CN112429035B

CN112429035B - Subway tunnel emergency evacuation platform

Info

Publication number: CN112429035B
Application number: CN202011277639.6A
Authority: CN
Inventors: 吴天泽
Original assignee: Qilu University of Technology
Current assignee: Li Jianghua
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2022-03-08
Anticipated expiration: 2040-11-16
Also published as: CN112429035A

Abstract

Emergent evacuation platform in subway tunnel includes fixed platform, and the stull is all installed at the both ends of fixed platform bottom. The invention has the positive effects that: according to the subway tunnel emergency evacuation platform, passengers can directly move to the evacuation platform from the door of a subway, after the steel pipes in the platform are drawn out, the mobile platform can vertically lift and form steps, the foldable step devices at the bottom of the integral device can also form the steps when in need, so that the difficulty in transferring from the bottom of the tunnel to the emergency evacuation platform is reduced, the two drawn steel pipes can be used as simple stretchers, the injured passengers can be transferred and treated in time, and the personnel evacuation efficiency is effectively improved.

Description

Subway tunnel emergency evacuation platform

Technical Field

The invention relates to the technical field of rail transit emergency evacuation equipment, in particular to a subway tunnel emergency evacuation platform.

Background

The subway is a sign for widening the space of urban construction and developing at a high speed, is an important component of transportation, and is used for ensuring the life safety of people when an accident happens, and whether people in the subway can be quickly evacuated or not, an emergency evacuation platform is a special channel arranged in a tunnel between the subways and used for evacuating passengers, the height of the existing emergency evacuation platform is basically consistent with that of a station platform, the passengers can be directly transferred to the evacuation platform from the positions of vehicle doors when the accident happens, if the serious accidents such as rear-end collision, derailment and the like happen to the subway, the passengers are injured, under the condition that the vehicle doors at two sides cannot be opened due to electrical failure, the passengers need to descend to the bottom of the tunnel from a lifesaving door and then climb to the evacuation platform, and the evacuation platform has a certain height and has great difficulty for the old, the weak, the sick and the disabled passengers, meanwhile, passengers with serious injuries cannot be transferred in time, and the passengers who are injured are carried and transferred by manpower blindly, so that secondary injuries are easily caused, the injured passengers cannot be treated in time, and the personnel evacuation efficiency is also seriously reduced.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide an emergency evacuation platform for a subway tunnel, which can maintain the same height as a vehicle door, and can draw out and switch inner steel pipes into a step shape as required, so that passengers at the bottom of the tunnel can conveniently climb up the evacuation platform in time, and the two drawn out steel pipes can be used as a simple stretcher, so as to realize timely transfer and treatment of injured passengers, thereby improving the efficiency of evacuation of people in an accident.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an emergency evacuation platform for a subway tunnel, which comprises a fixed platform, wherein cross braces are respectively arranged at two ends of the bottom of the fixed platform, one end of each cross brace is provided with an inclined strut, the other end of each cross brace is provided with a transversely arranged angle steel, the angle steel is positioned at the bottom of the fixed platform, a vertically arranged vertical rod is also arranged between each inclined strut and the fixed platform, a moving platform capable of vertically lifting is arranged at one side position on the fixed platform, a first steel pipe and a second steel pipe which are longitudinally arranged are arranged between the moving platform and the angle steel, two ends of the first steel pipe and the second steel pipe are positioned on the angle steel and can move along the length direction of the angle steel, the length of the moving platform is smaller than that of the steel pipes, folding cloth is connected between the first steel pipe and the second steel pipe, a limiting plate is arranged between the inclined struts and the vertical rods at two ends corresponding to the position of the moving platform, and T-shaped sliding blocks are arranged at two ends of the moving platform, the two ends of the limiting plate are provided with T-shaped slide rails matched with the T-shaped slide blocks, the T-shaped slide rails are vertically arranged and positioned at the bottoms of the angle steels, after a first steel pipe and a second