CN218542314U - Fireproof heat-insulation light evacuation platform capable of being assembled quickly - Google Patents

Abstract

The utility model provides a fireproof heat-insulation light evacuation platform capable of being assembled quickly, which comprises a platform step plate, a platform support and a connecting piece, wherein the platform step plate is composed of step plate units, the step plate units comprise panel laths and penetrating pins, a plurality of step plate unit blocks are transversely arranged, and the step plate unit blocks are of a hollow structure and are filled with fillers; corresponding seam allowance structures are manufactured on two lateral edges of the step plate unit blocks in the transverse direction, at least two step plate unit blocks are transversely combined into a step plate unit, two adjacent step plate unit blocks in the step plate unit are spliced and combined through the seam allowance structures in the transverse direction, a through hole is arranged in the transverse direction of each step plate unit block, and a through pin is arranged in the through hole in a penetrating manner to enable each step plate unit block to be fixed into a whole; the platform support comprises a plurality of cross beams which are fixed on the side wall of one side of the subway tunnel, and the step plate units are arranged on the cross beams and are connected end to end in the longitudinal direction to form a platform step plate of the evacuation platform; the connecting piece fixes the step plate unit and the cross beam into a whole. The evacuation platform can be assembled quickly, the connection of products is firm and reliable, and the construction quality is guaranteed.

Description

Fireproof heat-insulation light evacuation platform capable of being assembled quickly

Technical Field

The utility model provides an evacuation platform in supporting tunnel among the track traffic especially provides the combined material system fire prevention heat-insulating light evacuation platform that can assemble fast on-the-spot.

Background

The subway is a sign for widening the space and developing at a high speed in urban construction and is an important component of traffic transportation. Meanwhile, the underground large shelter is also a wartime underground large shelter and a rapid evacuation channel. The sealing property of the subway environment and the long and narrow property of the tunnel are inherent characteristics different from other transportation modes. This feature makes the subway expand and spread along the tunnel when an accident (disaster) occurs. When an accident happens, people in the subway can be quickly evacuated, and the life safety of the people is ensured, so that the subway evacuation device is very important.

In order to solve the problems, an evacuation platform is arranged on one side in the subway tunnel and consists of a platform footplate and a platform support, the platform support is fixed on a main structure of the tunnel, and the footplate consists of footplate unit blocks and is fixed on the platform support. When the train or the rail transit equipment system breaks down, passengers can arrive at an evacuation platform which is parallel to a carriage and is flush with the height of a doorsill of the carriage door through the carriage door after the train is stopped stably, and can quickly and safely arrive at a station or a safety access along the evacuation platform, so that the safety of the passengers is ensured. Therefore, arranging the evacuation platform in the tunnel between the subway sections is an effective way to solve the problems.

The existing evacuation platform generally has the following problems:

(1) The step plate unit blocks need to be spliced and assembled in a factory according to the width of the step plate measured on site, and cannot be directly installed on site, so that the process is slow, the construction progress is influenced, and the transportation cost is increased;

(2) The step plate unit blocks in the evacuation platform are of a single-plate structure, so that the fireproof and heat-insulating properties are poor, and when a fire disaster occurs, the step plate of the evacuation platform is deformed and warped due to high temperature, so that the evacuation of passengers is seriously influenced, and the life safety of the passengers is threatened;

(3) The spliced step plate unit blocks are only connected by leaning on the transverse through pins in the middle of the step plate unit blocks, the problems that the upper surface of a platform is uneven, gaps exist among the step plates or the like easily exist, and the problems can cause passengers to trip in the emergency evacuation process to cause harm accidents.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to improve the problem among the prior art, provide a thermal-insulated light evacuation platform of fire prevention that can assemble fast at the scene.

A further object of the present invention is to provide such an evacuation platform that has improved safety.

