barrier and the lower annular fire-barrier can be quickly separated under the action of gravity.
Preferably, in the fireproof and protection system of a suspension bridge steel cable system, the locking mechanism further comprises an isolation cover fastened on the outer sides of the screw rod, the toothed nut, the servo motor and the driving gear; the top surface of the isolation cover is provided with a cover body. The isolation cover can prevent the screw rod and the toothed nut from being corroded, and the cover body can be opened to realize the dripping of lubricating oil.
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the fire-proof device is sleeved on the top end of the sling before the sling is connected with the cable clamp. The sling is convenient to install and sleeve.
Preferably, in the fire-proof and protection system of a suspension bridge steel cable system, the fixing sleeve is tightly pressed and fixed on the sling through bolts. The connection is simple and the structure is stable.
Compared with the prior art, the invention discloses a fireproof and protective system of a suspension bridge steel cable system, which has the following beneficial effects:
1. the bridge system provided by the invention takes the bottom end of the sling for fire prevention and protection, and the main cable and the cable clamp are isolated as a fire prevention theoretical basis, so that the fire prevention and protection functions of the whole suspension bridge are realized; the fireproof protection at the bottom end of the sling can effectively isolate fire disasters after accidents happen; the fire-fighting cable is arranged at a specific height, so that the fires can be isolated, and the number of the fire-fighting boards is multiple, so that the isolation time can be delayed, and more time is provided for disaster relief and extinguishment; the cable clamp isolation part can push the distance of flame cable clamp, can reduce the speed that the flame rose through the setting of flame baffle, for the fire fighting provides time, effectively prevent that the flame from spreading rapidly to on the main cable, can prevent simultaneously that the cable clamp from breaking, lead to the structure impaired.
2. The anti-collision protection part provided by the invention adopts the elastic supporting structure to connect the inner protection cylinder and the outer protection cylinder, and when the outer protection cylinder receives collision to damage the pin, the supporting spring expands outwards to form an outward opposing force, so that the anti-collision and protection effects are improved.
3. According to the invention, the traditional basalt fiber cloth strip winding structure is changed into aerogel fiber cloth strip winding, the high temperature resistant advantage of aerogel fibers is utilized, the structural defect of multi-layer wrapping can be replaced, the fireproof flame-retardant requirement can be met only by stabilizing the structure through the flexible fireproof cloth layer and the reinforcing layer, the structure is greatly simplified, and the fireproof performance is improved.
4. The mounting frame structure provided by the invention forms a triangle structure, so that a stable foundation can be provided for mounting the fire-blocking plate, and a compliant relation is formed between the mounting frame structure and the inclined direction of the main cable, so that the influence on the stability of the main cable can be reduced to the minimum.
5. The unlocking structure avoids the conventional mechanical structure, adopts intelligent induction control, has higher unlocking sensitivity, can perform quick reaction when the temperature rises suddenly, and has better use effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fire protection system for a suspension bridge cable system according to the present invention;
FIG. 2 is a schematic view of the layered structure of the bottom fire-protecting portion provided by the present invention;
FIG. 3 is a cross-sectional view of the impact protection provided by the present invention;
FIG. 4 is a schematic structural view of a main cable partition according to the present invention;
FIG. 5 is an external schematic view of the mounting bracket provided by the present invention;
FIG. 6 is an external schematic view of a flame retardant panel provided by the present invention;
FIG. 7 is a cross-sectional view of a flame retardant panel provided by the present invention;
FIG. 8 is a schematic view of the cable clip separator according to the present invention in an unused state;
FIG. 9 is a schematic view of a cable clip separator according to the present invention;
fig. 10 is a perspective view showing an expanded state of the inner and outer strip-shaped spacers provided by the present invention.
