CN104074119B - Butt up against stone surface modification atomising device and the control method thereof in asphalt mixing building - Google Patents

Abstract

The invention discloses a stone surface modification atomization device connected to an asphalt mixing plant and a control method thereof. The device includes a control unit, a raw material barrel, a delivery pump, a first electronic switch, a second electronic switch, a first fog atomizing nozzle device and the second atomizing nozzle device; the delivery pump communicates with the first atomizing nozzle device and the second atomizing nozzle device respectively through the first pipeline and the second pipeline; the first pipeline and the second pipeline are respectively provided with the first An electric valve and a second electric valve; the first atomizing nozzle device is arranged on the upper part of the screening bin; the second atomizing nozzle device is arranged on the mixing tank; the delivery pump and the first electric valve are connected to the power supply through the first electronic switch; The delivery pump and the second electric valve are connected to the power supply through the second electronic switch; the first electronic switch and the second electronic switch are respectively connected to the control unit. The invention carries out surface modification twice on the stone material, which can achieve a larger specific surface area, so that the surface modifier of the stone material is fully and evenly distributed on the surface of the stone material.

Description

Stone Surface Modification Atomization Device Connected to Asphalt Mixing Plant and Its Control Method

technical field

The invention relates to a stone surface modification device connected to an asphalt mixing plant, in particular to a stone surface modification atomization device connected to an asphalt mixing plant and a control method thereof.

Background technique

Stone is an important raw material for the construction of asphalt concrete roads, but high-quality stone that fully meets the performance requirements is very scarce. For this reason, a method for modifying the surface of the stone is proposed, and the performance that the stone lacks is modified to improve its defects. . Such as granite and other acidic stones are dense and hard, with strong wear resistance, which can fully exert the intercalation effect between stones and meet the requirements of wear resistance and bearing capacity of the surface layer of asphalt pavement. However, due to the weak interface adhesion with asphalt, There are often limitations in the application of the surface layer of asphalt pavement, especially when the asphalt film falls off under the action of water and early damage such as potholes and looseness occurs. However, in engineering applications in some areas, alkaline and neutral high-quality stone materials such as basalt and diabase that can meet the requirements of pavement are on the verge of scarcity and have become extremely scarce resources. Therefore, acidic stone materials with abundant reserves and low prices are adopted For example, the surface modification method of granite has great technical application prospects as a high-grade highway asphalt surface layer stone.

When modifying the stone surface, in order to improve the efficiency and uniformity of the stone surface modification, and to reduce the cost of raw materials, it is necessary to atomize and foam the liquid stone surface modifier to achieve Larger specific surface area. At present, the stone surface modifier is still in the new product stage, and there is a lack of suitable devices and control methods in the market. Therefore, how to treat the stone surface modifier so that it can be used effectively is a very critical technology.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a stone surface modification atomization device that is connected to the asphalt mixing plant. The device can be connected to the asphalt mixing plant and can be screened in the asphalt mixing plant. The surface modification of the stone is carried out twice in the bin and the mixing tank, so that the surface modifier of the stone is fully and evenly distributed on the surface of the stone, thereby improving various properties of the stone.

Another object of the present invention is to provide a control method for a stone surface modification atomization device connected to an asphalt mixing plant.

The first object of the present invention is achieved through the following technical solutions: the stone surface modification atomization device connected to the asphalt mixing plant, including a control unit, a raw material bucket for placing stone surface modifiers, a delivery pump, and a first electronic switch , the second electronic switch, the first atomizing nozzle device and the second atomizing nozzle device;

One end of the delivery pump communicates with the raw material barrel; the other end of the delivery pump communicates with the first atomizing nozzle device through the first pipeline, and the other end of the delivery pump communicates with the second atomizing nozzle device through the second pipeline connected; the first pipeline is provided with a first electric valve, and the second pipeline is provided with a second electric valve;

The first atomizing nozzle device is set on the upper part of the screening bin of the asphalt mixing plant; the second atomizing nozzle device is set on the mixing tank of the asphalt mixing plant;

The delivery pump and the first electric valve are connected to the power supply through the first electronic switch; the delivery pump and the second electric valve are connected to the power supply through the second electronic switch; the first electronic switch and the second electronic switch are respectively connected to the control The units are connected, and the working states of the first electronic switch and the second electronic switch are controlled by the control unit.

