Subway track laying device and construction method thereof

Abstract

The invention discloses a subway track laying device and a construction method thereof, and relates to the technical field of subway track construction. The subway track laying device comprises a movable base, a fixed frame is fixed to the movable base, two fixed plates are oppositely fixed to the top of the movable base, a first lead screw is arranged between the two fixed plates, two movable frames are arranged on the first lead screw in a threaded mode, and clamping assemblies are arranged on the movable frames, so that a subway track to be laid is conveniently clamped and fixed; and the lifting assembly is arranged on the fixing frame and matched with the clamping assembly, so that the metro rail which is clamped can be conveniently adjusted to move up and down, the metro rail can be conveniently placed, adjustment and laying of the metro rail are achieved, the workload of workers is greatly relieved, and the construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of subway track construction, in particular to a subway track laying device and a construction method thereof. BACKGROUND

[0002] The subway is a rapid, large-capacity, electric traction track transportation built in the city. The train runs on a fully enclosed line. The line in the central urban area is basically set in the underground tunnel. The line outside the central urban area is generally set on the elevated bridge or the ground. The subway is a city rail transit system covering various underground and above-ground road rights, high density and high capacity.

[0003] Among them, the subway track laying is an important link in subway construction. In the prior art, when laying the subway track, the crane is usually used to lift the subway track or the transport vehicle is used to transport the subway track to be laid to the designated position. After the subway track is laid down, the position of the subway track is adjusted manually. It is time-consuming and laborious, which seriously affects the construction progress. Moreover, due to the long length and large weight of the subway track, the labor intensity is large when adjusting it manually, which increases the work burden of the workers.

[0004] To solve the above problems, we design a subway track laying device and a construction method thereof. SUMMARY

[0005] To solve the above technical problems, the present application is realized by the following technical scheme: The present application is a subway track laying device, comprising a mobile base, a fixed frame is fixed on the mobile base, two fixed plates are oppositely fixed on the top of the mobile base, a first lead screw is arranged between the two fixed plates, two movable frames are threadedly arranged on the first lead screw, a second bevel gear is fixedly sleeved on the first lead screw, a first bevel gear is meshed on the upper side of the second bevel gear, a clamping assembly is arranged on the movable frame, a lifting assembly is arranged on the fixed frame, the lifting assembly and the clamping assembly are mutually matched, and the clamping assembly comprises: A rectangular plate is arranged between the two adjacent sliding blocks, a U-shaped frame is arranged on the lower side of the rectangular plate, two connecting plates are fixed between the top of the U-shaped frame and the rectangular plate, and a limiting clamping structure is arranged on the U-shaped frame.

[0006] The limiting and clamping structure comprises a first cylinder, the first cylinder is arranged at the top of the U-shaped frame, the first cylinder is filled with hydraulic oil, a cylinder is arranged at the bottom of the rectangular plate, a push plate is movably arranged in the first cylinder, the telescopic end of the cylinder extends into the first cylinder and is fixedly connected with the push plate, a piston rod is fixed at the bottom of the push plate, the end of the piston rod away from the push plate penetrates through the bottom of the first cylinder and the U-shaped frame and is connected with an upper clamping plate, and the piston rod movably cooperates with the first cylinder and the U-shaped frame.

[0007] A plurality of second cylinders are embedded on the U-shaped frame, two liquid conveying pipes are communicated with the first cylinder, the liquid conveying pipes penetrate through the connecting plate, a plurality of shunt pipes are communicated with the liquid conveying pipes, the ends of the shunt pipes away from the liquid conveying pipes are communicated with adjacent second cylinders, a movable plate is movably arranged in the second cylinder, a movable rod is fixed on the side of the movable plate away from the shunt pipe, the end of the movable rod away from the movable plate extends to the outside of the second cylinder and is connected with a side clamping plate, and the movable rod movably cooperates with the second cylinder.

[0008] Two rollers are arranged at the bottom of the movable frame, and a plurality of universal wheels are arranged at the bottom of the moving base.