steel pipe are pulled out of the angle steels, the moving platform can be lowered onto the limiting plate along the T-shaped slide rails, each angle steel is also provided with two groups of steel pipe limiting devices, each group of steel pipe limiting devices comprises a limiting sleeve fixed at the bottom of the angle steel, a vertical moving slide block is arranged in the limiting sleeve in a matched mode, a limiting rod is arranged on the vertical moving slide block and can penetrate through the limiting sleeve and the angle steel, the bottom of the vertical moving slide block is provided with a first spring, the first spring always has the tendency of pushing the limiting rod to extend into the angle steel, the front ends of the angle steels are respectively provided with a door leaf capable of opening and closing, wherein the first steel pipe is positioned between the door leaf and one of the limiting rod, the second steel pipe is positioned between the other limiting rod and the cross brace, and a foldable step device is arranged between the cross braces, the foldable step device comprises a first connecting rod and a second connecting rod which are longitudinally arranged, a first sliding groove matched with the first connecting rod and a second sliding groove matched with the second connecting rod are formed in the inner side of an inclined strut, a first flat plate is fixedly installed on the first connecting rod, a second flat plate is fixedly installed on the second connecting rod, the first flat plate and the second flat plate are hinged through a first rotating shaft, a first rotating shaft is located between the inclined struts, a positioning device is arranged at the upper side position of the first sliding groove and can position the first connecting rod in the first sliding groove, a bulge is further installed on the inclined strut and is in contact with the second flat plate, the included angle between the first flat plate and the second flat plate is an obtuse angle, after the positioning device removes limitation on the first connecting rod, the second connecting rod can be lowered to the bottommost part of the second sliding groove, and the first connecting rod moves to the bottommost part in the first sliding groove, at the moment, the included angle between the first flat plate and the second flat plate is a right angle, a positioning transverse groove communicated with the first sliding groove is further formed in the inclined strut, the positioning transverse groove is located at the bottom of the first sliding groove, and the first connecting rod can stretch into the positioning transverse groove. The locating device comprises a second rotating shaft installed on the inclined strut, a limiting baffle is installed on one side of the second rotating shaft, a connecting plate is installed on the other side of the second rotating shaft, a touch block is arranged in the limiting plate, a second spring is installed at the bottom of the touch block, the second spring always has the tendency that the touch block extends out of the limiting plate, the touch block is fixedly connected with the connecting plate, when the second spring is not compressed, the limiting baffle is located at the bottom of the first connecting rod and can limit the movement of the first connecting rod in the first sliding groove, after the mobile platform falls onto the limiting plate, the touch block moves downwards to compress the second spring, the limiting baffle and the connecting plate are driven to rotate, and when the limiting baffle rotates to the upper portion of the first connecting rod, the first connecting rod can freely fall in the first sliding groove. T type mounting groove has been seted up to fixed platform's bottom, and T type mounting groove arranges along fixed platform's length direction, installs the T type briquetting with T type mounting groove matched with on the stull. The top of fixed platform and moving platform all is equipped with anti-skidding burr. And a handle is arranged at the middle position of the first steel pipe. The top of the limiting rod is provided with a hemispherical cambered surface. The top of T type slide rail has seted up the horn mouth, and the horn mouth is located the bottom of angle steel.

The invention has the positive effects that: the subway tunnel emergency evacuation platform comprises a fixed platform and a movable platform, wherein the fixed platform and a subway door are at the same height, passengers can directly move to the evacuation platform from the subway door, the movable platform can vertically lift and form steps after steel pipes in the device are drawn out, the foldable step device at the bottom of the whole device can also form the steps when in need, so that the difficulty in transferring from the bottom of the tunnel to the emergency evacuation platform is reduced, the two drawn steel pipes can be used as simple stretchers, the injured passengers can be timely transferred and treated, and the personnel evacuation efficiency is effectively improved.

