CN111005756B

CN111005756B - Protection device for construction of movable rail transit

Info

Publication number: CN111005756B
Application number: CN201911331644.8A
Authority: CN
Inventors: 王建波; 王昆; 赵波; 柴要争; 许君良; 雷帅星; 张万平; 李波
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-21
Filing date: 2019-12-21
Publication date: 2021-03-12
Anticipated expiration: 2039-12-21
Also published as: CN111005756A

Abstract

The invention relates to a protective device for movable rail transit construction, which effectively solves the problem that the safety of operators cannot be ensured because the operators easily fall from a high place when the top wall of a subway tunnel is overhauled in the prior art; the technical scheme comprises the following steps: this protector is used in construction of portable track traffic makes when the operation personnel falls from the maintenance case through setting up the loading board, arc bounding wall, triggers the buffer board and expandes and be used for catching the maintainer, and still installing the expansion board on the buffer board in addition, roll-off in the buffer board when the buffer board expandes completely, further increased the region of accepting to the maintainer, greatly reduced the direct risk of falling in the tunnel subaerial of maintainer.

Description

Protection device for construction of movable rail transit

Technical Field

The invention relates to the technical field of protective devices, in particular to a protective device for movable rail transit construction.

Background

Rail transit, such as ordinary iron, high-speed rail, light rail, subway and the like, plays an important role in the traffic field, and ensures the normal operation of the rail transit, and depends on the construction, maintenance, repair and other work of related facilities of the rail transit, which all relate to personnel safety, especially related work carried out in a subway tunnel, the subway tunnel wall bears the heavy pressure of a soil layer above the subway tunnel wall, and whether the safety performance of the subway tunnel wall is directly related to the safe operation of the subway or not, so the subway tunnel wall needs to be regularly detected and maintained to prevent the overall protective performance of the tunnel wall from being reduced due to cracks;

when detecting an area of the inner wall of the subway tunnel below the height of a maintainer, the maintainer can detect cracks of the inner wall of the subway tunnel without other auxiliary mechanisms, but when detecting the top wall of the subway tunnel, the height of the maintainer needs to be lifted by a lifting machine, when detecting the top wall of the subway tunnel at present, a maintenance platform is usually built on a track detection vehicle, then a maintenance operator stands on the maintenance platform to detect the top wall of the subway tunnel, and when detecting one area, the track detection vehicle drives the maintenance platform to continuously push forward to implement the detection of the top wall of the next section of tunnel;

however, the existing maintenance platform has lower safety protection performance, so that when a maintenance person overhauls the top wall of the tunnel, the maintenance person often falls off the maintenance platform due to lack of certain safety protection measures, and serious threat is caused to life safety of the maintenance person;

in view of the above, we provide a mobilizable protector for track traffic construction for solve to be in the easy problem that exceeds and fall when overhauing the operation to tunnel roof to the maintainer of operation that exceeds.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the movable protective device for the rail transit construction, the protective device for the rail transit construction is provided with the bearing plate and the arc-shaped enclosing plate, so that when an operator falls from the maintenance box, the buffer plate is triggered to be unfolded and used for receiving the maintenance personnel, the expansion plate is further arranged on the buffer plate, when the buffer plate is completely unfolded, the expansion plate slides out of the buffer plate, the bearing area for the maintenance personnel is further increased, and the risk that the maintenance personnel directly fall on the ground of the tunnel is greatly reduced.

The specific technical scheme is as follows:

a protective device for movable rail transit construction comprises a rail detection vehicle, wherein an overhaul box is vertically and slidably mounted on the rail detection vehicle, a lifting mechanism is mounted on the rail detection vehicle, and the overhaul box is lifted by the lifting mechanism, and is characterized in that the overhaul box is divided into an upper bin and a lower bin by a partition plate, the upper end surface of the partition plate is connected with a bearing plate which is vertically and slidably mounted on the overhaul box through a telescopic spring, limiting devices for limiting the bearing plate are arranged at the upper end and the lower end of the bearing plate in the overhaul box, arc-shaped surrounding plates are respectively rotatably mounted on the longitudinal side wall and the transverse side wall in the overhaul box above the partition plate, buffer plates are respectively rotatably mounted on the longitudinal side wall and the transverse side wall in the overhaul box below the partition plate, energy storage springs are respectively connected between the arc-shaped surrounding plates, the buffer plates and the overhaul box, a limiting plate corresponding to the buffer plates is vertically, be connected with spacing spring between limiting plate and the maintenance case, be equipped with the positioner who is used for the limiting plate location on the maintenance incasement lateral wall, the arc bounding wall is connected with transmission and the limiting plate that transmission drive corresponds with it carries out vertical migration, be equipped with in buffer board through buffer spring be connected with it the gliding mounting complex expansion board and the buffer board and be used for locking dead locking device to the expansion board, maintenance bottom of the case portion is equipped with respectively with locking device matched with unlocking device, when the buffer board was contacted by release and unlocking device and locking device for the outside roll-off of expansion board.

Preferably, the bottom of the maintenance box is transversely installed at interval fixed mounting has the slide bar and the track detects and installs on the car with the vertical sliding fit's of slide bar slide cartridge, transversely slide on the slide cartridge have be equipped with on locking block and the slide bar with locking block matched with locking hole, be connected with locking spring between locking block and the slide cartridge, vertical slidable mounting has lifting plate and expansion plate to be connected with lifting spring between, the fixed pressure sensor that is provided with on the expansion plate diapire, the equal electrically connected of pressure sensor, lifting mechanism has controlling means, outwards withdraws from through controlling means control locking block when pressure sensor detects pressure to make lifting mechanism action drive maintenance box move down.

Preferably, the locking block is connected with a locking spring, an iron sheet is fixed on one side of the locking block, an electromagnet is fixed on the sliding barrel at a position corresponding to the iron sheet, the electromagnet is connected in series in a stabilized voltage supply loop arranged on the track detection vehicle, and the stabilized voltage supply loop is controlled by the control device.

Preferably, the arc bounding wall is rotated through the primary shaft and is installed in maintenance case and energy storage spring one end and connect in the maintenance case at the primary shaft other end, and transmission includes that worm and worm meshing with the coaxial pivoted of primary shaft have the rotation to install the worm wheel in the maintenance case, and the worm wheel has the rotation to install the gear in the maintenance case through the drive of band pulley group, be equipped with on the lateral wall on the limiting plate and mesh a plurality of dentition with the gear that corresponds with it mutually.