Wherein:
1-a main cable;
2-slings;
3-a bottom fire protection;
31-an aerogel fiber layer; 32-a flexible fire cloth layer; 33-enhancement layer; 34-a decorative layer;
4-an anti-collision protection part;
41-an inner protective cylinder; 411-flange plate; 42-an outer protective sleeve; 43-pins; 44-a support spring; 45-supporting blocks;
5-main cable insulation;
51-mounting rack; 511 a first riser; 512-a second riser; 513-a ramp panel; 514-closing plates; 515-bolt; 516-a threaded hole; 517-rivets; 52 fire-barrier plates; 521 first half plate; 5211-deep socket; 5212-a first semi-circular slot; 522-second half plate; 5221-cutting; 5222-second semi-circular slot; 53-aerogel fire resistant fiber insulation;
6-cable clip spacers;
61-fixing the sleeve; 62-upper annular flame-proof plate; 621-shearing pins; 63-a lower annular flame-retardant plate; 631-outer strip-shaped separator plates; 632-inner strip-shaped isolation plates; 64-locking mechanism; 641-temperature sensor; 642-screw; 643-a toothed nut; 644-a servo motor; 645-a drive gear; 646-isolation cover; 6461-cover; 65-steel rope; 66-fire-isolating cloth cover.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 10, the embodiment of the invention discloses a fire prevention and protection system of a cable system of a suspension bridge, which comprises a main cable 1 and a sling 2, wherein the sling 2 is connected with the main cable 1 through a cable clamp; further comprises:
a bottom fireproof part 3; the bottom fireproof part 3 is wound and wrapped at the bottom end of the sling 2;
an anti-collision protection part 4; the anti-collision protection part 4 is sleeved on the outer side of the bottom fireproof part 3;
a main cable isolation part 5; the main cable isolation part 5 is arranged at any point of the main cable 1, which is 10-20 meters away from the bridge deck; comprises a mounting frame 51 and a fire-barrier 52; the mounting frame 51 is fixed on the main cable 1; the number of the fire-blocking plates 52 is multiple, and the fire-blocking plates 52 are connected to the mounting frame 51 and are horizontally arranged at intervals; the main cable 1 passes through the fire-barrier 52;
a cable clip spacer 6; the cable clip isolation part 6 comprises a fixed sleeve 61, an upper annular fire-barrier 62, a lower annular fire-barrier 63 and a locking mechanism 64; the fixing sleeve 61 is used for fixing the sling 2 and is adjacent to and below the cable clamp; the upper annular fire-blocking plate 62 is sleeved outside the sling 2 and fixedly connected with the fixed sleeve 61; the lower annular fire-barrier 63 is sleeved outside the sling 2 and is positioned below the upper annular fire-barrier 62; a plurality of steel cables 65 are connected between the lower annular flame-proof plate 63 and the upper annular flame-proof plate 62; the locking mechanism 64 detachably connects the upper annular flame-retardant plate 62 and the lower annular flame-retardant plate 63, and makes the steel cable 65 in a coiled state; when the lower annular fire-barrier 63 contacts the fire source, the locking mechanism 64 can release the connection between the lower annular fire-barrier 63 and the upper annular fire-barrier 62 and make the steel cable 65 in a tensioned state, so as to increase the distance between the upper annular fire-barrier 62 and the lower annular fire-barrier 63.
To further optimize the above technical solution, the bottom fire protection part 3 comprises an aerogel fiber layer 31, a flexible fire protection cloth layer 32, a reinforcing layer 33 and a decorative layer 34; the aerogel fiber layer 31 is formed of aerogel fiber strips wound on the outer side of the slings 2; the flexible fireproof cloth layer 32 is wrapped on the outer side of the aerogel fiber layer 31; the reinforcing layer 33 is adhered and wrapped on the outer side of the flexible fireproof cloth layer 32 through an adhesive; a decorative layer 34 is coated on the outside of the reinforcing layer 33.
To further optimize the above technical solution, the flexible fireproof cloth layer 32 is ceramic fiber cloth; the reinforcing layer 33 is basalt gridding cloth, and the basalt gridding cloth is one or more layers.
To further optimize the above solution, the crash protection section 4 comprises an inner protection cylinder 41 and an outer protection cylinder 42; the inner protective cylinder 41 is sleeved on the outer side of the bottom fireproof part 3 in a fitting way, and flanges 411 are arranged at two ends of the inner protective cylinder; the outer protective cylinder 42 is sleeved outside the inner protective cylinder 41 at intervals and is positioned between the two flange plates 411, and two ends of the outer protective cylinder 42 are connected with the two flange plates 411 in a positioning way through the pin 43; a plurality of supporting springs 44 are compressively connected between the outer sidewall of the inner protective cylinder 41 and the inner sidewall of the outer protective cylinder 42; support blocks 45 are fixed at two ends of the support spring 44, one support block 45 is embedded into the outer side wall of the inner protection cylinder 41, and the other support block 45 is attached to the inner side wall of the outer protection cylinder 42.
