CN210105355U - Construction safety protection device for existing overhead line - Google Patents

Abstract

The utility model provides an existing line construction safety device strides on relates to the technical field who strides existing line construction on. The sliding block comprises basic assemblies which are arranged on two sides of an existing line respectively, a plurality of groups of protection assemblies which are arranged on two groups of basic assemblies in a bridging mode, and a first fixing piece used for fixing two adjacent groups of protection assemblies, wherein sliding assemblies are arranged between the basic assemblies and each group of protection assemblies, each group of sliding assemblies comprises a sliding rail arranged on each group of basic assemblies, a plurality of pulleys which are arranged at the bottom ends of the protection assemblies and can slide along the sliding rails are rotated, and the sliding block is arranged on the sliding rails and used for fixing the pulleys. The utility model discloses have the dismouting of being convenient for and save man-hour beneficial effect.

Description

Construction safety protection device for existing overhead line

Technical Field

The utility model belongs to the technical field of the technique of existing line construction of striding on, especially, relate to an existing line construction safety device strides on.

Background

The existing line refers to an originally built line, including a railway, an expressway, a subway and the like, and with the development of economy in China, the total mileage of the expressway, the subway and a high-speed rail also has a leap development, and with the increase of the mileage, all lines are inevitably crossed, and in the process of cross construction, part of construction sundries may fall to the operation area of the existing line, so that certain threat can be caused to the existing line, and the danger is high. When a new line is constructed to intersect with an existing line, in order to reduce the influence on the existing line, if the construction of the new line is carried out during the outage period of two to three hours every day of the existing line, the construction period is too long, the construction process of the whole new line is influenced, and if the existing line is directly shut down, the normal transportation of the existing line is influenced by all-weather construction, and the economic loss of the existing line is caused.

Chinese patent with publication number CN103225411B discloses an existing line protection canopy, include the support and build the ceiling on the support, the support includes two row at least support units, every support unit all includes a plurality of support posts, the pre-buried basis in support post's lower part, the welding of support post's bottom has first connecting steel plate, be provided with a plurality of preformed holes on the first connecting steel plate, pre-buried screw rod with preformed hole one-to-one in the basis, the pillar passes through screw rod and preformed hole fixed connection with the basis and is in the same place, the welding of support post's top has the third connecting plate. During the operation, when need with the support mounting on the basis, pass through screw rod threaded connection with support and basis in the preformed hole on first connecting steel plate, be connected support and basis.

The above prior art solutions have the following drawbacks: when being connected frame and basis, need be connected screw rod and preformed hole, and need align screw rod and preformed hole at this in-process, this process is comparatively wasted time.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an existing line construction safety device strides on, it has the dismouting of being convenient for and saves man-hour effect.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a go up existing line construction safety device of strideing, includes the basic subassembly that sets up respectively in existing line both sides, the crossover connection sets up in two sets of multiunit protection component on the basic subassembly to and be used for fixed adjacent two sets of protection component's first mounting, basic subassembly and every group all are provided with the subassembly that slides between the protection component, every group the subassembly that slides all including set up in every group slide rail on the basic subassembly, rotate set up in protection component bottom and can follow a plurality of pulleys that the slide rail slided, and set up in on the slide rail and be used for fixed the non slipping spur of pulley.

By adopting the technical scheme, the basic components are built along the two sides of the existing line, and when the basic components are built, the normal operation of the existing line cannot be influenced because the basic components are built on the two sides of the existing line; after the basic assembly is built, the slide rails are installed on the basic assembly along the arrangement direction of the existing line, and after the basic assembly and the slide rails are installed, the multiple groups of protection assemblies are placed on one side of the existing line. During the existing line is stopped, the protection assemblies are lifted by a crane and then placed on the sliding rails, the protection assemblies are pushed to a required position along the sliding rails, other protection assemblies are sequentially placed on the sliding rails, then the protection assemblies are pushed until the adjacent two groups of protection assemblies are in butt joint, finally the adjacent two groups of protection assemblies are fixed by the first fixing piece, and the anti-skid blocks are installed on the sliding rails to prevent the pulleys from sliding along the sliding rails. When needing to dismantle, with the crane with the protection component pull down can. The operation mode is simple in disassembly and assembly, working hours are saved, meanwhile, the protection assembly can slide along the sliding rail by arranging the sliding rail and the pulley, the crane can lift the protection assembly in a fixed place, the protection assembly does not need to be hoisted along the existing line when the protection assembly is installed, occupation of the site is reduced, construction operation can be continued under the condition that the crane cannot move, and the operation mode has high adaptability.