[0009] The two sides of the first lead screw are provided with cross bars, the cross bars are fixed between two fixed plates, the cross bars penetrate through the movable frame, the movable frame movably cooperates with the cross bars, the fixed frame is arranged outside the first lead screw and the cross bars, a first motor is arranged at the bottom of the fixed frame, the output end of the first motor penetrates through the fixed frame and is connected with a first bevel gear, and the screw threads of the center threaded holes of the two movable frames are in opposite directions.

[0010] A scale is arranged on the moving base, a pointer is fixed on the surface of the movable frame, and the pointer and the scale are matched with each other.

[0011] The lifting assembly comprises a second motor, the second motor is arranged at the top of the fixed frame, a second lead screw is arranged at the top of the fixed frame, a lifting block is movably arranged on the second lead screw, lifting plates are fixed on the two side surfaces of the lifting block, a rectangular slot is arranged on the side of the rectangular plate close to the fixed frame, the lifting plates and the rectangular slot are matched with each other, two vertical rods are fixed in the fixed frame, the two vertical rods are oppositely arranged on the two sides of the second lead screw, the vertical rods penetrate through the lifting block, and the lifting block movably cooperates with the vertical rods.

[0012] A construction method comprises the following steps: Step one: first adjust the U-shaped frame to the appropriate position, and make the subway track to be laid inside the U-shaped frame, start the air cylinder, push the push plate along the first cylinder cavity to move down, extrude the hydraulic oil in the first cylinder cavity to the shunt pipe through the liquid delivery pipe, and enter the corresponding second cylinder, extrude the movable plate, push the movable plate along the second cylinder cavity to move, make the movable rod move outward, until the several side clamping plates are respectively abutted with the two sides of the waist of the subway track, at this time the upper clamping plate is abutted with the top of the subway track, the purpose of limiting and clamping the subway track is realized; Step two: start the second motor, adjust the clamped fixed subway track to move up to the appropriate height under the cooperation of the lifting block and the second screw, and then drive the clamped fixed subway track to move to the construction position under the action of the universal wheel; Step three: after moving to the construction position, adjust the clamped subway track to the laying position, start the first motor, adjust the two movable frames to move away from each other under the cooperation of the first bevel gear and the second bevel gear, and control the distance between the two movable frames under the cooperation of the pointer and the scale, so as to adjust the distance between the two subway tracks, and then close the first motor and start the second motor to make the clamped fixed subway track move down to the laying position; Step four: drive the air cylinder to shrink, drive the push plate to move up, drive the upper clamping plate to move away from the clamped subway track with the piston rod, at the same time, with the upward movement of the push plate, negative pressure is formed in the first cylinder, the hydraulic oil in the second cylinder is sucked back to the first cylinder, and then the movable plate is moved synchronously, the side clamping plates are driven away from the clamped subway track with the movable rod, the subway track is placed in the laying position, and the laying of the subway track is completed.

[0013] The present application has the following advantages: The clamping assembly is used for clamping and fixing the subway track to be laid, and the first screw is adjusted to rotate under the cooperation of the first bevel gear and the second bevel gear, the movable frames on both sides are adjusted to move close to or away from each other under the cooperation of the movable frames and the first screw, so as to adjust the distance between the clamped fixed subway tracks on both sides, and the clamped fixed subway track is adjusted to move down under the action of the lifting assembly, so that the subway track is placed in the laying position, the laying of the subway track is completed, and the disadvantages of the prior art are solved.

[0014] Of course, implementing any of the products of the application does not necessarily require that all of the above-mentioned advantages be achieved at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on these drawings.

