CN108265590B - Hydraulic control system of microwave heating asphalt pavement in-situ heat regeneration device - Google Patents

Abstract

The invention discloses a hydraulic control system of an in-situ thermal regeneration device for microwave heating asphalt pavement. The geothermal regeneration device includes a main frame, a space adjustment device and a heating device. Universal wheels with locks are installed at the bottom of the main frame, and the space adjustment device includes an independent Three sets of three-way electric drive adjustment structures, each set of three-way electric drive adjustment structures are connected with a set of heating devices. The hydraulic control system uses the hydraulic pump as the power source and adopts the hydraulic control system to realize the movement control of the heating chamber along the X-axis, Y-axis, and Z-axis, which simplifies the cumbersome operations and reduces the labor intensity of workers. At the same time, it avoids the influence of experience and physical strength on the microwave heating effect in the process of manually adjusting the heating chamber, and ensures that the mouth surfaces of different heating chambers are always kept at the same level, thus ensuring that the coupling effect can always achieve the best effect.

Description

A hydraulic control system of a microwave-heated asphalt pavement hot-in-place regeneration device

technical field

The invention belongs to the technical field of microwave thermal regeneration of asphalt pavement, and in particular relates to a hydraulic control system of an in-situ thermal regeneration device for microwave heating of asphalt pavement.

Background technique

In recent years, with the vigorous development of highway traffic construction, asphalt concrete has been widely used in highway construction due to its excellent road performance and stable quality. By the end of 2012, more than 4 million kilometers of roads in China had been completed and opened to traffic, of which 95,000 kilometers were high-grade roads and sub-high-grade roads dominated by asphalt concrete pavements, ranking second in the world after the United States. Visible asphalt Concrete pavement is the main structural form of Chinese highway pavement. China began to build highways with asphalt pavements in the 1980s, and the general design life of asphalt pavements is 15 to 20 years. Therefore, the asphalt pavement highways built in China have entered the period of major and medium maintenance at the end of the 1990s. However, the hot-in-place regeneration technology of waste asphalt concrete has not yet been fully mastered in our country.

There are two methods of asphalt pavement thermal regeneration: plant-mix thermal regeneration and in-situ thermal regeneration. Plant-mixed hot regeneration is to transport the waste asphalt mixture to the mixing plant, then crush it, add a certain proportion of regenerant, new aggregate or new asphalt mixture, etc. to fully mix, and obtain the regeneration with excellent performance and meet the road performance. Asphalt concrete, and recompacted into a new asphalt pavement after regeneration. Hot-in-place regeneration of asphalt pavement is to use hot-in-place regeneration device to heat the damaged asphalt pavement on site, mill the softened waste asphalt concrete, and then add a certain proportion of new asphalt mixture and asphalt regeneration agent on the spot. , After multiple construction processes such as thermal mixing, paving and ironing, and rolling of on-site thermal regeneration equipment, the technology of repairing and regenerating damaged asphalt pavement can be realized at one time. Hot-in-place regeneration has been widely used in the maintenance and maintenance of waste asphalt pavement due to its advantages of compact process, simple process and good pavement maintenance quality.

The related research on hot-in-place regeneration technology of asphalt pavement in my country started relatively late, and it gradually gained widespread attention after entering the 21st century. After being successfully applied, the hot-in-place regeneration technology of asphalt pavement has gradually been recognized. The hot-in-place recycling technology of asphalt pavement is still in its infancy in China, and compared with other developed countries, it still needs further research.

Therefore, there is a need for a microwave-heated asphalt pavement thermal regeneration device to maintain the asphalt pavement. At present, most of the microwave heating devices used on the road cannot realize the spatial position control of the heating device, and it is difficult to quickly heat some complex roads, and the heating efficiency is not high. Therefore, it is necessary to design the in-situ thermal regeneration device for microwave heating asphalt pavement under the premise of considering the shape and size of the damaged asphalt pavement. At the same time, in order to prevent the electromagnetic waves emitted by the magnetron from leaking, it is necessary to consider shielding the leaked electromagnetic waves, and the shielding device should be installed on the in-situ heat regeneration device for microwave heating asphalt pavement as conveniently as possible.

