Bridge type paver

Abstract

The utility model provides a bridge type paver which comprises a top crawler belt platform and a bottom crawler belt platform, a top crawler belt assembly is arranged on the top crawler belt platform, a channel top crawler belt is arranged on the top crawler belt assembly, one side of the top crawler belt platform is fixedly connected with one end of a bridge frame, double shaftless screw conveyors are arranged in the bridge frame, and the bottom crawler belt platform is provided with a channel top crawler belt. And a plurality of bidirectional spiral paving devices matched with the double shaftless spiral conveyors are arranged on one side of the bottom of the bridge frame. The bridge type paver has the following beneficial effects that the bridge type paver provided by the utility model can move forwards along the bottom of a channel, can realize a series of automatic actions of automatic feeding action, conveying materials through the double shaftless screw conveyors, distributing materials through the two-way screw paver and carrying out primary compaction through the ironing device; therefore, the transverse continuous asphalt concrete paving construction along the slope surface of the channel is realized, the uniform paving of the asphalt concrete is realized, and the paving construction quality of the asphalt concrete is ensured.

Description

Technical Field

[0001] The utility model relates to a bridge-type paver, belonging to the field of river bank and channel construction equipment. Background Art

[0002] In recent years, asphalt concrete has been widely used in hydraulic anti-seepage projects as an excellent anti-seepage material. However, at present, asphalt concrete lining is rarely used in canal anti-seepage projects in my country. In addition to the high price of asphalt in the past, the main reason is that there are no supporting machinery and processes suitable for canal asphalt concrete construction in China. The construction experience is only limited to manual construction, and it is difficult to ensure the construction quality and work efficiency. The porosity of the constructed asphalt concrete is 5-8%, and the permeability coefficient is above 10-6cm / s.

[0003] Engineering practice shows that the previous domestic construction mode based on manual or shift mechanized construction is difficult to guarantee construction quality, the material mixing accuracy is not high, and the paving and compaction quality is difficult to guarantee, resulting in common flow and cracking of the panel, which affects the effectiveness of the project and the promotion of asphalt concrete anti-seepage technology in China.

[0004] Drawing on the existing concrete channel lining construction technology and foreign asphalt concrete channel lining construction technology, relying on the existing hydraulic asphalt anti-seepage paving construction force, and focusing on the development of channel asphalt concrete lining paving technology, we have developed a channel asphalt concrete lining paving device with low cost, simple operation and high construction efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a bridge-type paver.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A bridge paver comprises a top crawler platform and a bottom crawler platform, wherein a top crawler assembly is provided on the top crawler platform, a channel top crawler is provided on the top crawler assembly, one side of the top crawler platform is connected and fixed to one end of a bridge frame, a double shaftless screw conveyor is provided inside the bridge frame, a plurality of bidirectional spiral pavers matched with the double shaftless screw conveyors are provided on one side of the bottom of the bridge frame, a plurality of groups of ironing devices matched with the bidirectional spiral pavers are provided at the bottom of the bridge frame, the other end of the bridge frame is movably connected with a channel bottom support platform through a second connecting support and a first connecting support, the channel bottom support platform is mounted on the top of the bottom crawler platform, a bottom crawler assembly is provided on the bottom crawler platform, two channel bottom crawlers are provided on the bottom crawler assembly, a gantry is connected to the top of the channel bottom support platform, a storage tank is installed in the middle of the gantry, a lower end of the double shaftless screw conveyor passes through the inside of the gantry and corresponds to the bottom discharge port of the storage tank, and a feeding mechanism is installed on the top of the gantry.

[0008] Furthermore, the feeding mechanism includes a frame, which is installed on one side of the top of the gantry. A motor is provided on the top of the frame. The output end of the motor is connected to the reducer through an elastic coupling. The output ends on both sides of the reducer are connected to the drum shafts inside the left winch device and the right winch device through a gear coupling and an intermediate shaft respectively.