Drawings

FIG. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is an enlarged view of the view from A-A in FIG. 2;

FIG. 5 is an enlarged view of view B-B of FIG. 3;

FIG. 6 is an enlarged partial view of I of FIG. 5;

FIG. 7 is an enlarged view of the cross-sectional view taken along line C-C of FIG. 3;

FIG. 8 is a schematic view of the foldable step apparatus in a state of forming a step;

FIG. 9 is a schematic view showing a state where three steps are formed according to the present invention;

FIG. 10 is a schematic view of the positioning device;

FIG. 11 is a schematic view of the state of the present invention within a tunnel;

fig. 12 is a schematic view of the state in the tunnel when the present invention is shifted to the three-step stage.

Detailed Description

The invention relates to an emergency evacuation platform for a subway tunnel, which comprises a fixed platform 1, wherein the fixed platform 1 is as high as a subway door, passengers can be conveniently and directly transferred onto the evacuation platform from the door position when a fault occurs, cross braces 2 are respectively arranged at two ends of the bottom of the fixed platform 1, the cross braces 2 are used for supporting the fixed platform 1 on the cross braces 2, one end of each cross brace 2 is provided with an inclined brace 3, the inclined brace 3 is used for being fixed on the peripheral wall of the tunnel, the other end of each cross brace 2 is provided with a transversely arranged angle steel 4, and the angle steel 4 is positioned at the bottom of the fixed platform 1 and is arranged in the same direction as the cross braces 2 to play a role of commonly supporting the fixed platform 1. Still install the pole setting 5 of vertical setting between bracing 3 and fixed platform 1, the top of pole setting 5 can with angle steel 4 fixed connection, wherein form stable triangle-shaped structure between pole setting 5, bracing 3 and stull 2 and the angle steel 4, further ensured fixed platform 1's stationarity.

One side position on fixed platform 1 is equipped with the moving platform 6 that can vertically go up and down, and wherein moving platform 6 can cooperate completely to be located fixed platform 1 and as one of them partly, also can vertically move down and form the step of height dislocation between the fixed platform 1 to make the passenger of tunnel bottom climb up evacuation platform. As shown in fig. 4, be equipped with first steel pipe 7 and the second steel pipe 8 of vertical setting between moving platform 6 and the angle steel 4, the both ends of first steel pipe 7 and second steel pipe 8 are located angle steel 4 and can move along the length direction of angle steel 4, and wherein moving platform 6's length is less than the length of steel pipe, is connected with folding cloth 9 between first steel pipe 7 and the second steel pipe 8, first steel pipe 7, second steel pipe 8 and folding cloth 9 can constitute simple and easy stretcher to preliminary transfer the wounded in the accident. Corresponding to moving platform 6's position, install limiting plate 10 between bracing 3 and the pole setting 5 at both ends, moving platform 6's both ends are equipped with T type slider 11, and limiting plate 10's both ends are installed and are equipped with T type slider 11 matched with T type slide rail 12, the vertical setting of T type slide rail 12 just is located angle steel 4's bottom, and when first steel pipe 7 and second steel pipe 8 take out from angle steel 4 after, moving platform 6 can fall to limiting plate 10 along T type slide rail 12. Wherein be located first steel pipe 7 and second steel pipe 8 on the angle steel 4 and played the supporting role to moving platform 6, make moving platform 6 flush with fixed platform 1 mutually, after first steel pipe 7 and second steel pipe 8 are taken out on angle steel 4, because moving platform 6's length is less than the spatial distance between both ends angle steel 4, moving platform 6 that loses the steel pipe support just can descend because of the action of gravity, T type slider 11 enters into in T type slide rail 12, moving platform 6 falls to limiting plate 10 on, and fixed platform 1 between form the step of height dislocation.