Contents of the invention

Purpose of the invention: Aiming at the above-mentioned prior art, a hydraulic control system of a microwave-heated asphalt pavement hot-in-place regeneration device is proposed, which realizes the control of the microwave-heated asphalt pavement hot-in-place regeneration device, and improves the positioning accuracy and heating efficiency of the radiation cavity.

Technical solution: a hydraulic control system of a microwave-heated asphalt pavement hot-in-place regeneration device, the microwave-heated asphalt pavement hot-in-place regeneration device includes a main frame, a space adjustment device, and a heating device; the entire outer side of the main frame is provided with a metal shielding net , the bottom of the main frame is equipped with universal wheels with locks; the top of the main frame includes two first sliding guide rails parallel to each other, a coordinate system is established with one end of one of the sliding guide rails as the origin O, and the straight line where the sliding guide rail is located is The X-axis and the Y-axis are perpendicular to the X-axis and located on the same horizontal plane as the X-axis, and the Z-axis is perpendicular to the XOY plane;

The heating device and the space adjustment device include three groups respectively, and each group of space adjustment devices includes a second sliding guide rail that straddles the first sliding guide rail and slides along the X-axis through the first guide rail slider. A second guide rail slider that slides along the Y axis is installed on the sliding guide rail, and a vertical lifting mechanism is connected to the side of the second guide rail slider; the bottom of the vertical lifting mechanism is connected to a group of heating devices, and a temperature sensor is provided at the connection ; The X-axis hydraulic pump driving the first guide rail slider is installed on the first sliding guide rail, and the Y-axis hydraulic pump driving the second guide rail slider is installed on the second sliding guide rail; the vertical lifting mechanism includes a Z shaft hydraulic pump;

Each group of heating devices includes two microwave heaters arranged in parallel along the Y axis, each microwave heater includes a pyramidal horn-shaped radiation chamber and an excitation chamber connected to the radiation chamber, and the opposite group of excitation chambers The side wall is composed of a magnetron, and another group of opposite side walls of the excitation chamber is respectively provided with a connection port of the magnetron and a heat dissipation fan of the excitation chamber; each group of the heating device also includes a bracket, and Two third sliding guide rails are fixed in parallel along the Y axis, and two fourth sliding guide rails arranged in parallel are bridged on the third sliding guide rails, and the fourth sliding guide rails pass through the slider of the third guide rail and the third sliding guide rail. Sliding connection; each of the microwave heaters is slidably connected to the fourth sliding guide rail through fourth guide rail sliders fixed on both sides;

The hydraulic control system includes a plunger pump, a two-position four-way solenoid valve, an overflow valve, a pressure reducing valve, a first three-position four-way solenoid valve, a second three-position four-way solenoid valve, and a third three-position four-way solenoid valve. Valve, the first two-way hydraulic control check valve, the second two-way hydraulic control check valve, the third two-way hydraulic control check valve, the first one-way throttle valve, the second one-way throttle valve, the third one-way joint Flow valve, first pressure relay, first accumulator, second accumulator, second pressure relay, motor;

The motor drives the plunger pump to suck oil from the oil cylinder, and the oil outlet of the plunger pump is connected to the overflow valve, the pressure reducing valve, the third three-position four-way solenoid valve and the third three-position four-way solenoid valve through pipelines. oil inlet, the oil outlet of the overflow valve is connected to the oil cylinder; the two working ports of the two-position four-way solenoid valve are respectively connected to the oil inlet and oil outlet of the overflow valve, and the two-position four-way The oil inlet and the oil return port of the solenoid valve are connected to form a circuit; the oil inlets of the first three-position four-way solenoid valve and the second three-position four-way solenoid valve are respectively connected to the oil outlet of the pressure reducing valve; The two working ports of the first three-position four-way solenoid valve are connected to the first two-way hydraulically controlled one-way valve, and the first two-way hydraulically controlled one-way valve passes through the two first one-way throttle valves respectively. The first oil inlet and outlet port and the second oil inlet and outlet port of the X-axis hydraulic pump are connected, the first accumulator is connected to the first oil inlet and outlet port of the X-axis hydraulic pump, and the first pressure switch is connected to the The first accumulator; the two working ports of the second three-position four-way solenoid valve are connected to the second two-way hydraulic control check valve, and the second two-way hydraulic control check valve passes through the two second The one-way throttle valve is respectively connected to the first oil inlet and outlet port and the second oil inlet and outlet port of the Y-axis hydraulic pump, the second accumulator is connected to the first oil inlet and outlet port of the Y-axis hydraulic pump, and the first The second pressure relay is connected to the second accumulator; the two working ports of the third three-position four-way solenoid valve are connected to the third two-way hydraulic control check valve, and the third two-way hydraulic control check valve passes through The two third one-way throttle valves are respectively connected to the first oil inlet and outlet port and the second oil inlet and outlet port of the Z-axis hydraulic pump.