[0009] Furthermore, the feeding mechanism also includes a guide rail arranged on the side of the gantry, a feeding hopper is slidably connected in the guide rail, two guide rollers and a movable pulley are provided on the feeding hopper, a group of redirecting pulleys are fixed on the top of the gantry, and the rope ends of the wire ropes in the left winch device and the right winch device pass through the redirecting pulley and then through the movable pulley to be fixed on the wheel axle of the redirecting pulley.

[0010] Furthermore, the double shaftless screw conveyor includes a channel shell, which is fixed on the bridge frame, and a screw motor is respectively provided on both sides of one end of the channel shell, and the output end of the screw motor passes through the interior of the channel shell and is connected to the screw conveying blade through a coupling, and a plurality of discharge ports are opened at the bottom of the channel shell, and a plurality of distribution hoppers are provided below the discharge ports, and the distribution hoppers are fixed at the bottom of the channel shell, and the discharge end of the distribution hopper passes through the bottom of the bridge frame.

[0011] Furthermore, the bidirectional spiral paver is located below the discharge end of the distribution hopper, and the bidirectional spiral paver includes a cycloidal pinwheel reducer and a tail sprocket box, both of which are fixed to the bottom of the bridge, and the input end of the tail sprocket box is connected to the output end of the cycloidal pinwheel reducer, and the output end of the tail sprocket box is respectively connected to the short spiral shaft and the long spiral shaft, and the middle parts of the short spiral shaft and the long spiral shaft are both sleeved with support members, and the support members are connected and fixed to the bottom of the bridge, and the ends of the short spiral shaft and the long spiral shaft are both provided with end bolt blades, and the middle parts of the short spiral shaft and the long spiral shaft are both provided with main spiral blades.

[0012] Furthermore, the spiral directions of the end bolt blade and the main spiral blade on both the short spiral shaft and the long spiral shaft are opposite.

[0013] Furthermore, a cab and an electric control system are provided on the gantry, and a hydraulic system is provided at the bottom of the bridge.

[0014] Furthermore, a scraper device is provided at the bottom of the bridge frame, and the scraper device includes a pushing mechanism and a scraper. The pushing mechanism is fixed at the bottom of the bridge frame, and the output end of the pushing mechanism is connected to the scraper.

[0015] Beneficial effects of the utility model:

[0016] The bridge-type paver provided by the utility model can move forward along the bottom of the channel, can realize automatic loading, and then transport materials by a double shaftless screw conveyor, spread materials by a bidirectional spiral paving device, and perform a series of automated actions of initial compaction by an ironing device, thereby ensuring the construction of horizontal continuous asphalt concrete paving along the channel slope, achieving uniform paving of asphalt concrete, and ensuring the quality of asphalt concrete paving construction.

[0017] The design and development of the bridge-type paver provided by the utility model is mainly to cooperate with the channel lining construction, and to carry out scientific research and development on the paving technology of the channel asphalt concrete lining. From the perspective of single-machine equipment processing, the unit price of foreign bridge-type asphalt concrete pavers exceeds 10 million, and the research and development and processing costs of the channel paver independently developed by the present invention will not exceed 5 million, and the equipment is superior to foreign ones in terms of technology and economy.

[0018] The bridge-type paver provided by the utility model is simple to operate, low in cost, and high in construction efficiency. It opens up a new field for channel asphalt concrete lining construction, solves the problem that domestic manual or semi-mechanized construction cannot guarantee construction quality, ensures high batching accuracy and excellent rolling quality during the construction process, and has fast paving capacity, high efficiency, and energy saving, and can effectively guarantee construction progress.

[0019] The bridge-type paver provided by the utility model is designed with guide rollers, movable pulleys and redirecting pulleys, so that the wire rope of the winch can be threaded in a rope-threading manner with a multiple of , so that when the winch is retracting the rope, the upper hopper climbs along the guide rail, and when it reaches the top of the guide rail, the upper guide roller is blocked, and the upper hopper rotates around the upper guide roller as the center to perform a flipping and unloading action. After the unloading is completed, the winch loosens the rope, and the upper hopper, under the action of its own weight, first rotates and resets, and then slides down along the guide rail to the material receiving position.