In order to ensure the stability of the mobile platform 6 and avoid the deflection of the mobile platform 6 caused by uneven distribution of passengers thereon when the first steel pipe 7 and the second steel pipe 8 support the mobile platform 6, the first steel pipe 7 and the second steel pipe 8 need to be fixed at two sides of the mobile platform 6 respectively, as shown in fig. 5, two groups of steel pipe limiting devices are further installed on each angle steel 4, a door leaf 17 which can be opened and closed is installed at the front end of each angle steel 4, a bolt for locking and positioning can be installed between the door leaf 17 and the angle steel 4 so as to open and close the door leaf 17, the first steel pipe 7 and the second steel pipe 8 can be pulled away from the angle steel 4 when the door leaf 17 is opened, and the first steel pipe 7 and the second steel pipe 8 are limited on the angle steel 4 when the door leaf 17 is closed. Wherein first steel pipe 7 is fixed between door leaf 17 and a set of steel pipe stop device, and second steel pipe 8 is then fixed between another set of steel pipe stop device and stull 2, and first steel pipe 7 and second steel pipe 8 on the angle steel 4 can not remove at will, and moving platform 6 just can be steadily located fixed platform 1.

In order to carry out the location to the steel pipe, be convenient for again take out the steel pipe from angle steel 4 away, as shown in fig. 6, every group steel pipe stop device all includes the stop collar 13 of fixing in the angle steel 4 bottom, stop collar 13 fit in is installed and is erected and move slider 14, erect and move and install gag lever post 15 on the slider 14, gag lever post 15 can wear out stop collar 13 and angle steel 4 and play the effect of restriction steel pipe free movement, erect and move the bottom of slider 14 and install first spring 16, first spring 16 has the trend that promotes gag lever post 15 and stretch into in the angle steel 4 all the time. When the first steel pipe 7 is pulled out, the folding cloth 9 drives the second steel pipe 8 to move outwards together, and in the process, the second steel pipe 8 sequentially pushes the two limiting rods 15 to move downwards to overcome the elasticity of the first spring 16, so that the second steel pipe 8 is smoothly pulled out from the angle steel 4.

The foldable step devices are arranged between the inclined struts 3, and are positioned at the space positions between the inclined struts 3 in a normal state as shown in fig. 1 and 7, and do not occupy the space inside the tunnel, and when the climbing difficulty of the evacuation platform needs to be reduced, the foldable step devices can be drawn out of the bottommost steps as the integral device as shown in fig. 8 and 9. The foldable step device comprises a first connecting rod 18 and a second connecting rod 19 which are longitudinally arranged, a first sliding chute 20 matched with the first connecting rod 18 and a second sliding chute 36 matched with the second connecting rod 19 are formed in the inner side of the inclined strut 3, a first flat plate 21 is fixedly installed on the first connecting rod 18, a second flat plate 22 is fixedly installed on the second connecting rod 19, the first flat plate 21 and the second flat plate 22 are hinged through a first rotating shaft 23, and the first rotating shaft 23 is located between the inclined struts 3. A positioning device is arranged at the upper side position of the first sliding chute 20, the positioning device can position the first connecting rod 18 in the first sliding chute 20, a bulge 24 is further arranged on the inclined strut 3 corresponding to the position of the second flat plate 22, and the bulge 24 is in contact with the second flat plate 22 to enable the included angle between the first flat plate 21 and the second flat plate 22 to be an obtuse angle. After the positioning device removes the limitation on the first connecting rod 18, the second connecting rod 19 can be lowered to the bottommost part of the second sliding groove 36, the first connecting rod 18 moves to the bottommost part in the first sliding groove 20, at the moment, an included angle between the first flat plate 21 and the second flat plate 22 is a right angle, a positioning transverse groove 25 communicated with the first sliding groove 20 is further formed in the inclined strut 3, the positioning transverse groove 25 is located at the bottom of the first sliding groove 20, and the first connecting rod 18 can extend into the positioning transverse groove 25.