Further, the vertical lifting mechanism includes a mounting seat fixed on the side of the second guide rail slider, and a vertical through hole is opened on the mounting seat, and a thrust bearing is arranged in the vertical through hole; the Z-axis The hydraulic pump is installed vertically, its piston rod passes through the thrust bearing, the end of its cylinder body is in contact with the flat base ring of the thrust bearing, and the piston rod clamping structure is provided at the bottom of the mounting seat; the piston rod A collar is installed at the lower end, and the collar is fixed on the piston rod through a limit screw. The side of the collar is vertically fixedly connected to an L-shaped connecting plate, and the bottom end of the L-shaped connecting plate is connected to the heating device.

Further, the third guide rail slider and the fourth guide rail slider are provided with limiting structures.

Further, it also includes a fixed bracket, the fixed bracket includes a base and a collar that are fixedly connected to each other, the collar is sleeved on the cylinder body of the Z-axis hydraulic pump, and the base of the fixed bracket is fixed on the on the mount.

Further, the oil inlet of the plunger pump is connected with a filter.

Beneficial effects: the invention uses the hydraulic pump as the power source and adopts the hydraulic control system to realize the movement control of the heating chamber along the X-axis, Y-axis, and Z-axis, which simplifies the cumbersome operation and reduces the labor intensity of workers. At the same time, it avoids the influence of experience and physical strength on the microwave heating effect in the process of manually adjusting the heating chamber, and ensures that the mouth surfaces of different heating chambers are always kept at the same level, thus ensuring that the coupling effect can always achieve the best effect.

Description of drawings

Fig. 1 is the structural representation of microwave heating asphalt pavement thermal regeneration device in situ in the present invention;

Fig. 2 is the front view of microwave heating asphalt pavement thermal regeneration device in situ in the present invention;

Fig. 3 is the side view of microwave heating asphalt pavement thermal regeneration device in situ in the present invention;

Fig. 4 is a structural schematic diagram of the vertical lifting mechanism of the heating device;

Fig. 5 is a structural schematic diagram of a group of heating devices in a microwave heating asphalt pavement in-situ thermal regeneration device;

Fig. 6 is a schematic diagram of the installation structure of the magnetron and the radiation cavity in the heating device;

Fig. 7 is a schematic structural view of the hydraulic control system of the present invention;

Fig. 8 is a schematic diagram of coupling heating of a group of heating devices;

Figure 9 is the coupling simulation diagram of the radiation cavity, (a) is the coupling simulation diagram with the distance between the H surface and the H surface of the radiation cavity being 0 mm, (b) is the coupling simulation diagram with the distance between the H surface and the H surface of the radiation cavity being 10mm, and (c) is the radiation cavity The coupling simulation diagram of the cavity H surface and the H surface distance is 20mm.

Implementation

The present invention will be further explained below in conjunction with the accompanying drawings.

A hydraulic control system of a microwave-heated asphalt pavement hot-in-place regeneration device. As shown in Figure 1-3, the microwave-heated asphalt pavement hot-in-place regeneration device includes a main frame, a space adjustment device and a heating device. The main frame 1 is used to carry all heating devices and space adjustment devices, and bears most of the weight. Therefore, the steel plate is used as the manufacturing material, and the main frame with steel as the casting material has sufficient load-bearing rigidity and load-bearing strength, so no compression will occur Deformation situation. The whole outside of the main frame is provided with a metal shielding net, and the bottom of the main frame is equipped with a universal wheel 3 with locks. The top of the main frame includes two first sliding guide rails 8 that are parallel to each other. A coordinate system is established with one end of one of the sliding guide rails as the origin O, and the straight line where the sliding guide rail is located is the X axis, and the Y axis is perpendicular to the X axis and aligned with the X axis. The axes are located on the same horizontal plane, and the Z axis is perpendicular to the XOY plane.

