CN216663688U

CN216663688U - Micro-surfacing paver

Info

Publication number: CN216663688U
Application number: CN202121887350.6U
Authority: CN
Inventors: 李维维
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-06-03
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a micro-surfacing paver with a minimally invasive punching and milling pretreatment function by utilizing high-pressure water flow, which comprises a rack, an internal combustion engine, a mineral hopper, a traveling device, a mineral aggregate transferring system, a water path transferring system, an asphalt transferring system, an operation platform, a punching and milling device, a stirring device and a paving device, wherein the internal combustion engine is connected with the rack through a pipeline; the punching and milling device performs minimally invasive punching and milling, washing and sprinkling pretreatment on the road surface in real time in the paving process. The problems of material leakage, material running and the like caused by the fact that the spreading device is lifted and slides along the trend due to impurities are solved; removing dust, oxide layers, unstable materials and the like on the original pavement; wetting the road surface and reducing the temperature of the road surface. The road surface cleanliness is obviously improved, the environment humidity is improved, and the interlayer adhesion of pavement is enhanced; the quality performance is excellent, the longitudinal edge is formed well, the occurrence of diseases is reduced, and the service life of the pavement is prolonged; the structure is simple, the operation and control are simple, the application is convenient, and the performance is stable, reliable and durable. Is suitable for construction in various operation surfaces and environments.

Description

Micro-surfacing paver

Technical Field

The utility model belongs to the field of engineering machinery required by road and airport construction, maintenance and repair and other pavement operations. In particular to a slurry seal vehicle and micro-surfacing paving equipment.

Background

Micro surfacing and slurry sealing technologies have become an important component in road construction and pavement maintenance and repair projects. The micro-surfacing and slurry sealing is that a slurry mixture is formed by continuously mixing stone grains or sand, stone powder, cement, water and additives with certain gradation with emulsified asphalt (high molecular polymer modified emulsified asphalt), then the mixture is quickly and uniformly spread on the road surface to be constructed, and then the processes of emulsion breaking, water separation, evaporation, solidification, forming and the like are carried out to form a sealing or rutting filler. The method can be used for performing preventive maintenance, early maintenance, rut filling and repairing, pavement appearance improvement and the like on the surface function of the road. The adhesive has the functions of adhesion, water resistance and the like in the lower sealing layer in the construction of the road surface and the airport runway. Effectively improve road service performance and prolong road service life. Micro-surfacing, slurry seal paving equipment and a construction technical method have important influence on construction quality and performance.

A great deal of research at home and abroad shows that the improper treatment between pavement layers is one of the important reasons causing the quality problem of micro-surfacing or slurry sealing pavement, because the original road surface layer and the slurry sealing or micro-surfacing surface layer are two materials and processes with different structures, if the interlayer binding force is insufficient, the load, especially heavy load and overload, caused by pavement driving is added alternately in four seasons in natural environment, and the interlayer extrusion and shearing deformation are continuously accumulated, so that the slurry sealing or micro-surfacing pavement has the defects of premature falling, cracks, pitted surface, pushing, uneven pavement and the like.

In addition, the existing equipment design scheme shows that: the effective power of the equipment is limited, and the functionality is single, so that the prior micro-surfacing pretreatment process for the pavement needs to be carried out in advance by using separate equipment. Therefore, the mineral aggregate which is scattered in the construction process can not be cleaned in time, and the sliding shoe of the paving device is inevitably lifted and out of control to slide, so that the quality problems of material leakage, material running and the like can be caused, and the paving quality and effect are directly influenced.

Particularly, the method for performing a pretreatment process on the road surface before the existing micro-surfacing construction operation generally adopts simple water spraying to play a role in wetting and cooling; before construction, the road surface is pretreated by adopting non-special cleaning equipment and a shoulder-back portable blower alone. The engineering practice reflects: the technical method has very limited road surface cleaning effect on the deposited ash layer, the asphalt oxide layer, the unstable material and the like of the original road surface; the watering amount is not scientifically and reasonably controlled, and redundant accumulated water is easily formed on the road surface and is not drained in time; obviously, the requirement of construction process design cannot be met. Therefore, the traditional micro-surfacing pretreatment construction process method is very labor-consuming, time-consuming, low in construction efficiency, large in occupied equipment and manpower, high in construction cost and uneconomical.