The utility model discloses further set up to: every group the basic subassembly is including fixed setting up a plurality of foundation columns that are located existing line one side on the road bed, the cross-over connection sets up in adjacent two basic crossbeam on the foundation column, and set up in each the strengthening rib of foundation column lateral wall, slide rail fixed connection in on the basic crossbeam.

Through adopting above-mentioned technical scheme, during the installation basic subassembly, be fixed in existing line both sides with a plurality of foundation columns, erect the basic crossbeam between two adjacent foundation columns in proper order again, after having erect the basic crossbeam alright be fixed in the basic crossbeam with the slide rail on. When the construction of basic components is carried out on two sides of the existing line, the normal operation of the existing line can not be interfered, the construction can be carried out in advance, when a new line is built to the intersection with the existing line, the protective components can be directly hoisted to the slide rail during the outage of the existing line, and the construction working hours during the outage of the existing line are effectively shortened.

The utility model discloses further set up to: every group the protection component is all including erectting in two sets of C font supporting framework on the basis subassembly, set up in the roof on supporting framework top, and set up in the C font protection piece of supporting framework periphery, the pulley rotate set up in the supporting framework bottom.

By adopting the technical scheme, when the protection component is installed, the support framework is used for supporting the protection part, and the support framework is arranged in a C shape, so that three sides of the existing line are protected, and the situation that sundries fall onto the existing line in the new line construction process and damage is caused to the operation of the existing line can be prevented; meanwhile, the support framework is arranged to be C-shaped, the C-shaped framework can be integrally manufactured during manufacturing, and the support framework has high stability.

The utility model discloses further set up to: the protection piece includes two-layer C font wire netting, presss from both sides and locates two-layerly the dense mesh net between the wire netting to and be used for with the protection piece is fixed in a plurality of second mounting on the support chassis.

Through adopting above-mentioned technical scheme, set up the protection piece into the three-layer, fix the close mesh net by two-layer wire netting, prevent that the close mesh net from being blown away by other external forces, the hole on the close mesh net is comparatively inseparable simultaneously, can prevent that less article from getting into existing line operation region.

The utility model discloses further set up to: the width of each pulley with be used for holding on the slide rail the width ratio of pulley is not more than 1:3, be close on the braced frame pulley department is provided with the direction subassembly, every group the direction subassembly include two rotate connect in the braced frame bottom just is the gag lever post that the splayed set up, rotate connect in each keep away from on the gag lever post the gyro wheel of braced frame one end, connect in two first compression spring between the gag lever post, and set up in the stopper of braced frame bottom, two the gag lever post is followed respectively the both sides setting of pulley roll direction.

Through adopting above-mentioned technical scheme, set up the width of slide rail into the width that is greater than the pulley, can be convenient for the crane with the quick butt joint of pulley on the slide rail, effectively practiced thrift construction man-hour. When the pulley is butted with the slide rail, namely when the protection assembly is lifted by a crane to descend downwards, the roller is contacted with the bottom wall of the slide rail at first, in the process that the protection assembly is gradually lowered by the crane, the two rollers roll towards the direction deviating from each other, namely, the two limiting rods rotate along the hinged parts with the supporting framework respectively, until the two rollers are butted with the two side walls of the slide rail respectively, when the two limiting rods rotate to the butt joint of the two side walls of the roller and the slide rail respectively, the limiting rods are butted with the limiting blocks simultaneously, so that the limiting rods are prevented from continuing to rotate towards the upper side, at the moment, the pulley is contacted with the bottom wall of the slide rail, and. Can be convenient for dock slide rail and pulley through setting up the direction subassembly, also can ensure simultaneously that the pulley is in the intermediate position of slide rail all the time when the pulley moves along the slide rail, promptly can prevent that the slide rail from sending out into the skew at the in-process of motion for ensure the seamless butt joint between two adjacent protection component, with improvement later stage operation personnel's operating efficiency.