[0020] The double shaftless screw conveyor for the bridge-type paver provided by the utility model adopts a design without a center shaft and with a hanging shaft. It has a compact structure, large torque, and low energy consumption. Since the screw has no shaft, materials are not easy to be blocked and can run at a lower speed with smooth rotation. Moreover, the screw has super wear resistance and durability, is durable, has a long conveying distance, and can adapt to changes in the paving amount.

[0021] The bidirectional spiral pavers of the bridge-type paver provided by the utility model are arranged at the bottom of the bridge frame, and the spiral part is made into a structure that is short at the top and long at the bottom, and one is positive and the other is negative, which is mainly beneficial to the distribution of asphalt concrete on the slope, and the five discharge ports of the double shaftless screw conveyor respectively correspond to a set of bidirectional spiral pavers, and the asphalt can be evenly spread on the slope of the channel through five sets of the equipment.

[0022] The bridge-type paver provided by the utility model can adjust the asphalt concrete paving thickness by adjusting the lifting and lowering of the scraper when the equipment is working through the arrangement of the pushing mechanism and the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a front view structural schematic diagram of a bridge-type paver of the utility model;

[0025] Figure 2 It is a schematic diagram of the top view of a bridge-type paver of the utility model;

[0026] Figure 3 It is a left-side structural schematic diagram of a bridge-type paver of the utility model;

[0027] Figure 4 This is a schematic diagram of the AA cross-sectional structure of a bridge frame of a bridge-type paver of the utility model;

[0028] Figure 5It is a partial top view structural diagram of a feeding mechanism of a bridge-type paver of the utility model;

[0029] Figure 6 It is a partial side structural schematic diagram of a feeding mechanism of a bridge-type paver of the utility model;

[0030] Figure 7 This is a schematic diagram of the front view structure of a bridge frame of a bridge-type paver of the utility model;

[0031] Figure 8 This is a schematic diagram of the top view of the bridge frame of a bridge-type paver of the utility model;

[0032] Fig. 9 It is a schematic diagram of the front view structure of a double shaftless screw conveyor of a bridge-type paver of the utility model;

[0033] Fig.10 It is a schematic diagram of the top view of the structure of a double shaftless screw conveyor of a bridge-type paver of the utility model;

[0034] Fig.11 It is a schematic diagram of the side structure of a double shaftless screw conveyor of a bridge-type paver of the utility model;

[0035] Fig.12 It is a schematic diagram of the front view structure of a bidirectional spiral paver of a bridge-type paver of the utility model;

[0036] Fig.13 It is a schematic diagram of the top view of the bidirectional spiral paver of a bridge-type paver of the utility model;

[0037] Fig.14 This is a schematic diagram of the front view structure of the bottom crawler platform of a bridge-type paver of the utility model;

[0038] Fig.15 It is a schematic diagram of the side structure of the bottom crawler platform of a bridge-type paver of the utility model;

[0039] Fig.16 This is a schematic diagram of the top view of the bottom crawler platform of a bridge-type paver of the utility model;

[0040] Fig.17 It is a schematic diagram of the side structure of the top crawler platform of a bridge-type paver of the utility model;

[0041] Fig.18 The utility model is a schematic diagram of the top crawler platform of the bridge-type paver viewed from above.