[0016] Figure 1 It is a schematic view of the overall structure of the present application; Figure 2 It is a top view of the present application; Figure 3 It is Figure 2 It is a schematic view of the structure of the section A-A; Figure 4 It is Figure 3 It is a schematic view of the structure of the section B-B; Figure 5 It is Figure 3 It is a schematic view of the structure of the section C-C; Figure 6 It is Figure 1 It is a schematic view of the enlarged structure at D; Figure 7 It is Figure 3 It is a schematic view of the enlarged structure at E; Figure 8 It is Figure 3 It is a schematic view of the enlarged structure at F; Figure 9 It is Figure 4 It is a schematic view of the enlarged structure at G; Figure 10 It is Figure 5 It is a schematic view of the enlarged structure at H; Figure 11 It is Figure 1 It is a schematic view of the structure from another perspective.

[0017] In the drawings, the components represented by each reference numeral are listed as follows: 1, mobile base; 2, fixed frame; 3, fixed plate; 4, first screw; 5, movable frame; 6, first bevel gear; 7, second bevel gear; 8, guide rod; 9, sliding block; 10, rectangular plate; 11, connecting plate; 12, U-shaped frame; 13, first cylinder; 14, air cylinder; 15, push plate; 16, piston rod; 17, upper clamping plate; 18, infusion tube; 19, shunt tube; 20, second cylinder; 21, movable plate; 22, movable rod; 23, side clamping plate; 24, roller; 25, cross bar; 26, first motor; 27, scale; 28, pointer; 29, second motor; 30, lifting block; 31, second screw; 32, vertical rod; 33, lifting plate; 34, universal wheel. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0019] In the description of the present application, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicate the orientation or positional relationship, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation of the present application.

[0020] Please refer to Figures 1-11 As shown in the drawings, the present application is a subway track laying device, which comprises a mobile base 1, a fixed frame 2 is fixed on the mobile base 1, two fixed plates 3 are fixed on the top of the mobile base 1, a first screw 4 is arranged between the two fixed plates 3, two movable frames 5 are threadedly arranged on the first screw 4, a second bevel gear 7 is fixedly sleeved on the first screw 4, a first bevel gear 6 is engaged on the upper side of the second bevel gear 7, a clamping assembly is arranged on the movable frame 5, a lifting assembly is arranged on the fixed frame 2, the lifting assembly and the clamping assembly cooperate with each other, and the clamping assembly comprises: A rectangular plate 10 is arranged on the movable frame 5, a through slot is formed through the movable frame 5, two guide rods 8 are fixedly arranged in the through slot, a sliding block 9 is slidably sleeved on the guide rod 8, a rectangular plate 10 is fixed between the adjacent two sliding blocks 9, a U-shaped frame 12 is arranged on the lower side of the rectangular plate 10, two connecting plates 11 are fixed between the top of the U-shaped frame 12 and the rectangular plate 10, and a limiting clamping structure is arranged on the U-shaped frame 12.

[0021] In the structure, the clamping assembly is used to clamp and fix the subway track to be laid, and the first bevel gear 6 and the second bevel gear 7 are used to adjust the rotation of the first lead screw 4, the movable frame 5 and the first lead screw 4 are used to adjust the movable frames 5 on both sides to move close to or away from each other, thereby adjusting the distance between the clamped and fixed subway tracks on both sides, and the lifting assembly is used to adjust the clamped and fixed subway track to move downward, so that the subway track is placed in the laying position, the laying of the subway track is completed, and the problems in the prior art are solved, i.e., the subway track is usually lifted by a crane or transported to a designated position by a transport vehicle, the position of the subway track is adjusted manually after the subway track is placed, which is time-consuming, laborious, labor-intensive, seriously affects the construction progress, and increases the work burden of workers.

[0022] The limiting and clamping structure comprises a first cylinder 13 arranged at the top of the U-shaped frame 12, the first cylinder 13 is filled with hydraulic oil, a gas cylinder 14 is arranged at the bottom of the rectangular plate 10, a push plate 15 is movably arranged in the first cylinder 13, the telescopic end of the gas cylinder 14 extends into the first cylinder 13 and is fixedly connected with the push plate 15, a piston rod 16 is fixed at the bottom of the push plate 15, one end of the piston rod 16 away from the push plate 15 penetrates through the bottom of the first cylinder 13 and the U-shaped frame 12 and is connected with an upper clamping plate 17, and the piston rod 16 movably cooperates with the first cylinder 13 and the U-shaped frame 12.