The utility model discloses further set up to: and when the compression spring is in a normal state, one end of the barrier strip, which is far away from the hinge joint of the limiting rod, is inclined upwards.

Through adopting above-mentioned technical scheme, set up the blend stop and can prevent to rotate to falling the splayed because of two gag lever posts, and lead to the condition emergence that two gag lever posts of in-process that the crane transferred protective assembly can't be opened.

The utility model discloses further set up to: every group all be provided with multiunit drive assembly on the basis subassembly, and be located two sets of drive assembly on the basis subassembly is crisscross to be set up, every group drive assembly all including can dismantle connect in the mounting panel of basic crossbeam lateral wall, two rotate connect in band pulley on the mounting panel, along being on a parallel with pulley direction of motion sets up in the belt between two band pulleys, with arbitrary the motor that the band pulley is connected, and set up in be used for promoting on the belt the piece that pulls of braced frame motion, the both ends of braced frame both sides wall respectively are equipped with an response iron plate, every group the drive assembly both ends all are provided with the sensor, and are a plurality of the sensor, pull the piece with the motor all with set up in controller on the basis subassembly is linked together.

Through adopting above-mentioned technical scheme, when placing protection component on the slide rail, after the sensor senses the response iron plate, give the controller with signal transmission, the controller sends and makes respectively draw the instruction that piece and motor began the motion, draw the piece alright be connected with protection component, by motor drive band pulley rotation, drive belt motion when the band pulley rotates, alright drive during the belt motion draw piece and protection component synchronous forward motion, when this group of protection component moves to the next group of drive assembly department of protection component opposite side, the motor stop motion of preceding group, drive protection component by another group of drive assembly and continue forward motion, until promoting this group of protection component to required position. Because the construction line is longer, the driving assemblies are arranged into a plurality of groups of driving assemblies for sequentially relaying and pushing, the pushing efficiency can be improved, and enough power is ensured to drive the protection assembly to move forwards.

The utility model discloses further set up to: the basis crossbeam is gone up along the protection component direction of motion is provided with the guide rail, it is connected with the guide block to slide on the guide rail, draw the piece include one end fixed connection in on the belt, other end fixed connection in keysets on the guide block, and set up in electro-magnet on the keysets, the electro-magnet with the controller intercommunication.

By adopting the technical scheme, after the electromagnet receives the signal sent by the controller, a magnetic field is generated and is mutually adsorbed with the induction iron block, and when the electromagnet moves, the protection assembly can be driven to synchronously move. When the existing line normally operates, the operator can install the driving assembly on the basic assembly, and the normal operation of the existing line cannot be influenced.

The utility model discloses further set up to: the response iron plate is T shape, just the response iron plate includes integrative horizontal segment and the vertical section that sets up, the T shape activity hole has been seted up on the support chassis, the activity hole is including horizontal cavity and the vertical chamber that the intercommunication set up, perpendicular to is all followed to vertical section and horizontal segment the protection component direction of motion slide connect in vertical cavity and horizontal cavity, the horizontal segment lateral wall with be provided with second compression spring between the horizontal cavity inner wall, just second compression spring's flexible direction is on a parallel with the direction of motion of response iron plate.

By adopting the technical scheme, during operation, when the electromagnet moves to the induction iron block, the magnetic field of the electromagnet drives the induction iron block to slide along the direction perpendicular to the movement direction of the protection assembly until the electromagnet and the induction iron block are mutually adsorbed. The movement of the induction iron block is guided by the movable hole, and the induction iron block is driven to the original position after the electromagnet is separated from the induction iron block by the second compression spring.

To sum up, the utility model discloses a beneficial technological effect does:

1. the rapid butt joint between the protection assembly and the foundation assembly is realized by arranging the sliding assembly, so that the assembly and disassembly are convenient, and the construction time is effectively shortened;

2. the construction process of the early-stage foundation assembly can be carried out during the operation of the existing line, so that the influence degree on the normal operation of the existing line is reduced, and meanwhile, the construction period is effectively shortened;

3. the guide assembly is arranged to prevent the pulley from deviating when sliding along the sliding rail, so that seamless butt joint of two adjacent groups of protection assemblies is ensured;

4. the protection assemblies are sequentially relayed and pushed by arranging the plurality of groups of driving assemblies, so that the pushing effect is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of the sliding assembly of the present invention.