Preferably, the first atomizing nozzle device and the second atomizing nozzle device both include a plurality of multi-directional atomizing nozzles, wherein the atomizing nozzles in each direction in the first atomizing nozzle device are all facing the screening chamber, The atomizing nozzles in all directions in the second atomizing nozzle device are all facing the inside of the mixing tank.

Furthermore, each atomizing nozzle in the second atomizing nozzle device is evenly embedded in the cover plate, and the cover plate is attached to the inner wall of the mixing tank of the asphalt mixing plant.

Preferably, the first pipeline is provided with a first electronic flowmeter connected to the control unit, and the second pipeline is provided with a second electronic flowmeter connected with the control unit.

Preferably, the atomizing device further includes a third electronic switch connected to the control unit; wherein the delivery pump, the first electric valve, the second electric valve and the third electronic switch are all connected in series.

Furthermore, the control unit is mainly composed of a control box and the overall control system of the asphalt mixing plant, the first electronic switch, the second electronic switch and the third electronic switch are all arranged in the control box; and the first electronic The switch, the second electronic switch and the third electronic switch are all connected with the general control system of the asphalt mixing plant in the control unit; the general control system of the asphalt mixing plant is also connected with an alarm device.

The second object of the present invention is achieved through the following technical solutions: a method for controlling the atomization device for modifying the stone surface connected to the asphalt mixing plant, comprising the following steps:

S1. The control unit controls the first electronic switch to be closed, the delivery pump and the first electric valve are opened, the delivery pump extracts the stone surface modifier from the raw material barrel, and the stone surface modifier is transported to the first atomizing nozzle device through the first pipeline At the same time, the stone material enters the screening chamber of the asphalt mixing building, and the first atomizing nozzle device sprays the stone material in the screening chamber to modify the surface of the stone material for the first time, and completes the first modification of the stone material surface. sex;

S2. After the delivery pump and the first electric valve run for a time t1, the control unit controls the first electronic switch to be disconnected, the delivery pump and the first electric valve are closed, and the first atomizing nozzle device stops spraying;

S3. After the first atomizing nozzle device stops spraying, start the mixing motor of the asphalt mixing plant, then the control unit controls the second electronic switch to close, the input pump and the second electric valve start, and the delivery pump extracts the surface of the stone from the raw material barrel Modifier, the stone surface modifier is transported to the second atomizing nozzle device through the second pipeline, and the second atomizing nozzle device sprays against the mixing tank. After the second atomizing nozzle device sprays for t2, the asphalt mixing The building will pour the stone material that has been screened by the screening chamber and completed the first surface modification in step S1 into the mixing tank. modified;

S4. After the delivery pump and the second electric valve have been running for t3, the control unit controls the second electronic switch to be disconnected, the delivery pump and the second electric valve are closed, the second atomizing nozzle device stops spraying, and the second spraying on the stone surface is completed. secondary modification.

Preferably, in the step S1, the first electronic flowmeter arranged in the first pipeline detects the amount of the stone surface modifier sprayed into the screening bin by the first atomizing nozzle device; in the step S3 Among them, the second electronic flow meter arranged in the second pipeline detects the amount of the stone surface modifier sprayed into the mixing tank by the second atomizing nozzle device.

Furthermore, when the first electronic flowmeter in the step S1 detects that the injection amount of the stone surface modifier of the first atomizing nozzle device is less than or exceeds the preset flow rate, or when the second electronic flowmeter detects When the amount of stone surface modifier sprayed by the second atomizing nozzle device is less than or exceeds the preset flow rate, the alarm device connected to the control unit will alarm, and at the same time, the control unit will control the third electronic switch to be disconnected, and the delivery pump and the first electric valve will be disconnected. Both the electric valve and the second electric valve are powered off and closed.