The purpose of the utility model is realized like this:

a fireproof heat-insulation light evacuation platform capable of being assembled quickly,

the walking board comprises a platform walking board, a platform bracket and a connecting piece, wherein the platform walking board is composed of a plurality of walking board units, each walking board unit comprises a plurality of walking board unit blocks and penetrating pins, and the rectangular walking board unit blocks are transversely arranged in the width direction of the walking board unit blocks so as to meet the width requirement of the platform; each step plate unit block is a batten with a hollow structure, and a filler is filled in a hollow cavity of each step plate unit block; making corresponding seam allowance structures on two lateral edges of the step plate unit blocks in the transverse direction, transversely combining at least two step plate unit blocks into a step plate unit, inserting and combining two adjacent step plate unit blocks in the step plate unit in the transverse direction through the seam allowance structures, arranging through holes in the transverse direction of the step plate unit blocks, aligning the through holes in the width direction of the platform to form pin through holes, and fixedly penetrating the pins in the pin through holes so as to fixedly connect the step plate unit blocks into a whole;

the platform support comprises a plurality of cross beams, and one end of each cross beam is provided with a connecting structure so as to be fixed on the side wall of one side of the subway tunnel; the step plate units are arranged on the cross beam, and the head and the tail of the step plate units which are adjacent in the longitudinal direction are connected with each other to form a platform step plate of the evacuation platform;

the connecting piece is a plurality of fixing pieces, and each fixing piece is connected with the step plate unit and the cross beam respectively, so that the step plate unit and the cross beam are fixed into a whole.

Preferably, the step plate unit block is made of glass fiber reinforced composite material, and the filler arranged in the hollow chamber is a flame-retardant heat-insulating filler, such as foamed cement or expanded perlite.

Preferably, the seam allowance structures on the two side edges of the step plate unit block in the width direction are in a convex-concave horizontal splayed structure which is matched with each other, and the upper part and the lower part of the side edges of the step plate unit block are provided with mutually-embedded surfaces, more preferably, conical embedded surfaces which are mutually embedded.

Preferably, the step plate unit block of the hollow structure has a structure of: the vertical upright ribs are arranged between the upper panel and the lower bottom plate, and a tubular cavity is formed between the adjacent vertical upright ribs.

Furthermore, the through holes are formed in the vertical studs, and the fillers filled in the cavities are also provided with through holes communicated with the through holes in the vertical studs to form the through pin holes.

Preferably, the connecting member may be of the following structure:

the connecting piece can be a U-shaped bolt fixing band which comprises a U-shaped band, wherein the U-shaped band is provided with an upward opening from bottom to top on the cross beam, the upper ends of two vertical side plates of the U-shaped band are respectively provided with a fixing part in a transverse outward extending mode, bolt holes are formed in the fixing parts, and matched bolts vertically penetrate through the step plate unit blocks downwards and penetrate through the bolt holes in the fixing parts and are fixed through nuts.

The connecting piece can also comprise hook screw rods and a fixing plate, holes or grooves are respectively formed in the two sides, opposite to the cross beam, of the lower bottom plate of the step plate unit block upwards until the penetrating pins are exposed, one ends of hooks of the two hook screw rods are hooked on the penetrating pins, and the other threaded ends of the hooks penetrate through the fixing plate and are fixed through nuts.

The connecting piece also can be steel band ring cover, every fixed steel band ring cover includes a steel ribbon, is equipped with the rectangular hole of a plurality of slopes on the steel ribbon, sets up the larynx hoop in the one end of steel ribbon the lower plate of walking plate unit piece upwards fluting until exposing and wear the round pin, steel band ring cover is established the crossbeam with it is fixed to wear the round pin to tighten.

Preferably, the evacuation platform further comprises a longitudinal reinforcing rib, wherein a longitudinal through hole is formed in each longitudinally arranged step plate unit, and the longitudinal reinforcing rib is penetrated through the longitudinal through hole, so that each longitudinally adjacent step plate unit is connected into a whole.

Furthermore, the longitudinal reinforcing ribs are connected end to end. Thus, the longitudinal reinforcing ribs can be integrated in the evacuation platform to connect the step plate units together.

Preferably, the longitudinal reinforcing rib is a steel pipe, and more preferably, a rectangular steel pipe can be selected.