The above problems have not been solved effectively.

Disclosure of Invention

The utility model aims to solve the technical defects and discloses a micro-surfacing paver with a minimally invasive punching and milling pretreatment function. The method is characterized in that the technology of pretreatment, namely high-pressure water flow minimally invasive scouring and milling, scouring, washing, sprinkling, wetting, cooling and the like, is simultaneously carried out on the road surface in real time by the scouring and milling device in the process of implementing the paving operation of a micro-surfacing by virtue of the innovative design of the 'wet' minimally invasive scouring and milling pretreatment device. Therefore, the quality problems of material leakage, material leakage and the like caused by the fact that the sliding shoes of the paving device are lifted smoothly and slide out of control due to the fact that the sliding shoes of the paving device are caused by particle materials (such as scattered mineral materials during construction operation, residues left after milling and finishing the road surface and the like) on the road surface can be effectively solved; secondly, deposited ash layers, asphalt oxide layers, unstable materials and the like on the original pavement can be effectively removed; the water is sprayed again to moisten and cool the road surface, and the construction is carried out in high-temperature weather, so that the temperature of the ground road surface is reduced, the humidity of the road surface is improved, the demulsification speed is slowed down, and the bonding strength is improved. Thereby achieving the purposes of obviously enhancing the bonding force between the paving surface layers, having excellent paving quality performance and good longitudinal edge forming and reducing the occurrence of pavement diseases. The utility model has the advantages of economy, practicality, strong applicability, convenient and simple application, high efficiency, large output, stable, reliable and durable performance, energy conservation, environmental protection and prolonged service life of the pavement. Is suitable for construction in various working surfaces and environments.

In order to achieve the purpose, the utility model provides the following technical scheme: a micro-surfacing paver comprises a rack (chassis), an internal combustion engine, a hydraulic system, an air circuit system, a circuit system, an operation platform, a control system, a traveling device, a mineral hopper, a mineral aggregate transferring system, a water path transferring system, an asphalt transferring system, an additive adding system, a stirring device, an asphalt spraying device (selection), a flushing and milling device and a paving device. In the micro-surfacing construction operation process, the punching and milling device is used for carrying out minimally invasive punching and milling, scouring, washing, sprinkling, wetting, cooling and other pretreatment processes on the road surface in real time by a mode of jetting high-pressure water flow and a mode that a plurality of groups of water nozzles are regularly arranged to finally form a line or surface contact effect with the road surface. Effectively eliminate because of the granule material on the road surface, effectively clear away the deposit ash blanket, pitch oxide layer, the unstable material etc. on former road surface, moisten and cool down the road surface, will dash the waste material that mills simultaneously and arrange to treat construction road surface both sides with rivers fast and concentrate the collection. The method has the advantages of improving the cleanness of the road surface, improving the bonding strength, obviously enhancing the interlayer bonding force of the micro-surfacing paving surface, good longitudinal edge forming and excellent micro-surfacing paving quality performance.

In the scheme, the punching and milling device is preferentially arranged at a spatial position between the lower part of the rear part of the rack (chassis) and the rear parts of the traveling device and the front part of the paving device. Or can be arranged below the front part of the frame and in front of the walking device; or between the lower part of the middle part of the frame and the front wheels and the rear wheels (or the crawler belt) of the walking device.

The punching and milling device comprises a high-pressure water pump and a conventional water pump which are used as a water spraying pump, a water spraying rod, a water nozzle, a throttle valve, a flow dividing valve, a pressure increasing valve, a pressure reducing valve, a constant pressure valve, a reversing valve, a switch valve and the like. The water pump is connected with the water spray rod through a pipeline, the water spray heads are sequentially arranged on the water spray rod and communicated with the water spray rod, and the switch valve preferably selects the air cylinder to control the on-off of water spray. The high-pressure water pump, the conventional water pump, the pipeline, the throttle valve, the shunt valve, the booster valve, the reducing valve, the constant pressure valve, the reversing valve and the like control the flow, the flow speed and the pressure of the water discharged from the water nozzle.