[0042] In the figure, 1. top crawler platform; 2. bottom crawler platform; 3. top crawler assembly; 4. bottom crawler assembly; 5. gantry; 6. storage tank; 7. bridge; 8. bidirectional spiral pavers; 9. ironing machine; 10. cab; 11. electric control system; 12. support; 13. channel bottom crawler; 14. connecting support 1; 15. connecting support 2; 16. double shaftless screw conveyor; 17. channel bottom support platform; 18. channel top crawler; 19. frame; 20. motor; 21. elastic Coupling; 22. Reducer; 23. Gear coupling; 24. Intermediate shaft; 25. Left winch; 26. Right winch; 27. Guide rail; 28. Upper hopper; 29. ​​Guide roller; 30. Movable pulley; 31. Redirecting pulley; 32. Channel housing; 33. Screw motor; 34. Screw conveying blade; 35. Distribution hopper; 36. Cycloidal pinwheel reducer; 37. Tail sprocket box; 38. Short spiral shaft; 39. Long spiral shaft; 40. End bolt blade; 41. Main spiral blade. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] See also Figure 1-Figure 18The utility model provides a technical solution for a bridge-type paver, a bridge-type paver, comprising a top crawler platform 1 and a bottom crawler platform 2, the top crawler platform 1 is provided with a top crawler assembly 3, the top crawler assembly 3 is provided with a channel top crawler 18, one side of the top crawler platform 1 is connected and fixed with one end of a bridge frame 7, the bridge frame 7 is a steel truss, having the same inclination as the slope ratio, spanning between the channel bottom and the slope top, one side of the bridge frame 7 is provided with a walkway for operators to observe, adjust, inspect and perform other operations, comprehensively considering factors such as the hoisting capacity, transportation and shifting operations at the construction site, the bridge frame 7 is divided into two sections, the upper section is short, and the lower section is long, the interior of the bridge frame 7 A double shaftless screw conveyor 16 is provided, and a plurality of bidirectional spiral pavers 8 cooperating with the double shaftless screw conveyor 16 are provided on one side of the bottom of the bridge frame 7. A plurality of groups of ironing devices 9 cooperating with the bidirectional spiral pavers 8 are provided at the bottom of the bridge frame 7. The other end of the bridge frame 7 is movably connected to a channel bottom support platform 17 through a connecting support 2 15 and a connecting support 1 14. The channel bottom support platform 17 is installed on the top of the bottom crawler platform 2. A bottom crawler assembly 4 is provided on the bottom crawler platform 2. Two channel bottom crawlers 13 are provided on the bottom crawler assembly 4. A gantry 5 is connected to the top of the channel bottom support platform 17. The gantry 5 is a steel section. The assembled truss serves as the installation base for the feeding system and the fixed storage tank 6. A mounting platform for the cab 10 and a walkway for entering the cab 10 are provided on one side of the gantry 5. A platform and a ladder for installing, inspecting and maintaining the feeding system are also provided on the gantry 5. A storage tank 6 is installed in the middle of the gantry 5. The storage tank 6 is used as a regulating container for intermittent material receiving and continuous material distribution. It is made of steel plate and mounted on the gantry 5. The outside of the storage tank 6 is wrapped with insulation material to reduce the heat dissipation of the material. A door that can be closed and adjusted in size of the outlet is installed at the bottom of the storage tank 6 to cut off or adjust the output of the material. A vibration device can be installed on the side plate of the storage tank 6. The double shaftless screw conveyor 1 The lower end of 6 penetrates into the interior of the gantry 5 and corresponds to the bottom discharge port of the storage tank 6. A feeding mechanism is installed on the top of the gantry 5. A cab 10 and an electric control system 11 are also provided on the gantry 5. A linkage operating table is provided in the cab 10, on which operating handles, buttons, signal lights, main command switches, etc. of various mechanisms are installed, and various instruments such as a winch positioner are installed. A hydraulic system is provided at the bottom of the bridge 7; the motive force of each crawler track is a YZPB180L-8 variable frequency motor. After the motor is decelerated by a planetary reducer, the driving wheel converts the torque into the driving force of the crawler track, and the variable frequency motor is used to control the travel speed and direction of the crawler track.