In particular, the arrangement of the longitudinal stiffener in the step plate unit may be such that: the seam allowance structures on the edges of the two sides of the step plate unit blocks are provided with longitudinal grooves with openings on the side surfaces, and the two transversely adjacent step plate unit blocks are spliced and combined to form the longitudinal through holes, wherein the longitudinal reinforcing ribs are penetrated.

The longitudinal through-holes may be further provided at outer ends of the step plate unit blocks at both ends of the step plate unit, in which the longitudinal reinforcing ribs are penetrated.

For the engagement with the through-pin, a transverse through-hole is provided in the longitudinal reinforcement, through which the through-pin passes.

Preferably, the filling is also filled in the steel pipe of the longitudinal reinforcing bead.

The utility model provides a thermal-insulated light evacuation platform of fire prevention that can assemble fast is strengthened through making hollow core plate and inorganic material light core material promptly filler with organic material, makes the combined material evacuation platform footplate that has the light weight, high strength and fire-resistant thermal-insulated function, has solved the safety problem in the conflagration. The step plate units are combined into the step plate unit, and the platform step plate is formed by the step plate units, so that the structure can realize quick field installation. The connecting pieces can flexibly adapt to the influence caused by different relative positions of the platform support and the pedal fixing point, the reliable fixation can be realized only by adjusting the length of the steel belt or adjusting the threaded connection structure of the threaded hook or adjusting the steel ribbon, the construction speed is improved, the product connection is firm and reliable, and the construction quality is ensured. The evacuation platform is internally provided with the transverse through pins and the longitudinal reinforcing ribs, so that the strength and rigidity of the platform footplate can be greatly improved, the bearing capacity is improved, the buckling deformation resistance is also improved at the high temperature of accidental fire, and the high temperature resistance of the evacuation platform is improved.

The present invention will be described in detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic side view of a composite fireproof and heat-insulating evacuation platform 1 according to an embodiment of the present invention;

fig. 2 is a schematic top view of the evacuation platform shown in fig. 1;

fig. 3 is a schematic structural view of a cross section of the evacuation platform shown in fig. 1;

FIG. 4 is a schematic view of a U-shaped connector used in the embodiment of FIG. 1;

FIG. 5 is a schematic view of a bolt used in conjunction with the U-shaped connector of FIG. 4;

fig. 6 to 8 are schematic views of three structures of the step plate unit block having a hollow structure in the step plate unit of the evacuation platform;

fig. 9 is a schematic side view of an evacuation platform according to embodiment 2 of the present invention;

fig. 10 is a schematic top view of the evacuation platform shown in fig. 9;

fig. 11 is a schematic structural view of a cross section of the evacuation platform shown in fig. 9;

FIGS. 12 and 13 are schematic views of hook screws and fastening plates used in the embodiment of FIG. 9;

fig. 14 is a schematic side view of an evacuation platform according to embodiment 3 of the present invention;

fig. 15 is a schematic top view of the evacuation platform shown in fig. 14;

fig. 16 is a schematic structural view of a cross section of the evacuation platform shown in fig. 14;

fig. 17 is a schematic cross-sectional structure view of the evacuation platform shown in fig. 14 showing a pin penetration position;

FIG. 18 is a schematic illustration of the construction of the steel tie used in the embodiment of FIG. 14;

fig. 19 is a schematic structural view of a cross section of the evacuation platform in which the longitudinal reinforcing steel pipe is added in embodiment 1;

FIG. 20 is a schematic view of the evacuation platform of FIG. 19 showing the configuration of the grooves formed on the block of the step plate;

FIG. 21 is a schematic view showing a structure in which a groove is formed in a block of the step plate unit adjacent to the block of the step plate unit shown in FIG. 20;