The heating device and the space adjustment device include three groups respectively, and each group of space adjustment devices includes a second sliding guide rail 11 that bridges over the first sliding guide rail 8 and slides along the X-axis through the first guide rail slider 9. On the second sliding guide rail, A second guide rail slider 10 sliding along the Y axis is installed, and a vertical lifting mechanism is connected to the side of the second guide rail slider 10 . A group of heating devices are connected to the bottom of the vertical lifting mechanism, and a temperature sensor 12 is arranged at the connection. The X-axis hydraulic pump 17 that drives the first guide rail slider 9 is installed on the first sliding guide rail 8, and the Y-axis hydraulic pump 19 that drives the second guide rail slider 10 is installed on the second sliding guide rail 11. The vertical lifting mechanism includes a Z-axis Hydraulic pump 18.

As shown in Figure 4, the vertical lifting mechanism includes a mounting seat 10 fixed on the side of the second guide rail slider, and a vertical through hole is provided on the mounting seat 10, and a thrust bearing is arranged in the vertical through hole. The Z-axis hydraulic pump 18 is vertically arranged, its piston rod passes through the thrust bearing, and the end of its cylinder body is in contact with the flat base ring of the thrust bearing, and the bottom of the mounting seat 10 is provided with a piston rod clamping structure. A fixed bracket 25 is also included. The fixed bracket 25 includes a base and a collar fixedly connected to each other. The collar is sleeved on the cylinder body of the Z-axis hydraulic pump 18 , and the base of the fixed bracket 25 is fixed on the mounting base 10 . A collar 24 is installed at the lower end of the piston rod, and the collar 24 is fixed on the piston rod by a stop screw. The sides of the collar 24 are vertically fixedly connected to the L-shaped connecting plate 7, and the bottom end of the L-shaped connecting plate 7 is connected to the heating device. Its working principle is that the Z-axis hydraulic pump cylinder acts on the flat base ring of the thrust bearing that can bear axial force, and the L-shaped connecting plate connected at the end is driven by the piston rod passing through the vertical through hole of the mounting seat 10. 7 Perform movement along the Z axis. The L-shaped connecting plate 7 is connected to the collar 24 by a screw 23, and the position where the L-shaped connecting plate 7 is connected to the piston rod can be adjusted by the limit screw on the collar 24 according to the actual height. The cylinder blocks are connected by thrust bearings to facilitate adjustment of the angle of the connected heating device in the horizontal direction by rotating the Z-axis hydraulic pump 18, so as to have a better coupling effect when adapting to some special heating areas. In order to prevent the Z-axis hydraulic pump 18 from rotating freely in the horizontal direction, its rotation is limited by the piston rod clamping structure at the bottom of the mounting base 10 and the bracket 25 connected to the cylinder body.

As shown in FIG. 6 , each group of heating devices includes two microwave heaters arranged in parallel along the Y axis, and each microwave heater includes a pyramidal horn-shaped radiation cavity 4 and an excitation cavity 26 connected to the radiation cavity. One set of opposite side walls of the excitation chamber 26 is composed of magnetrons 6 , and the other set of opposite side walls of the excitation chamber are respectively provided with a connection port 28 of the magnetron and a cooling fan 5 of the excitation chamber. As shown in Figure 5, each group of heating devices also includes a bracket 22, on which two third sliding guide rails 21 are fixed in parallel along the Y axis, and two fourth sliding guide rails arranged in parallel are straddled on the third sliding guide rail 21 15 , the fourth sliding guide rail 15 is slidably connected to the third sliding guide rail 21 through the third guide rail slider 20 . Each microwave heater is slidably connected to the fourth sliding guide rail 15 through the fourth guide rail slider 14 fixed on both sides. The third guide rail slider 20 and the fourth guide rail slider 14 are provided with limiting structures for fixing the relative positions of the guide rail slider and the sliding guide rail.

Under the influence of the temperature generated by the magnetron below, the sensor 12 will produce a resistance effect, which will be converted by the internal processing unit to generate a differential voltage signal, which will be converted into a standard analog signal or digital signal by the amplifier through the amplifier, thereby Realize real-time monitoring of asphalt pavement temperature.