To further optimize the solution described above, the mounting frame 51 comprises a first upright 511, a second upright 512 and a sloping panel 513; the top edge of the first vertical plate 511 is fixedly connected with the main cable 1 and is positioned below the main cable 1; the bottom edge of the second vertical plate 512 is fixedly connected with the main cable 1 and is positioned above the main cable 1, the second vertical plate 512 is parallel to the first vertical plate 511, and the fixed point of the second vertical plate 512 and the main cable 1 is lower than the fixed point of the first vertical plate 511 and the main cable 1; the two side edges of the inclined panel 513 are respectively fixed with the top edge of the first vertical plate 511 and the top edge of the second vertical plate 512; the fire barrier 52 is connected between the first riser 511 and the inclined panel 513; the two side edges of the fire-barrier plate 52 are respectively connected with the first vertical plate 511 and the inclined plate 513 in a sliding way; the inner sides of the first riser 511 and the inclined panel 513 have a chute for connection with the fire barrier 52; a sealing plate 514 is fixed to openings on both sides of the first upright plate 511, the second upright plate 512 and the inclined plate 513; the sealing plate 514 is fastened and connected with the first vertical plate 511 and the second vertical plate 512 through bolts 515, and threaded holes 516 connected with the bolts 515 are formed in the first vertical plate 511 and the second vertical plate 512; the sealing plate 514 is fixedly connected with the edge of the inclined plate 513 by rivets 517.
To further optimize the solution described above, the fire barrier 52 comprises a first half 521 and a second half 522; a plurality of deep sockets 5211 are uniformly formed on one side edge of the first half plate 521, and a first semicircular groove opening 5212 is formed; the edge of one side of the second half plate 522 is provided with a plurality of cutting bars 5221 which are inserted into the deep insertion holes 5211, the edge of the second half plate 522 is provided with a second semicircular notch 5222, and the second semicircular notch 5222 and the first semicircular notch 5212 are combined to form a circular through hole for the main cable 1 to pass through; the circular through holes of the plurality of fire-blocking plates 52 are arranged along the inclined direction of the main cable 1; the plurality of fire-blocking plates 52 gradually increase in size from top to bottom; the gaps between adjacent fire baffles 52 are filled with aerogel fire resistant fiber insulation 53.
In order to further optimize the technical scheme, a plurality of outer strip-shaped isolating plates 631 are hinged to the outer side edge of the lower annular fire-isolating plate 63, and one end of the outer strip-shaped isolating plate 631, which is far away from the lower annular fire-isolating plate 63, is connected with the upper annular fire-isolating plate 62 through shear pins 621; the top surface of the lower annular fire-isolating plate 63 close to the outer side edge is circumferentially hinged with a plurality of inner strip-shaped isolating plates 631, and one end of the inner strip-shaped isolating plates 631 far away from the lower annular fire-isolating plate 63 is abutted against the top end of the outer strip-shaped isolating plates 632; the inner strip-shaped partition plates 632 are staggered with the outer strip-shaped partition plates 631.
In order to further optimize the technical proposal, a corrugated fire-insulating cloth sleeve 66 is connected between the upper annular fire-insulating plate 62 and the lower annular fire-insulating plate 63; the fire-isolating cloth cover 66 is sleeved outside the sling 2; fire-extinguishing dry powder is filled between the fire-insulating cloth cover 66 and the sling 2; gaps exist between the upper annular flame-proof plate 62 and the lower annular flame-proof plate 63 and the sling 2.
To further optimize the above solution, the locking mechanism 64 includes a temperature sensor 641, a screw 642, a toothed nut 643, a servo motor 644, and a driving gear 645; the temperature sensor 641 is used for sensing a high-temperature signal and releasing the connection relation between the lower annular fire-barrier 63 and the upper annular fire-barrier 62 according to the high-temperature signal 641; the screw 642 is vertically arranged, the bottom end of the screw 642 is fixed on the top surface of the lower annular fire-barrier 63, and the top end passes through the upper annular fire-barrier 62; the toothed nut 643 is in threaded connection with the top end of the screw 642 and is tightly propped against the top surface of the upper annular fire baffle 62; the servo motor 644 is fixed on the top surface of the upper annular flame-proof plate 62 through a bracket, and the servo motor 644 can be started according to a high-temperature signal sensed by the temperature sensor 641; the driving gear 645 is connected to a power output shaft of the servo motor 644, and is engaged with the outer insection of the insection nut 643.