Preferably, it is characterized in that the control unit sets the times t1, t2 and t3 according to the amount of stone used.

Compared with the prior art, the present invention has the following advantages and effects:

(1) The stone surface modification atomization device of the present invention is docked with the asphalt mixing plant, through the first atomizing nozzle device arranged on the upper part of the screening bin of the asphalt mixing plant and the second atomizing nozzle device arranged on the mixing tank of the asphalt mixing plant The atomizing nozzle device performs two surface modifications on the stone entering the asphalt mixing plant, which can achieve a larger specific surface area, so that the surface modifier of the stone is fully and evenly distributed on the surface of the stone, and various performance indicators of the stone are improved.

(2) The present invention detects the spray amount of the first atomizing nozzle device and the second atomizing nozzle device by the first electronic flowmeter and the second electronic flowmeter, so that the control unit can grasp the first surface modification and the first surface modification of the stone in real time. Stone surface modifier used in the second surface modification. When the first electronic flowmeter or the second electronic flowmeter detects that the injection amount of the stone surface modifier is less than or exceeds the preset flow rate or an emergency occurs, the alarm device will give an alarm, and the control unit will control the third electronic switch to be disconnected, At this time, the delivery pump, the first electric valve and the second electric valve are all powered off and closed, and the entire atomization device stops working, thereby avoiding some failures affecting the use of the device of the present invention.

(3) The first atomizing nozzle device and the second atomizing nozzle device in the present invention all include a plurality of nozzles with multiple directions, and more uniform spraying on the stone surface can be realized by a plurality of multidirectional spray nozzles, making the surface of the stone more uniform. The modifier can quickly and evenly cover the stone surface after forming micron-sized droplets.

Description of drawings

Fig. 1 is a schematic structural view of the atomization device of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example

As shown in Figure 1, this embodiment discloses a stone surface modification atomization device connected to an asphalt mixing plant, including a control unit, a raw material barrel 2 for placing a stone surface modifier, a delivery pump 1, a first An electronic switch 23, a second electronic switch 24, a third electronic switch 25, the first atomizing nozzle device 8 and the second atomizing nozzle device 13; one end of the delivery pump 1 communicates with the raw material barrel 2; the other of the delivery pump 1 One end is communicated with the first atomizing nozzle device 8 through the first pipeline 51, and the other end of the delivery pump 1 is also communicated with the second atomizing nozzle device 13 through the second pipeline 52; the first pipeline is provided with the first electric valve 6, the second The second pipeline is provided with a second electric valve 3;

The delivery pump 1 and the first electric valve 6 are connected to the power supply through the first electronic switch 23; the delivery pump 1 and the second electric valve 3 are connected to the power supply through the second electronic switch 24; in this embodiment, the delivery pump, the first electric valve 6 and the first electronic switch 23 are connected in series to the power supply; the transfer pump 1, the second electric valve 3 and the second electronic switch 24 are connected in series to the power supply, and the third electronic switch 25 is connected to the transfer pump 1, the first electric valve 6 and the second The electric valves 3 are all connected in series; the first electric valve 6 and the first electronic switch 23 are connected in parallel with the second electric valve 3 and the second electronic switch 24 . The first electronic switch 23, the second electronic switch 24 and the third electronic switch 25 are respectively connected with the control unit, and the operating states of the first electronic switch 23, the second electronic switch 24 and the third electronic switch 25 are controlled by the control unit, and the third electronic switch The electronic switch 25 is arranged between the delivery pump 1 and the power supply, wherein under normal working conditions, the third electronic switch 25 is always in a closed state. When the control unit controls the first electronic switch to be closed, the delivery pump and the first electric valve are powered on; when the control unit controls the second electronic switch to be closed, the delivery pump and the second electric valve are powered on; when the control unit controls the third When the electronic switch is turned off, the delivery pump, the first electric valve and the second electric valve are all powered off.