The punching and milling device is provided with a punching and milling lifting mechanism. The punching and milling lifting mechanism is used for adjusting the distance between the water spray head and the road surface to change, and the optimal water spray ground clearance is guaranteed.

The punching and milling lifting mechanism comprises a telescopic oil cylinder or a telescopic air cylinder, and preferably adopts a hydraulic oil cylinder. One end of the telescopic hydraulic oil cylinder or the telescopic air cylinder is connected with the rack, the other end of the telescopic hydraulic oil cylinder or the telescopic air cylinder is connected with the water spray rod, the water spray rod and the water spray head are driven to rise and fall together, and the water spray head is ensured to reach the optimal water spray ground clearance. When the telescopic cylinder is selected, a guide telescopic rod sleeve is additionally arranged, one end of the guide telescopic rod sleeve is connected with the rack, and the other end of the guide telescopic rod sleeve is connected with the water spray rod, so that the stability and the reliability of the guide telescopic rod sleeve are improved; the telescopic cylinder and the guide telescopic rod sleeve jointly complete the driving of the water spray rod and the water spray head to be lifted and lowered together.

The punching and milling lifting mechanism can also adopt a connecting rod mechanism to realize the lifting and the lowering of a water spray rod and a water spray head. The punching and milling lifting mechanism further comprises a multi-connecting-rod mechanism and an oil cylinder or an air cylinder. One end of the multi-link mechanism is hinged with the water spray rod, the other end of the multi-link mechanism is hinged with the rack, and the link mechanism is driven by an oil cylinder or an air cylinder to drive the water spray rod and the water spray head to rise and fall together, so that the water spray head is ensured to reach the optimal water spray ground clearance.

The punching and milling device is provided with a water spraying steering mechanism, and the rotation of the water spraying steering mechanism drives a water spraying rod and a water spray head to rotate together to change the included angle between the water spray of the water spray head and the road surface. The rotary shaft sleeve design is adopted on the water spray rod to change the water spray posture of the water spray head so as to further adjust the included angle between the water spray of the water spray head and the road surface; the connecting rod mechanism can also be adopted to change the water spraying posture of the water spraying head so as to adjust the included angle between the water spraying of the water spraying head and the road surface. Thus ensuring the sprinkler head to reach the optimal water spraying angle.

The water flow control device comprises a water flow control device and a water pressure control device. The regulation and control of the water flow control device and the water pressure control device realize the change of the water outlet flow, the water outlet speed and the water outlet pressure of the water spray head by controlling a high-pressure water pump, a conventional water pump, a pipeline, a throttle valve, a flow divider valve, a pressure increasing valve, a pressure reducing valve, a constant pressure valve, a reversing valve and the like. The water flow control device and the water pressure control device are adjusted to realize the adjustment and control of the water outlet flow, the water outlet speed and the water outlet pressure of the water spray head, so as to achieve the optimal water spraying state.

The punching and milling device comprises a punching and milling telescopic device, and the punching and milling telescopic device has the expansion and contraction functions to change the effective working width of the punching and milling device. The punching and milling telescopic device comprises two forms: one is formed by more than two parallel water spray rods, and the expansion and contraction of the punching and milling device are realized by a slide rail or a guide telescopic sleeve on a water spray rod bracket to change the effective working width of the punching and milling device; the other water spraying rod is of an up-and-down swing arm type or horizontal folding type lengthening structure, one end of the lengthening water spraying rod is hinged and communicated with the (basic) water spraying rod, and the other end of the lengthening water spraying rod is suspended in the air. The left and the right of the punching and milling device are respectively provided with a lengthened water spraying rod, and the working width of the whole punching and milling device is changed by vertical or horizontal expansion and contraction of the lengthened water spraying rods.