In order to further optimize the above technical solution, the locking mechanism 64 further includes a cage 646 fastened on the outer sides of the screw 642, the toothed nut 643, the servo motor 644 and the driving gear 645; the top surface of the isolation cover 646 is provided with a cover 6461.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The fireproof and protective system of the suspension bridge steel cable system comprises a main cable (1) and a sling (2), wherein the sling (2) is connected with the main cable (1) through a cable clamp; characterized by further comprising:
a bottom fireproof part (3); the bottom fireproof part (3) is wound and wrapped at the bottom end of the sling (2); the bottom fireproof part (3) comprises an aerogel fiber layer (31), a flexible fireproof cloth layer (32), a reinforcing layer (33) and a decorative layer (34); the aerogel fiber layer (31) is formed by aerogel fiber strips wound on the outer side of the sling (2); the flexible fireproof cloth layer (32) is wrapped outside the aerogel fiber layer (31); the reinforcing layer (33) is adhered and wrapped on the outer side of the flexible fireproof cloth layer (32) through an adhesive; the decorative layer (34) is coated on the outer side of the reinforcing layer (33); the flexible fireproof cloth layer (32) is ceramic fiber cloth; the reinforcing layer (33) is basalt gridding cloth, and the basalt gridding cloth is one or more layers;
a collision protection unit (4); the anti-collision protection part (4) is sleeved on the outer side of the bottom fireproof part (3); the anti-collision protection part (4) comprises an inner protection cylinder (41) and an outer protection cylinder (42); the inner protection cylinder (41) is sleeved on the outer side of the bottom fireproof part (3) in a fitting way, and flanges (411) are arranged at two ends of the inner protection cylinder; the outer protection cylinder (42) is sleeved outside the inner protection cylinder (41) at intervals and is positioned between the two flange plates (411), and two ends of the outer protection cylinder (42) are connected with the two flange plates (411) in a positioning manner through pins (43); a plurality of supporting springs (44) are connected between the outer side wall of the inner protection cylinder (41) and the inner side wall of the outer protection cylinder (42) in a compressed mode; support blocks (45) are fixed at two ends of the support spring (44), one support block (45) is embedded into the outer side wall of the inner protection cylinder (41), and the other support block (45) is attached to the inner side wall of the outer protection cylinder (42);
a main cable isolation part (5); the main cable isolation part (5) is arranged at any point of the main cable (1) which is 10-20 meters away from the bridge deck; comprises a mounting frame (51) and a fire-proof plate (52); the mounting frame (51) is fixed on the main cable (1); the number of the fire-blocking plates (52) is multiple, and the fire-blocking plates (52) are connected to the mounting frame (51) and are horizontally arranged at intervals; the main cable (1) passes through the fire-barrier plate (52); the mounting frame (51) comprises a first vertical plate (511), a second vertical plate (512) and a inclined plate (513); the top edge of the first vertical plate (511) is fixedly connected with the main cable (1) and is positioned below the main cable (1); the bottom edge of the second vertical plate (512) is fixedly connected with the main cable (1) and is positioned above the main cable (1), the second vertical plate (512) is parallel to the first vertical plate (511), and the fixed point of the second vertical plate (512) and the main cable (1) is lower than the fixed point of the first vertical plate (511) and the main cable (1); the two side edges of the inclined panel (513) are respectively fixed with the top edge of the first vertical plate (511) and the top edge of the second vertical plate (512); the fire-blocking plate (52) is connected between the first vertical plate (511) and the inclined plate (513); the two side edges of the fire-blocking plate (52) are respectively connected with the first vertical plate (511) and the inclined plate (513) in a sliding way; the inner sides of the first vertical plate (511) and the inclined plate (513) are provided with sliding grooves for connecting with the fire-isolating plate (52); two side openings of the first vertical plate (511), the second vertical plate (512) and the inclined plate (513) are fixedly provided with sealing plates (514); the sealing plate (514) is fixedly connected with the first vertical plate (511) and the second vertical plate (512) through bolts (515), and threaded holes (516) connected with the bolts (515) are formed in the first vertical plate (511) and the second vertical plate (512); the sealing plate (514) is fixedly connected with the edge of the inclined panel (513) through rivets (517);
a cable clip isolation part (6); the cable clamp isolation part (6) comprises a fixed sleeve (61), an upper annular fire-proof plate (62), a lower annular fire-proof plate (63) and a locking mechanism (64); the fixing sleeve (61) is fixed on the sling (2) and is closely adjacent to the cable clamp and positioned below the cable clamp; the upper annular fire-isolating plate (62) is sleeved outside the sling (2) and is fixedly connected with the fixing sleeve (61); the lower annular fire-isolating plate (63) is sleeved outside the sling (2) and is positioned below the upper annular fire-isolating plate (62); a plurality of steel cables (65) are connected between the lower annular fire-isolating plate (63) and the upper annular fire-isolating plate (62); the locking mechanism (64) detachably connects the upper annular flame-retardant plate (62) and the lower annular flame-retardant plate (63) and enables the steel cable (65) to be in a coiled state; when the lower annular fire-isolating plate (63) contacts a fire source, the locking mechanism (64) can release the connection relation between the lower annular fire-isolating plate (63) and the upper annular fire-isolating plate (62) and enable the steel cable (65) to be in a tensioning state so as to increase the distance between the upper annular fire-isolating plate (62) and the lower annular fire-isolating plate (63); the locking mechanism (64) comprises a temperature sensor (641), a screw (642), a fluted nut (643), a servo motor (644) and a driving gear (645); the temperature sensor (641) is used for sensing a high-temperature signal and releasing the connection relation between the lower annular fire-barrier (63) and the upper annular fire-barrier (62) according to the high-temperature signal (641); the screw rods (642) are vertically arranged, the bottom ends of the screw rods (642) are fixed on the top surface of the lower annular fire-blocking plate (63), and the top ends of the screw rods penetrate through the upper annular fire-blocking plate (62); the toothed nut (643) is in threaded connection with the top end of the screw rod (642) and is tightly propped against the top surface of the upper annular fire baffle plate (62); the servo motor (644) is fixed on the top surface of the upper annular fire baffle plate (62) through a bracket, and the servo motor (644) can be started according to the high-temperature signal sensed by the temperature sensor (641); the driving gear (645) is connected with a power output shaft of the servo motor (644) and meshed with outer insections of the insection nut (643); the locking mechanism (64) further comprises an isolation cover (646) which is buckled on the outer sides of the screw rod (642), the toothed nut (643), the servo motor (644) and the driving gear (645); the top surface of the isolation cover (646) is provided with a cover body (6461).