Wherein the stone surface modifier in the raw material barrel 2 of this embodiment can enter the first atomizing nozzle device 8 through the first pipeline 51, and can also enter the second atomizing nozzle device 13 through the second pipeline 52; Both the atomizing nozzle device 8 and the second atomizing nozzle device 13 include a plurality of atomizing nozzles in multiple directions; wherein the first atomizing nozzle device 8 is arranged on the upper part of the screening bin 10 of the asphalt mixing plant, and the first atomizing nozzle device Each atomizing nozzle of 8 sprays the stone material surface modifier into the screening bin 10 of the asphalt mixing plant. Each atomizing nozzle in the second atomizing nozzle device 13 is evenly embedded in the cover plate 14, and the cover plate 14 is attached to the inner wall of the mixing tank 15 of the asphalt mixing plant. The nozzles are all facing the screening bin 10, and the atomizing nozzles in all directions in the second atomizing nozzle device 13 are all facing the inside of the mixing tank 15, so that the stone surface modifier can be sprayed into the screening bin and the inside of the mixing tank 15. Wherein the position of the cover plate 14 is at the position where the inner wall of the mixing tank 15 is closer to the cylinder mouth, that is, it is arranged on the upper half of the inner wall. Of course, each atomizing nozzle of the second atomizing nozzle device in this embodiment can also be arranged at other positions of the mixing tank, such as being installed on the edge of the cylinder mouth of the mixing tank, as long as the installation of each atomizing nozzle does not affect the stone material entering the mixing tank can

The control unit of this embodiment is mainly composed of a control box 19 and a general control system 20 of the asphalt mixing plant, and the general control system 20 of the asphalt mixing plant has a man-machine interface 21 . Wherein the first electronic switch 23, the second electronic switch 24 and the third electronic switch 25 are all arranged in the control box 19, and are connected with the general control system signal 19 of the asphalt mixing plant; 25 is always closed. In this embodiment, when it is necessary to modify the surface of the stone in the screening bin 10 of the asphalt mixing plant, the overall control system 20 of the asphalt mixing plant activates the first electronic switch 23 in the control box, so that the delivery pump 1 and the second An electric valve 6 is powered on, and the delivery pump 1 extracts the stone surface modifier from the raw material barrel, and transports it to the first atomizing nozzle device 8 through the first pipeline 51, and sends it to the asphalt mixing device 8 through the first atomizing nozzle device 8. The aggregate surface modifier is sprayed into the screening bin 10 of the combined building. When it is necessary to modify the surface of the stone in the mixing tank 15 of the asphalt mixing plant, the overall control system 20 of the asphalt mixing plant starts the second electronic switch 24 in the control box 17, so that the delivery pump 1 and the second electric valve 3 Start, the delivery pump 1 extracts the stone surface modifier from the raw material barrel, and transports it to the second atomizing nozzle device 13 through the second pipeline 52, and sends it to the mixing tank 15 of the asphalt mixing plant through the second atomizing nozzle device 13 Spray stone surface modifier. The device in this embodiment first sprays the stone surface modifier into the stone in the screening bin 10 of the asphalt mixing plant through the first atomizing nozzle device 8, and then performs surface modification on the stone for the first time, and then passes through the second atomizing nozzle device 8 The device 13 sprays the stone surface modifier into the stone in the mixing tank 15 of the asphalt mixing plant to carry out the second surface modification on the stone.

In this embodiment, the first pipeline 51 is provided with the first electronic flowmeter 7 connected to the total control system 20 of the asphalt mixing plant in the control unit, and the first atomizing nozzle device 8 is sprayed into the air by the first electronic flowmeter 7. The amount in the screening bin 10 of the asphalt mixing plant; the second pipeline 52 in this embodiment is provided with a second electronic flowmeter 4 connected to the control unit of the overall control system 20 of the asphalt mixing plant, through which the second electronic flowmeter 4 Detect the amount of the second atomizing nozzle device 13 sprayed into the mixing tank 15 of the asphalt mixing plant; thereby accurately control the amount of the stone surface modifier through the first electronic flow meter 7 and the second electronic flow meter 4 . At the same time, the flow parameters detected by the first electronic flowmeter 7 and the second electronic flowmeter 4 can be displayed through the man-machine interface of the overall control system 20 of the asphalt mixing plant.