In the normal state as shown in fig. 7, since the positioning device positions the first link 18, the second link 19 is also positioned in the second chute 36 under the action of gravity in the chute inclined downward, the entire foldable step device is arranged along the length direction of the inclined strut 3, no additional space is occupied, and due to the arrangement of the protrusion 24, a certain angle exists between the first flat plate 21 and the second flat plate 22. When the positioning device releases the positioning of the first connecting rod 18, under the action of gravity, the first connecting rod 18 moves downwards in the first sliding chute 20, the second connecting rod 19 moves downwards in the second sliding chute 36 until the second connecting rod 19 descends to the bottommost part of the second sliding chute 36, at this time, the second connecting rod 19 stops moving downwards, but the second flat plate 22 can continue to rotate clockwise in the direction shown in fig. 7 by taking the second connecting rod 19 as the center due to inertia until the first connecting rod 18 descends to the bottommost part of the first sliding chute 20, the second flat plate 22 does not rotate any more, as shown in fig. 8, at this time, the included angle between the first flat plate 21 and the second flat plate 22 is a right angle, a bottommost step of the whole device is formed, the first connecting rod 18 enters the positioning transverse groove 25 after descending to the bottommost part of the first sliding chute 20, when a passenger climbs the step, the first flat plate 21 is applied with a vertically downward acting force and is decomposed to the first connecting rod 18 and the second connecting rod 19, the first link 18 tends to move inward of the positioning transverse slot 25, the second link 19 tends to move downward, and the first link 18 and the second link 19 cannot move further, so that the foldable step device shown in fig. 8 forms a stable step.

As shown in fig. 9, after taking out first steel pipe 7 and second steel pipe 8 from angle steel 4, moving platform 6 drops to and forms the step in the middle of on the limiting plate 10, and collapsible step device between the bracing 3 then can form the bottom step of integrated device, just so makes originally having fixed platform 1 of a take the altitude change into the tertiary step that has the difference in height to be convenient for the passenger and shift to evacuation platform from the tunnel bottom, personnel's evacuation's in the middle of the accident efficiency has been improved by a wide margin. As shown in fig. 11 and 12, the emergency evacuation platform for subway tunnels according to the present invention does not affect the normal movement of trains in the tunnels in both the normal use state and the step state with height difference. The device can be arranged in the tunnel at intervals along the length direction of the tunnel, for example, one subway tunnel emergency evacuation platform provided by the invention is arranged at intervals of 20 meters, and common evacuation platforms can be adopted among the subway tunnel emergency evacuation platforms.

Further, as shown in fig. 10, the positioning device includes a second rotating shaft 26 installed on the inclined strut 3, a limit baffle 27 is installed on one side of the second rotating shaft 26, a connecting plate 28 is installed on the other side of the second rotating shaft 26, a touch block 29 is arranged in the limit plate 10, a second spring 30 is installed at the bottom of the touch block 29, and the second spring 30 always tends to make the touch block 29 extend out of the limit plate 10. The contact block 29 is fixedly connected to the connecting plate 28, and when the second spring 30 is not compressed, as shown in fig. 10, the limit stop 27 is located at the bottom of the first link 18 and can limit the movement of the first link 18 in the first sliding slot 20, i.e. position the first link 18, so as to prevent the foldable step device from moving down along the inclined strut 3 to form the bottommost step. The positioning device is started after the movable platform 6 is lowered to the limiting plate 10 to form a middle step, so that the foldable step device moves downwards and forms a state shown in fig. 8, namely the structure of the middle step and the structure of the bottommost step form linkage, only the first steel pipe 7 and the second steel pipe 8 are pulled away from the angle steel 4, and after the movable platform 6 is lowered to the limiting plate 10 to form the middle step, the foldable step device moves downwards along the sliding groove to form the bottommost step of the integral device. After the moving platform 6 descends to the limiting plate 10, the contact block 29 moves downwards to compress the second spring 30, and drives the connecting plate 28 to rotate clockwise around the second rotating shaft 26 in the direction shown in fig. 10, the limiting baffle 27 synchronously rotates clockwise, the positioning of the first link 18 is released after the limiting baffle 27 rotates to the upper part of the first link 18, the first link 18 freely falls down in the first chute 20 under the action of gravity, and as shown in fig. 8 and 9, a three-step structure convenient for passengers to climb is finally formed.

