Asphalt foaming device

Abstract

The invention belongs to the technical field of asphalt preparation, and particularly relates to an asphalt foaming device which comprises a foaming pipe and further comprises a water supply pipe, the water supply pipe is fixedly inserted into the pipe wall of the foaming pipe and located at the feeding end of the foaming pipe, and a plurality of evenly-distributed small holes are formed in the pipe wall of the water supply pipe. A conical atomizing nozzle is fixedly mounted in each small hole; the static mixing unit is installed in the foaming pipe, and water and hot asphalt are mixed and circulated through the static mixing unit. The mixing uniformity of hot asphalt and water can be improved, the foaming quality is effectively improved, the structure is simple, asphalt materials can be premixed, the water spraying pressure is automatically regulated and controlled based on the viscosity value of the asphalt materials, the foaming effect under different viscosities is guaranteed, meanwhile, water liquid can be automatically heated according to the temperature before the asphalt and the water are mixed, and the foaming efficiency is improved. The temperature difference is kept in a proper range, and the stability of asphalt foaming quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of asphalt preparation, and in particular relates to an asphalt foaming device. Background Art

[0002] Traditional hot-mix asphalt has high energy consumption, high pollution, and is difficult to adapt to recycled materials. Asphalt foaming technology reduces the mixing temperature through the reaction of water and hot asphalt, achieves warm-mix energy saving, and improves the recycling rate, becoming the key to the green upgrade of road projects.

[0003] Currently, traditional asphalt foaming devices usually use single-point water injection, mechanical dynamic stirring or Venturi tube injection to mix water and high-temperature asphalt for foaming. However, the contact area of ​​single-point water injection is small, making it difficult to maintain stable asphalt foaming quality, while mechanical stirring has the risk of high-temperature seal failure, and the operating burden of the stirring mechanism is heavy, increasing electricity consumption. Venturi tubes are only suitable for low-viscosity matrix asphalt and cannot meet the needs of modified asphalt and recycled materials. Therefore, traditional asphalt foaming devices have defects such as insufficient mixing, low expansion rate, high energy consumption and easy wear of equipment, resulting in poor performance. Summary of the Invention

[0004] The purpose of the present invention is to provide an asphalt foaming device in view of the above problems.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: an asphalt foaming device, including a foaming tube, and further comprising:

[0006] A water supply pipe is fixedly plugged into the wall of the foaming pipe, and the water supply pipe is located at the feed end of the foaming pipe. The wall of the water supply pipe is provided with a plurality of evenly distributed small holes, and a conical atomizing nozzle is fixedly installed inside each small hole;

[0007] a static mixing unit installed inside the foaming tube, the static mixing unit circulating a mixture of water and hot asphalt;

[0008] A pre-mixing unit is installed at the feed end of the foaming tube, and is used to pre-mix the asphalt material;

[0009] A temperature control unit is installed inside the water supply pipe, and is used to adjust the temperature of the sprayed water.

[0010] Preferably, the static mixing unit includes a support rod arranged inside the foaming tube, and the support rod is coaxial with the foaming tube, the rod wall of the support rod is fixedly installed with a plurality of annularly evenly distributed support plates, and each support plate is fixedly connected to the inner wall of the foaming tube, and the plurality of support plates and the support rod are jointly fixedly installed with a plurality of spiral blades, and the side wall of each of the spiral blades is provided with a plurality of mixing micropores.

[0011] Preferably, the pre-mixing unit includes a fixed tube fixedly installed at the feed end of the foaming tube, a circular ring is provided inside the fixed tube, two groups of metal cross bars are fixedly provided inside the circular ring, and multiple metal longitudinal bars are fixedly provided between the multiple metal cross bars in the same group, the two groups of metal cross bars and the two groups of metal longitudinal bars are staggered with each other, a pressure detection mechanism is installed inside the fixed tube, and the circular ring is connected to the fixed tube through the pressure detection mechanism.