The punching and milling telescopic device comprises a telescopic oil cylinder or a telescopic air cylinder, and the expansion and contraction functions of a sliding rail or a guide telescopic sleeve on the water spray rod support are driven by the expansion and contraction of the telescopic oil cylinder or the telescopic air cylinder, so that the whole working width of the punching and milling device is adjusted and changed, and a hydraulic oil cylinder is preferred.

The punching and milling device comprises a flushing mechanical lengthening device, and the flushing mechanical lengthening device comprises a lengthened water spraying rod and a water nozzle. The water spray head is arranged on the lengthened water spray rod, the lengthened water spray rod is mechanically connected with the water spray rod, and the water spray head, the lengthened water spray rod and the water spray rod are communicated. The whole working width of water spraying is increased.

The waterway transmission system comprises a water supply pump, a buffer water tank, a water supply pump, a water conveying pipeline, a water flowmeter and a water valve. The inlet and the outlet of the water supply pump are respectively connected with the water outlet of the water delivery wagon and the inlet pipeline of the buffer water tank and are used for delivering water on the delivery wagon into the buffer water tank; the buffer water tank is used for storing sufficient water; the inlet and the outlet of the water feeding pump are respectively connected with the cache water tank, the valve, the water flow meter and the water spraying rod pipeline to convey water to the water spray head.

In the scheme, the waterway diversion system is provided with a water metering device, the water cache tank is provided with a liquid level sensor, the water supply pump and the water supply pump adopt a variable water pump, or a variable hydraulic pump variable hydraulic motor or a variable frequency motor, and the water flow water pressure and the metering precision of the water of the waterway diversion system are cooperatively changed by adjusting the opening degree of a valve of a water pipeline.

Compared with the prior art, the utility model has the following advantages

1. The utility model discloses a micro-surfacing paver which has a wet-type flushing and milling pretreatment function and is used for carrying out minimally invasive flushing and milling, scouring, washing, watering, wetting, cooling and other pretreatment processes on a road surface in real time in the paving construction process. The design is suitable for construction operation under various operation surfaces and environments.

2. Improving the paving construction environment: the road surface can be cooled and the road surface humidity can be improved through water spraying, so that the early demulsification of the asphalt mixture is delayed, and the construction operation difficulty is effectively reduced. Is beneficial to pavement forming, enhances the binding power and obviously improves the paving quality.

3. High-energy, high-efficiency and high-quality: effectively removing deposited ash layers, asphalt oxide layers, unstable materials and the like on the original pavement; effectively eliminating the quality problems of material leakage, material running and the like caused by the granular materials on the road surface. Obviously enhance the interlayer adhesive force of the micro-surfacing paving surface, have excellent paving quality performance and good longitudinal edge forming, reduce the occurrence of pavement diseases and prolong the service life of the pavement.

4. The applicability and the popularization are strong: the design scheme is not only used on a continuous micro-surfacing paver integrating receiving, transferring and batching, spraying, minimally invasive pretreatment, stirring and paving, but also can be used for conveniently upgrading and improving the conventional vehicle-mounted micro-surfacing paver or a slurry seal vehicle and the like, and the structure and the system of the original equipment are not required to be changed.

5. Economic and environment-friendly: the construction efficiency is high, other equipment and manpower are not needed, the pavement pretreatment and the paving operation are completed at one time, and the method saves labor, trouble, time, economy, practicality, energy and environment.

6. The performance is stable and reliable: the design structure layout is compact and simple, and the design is scientific and reasonable. The working performance is reliable and stable, the use and the operation are easy, simple and convenient, and the device is multifunctional, multipurpose and intelligent. The use and maintenance cost is low, and the cost performance is high.

Drawings

The utility model is further illustrated by the following figures and examples, in which:

FIG. 1 is a schematic structural view (continuous type) of the scheme of the present invention.

Fig. 2 is a schematic structural diagram (vehicle-mounted) of the scheme of the utility model.