Further, in order to facilitate the detachably mounting of the fixing platform 1 on the cross brace 2, the bottom of the fixing platform 1 is provided with a T-shaped mounting groove 31, the T-shaped mounting groove 31 is arranged along the length direction of the fixing platform 1, a T-shaped pressing block 32 matched with the T-shaped mounting groove 31 is mounted on the cross brace 2, and the fixing platform 1 can be pressed and fixed on the cross brace 2 by the T-shaped pressing block 32. In order to avoid the slipping phenomenon of passengers on the evacuation platform, the anti-slip ribs 33 are arranged on the tops of the fixed platform 1 and the movable platform 6.

In order to facilitate the first steel pipe 7 and the second steel pipe 8 to be drawn away from the angle iron 4 when the door 17 is opened, a handle 34 is arranged at the middle position of the first steel pipe 7, and in the process that the second steel pipe 8 is pulled away from the angle iron 4, due to the arrangement of the steel pipe limiting device, the second steel pipe 8 needs to extrude the limiting rod 15 to overcome the elastic force of the first spring 16 in the moving process, so that the limiting rod 15 moves downwards, in order to facilitate the second steel pipe 8 to apply component force to the limiting rod 15 in the transverse moving process to enable the limiting rod 15 to move downwards, as shown in fig. 6, a hemispherical cambered surface 35 is arranged at the top of the limiting rod 15, when the second steel pipe 8 contacts with the hemispherical cambered surface 35 in the transverse moving process, the second steel pipe 8 can extrude the limiting rod 15 to move downwards on the premise of receiving transverse pulling force, so that the second steel pipe 8 is pulled away from the angle steel 4, the arrangement of the hemispherical cambered surface 35 is also convenient for an operator to push the second steel pipe 8 to a set position in the angle steel 4 from the outside.

In order to guarantee that the moving platform 6 that loses the steel pipe and support falls the in-process, T type slider 11 can accurately fall into T type slide rail 12, the horn mouth has been seted up at the top of T type slide rail 12, and the width of horn mouth is greater than T type slider 11's width, the horn mouth is located the bottom that is located angle steel 4, and moving platform 6 whereabouts in-process, T type slider 11 at first fall into the horn mouth, enters into T type slide rail 12 by the guide effect of horn mouth again.

The technical solution of the present invention is not limited to the scope of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known techniques.