[0012] Preferably, the pressure detection mechanism includes a plurality of support slot blocks fixedly mounted on the inner wall of the fixed tube, and the slot wall of each support slot block is slidably connected to a detection rod, each of the detection rods is fixedly connected to the top of the ring, and a support spring is fixedly arranged between each detection rod and the slot wall of the support slot block on the same side, a mounting block is fixedly mounted on the top of each support slot block, and a pressure sensor is fixedly mounted on the bottom of each mounting block, the top of each detection rod is in contact with the pressure measuring end of the pressure sensor, a pressure control component is installed inside the water supply pipe, and the pressure control component regulates the pressure inside the water supply pipe according to the average electrical signal fed back by each pressure sensor.

[0013] Preferably, the pressure control assembly includes a blocking end plate fixed to the end of the water supply pipe by a flange, and the blocking end plate is arranged on the side of the water supply pipe close to the conical atomizing nozzle, and the side wall of the blocking end plate away from the water supply pipe is fixedly installed with a mounting cylinder, and the mounting cylinder is fixedly plugged into the wall of the foaming tube, and the side wall of the blocking end plate away from the mounting cylinder is fixedly installed with a pressurized tube, and the pressurized tube is arranged on the inner side of the water supply pipe and the inside of the pressurized tube is slidably connected with a pressurized piston, an electromagnetic push rod is fixedly inserted at the position of the blocking end plate located on the inner side of the mounting cylinder, and the movable end of the electromagnetic push rod is fixedly connected to the side wall of the pressurized piston, a microcontroller is fixedly installed on the inner wall of the mounting cylinder, and the microcontroller calculates the average value of the electrical signals fed back by each pressure sensor, and controls the current intensity passing into the electromagnetic push rod according to the calculated average value.

[0014] Preferably, a thermistor wire is inserted into the interior of each of the metal cross bars, and the outside of each thermistor wire is wrapped with an insulating sleeve. Each of the thermistor wires is fixedly connected to the inner wall of the metal cross bar through the insulating sleeve on the same side. The microcontroller controls the operation of the temperature control unit according to the strength of the electrical signal flowing through the series circuit of each thermistor wire.

[0015] Preferably, the temperature control unit includes a heating tube fixedly installed at the water inlet end of the water supply pipe, a mesh cage electric heater fixedly installed inside the heating tube, the microcontroller controls the operation of the mesh cage electric heater according to the strength of the electrical signal flowing through the series circuit of each thermistor wire, and a water temperature detection component is installed at the water inlet end of the heating tube.

[0016] Preferably, the water temperature detection assembly comprises a mounting frame fixedly installed inside the water inlet end of the heating pipe, and the mounting frame is fixedly plugged with a temperature detection probe, and the microcontroller controls the operation of the mesh cage electric heater according to the difference between the electric signal strength fed back by the temperature detection probe and the electric signal strength of the heat-sensitive resistance wire series flow.

[0017] Compared with the prior art, the asphalt foaming device has the advantages that:

[0018] 1. By the cooperation of the foaming pipe, the water supply pipe, the conical atomizing nozzle and the static mixing unit, the water dispersion degree is improved, the water and asphalt contact area is increased, the heat transfer and gasification process are accelerated, the static mixing unit passes the asphalt and water through the shearing, shunting and rotating three mixing paths, so that the mixing uniformity of the hot asphalt and water is improved, the foaming quality is effectively improved, the structure is simple, and the use effect is good.

[0019] 2. By the cooperation of the pre-mixing unit, the asphalt material can be cut and differentiated before mixing with water, so that the asphalt material can be pre-mixed, and the pressure detection mechanism and the pressing assembly are arranged, the water pressure can be automatically controlled based on the viscosity value of the asphalt material, so that when the viscosity of the asphalt material is large, the water impact force is increased, the water is shot into the asphalt material, and the foaming effect is ensured.