Preferably, positioner includes that slidable mounting has triangle sloping block in the outer one end fixed mounting of maintenance box is arranged in to transmission pole and transmission pole on the maintenance box lateral wall, be connected with the surplus spring between triangle sloping block and the maintenance box, the transmission pole is located to be equipped with on the maintenance box one end fixed mounting have L shape pole and the limiting plate lateral wall with L shape pole horizontal part matched with locating hole.

Preferably, stop device includes that vertical interval sets up the rectangle frame in being located baffle top maintenance case, is located the top sliding contact cooperation between rectangle frame and the triangle sloping block up end.

Preferably, the buffer board rotates through the secondary shaft and installs in maintenance case and energy storage spring one end and connect in the maintenance case in the secondary shaft other end, slidable mounting has damping plate and is connected with damping spring between damping plate and the buffer board on the buffer board, the damping plate up end sets up to the inclined plane, the inclined plane setting mode is by the buffer board free one end to being close to secondary shaft one end height and reducing gradually.

Preferably, locking device includes that vertical slidable mounting is equipped with on the L shaped plate and the buffer board of buffer board with L shaped plate matched with slide opening, be equipped with on the expansion board with L shaped plate vertical portion complex rectangular hole and be connected with the dead spring of lock between L shaped plate and the buffer board, be equipped with on L shaped plate horizontal portion fixedly connected with and buffer board sliding fit's T shaped plate and the buffer board with T shaped plate matched with through-hole.

Preferably, the unlocking device comprises an L-shaped unlocking rod which is fixedly installed at the bottom of the maintenance box and corresponds to the T-shaped plate, and the vertical part of the L-shaped unlocking rod is provided with a fillet.

Preferably, the lifting mechanism is including setting up in slide and the slide of track detection vehicle and maintenance case diapire and the slide internal transverse interval moves and install the slider, rotate between the upper and lower two sets of sliders that are located the homonymy and install two lifting rods and be located the installation of two lifting rod central part normal running fit of homonymy, rotate on the track detection vehicle and install and slide screw thread fit's lifting lead screw and lifting lead screw through motor drive.

The beneficial effects of the technical scheme are as follows:

(1) according to the protective device for the movable track traffic construction, the bearing plate and the arc-shaped enclosing plate are arranged, so that when an operator falls from the maintenance box, the buffer plate is triggered to expand and is used for receiving the maintenance personnel, the expansion plate is further arranged on the buffer plate, when the buffer plate is completely expanded, the expansion plate slides out of the buffer plate, the bearing area for the maintenance personnel is further increased, and the risk that the maintenance personnel directly fall on the ground of the tunnel is greatly reduced;

(2) in this scheme, we have the lifter plate at the vertical slidable mounting in the expansion board, when the maintainer that falls from the maintenance incasement falls to the expansion board on (show that the maintainer falls to keeping away from maintenance case position this moment, have the subaerial risk of dropping once more), push down the lifter plate and act on the pressure sensor who sets up on the expansion board diapire, pressure sensor signals to controlling means, make the locking block withdraw from in the locking hole and driving motor action pass through lifting mechanism drive maintenance case downstream under controlling means's effect, with reduce maintenance case height, the maintainer's that has further guaranteed to drop on the expansion board safety.

Drawings

FIG. 1 is a schematic illustration of the invention with the service box not raised;

FIG. 2 is a schematic view of the invention with the maintenance box raised;

FIG. 3 is a schematic view of the track inspection vehicle of the present invention operating in a tunnel;

FIG. 4 is a schematic top view of the extension board of the present invention sliding out of the buffer board;

FIG. 5 is a schematic top view of the expansion board of the present invention shown not sliding out of the cushioning board;

FIG. 6 is a schematic front view of the relationship between the track inspection vehicle and one lateral side of the tunnel;

FIG. 7 is a schematic view of the relationship between the maintenance box and the track inspection vehicle after the tunnel is removed according to the present invention;

FIG. 8 is a schematic view of the relationship between the arc-shaped coamings and the bumper plate after the track inspection vehicle and the maintenance box are removed;

FIG. 9 is a schematic view of the present invention with the carrier plate separated from the inspection box;

FIG. 10 is a schematic view of the internal structure of the inspection box of the present invention, partially in section;

FIG. 11 is a schematic view of the matching relationship between the limiting plate, the transmission device and the positioning device according to the present invention;

FIG. 12 is a schematic view of the positioning device of the present invention separated from the service box;

FIG. 13 is a schematic view of another perspective matching relationship of the inspection transmission device, the positioning device and the limiting plate according to the present invention;

FIG. 14 is a schematic view showing a relationship between a first circular plate and a second circular plate after the vacuum cylinder is removed;

FIG. 15 is a cross-sectional view of the buffer board with the internal expansion board in cooperation therewith;

FIG. 16 is a schematic view of the present invention with the extension plate, the buffer plate, and the shock absorbing plate separated;

FIG. 17 is a schematic view of the present invention from another perspective after the extension plate, the buffer plate and the damping plate are separated;

FIG. 18 is a schematic view of the present invention with the lifter plate separated from the extender plate;

FIG. 19 is a schematic view of the L-shaped lock release lever of the present invention in mating relationship with a T-shaped plate;

FIG. 20 is a schematic view of the locking block and the locking hole of the present invention.

In the figure: the track inspection vehicle comprises a track inspection vehicle 1, a tunnel 2, an inspection box 3, a telescopic spring 4, a partition plate 5, a bearing plate 6, an arc-shaped coaming 7, a buffer plate 8, an energy storage spring 9, a limiting plate 10, a limiting hole 11, a limiting spring 12, a buffer spring 13, an expansion plate 14, a sliding rod 15, a sliding cylinder 16, a locking block 17, a locking hole 18, a locking spring 19, a lifting plate 20, a lifting spring 21, a first shaft 22, a worm 23, a worm wheel 24, a gear 25, a pulley set 26, a tooth system 27, a transmission rod 28, a triangular oblique block 29, a surplus spring 30, an L-shaped rod 31, a positioning hole 32, a rectangular frame 33, a second shaft 34, a damping plate 35, a damping spring 36, an L-shaped plate 37, a sliding hole 38, a rectangular hole 39, a dead locking spring 40, a T-shaped plate 41, a through hole 42, an L-shaped unlocking rod 43, a slide way 44, a.