[0023] A plurality of second cylinders 20 are embedded on the U-shaped frame 12, two liquid delivery pipes 18 are connected to the first cylinder 13, the liquid delivery pipes 18 penetrate the connecting plate 11, a plurality of shunt pipes 19 are connected to the liquid delivery pipes 18, the shunt pipes 19 away from the liquid delivery pipes 18 are connected to adjacent second cylinders 20, a movable plate 21 is movably arranged in the second cylinder 20, a movable rod 22 is fixed to the side of the movable plate 21 away from the shunt pipe 19, one end of the movable rod 22 away from the movable plate 21 extends to the outside of the second cylinder 20 and is connected with a side clamping plate 23, and the movable rod 22 movably cooperates with the second cylinder 20.

[0024] Two rollers 24 are arranged at the bottom of the movable frame 5, which effectively support the bottom of the movable frame 5 and facilitate the movement of the movable frame 5, and a plurality of universal wheels 34 are arranged at the bottom of the moving base 1, which facilitate the movement of the clamped and fixed subway track.

[0025] The first screw rod 4 is provided with a cross rod 25 on both sides, the cross rod 25 is fixed between the two fixed plates 3, and the cross rod 25 penetrates the movable frame 5, the movable frame 5 is movably connected with the cross rod 25, the fixed frame 2 is transversely arranged outside the first screw rod 4 and the cross rod 25, the first motor 26 is arranged at the lower side of the fixed frame 2, the output end of the first motor 26 penetrates the fixed frame 2 and is connected with the first bevel gear 6, and the screw threads of the screw thread holes in the centers of the two movable frames 5 are opposite.

[0026] The movable base 1 is provided with a scale 27, and the movable frame 5 is provided with a pointer 28 at the lower side of one surface, the pointer 28 is matched with the scale 27, so that the distance between the two movable frames 5 can be accurately controlled, and the distance between the two subway tracks can be controlled, and the precise adjustment during the subway track laying process can be realized.

[0027] The lifting assembly comprises a second motor 29, the second motor 29 is arranged at the top of the fixed frame 2, the fixed frame 2 is provided with a second screw rod 31 at the upper side, the lifting block 30 is arranged on the second screw rod 31 in a threaded mode, the lifting plate 33 is fixed at the two side surfaces of the lifting block 30, the rectangular plate 10 is provided with a rectangular groove at the side surface close to the fixed frame 2, the lifting plate 33 is matched with the rectangular groove, the two vertical rods 32 are fixed in the fixed frame 2, the two vertical rods 32 are oppositely arranged at the two sides of the second screw rod 31, the vertical rod 32 penetrates the lifting block 30, and the lifting block 30 is movably connected with the vertical rod 32.

[0028] A construction method comprises the following steps: Step one: first, adjust the U-shaped frame 12 to a suitable position, and place the subway track to be laid inside the U-shaped frame 12, and start the air cylinder 14, push the push plate 15 to move downward along the inner cavity of the first cylinder 13, extrude the hydraulic oil in the inner cavity of the first cylinder 13 to the shunt pipe 19 through the liquid delivery pipe 18, and then enter the corresponding second cylinder 20 through the shunt pipe 19, extrude the movable plate 21, push the movable plate 21 to move along the inner cavity of the second cylinder 20, move the movable rod 22 outward, and drive the plurality of side clamping plates 23 to abut against the two sides of the waist of the subway track, at this time, the upper clamping plate 17 abuts against the top of the subway track, and the purpose of limiting and clamping the subway track is achieved; Step two: start the second motor 29, adjust the fixed and clamped subway track to move upward to a suitable height under the cooperation of the lifting block 30 and the second screw rod 31, and then drive the fixed and clamped subway track to move to the construction position under the action of the universal wheel 34. Step three: after moving to the construction position, adjust the clamped subway track to the laying position, start the first motor 26, under the meshing action of the first bevel gear 6 and the second bevel gear 7, combined with the thread cooperation of the movable frame 5 and the first lead screw 4, adjust the two movable frames 5 away from each other, control the distance between the two movable frames 5 under the cooperation of the pointer 28 and the scale 27, and then realize the adjustment of the distance between the two subway tracks. After the distance between the two subway tracks is adjusted in place, the first motor 26 is turned off, and the second motor 29 is started to move the clamped and fixed subway track downward to the laying position; Step four: drive the cylinder 14 to retract, drive the push plate 15 to move upward, combined with the piston rod 16, drive the upper clamping plate 17 to move away from the clamped subway track. At the same time, as the push plate 15 moves upward, a negative pressure is formed in the first cylinder 13, the hydraulic oil in the second cylinder 20 is sucked back into the first cylinder 13, and then the movable plate 21 is moved synchronously. Combined with the movable rod 22, the side clamping plate 23 is driven away from the clamped subway track, the subway track is placed in the laying position, and the subway track laying work is completed. Embodiment

