A Milling Machine for In-Situ Thermal Regeneration of Damaged Pavement and Its Usage Method

Abstract

The present invention provides a milling machine for on-site hot recycling of damaged road surfaces and its usage method, including a machine case. Inside the machine case, there are respectively a heating mechanism, a crushing mechanism, and a dust suction mechanism. At the top of the machine case, there is a storage mechanism, and the storage mechanism is respectively located at the top of the heating mechanism, the crushing mechanism, and the dust suction mechanism. The heating mechanism includes a heating chamber, a gas cylinder, a gas guide pipe, a on-off valve, a plurality of nozzles, and an igniter. The gas cylinder is installed inside the heating chamber. The output end of the gas cylinder is connected to the on-off valve. The bottom end of the on-off valve extends to the outside of the heating chamber and is communicated with one side of the gas guide pipe. The gas guide pipe is fixedly installed at the bottom end of the heating chamber. A plurality of the nozzles are installed on the outer wall of the gas guide pipe, and the igniters are respectively installed at one ends of the plurality of nozzles. The crushing mechanism includes a housing, a lifting frame, a crushing roller, a hydraulic cylinder, a driving motor, and a transmission assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, and particularly relates to a milling machine for in-situ hot recycling of damaged road surfaces and its usage method. Background Art

[0002] The road milling machine is one of the main types of machinery for asphalt pavement maintenance construction and one of the main equipment for asphalt concrete pavement maintenance construction. It is mainly used for the excavation and renovation of asphalt concrete surfaces of highways, urban roads, airports, freight yards, etc. It can also be used to remove defects such as pavement bumps, oil waves, reticulations, and ruts on the road surface. It can also be used to excavate road surface pits and grooves, as well as the roughening of cement pavements and the milling of surface step differences.

[0003] Currently, when the road milling machine is in operation, it is necessary to pre-treat the road surface at high temperature before the road surface can be broken. However, this method requires a large number of laborers, and once the connection is not timely, it may cause the temperature of the road surface to dissipate, which is not conducive to efficient milling work. Summary of the Invention

[0004] The embodiment of the present invention provides a milling machine for in-situ hot recycling of damaged road surfaces and its usage method to solve the problems raised in the background art.

[0005] In view of the above problems, the technical solution proposed by the present invention is as follows:

[0006] A milling machine for in-situ hot recycling of damaged road surfaces includes a machine case. Inside the machine case, there are respectively a heating mechanism, a crushing mechanism, and a dust suction mechanism. At the top of the machine case, there is a storage mechanism, and the storage mechanism is respectively located at the top of the heating mechanism, the crushing mechanism, and the dust suction mechanism. The heating mechanism includes a heating chamber, a gas cylinder, a gas conduit, a on-off valve, a plurality of nozzles, and an igniter. The gas cylinder is installed inside the heating chamber. The output end of the gas cylinder is connected to the on-off valve. The bottom end of the on-off valve extends to the outside of the heating chamber and is communicated with one side of the gas conduit. The gas conduit is fixedly installed at the bottom end of the heating chamber. A plurality of the nozzles are installed on the outer wall of the gas conduit, and the igniters are respectively installed at one ends of the plurality of nozzles. The crushing mechanism includes a housing, a lifting frame, a crushing roller, a hydraulic cylinder, a driving motor, and a transmission component. On both sides of the inner wall of the housing, there are respectively sliding grooves, and both sides of the lifting frame are respectively slidably connected to the inside of the two sliding grooves. The crushing roller is rotatably connected inside the lifting frame. The usage method of this milling machine includes the following steps:

[0007] S1. Measure the road surface: First, measure and record the dimensions of the damaged road surface, plan the travel route of this milling machine, and then make corresponding layout adjustments according to the specific road conditions;

[0008] S2. Calibration position: After the planning in step S1, the milling machine is moved to the designated construction section, and the direction of the milling machine is calibrated and adjusted until the travel route conforms to the planned layout. Then, by starting the milling machine, it moves slowly on the current section;