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 20. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1, this embodiment provides a movable protective device for track traffic construction, as shown in fig. 1, including a track inspection vehicle 1, and an inspection box 3 vertically slidably mounted on the track inspection vehicle 1, fig. 1 is a schematic view of the track inspection vehicle 1 traveling in a tunnel 2, fig. 2 is a schematic view of the track inspection vehicle 1 in an inspection state (at this time, the inspection box 3 is in a raised state), a lifting mechanism is mounted on the track inspection vehicle 1, and the inspection box 3 is lifted by the lifting mechanism, and is characterized in that, as shown in fig. 9, the inspection box 3 is divided into an upper chamber and a lower chamber by a partition plate 5, the upper end surface of the partition plate 5 is connected with a bearing plate 6 vertically slidably mounted on the inspection box 3 through a telescopic spring 4, and limiting devices for limiting the bearing plate 6 are disposed at the upper end and the lower end of the bearing plate 6 in the inspection box 3, when an inspector works on, the self gravity of a maintainer acts on the bearing plate 6 and presses the telescopic spring 4 downwards, so that the lower end face of the bearing plate 6 abuts against the limiting device below the bearing plate, when the maintainer on the bearing plate 6 falls off accidentally, the weight of the bearing plate 6 is reduced (equivalent to the weight of one maintainer is reduced), the bearing plate 6 slides upwards along the maintenance box 3 under the elastic force of the telescopic spring 4, and the upper end face of the bearing plate 6 abuts against the limiting device above the bearing plate;

referring to fig. 9, arc-shaped coamings 7 (the upper end of the arc-shaped coamings 7 is fixedly connected with an arc-shaped board which floats outwards) are respectively rotatably mounted on the longitudinal side wall and the transverse side wall in the maintenance box 3 above the partition board 5, buffer boards 8 are respectively rotatably mounted on the longitudinal side wall and the transverse side wall in the maintenance box 3 below the partition board 5, energy storage springs 9 are respectively connected between the arc-shaped coamings 7, the buffer boards 8 and the maintenance box 3, and the energy storage springs 9 matched with the arc-shaped coamings 7 enable the two arc-shaped coamings 7 at the opposite sides to have a trend of rotating in opposite directions (we respectively fix a baffle sheet matched with the arc-shaped coamings 7 on the inner side of the maintenance box 3, and the arc-shaped coamings 7 are abutted against the baffle sheet under the action of the energy storage springs 9, and the baffle, the two arc-shaped enclosing plates 7 positioned on the opposite side have the tendency of rotating in opposite directions, and the energy storage springs 9 matched with the buffer plates 8 ensure that the two buffer plates 8 positioned on the opposite side have the tendency of rotating in opposite directions when the buffer plates 8 are only acted by the energy storage springs 9, namely, the two buffer plates 8 positioned on the opposite side have the tendency of rotating and unfolding outwards;

a limiting plate 10 corresponding to a buffer plate 8 is vertically and slidably installed in an inspection box 3, a limiting hole 11 matched with the limiting plate 10 is formed in the free end of the buffer plate 8, in an initial state, the limiting plate 10 is located in the limiting hole 11 corresponding to the limiting plate and positions the buffer plate 8, so that the buffer plates 8 rotatably installed on the peripheral side walls of the inspection box 3 are all in a closed state (shown in figure 1, namely not in an unfolded state), a limiting spring 12 is connected between the limiting plate 10 and the inspection box 3, preferably, a positioning device for positioning the limiting plate 10 is arranged on the inner side wall of the inspection box 3, when an inspector falls off the inspection box 3, namely, the instep of the inspector leaves a bearing plate 6 and the body of the inspector is pressed on an arc-shaped plate of a floating part of one arc-shaped surrounding plate 7, at the moment, because the weight on the bearing plate 6 works normally, the weight of a maintainer is reduced, at the moment, the bearing plate 6 slides upwards along the maintenance box 3 under the elastic force action of the telescopic spring 4, and when the bearing plate 6 touches the limiting device positioned above the bearing plate, the bearing plate just acts on the positioning device for positioning the limiting plate 10, so that the positioning device releases the positioning and locking of the limiting plate 10 (the limiting plate 10 is in a free state), because the arc-shaped enclosing plate 7 is connected with the transmission device and the limiting plate 10 is in the free state at the moment, the arc-shaped enclosing plate 7 drives the corresponding limiting plate 10 to vertically move through the transmission device under the pressure action of the body of the fallen maintainer, so that the limiting plate 10 is withdrawn from the corresponding limiting hole 11 (at the moment, the limiting spring 12 connected with the limiting plate 10 is compressed to store energy), the buffer plate 8 corresponding to the limiting plate 10 is in the free state, and then, the buffer plate 8 rotates outwards under the action of the energy storage spring 9 corresponding to the buffer plate and expands (the buffer plate 8 expanding outwards forms a bearing area for the maintainers), at the moment, the maintainers falling from the bearing plate 6 fall on the buffer plate 8 to prevent the maintainers from directly falling from the bearing plate 6 to the ground, and the buffer plate 8 buffers the falling maintainers to a certain degree, so that the damage to the bodies of the maintainers during falling can be reduced, when the maintainers do not fall from the bearing plate 6, namely, the maintainers are in normal work on the bearing plate 6, because the limiting plate 10 is inserted into the limiting hole 11 corresponding to the limiting plate 10 and the limiting plate 10 is in a positioned state under the action of the positioning device, at the moment, the positioning device for positioning the limiting plate 10 is not triggered (the maintainers are always positioned on the bearing plate 6, so that the bearing plate 6 is not in contact with the limiting device above the bearing plate), at the moment, even if the body of a maintainer leans against the arc-shaped coaming 7, the arc-shaped coaming 7 cannot be driven to rotate outwards (the limiting plate 10 is positioned, and the arc-shaped coaming 7 cannot drive the limiting plate 10 to move vertically through the transmission device), namely, when the maintainer is always positioned on the bearing plate 6 and performs maintenance operation, the arc-shaped coaming 7 rotatably installed on the peripheral side wall at the upper end of the maintenance box 3 cannot rotate outwards and unfold, and only when the maintainer falls off from the bearing plate 6, the arc-shaped coaming 7 can rotate outwards and unfold under the pressure of the body of the maintainer to release the positioning of the buffer plate 8 positioned below the arc-shaped coaming 7, so that the buffer plate 8 unfolds to support the falling maintainer;