FIG. 22 is a schematic view showing a structure in which a through hole through which a longitudinal reinforcing rib is formed is provided at an end of a block of the stepping plate unit;

fig. 23 is a schematic structural view of a longitudinal section of the evacuation platform in which the longitudinal reinforcing steel pipes are added in embodiment 1;

fig. 24 is a schematic structural view of a cross section of an evacuation platform in which a longitudinal reinforcing steel pipe is added in embodiment 2;

fig. 25 is a schematic structural view of a cross section of an evacuation platform in which a longitudinal reinforcing steel pipe is added in embodiment 3;

fig. 26 is a structural view showing a cross section of the evacuation platform with the longitudinal reinforcing steel pipe added in embodiment 3 showing a pin passing position;

fig. 27 and 28 are schematic diagrams of the installation of the dredging platform in the subway tunnel provided by the utility model.

Detailed Description

The following is a detailed description of the composite material fireproof and heat-insulating evacuation platform provided by the present invention through three embodiments.

Example 1:

as shown in fig. 1 to 5, for one section of the fast-assembling fireproof and heat-insulating light evacuation platform provided by the present invention, the evacuation platform comprises a platform footplate 1, a platform bracket 2 and a connecting piece 3,

the platform tread 1 is composed of several tread units 11, fig. 1 and 2 show the partial case of two adjacent tread units 11 arranged longitudinally, each tread unit 11 in turn comprises several tread unit blocks 111 and pins 112 in the width direction of the tread, fig. 3 shows that in embodiment 1, the tread units 11 are composed of four tread unit blocks 111 in the transverse direction. The block of the step plate unit may be in various sizes with different widths as shown in fig. 6 to 8.

As shown in fig. 6, which is the widest step plate unit block in the present embodiment, the step plate unit block 111 is a rectangular slat with a hollow structure, and is made of a glass fiber reinforced composite material, and the structure of the step plate unit block 111 is: comprises an upper panel 111a and a lower panel 111b, four vertical studs 111c extending longitudinally in parallel and connecting the upper panel 111a and the lower panel 111b are arranged between the upper panel and the lower panel, and a tubular cavity 111d is formed between adjacent vertical studs 111 c. The side edges of the step plate unit block are provided with tabling surfaces which are mutually jogged up and down, specifically, the side edges of the step plate unit block in the two longitudinal directions are provided with sub-opening structures which are a convex horizontal splayed opening 111e and a concave horizontal splayed opening 111f which are mutually matched, and the tabling surfaces which are mutually matched and are conical and are symmetrical up and down are formed. The hollow chamber 111d of the step plate unit block 111 is provided with an inorganic material filler 111g, which has a flame retardant and heat insulating effect and may be foamed cement or expanded perlite. The cavity formed by splicing the convex horizontal splayed opening 111e and the concave horizontal splayed opening 111f at the embedding position of the two step plate unit blocks is also filled with a filler 111g (see figure 3).

Perforations are provided in parallel in the width direction of the four block flight units 111, the perforations are provided on the vertical studs 111c, and the filler 111g filled in the cavity is also provided with perforations that communicate with the perforations on the vertical studs. The assembled step plate units 11 are aligned with the through holes in the width direction of the platform to form through pin holes, and through pins 112 are fixedly arranged in the through pin holes, so that several step plate unit blocks 111 are fixedly connected into a whole. The through pin can be a threaded rod, two ends of the through pin are fixed through nuts, or the through pin can also be a hollow tube with threaded inner walls at two ends, and two ends of the through pin are fixed through screws.

The width requirement of the platform can be met by transversely arranging a plurality of rectangular step plate unit blocks 111. The step plate unit blocks with different width specifications can be selected, combined and matched according to the width requirement of the platform to form the step plate unit 11 meeting the requirement, so that the platform with qualified width can be quickly assembled on site according to the requirement.

The platform support 2 comprises a plurality of cross beams 21, one end of each cross beam is provided with a connecting structure 22 so as to be fixed on a side wall 01 (see fig. 27 and 28) at one side of the subway tunnel, the step plate units 11 are arranged on the cross beams 21, the platform supports 2 are arranged on the side wall 01 along the longitudinal direction of the tunnel at intervals, one step plate unit 11 is supported on at least two adjacent cross beams, and the step plate units are fixed on the cross beams 21 end to end, so that a platform step plate of the evacuation platform is formed; and a vertical plate 23 is also arranged at the outer end of the cross beam 21 to plug the outer end of the step plate unit 11.

