CN113147796B - Mountain heavy-load double-rail transport vehicle for overhead transmission line construction and construction method thereof - Google Patents

Abstract

The invention discloses a mountain heavy-load double-rail transport vehicle for overhead transmission line construction and a construction method thereof, belonging to the technical field of rail transport vehicles.

Description

Mountain heavy-load double-rail transport vehicle for overhead transmission line construction and construction method thereof

Technical Field

The invention relates to the technical field of rail transport vehicles, in particular to a mountain heavy-load double-rail transport vehicle for overhead transmission line construction and a construction method thereof.

Background

The construction of overhead transmission lines of various voltage classes is basically divided into four major sub-processes of foundation construction, erection tower construction, stretch releasing and paying off construction and accessory installation. Materials such as sand stone materials, reinforced cement, foundation bolts and the like are needed for foundation construction; the construction of the assembled tower requires entering tower materials, iron tower bolts, construction holding poles, motorized winching, steel wire ropes and other tools; the traction paying-off construction needs an approach paying-off pulley, a hand-operated hoist and other tools; the accessories are provided with various tools and electric power fittings which need to enter the field. Various materials can reach a construction site by means of transportation tools.

In order to avoid densely populated areas, overhead transmission line towers are mostly located in mountainous areas with sparse population and poor transportation conditions, and transmission line projects often encounter complex and severe comprehensive road conditions such as mountains, mountains and hills, inadmissible vegetation cutting, narrow roads, muddy roads, no roads and the like, and the transportation difficulty is high.

In addition, the existing rail transport vehicle is generally only provided with a brake system at the machine head end, while the trailer end used for loading goods is generally braked passively, and in the field of overhead transmission line construction application, as the goods are sand and steel parts and the like with larger weight, the existing machine head brake mode is used for considering the heavy load inertia of the transport vehicle, the action of the brake system needs to be intervened in advance or the brake distance needs to be prolonged, and meanwhile, the performance loss of the brake system can be greatly increased.

Based on the above, the invention designs a mountain heavy-load double-track transport vehicle for overhead transmission line construction and a construction method thereof, so as to solve the problems.

Disclosure of Invention

The invention aims to provide a mountain heavy-load double-rail transport vehicle for overhead transmission line construction and a construction method thereof, and aims to solve the technical problems.

In order to realize the purpose, the invention provides the following technical scheme: a mountain heavy-load double-rail transport vehicle for overhead transmission line construction comprises a double-rail transport rail paved on an overhead transmission line, wherein a trailer used for bearing goods and a machine head used for pulling the trailer to advance are arranged on the double-rail transport rail, a roller component matched with the double-rail transport rail is arranged at the bottom of the trailer used for bearing the goods, the roller component comprises a disc brake sheet and hydraulic calipers used for active braking and stopping, the machine head and the trailer are connected through a pressure relief type buffer device, and a pressure relief bypass of the pressure relief type buffer device is in control connection with the hydraulic calipers;

the double-rail type transportation rail comprises a driving rail and an auxiliary rail parallel to the driving rail, and a driving rack is fixedly arranged at the bottom of the driving rail.

Preferably, the bottom of drive rail and supplementary rail is provided with the bracing piece, the bottom of bracing piece is embedded in the underground, the bracing piece is including directly propping formula and bracing formula, the distribution interval of directly propping formula and bracing formula is 3m and 6m respectively.

Preferably, the bottom of the machine head comprises a machine head support straddling two sides of the driving rail, a driving gear is rotatably mounted on the machine head support, and the driving gear is driven by the machine head power output end and is in meshed transmission with the driving rack for output.

Preferably, the tooth profiles of the driving gear and the driving rack are wave-shaped.

Preferably, the front end and the rear end of the trailer are respectively provided with a bracket for bearing goods.

Preferably, the roller assembly comprises a roller support and side protection plates arranged on two sides of the roller support, a pair of abutting joints are respectively arranged between the side protection plates through an upper wheel shaft and a lower wheel shaft on the double-rail type transportation rail, the disc brake sheet is arranged on the wheel shaft of the lower wheel group, and the hydraulic calipers matched with the disc brake sheet are arranged on the side protection plates.