[0020] 3. By the cooperation of the temperature control unit, the heat-sensitive resistance wire and the insulating sleeve, the water to be sprayed can be automatically heated based on the temperature before the asphalt and water are mixed, so that the temperature difference between the asphalt material and water is kept within a suitable range, and the stability of the asphalt foaming quality is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic view of an asphalt foaming device provided by the present application;

[0022] Figure 2 is a three-dimensional structural schematic view of a water supply pipe of an asphalt foaming device provided by the present application;

[0023] Figure 3 is a structural schematic view of a static mixing unit of an asphalt foaming device provided by the present application;

[0024] Figure 4 is a structural schematic view of the inside of a fixed pipe of an asphalt foaming device provided by the present application;

[0025] Figure 5 is a structural schematic view of the inside of a fixed pipe of an asphalt foaming device provided by the present application; Figure 4 is a structural enlarged view of part A of the asphalt foaming device;

[0026] Figure 6This is a schematic diagram of the internal structure of a metal crossbar of an asphalt foaming device provided by the present invention;

[0027] Figure 7 This is a schematic top view of the structure of a mesh cage electric heater of an asphalt foaming device provided by the present invention;

[0028] Figure 8 It is a structural schematic diagram of a pressure control component of an asphalt foaming device provided by the present invention.

[0029] In the figure: 1 foaming tube, 2 water supply pipe, 3 conical atomizing nozzle, 4 static mixing unit, 41 support rod, 42 support sheet, 43 spiral blade, 44 mixed flow micropore, 5 pre-mixing unit, 51 fixed tube, 52 ring, 53 metal cross bar, 54 metal longitudinal bar, 6 temperature control unit, 61 heating tube, 62 mesh cage electric heater, 7 pressure detection mechanism, 71 support slot block, 72 detection rod, 73 support spring, 74 mounting block, 75 pressure sensor, 8 pressure control assembly, 81 blocking end plate, 82 mounting cylinder, 83 pressurizing tube, 84 pressurizing piston, 85 electromagnetic push rod, 86 microcontroller, 9 thermistor wire, 10 insulating sleeve, 11 water temperature detection assembly, 111 mounting bracket, 112 temperature detection probe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] like Figures 1-8 As shown, an asphalt foaming device includes a foaming tube 1 and also includes: a water supply pipe 2, the water supply pipe 2 is fixedly inserted into the pipe wall of the foaming tube 1, and the water supply pipe 2 is at the feed end of the foaming tube 1, the pipe wall of the water supply pipe 2 is provided with a plurality of evenly distributed small holes, and a conical atomizing nozzle 3 is fixedly installed inside each small hole, a static mixing unit 4 is installed inside the foaming tube 1, the static mixing unit 4 enables the mixed circulation of water and hot asphalt, the static mixing unit 4 includes a support rod 41 arranged inside the foaming tube 1, and the support rod 41 is coaxial with the foaming tube 1, a plurality of annular evenly distributed support sheets 42 are fixedly installed on the rod wall of the support rod 41, and each support sheet 42 is fixedly connected to the inner wall of the foaming tube 1, a plurality of spiral blades 43 are fixedly installed on the support sheets 42 and the support rod 41, and a plurality of mixed flow micropores 44 are provided on the side wall of each spiral blade 43, and the spiral blades 43 can be customized in different quantities and pitches according to different asphalt foaming needs.

[0032] The premixing unit 5 is installed at the feed end of the foaming tube 1. The premixing unit 5 is used to premix the asphalt material. The premixing unit 5 includes a fixed tube 51 fixedly installed at the feed end of the foaming tube 1. A circular ring 52 is provided inside the fixed tube 51. Two groups of metal cross bars 53 are fixedly provided inside the circular ring 52, and multiple metal longitudinal bars 54 are fixedly provided between the multiple metal cross bars 53 in the same group. The two groups of metal cross bars 53 and the two groups of metal longitudinal bars 54 are staggered with each other. A pressure detection mechanism 7 is installed inside the fixed tube 51, and the circular ring 52 is connected to the fixed tube 51 through the pressure detection mechanism 7. The staggered arrangement of the metal cross bars 53 and the metal longitudinal bars 54 can facilitate the diversion and mixing of the hot asphalt material.