[0009] S3. High-temperature heating: By controlling the on-off valve, the gas cylinder is connected to the gas guide pipe, promoting the gas in the gas cylinder to flow into the interior of the gas guide pipe. And by starting the igniters inside multiple groups of nozzles, a high-temperature area is formed on the road surface at the bottom of the heating mechanism, and the road surface is continuously heated at high temperature until the road surface shows a soft state:

[0010] S4. Road surface crushing: After the heating treatment in step S3, the crushing mechanism is moved to the high-temperature section, and the lifting frame is pushed by the output end of the hydraulic cylinder, so that the lifting frame drives the crushing roller to move up and down until the bottom end of the crushing roller fits the high-temperature section. Then, by starting the driving motor, the output end of the driving motor drives the transmission component, thereby promoting the crushing roller to rotate, so as to facilitate the milling treatment of the bottom section;

[0011] S5. Collecting debris: By starting the negative pressure pump, it operates to extract and discharge inside the box body. And through the connection of the dust collection pipe, it collects the crushed stone waste on the milled section. Then, through the cooling effect of the condensation pipe, the crushed stone waste at a higher temperature is restored to the normal temperature;

[0012] S6. Conveying and transferring: After the collection in step S5, when the box body stores a sufficient amount of crushed stone waste, by starting the electric push rod, its output end pushes the connecting pin and abuts against the baffle until the baffle forms a discharge cavity with the box body, so as to facilitate the discharge of the crushed stone waste stored inside the box body. Then, by installing and using the belt conveyor, it conveys the fallen crushed stone waste back into the milling area and compacts it according to the specific conditions of the section.

[0013] In order to better implement the technical solution of the present invention, the following technical measures are also adopted.

[0014] As a preferred technical solution of the present invention, a hydraulic cylinder is installed at the top end inside the housing, and the output end of the hydraulic cylinder is connected to the top end of the lifting frame.

[0015] As a preferred technical solution of the present invention, a driving motor is installed inside the lifting frame, the output end of the driving motor is connected to the transmission component, and the driving motor is drivingly connected to one end of the crushing roller through the transmission component.

[0016] As a preferred technical solution of the present invention, the storage mechanism includes a box body, a negative pressure pump, a filter screen, a baffle, a movable seat, an electric push rod, a connecting pin and a rotating shaft. The negative pressure pump is embedded and installed at the top end of the box body, and the bottom end of the negative pressure pump is connected to the filter screen.

[0017] As a preferred technical solution of the present invention, a rotating shaft is installed on one side of the box body. The box body is hinged to one side of the baffle through the rotating shaft, and one side of the bottom end of the baffle is flush with the bottom end of the box body.

[0018] As a preferred technical solution of the present invention, a movable seat is installed at the bottom end inside the box body. The box body is rotatably connected to the electric push rod through the movable seat. One side of the baffle is slidably connected to the connecting pin, and one end of the connecting pin is rotatably connected to the output end of the electric push rod.

[0019] As a preferred technical solution of the present invention, the dust collection mechanism includes a heat preservation box, a condensing pipe and a dust collection pipe. The condensing pipe is installed inside the heat preservation box. The dust collection pipe is inserted through the inside of the condensing pipe. The bottom end of the dust collection pipe extends to the outside of the heat preservation box, and the top end of the dust collection pipe extends to the inside of the box body.

[0020] As a preferred technical solution of the present invention, a conveying mechanism is provided on one side of the dust collection mechanism. The conveying mechanism includes a belt conveyor and a base. The belt conveyor is installed at the top end of the base, and the top end of the belt conveyor is flush with one side of the storage mechanism.