Preferably, the atmospheric pressure formula buffer atmospheric pressure piston section of thick bamboo and spacing end cover of pressure release, the inner chamber of atmospheric pressure piston section of thick bamboo is provided with atmospheric pressure piston and buffering pressure spring, the atmospheric pressure piston has the connecting rod through ball hinged joint, the tip of connecting rod and the blind end of atmospheric pressure piston section of thick bamboo equally divide do not be provided with the universal hinge that trailer and aircraft nose are connected, pressing close to of atmospheric pressure piston section of thick bamboo the lateral wall of aircraft nose one end is provided with the relief valve, the main way of the pressure release of relief valve has connected gradually choke valve and muffler, the pressure release bypass of relief valve with hydraulic pressure calliper control connection.

Preferably, the pressure discharge bypass of the pressure release valve is communicated to a pneumatic-hydraulic conversion cylinder through a pipeline, a pneumatic-hydraulic conversion piston and a reset pressure spring are arranged in an inner cavity of the pneumatic-hydraulic conversion cylinder, hydraulic oil is filled in one side of the inner cavity of the pneumatic-hydraulic conversion cylinder, and one end of the pneumatic-hydraulic conversion cylinder, which is filled with hydraulic oil, is communicated with the control port of the hydraulic caliper through a pipeline.

A construction method of a mountain heavy-load double-track type transport vehicle for transporting construction materials of overhead transmission lines comprises the following steps:

step S10: track path exploration of the double-track type transportation track;

step S20: assembling and mounting the double-track type transportation track;

step S30: loading the sand and stone material into the trailer by manpower and then proceeding to step S50: or loading the long and heavy tower material on the bracket of the trailer by adopting a hoisting tool vehicle and then carrying out step S50;

step S40: performing anti-skid and anti-drop fixed binding on the long and heavy tower material;

step S50: the machine head is started to drive the trailer to transport the goods to a destination point along the double-track type transportation track;

step S60: unloading the goods from the trailer;

step S70: step S30 is executed until the transportation task is completed;

step S80: the transport vehicle leaves or changes the field and finishes the work task

Compared with the prior art, the invention has the beneficial effects that:

the mountain heavy-load double-track transport vehicle is special for transporting construction materials of overhead transmission lines in the power industry and is used for transporting materials such as sand materials, cement, hardware fittings, tools, towers and the like, the mountain heavy-load double-track transport vehicle provided by the application comprises a trailer with a bracket, the rated load of which can reach 1500kg or more, and the trailer can be transported on a double-track transport track laid on the overhead transmission lines through a gasoline engine head, so that the problems of high difficulty and low efficiency in transporting the construction materials of the overhead transmission lines in the power industry at present can be effectively solved;

furthermore, the wheel components of the mountain heavy-load double-track transport vehicle comprise a disc brake sheet and a hydraulic caliper, wherein the disc brake sheet and the hydraulic caliper are used for active braking, the machine head and the trailer are connected through a pressure release type buffer device, a pressure release bypass of the pressure release type buffer device is in control connection with the hydraulic caliper, when the machine head brakes, the pressure release type buffer device can utilize a pressure release and pressure spring energy absorption mode to release inertia stamping kinetic energy of the trailer slowly, and one path of air pressure led out by a pressure release valve is converted into a hydraulic control source to control the clamping effect of the hydraulic caliper in the wheel components, so that the active auxiliary braking of the trailer is realized, the impact effect of the loading trailer on the machine head during braking is reduced, the braking response enthusiasm of the transport vehicle is improved, and the performance loss of the heavy-load transport vehicle to a brake system during braking is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

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

FIG. 2 is a schematic top view of the dual-track type transportation track of the present invention;

FIG. 3 is a schematic view of the structure of the head part of the present invention;

FIG. 4 is a schematic structural diagram of the roller assembly of the present invention;

FIG. 5 is a schematic structural view of an active auxiliary braking part of the present invention;

FIG. 6 is a schematic view of the construction process of the present invention.