In order to enable the whole device to thermally regenerate the damaged road surface conveniently, a universal wheel with lock is designed under the main frame of the device, which not only facilitates the movement of the device, but also regenerates the damaged asphalt road with a certain slope. During on-site repair, the universal wheel is locked to prevent the device from moving and deviating from the damaged road surface that needs to be repaired during in-situ thermal regeneration repair.

As shown in Figure 7, the hydraulic control system includes a plunger pump 102, a two-position four-way solenoid valve 103, an overflow valve 104, a pressure reducing valve 105, a first three-position four-way solenoid valve 106, a second three-position four-way solenoid valve Valve 107, third three-position four-way solenoid valve 108, first two-way hydraulic control check valve 109, second two-way hydraulic control check valve 110, third two-way hydraulic control check valve 111, first one-way throttle valve 112 , the second one-way throttle valve 113 , the third one-way throttle valve 114 , the first pressure relay 115 , the first accumulator 116 , the second accumulator 119 , the second pressure relay 120 , and the motor 122 .

The motor 122 drives the plunger pump 102 to suck oil from the oil cylinder, and the oil outlet of the plunger pump 102 is connected to the overflow valve 104, the pressure reducing valve 105, the third three-position four-way solenoid valve 108 and the third three-position four-way solenoid valve through pipelines. The oil inlet of the valve 108 and the oil outlet of the relief valve 104 are connected to the oil cylinder. The two working ports of the two-position four-way solenoid valve 103 are respectively connected to the oil inlet and the oil outlet of the overflow valve 104, and the oil inlet and the oil return port of the two-position four-way solenoid valve 103 are connected to form a circuit. The oil inlets of the first three-position four-way solenoid valve 106 and the second three-position four-way solenoid valve 107 are respectively connected to the oil outlets of the pressure reducing valve 105 . The two working ports of the first three-position four-way solenoid valve 106 are connected to the first two-way hydraulic control check valve 109, and the first two-way hydraulic control check valve 109 is respectively connected to the X-axis hydraulic pressure through two first one-way throttle valves 112. The first oil inlet and outlet port and the second oil inlet and outlet port of the pump 17 , the first accumulator 116 is connected to the first oil inlet and outlet port of the X-axis hydraulic pump 17 , and the first pressure switch 115 is connected to the first accumulator 116 . The two working ports of the second three-position four-way solenoid valve 107 are connected to the second two-way hydraulic control check valve 110, and the second two-way hydraulic control check valve 110 is respectively connected to the Y-axis hydraulic pressure through two second one-way throttle valves 113. The first oil inlet and outlet port and the second oil inlet and outlet port of the pump 19 , the second accumulator 119 is connected to the first oil inlet and outlet port of the Y-axis hydraulic pump 19 , and the second pressure switch 120 is connected to the second accumulator 119 . The two working ports of the third three-position four-way solenoid valve 108 are connected to the third two-way hydraulic control check valve 111, and the third two-way hydraulic control check valve 111 is respectively connected to the Z-axis hydraulic pressure through two third one-way throttle valves 114. The first oil inlet and outlet and the second oil inlet and outlet of the pump 18.

In the hydraulic control system, the plunger pump 102 is connected to the motor 122 through a coupling, and the motor 122 provides mechanical energy for the plunger pump 102 to absorb oil from the oil cylinder and supply oil to the system. The oil supplied by the pump is used to control the operation of the entire hydraulic system through the overflow valve 104 and the pressure reducing valve 105 . Three two-way hydraulically controlled one-way valves are arranged side by side for locking and are used to ensure the synchronous operation of the regulating system. The first one-way throttle valve 112 , the second one-way throttle valve 113 and the third one-way throttle valve 114 are used to control the expansion and contraction speed of each hydraulic pump, so that the expansion speed is fast and the contraction speed is slow.

It is inevitable that there will be some pollutants in the hydraulic oil, such as dust, metal falling off the surface of the parts in the system, etc. The above-mentioned pollutants will cause great damage to the hydraulic components. An oil suction filter 101 is installed between the plunger pump 102 and the oil cylinder. The filter 101 can effectively ensure that the oil supplied to the system is clean and reliable, which is also conducive to the long-term stable operation of the system. The overflow valve 104 between the two-position four-way solenoid valve 103 and the pressure reducing valve 105 can control the operating speed of the entire system. A pressure measuring assembly is connected between the overflow valve 104 and the two-position four-way solenoid valve 103, and the pressure measuring assembly is composed of a cut-off valve and a pressure gauge for detecting pressure.