[0033] The pressure detection mechanism 7 includes a plurality of support slot blocks 71 fixedly mounted on the inner tube wall of the fixed tube 51, and the slot wall of each support slot block 71 is slidably connected with a detection rod 72, each detection rod 72 is fixedly connected to the top of the ring 52, and a support spring 73 is fixedly arranged between each detection rod 72 and the slot wall of the support slot block 71 on the same side, a mounting block 74 is fixedly mounted on the top of each support slot block 71, and a pressure sensor 75 is fixedly mounted on the bottom of each mounting block 74, and the top of each detection rod 72 is in contact with the pressure measuring end of the pressure sensor 75. A pressure control component 8 is installed inside the water supply pipe 2, and the pressure control component 8 regulates the pressure inside the water supply pipe 2 according to the average electrical signal fed back by each pressure sensor 75. Each pressure sensor 75 can convert the pressure into an electrical signal and feed it back to the microcontroller 86, wherein a stainless steel hose is sleeved on the outside of the detection rod 72, and the hose is fixed between the support slot block 71 and the ring 52.

[0034] The pressure control component 8 includes a sealing end plate 81 fixed to the end of the water supply pipe 2 through a flange, and the sealing end plate 81 is arranged on the side of the water supply pipe 2 close to the conical atomizing nozzle 3, and the side wall of the sealing end plate 81 away from the water supply pipe 2 is fixedly installed with a mounting cylinder 82, and the mounting cylinder 82 is fixedly plugged with the pipe wall of the foaming tube 1, and the side wall of the sealing end plate 81 away from the mounting cylinder 82 is fixedly installed with a pressurized pipe 83, and the pressurized pipe 83 is arranged on the inner side of the water supply pipe 2 and the inner part of the pressurized pipe 83 is slidably connected with a pressurized piston 84, and the sealing end plate 81 is located at a position inside the mounting cylinder 82. An electromagnetic push rod 85 is fixedly installed, and the movable end of the electromagnetic push rod 85 is fixedly connected to the side wall of the pressurizing piston 84. A microcontroller 86 is fixedly installed on the inner wall of the mounting cylinder 82. The microcontroller 86 calculates the average value of the electrical signals fed back by each pressure sensor 75, and controls the current intensity entering the electromagnetic push rod 85 according to the calculated average value. The conical atomizing nozzle 3 uses the high-speed jet generated by the aperture contraction and the guiding effect of the conical structure to force the water flow to be divided and collided, and cooperates with ultrasonic assisted atomization to finally break the water droplets into droplets with a diameter of less than 50μm.

[0035] The water temperature detection component 11 includes a mounting bracket 111 fixedly installed inside the water inlet end of the heating pipe 61, and the mounting bracket 111 is fixedly plugged with a temperature detection probe 112, and the microcontroller 86 controls the operation of the mesh cage electric heater 62 according to the difference between the strength of the electrical signal fed back by the temperature detection probe 112 and the strength of the electrical signal flowing through the thermistor wire 9 in series. The temperature detection probe 112 can convert the temperature into an electrical signal and feed it back to the microcontroller 86.

[0036] The temperature control unit 6 is installed inside the water supply pipe 2. The temperature control unit 6 is used to adjust the temperature of the sprayed water. The inside of each metal cross bar 53 is interspersed with a thermistor wire 9, and the outside of each thermistor wire 9 is wrapped with an insulating sleeve 10. Each thermistor wire 9 is fixedly connected to the inner wall of the metal cross bar 53 through the insulating sleeve 10 on the same side. The microcontroller 86 controls the operation of the temperature control unit 6 according to the strength of the electrical signal flowing through the series circuit of each thermistor wire 9. The temperature control unit 6 includes a heating tube 61 fixedly installed at the water inlet end of the water supply pipe 2. A mesh cage heater 62 is fixedly installed inside the heating tube 61. The microcontroller 86 controls the operation of the mesh cage heater 62 according to the strength of the electrical signal flowing through the series circuit of each thermistor wire 9. A water temperature detection component 11 is installed at the water inlet end of the heating tube 61. The mesh cage heater 62 is 20 cm long and is a cylindrical mesh woven from multiple heatable metals.