In the drawings, the reference numbers indicate the following list of parts:

1-double-rail type transportation rail, 101-driving rail, 102-auxiliary rail, 103-driving rack, 104-supporting rod, 2-trailer, 201-bracket, 3-machine head, 301-machine head bracket, 302-driving gear, 4-roller component, 401-roller bracket, 402-side guard plate, 403-ascending wheel set, 404-descending wheel set, 41-disc brake sheet, 42-hydraulic caliper, 43-pneumatic-hydraulic conversion cylinder, 44-pneumatic-hydraulic conversion piston, 45-reset pressure spring, 5-pressure relief type buffer device, 501-pneumatic piston cylinder, 502-limit end cover, 503-ball hinge, 504-connecting rod, 505-universal hinge, 506-buffer pressure spring, 507-pressure relief valve, 508-throttle valve, 509-silencer and 510-pneumatic piston.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: a mountain heavy-load double-rail transport vehicle for overhead transmission line construction comprises a double-rail transport rail 1 laid on an overhead transmission line, wherein the double-rail transport rail 1 is fixedly laid on a slope and can extend in any direction, the double-rail transport rail 1 comprises a driving rail 101 and an auxiliary rail 102 parallel to the driving rail 101, the auxiliary rail 102 mainly plays a role in bearing weight, a driving rack 103 is fixedly arranged at the bottom of the driving rail 101, and the tooth form of the driving rack 103 is wavy;

the bottom parts of the driving rail 101 and the auxiliary rail 102 are provided with supporting rods 104, the bottom ends of the supporting rods 104 are embedded underground, the supporting rods 104 comprise a straight supporting type and an inclined supporting type, and the distribution intervals of the straight supporting type and the inclined supporting type are respectively 3m and 6m;

a trailer 2 for bearing goods and a machine head 3 for drawing the trailer 2 to advance are arranged on the double-track type transportation track 1, the rated load of the trailer 2 reaches more than 1500kg, and brackets 201 for bearing the goods are respectively arranged at the front end and the rear end of the trailer 2 so as to be convenient for bearing, binding and fixing the tubular goods and the rod goods;

the bottom of the machine head 3 comprises a machine head support 301 straddling two sides of the driving rail 101, a driving gear 302 is rotatably arranged on the machine head support 301, the driving gear 302 is driven by a power output end of the machine head 3 and is meshed with the driving rack 103 for transmission and output, and the tooth form of the driving rack 103 is wavy; the machine head 3 is also provided with a corresponding gasoline host, a starting pull rope, an oil tank, a reversing handle, a braking device, a speed changing device and the like to form a complete gasoline machine head; when the engine works, the gasoline host is started to run by starting the pull rope, the gasoline host drives the driving gear 302 to rotate through the speed changing device, and the driving gear 302 is meshed with the driving rack 103, so that the engine head 3 and the trailer 2 are driven to move on the engine 1;

the bottom of a trailer 2 for bearing goods is provided with a roller assembly 4 matched with a double-rail type transportation rail 1, the roller assembly 4 comprises a roller support 401 and side protection plates 402 arranged at two sides of the roller support 401, a pair of an upper wheel set 403 and a lower wheel set 404 which are abutted to the double-rail type transportation rail 1 are respectively arranged between the side protection plates 402 at two sides through wheel shafts, and are used for keeping and limiting the contact connection relation between the trailer 2 and the double-rail type transportation rail 1, so that the trailer 2 stably runs on the double-rail type transportation rail 1, a disc brake sheet 41 is arranged on the wheel shaft of the lower wheel set 404, a hydraulic caliper 42 matched with the disc brake sheet 41 is arranged on the side protection plates 402, and the hydraulic caliper 42 can drive the brake sheet to be tightly clamped and attached to the disc brake sheet 41 after controlling oil circuit pressurization, so as to realize active braking;

the roller component 4 comprises a disc brake sheet 41 and a hydraulic caliper 42 which are used for active braking, the machine head 3 is connected with the trailer 2 through a pressure relief type buffer device 5, a pressure relief bypass of the pressure relief type buffer device 5 is in control connection with the hydraulic caliper 42, a pressure relief type buffer device 5 is provided with a pressure piston cylinder 501 and a limiting end cover 502, an inner cavity of the pressure piston cylinder 501 is provided with a pressure piston 510 and a pressure relief spring 506, when the transport vehicle is braked, the machine head is subjected to active deceleration braking, and therefore the trailer 2 located behind the traveling direction generates impact action of speed difference relative to the machine head;