[0021] As a preferred technical solution of the present invention, a clearance pushing plate is installed on one side of the outer wall of the chassis, and a lighting lamp is installed on one side of the outer wall of the storage mechanism.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] Through the sequential operation of the heating mechanism and the crushing mechanism, the milling machine realizes an integrated structure of heating and milling, and is convenient for efficient milling work. Among them, through the connection and blocking effects of the on-off valve, it can adjust the connection relationship between the gas cylinder and the gas guide pipe, so as to facilitate the gas in the gas cylinder to flow into the inside of the gas guide pipe. And by installing igniters inside multiple groups of nozzles, the road surface at the bottom end of the heating mechanism burns and forms a high-temperature area, so as to continuously heat the road surface at high temperature until the road surface becomes soft. Then, the output end of the hydraulic cylinder pushes the lifting frame, so that the lifting frame drives the crushing roller to move up and down until the bottom end of the crushing roller fits with the high-temperature section. Then, through the driving motor, the output end of the driving motor drives the transmission component, so as to promote the crushing roller to rotate, so as to facilitate the milling treatment of the bottom section of the road. In this way, the distance between the heating mechanism and the crushing mechanism is effectively reduced, thereby reducing the heat dissipation.

[0024] The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are specifically exemplified below. Description of the Drawings

[0025] Figure 1 It is a three-dimensional view of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention;

[0026] Figure 2 It is a schematic structural diagram of the chassis of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention;

[0027] Figure 3 It is a sectional view of the heating mechanism of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention;

[0028] Figure 4 It is a sectional view of the crushing mechanism of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention;

[0029] Figure 5 It is a partial sectional view of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention;

[0030] Figure 6 It is of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention Figure 5 Enlarged schematic view of structure A therein;

[0031] Figure 7 It is a flow chart of the usage method of a milling machine for in-situ hot recycling of damaged roads disclosed in an embodiment of the present invention.

[0032] Reference numerals: 100, chassis; 200, storage mechanism; 2001, box body; 2002, negative pressure pump; 2003, filter screen; 2004, baffle; 2005, movable seat; 2006, electric push rod; 2007, connection pin; 2008, rotating shaft; 300, obstacle clearing push plate; 400, conveying mechanism; 4001, belt conveyor; 4002, base; 500, lighting lamp; 600, heating mechanism; 6001, heating chamber; 6002, gas cylinder; 6003, gas guide pipe; 6004, on-off valve; 6005, nozzle; 6006, igniter; 700, crushing mechanism; 7001, housing; 7002, lifting frame; 7003, crushing roller; 7004, hydraulic cylinder; 7005, driving motor; 7006, transmission assembly; 800, dust suction mechanism; 8001, heat preservation box; 8002, condensation pipe; 8003, dust collection pipe. Specific Embodiment

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0034] Embodiment 1

[0035] Referring to the attached Figures 1-6 As shown, a milling machine for in-situ hot recycling of damaged roads includes a machine case 100. Inside the machine case 100, there are respectively arranged a heating mechanism 600, a crushing mechanism 700, and a dust suction mechanism 800. At the top of the machine case 100, there is a storage mechanism 200. The storage mechanism 200 is respectively located at the top of the heating mechanism 600, the crushing mechanism 700, and the dust suction mechanism 800. The heating mechanism 600 includes a heating chamber 6001, a gas cylinder 6002, a gas guide pipe 6003, a on-off valve 6004, a plurality of nozzles 6005, and an igniter 6006. The gas cylinder 6002 is installed inside the heating chamber 6001. The output end of the gas cylinder 6002 is connected to the on-off valve 6004. The bottom end of the on-off valve 6004 extends to the outside of the heating chamber 6001 and is communicated with one side of the gas guide pipe 6003. The gas guide pipe 6003 is fixedly installed at the bottom end of the heating chamber 6001. A plurality of nozzles 6005 are installed on the outer wall of the gas guide pipe 6003. One end of each of the plurality of nozzles 6005 is respectively installed with an igniter 6006. The crushing mechanism 700 includes a housing 7001, a lifting frame 7002, a crushing roller 7003, a hydraulic cylinder 7004, a driving motor 7005, and a transmission assembly 7006. On both sides of the inner wall of the housing 7001, there are respectively arranged sliding grooves. The two sliding grooves are respectively slidably connected to both sides of the lifting frame 7002. The crushing roller 7003 is rotatably connected inside the lifting frame 7002.