[0037] The operating principle of the present invention is now explained as follows: when the asphalt is foamed, the hot asphalt enters the foaming tube 1 through the fixed tube 51. When the hot asphalt passes through the fixed tube 51, it flows through the grids between the metal cross bars 53 and the metal longitudinal bars 54. Since the metal cross bars 53 and the longitudinal bars on the upper and lower sides are staggered, the hot asphalt is forced to be diverted (i.e., the hot asphalt is diverted through the staggered grids). Therefore, the hot asphalt can be pre-diverted and mixed before it comes into contact with water. Since asphalt may collide with and be squeezed between pipes during transportation, resulting in uneven distribution, pre-mixing the hot asphalt can improve the uniformity of the hot asphalt before it comes into contact with water.

[0038] The hot asphalt that enters the foaming tube 1 through the fixed tube 51 will pass through the water supply pipe 2. During foaming, the external pump will spray the water through the heating tube 61 and the water supply pipe 2 from each conical atomizing nozzle 3. The conical atomizing nozzle 3 uses the high-speed jet generated by the aperture contraction and the diversion effect of the conical structure to force the water flow to be divided and collided. Combined with ultrasonic assisted atomization, the water droplets are finally broken into droplets with a diameter of less than 50μm. They are sprayed into the asphalt phase in a multi-directional cone, increasing the contact area between water and hot asphalt and accelerating the heat transfer and vaporization process.

[0039] After contacting with water, the hot asphalt contacts each spiral blade 43. Under the action of flow pressure, the hot asphalt is forced to flow along the spiral blades 43. With the action of the mixing micropores 44 on the side walls of the spiral blades 43, the mixture of hot asphalt and water undergoes three mixing paths of shearing, diversion and rotation, thereby improving the mixing uniformity of the hot asphalt and water and effectively improving the foaming quality. Among them, the number and spacing of the spiral blades 43 of the static mixing unit 4 can be customized according to use. There are two ratios of the pitch to the axis length of the spiral blades 43, one is 4:1, which is suitable for asphalt foaming requiring high shear force, and the other is 2:1, which is suitable for asphalt foaming requiring high diversion. It can be selected according to actual conditions. Secondly, a plurality of static mixing units 4 can be provided. For example, the number of static mixing units 4 is set to 6, and the 6 static mixing units 4 are arranged alternately (that is, the spiral blades 43 of adjacent static mixing units 4 rotate in opposite directions), thereby generating reverse vortexes and improving mixing uniformity.

[0040] Among them, when the hot asphalt passes through the inside of the ring 52, due to the possible difference in local viscosity of the hot asphalt, when the hot asphalt with different viscosities flows through the metal cross bar 53 and the metal vertical bar 54, the hot asphalt with different viscosities has different flow resistance to the metal cross bar 53 and the metal vertical bar 54. When the hot asphalt with high viscosity passes through the metal cross bar 53 and the metal vertical bar 54, the flow resistance becomes larger, and at this time the pressure applied by the ring 52 to the pressure sensor 75 through the detection rod 72 increases. Each pressure sensor 75 converts the pressure into an electrical signal and feeds it back to the microcontroller 86. The microcontroller The microcontroller 86 calculates the average value of the feedback electrical signals from each pressure sensor 75. When the electrical signal increases, the microcontroller 86 controls the current intensity flowing into the electromagnetic push rod 85 to increase synchronously. At this time, the electromagnetic push rod 85 pushes the extrusion piston to move a greater distance into the water supply pipe 2, thereby reducing the space inside the water supply pipe 2. Under the action of the water inlet pressure, the flow rate of the water sprayed from each conical atomizing nozzle 3 increases, which can facilitate the injection of the water into the hot asphalt, promote sufficient contact between the water and the hot asphalt, and ensure that the hot asphalt with a relatively high viscosity can also have a good mixing effect with water.