the air pressure piston 510 is connected with the connecting rod 504 through a spherical hinge 503, the end part of the connecting rod 504 and the closed end of the air pressure piston cylinder 501 are respectively provided with a universal hinge 505 connected with the trailer 2 and the machine head 3, the trailer 2 pushes the air pressure piston 510 to move rightwards and simultaneously extrudes the buffering pressure spring 506, and the device consumes energy in the pressure relief process and the process of extruding the buffering pressure spring 506, so that the slow-release impact force and the braking deceleration effect are achieved; a pressure release valve 507 is arranged on the side wall of the end, close to the machine head 3, of the air pressure piston cylinder 501, a pressure release main path of the pressure release valve 507 is sequentially connected with a throttle valve 508 and a silencer 509, a pressure release bypass of the pressure release valve 507 is in control connection with the hydraulic caliper 42, the pressure release bypass of the pressure release valve 507 is controlled by adjusting the idle release flow of the throttle valve 508, namely the pressure release bypass of the pressure release valve 507 is controlled, namely the braking action force and speed of the hydraulic caliper 42 are controlled, and therefore the optimal braking sensitivity can be obtained through debugging;

the pressure discharge bypass of the pressure release valve 507 is communicated to an air-hydraulic pressure conversion cylinder 43 through a pipeline, an inner cavity of the air-hydraulic pressure conversion cylinder 43 is provided with an air-hydraulic pressure conversion piston 44 and a reset pressure spring 45, one side of the inner cavity of the air-hydraulic pressure conversion cylinder 43 is filled with hydraulic oil 46, one end of the air-hydraulic pressure conversion cylinder 43, which is filled with the hydraulic oil, is communicated with a control port of the hydraulic caliper 42 through a pipeline, when the transport vehicle is braked and stopped, the air-hydraulic pressure of the pressure release valve 507 discharge bypass pushes the air-hydraulic pressure conversion piston 44 to move right, so that the hydraulic pressure on the right side of the air-hydraulic pressure conversion cylinder 43 is compressed, and the brake pad of the hydraulic caliper 42 is controlled to clamp and attach to the disc brake pad 41, and active braking is realized.

As shown in fig. 6, a construction method of a mountain heavy-load double-track transport vehicle for transporting construction materials of overhead transmission lines includes the following steps:

step S10: track path exploration of the double-track type transportation track 1;

before construction operation, a field responsible person and a rail car installer go to a construction field for investigation. The prospecting comprises related information such as landform, geological conditions, transportation paths, transportation distances, material loading and unloading places and the like, statistics of types and weights of transported materials, field planning and determination of transportation paths and track starting points. The selection of the loading and unloading yards is convenient for the loading and unloading operation of the trucks and the rail type transport vehicles. The transportation path is selected to be a shorter route as far as possible so as to save cost and keep a safe distance with a power line and a communication line; meanwhile, the operability and safety of rail installation personnel are considered, and the installation workload is reduced; the slope can not exceed the maximum climbing slope of the rail car, and the curvature radius of the rail is not too small, so that the two ends of the longest tower material to be transported touch the rail, the ground or the mountain.

Step S20: assembling and installing the double-track type transportation track 1;

obstacles which may interfere the passing of other materials to be transported, such as a vehicle body, long tower materials and the like, including raised stones, soil piles, green plants and the like on the ground surface and mountains, are removed along the track in the laying process.

The track is formed by nesting and butting the head and the tail of a single section of square steel pipe with the length of 6m, and a rack with a transmission function is welded on the lower part of the guide rail. The track is installed and is arranged along ground in parallel, and the ground clearance is low, so that the operation safety is ensured. The rail camber is controlled by an installer through operation of a bend adjuster.

The rail is firmly and reliably erected and is installed as gently as possible, the rail is fixed on the ground through a steel pipe and upper and lower supporting seats, the distance between the supporting columns is 1.5m, the vertical supporting columns and the inclined supporting columns are driven into the soil to a solid layer, and the vertical supporting columns are kept vertical to the ground after being buried; the included angle between the inclined supporting column and the vertical supporting column is as large as possible on the premise of ensuring that the machine head and the trailer 2 can pass through. The auxiliary rail should be parallel to the main rail and should be installed as high as possible in principle.

After the track is laid, the installation and debugging personnel respectively lift the machine head 3 and the trailer 2 on the track 1 under the cooperation of the auxiliary workers and butt-joint and close the machine head and the trailer with the track rack. Then the nose 3 and the trailer 2 are connected by a pressure relief type buffer device 5.