2. A fire protection system for a suspension bridge cable system according to claim 1, wherein the fire barrier (52) comprises a first half plate (521) and a second half plate (522); a plurality of deep sockets (5211) are uniformly formed on one side edge of the first half plate (521), and a first semicircular groove opening (5212) is formed; one side edge of the second half plate (522) is provided with a plurality of cutting bars (5221) which are inserted into the deep insertion holes (5211), the edge of the second half plate (522) is provided with a second semicircular notch (5222), and the second semicircular notch (5222) and the first semicircular notch (5212) are combined to form a circular through hole for the main cable (1) to pass through; a plurality of round through holes of the fire-blocking plates (52) are formed along the inclined direction of the main cable (1); a plurality of the fire-blocking plates (52) gradually increase in size from top to bottom; the gaps between adjacent fire-barrier plates (52) are filled with aerogel fire-resistant fiber insulation layers (53).
3. The fire protection and protection system of a suspension bridge steel cable system according to claim 1, wherein a plurality of outer strip-shaped isolating plates (631) are hinged to the outer side edges of the lower annular fire-isolating plates (63), and one end of the outer strip-shaped isolating plates (631) away from the lower annular fire-isolating plates (63) is connected with the upper annular fire-isolating plates (62) through shear pins (621); the top surface of the lower annular fire-isolating plate (63) close to the outer side edge is circumferentially hinged with a plurality of inner strip-shaped isolating plates (631), and one end of the inner strip-shaped isolating plates (631), which is far away from the lower annular fire-isolating plate (63), is abutted to the top end of the outer strip-shaped isolating plate (632); the inner strip-shaped isolation plates (632) are staggered with the outer strip-shaped isolation plates (631).
4. A fire protection system for a suspension bridge cable system according to claim 3, characterized in that a bellows-like fire-barrier cloth cover (66) is connected between the upper annular fire-barrier plate (62) and the lower annular fire-barrier plate (63); the fire-isolating cloth sleeve (66) is sleeved outside the sling (2); fire-extinguishing dry powder is filled between the fire-insulating cloth sleeve (66) and the sling (2); gaps exist between the upper annular fire-isolating plate (62) and the lower annular fire-isolating plate (63) and the sling (2).
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| CN202210087543.6A CN114263111B (en) | 2022-01-25 | 2022-01-25 | Fireproof and protective system of suspension bridge steel cable system |
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| CN202210087543.6A CN114263111B (en) | 2022-01-25 | 2022-01-25 | Fireproof and protective system of suspension bridge steel cable system |
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| CN114263111B true CN114263111B (en) | 2023-12-29 |
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| CN108708280A (en) * | 2018-06-30 | 2018-10-26 | 中智桥康（武汉）科技有限公司 | A kind of suspension bridge main cable clamp ring seam safeguard structure and its manufacture construction method |
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| DE102008059747A1 (en) * | 2008-12-01 | 2010-06-10 | Engels Ingenieure Gmbh | Fire protection device for inner side of high-rise building facades, has fire protection blind with lamellas that are made of steel sheet with intumescent coating, and vertical pendulum locking device provided for fire protection blind |
| CN102863199A (en) * | 2012-09-21 | 2013-01-09 | 华南理工大学 | Preparation of geopolymer inorganic gelled material combining fire insulating and protecting functions and application |
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| CN114263111A (en) | 2022-04-01 |
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