[0041] Secondly, when the hot asphalt flows through the metal cross bar 53, its heat will be transferred to the thermistor wire 9 through the metal cross bar 53 and the insulating sleeve 10. When the temperature of the hot asphalt is low, for example, less than 140°C, its ability to vaporize water decreases. At this time, due to the temperature drop, the resistance of the thermistor wire 9 will increase synchronously. Therefore, the microcontroller 86 detects that the strength of the electrical signal flowing through the series circuit of each thermistor wire 9 becomes smaller. At this time, the microcontroller 86 controls the mesh cage electric heater 62 to start working, and controls the heating temperature of the mesh cage electric heater 62 based on the strength of the electrical signal flowing through the series circuit of the thermistor wire 9. The mesh cage electric heater 62 can appropriately heat the water to be sprayed, thereby ensuring that the water can be quickly vaporized by reducing the temperature difference between the water and the hot asphalt, thereby improving the stability of the foaming quality.

[0042] At the same time, the temperature detection probe 112 inside the heating tube 61 will calculate the temperature of the incoming water and convert the temperature into an electrical signal to feed back to the microcontroller 86. The microcontroller 86 will calculate the difference between the electrical signal strength of the thermistor wire 9 series circuit and the electrical signal strength fed back by the temperature detection probe 112 to control the operation of the mesh cage electric heater 62. For example, when the hot asphalt temperature is low, the temperature detection probe 112 detects that the temperature of the incoming water is high (because the water is conventional water, it may have temperature fluctuations), so that the electrical signal corresponding to the hot asphalt temperature is the same as the electrical signal corresponding to the water temperature. When the difference in the electrical signal is kept within a threshold range (the threshold is set based on the temperature difference between the different asphalts and the water when foaming), the mesh cage electric heater 62 does not need to work, which is beneficial to improving the stability of the temperature difference between the hot asphalt and the water (wherein, since the hot asphalt needs a certain flow time when entering the water supply pipe 2 through the fixed pipe 51, the position adjustment of the pressurizing piston 84 and the heating of the water by the mesh cage electric heater 62 both require a certain time, so that the pressurized water spraying control of the hot asphalt and the temperature control of the water can be matched with the position of the flowing hot asphalt).

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An asphalt foaming device, comprising a foaming tube (1), characterized in that: Also includes: A water supply pipe (2) is fixedly plugged into the wall of the foaming pipe (1), and the water supply pipe (2) is located at the feed end of the foaming pipe (1). The wall of the water supply pipe (2) is provided with a plurality of evenly distributed small holes, and a conical atomizing nozzle (3) is fixedly installed inside each small hole. a static mixing unit (4) installed inside the foaming tube (1), the static mixing unit (4) allowing a mixture of water and hot asphalt to circulate; A premixing unit (5) is installed at the feed end of the foaming tube (1), and the premixing unit (5) is used to premix the asphalt material; A temperature control unit (6) is installed inside the water supply pipe (2), and the temperature control unit (6) is used to adjust the temperature of the sprayed water.

2. The asphalt foaming device according to claim 1, characterized in that: The static mixing unit (4) comprises a support rod (41) arranged inside the foaming tube (1), and the support rod (41) is coaxial with the foaming tube (1); a plurality of annularly evenly distributed support sheets (42) are fixedly mounted on the rod wall of the support rod (41), and each support sheet (42) is fixedly connected to the inner wall of the foaming tube (1); a plurality of spiral blades (43) are fixedly mounted on the plurality of support sheets (42) and the support rod (41); and a plurality of mixing micropores (44) are provided on the side wall of each spiral blade (43).

3. The asphalt foaming device according to claim 1, characterized in that: The pre-mixing unit (5) comprises a fixed tube (51) fixedly mounted on the feed end of the foaming tube (1); a circular ring (52) is arranged inside the fixed tube (51); two groups of metal cross bars (53) are fixedly arranged inside the circular ring (52); and a plurality of metal longitudinal bars (54) are fixedly arranged between the plurality of metal cross bars (53) in the same group; the two groups of metal cross bars (53) and the two groups of metal longitudinal bars (54) are staggered with each other; a pressure detection mechanism (7) is installed inside the fixed tube (51), and the circular ring (52) is connected to the fixed tube (51) via the pressure detection mechanism (7).