Step S30: loading the bucket 2 with the grit material by human power is followed by step S50: or the hoisting tool vehicle is adopted to load the long and heavy tower material on the bracket 201 of the trailer 2 after the steel plate is paved, and then the step S50 is carried out;

the stacking point of the materials to be transported should be as close as possible to the departure point of the rail-mounted transport vehicle so as to reduce the loading and transferring distance; the stacking point after unloading should be as close as possible to the terminal parking space of the rail-mounted transport vehicle to reduce the unloading transfer distance.

A hoe shovel is needed by an on-site auxiliary worker to flatten and tamp the long and heavy tower material stacking point to the section of the ground of the trailer 2 of the transport vehicle, and then a steel plate is laid to facilitate the movement, work and passage of a small-sized hoisting tool. After the steel plates are laid, the feeding and discharging sites respectively enter one small-sized hoisting tool, a micro hydraulic forklift, a manual small crane, a small-sized movable portal frame and the like.

The sand and stone material is manually charged. The side edge sideboard of the transport cargo trailer 2 is opened before loading, and the bagged materials are lifted to the trailer 2 by two persons in a matching way. The sand and stone materials in bulk are loaded by using tools such as shovels and the like. When loading, the sand and stone material should be distributed in the transport loading trailer 2 as evenly as possible, and the loading capacity should not exceed the rated load of the transport vehicle. After loading, the side edge sideboard of the transport trailer 2 is closed.

The tower materials within 3m in length are arranged in the transport cargo trailer 2 and are distributed as uniformly as possible. The long and heavy tower material with the length exceeding 3m is arranged on a supporting frame on the trailer 2, the loading is completed by using a small hoisting tool with a roller, and the tower material can rotate, advance and retreat under the pushing of manpower. Irrelevant personnel should avoid the range of tower material gyration during loading, and the lifting or lowering actions should be smooth and steady.

Step S40: carrying out anti-skid and anti-drop fixed binding on the long and heavy tower material;

during loading, long and heavy tower materials are uniformly distributed on the tower material supporting frame to the greatest extent so as to ensure that the gravity center of the transport vehicle does not obviously deviate and the loading capacity does not exceed the rated load of the transport vehicle. After the long and heavy tower materials are arranged on the tower material supporting frame, reliable binding and fixing measures need to be taken to prevent slippage and falling.

Step S50: the machine head 3 is started to drive the trailer 2 to transport the goods to a destination point along the double-track type transportation track 1;

before using the machine, an operator should first be familiar with the names, functions and methods of operation and control mechanisms, switches of the electrical appliances, so as to operate and use the machine correctly. The transport vehicle is comprehensively checked before running at every time, and the transport vehicle does not need to be followed by personnel in the transportation process of an important measure for ensuring running safety, improving working efficiency and prolonging the service life of the transport vehicle, and is strictly forbidden to take the transport vehicle along with goods.

Step S60: unloading the goods from the trailer 2;

the sand and stone material is manually unloaded. The bagged material is generally lifted to a stockpiling point by two persons in cooperation. The sand and stone materials in bulk are unloaded by using tools such as a shovel and the like. The unloading of the long and heavy tower material is accomplished using small lifting tools at the discharge yard.

Step S70: step S30 is executed until the transportation task is completed;

and after unloading is finished, the operator in the unloading yard operates the transport vehicle to return to the loading yard. When the empty vehicle returns, people do not need to follow the vehicle, and the people are strictly prohibited to take the transport vehicle.

Step S80: and the transport vehicle returns or transfers, and the work task is finished.

In the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides an overhead transmission line construction is with mountain region heavy load double track formula transport vechicle which characterized in that: the double-rail type transportation rail comprises a double-rail type transportation rail (1) laid on an overhead transmission line, wherein a trailer (2) used for bearing goods and a machine head (3) used for drawing the trailer (2) to advance are arranged on the double-rail type transportation rail (1), a roller assembly (4) matched with the double-rail type transportation rail (1) is arranged at the bottom of the trailer (2) used for bearing the goods, the roller assembly (4) comprises a disc brake sheet (41) used for active braking and a hydraulic caliper (42), the machine head (3) and the trailer (2) are connected through a pressure relief type buffer device (5), and a pressure relief bypass of the pressure relief type buffer device (5) is in control connection with the hydraulic caliper (42);