[0036] As an embodiment of the present invention, further, a hydraulic cylinder 7004 is installed at the top end inside the housing 7001. The output end of the hydraulic cylinder 7004 is connected to the top end of the lifting frame 7002.

[0037] As an embodiment of the present invention, further, a driving motor 7005 is installed inside the lifting frame 7002. The output end of the driving motor 7005 is connected to the transmission assembly 7006. The driving motor 7005 is drivingly connected to one end of the crushing roller 7003 through the transmission assembly 7006.

[0038] As an embodiment of the present invention, further, the storage mechanism 200 includes a box body 2001, a negative pressure pump 2002, a filter screen 2003, a baffle 2004, a movable seat 2005, an electric push rod 2006, a connection pin 2007, and a rotating shaft 2008. The negative pressure pump 2002 is embedded and installed at the top end of the box body 2001. The bottom end of the negative pressure pump 2002 is connected to the filter screen 2003.

[0039] In an embodiment of the present invention, further, a rotating shaft 2008 is installed on one side of the box body 2001. The box body 2001 is hinged to one side of the baffle 2004 through the rotating shaft 2008. One side of the bottom end of the baffle 2004 is flush with the bottom end of the box body 2001.

[0040] In an embodiment of the present invention, further, a movable seat 2005 is installed at the inner bottom end of the box body 2001. The box body 2001 is rotatably connected to an electric push rod 2006 through the movable seat 2005. One side of the baffle 2004 is slidably connected to a connecting pin 2007. One end of the connecting pin 2007 is rotatably connected to the output end of the electric push rod 2006.

[0041] In an embodiment of the present invention, further, the dust suction mechanism 800 includes a heat preservation box 8001, a condensation pipe 8002 and a dust collection pipe 8003. The condensation pipe 8002 is installed inside the heat preservation box 8001. The dust collection pipe 8003 is inserted through the condensation pipe 8002. The bottom end of the dust collection pipe 8003 extends to the outside of the heat preservation box 8001, and the top end of the dust collection pipe 8003 extends to the inside of the box body 2001.

[0042] In an embodiment of the present invention, further, a conveying mechanism 400 is provided on one side of the dust suction mechanism 800. The conveying mechanism 400 includes a belt conveyor 4001 and a base 4002. The belt conveyor 4001 is installed at the top end of the base 4002. The top end of the belt conveyor 4001 is flush with one side of the storage mechanism 200.

[0043] In an embodiment of the present invention, further, a road clearing push plate 300 is installed on one side of the outer wall of the chassis 100, and a lighting lamp 500 is installed on one side of the outer wall of the storage mechanism 200.

[0044] The embodiments of the present invention are also implemented through the following technical solutions.

[0045] Embodiment 2

[0046] Referring to the attached Figure 7 As shown, the present invention also proposes a use method of a milling machine for in-situ hot recycling of damaged roads, including the following steps:

[0047] S1. Measuring the road surface: First, measure and record the dimensions of the damaged road surface, plan the travel route of the milling machine, and then make corresponding layout adjustments according to the specific road conditions.

[0048] S2. Calibrating the position: After the planning in step S1, move the milling machine to the designated construction section, calibrate and adjust the direction of the milling machine until the travel route conforms to the planned layout, and then start the milling machine to make it move slowly on the current section.

[0049] S3. High-temperature heating: By controlling the on-off valve 6004, the gas cylinder 6002 is connected to the gas guide pipe 6003, so that the gas in the gas cylinder 6002 is dredged into the inside of the gas guide pipe 6003. And by starting the igniter 6006 inside multiple groups of nozzles 6005, a high-temperature area is formed on the road surface at the bottom end of the heating mechanism 600, and the road surface is continuously heated at high temperature until the road surface becomes soft:

[0050] S4. Road surface crushing: After the heating treatment in step S3, the crushing mechanism 700 moves to the high-temperature section. The output end of the hydraulic cylinder 7004 pushes the lifting frame 7002, so that the lifting frame 7002 drives the crushing roller 7003 to move up and down until the bottom end of the crushing roller 7003 fits the high-temperature section. Then, by starting the driving motor 7005, the output end of the driving motor 7005 drives the transmission component 7006, so as to promote the crushing roller 7003 to rotate, thus facilitating the milling process of the bottom section;

[0051] S5. Collecting debris: By starting the negative pressure pump 2002, it operates to draw in and out inside the box body 2001. And through the connection function of the dust collection pipe 8003, it collects the crushed stone waste of the milled section. Then, through the cooling function of the condensation pipe 8002, the crushed stone waste at a higher temperature is restored to the normal temperature;

[0052] S6. Conveying and transferring: After the collection in step S5, when the box body 2001 stores a sufficient amount of crushed stone waste, by starting the electric push rod 2006, its output end pushes the connecting pin 2007 and abuts against the baffle 2004 until the baffle 2004 and the box body 2001 form a discharge cavity, so as to facilitate the discharge of the crushed stone waste stored inside the box body 2001. Then, by installing and using the belt conveyor 4001, it conveys the fallen crushed stone waste back into the milled area and compacts it according to the specific conditions of the section.

[0053] It should be noted that the specific model specifications of the negative pressure pump 2002, the electric push rod 2006, the belt conveyor 4001, the lighting lamp 500, the on-off valve 6004, the igniter 6006, the hydraulic cylinder 7004 and the driving motor 7005 need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A milling machine for in-situ hot recycling of damaged road surfaces, characterized in that, It includes a chassis (100), inside which there are respectively a heating mechanism (600), a crushing mechanism (700) and a dust suction mechanism (800). At the top of the chassis (100), there is a storage mechanism (200), and the storage mechanism (200) is respectively located at the top of the heating mechanism (600), the crushing mechanism (700) and the dust suction mechanism (800). The heating mechanism (600) includes a heating chamber (6001), a gas cylinder (6002), a gas guide pipe (6003), a on-off valve (6004), a number of nozzles (6005) and an igniter (6006). The gas cylinder (6002) is installed inside the heating chamber (6001). The output end of the gas cylinder (6002) is connected to the on-off valve (6004). The bottom end of the on-off valve (6004) extends to the outside of the heating chamber (6001) and is communicated with one side of the gas guide pipe (6003). The gas guide pipe (6003) is fixedly installed at the bottom end of the heating chamber (6001). A number of the nozzles (6005) are installed on the outer wall of the gas guide pipe (6003). One ends of a number of the nozzles (6005) are respectively installed with the igniter (6006). The crushing mechanism (700) includes a housing (7001), a lifting frame (7002), a crushing roller (7003), a hydraulic cylinder (7004), a driving motor (7005) and a transmission component (7006). On both sides of the inner wall of the housing (7001), there are respectively chute grooves, and the two chute grooves are respectively slidably connected with both sides of the lifting frame (7002). The crushing roller (7003) is rotatably connected inside the lifting frame (7002). The storage mechanism (200) includes a box body (2001), a negative pressure pump (2002), a filter screen (2003), a baffle (2004), a movable seat (2005), an electric push rod (2006), a connecting pin (2007) and a rotating shaft (2008). One side of the dust suction mechanism (800) is provided with a conveying mechanism (400). The conveying mechanism (400) includes a belt conveyor (4001) and a base (4002). The belt conveyor (4001) is installed at the top of the base (4002). The top of the belt conveyor (4001) is flush with one side of the storage mechanism (200). The usage method of this milling machine includes the following steps: S1. Measure the road surface: First, measure and record the dimensions of the damaged road surface, plan the travel route of this milling machine, and then make corresponding layout adjustments according to the specific road conditions; S2. Calibrate the position: After the planning in step S1, move the milling machine to the designated construction section, calibrate and adjust the direction of the milling machine until the travel route conforms to the planned layout, and then start this milling machine to make it move slowly on the current section; S3. High-temperature heating: By controlling the on-off valve (6004), the gas cylinder (6002) is connected to the gas guide pipe (6003), promoting the gas in the gas cylinder (6002) to flow into the interior of the gas guide pipe (6003). Then, by starting the igniter (6006) inside multiple spray heads (6005), a high-temperature area is formed on the road surface at the bottom of the heating mechanism (600), and the road surface is continuously heated at high temperature until the road surface becomes soft: S4. Road surface crushing: After the heating treatment in step S3, the crushing mechanism (700) moves to the high-temperature section. The output end of the hydraulic cylinder (7004) pushes the lifting frame (7002), causing the lifting frame (7002) to drive the crushing roller (7003) to move up and down until the bottom end of the crushing roller (7003) fits the high-temperature section. Then, by starting the drive motor (7005), the output end of the drive motor (7005) drives the transmission component (7006), thereby promoting the crushing roller (7003) to rotate, facilitating the milling process of the bottom section of the road; S5. Collecting debris: By starting the negative pressure pump (2002), it operates to extract inside the box body (2001). Through the connection of the dust collection pipe (8003), it collects the crushed stone waste from the milled section of the road. Then, through the cooling effect of the condensation pipe (8002), the relatively high-temperature crushed stone waste returns to the normal temperature; S6. Conveying and transferring: After the collection in step S5, when the box body (2001) stores a sufficient amount of crushed stone waste, by starting the electric push rod (2006), its output end pushes the connecting pin (2007) and presses against the baffle (2004) until the baffle (2004) forms a discharge cavity with the box body (2001), facilitating the discharge of the crushed stone waste stored inside the box body (2001). Then, through the installation and use of the belt conveyor (4001), it conveys the fallen crushed stone waste back into the milled area and performs compaction treatment according to the specific conditions of the road section.