When the two-position four-way electromagnetic valve 103 stops in the middle, the whole system is in a stopped state. When the first three-position four-way solenoid valve 106 and the second three-position four-way solenoid valve 107 stop at the left side, the X-axis hydraulic pump 17 is in a stretched motion state. When the first three-position four-way solenoid valve 106 is on the left and the second three-position four-way solenoid valve 107 is on the right, the X-axis hydraulic pump 17 is in a shrinking motion state. When the first three-position four-way solenoid valve 106 stops on the right side and the second three-position four-way solenoid valve 107 stops on the left side, the X-axis hydraulic pump 17 is in a shrinking motion state. When the first three-position four-way solenoid valve 106 and the second three-position four-way solenoid valve 107 are all stopped on the right, the X-axis hydraulic pump 17 is in an extended state of motion. When the second three-position four-way solenoid valve 107 stops in the middle, the X-axis hydraulic pump 17 is in a non-working state. The Y-axis hydraulic pump 19, the Z-axis hydraulic pump 18 and the X-axis hydraulic pump 17 perform the same action, and each hydraulic cylinder can be independently controlled, and the execution speed can also be independently controlled.

When utilizing the device of the present invention to perform in-situ thermal regeneration of the microwave-heated asphalt pavement, firstly, the main frame of the universal wheel with locks is moved and fixed to the pavement to be repaired. Then, the three sets of heating devices arranged in parallel are independently adjusted by three-way electric drive, so that the heating area of the heating device covers the road surface to be repaired. Then adjust the two microwave heaters in the same group of heating devices separately, so that the radiation chambers of the two microwave heaters are at the same level; finally, manually adjust the slider guide rails directly connected to the heating devices so that the gap between the H surfaces of the two microwave heaters The distance is less than 10 mm to achieve heater coupling.

Each group of heating devices includes two microwave heaters arranged in parallel along the Y axis, the purpose is to make the magnetrons generate electromagnetic fields while being coupled to each other, so as to obtain the optimal heating effect. Under the same energy consumption, Get maximum heating efficiency and thus save energy. The connection port 28 is used to connect the high-voltage power supply. When the power supply is turned on, the magnetron 6 will generate an electromagnetic field to act on the asphalt pavement below. Under the action of the electromagnetic field, the polar molecules in the asphalt pavement begin to move violently. Rubbing and colliding with each other, under the action of polar molecules, the temperature of the asphalt pavement increases accordingly, thereby realizing the in-situ thermal regeneration of the asphalt pavement.

As shown in Figure 9, in the process of electromagnetic wave heating, the interaction and interaction of two or more electromagnetic fields are considered. When the radiation cavity is at the same level, microwave coupling occurs in the Y-axis direction. Microwave belongs to electromagnetic wave, and the propagation law of microwave conforms to Maxwell's wave equation. It can be seen that the plane wave generated by the magnetron along the Z direction passes through the guided wave of the radiation cavity, and only the electric field intensity E in the X-axis direction and the magnetic field intensity H in the Y-axis direction propagate along the Z-axis. When multiple magnetrons are heated at the same time, if the electric fields and magnetic fields generated by them are at the same level, coupling will occur. Through COMSOL simulation, it can be seen that when the distance between the H surfaces of the two pyramid horn radiation chambers is 0 coupling heating, the heating area has obvious coupling phenomenon, that is, the heating area when the distance between the H surface and the H surface of the pyramid horn radiation cavity is 0 coupling The effective heating area inside becomes larger and basically fills the entire radiation cavity. The y direction of the effective heating area is symmetrical to the center line of the pyramid horn mouth surface in the x direction, and the x direction of the effective heating area is symmetrical to the coupling joint. The optimal heating area is not at the center of the pyramid horn radiating cavity, but at the coupling of two pyramid horn radiating cavities. Therefore, under the same power, the heating efficiency at the coupling is the highest. As shown in Figure 9, the distances between the H surfaces of the pyramidal horn radiation cavity are 0, 10 mm, and 20 mm, respectively.