the double-rail type conveying track (1) comprises a driving track (101) and an auxiliary track (102) parallel to the driving track (101), and a driving rack (103) is fixedly arranged at the bottom of the driving track (101);

the pressure relief type buffer device (5) comprises an air pressure piston cylinder (501) and a limiting end cover (502), an air pressure piston (510) and a pressure relief spring (506) are arranged in an inner cavity of the air pressure piston cylinder (501), the air pressure piston (510) is connected with a connecting rod (504) through a ball hinge (503), a universal hinge (505) connected with the trailer (2) and the machine head (3) is respectively arranged at the end part of the connecting rod (504) and the closed end of the air pressure piston cylinder (501), a pressure relief valve (507) is arranged on the side wall of the air pressure piston cylinder (501) close to one end of the machine head (3), a pressure relief main circuit of the pressure relief valve (507) is sequentially connected with a throttle valve (508) and a silencer (509), and a pressure relief bypass of the pressure relief valve (507) is in control connection with the hydraulic caliper (42);

the pressure discharge bypass of the pressure relief valve (507) is communicated to a pneumatic-hydraulic conversion cylinder (43) through a pipeline, a pneumatic-hydraulic conversion piston (44) and a reset pressure spring (45) are arranged in the inner cavity of the pneumatic-hydraulic conversion cylinder (43), hydraulic oil (46) is filled in one side of the inner cavity of the pneumatic-hydraulic conversion cylinder (43), and one end of the hydraulic oil filled in the pneumatic-hydraulic conversion cylinder (43) is communicated with a control port of the hydraulic caliper (42) through a pipeline.

2. The mountain heavy-load double-rail transport vehicle for overhead power transmission line construction according to claim 1, wherein: the bottom of drive rail (101) and supplementary rail (102) is provided with bracing piece (104), the bottom of bracing piece (104) is buried underground, bracing piece (104) are including directly propping formula and bracing formula, the distribution interval of directly propping formula and bracing formula is 3m and 6m respectively.

3. The mountain heavy-load double-rail transport vehicle for overhead power transmission line construction according to claim 1, wherein: the bottom of aircraft nose (3) including ride stride in aircraft nose support (301) of drive rail (101) both sides, rotate on aircraft nose support (301) and install drive gear (302), drive gear (302) by aircraft nose (3) power take off end drive and with drive rack (103) meshing transmission output.

4. The mountain heavy-load double-rail transport vehicle for overhead transmission line construction according to claim 3, wherein: the tooth profiles of the driving gear (302) and the driving rack (103) are wave-shaped.

5. The mountain heavy-load double-rail transport vehicle for overhead power transmission line construction according to claim 1, wherein: the front end and the rear end of the trailer (2) are respectively provided with a bracket (201) for bearing goods.

6. The mountain heavy-load double-rail transport vehicle for overhead power transmission line construction according to claim 1, wherein: the roller component (4) comprises a roller support (401) and side protection plates (402) arranged on two sides of the roller support (401), a pair of upward wheel set (403) and downward wheel set (404) which are abutted to the double-track type transportation track (1) are respectively arranged between the side protection plates (402) from top to bottom through a wheel shaft, the wheel shaft of the downward wheel set (404) is provided with the disc brake sheet (41), and the side protection plates (402) are provided with hydraulic calipers (42) matched with the disc brake sheet (41).

7. The construction method of the mountain heavy-load double-rail transport vehicle for the construction of the overhead power transmission line according to any one of claims 1 to 6, comprising the following steps:

step S10: track path exploration of the double-track type transportation track (1);

step S20: the double-track type transportation track (1) is assembled and installed;

step S30: loading the sand material into the trailer (2) by manpower and then proceeding to step S50: or a steel plate is paved on a bracket (201) of the trailer (2) by adopting a hoisting tool vehicle, then long and heavy tower materials are loaded, and then the step S50 is carried out;

step S40: carrying out anti-skid and anti-drop fixed binding on the long and heavy tower material;

step S50: the machine head (3) is started to drive the trailer (2) to transport the goods to a destination point along the double-track type transportation track (1);

step S60: unloading the goods from the trailer (2);

step S70: step S30 is executed until the transportation task is completed;

step S80: and the transport vehicle returns or transfers, and the work task is finished.

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