Fig. 3 is a partially enlarged view of the punching and milling device according to the scheme of the utility model.

Description of reference numerals:

1-a frame; 2-an internal combustion engine; 3-a transfer case; 4-a hydraulic system; 5, a gas path system; 6-circuitry;

7-operating the platform; 10-a walking device; 12-a mineral aggregate transport system; 13-a waterway transfer system;

14-asphalt transport system; 15-powder additive addition system; 16-liquid additive addition system;

18-a stirring device; 19-a spreading device;

22-a flushing device;

221-a water spray pump; 222-a water spray bar; 223-water spray head; 224-punching and milling lifting mechanism;

225-water spray steering mechanism; 226-impact milling telescoping device.

Detailed Description

The utility model is further described below with reference to the accompanying drawings:

example 1

As shown in figures 1 and 2, the micro-surfacing spreading machine comprises a frame (chassis) -1, an internal combustion engine-2, a transfer case-3, a hydraulic system-4, a gas circuit system-5, a circuit system-6, an operation platform (and a control system) -7, a traveling device-10, a mineral aggregate transferring system-12, a water circuit transferring system-13, an asphalt transferring system-14, a powder additive adding system-15, a liquid additive adding system-16, a stirring device-18, a spreading device-19 and a punching and milling device-22. In the micro-surfacing construction operation process, the punching and milling device-22 comprises a plurality of groups of water nozzles which are regularly arranged, a high-pressure water flow forms a sector, and finally forms a linear impact effect with the road surface, and processes such as high-pressure water flow minimally invasive punching and milling, scouring, washing, sprinkling, wetting, cooling and the like are carried out on the road surface in real time. Effectively eliminate the particle material on the road surface, for example: the quality problems of material leakage, material running and the like caused by the fact that the skid shoe of the paving device is lifted up in a following manner and slides out of control due to scattered mineral aggregates, residues left after milling and finishing the road surface and the like during construction operation. Effectively remove deposited ash layer, asphalt oxide layer, unstable material and the like on the original pavement. After water is sprayed, the effects of reducing the temperature of a ground surface and improving the humidity of a road surface can be achieved, and the demulsification speed is slowed down, and particularly, the water-spraying type demulsification agent is constructed in high-temperature weather. And simultaneously, quickly discharging the milled waste and water to two sides of the pavement to be constructed and collecting the waste and water in a centralized manner. The method has the advantages of improving the cleanness of the pavement, increasing the binding power, improving the binding strength, obviously enhancing the binding power between the micro-surfacing paving surface layers, having good longitudinal edge forming and excellent micro-surfacing paving quality performance.

As shown in fig. 1 and 2, the punching and milling device-22 is preferably arranged at a spatial position between the lower part of the rear part of the frame-1 and the rear part of the running device-10 and the front part of the spreading device-19.

As shown in figures 1 and 2, the punching and milling device-22 for the vehicle-mounted micro-surfacing paver and the slurry sealing vehicle is preferably designed below the front part of the machine frame-1 and in front of the walking device-10. It can also be designed between the front wheel and the rear wheel (or the crawler belt) of the running gear-10 under the middle part of the frame-1.

Example 2

As shown in fig. 1, 2 and 3, the punching and milling device-22 comprises a high-pressure water pump, a conventional water pump, a water spray pump-221, a water spray rod-222, a water spray head-223, a throttle valve, a flow dividing valve, a pressure increasing valve, a pressure reducing valve, a constant pressure valve, a reversing valve, a switch valve and the like. The water pump is connected with the water spray rod through a pipeline, the water spray heads are orderly arranged on the water spray rod and communicated with each other, and each water spray head switch is controlled by the cylinder to realize the on and off of water spray. The high-pressure water pump, the conventional water pump, the pipeline, the throttle valve, the flow divider, the pressure increasing valve, the pressure reducing valve, the constant pressure valve, the reversing valve and the like control the flow, the flow speed and the pressure of the water outlet of the sprinkler head.