The step plate unit placed on the platform support 2 needs to be fixed on the cross beam 21 of the platform support 2 by means of the connecting piece 3. In embodiment 1, the connecting member is a U-shaped fixing steel band with a bolt, wherein there is a U-shaped fixing band 31, as shown in fig. 4, the U-shaped fixing band 31 is a U-shaped body formed by steel bands, a fixing portion 311 is extended outward from the upper ends of two vertical side plates, and a bolt hole 311a is provided on the fixing portion 311. In use, the U-shaped fixing bands 31 are fitted to the cross member 21 with their openings facing upward from below, the fixing portions are abutted against the lower bottom surfaces of the step plate unit blocks, bolts 312 (see fig. 5) are inserted through the bolt holes in the fixing portions 311a, one U-shaped fixing band 31 is fitted with two bolts 312, and the bolts 312 vertically penetrate through the step plate unit block 111 downward and pass through the bolt holes in the fixing portions 311, and are fixed by nuts 312 a.

Through the above-mentioned description to embodiment 1, can clearly see that in the utility model provides an evacuation platform, each step plate unit block in the step plate unit combines through the bead structure on horizontal, and uses the bead structure of a protruding concave splayed mouth, forms two gomphosis faying faces from top to bottom, and the inclined plane of the symmetry of splayed mouth makes to the neutrality strong simultaneously, and in addition the round pin of wearing of transversely passing the step plate unit can guarantee that evacuation platform's surface smoothness improves greatly. The step plate unit block made of organic materials with a cavity structure and the inorganic fireproof filler filled in the cavity enable the step plate unit block to have good heat insulation and flame retardant effects. The pin can ensure that the footplate units of the combined evacuation platform form a whole. The step plate units are spliced and involuted with each other through the sub-openings, the step plate units can be quickly spliced on a construction site, and the sub-openings for butt joint are arranged among the butt joint plates to ensure that the surface of the evacuation platform after the step plate units are assembled is smooth and has no gaps. When the problem that installation errors are difficult is solved, the U-shaped fixing steel belt of the bolt is adopted, so that the construction speed is improved to a great extent, the connection of products is firm and reliable, and the construction quality is guaranteed.

Example 2:

as shown in fig. 9 to 13, another embodiment of the evacuation platform is provided, in which the platform footplate 1 and the platform support 2 are the same as in embodiment 1, except that the connecting members are hook screws 33 and fixing plates 34, and holes or grooves 111b1 are respectively opened upward on both sides of the lower base plate 111b of the footplate unit block 111 with respect to the cross beam until the through pins 112 transversely penetrating the footplate unit 11 are exposed, but the upper plate 111a is ensured to be complete. One ends of hooks 331 of the two hook screws 33 are inserted into the openings or the grooves 111b1 to hook the through pins 112, and the other threaded ends of the two hook screws 33 on both sides of the cross beam 21 pass through bolt holes 34a of a fixing plate 34 made of a channel steel and are fixed by nuts 34 b.

Example 3:

fig. 14 to 18 show still another embodiment of an evacuation platform, in which the platform footplate 1 and the platform support 2 are the same as those in embodiment 1, except that the connecting members are steel band loops, each fixed steel band loop comprises a steel band 35, the steel band 35 is provided with a plurality of inclined rectangular holes 351 to facilitate bending of the steel band, one end of the steel band is provided with a throat hoop 352, and the steel band is inserted into the throat hoop to fix and adjust the size of the steel band forming loop (this is the prior art and is not described herein). The lower plate 111b of the step plate unit block 111 is slotted 111b2 upwards until the through pin is exposed, and the steel belt ring is sleeved on the cross beam 21 and the through pin 112.