it is noted in this embodiment that any maintenance lifting mechanism has its specified weight bearing range, i.e. the maintenance lifting mechanism has a maximum value of the weight bearing, we set the elastic parameters of the selected extension spring 4 according to the weight range that the maintenance lifting mechanism can bear, and set the positional relationship between the two position-limiting devices and the bearing plate 6, so that when a person falls on the bearing plate 6 (when a person falls, the bearing plate 6 slides upwards under the action of the extension spring 4 to contact with the position-limiting device above it and acts on the positioning device, and when two persons fall, because the bearing plate 6 is also moved upwards to the height of the position by the position-limiting device), the bearing plate 6 slides upwards to contact with the position-limiting device above it and the bearing plate 6 acts on the positioning device, the positioning device is enabled to release the positioning of the limiting plate 10, and only the detection of the top wall of the tunnel 2 is involved in the scheme, so that the weight change on the bearing plate 6 is limited to the occurrence of the condition that a maintainer falls off in the detection process, when the device is not used, no load is carried on the bearing plate 6, and at the moment, the upper end surface of the bearing plate 6 is abutted against the limiting device above the bearing plate;

referring to fig. 4, preferably, an expansion plate 14 slidably mounted and matched with the buffer plate 8 is connected to the buffer plate 8 through a buffer spring 13, and a locking device for locking the expansion plate 14 is arranged in the buffer plate 8 (when the buffer plate 8 is not rotated and unfolded outwards, the expansion plate 14 is contracted in the buffer plate 8 and is locked by the locking device, and the buffer spring 13 is in a compressed state), referring to fig. 10, unlocking devices matched with the locking device are respectively arranged at the bottom of the maintenance box 3, when the buffer plate 8 is released and the unlocking devices are contacted with the locking device, that is, when the buffer plate 8 is completely unfolded under the action of the energy storage spring 9 (at the moment, the side wall of the buffer plate 8 is abutted against the bottom wall of the maintenance box 3, as shown in fig. 10), the unlocking device arranged at the bottom of the maintenance box 3 and corresponding to the buffer plate 8 unlocks the locking device, the expansion plate 14 slides outwards under the action of the elastic force of the buffer spring 13, so that the bearing range of falling maintainers is further enlarged, and the safety protection performance of the device is better.

In embodiment 2, on the basis of embodiment 1, referring to fig. 7, slide rods 15 are fixedly installed at the bottom of an inspection box 3 at intervals in the transverse direction, and a slide cylinder 16 which is vertically slidably engaged with the slide rods 15 is installed on a rail inspection vehicle 1 (the slide rods 15 and the slide cylinder 16 which are engaged with each other make the inspection box 3 move vertically under the action of a lifting mechanism, so as to complete the lifting process of the inspection box 3), referring to fig. 2, a locking block 17 is transversely slidably installed on the slide cylinder 16, a locking hole 18 which is engaged with the locking block 17 is formed in the slide rod 15, a locking spring 19 is connected between the locking block 17 and the slide cylinder 16, a lifting plate 20 is vertically slidably installed in an expansion plate 14, a lifting spring 21 is connected between the lifting plate 20 and the expansion plate 14, a pressure sensor is fixedly installed on the bottom wall of the expansion plate 14, and both the pressure sensor and the lifting mechanism are electrically connected with a control device (, the micro control processor is used for receiving a pressure change signal detected by the pressure sensor, and is internally integrated with a control unit module), and the micro control processor controls the movement of the locking block 17 and the action of the lifting mechanism according to the signal sent by the pressure sensor;

that is, when the maintenance person falling from the loading plate 6 falls on the lifting plate 20 vertically slidably mounted on the expansion plate 14, the lifting plate 20 moves downward and compresses the lifting spring 21 due to the gravity of the maintenance person, so that the bottom wall of the lifting plate 20 abuts against the pressure sensor fixedly mounted on the bottom wall of the expansion plate 14, when the pressure sensor detects the pressure from the lifting plate 20, the microcontroller sends a signal to the microcontroller, and at this time, the microcontroller first controls the locking block 17 to withdraw outwards from the locking hole 18 matched with the locking block (at this time, the locking spring 19 connected between the locking block 17 and the sliding cylinder 16 is compressed and stored with energy), and then, immediately controls the mechanism to move and drive the maintenance box 3 to move downward, so as to reduce the height of the maintenance box 3, and avoid the maintenance person falling on the expansion plate 14 from sliding down to the ground again, because, when the maintainer drops on extension board 14, itself has certain from extension board 14 the emergence once more and falls the risk, through reducing the height of maintenance box 3 this moment, can reduce to minimum to the bodily injury of maintainer to whole action process all takes place under the control of little control processor, when the maintainer takes place to fall, can take corresponding safeguard measure at the very first time.

Embodiment 3, on the basis of embodiment 2, how the micro-control processor controls the locking block 17 to withdraw from the locking hole 18 matched with the locking block, which will be described in detail in this embodiment, we fix an iron sheet on the side of the locking block 17 connected with the locking spring 19 and fix an electromagnet on the slide cylinder 16 corresponding to the iron sheet, the electromagnet is connected in series with a regulated power supply circuit arranged on the track detection vehicle 1 and the regulated power supply circuit is controlled by the micro-control processor;

when the protection device is in a normal state, namely when the maintainer falls off, the stabilized voltage supply loop is in a disconnected state under the control of the micro-control processor, namely the locking block 17 is not attracted by magnetic force from the electromagnet (the electromagnet is not electrified and does not have electromagnetic force), when the maintenance box 3 is not lifted by the lifting mechanism, the locking block 17 abuts against the wall of the sliding rod 15 which is vertically and slidably installed in the sliding cylinder 16 (at the moment, the locking spring 19 is in a compressed state), when the maintenance box 3 is lifted upwards by the lifting mechanism and the maintenance box 3 is lifted to a preset height, the locking hole 18 arranged on the sliding rod 15 is moved to a position corresponding to the locking block 17, the locking block 17 is inserted into the corresponding locking hole 18 under the action of the locking spring 19 to realize the positioning of the sliding rod 15, the locking block 17 is arranged and the positioning of the sliding rod 15 is realized, and the pressure of the maintenance box 3 on the lifting mechanism in the operation process is reduced (the gravity of the maintenance box 3 is avoided All act on the lifting mechanism), and the loss of the lifting mechanism is reduced;

when the maintainer on the maintenance box 3 falls and falls onto the expansion plate 14, the maintainer falling onto the expansion plate 14 has the risk of secondary falling, therefore, when the maintainer falls onto the expansion plate 14, the lifting plate 20 is pressed down and the pressure sensor arranged on the bottom wall of the expansion plate 14 detects the pressure from the lifting plate 20, the pressure sensor sends a signal to the microcontroller, the microcontroller firstly controls the connection of a stabilized voltage supply loop, the electromagnet is electrified to generate electromagnetic force, the locking block 17 is withdrawn from the corresponding locking hole 18 by absorbing the iron sheet fixed on the locking block 17, then the microcontroller controls the lifting mechanism to move to drive the maintenance box 3 to move downwards, further the height of the maintenance box 3 from the ground is reduced, and the injury to the maintainer caused by secondary falling is avoided, and the pressure sensor, the micro-control processor and the stabilized voltage power supply loop are electrically connected with a storage battery set arranged on the track detection vehicle 1 through leads.