Example 3

As shown in fig. 1 and 2, the punching and milling device-22 is designed with a punching and milling lifting mechanism-224. The punching and milling lifting mechanism-224 is used for realizing the change of the distance between the water spray heads-222 and the road surface, adjusting the water spray height when the water spray heads-222 work, the overlapping degree of water flow among the water spray heads when water is sprayed and the like.

Example 4

As shown in fig. 1 and 2, the punching and milling lifting mechanism-224 includes a telescopic oil cylinder or a telescopic air cylinder, preferably a hydraulic oil cylinder. One end of the telescopic hydraulic oil cylinder or the telescopic air cylinder is connected with the rack-1, and the other end of the telescopic hydraulic oil cylinder or the telescopic air cylinder is connected with the water spray rod-222 to drive the water spray rod and the water spray head to rise and fall together, so that the water spray head-223 is ensured to reach the optimal water spray ground clearance. When a telescopic cylinder is selected, a guide telescopic rod sleeve is preferentially added, one end of the guide telescopic rod sleeve is connected with the rack-1, and the other end of the guide telescopic rod sleeve is connected with the water spray rod-222, so that the stability and the reliability of the guide telescopic rod sleeve are improved; the telescopic cylinder and the guide telescopic rod sleeve jointly complete the driving of the water spray rod-222 and the water spray head-223 to rise and fall together, and the water spray head-223 is ensured to reach the optimal water spray ground clearance.

Example 5

As shown in fig. 1 and fig. 2, the punching and milling lifting mechanism-224 can also adopt a link mechanism to realize the lifting and lowering of the water spray rod-222 and the water spray head-223. The punching and milling lifting mechanism-224 comprises a connecting rod mechanism and an oil cylinder or an air cylinder, one end of the connecting rod mechanism is hinged with the water spraying rod-222, the other end of the connecting rod mechanism is hinged with the rack-1, and the connecting rod mechanism is driven by the oil cylinder or the air cylinder to drive the water spraying rod-222 and the water spray head-223 to rise and fall together, so that the water spray head-223 is ensured to reach the optimal water spraying ground clearance.

Example 6

As shown in figures 1 and 2, the punching and milling device-22 comprises a water spray steering mechanism-225, and the rotation of the water spray rod steering mechanism-225 drives the water spray heads-223 arranged on the water spray rods-222 to rotate together to change the size of an included angle between the water spray heads-223 and the road surface when the water spray heads-223 spray water. Preferably, a rotary shaft sleeve design is adopted on the water spray rod-222 to change the water spray posture of the water spray head-223 so as to further adjust the included angle between the water spray head-223 and the road surface; the link mechanism design can also be adopted to further adjust the included angle between the water spray of the water spray head and the road surface by changing the water spray posture of the water spray head-223.

Example 7

As shown in fig. 1 and 2, the water flow control device includes a water flow control device and a water pressure control device, and the control and adjustment of the water flow control device and the water pressure control device are realized by controlling a high-pressure water pump, a conventional water pump, a pipeline, a throttle valve, a flow divider valve, a pressure increasing valve, a pressure reducing valve, a constant pressure valve, a reversing valve and the like to change the adjustment of the water outlet flow, the water outlet speed and the water outlet pressure of the water spray head, so as to achieve the optimal water spray state.

Example 8

As shown in fig. 1 and 2, the punching and milling device-22 comprises a punching and milling telescopic device-226, and the punching and milling telescopic device-226 has an expansion and contraction function for changing the actual working width of the milling and brushing device-22. The punching and milling telescopic device-226 comprises two forms: one is formed by more than two parallel water spray rods, and the expansion and contraction of the punching and milling device are realized by a slide rail or a guide telescopic sleeve on a water spray rod bracket to change the working width of the punching and milling device; the other water spraying rod is of an up-and-down swing arm type or horizontal folding type lengthening structure, one end of the lengthening water spraying rod is hinged and communicated with the (basic) water spraying rod, and the other end of the lengthening water spraying rod is suspended in the air. The left and the right of the lengthened water spray rod respectively change the working width of the whole punching and milling device through the vertical or horizontal expansion and contraction of the lengthened water spray rods.