Each heating device can be independently adjusted along the XYZ direction. When the in-situ heat regeneration device is heating a damaged road surface with a certain inclination, in order to enable coupling between different heating devices and achieve the optimal heating distance, the vertical lift can be controlled. mechanism to adjust the height of different heating devices along the Z-axis direction, and then manually adjust the X-axis and Y-axis guide rail sliders inside the heating device, so that the heating surface of the radiation chamber in different heating devices can always be kept at the same horizontal position, so that a The two heaters in the group of heating devices are coupled on the Y axis. Similarly, through adjustment, the coupling of different groups of heating devices on the X axis can also be realized at the same time.

Magnetron 6 not only can produce electromagnetic wave when working, self also can produce higher temperature, in order to prevent the excessive temperature that produces from burning magnetron, cooling fan 5 adopts the mode of air-cooling to cool down, makes the cooling fan 5 The wind directly blows to the cooling fins of the magnetron 6. Although the power of the cooling fans 5 is small, they only generate airflow in a relatively small range to form a good circulation of cold and hot airflows and enhance the heat dissipation effect.

In order to facilitate the movement of the in-situ heat regeneration device, when designing the metal shielding device, a layer of metal shielding net is installed directly on the periphery of the main frame of the device. The entire device is covered with a metal shielding net, the main function of which is to shield some of the leaked electromagnetic radiation and prevent the leaked electromagnetic radiation from endangering the health of the operator and the surrounding environment. When moving the device, it is enough to directly push the device to move, and there is no need to move the metal shielding net, saving time and manpower.

The hydraulic control system of the microwave-heated asphalt pavement hot-in-place regeneration device of the present invention uses a hydraulic pump as a power source to operate different heating devices at the same time, so that different heating devices can be heated at different heights at the same time, ensuring heating When the device performs microwave heat regeneration on some sloped damaged road surfaces, it can also ensure coupling and achieve optimal heating conditions. At the same time, the way of controlling the movement is more convenient and accurate. Its adjustment range is larger and its adaptability is strong. It can adapt to damaged asphalt pavements with different slopes and irregular areas, and meet the repair needs in real life.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (5)