Fig. 4 is a schematic structural diagram of the driving assembly of the present invention.

Fig. 5 is a schematic sectional view of the plane a-a in fig. 4.

In the figure, 1, a base component; 11. a base column; 12. a base beam; 121. mounting grooves; 13. reinforcing ribs; 2. a guard assembly; 21. a support framework; 22. a guard; 221. a wire mesh; 222. a dense mesh net; 23. a second fixing member; 231. locking screws; 232. a clamping block; 233. a card slot; 3. a slipping component; 31. a slide rail; 32. a pulley; 33. anti-skid blocks; 34. a support plate; 35. a pin; 351. a threaded segment; 352. locking the nut; 4. a drive assembly; 41. mounting a plate; 42. a pulley; 43. a belt; 44. a motor; 45. a sensor; 46. a traction member; 461. an adapter plate; 462. an electromagnet; 47. a guide rail; 48. a guide block; 5. existing lines; 6. a first fixing member; 7. a guide assembly; 71. a limiting rod; 72. a roller; 73. a first compression spring; 74. a limiting block; 75. blocking strips; 8. induction of iron blocks; 81. a horizontal segment; 82. a vertical section; 83. a second compression spring; 9. a movable hole; 91. a horizontal cavity; 92. a vertical cavity.

Detailed Description

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

Referring to fig. 1, for the utility model discloses a stride existing line construction safety device on, including setting up respectively in the basic subassembly 1 of existing line 5 both sides, the multiunit protection component 2 on two sets of basic subassemblies 1 is set up in the cross-over connection, and be used for the first mounting 6 of fixed adjacent two sets of protection component 2, basic subassembly 1 and every group protection component 2 between all be provided with the subassembly 3 that slides, all be provided with multiunit drive assembly 4 on every group basic subassembly 1, and be located the crisscross setting of drive assembly 4 on two sets of basic subassemblies 1, the welding of clearance department of adjacent two sets of protection component 2 is provided with the steel sheet (not shown in the figure), operating personnel can stand on the track during the welding steel sheet, can avoid operating personnel to carry out high altitude construction.

Referring to fig. 1, each foundation assembly 1 includes a plurality of foundation columns 11 fixed to a roadbed on one side of an existing line 5, a foundation beam 12 disposed across two adjacent foundation columns 11, and a reinforcing rib 13 fixedly connected to a side wall of each foundation column 11.

Referring to fig. 1 and 2, each set of protection components 2 includes a C-shaped supporting framework 21 erected on the two sets of base components 1, a top plate (not shown) disposed at the top end of the supporting framework 21, and a C-shaped protection member 22 disposed at the periphery of the supporting framework 21, where the protection member 22 includes two layers of C-shaped wires 221, a dense mesh 222 sandwiched between the two layers of wires 221, and a plurality of second fixing members 23 for fixing the protection member 22 on the supporting framework 21.

Referring to fig. 1 and 2, the second fixing element 23 includes a locking screw 231 threadably connected to the supporting framework 21, and a latch 232 welded to a nut of the locking screw 231, and a slot 233 formed in a side wall of the latch 232 and matched with a single wire of the wire mesh 221.

Referring to fig. 1 and 3, each group of sliding assemblies 3 includes a sliding rail 31 disposed on each group of base assemblies 1, a plurality of pulleys 32 rotatably disposed at the bottom of the supporting frame 21 and capable of sliding along the sliding rail 31, and an anti-slip block 33 disposed on the sliding rail 31 and used for fixing the pulleys 32, the anti-slip block 33 is fixed to the sliding rail 31 by screws, the cross section of the sliding rail 31 in the vertical direction is C-shaped, the sliding rail 31 is fixedly connected to the base beam 12, the ratio of the width of each pulley 32 to the width of the sliding rail 31 for accommodating the pulley 32 is not greater than 1:3, and the ratio of the width of the pulley 32 to the width of the sliding rail 31 for accommodating the pulley 32 in this embodiment is 1: 5. Support plates 34 fixedly connected to the bottom wall of the supporting framework 21 are arranged on two sides of the movement direction of the pulley 32, pins 35 are arranged through the two support plates 34, threaded sections 351 are arranged at two ends of each pin 35, locking nuts 352 used for fixing the pins 35 are connected to the two threaded sections 351 in a threaded mode, the pins 35 axially penetrate through the pulley 32 along the pulley 32, and the pulley 32 is rotatably connected with the pins 35.