[0029] During the subway track laying process, first start the second motor 29, drive the second lead screw 31 to rotate through the second motor 29, adjust the lifting block 30 to move downward stably under the thread cooperation of the lifting block 30 and the second lead screw 31, combined with the sliding cooperation of the lifting block 30 and the vertical rod 32, drive the lifting plate 33 to move synchronously under the cooperation of the lifting plate 33 and the rectangular groove on one side of the rectangular plate 10, and the sliding cooperation of the sliding block 9 and the guide rod 8, drive the rectangular plate 10 to move downward stably synchronously, until the U-shaped frame 12 moves to the position of the subway track, so that the subway track to be laid is located inside the U-shaped frame 12; Secondly, start the cylinder 14, push the push plate 15 to move downward along the inner cavity of the first cylinder 13 through the extension of the cylinder 14, drive the upper clamping plate 17 to move downward combined with the piston rod 16, at the same time, the hydraulic oil in the inner cavity of the first cylinder 13 is extruded into the corresponding second cylinder 20 through the delivery pipe 18 and the shunt pipe 19, extruding the movable plate 21, pushing the movable plate 21 to move along the inner cavity of the second cylinder 20, making the movable rod 22 move outward, until driving several side clamping plates 23 to respectively abut against both sides of the waist of the subway track, at this time, the upper clamping plate 17 abuts against the top of the subway track, achieving the purpose of limiting and clamping the subway track; At this time, drive the second motor 29 to rotate reversely, under the joint action of the second lead screw 31, the lifting block 30, the lifting plate 33, the rectangular plate 10 and the U-shaped frame 12, adjust the clamped and fixed subway track to move upward to the appropriate position; Then under the action of universal wheel 34, push mobile base 1 to move, drive clamped fixed subway track to move to construction site, until move to the position where subway track needs to be laid; At this time, start first motor 26, drive first bevel gear 6 to move through first motor 26, under the meshing action of first bevel gear 6 and second bevel gear 7, drive first lead screw 4 to rotate, under the thread cooperation of movable frame 5 and first lead screw 4, combined with the sliding cooperation of movable frame 5 and cross bar 25, and the action of roller 24, adjust two movable frames 5 to stably move away from each other or move close to each other; Wherein under the cooperation of pointer 28 and scale 27, control the distance between two movable frames 5, thereby realize adjusting the distance between two clamped fixed subway tracks, when the distance between two clamped fixed subway tracks meets the laying distance, close first motor 26; Secondly, continue to start second motor 29, under the joint action of second lead screw 31, lifting block 30, lifting plate 33, rectangular plate 10 and U-shaped frame 12, adjust two clamped subway tracks to move downward to laying position; Then drive cylinder 14 to contract, drive push plate 15 to move upward, combined with piston rod 16, drive upper clamping plate 17 to move away from clamped subway track, at the same time, with the upward movement of push plate 15, form negative pressure in first cylinder 13, draw hydraulic oil in second cylinder 20 back to first cylinder 13, thereby drive movable plate 21 to move synchronously, combined with movable rod 22, drive side clamping plate 23 to move away from clamped subway track, release subway track, stably place subway track to laying position, complete subway track laying operation, solve the problem that in the prior art, when subway track is laid, usually use crane to lift subway track or use transport vehicle to transport subway track to be laid to specified position, after placing subway track, adjust the position of subway track through manual operation, which is time-consuming and laborious, seriously affect construction progress, and because subway track is long and heavy, labor intensity is large when adjusting subway track through manual operation, increase the work burden of workers.