In addition, an alarm device is also connected to the control unit of this embodiment. When the first electronic flowmeter detects that the amount sprayed into the screening bin of the asphalt mixing plant by the first atomizing nozzle device is less than or exceeds the preset flow rate , or when the second electronic flowmeter detects that the amount sprayed into the mixing tank of the asphalt mixing plant by the second atomizing nozzle device is less than or exceeds the preset flow rate, the alarm device will alarm, and the control unit will control the third electronic switch 25 Disconnecting, so that the delivery pump, the first electric valve and the second electric valve are all de-energized, thereby stopping the delivery of materials to the first atomizing nozzle device or the second atomizing nozzle device.

This embodiment also discloses a control method for a stone surface modification atomization device connected to an asphalt mixing plant, including the following steps:

S1. Set the closing time of the first electronic switch 23 through the timer in the general control system of the asphalt mixing plant, so that the working time after the delivery pump and the first electric valve are opened is 5 seconds; the control unit controls the first electronic switch Closed, the delivery pump and the first electric valve are opened, the delivery pump extracts the stone surface modifier from the raw material barrel, and the stone surface modifier is transported to the first atomizing nozzle device through the first pipeline; at the same time, 3 tons of stone enters the asphalt mixing In the screening chamber of the building, the first atomizing nozzle device sprays the stone in the screening chamber to modify the surface of the stone for the first time; at the same time, the first electronic flowmeter in the first pipeline detects the first The amount of the stone surface modifier sprayed into the screening bin by the atomizing nozzle device 8; accurately controlling 1 kg of the stone surface modifier to be sprayed into the screening bin 10 through the first electronic flowmeter 7;

S2. After the delivery pump 1 and the first electric valve 6 have been running for 5 seconds, the control unit controls the first electronic switch 23 to be disconnected, the delivery pump 1 and the first electric valve 6 are closed, and the first atomizing nozzle device 8 stops spraying;

S3. After the first atomization spraying device stops spraying, the general control system of the asphalt mixing plant opens the top door 9 of the hot aggregate bin of the asphalt mixing plant, so that the aggregates that have been screened and have undergone a surface modification Enter the A, B, C, and D warehouses of the hot aggregate warehouse 11 of the asphalt mixing plant. The closing time of the second electronic switch 24 is set by the timer in the total control system 20 of the asphalt mixing plant, so that the working time after the delivery pump 1 and the second electric valve 3 is opened is 10 seconds; The control system 20 starts the mixing motor 16 of the mixing tank, and at the same time, the overall control system 20 of the asphalt mixing plant controls the second electronic switch 24 to close, the delivery pump 1 and the second electric valve 3 are opened, and the delivery pump 1 extracts the surface of the stone from the raw material barrel Modifier, the stone surface modifier is transported to the second atomizing nozzle device 13 through the second pipeline 52; the second atomizing nozzle device 13 sprays the inside 15 of the mixing cylinder, and waits for the second atomizing nozzle device 13 to spray for 2 seconds Finally, the general control system 20 of the asphalt mixing plant controls the opening of the lower bin door 12 of the hot aggregate, and the stone materials in the four bins A, B, C, and D of the hot aggregate bins are mixed according to the mass ratio of 30:30:30:10. 3 tons of stones fall into the mixing tank 15, driven by the stirring blades, the entire surface of the stones is covered by the surface modifier of the stones, realizing secondary surface modification of the stones; at the same time, the second electronic flowmeter 4 on the second pipeline 52 Detect the amount of the stone surface modifier sprayed into the mixing tank by the second atomizing nozzle device 13; accurately control 2 kg of the stone surface modifier to be sprayed into the screening bin 10 through the second electronic flowmeter 7;

S4. After the delivery pump 1 and the second electric valve 3 have been running for 10 seconds, the control unit controls the second electronic switch 24 to be disconnected, the delivery pump and the second electric valve are disconnected from the power supply, and the second atomizing nozzle device 13 stops spraying. Bulk stone surface modifier, add asphalt and powder from the first inlet 26 and second inlet 27 of the mixing tank 15 of the asphalt mixing plant, and stir the asphalt, stone, powder and other mixtures for 30 to 45 seconds. After the mixing is finished, the general control system 20 of the asphalt mixing plant controls the bottom door 17 of the mixing tank to open, and the mixture falls into the waiting car 18 .