Claims

1. The utility model provides an emergent evacuation platform in subway tunnel which characterized in that: comprises a fixed platform (1), cross braces (2) are respectively arranged at two ends of the bottom of the fixed platform (1), an inclined strut (3) is arranged at one end of each cross brace (2), angle steel (4) transversely arranged is arranged at the other end of each cross brace (2), the angle steel (4) is arranged at the bottom of the fixed platform (1), a vertically arranged vertical rod (5) is further arranged between each inclined strut (3) and the fixed platform (1), a moving platform (6) capable of vertically lifting is arranged at one side position on the fixed platform (1), a first steel pipe (7) and a second steel pipe (8) which are longitudinally arranged are arranged between the moving platform (6) and the angle steel (4), two ends of the first steel pipe (7) and the second steel pipe (8) are arranged on the angle steel (4) and can move along the length direction of the angle steel (4), wherein the length of the moving platform (6) is smaller than that of the steel pipes, a folding cloth (9) is connected between the first steel pipe (7) and the second steel pipe (8), corresponding to the position of the mobile platform (6), a limiting plate (10) is arranged between the inclined strut (3) and the upright rod (5) at two ends, T-shaped sliding blocks (11) are arranged at two ends of the mobile platform (6), T-shaped sliding rails (12) matched with the T-shaped sliding blocks (11) are arranged at two ends of the limiting plate (10), the T-shaped sliding rails (12) are vertically arranged and are positioned at the bottom of the angle steel (4), when the first steel pipe (7) and the second steel pipe (8) are pulled out from the angle steel (4), the mobile platform (6) can be lowered onto the limiting plate (10) along the T-shaped sliding rails (12), two groups of steel pipe limiting devices are further arranged on each angle steel (4), each group of steel pipe limiting devices comprises a limiting sleeve (13) fixed at the bottom of the angle steel (4), a vertical sliding block (14) is arranged in the limiting sleeves (13) in a matched manner, a limiting rod (15) is arranged on the vertical sliding block (14), the limiting rod (15) can penetrate through the limiting sleeve (13) and the angle steel (4), a first spring (16) is installed at the bottom of the vertical sliding block (14), the first spring (16) always has a tendency of pushing the limiting rod (15) to extend into the angle steel (4), a door leaf (17) capable of being opened and closed is installed at the front end of the angle steel (4), a first steel pipe (7) is located between the door leaf (17) and one of the limiting rods (15), a second steel pipe (8) is located between the other limiting rod (15) and the cross brace (2), a foldable step device is installed between the inclined braces (3), the foldable step device comprises a first connecting rod (18) and a second connecting rod (19) which are longitudinally arranged, a first sliding groove (20) matched with the first connecting rod (18) and a second sliding groove (36) matched with the second connecting rod (19) are formed in the inner side of each inclined brace (3), a first flat plate (21) is fixedly installed on the first connecting rod (18), a second flat plate (22) is fixedly arranged on the second connecting rod (19), the first flat plate (21) and the second flat plate (22) are hinged through a first rotating shaft (23), the first rotating shaft (23) is positioned between the inclined struts (3), a positioning device is arranged at the upper side position of the first sliding chute (20), the positioning device can position the first connecting rod (18) in the first sliding chute (20) and corresponds to the position of the second flat plate (22), a bulge (24) is further arranged on the inclined struts (3), the bulge (24) is in contact with the second flat plate (22), so that the included angle between the first flat plate (21) and the second flat plate (22) is an obtuse angle, after the positioning device removes the limitation on the first connecting rod (18), the second connecting rod (19) can be lowered to the bottommost part of the second sliding chute (36), the first connecting rod (18) moves to the bottommost part in the first sliding chute (20), and the included angle between the first flat plate (21) and the second flat plate (22) is a right angle, still offer location cross slot (25) with first spout (20) looks UNICOM on bracing (3), location cross slot (25) are located the bottom of first spout (20), and first connecting rod (18) can stretch into in location cross slot (25), T type mounting groove (31) have been seted up to the bottom of fixed platform (1), and T type mounting groove (31) are arranged along the length direction of fixed platform (1), install T type briquetting (32) with T type mounting groove (31) matched with on bracing (2), the top of fixed platform (1) and moving platform (6) all is equipped with anti-skidding burr (33), positioner is including installing second pivot (26) on bracing (3), and limit baffle (27) are installed to second pivot (26) one side, and connecting plate (28) are installed to the opposite side of second pivot (26), are equipped with in limiting plate (10) and touch piece (29), second spring (30) are installed to the bottom that touches movable block (29), and second spring (30) have all the time to make and touch movable block (29) and stretch out the trend of limiting plate (10), touch movable block (29) and connecting plate (28) fixed connection, when second spring (30) are not compressed, limit baffle (27) are located the bottom of first connecting rod (18) and can restrict the removal of first connecting rod (18) in first spout (20), fall to limiting plate (10) back in moving platform (6), touch movable block (29) and move down compression second spring (30), drive limit baffle (27) and connecting plate (28) and take place to rotate, when limit baffle (27) rotate to first connecting rod (18) upper portion, first connecting rod (18) can freely fall in first spout (20).

2. The subway tunnel emergency evacuation platform of claim 1, wherein: a handle (34) is attached to the middle of the first steel pipe (7).

3. The subway tunnel emergency evacuation platform of claim 1, wherein: the top of the limiting rod (15) is provided with a hemispherical cambered surface (35).

4. The subway tunnel emergency evacuation platform of claim 1, wherein: the top of the T-shaped sliding rail (12) is provided with a bell mouth which is positioned at the bottom of the angle steel (4).