[0045] See also Figure 1-Figure 6The feeding mechanism includes a frame 19, which is installed on one side of the top of the gantry 5. A motor 20 is provided on the top of the frame 19. The output end of the motor 20 is connected to a reducer 22 through an elastic coupling 21. The output ends of the reducer 22 on both sides are connected to the drum shafts inside the left hoisting device 25 and the right hoisting device 26 through a gear coupling 23 and an intermediate shaft 24. The feeding mechanism also includes a guide rail 27 arranged on the side of the gantry 5. The guide rail 27 is two The guide rail 27 is fixed to the door frame 5. The upper hopper 28 is slidably connected in the guide rail 27. The upper hopper 28 is a plate open container with a theoretical volume of 5.5m3 and a loading mass of 8.5t. The upper hopper 28 is provided with two guide rollers 29 and a movable pulley 30. A set of redirecting pulleys 31 are fixed on the top of the door frame 5. The rope ends of the steel wire ropes in the left hoisting device 25 and the right hoisting device 26 pass through the redirecting pulley 31 and then pass through the movable pulley 30 to be fixed on the redirecting pulley 31. The upper hopper 28 is mounted on the axle, thereby forming a rope threading method with a ratio of 2. In this way, when the winch is retracting the rope, the upper hopper 28 climbs along the guide rail 27. When it reaches the top of the guide rail 27, the upper guide roller 29 is blocked, and the upper hopper 28 rotates around the upper guide roller 29 as the center to perform a flip unloading action. After unloading is completed, the winch loosens the rope, and the upper hopper 28, under the action of its own weight, first rotates and resets, and then slides down along the guide rail 27 to the material receiving position; the winch is powered by a YZR225M-8 / 26kW motor, which is elastically braked. The wheel coupling inputs the power into the ZQ650 reducer. The output shafts at both ends of the reducer are connected to the drum shaft through the CLZ6 gear coupling and the intermediate shaft, thereby driving the drum to rotate. The left and right drums are cast iron parts with a diameter of φ360mm, single-layer winding, and the wire rope deflection angle is about 5°. The wire rope is 17NAT6×19+FC1670ZS, with a safety factor of 5. The motor is selected when the rated hoisting force reaches 2×32kN, and the working system is S3, Fc=25%. The reducer of the mechanism uses a JZQ gear reducer, and the static-dynamic rate and intermediate working system of the motor are the main basis for the selection of the reducer. The winch also has a QGX travel switch, which has two upper and two lower limit adjustable contacts as the upper and lower limit protection of the machine.

[0046] See also Figure 1 , Figure 2 , Figure 9-11The double shaftless screw conveyor 16 includes a channel housing 32, which is fixed on the bridge 7. A screw motor 33 is provided on both sides of one end of the channel housing 32. The output end of the screw motor 33 passes through the inside of the channel housing 32 and is connected to the screw conveying blade 34 through a coupling. A plurality of discharge ports are provided at the bottom of the channel housing 32. A plurality of distribution hoppers 35 are provided below the discharge ports. The distribution hoppers 35 are fixed at the bottom of the channel housing 32. The discharge end of the distribution hopper 35 passes through the bottom of the bridge 7. Double shaftless screw conveyor 16 adopts a design with a hanging shaft but no center shaft. It has a compact structure, large torque and low energy consumption. Since the spiral has no shaft, the material is not easy to get blocked and can run at a lower speed with smooth rotation. The spiral has super wear resistance and durability, is durable and has a long conveying distance. In addition, in order to adapt to the changes in the paving volume, this conveyor is driven by a variable frequency motor to adapt to the requirements of the conveying flow rate for different paving thicknesses and paving travel speeds. Each discharge port at the bottom is equipped with a door that can be closed and the size of the outlet can be adjusted to separate or adjust the discharge flow of the material so as to achieve a basically uniform distribution of the material on the construction section.

[0047] See also Figure 1 , Figure 2 , Fig.12 , Fig.13 The bidirectional spiral paver 8 is located below the discharge end of the distribution hopper 35. The bidirectional spiral paver 8 includes a cycloidal pinwheel reducer 36 and a tail sprocket box 37. The cycloidal pinwheel reducer 36 and the tail sprocket box 37 are both fixed to the bottom of the bridge 7. The input end of the tail sprocket box 37 is connected to the output end of the cycloidal pinwheel reducer 36. The output end of the tail sprocket box 37 is respectively connected to a short spiral shaft 38 and a long spiral shaft 39. The middle parts of the short spiral shaft 38 and the long spiral shaft 39 are both sleeved with a support member 12. The support member 12 is connected and fixed to the bottom of the bridge 7. The short spiral shaft 38 and the long spiral shaft 39 are respectively sleeved with a support member 12. The support member 12 is connected and fixed to the bottom of the bridge 7. The ends of both long spiral shafts 39 are provided with end bolt blades 40, and the middle parts of both the short spiral shaft 38 and the long spiral shaft 39 are provided with main spiral blades 41, and the spiral directions of the end bolt blades 40 and the main spiral blades 41 on the short spiral shaft 38 and the long spiral shaft 39 are opposite; the bidirectional spiral paver 8 is arranged at the bottom of the bridge frame 7, and the spiral part is made into a structure with a short upper part and a long lower part, one positive and one negative, which is mainly beneficial to the distribution of asphalt concrete on the slope, and the five discharge ports of the double shaftless screw conveyor 16 correspond to a set of bidirectional spiral paver 8 respectively, and the asphalt can be evenly spread on the slope of the channel through five sets of this equipment.