4. The asphalt foaming device according to claim 3, characterized in that: The pressure detection mechanism (7) comprises a plurality of support slot blocks (71) fixedly mounted on the inner wall of the fixed tube (51), and the slot wall of each support slot block (71) is slidably connected to a detection rod (72), each detection rod (72) is fixedly connected to the top of the ring (52), and a support spring (73) is fixedly arranged between each detection rod (72) and the slot wall of the support slot block (71) on the same side, a mounting block (74) is fixedly mounted on the top of each support slot block (71), and a pressure sensor (75) is fixedly mounted on the bottom of each mounting block (74), and the top of each detection rod (72) contacts the pressure measuring end of the pressure sensor (75), and a pressure control component (8) is installed inside the water supply pipe (2), and the pressure control component (8) regulates the pressure inside the water supply pipe (2) according to the average electrical signal fed back by each pressure sensor (75).

5. The asphalt foaming device according to claim 4, characterized in that: The pressure control assembly (8) comprises a blocking end plate (81) fixed to the end of the water supply pipe (2) via a flange, and the blocking end plate (81) is arranged on a side of the water supply pipe (2) close to the conical atomizing nozzle (3), a mounting cylinder (82) is fixedly installed on the side wall of the blocking end plate (81) away from the water supply pipe (2), and the mounting cylinder (82) is fixedly plugged into the pipe wall of the foaming pipe (1), and a pressurizing pipe (83) is fixedly installed on the side wall of the blocking end plate (81) away from the mounting cylinder (82), and the pressurizing pipe (83) is arranged on the side wall of the water supply pipe (2). A pressurizing piston (84) is slidably connected to the inner side of the pressurizing tube (83), and an electromagnetic push rod (85) is fixedly installed at a position inside the sealing end plate (81) located inside the mounting cylinder (82), and the movable end of the electromagnetic push rod (85) is fixedly connected to the side wall of the pressurizing piston (84). A microcontroller (86) is fixedly installed on the inner wall of the mounting cylinder (82), and the microcontroller (86) calculates the average value of the electrical signals fed back by each pressure sensor (75), and controls the current intensity passed into the electromagnetic push rod (85) according to the calculated average value.

6. The asphalt foaming device according to claim 5, characterized in that: The interior of each of the metal cross bars (53) is penetrated by a thermistor wire (9), and the outer side of each thermistor wire (9) is wrapped with an insulating sleeve (10). Each of the thermistor wires (9) is fixedly connected to the inner wall of the metal cross bar (53) through the insulating sleeve (10) on the same side. The microcontroller (86) controls the operation of the temperature control unit (6) according to the strength of the electrical signal flowing through the series circuit of each thermistor wire (9).

7. The asphalt foaming device according to claim 6, characterized in that: The temperature control unit (6) comprises a heating pipe (61) fixedly mounted on the water inlet end of the water supply pipe (2); a mesh cage electric heater (62) is fixedly mounted inside the heating pipe (61); the microcontroller (86) controls the operation of the mesh cage electric heater (62) according to the strength of the electric signal flowing through the series circuit of each thermistor wire (9); and a water temperature detection component (11) is mounted on the water inlet end of the heating pipe (61).

8. The asphalt foaming device according to claim 7, characterized in that: The water temperature detection assembly (11) includes a mounting frame (111) fixedly mounted inside the water inlet end of the heating pipe (61), and a temperature detection probe (112) is fixedly plugged into the mounting frame (111), and the microcontroller (86) controls the operation of the mesh cage electric heater (62) according to the difference between the strength of the electric signal fed back by the temperature detection probe (112) and the strength of the electric signal flowing through the series-connected thermistor wire (9).

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