[0030] It needs to be further explained that the mounting structure, connection mode or setting mode of each component in the application are common mechanical modes, as long as the beneficial effects can be achieved, and the application can be implemented, at the same time, cylinder 14, first motor 26 and second motor 29 are purchased on the market, and the person skilled in the art can install and use according to requirements.

[0031] In the description of the specification, reference to "one embodiment", "an example", "a specific example" or the like means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "an example", "a specific example" or the like in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of the application disclosed above are only to help explain the application. The preferred embodiments do not describe all the details of the application and limit the application to the specific embodiments described. Obviously, many modifications and variations can be made in light of the contents of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical application of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A subway track laying device, comprising a mobile base (1), characterized in that: A fixed frame (2) is fixed on the movable base (1), two fixed plates (3) are relatively fixed on the top of the movable base (1), a first screw rod (4) is provided between the two fixed plates (3), two movable frames (5) are threadedly provided on the first screw rod (4), a second bevel gear (7) is fixedly sleeved on the first screw rod (4), and a first bevel gear (6) is meshed on the upper side of the second bevel gear (7), a clamping assembly is provided on the movable frame (5), and a lifting assembly is provided on the fixed frame (2), the lifting assembly cooperates with the clamping assembly, and the clamping assembly comprises: A rectangular plate (10) is provided, wherein a through slot is provided on the movable frame (5), wherein two guide rods (8) are relatively fixed in the through slot, wherein a slider (9) is provided on the guide rod (8), and a rectangular plate (10) is fixed between two adjacent sliders (9), wherein a U-shaped frame (12) is provided on the lower side of the rectangular plate (10), wherein two connecting plates (11) are fixed between the top of the U-shaped frame (12) and the rectangular plate (10), and wherein a limited position clamping structure is provided on the U-shaped frame (12).

2. A subway track laying device according to claim 1, characterized in that: The position limiting clamping structure includes a first cylinder (13), which is arranged on the top of the U-shaped frame (12). The first cylinder (13) is filled with hydraulic oil. A cylinder (14) is installed at the bottom of the rectangular plate (10). A push plate (15) is movably arranged in the first cylinder (13). The telescopic end of the cylinder (14) extends into the interior of the first cylinder (13) and is fixedly connected to the push plate (15). A piston rod (16) is fixed to the bottom of the push plate (15). The end of the piston rod (16) away from the push plate (15) passes through the bottom of the first cylinder (13) and the U-shaped frame (12) and is connected to an upper clamping plate (17). The piston rod (16) is movably matched with the first cylinder (13) and the U-shaped frame (12).

3. The subway track laying device according to claim 2, characterized in that: A plurality of second cylinders (20) are embedded in the U-shaped frame (12), and two infusion tubes (18) are connected to the first cylinder (13), and the infusion tubes (18) pass through the connecting plate (11). The infusion tubes (18) are connected to a plurality of shunt tubes (19), and one end of the shunt tube (19) away from the infusion tube (18) is connected to the adjacent second cylinder (20). A movable plate (21) is movably provided inside the second cylinder (20), and a movable rod (22) is fixed on a side of the movable plate (21) away from the shunt tube (19). The end of the movable rod (22) away from the movable plate (21) extends to the outside of the second cylinder (20) and is connected to a side clamping plate (23), and the movable rod (22) is movably matched with the second cylinder (20).