[0048] A scraper device (not shown in the figure) is also provided at the bottom of the bridge frame 7, and the scraper device includes a pushing mechanism and a scraper. The pushing mechanism is fixed at the bottom of the bridge frame 7, and the output end of the pushing mechanism is connected to the scraper. By setting the pushing mechanism and the scraper, the scraper can be adjusted to rise and fall when the equipment is working to achieve the purpose of adjusting the asphalt concrete paving thickness.

[0049] Performance indicators of channel asphalt concrete lining paving device: system productivity, daily paving length (single slope along the channel axis direction) not less than 500 meters, paving thickness 50-80mm, thickness deviation not more than 5mm; rated paving volume 1m3 / min; walking speed 0.5-3mm / min during working, maximum walking speed 4.5mm / min in non-working state; three-phase four-wire 380V cable reel power supply.

[0050] When in use, asphalt concrete is transported to the paver by a dump truck traveling along the bottom of the channel, unloaded into the upper hopper 28, and then driven by the motor 20 to pull the pull ropes on both sides of the left winch 25 and the right winch 26 at the same time, pulling the upper hopper 28 to lift the soil to the top of the gantry 5, and dumped into the storage tank 6, and fed to the double shaftless screw conveyor 16 through the discharge port with an adjustable opening at the bottom of the storage tank 6, and bolted through the two sets of spiral conveying blades 34 in the double shaftless screw conveyor 16, so that the soil can be transported from bottom to top along the channel shell 32, and through the bottom The five discharge ports are transported to the distribution hopper 35. Through the temporary storage and discharge adjustment of the distribution hopper 35, the intermittent discharge action is performed, and then the soil material can be distributed in front of the spiral paving machine, and then spread by five sets of bidirectional spiral pavers 8. The thickness of the asphalt concrete paving is controlled by the adjustable height scraper arranged at the bottom of the bridge 7. While the whole machine moves forward, the segmented ironing device 9 suspended on the bridge 7 starts to work. The vibration compaction time is adjusted by adjusting the travel speed to meet the compaction requirements. The master-slave inverter synchronization technology is used to control the synchronous movement of the upper and lower crawler trolleys.

[0051] The position of the crawler trolley relative to the slope is measured and adjusted by a set of measurement and control equipment. The small curvature turning of the crawler trolley is completed by adjusting the walking speed of the trolley on the top of the slope relative to the trolley at the bottom of the channel.

[0052] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bridge-type paver, characterized in that: The invention comprises a top crawler platform (1) and a bottom crawler platform (2), wherein the top crawler platform (1) is provided with a top crawler assembly (3), and the top crawler assembly (3) is provided with a channel top crawler (18), one side of the top crawler platform (1) is connected and fixed to one end of a bridge frame (7), a double shaftless screw conveyor (16) is provided inside the bridge frame (7), a plurality of bidirectional spiral pavers (8) matched with the double shaftless screw conveyors (16) are provided on one side of the bottom of the bridge frame (7), a plurality of groups of ironing devices (9) matched with the bidirectional spiral pavers (8) are provided at the bottom of the bridge frame (7), and the other end of the bridge frame (7) is connected to a support The second support (15) and the connecting support (14) are movably connected to the channel bottom support platform (17), and the channel bottom support platform (17) is installed on the top of the bottom crawler platform (2). The bottom crawler platform (2) is provided with a bottom crawler assembly (4), and the bottom crawler assembly (4) is provided with two channel bottom crawlers (13). The top of the channel bottom support platform (17) is connected to a gantry (5), and a storage tank (6) is installed in the middle of the gantry (5). The lower end of the dual shaftless screw conveyor (16) passes through the inside of the gantry (5) and corresponds to the bottom discharge port of the storage tank (6). A loading mechanism is installed on the top of the gantry (5).