Embodiment 4, on the basis of embodiment 1, referring to fig. 11, the arc-shaped enclosing plate 7 is rotatably installed on the maintenance box 3 through a first shaft 22, and one end of the energy storage spring 9 is connected to the first shaft 22 and the other end is connected to the maintenance box 3, the energy storage spring 9 is arranged such that when the arc-shaped enclosing plate 7 is in the state shown in fig. 11, two arc-shaped enclosing plates 7 at opposite sides tend to rotate in opposite directions, and we use a baffle fixed on the inner wall of the maintenance box 3 to resist the acting force of the energy storage spring 9 on the arc-shaped enclosing plates 7 (the baffle is not shown in the figure), referring to fig. 10, the transmission device comprises a worm 23 which rotates coaxially with the first shaft 22, the worm 23 is engaged with a worm wheel 24 rotatably installed in the maintenance box 3, referring to fig. 11, the worm wheel 24 is driven by a pulley set 26 to be rotatably installed in the maintenance box, a plurality of tooth systems 27 meshed with the corresponding gears 25 are arranged on the upper side wall of the limit plate 10;

when the maintainer carries out normal detection operation to 2 roof in tunnel on loading board 6, the terminal surface is contradicted on the stop device who is located its below under the loading board 6, and limiting plate 10 inserts in the spacing hole 11 that corresponds with it, realize the location effect to buffer board 8, promptly, if the maintainer does not fall from loading board 6, when the maintainer health pressure is on arc bounding wall 7, be unable make arc bounding wall 7 pivoted, because this moment positioner fixes a position limiting plate 10, when the maintainer falls from loading board 6 suddenly, this moment is accompanied with a series of processes: firstly, the body of a maintainer leans against the arc-shaped coaming 7, then the feet of the maintainer leave the bearing plate 6, at the moment, the whole body of the maintainer completely abuts against the arc-shaped plate of the floating part outside the arc-shaped coaming 7, because the feet of the maintainer leave the bearing plate 6, at the moment, the bearing plate 6 slides upwards under the action of the telescopic spring 4, the upper end surface of the bearing plate 6 abuts against the limiting device above the bearing plate, meanwhile, the positioning device is in contact with the bearing plate 6, the bearing plate 6 releases the positioning of the positioning device on the limiting plate 10, at the moment, the limiting plate 10 is in a free state, and when the feet of the maintainer leave the bearing plate 6, the bearing plate 6 moves upwards quickly under the action of the telescopic spring 4 and releases the positioning of the positioning device on the limiting plate 10, and;

when the position limiting plate 10 loses the positioning of the positioning device, at this time, the arc-shaped enclosing plate 7 is pressed by the body of the maintenance person, and then rotates outwards around the first shaft 22 (it is set that the acting force of the energy storage spring 9 connected between the first shaft 22 and the maintenance box 3 on the first shaft 22 is smaller than the pressing force of the maintenance person on the arc-shaped enclosing plate 7, that is, when the maintenance person falls and presses the body on the arc-shaped enclosing plate 7, the arc-shaped enclosing plate 7 can be easily forced to rotate outwards around the first shaft 22), at this time, along with the outward rotation of the arc-shaped enclosing plate 7, the worm 23 rotating coaxially with the first shaft 22 is synchronously driven to rotate, the worm 23 drives the worm wheel 24 engaged with the worm 23 and drives the gear 25 rotatably installed in the maintenance box 3 to rotate through the belt pulley set 26 (as shown in fig. 13), the gear 25 drives the position limiting plate 10 to move upwards through the plurality of gear sets 27 fixed on the side wall of the position limiting Withdraw from in the position hole 11, when the limiting plate 10 was withdrawn from spacing hole 11, buffer board 8 no longer received limiting plate 10 to its location this moment, then under the energy storage spring 9 effect of complex with it, outwards rotated and expand, finally be in as shown in figure 6 state, buffer board 8 that expand this moment has constituted the platform of accepting to falling the maintainer, and the effectual maintainer who falls from loading board 6 has directly dropped the emergence of the subaerial condition.

Embodiment 5, on the basis of embodiment 1, referring to fig. 11, the positioning device includes a transmission rod 28 slidably mounted on the sidewall of the maintenance box 3, and a triangular block 29 is fixedly mounted at one end of the transmission rod 28 outside the maintenance box 3, and a margin spring 30 is connected between the triangular block 29 and the maintenance box 3, referring to fig. 13, an L-shaped rod 31 is fixedly mounted at one end of the transmission rod 28 inside the maintenance box 3, and a positioning hole 32 matched with the horizontal portion of the L-shaped rod 31 is disposed on the sidewall of the limiting plate 10, in an initial state, that is, when the maintenance person does not fall off, the horizontal portion of the L-shaped rod 31 is inserted into the positioning hole 32 disposed on the sidewall of the limiting plate 10 and realizes the positioning of the limiting plate 10, when the maintenance person falls off from the bearing plate 6, the bearing plate 6 slides upwards along the inner wall of the maintenance box 3 under the action of the extension spring 4 and touches the limiting device above the bearing, referring to fig. 11, in the process of the bearing plate 6 moving upwards along the inner wall of the maintenance box 3, the upper end surface of the bearing plate 6 first touches the inclined surface part of the triangular inclined block 29, and presses the triangular inclined block 29 to slide into the maintenance box 3, so that when the bearing plate 6 touches the limiting device above the bearing plate, the bearing plate 6 just completely presses the triangular inclined block 29 fixedly connected with the transmission rod 28 into the maintenance box 3 and compresses the residual spring 30, and the horizontal part of the L-shaped rod 31 is synchronously driven to withdraw from the positioning hole 32 on the limiting plate 10 along with the movement of the triangular inclined block 29, that is, the positioning of the limiting plate 10 is released.