Referring to fig. 1 and 3, the supporting frame 21 bottom wall is provided with the guide assembly 7 near each pulley 32, each guide assembly 7 includes two rotation connecting limiting rods 71 connected to the bottom of the supporting frame 21 and arranged in a splayed shape, the rotation connecting rollers 72 connected to each limiting rod 71 and far away from one end of the supporting frame 21, the two ends of each compression spring 73 are welded between the two limiting rods 71, the two limiting rods 74 are arranged on the supporting frame 21 bottom wall, and the two limiting rods 71 are respectively arranged along the two sides of the rolling direction of the pulley 32. Any limiting rod 71 in each group of guide assemblies 7 is welded with a barrier strip 75 just facing the side wall of the other limiting rod 71, the length of the barrier strip 75 is larger than the length of the connecting line of the hinge points of the two limiting rods 71 and the supporting framework 21 respectively, and when the compression spring is in a normal state, one end of the barrier strip 75, which is far away from the hinge point of the limiting rod 71, is inclined upwards.

Referring to fig. 4, the side wall of the base beam 12 is provided with a plurality of mounting slots 121 at intervals, each set of driving units 4 includes a mounting plate 41 detachably connected to the side wall of the base beam 12, two pulleys 42 rotatably connected to the mounting plate 41, a belt 43 disposed between the two pulleys 42 in a direction parallel to the movement direction of the pulley 32, a motor 44 connected to any one of the pulleys 42, and a traction member 46 arranged on the belt 43 for pushing the support frame 21 to move, wherein a guide rail 47 is arranged on the base beam 12 along the moving direction of the protection assembly 2, the guide rail 47 is connected with a guide block 48 in a sliding manner, the traction member 46 comprises an adapter plate 461 with one end fixedly connected to the belt 43 and the other end fixedly connected to the guide block 48, and the electromagnet 462 is arranged on the adapter plate 461, the electromagnet 462 is communicated with the controller, the motor 44 is a servo motor, and the mounting plate 41 is clamped and arranged in the mounting hole.

Referring to fig. 4 and 5, two ends of two side walls of the supporting framework 21 are respectively provided with a T-shaped induction iron block 8, the end of each group of driving components 4 on the base component 1 is provided with a sensor 45, the sensors 45, the traction piece 46 and the motor 44 are all communicated with a controller arranged on the base component 1, and the sensor 45 is a photoelectric sensor. Response iron plate 8 includes integrative horizontal segment 81 and the vertical section 82 that sets up, the movable hole 9 of T shape is seted up to the support chassis 21 lateral wall, movable hole 9 is including horizontal cavity 91 and the vertical cavity 92 that the intercommunication set up, vertical section 82 and horizontal segment 81 all slide along perpendicular to protective assembly 2 direction of motion and connect in vertical cavity 92 and horizontal cavity 91, the welding has second compression spring 83 between horizontal segment 81 lateral wall and the horizontal cavity 91 inner wall, and the flexible direction of second compression spring 83 is on a parallel with the direction of motion of response iron plate 8.

The implementation principle of the embodiment is as follows: firstly, arranging the basic components 1 at two sides of an existing line 5; when the foundation assembly 1 is constructed, the foundation columns 11 can be planted on both sides of the existing line 5 during the normal operation of the existing line 5, and the plurality of foundation beams 12 are sequentially erected on the foundation columns 11 after the foundation columns 11 are planted.

After the foundation assembly 1 is laid, the slide rail 31 is fixed on the foundation beam 12 by using expansion screws. After planting basic unit 1, install drive assembly 4 in the mounting groove 121 of basic crossbeam 12 lateral wall, when installing drive assembly 4, with mounting panel 41 joint in mounting groove 121, reuse the screw with mounting panel 41 be fixed in basic crossbeam 12 on can.