2. A bridge-type paver according to claim 1, characterized in that: The feeding mechanism comprises a frame (19), the frame (19) is mounted on one side of the top of the door frame (5), a motor (20) is arranged on the top of the frame (19), the output end of the motor (20) is connected to a reducer (22) via an elastic coupling (21), and the output ends on both sides of the reducer (22) are respectively connected to the reel shafts inside the left hoisting device (25) and the right hoisting device (26) via a gear coupling (23) and an intermediate shaft (24).

3. A bridge-type paver according to claim 2, characterized in that: The feeding mechanism also includes a guide rail (27) arranged on the side of the door frame (5), a feeding hopper (28) is slidably connected in the guide rail (27), two guide rollers (29) and a movable pulley (30) are provided on the feeding hopper (28), a group of redirecting pulleys (31) are fixed on the top of the door frame (5), and the rope ends of the steel wire ropes in the left hoisting device (25) and the right hoisting device (26) pass through the redirecting pulley (31) and then through the movable pulley (30) to be fixed on the wheel axle of the redirecting pulley (31).

4. A bridge-type paver according to claim 3, characterized in that: The dual shaftless screw conveyor (16) comprises a channel shell (32), the channel shell (32) is fixed on the bridge frame (7), a screw motor (33) is respectively provided on both sides of one end of the channel shell (32), the output end of the screw motor (33) passes through the interior of the channel shell (32) and is connected to the screw conveying blade (34) through a coupling, a plurality of discharge ports are opened at the bottom of the channel shell (32), a plurality of distribution hoppers (35) are provided below the discharge ports, the distribution hoppers (35) are fixed at the bottom of the channel shell (32), and the discharge end of the distribution hopper (35) passes through the bottom of the bridge frame (7).

5. A bridge-type paver according to claim 4, characterized in that: The bidirectional spiral paving device (8) is located below the discharge end of the material distribution hopper (35), and the bidirectional spiral paving device (8) comprises a cycloid pinwheel reducer (36) and a tail sprocket box (37). The cycloid pinwheel reducer (36) and the tail sprocket box (37) are both fixed to the bottom of the bridge frame (7), the input end of the tail sprocket box (37) is connected to the output end of the cycloid pinwheel reducer (36), and the output end of the tail sprocket box (37) is respectively connected to the short spiral reducer (36). The swivel shaft (38) is connected to the long spiral shaft (39), and the middle parts of the short spiral shaft (38) and the long spiral shaft (39) are both sleeved with a support member (12), and the support member (12) is connected and fixed to the bottom of the bridge frame (7), and the ends of the short spiral shaft (38) and the long spiral shaft (39) are both provided with end bolt blades (40), and the middle parts of the short spiral shaft (38) and the long spiral shaft (39) are both provided with main spiral blades (41).

6. A bridge-type paver according to claim 5, characterized in that: The end bolt blade (40) and the main spiral blade (41) on both the short spiral shaft (38) and the long spiral shaft (39) have opposite spiral directions.

7. A bridge-type paver according to claim 6, characterized in that: The gantry (5) is also provided with a cab (10) and an electric control system (11), and the bottom of the bridge (7) is provided with a hydraulic system.

8. The bridge-type paver according to claim 7, characterized in that: A scraper device is also provided at the bottom of the bridge frame (7), and the scraper device comprises a pushing mechanism and a scraper. The pushing mechanism is fixed at the bottom of the bridge frame (7), and the output end of the pushing mechanism is connected to the scraper.

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