4. The subway track laying device according to claim 3, characterized in that: Two rollers (24) are installed at the bottom of the movable frame (5), and a plurality of universal wheels (34) are installed at the bottom of the movable base (1).

5. The subway track laying device according to claim 4, characterized in that: A cross bar (25) is provided on both sides of the first screw rod (4), the cross bar (25) is fixed between the two fixed plates (3), and the cross bar (25) passes through the movable frame (5), the movable frame (5) and the cross bar (25) are movably matched, the fixed frame (2) spans the first screw rod (4) and the outside of the cross bar (25), a first motor (26) is installed on the lower side of the inside of the fixed frame (2), the output end of the first motor (26) passes through the fixed frame (2) and is connected to the first bevel gear (6), and the thread directions of the center threaded holes of the two movable frames (5) are opposite.

6. The subway track laying device according to claim 5, characterized in that: A scale (27) is provided on the movable base (1), and a pointer (28) is fixed on the lower side of a surface of the movable frame (5), and the pointer (28) cooperates with the scale (27).

7. The subway track laying device according to claim 6, characterized in that: The lifting assembly includes a second motor (29), which is installed on the top of the fixing frame (2). A second screw rod (31) is provided on the upper side of the fixing frame (2). A lifting block (30) is threadedly provided on the second screw rod (31). Lifting plates (33) are fixed to both sides of the lifting block (30). A rectangular groove is provided on a side of the rectangular plate (10) close to the fixing frame (2). The lifting plate (33) cooperates with the rectangular groove. Two vertical rods (32) are fixed to the inside of the fixing frame (2). The two vertical rods (32) are relatively arranged on both sides of the second screw rod (31). The vertical rods (32) pass through the lifting block (30), and the lifting block (30) and the vertical rods (32) are movably cooperated.

8. A construction method, based on the subway track laying device according to claim 7, characterized in that: The following steps are involved: Step 1: First, adjust the U-shaped frame (12) to a suitable position, and place the subway track to be laid inside the U-shaped frame (12), and at the same time start the cylinder (14), extend the cylinder (14), push the push plate (15) downward along the inner cavity of the first cylinder (13), squeeze the hydraulic oil in the inner cavity of the first cylinder (13) into the shunt pipe (19) through the liquid delivery pipe (18), and enter the corresponding second cylinder (20) through the shunt pipe (19), squeeze the movable plate (21), and push the movable plate (21) to move along the inner cavity of the second cylinder (20), so that the movable rod (22) moves outward until it drives a plurality of side clamps (23) to respectively abut against the two sides of the waist of the subway track. At this time, the upper clamp (17) abuts against the top of the subway track, thereby achieving the purpose of limiting the clamping of the subway track; Step 2: Start the second motor (29), and adjust the clamped subway track to a suitable height under the cooperation of the threads of the lifting block (30) and the second screw rod (31), and then drive the clamped subway track to move to the construction position under the action of the universal wheel (34); Step 3: After moving to the construction position, adjust the clamped subway track to the laying position, start the first motor (26), and under the meshing action of the first bevel gear (6) and the second bevel gear (7), in combination with the thread cooperation of the movable frame (5) and the first screw rod (4), adjust the two movable frames (5) to move away from each other, and under the mutual cooperation of the pointer (28) and the scale (27), control the distance between the two movable frames (5), thereby adjusting the distance between the two subway tracks. After the distance between the two subway tracks is adjusted to the right position, turn off the first motor (26) and start the second motor (29), so that the clamped subway track moves downward to the laying position; Step 4: The driving cylinder (14) contracts, driving the push plate (15) to move upward, and in combination with the piston rod (16), driving the upper clamping plate (17) away from the clamped subway track. At the same time, as the push plate (15) moves upward, a negative pressure is formed inside the first cylinder (13), and the hydraulic oil in the second cylinder (20) is pumped back into the first cylinder (13), thereby driving the movable plate (21) to move synchronously. In combination with the movable rod (22), the side clamping plate (23) is driven away from the clamped subway track, and the subway track is placed in the laying position, completing the subway track laying operation.

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