2. The milling machine for in-situ hot recycling of damaged road surfaces according to claim 1, wherein: A hydraulic cylinder (7004) is installed at the top end inside the housing (7001), and the output end of the hydraulic cylinder (7004) is connected to the top end of the lifting frame (7002).

3. The milling machine for in-situ hot recycling of damaged road surfaces according to claim 2, characterized in that: A drive motor (7005) is installed inside the lifting frame (7002). The output end of the drive motor (7005) is connected to the transmission component (7006), and the drive motor (7005) is drivingly connected to one end of the crushing roller (7003) through the transmission component (7006).

4. A milling machine for in-situ hot recycling of damaged road surfaces according to claim 1, characterized in that: A negative pressure pump (2002) is embedded and installed at the top end of the box body (2001), and the bottom end of the negative pressure pump (2002) is connected to the filter screen (2003).

5. A milling machine for in-situ hot recycling of damaged road surfaces according to claim 4, characterized in that: A rotating shaft (2008) is installed on one side of the box body (2001). The box body (2001) is hinged to one side of the baffle (2004) through the rotating shaft (2008), and the bottom end side of the baffle (2004) is flush with the bottom end of the box body (2001).

6. The milling machine for in-situ hot recycling of damaged road surfaces according to claim 5, wherein: An active seat (2005) is installed at the inner bottom end of the box body (2001). The box body (2001) is rotationally connected to an electric push rod (2006) through the active seat (2005). One side of the baffle (2004) is slidably connected to a connecting pin (2007). One end of the connecting pin (2007) is rotationally connected to the output end of the electric push rod (2006).

7. A milling machine for on-site hot recycling of damaged road surfaces according to claim 6, characterized in that: A condensing pipe (8002) is installed inside the incubator (8001). A dust collecting pipe (8003) is inserted into the condensing pipe (8002). The bottom end of the dust collecting pipe (8003) extends to the outside of the incubator (8001), and the top end of the dust collecting pipe (8003) extends to the inside of the box body (2001).

8. A milling machine for on-site hot recycling of damaged road surfaces according to claim 1, characterized in that: A clearance pushing plate (300) is installed on one side of the outer wall of the chassis (100), and a lighting lamp (500) is installed on one side of the outer wall of the storage mechanism (200).

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