Embodiment 6, on the basis of embodiment 5, as shown in fig. 9, the limiting device includes a rectangular frame 33 vertically spaced from and disposed in the inspection box 3 above the partition board 5, when the device is performing normal operation, a maintainer and a detection tool are carried on the bearing board 6, and the total weight of the maintainer and the detection tool is within a lifting weight range defined by the lifting mechanism, at this time, the lower end surface of the bearing board 6 abuts against the rectangular frame 33 below the bearing board, as shown in fig. 11 and 12, the rectangular frame 33 above and the upper end surface of the triangular oblique block 29 are in sliding contact and fit, when the bearing board 6 moves upwards until the upper end surface abuts against the rectangular frame 33 above, the bearing board 6 just completely presses the triangular oblique block 29 into the inspection box 3, and at this time, the positioning of the limiting board 10 is released.

Example 7, on the basis of example 1, referring to fig. 14, the buffer plate 8 is rotatably mounted on the maintenance box 3 through a second shaft 34, one end of the energy storage spring 9 is connected to the second shaft 34 and the other end of the energy storage spring is connected to the maintenance box 3, when the buffer plate 8 is positioned and is in a free state, the energy storage spring 9 connected to the second shaft 34 can drive the two buffer plates 8 which are opposite to each other to rotate outwards and make the buffer plate 8 finally in the position shown in fig. 10 (at this time, one side wall of the buffer plate 8 is abutted against the bottom wall of the maintenance box 3), referring to fig. 14, a shock absorption plate 35 is slidably mounted on the buffer plate 8, and a shock absorption spring 36 is connected between the shock absorption plate 35 and the buffer plate 8, when a falling maintenance worker falls onto the shock absorption plate 35, the impact force on the body of the falling maintenance worker is weakened by compressing the shock absorption spring 36, further guarantee maintainer's safety, better, we set up the up end of buffer board 35 into the inclined plane (this inclined plane inclination can set up to between 40-50), the inclined plane setting mode is by the free one end of buffer board 8 to being close to the height of second axle 34 one end and reducing gradually, makes when the maintainer drops on buffer board 35 through the setting up of inclined plane, can roll in to maintenance box 3 along the inclined plane that sets up, and it is shown in reference to figure 10, promptly, prevents to drop to the maintainer on buffer board 8 and takes place the emergence of the condition of falling once more.

Embodiment 8, on the basis of embodiment 1, referring to fig. 16, the locking device comprises an L-shaped plate 37 vertically slidably mounted on a buffer plate 8, the buffer plate 8 is provided with a sliding hole 38 matched with the L-shaped plate 37, the expansion plate 14 is provided with a rectangular hole 39 matched with the vertical part of the L-shaped plate 37, a locking spring 40 is connected between the L-shaped plate 37 and the buffer plate 8, in an initial state, that is, when the buffer plate 8 is not rotated outwards and opened, the expansion plate 14 is contracted to be located in the corresponding buffer plate 8, a sliding cavity 49 in sliding fit with the expansion plate 14 is arranged in the buffer plate 8, as shown in fig. 18, and a buffer spring 13 is connected between the bottom wall of the sliding cavity 49 and the expansion plate 14 (as shown in fig. 14), and the vertical part of the L-shaped plate 37 is inserted into the rectangular hole 39 arranged on the expansion plate 14, at this time, the expansion plate 14 is located under the action of the L-shaped plate 37, when the buffer plate 8 is in a positioned state to a position shown in figure 10, namely, when the buffer plate 8 is about to rotate to a horizontal state under the action of the energy storage spring 9 corresponding to the buffer plate, the unlocking device which is arranged on the bottom of the maintenance and corresponds to the corresponding buffer plate 8 just abuts against the lower end face of the T-shaped plate 41 fixedly connected with the L-shaped plate 37 and is accompanied with the continuous rotation of the buffer plate 8, so that when the buffer plate 8 rotates to the horizontal state, the unlocking device just withdraws the L-shaped plate 37 upwards from the rectangular hole 39 through the T-shaped plate 41 contacted with the unlocking device and compresses the locking spring 40, when the vertical part of the L-shaped plate 37 is withdrawn from the rectangular hole 39 arranged on the expansion plate 14, the expansion plate 14 slides outwards out of the sliding cavity 49 under the action of the buffer spring 13 and is in a state shown in figure 4, the receiving area for the fallen maintenance personnel is increased, further reducing the probability that the maintainer falls to the ground directly from the bearing plate 6, we set a through hole 42 on the buffer plate 8, which is matched with the T-shaped plate 41, that is, the unlocking device contacts the lower end face of the T-shaped plate 41 through the through hole 42 and drives the L-shaped plate 37 fixedly connected with the T-shaped plate to move upwards, so that the L-shaped plate is withdrawn from the rectangular hole 39, and the positioning of the expansion plate 14 is released.

Embodiment 9, on the basis of embodiment 8, referring to fig. 10, the unlocking means comprises an L-shaped unlocking lever 43 fixedly installed at the bottom of the service box 3 and corresponding to the T-shaped plate 41, when the buffer plate 8 is to be rotated to the horizontal state, that is, when the vertical portion of the L-shaped lock release lever 43 just contacts the lower end surface of the T-shaped plate 41 until the buffer plate 8 is completely rotated to the horizontal state, the L-shaped unlocking bar 43 pushes the L-shaped plate 37 fixedly connected with the L-shaped unlocking bar upwards from the rectangular hole 39 just through the T-shaped plate 41 (as shown in fig. 19), so as to unlock the expansion plate 14, preferably, the L-shaped unlocking bar 43 is rounded at the vertical part, when the L-shaped release lever 43 contacts the lower end surface of the T-shaped plate 41, the force of the L-shaped release lever 43 on the T-shaped plate 41 is smoother, and the process of withdrawing the L-shaped plate 37 from the rectangular hole 39 is smoother.

Embodiment 10, on the basis of embodiment 1, as shown in fig. 7, the lifting mechanism includes a slide 44 disposed on bottom walls of the track inspection vehicle 1 and the inspection box 3, and a slide 45 is slidably installed in the slide 44 at a transverse interval, as shown in fig. 2, two lifting rods 46 are rotatably installed between two sets of upper and lower slides 45 located on the same side, as shown in fig. 8, central portions of the two lifting rods 46 located on the same side are rotatably installed, a lifting lead screw 47 in threaded fit with the slide 45 is rotatably installed on the track inspection vehicle 1, and the lifting lead screw 47 is driven by a motor 48, the motor 48 controller is electrically connected with the micro-control processor, when the inspection box 3 needs to be inspected, the motor 48 controller is controlled by the micro-control processor so that the motor 48 drives the inspection box 3 to a predetermined height, and then the motor 48 stops working (the motor 48 controller controls the motor 48 to lift the inspection box 3 according to a set direction through active working, The integrated circuit works at speed, angle and response time, the micro control processor controls the starting and stopping of the motor 48 through the motor 48 controller), when the pressure sensor arranged on the inner bottom wall of the expansion board 14 sends a signal to the micro control processor, the micro control processor firstly controls the locking block 17 to withdraw from the locking hole 18 corresponding to the locking block, then sends a signal to the motor 48 controller, and controls the motor 48 to act to drive the maintenance box 3 to move downwards, so that the height of the maintenance box 3 is reduced;

in this embodiment there are two motors 48 which are synchronized under the control of the micro-controller processor and drive the rotation of the lift screw 47.