After the base assembly 1 and the driving assembly 4 are installed, each set of the protection assemblies 2 can be spliced into one at one side of the existing line 5, when the protection assemblies 2 are spliced, the protection member 22 is lifted by a crane and placed on the support framework 21, the edge of the wire net 221 is fixed on the support framework 21 by the second fixing member 23, when the wire net 221 is fixed by the second fixing member 23, the wire net 221 is clamped in the clamping groove 233, and the locking screw 231 is screwed into the support framework 21 to fix the wire net 221.

After the protection components 2 are spliced into one piece, the first group of protection components 2 are hoisted to the slide rail 31 by a crane during the period of the existing line 5 being stopped, and the two limiting rods 71 are gradually opened towards two sides in the process of lowering the protection components 2 until the rollers 72 are abutted against two side walls of the slide rail 31.

After the protection assembly 2 is placed on the sliding rail 31, if a certain deviation exists between the induction iron block 8 and the sensor 45, the protection assembly 2 is manually pushed to a position where the induction iron block 8 is parallel to the sensor 45 by an operator, after the sensor 45 senses the induction iron block 8, the signal is transmitted to the controller, the controller respectively sends out a signal which enables the motor 44 and the electromagnet 462 to start to operate, after the electromagnet 462 receives the signal sent by the controller, a magnetic field is generated, the induction iron block 8 can slide towards the electromagnet 462 until the induction iron block 8 and the electromagnet 462 are mutually adsorbed, at the moment, the second compression spring 83 is in a stretching state, after the electromagnet 462 tightly adsorbs the induction magnetic block, the motor 44 drives the belt pulley 42 connected with the induction magnetic block to rotate, when the belt pulley 42 rotates, the belt 43 and the other belt pulley 42 synchronously rotate, when the belt pulley 42 moves, the adapter plate 461 moves, the transfer plate 461 drives the electromagnet 462 and the protection component 2 to move forward synchronously.

When the other induction iron block 8 in the first group of protection assemblies 2 is parallel to the sensor 45 in the next group of driving assemblies 4, the electromagnet 462 in the first group of driving assemblies 4 is powered off, the electromagnet 462 in the next group of driving assemblies 4 drives the protection assemblies 2 to move forwards continuously, and because the two rows of driving assemblies 4 on both sides of the existing line 5 are arranged in a staggered mode in sequence, the driving assemblies 4 can be conveyed to a required position in a step-by-step mode. After the first group of protection components 2 are pushed to the designated position, the rest protection components 2 are sequentially pushed to the designated position according to the driving mode.

After each group of protection assemblies 2 is pushed to a required position, the antiskid blocks 33 are locked at the front side and the rear side of the pulleys 32 by screws to prevent the pulleys 32 from moving, then the steel plates are welded at the gaps of the two adjacent support frameworks 21 to prevent sundries during construction from flying into the operation area of the existing line 5 from the gaps of the two adjacent groups of protection assemblies 2, and finally the first fixing piece 6 is welded between the two adjacent support frameworks 21 to ensure the overall stability of the protection assemblies 2.

After installing multiunit protective component 2, can prevent to fall into protective component 2 by the article that the top fell, or by the article that the side was flown through, avoid making the train receive the damage during existing line 5 operation, it has higher safety protection performance.

When a new line is built, the protection components 2 need to be disassembled, during disassembly, the steel plate and the first fixing piece 6 are cut open by a cutting machine, then the protection components 2 are sequentially pushed to the original position by the driving component 4, and finally the protection components 2 are hung back to one side of the existing line 5 by a crane. After the protective component 2 is hoisted to the original position by a crane, the foundation component 1 is dismantled.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (9)

1. The utility model provides an existing line construction safety device strides on, includes the basic subassembly (1) that sets up respectively in existing line (5) both sides, and the crossover connection sets up in two sets of multiunit protective assembly (2) on basic subassembly (1) to and be used for fixed adjacent two sets of first mounting (6) of protective assembly (2), its characterized in that: basis subassembly (1) and every group all be provided with between protection component (2) subassembly (3) that slides, every group subassembly (3) that slides all including setting up in every group slide rail (31) on the basis subassembly (1), rotate set up in protection component (2) bottom just can follow a plurality of pulleys (32) that slide rail (31), and set up in on slide rail (31) and be used for fixing non slipping spur (33) of pulley (32).