Example 9

As shown in fig. 1 and 2, the punching and milling telescopic device-226 includes a telescopic oil cylinder or a telescopic air cylinder, and the expansion and contraction of the telescopic oil cylinder or the telescopic air cylinder drives the expansion and contraction functions of a slide rail or a guide telescopic sleeve on the water spray rod bracket, so as to adjust and change the overall working width of the punching and milling device-22, preferably a hydraulic oil cylinder.

Example 10

The punching and milling device-22 comprises a flushing mechanical lengthening device, and the flushing mechanical lengthening device comprises a lengthening water spray rod and a water spray head-223. The water spray head-223 is arranged on the lengthened water spray rod which is mechanically connected with the water spray rod-222, and the water spray head-223, the lengthened water spray rod and the water spray rod-222 are communicated. The whole working width of water spraying is increased.

Example 11

The waterway transmission system comprises a water supply pump, a buffer water tank, a water supply pump, a water conveying pipeline, a water flowmeter and a water valve. The inlet and the outlet of the water supply pump are respectively connected with the water outlet of the water delivery wagon and the inlet pipeline of the buffer water tank and are used for delivering water on the delivery wagon into the buffer water tank; the buffer water tank is used for storing enough water; the inlet and the outlet of the feed pump are respectively connected with the buffer water tank, the valve, the water flowmeter and the water spray rod pipeline to deliver water to the water spray head.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all the simple modifications, changes, equivalent structural changes and construction method changes made by the technical essence of the present invention are still within the protection scope of the technical solution and method of the present invention.

Claims

1. A micro-surfacing paver structurally comprises a rack (1), an internal combustion engine (2), a control platform (7), a walking device (10), a mineral aggregate transferring system (12), a water path transferring system (13), an asphalt transferring system (14) and a stirring device (18), and is characterized by comprising a punching and milling device (22), wherein the punching and milling device (22) realizes minimally invasive punching and milling on a pavement, and the punching and milling device (22) is arranged below the rear part of the rack (1) and behind the walking device (10); or is arranged below the front part of the frame (1) and in front of the walking device (10); or between the lower part of the middle part of the frame (1) and the front and rear walking devices (10).

2. The micro-surfacing spreading machine according to claim 1, wherein the punching and milling device (22) comprises a water spray pump (221), a water spray bar (222) and a water spray head (223), the water spray pump (221) is connected with the water spray bar (222) through a pipeline, and the water spray head (223) is communicated with the water spray bar (222).

3. The micro-surfacing paver of claim 2, wherein the die milling device (22) further comprises a die milling elevator mechanism (224).

4. The micro-surfacing spreading machine according to claim 3, wherein the punching and milling lifting mechanism (224) comprises a telescopic oil cylinder or a telescopic air cylinder, one end of the telescopic oil cylinder or the telescopic air cylinder is connected with the other end of the frame (1) and is connected with the water spray rod (222) to drive the water spray rod (222) and the water spray head (223) to ascend and descend.

5. A micro-surfacing spreader according to claim 3, wherein the milling elevating mechanism (224) comprises an elevating linkage that drives the water jet (223) up and down.

6. A micro-surfacing spreader according to claim 1, wherein the milling device (22) comprises a water jet steering mechanism (225).

7. A micro-surfacing spreader according to claim 1, wherein the milling device (22) comprises a water flow control device.

8. The micro-surfacing spreading machine according to claim 1, wherein the punching and milling device (22) comprises a punching and milling telescopic device (226), and the punching and milling telescopic device (226) has an expansion and contraction function.

9. The micro-surfacing spreading machine according to claim 8, wherein the milling telescoping device (226) comprises a telescopic cylinder or telescopic cylinder, and the telescopic cylinder or telescopic cylinder drives the milling device (22) to expand and contract.

10. The micro-surfacing paver of claim 1, wherein the flushing and milling device (22) comprises a flushing mechanical extension device comprising an elongated water spray bar to achieve increased water spray working width.