1. A hydraulic control system of a microwave-heated asphalt pavement hot-in-place regeneration device, characterized in that: the microwave-heated asphalt pavement hot-in-place regeneration device includes a main frame, a space adjustment device and a heating device; the entire outer side of the main frame is equipped with Metal shielding net, universal wheels with locks (3) are installed at the bottom of the main frame; the top of the main frame includes two first sliding guide rails (8) parallel to each other, and a coordinate system is established with one end of one sliding guide rail as the origin O , taking the straight line where the sliding guide rail is located as the X-axis, the Y-axis is perpendicular to the X-axis and located on the same horizontal plane as the X-axis, and the Z-axis is perpendicular to the XOY plane; The heating device and the space adjustment device respectively include three groups, and each group of space adjustment devices includes a second slide that straddles the first slide rail (8) and slides along the X axis through the first guide rail slider (9). Guide rail (11), the second guide rail slider (10) sliding along the Y axis is installed on the second sliding guide rail, and the side of the second guide rail slider (10) is connected with a vertical lifting mechanism; the vertical lifting mechanism A set of heating devices is connected at the bottom, and a temperature sensor (12) is arranged at the connection; an X-axis hydraulic pump (17) driving the first guide rail slider (9) is installed on the first sliding guide rail (8), and the The Y-axis hydraulic pump (19) driving the second guide rail slider (10) is installed on the second sliding guide rail (11); the vertical lifting mechanism includes a Z-axis hydraulic pump (18); Each set of heating devices includes two microwave heaters arranged in parallel along the Y axis, and each microwave heater includes a pyramidal horn-shaped radiation cavity (4) and an excitation cavity (26) connected to the radiation cavity. The opposite set of side walls of the excitation chamber (26) is composed of a magnetron (6), and the other set of opposite side walls of the excitation chamber are respectively provided with the connection port (28) of the magnetron and the cooling fan of the excitation chamber (5); each set of heating devices also includes a bracket (22), on which two third sliding guide rails (21) are fixed parallel to the Y axis, and on the third sliding guide rails (21) Two fourth sliding guide rails (15) arranged in parallel are bridged, and the fourth sliding guide rails (15) are slidingly connected with the third sliding guide rails (21) through the third guide rail sliders (20); each of the microwave The heater is slidably connected to the fourth sliding guide rail (15) through the fourth guide rail slider (14) fixed on both sides; The hydraulic control system includes a plunger pump (102), a two-position four-way solenoid valve (103), an overflow valve (104), a pressure reducing valve (105), a first three-position four-way solenoid valve (106), a second The second three-position four-way solenoid valve (107), the third three-position four-way solenoid valve (108), the first two-way hydraulic control check valve (109), the second two-way hydraulic control check valve (110), the third two-way Hydraulic control check valve (111), first one-way throttle valve (112), second one-way throttle valve (113), third one-way throttle valve (114), first pressure relay (115), The first accumulator (116), the second accumulator (119), the second pressure switch (120), and the motor (122); The motor (122) drives the plunger pump (102) to suck oil from the oil cylinder, and the oil outlet of the plunger pump (102) is connected to the overflow valve (104), the pressure reducing valve (105) and the third three The oil inlet port of the four-position solenoid valve (108), the oil outlet port of the relief valve (104) is connected to the oil cylinder ; the two working ports of the two-position four-way solenoid valve (103) are respectively connected to the relief valve The oil inlet and outlet of the valve (104), the oil inlet and the oil return port of the two-position four-way solenoid valve (103) are connected to form a circuit; the first three-position four-way solenoid valve (106) and The oil inlet port of the second three-position four-way solenoid valve (107) is respectively connected to the oil outlet port of the pressure reducing valve (105); the two working ports of the first three-position four-way solenoid valve (106) are connected to the The first two-way hydraulically controlled one-way valve (109), the first two-way hydraulically controlled one-way valve (109) is respectively connected to the X-axis hydraulic pump ( 17), the first oil inlet and outlet and the second oil inlet and outlet, the first accumulator (116) is connected to the first oil inlet and outlet of the X-axis hydraulic pump (17), the first pressure switch (115 ) is connected to the first accumulator (116); the two working ports of the second three-position four-way solenoid valve (107) are connected to the second two-way hydraulic control check valve (110), and the second The two-way hydraulically controlled one-way valve (110) is respectively connected to the first oil inlet and outlet port and the second oil inlet and outlet port of the Y-axis hydraulic pump (19) through the two second one-way throttle valves (113). The second accumulator (119) is connected to the first oil inlet and outlet port of the Y-axis hydraulic pump (19), the second pressure switch (120) is connected to the second accumulator (119); the third The two working ports of the three-position four-way solenoid valve (108) are connected to the third two-way hydraulic control check valve (111), and the third two-way hydraulic control check valve (111) passes through the two third check valves. The first oil inlet and outlet port and the second oil inlet and outlet port of the Z-axis hydraulic pump (18) are respectively connected to the throttle valve (114). 2. The hydraulic control system of the microwave-heated asphalt pavement in-situ thermal regeneration device according to claim 1, wherein the vertical lifting mechanism includes a mounting seat fixed on the side of the slider of the second guide rail, and the mounting seat A vertical through hole is opened on the top, and a thrust bearing is arranged in the vertical through hole; the Z-axis hydraulic pump (18) is vertically arranged, its piston rod passes through the thrust bearing, and the end of the cylinder body is in contact with the thrust bearing. The flat base ring of the bearing is in contact with the piston rod clamping structure at the bottom of the mounting seat; a collar (24) is installed at the lower end of the piston rod, and the collar (24) is fixed on the On the piston rod, the side of the collar (24) is vertically fixedly connected to the L-shaped connecting plate (7), and the bottom end of the L-shaped connecting plate (7) is connected to the heating device. 3. The hydraulic control system of the in-situ heat regeneration device for microwave heating asphalt pavement according to claim 1, characterized in that: the third guide rail slider (20) and the fourth guide rail slider (14) are provided with a limit structure . 4. The hydraulic control system of the microwave-heated asphalt pavement thermal in-situ regeneration device according to claim 2, characterized in that it also includes a fixed bracket (25), and the fixed bracket (25) includes a base and a collar fixedly connected to each other , the collar is sleeved on the cylinder body of the Z-axis hydraulic pump (18), and the base of the fixing bracket (25) is fixed on the installation seat. 5. The hydraulic control system of the microwave-heated asphalt pavement thermal in-situ regeneration device according to claim 2, characterized in that: the oil inlet of the plunger pump (102) is connected to a filter (101).

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