2. The safety protection device for construction over existing lines as claimed in claim 1, wherein: every group basic subassembly (1) sets up including fixed a plurality of basic stands (11) that are located existing line (5) one side on the road bed, the cross-over connection sets up in adjacent two basic crossbeam (12) on basic stand (11), and set up in each strengthening rib (13) of basic stand (11) lateral wall, slide rail (31) fixed connection in on basic crossbeam (12).

3. The safety protection device for construction over existing lines as claimed in claim 2, wherein: every group protection component (2) all including erect in two sets ofly support frame (21) of the C font on basic subassembly (1), set up in the roof on support frame (21) top, and set up in C font protection piece (22) of support frame (21) periphery, pulley (32) rotate set up in support frame (21) bottom.

4. The existing line construction safety device of claim 3, wherein: the protection piece (22) comprises two layers of C-shaped wire nets (221), a dense mesh net (222) clamped between the two layers of the wire nets (221), and a plurality of second fixing pieces (23) used for fixing the protection piece (22) on the supporting framework (21).

5. The existing line construction safety device of claim 3, wherein: each the width of pulley (32) with be used for holding on slide rail (31) the width ratio of pulley (32) is not more than 1:3, be close on support skeleton (21) pulley (32) department is provided with direction subassembly (7), every group direction subassembly (7) including two rotate connect in support skeleton (21) bottom and be gag lever post (71) that the splayed set up, rotate connect in each keep away from on gag lever post (71) gyro wheel (72) of support skeleton (21) one end, connect in two first compression spring (73) between gag lever post (71), and set up in support skeleton (21) bottom stopper (74), two gag lever post (71) are followed respectively pulley (32) roll direction's both sides set up.

6. The existing line construction safety device of claim 5, wherein: and a barrier strip (75) is arranged on the side wall of any limiting rod (71) in each group of guide assemblies (7) opposite to the other limiting rod (71), the length of the barrier strip (75) is greater than the length of a connecting line of hinge points of the two limiting rods (71) and the supporting framework (21), and when the first compression spring (73) is in a normal state, one end, far away from the hinge point of the limiting rod (71), of the barrier strip (75) is inclined upwards.

7. The existing line construction safety device of claim 3, wherein: every group all be provided with multiunit drive assembly (4) on basic subassembly (1), and be located two sets of drive assembly (4) on basic subassembly (1) are crisscross to be set up, every group drive assembly (4) all including can dismantle connect in mounting panel (41) of basic crossbeam (12) lateral wall, two rotate connect in band pulley (42) on mounting panel (41), along being on a parallel with pulley (32) direction of motion sets up belt (43) between two band pulleys (42), and arbitrary motor (44) that band pulley (42) are connected, and set up in be used for promoting on belt (43) support pulling member (46) of skeleton (21) motion, the both ends of supporting skeleton (21) both sides wall respectively are equipped with an response iron plate (8), every group drive assembly (4) both ends all are provided with sensor (45), and are a plurality of sensor (45), The traction piece (46) and the motor (44) are communicated with a controller arranged on the basic assembly (1).

8. The safety protection device for construction over existing lines as claimed in claim 7, wherein: follow on the basis crossbeam (12) protection component (2) direction of motion is provided with guide rail (47), it is connected with guide block (48) to slide on guide rail (47), pull piece (46) including one end fixed connection in on belt (43), other end fixed connection in keysets (461) on guide block (48), and set up in electromagnet (462) on keysets (461), electromagnet (462) with the controller intercommunication.

9. The safety protection device for construction over existing lines as claimed in claim 7, wherein: the response iron plate (8) is T shape, just response iron plate (8) is including integrative horizontal segment (81) and vertical section (82) that set up, T shape activity hole (9) have been seted up on supporting framework (21), activity hole (9) are including horizontal cavity (91) and vertical cavity (92) that the intercommunication set up, the perpendicular to is all followed in vertical section (82) and horizontal segment (81) protection component (2) direction of motion slide connect in vertical cavity (92) and horizontal cavity (91), horizontal segment (81) lateral wall with be provided with second compression spring (83) between horizontal cavity (91) the inner wall, just the flexible direction of second compression spring (83) is on a parallel with the direction of motion of response iron plate (8).

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