When the scheme is implemented specifically: when the maintainer performs normal detection operation on the bearing plate 6, the lower end face of the bearing plate 6 is pressed to abut against the rectangular frame 33 positioned below the bearing plate 6, at the moment, the arc-shaped coaming 7 abuts against the baffle (the baffle is not shown in the figure) fixedly arranged on the inner wall of the maintenance box 3 under the action of the energy storage spring 9 corresponding to the arc-shaped coaming 7, when the maintainer positioned on the bearing plate 6 falls, namely, the body of the maintainer firstly abuts against one of the arc-shaped coaming 7, at the moment, the two feet of the maintainer do not leave the bearing plate 6, when the two feet of the bearing plate leave the bearing plate 6, the bearing plate 6 slides upwards along the maintenance box 3 under the action of the telescopic spring 4 and finally abuts against the rectangular frame 33 positioned above the bearing plate, meanwhile, the bearing plate 6 extrudes the triangular inclined block 29 into the maintenance box 3 and releases the limit of the limit plate 10, because the body of the maintainer is pressed against the outward-floating part of the arc-shaped enclosing plate 7, the arc-shaped enclosing plate 7 rotates outwards around the first shaft 22, the worm 23 which rotates coaxially with the first shaft 22 is driven to rotate, the limiting plate 10 is withdrawn from the limiting hole 11 through the matching of the gear 25 and the gear system 27, and then the buffer plate 8 rotates outwards under the action of the energy storage spring 9 corresponding to the buffer plate and is unfolded to support the fallen maintainer;

if the maintainer falls onto the damping plate 35, the maintainer is prompted to roll towards the inside of the maintenance box 3 due to the inclined arrangement of the upper end face of the damping plate 35, the occurrence of a secondary falling situation of the maintainer is avoided, if the maintainer falls onto the expansion plate 14 (at the moment, the risk of the secondary falling of the maintainer is very high), the pressure sensor arranged in the expansion plate 14 is triggered by pressing the lifting plate 20 to send a signal to the microcontroller and the stabilized voltage power supply loop is switched on, so that the electromagnet is electrified to generate electromagnetic force, the locking block 17 fixed with the iron sheet is withdrawn from the corresponding locking hole 18, the locking of the sliding rod 15 is released, then the microcontroller controls the motor 48 to act and drives the maintenance box 3 to move downwards, the height of the maintenance box 3 is reduced, and the maintainer is prevented from falling off the expansion plate 14 again;

when the device is reset, when the buffer plate 8 is in a completely unfolded state, firstly, the expansion plate 14 is manually pushed into the sliding cavity 49, then, the buffer plate 8 is manually rotated, the L-shaped unlocking rod 43 is separated from the T-shaped plate 41, at the moment, the L-shaped plate 37 is inserted into the rectangular hole 39 arranged on the expansion plate 14 again under the action of the locking spring 40, so that the expansion plate 14 is positioned, the buffer plate 8 is continuously rotated, so that when the buffer plate 8 is to be closed (namely, when the free end of the buffer plate 8 moves to the position close to the position of the limit plate 10), the arc-shaped coaming 7 is manually rotated outwards, the limit plate 10 is driven to move upwards into the maintenance box 3 through the matching of the worm 23, the worm wheel 24, the belt pulley set 26 and the gear set 25, and when the buffer plate 8 is manually closed completely, at the moment, the limit hole 11 arranged on the buffer door just moves to the position corresponding to the limit plate 10, at the moment, the arc-shaped enclosing plate 7 is loosened, the arc-shaped enclosing plate 7 rotates inwards under the action of the energy storage spring 9 corresponding to the arc-shaped enclosing plate and drives the limiting plate 10 to be inserted into the limiting hole 11, and finally the positioning effect on the buffer plate 8 is achieved.

According to the protective device for the movable track traffic construction, the bearing plate 6 and the arc-shaped coaming 7 are arranged, so that when an operator falls from the maintenance box 3, the buffer plate 8 is triggered to expand and is used for receiving the maintenance personnel, the expansion plate 14 is further arranged on the buffer plate 8, and when the buffer plate 8 is completely expanded, the expansion plate 14 slides out of the buffer plate 8, so that the bearing area for the maintenance personnel is further increased, and the risk that the maintenance personnel directly fall on the ground of the tunnel 2 is greatly reduced;

in this scheme, we have lifter plate 20 at vertical slidable mounting in expansion board 14, when the maintainer that falls from in maintenance box 3 falls to expansion board 14 on (the maintainer falls to and is far away from maintenance box 3 position this moment, has the risk of dropping subaerial once more), push down lifter plate 20 and act on the pressure sensor who sets up on expansion board 14 diapire, pressure sensor sends signal to controlling means, make locking block 17 withdraw from locking hole 18 and driving motor 48 act on and drive maintenance box 3 through the lifting mechanism and move down under controlling means's effect, with the reduction maintenance box 3 height, the safety of the maintainer that has further guaranteed to drop on expansion board 14.

The above description is only for the purpose of illustrating the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various modifications conforming to the spirit of the present invention are within the scope of the present invention.