A common feature of embodiments 2 and 3 is that in the platform footplate and platform bracket mounting connection, a base shaft is provided by a through pin 112; the hook screw and the steel belt lantern ring in the connecting piece 3 are fastened on the through pin through the open hole or the groove formed in the lower bottom panel, so that a screw head cannot be left on the upper plane of the step plate, and the surface is smoother and more complete.

In the three embodiments, each connecting piece can be made of stainless steel, and the destructive effect of high-humidity corrosive environment in the iron tunnel is avoided.

In order to further improve the strength and rigidity of the evacuation platform, on the basis of the above embodiments, the evacuation platform further comprises longitudinal reinforcing ribs a, longitudinal through holes are arranged in the step plate units which are longitudinally arranged, and the longitudinal reinforcing ribs a are penetrated in the longitudinal through holes, so that the longitudinally adjacent step plate units are connected into a whole.

As shown in fig. 19, 20 to 22, 23, 24, 25 and 26, in the foregoing embodiments 1 to 3, longitudinal through holes are provided at both ends in the width direction of each step plate unit 11, and rectangular steel pipes as longitudinal ribs a are provided in the longitudinal through holes D. Specifically, as shown in fig. 20 and 21, in one step plate unit 111, the seam allowance structures on two side edges of two adjacent step plate unit blocks 111 are respectively provided with a longitudinal groove B and a longitudinal groove C with open side surfaces, and after the two transversely adjacent step plate unit blocks are spliced and combined, the two grooves form a longitudinal through hole in which a longitudinal reinforcing rib a is penetrated. Longitudinal through holes D are provided at outer ends of the step plate unit blocks 111 at both ends of the step plate unit 11, in which longitudinal beads a are penetrated.

Transverse perforations are provided in the longitudinal ribs so that the through-pins 112 pass through them.

The rectangular steel pipe of the longitudinal reinforcing rib is also filled with filler.

The step plate units are longitudinally connected, and the longitudinal reinforcing ribs A are also connected end to end. Thus, the longitudinal reinforcing ribs can be integrated in the evacuation platform to connect the step plate units together.

Through the longitudinal and transverse arrangement of the through pins 112 and the longitudinal reinforcing ribs A, the strength and rigidity of the evacuation platform can be greatly improved, and the hollow-structure step plate unit blocks and the filler filled in the hollow-structure step plate unit blocks can effectively prevent fire and insulate heat. Therefore, the utility model provides an evacuation platform can solve the problem that exists among the prior art well, and safe and reliable more can be assembled on the spot simultaneously, simple accurate.

Claims (10)

1. The utility model provides a thermal-insulated light evacuation platform of fire prevention that can assemble fast, includes platform step, platform support and connecting piece, its characterized in that:

the platform step plate is composed of a plurality of step plate units, each step plate unit comprises a plurality of step plate unit blocks and penetrating pins, and the rectangular step plate unit blocks are transversely arranged in the width direction of the step plate unit blocks so as to meet the width requirement of the platform; each step plate unit block is a batten with a hollow structure, and a filler is filled in a hollow cavity of each step plate unit block; making corresponding seam allowance structures on two lateral edges of the step plate unit blocks in the transverse direction, transversely combining at least two step plate unit blocks into a step plate unit, inserting and combining two adjacent step plate unit blocks in the step plate unit in the transverse direction through the seam allowance structures, arranging through holes in the transverse direction of the step plate unit blocks, aligning the through holes in the width direction of the platform to form pin through holes, and fixedly penetrating the pins in the pin through holes so as to fixedly connect the step plate unit blocks into a whole;

the platform support comprises a plurality of cross beams, and one end of each cross beam is provided with a connecting structure so as to be fixed on the side wall of one side of the subway tunnel; the step plate units are arranged on the cross beam, and the head and the tail of the adjacent step plate units in the longitudinal direction are connected to form a platform step plate of the evacuation platform;

the connecting piece is a plurality of fixing pieces, and each fixing piece is respectively connected with the step plate unit and the cross beam, so that the step plate unit and the cross beam are fixed into a whole.

2. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 1, wherein: the step plate unit block is made of glass fiber reinforced composite material; and/or the presence of a gas in the atmosphere,

the filler arranged in the hollow cavity is a flame-retardant heat-insulating filler.

3. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 2, wherein: the filler is foamed cement or expanded perlite.

4. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 1, wherein: the seam allowance structures on two side edges of the step plate unit block in the width direction are in a convex-concave horizontal splayed structure which is matched with each other, and the upper part and the lower part of the side edges of the step plate unit block are provided with tabling surfaces which are mutually jogged; and/or the presence of a gas in the atmosphere,

the structure of the hollow step plate unit block is as follows: the vertical upright ribs are arranged between the upper panel and the lower bottom plate, and a tubular cavity is formed between the adjacent vertical upright ribs.

5. The rapidly erectable fire-proof heat-insulating lightweight evacuation platform of claim 4, wherein: the through holes are formed in the vertical studs, and the fillers filled in the cavities are also provided with through holes which are communicated with the through holes in the vertical studs to form the through pin holes; and/or the presence of a gas in the gas,

the mutually-fitted fitting surfaces are tapered fitting surfaces that are mutually fitted.

6. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 1, wherein: the connecting piece is of the following structure:

the connecting piece is a U-shaped bolt fixing band which comprises a U-shaped band, wherein the U-shaped band is arranged on the cross beam from bottom to top with an upward opening, the upper ends of two vertical side plates of the U-shaped band are respectively provided with a fixing part in a transverse outward extension mode, a bolt hole is arranged on the fixing part, and a bolt vertically penetrates through the step plate unit block downwards, penetrates through the bolt hole in the fixing part and is fixed through a nut; alternatively, the first and second electrodes may be,

the connecting piece comprises hook screw rods and a fixing plate, holes or grooves are respectively formed in the lower bottom plate of the step plate unit block upwards relative to two sides of the cross beam until the penetrating pins are exposed, one end of each hook of the two hook screw rods is hooked with the penetrating pins, and the other threaded end of each hook of the two hook screw rods penetrates through the fixing plate and is fixed through nuts; alternatively, the first and second electrodes may be,

the connecting piece is steel band ring cover, every steel band ring cover includes a steel ribbon, is equipped with the rectangular hole of a plurality of slopes on the steel ribbon, sets up the larynx hoop in the one end of steel ribbon the lower plate of step plate unit piece is upwards slotted and is worn the round pin until exposing, steel band ring cover is established the crossbeam with it fastens fixedly to wear the round pin.

7. The rapidly erectable fire and heat insulated lightweight evacuation platform of any one of claims 1 to 6, wherein: the step plate unit is characterized by further comprising longitudinal reinforcing ribs, wherein longitudinal through holes are formed in the step plate units which are longitudinally arranged, and the longitudinal reinforcing ribs penetrate through the longitudinal through holes, so that the longitudinally adjacent step plate units are connected into a whole.

8. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 7, wherein:

the longitudinal reinforcing ribs are connected end to end; and/or the presence of a gas in the gas,

the longitudinal reinforcing ribs are steel pipes; and/or the presence of a gas in the atmosphere,

the seam allowance structures on the two side edges of the step plate unit blocks are provided with longitudinal grooves with openings on the side surfaces, two transversely adjacent step plate unit blocks are spliced and combined to form the longitudinal through holes, and the longitudinal reinforcing ribs are penetrated through the longitudinal through holes; and/or the presence of a gas in the gas,

the longitudinal through holes are formed in the outer side ends of the step plate unit blocks at the two ends of the step plate unit, and the longitudinal reinforcing ribs are penetrated through the longitudinal through holes; and/or the presence of a gas in the gas,

and transverse through holes are formed in the longitudinal reinforcing ribs, so that the through pins penetrate through the transverse through holes.

9. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 8, wherein: the longitudinal reinforcing ribs are rectangular steel pipes.

10. The rapidly erectable fire and heat insulating lightweight evacuation platform of claim 8, wherein: and filling the filler in the steel pipe of the longitudinal reinforcing rib.

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