Claims

1. Portable protector for track traffic construction, vertical slidable mounting goes up including track inspection car (1) and overhauls case (3), install lifting mechanism and overhaul case (3) through lifting mechanism lifting on track inspection car (1), its characterized in that, overhaul case (3) and divide into two upper and lower bins through baffle (5), baffle (5) up end is connected with vertical slidable mounting through expanding spring (4) and is located bearing board (6) of overhauing case (3) and overhauls case (3) and be equipped with at both ends from top to bottom in bearing board (6) and be used for spacing stop device to bearing board (6), is located longitudinal both sides wall, horizontal both sides wall rotate respectively and install arc bounding wall (7) in overhaul case (3) of baffle (5) top, be located longitudinal both sides wall, both sides wall in overhaul case (3) of baffle (5) below, The buffer plates (8) are respectively rotatably installed on two transverse side walls, energy storage springs (9) are respectively connected between the arc-shaped coaming plates (7), the buffer plates (8) and the maintenance box (3), limiting plates (10) corresponding to the buffer plates (8) are vertically and slidably installed in the maintenance box (3), free ends of the buffer plates (8) are provided with limiting holes (11) matched with the limiting plates (10), limiting springs (12) are connected between the limiting plates (10) and the maintenance box (3), a positioning device used for positioning the limiting plates (10) is arranged on the inner side wall of the maintenance box (3), the arc-shaped coaming plates (7) are connected with a transmission device, the transmission device drives the corresponding limiting plates (10) to vertically move, expansion plates (14) matched with the buffer plates in a sliding installation manner are connected in the buffer plates (8) through buffer springs (13), and locking devices used for locking the expansion plates (14) are arranged in the buffer plates (8), the bottom of the maintenance box (3) is respectively provided with an unlocking device matched with the locking device, and when the buffer plate (8) is released and the unlocking device is contacted with the locking device, the expansion plate (14) slides outwards.

2. The movable protective device for the rail transit construction according to claim 1, wherein slide rods (15) are fixedly installed at the bottom of the maintenance box (3) at intervals in the transverse direction, a slide cylinder (16) which is vertically matched with the slide rods (15) in a sliding manner is installed on the rail detection vehicle (1), locking blocks (17) are transversely slid on the slide cylinder (16), locking holes (18) matched with the locking blocks (17) are formed in the slide rods (15), locking springs (19) are connected between the locking blocks (17) and the slide cylinder (16), a lifting plate (20) is vertically slid in the expansion plate (14), a lifting spring (21) is connected between the lifting plate (20) and the expansion plate (14), a pressure sensor is fixedly arranged on the bottom wall of the expansion plate (14), the pressure sensor and the lifting mechanism are both electrically connected with a control device, when the pressure sensor detects pressure, the locking blocks (17) are controlled to be withdrawn outwards by the control device, and the lifting mechanism is enabled to act to drive the maintenance box (3) to move downwards.

3. The movable protective device for the rail transit construction as claimed in claim 2, wherein the locking block (17) is connected with a locking spring (19), one side of the locking spring is fixed with an iron sheet, an electromagnet is fixed on the sliding barrel (16) at a position corresponding to the iron sheet, the electromagnet is connected in series with a stabilized voltage power supply circuit arranged on the rail detection vehicle (1), and the stabilized voltage power supply circuit is controlled by a control device.

4. The movable protective device for the track traffic construction according to claim 1, wherein the arc-shaped enclosing plate (7) is rotatably installed on the maintenance box (3) through a first shaft (22), one end of the energy storage spring (9) is connected to the other end of the first shaft (22) and is connected to the maintenance box (3), the transmission device comprises a worm (23) which coaxially rotates with the first shaft (22), a worm wheel (24) rotatably installed in the maintenance box (3) is meshed with the worm (23), the worm wheel (24) is driven by a pulley group (26) to be provided with a gear (25) rotatably installed in the maintenance box (3), and a plurality of tooth systems (27) meshed with the gear (25) corresponding to the limiting plate (10) are arranged on the side wall of the limiting plate (10).

5. The protective device for the movable track traffic construction according to claim 1, wherein the positioning device comprises a transmission rod (28) slidably mounted on the side wall of the maintenance box (3), the transmission rod (28) is fixedly mounted at one end outside the maintenance box (3) and is provided with a triangular inclined block (29), a surplus spring (30) is connected between the triangular inclined block (29) and the maintenance box (3), the transmission rod (28) is located in the maintenance box (3) and is fixedly mounted at one end with an L-shaped rod (31), and a positioning hole (32) matched with the horizontal part of the L-shaped rod (31) is formed in the side wall of the limiting plate (10).

6. The movable protective device for the rail transit construction as claimed in claim 5, wherein the limiting device comprises a rectangular frame (33) which is vertically arranged in the maintenance box (3) above the partition plate (5) at intervals, and the rectangular frame (33) above is in sliding contact fit with the upper end face of the triangular oblique block (29).

7. The movable protective device for the track traffic construction according to claim 1, wherein the buffer plate (8) is rotatably installed on the maintenance box (3) through a second shaft (34), one end of the energy storage spring (9) is connected to the second shaft (34) and the other end of the energy storage spring is connected to the maintenance box (3), the buffer plate (8) is slidably installed with a damping plate (35), a damping spring (36) is connected between the damping plate (35) and the buffer plate (8), the upper end face of the damping plate (35) is set to be an inclined face, and the inclined face is set in a mode that the height of the buffer plate (8) gradually decreases from the free end to the end close to the second shaft (34).

8. The protective device for the movable track traffic construction according to claim 1, wherein the locking device comprises an L-shaped plate (37) vertically slidably mounted on the buffer plate (8), a sliding hole (38) matched with the L-shaped plate (37) is formed in the buffer plate (8), a rectangular hole (39) matched with the vertical portion of the L-shaped plate (37) is formed in the expansion plate (14), a locking spring (40) is connected between the L-shaped plate (37) and the buffer plate (8), a T-shaped plate (41) slidably matched with the buffer plate (8) is fixedly connected to the horizontal portion of the L-shaped plate (37), and a through hole (42) matched with the T-shaped plate (41) is formed in the buffer plate (8).

9. The movable protective device for the rail transit construction as claimed in claim 8, wherein the unlocking device comprises an L-shaped unlocking rod (43) which is fixedly installed at the bottom of the maintenance box (3) and corresponds to the T-shaped plate (41), and the vertical part of the L-shaped unlocking rod (43) is rounded.

10. The movable protective device for the track traffic construction according to claim 1, wherein the lifting mechanism comprises a slide way (44) arranged on the bottom walls of the track detection vehicle (1) and the maintenance box (3), slide blocks (45) are transversely installed in the slide way (44) in a sliding mode at intervals, two lifting rods (46) are installed between an upper group of slide blocks (45) and a lower group of slide blocks (45) on the same side in a rotating mode, the two lifting rods (46) on the same side are installed in a rotating mode, the center portions of the two lifting rods (46) on the same side are installed in a rotating mode in a matched mode, a lifting lead screw (47) in threaded fit with the slide blocks (45) is installed on the track detection vehicle (1) in a rotating.