In this embodiment, when the first electronic flowmeter 7 in step S1 detects that the injection amount of the stone surface modifier of the first atomizing nozzle device 8 is less than or exceeds the preset flow rate, or when the second electronic flowmeter in step S3 4. When it is detected that the amount of stone surface modifier sprayed into the second atomizing nozzle device 13 is less than or exceeds the preset flow rate, or when an emergency occurs, the red light in the alarm device flashes to give an alarm, and the control unit controls the third electronic switch 25 is disconnected, at this moment, the delivery pump 1, the first electric valve 6 and the second electric valve 3 are all powered off and closed, and the whole atomizing device stops working.

The flow parameters of the stone surface modifier detected by the first electronic flowmeter 7 and the second electronic flowmeter 4 in this embodiment can be displayed through the man-machine interface 21 of the general control system 20 of the asphalt mixing plant.

In this embodiment, when the first surface modification is to be carried out on the stone, that is, when the first atomizing nozzle device sprays, the working time of the delivery pump and the first electric valve 6 is carried out according to the first surface modification of the stone. The required amount of stone surface modifier is set. Similarly, when carrying out the second surface modification of stone materials, that is, when the second atomizing nozzle device 13 is spraying, the working time after the delivery pump 1 and the second electric valve 3 are opened is based on the time when the stone materials are subjected to the second surface modification. The required amount of stone surface modifier is set.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (8)

1. The stone surface modification atomization device connected to the asphalt mixing plant is characterized in that it includes a control unit, a raw material barrel for placing the stone surface modifier, a delivery pump, a first electronic switch, a second electronic switch, The first atomizing nozzle device and the second atomizing nozzle device; One end of the delivery pump communicates with the raw material barrel; the other end of the delivery pump communicates with the first atomizing nozzle device through the first pipeline, and the other end of the delivery pump communicates with the second atomizing nozzle device through the second pipeline connected; the first pipeline is provided with a first electric valve, and the second pipeline is provided with a second electric valve; The first atomizing nozzle device is set on the upper part of the screening bin of the asphalt mixing plant; the second atomizing nozzle device is set on the mixing tank of the asphalt mixing plant; The delivery pump and the first electric valve are connected to the power supply through the first electronic switch; the delivery pump and the second electric valve are connected to the power supply through the second electronic switch; the first electronic switch and the second electronic switch are respectively connected to the control The unit is connected, and the working state of the first electronic switch and the second electronic switch is controlled by the control unit; The first atomizing nozzle device and the second atomizing nozzle device all include a plurality of multi-directional atomizing nozzles, wherein the atomizing nozzles in each direction in the first atomizing nozzle device are all facing the screening chamber, and the second atomizing nozzle device The atomizing nozzles in all directions in the atomizing nozzle device are facing the inside of the mixing tank; The atomizing device also includes a third electronic switch connected to the control unit; wherein the delivery pump, the first electric valve, the second electric valve and the third electronic switch are all connected in series. 2. The stone material surface modification atomization device docked on the asphalt mixing plant according to claim 1, wherein each atomization nozzle in the second atomization nozzle device is evenly embedded in the cover plate, so The cover plate is pasted on the inner wall of the mixing tank of the asphalt mixing plant. 3. The stone material surface modification atomization device docked to the asphalt mixing plant according to claim 1, characterized in that, the first pipeline is provided with a first electronic flowmeter connected to the control unit, and the first The second pipeline is provided with a second electronic flowmeter connected with the control unit. 4. The stone surface modification atomization device docked in the asphalt mixing plant according to claim 1, characterized in that the control unit is mainly composed of a control box and the total control system of the asphalt mixing plant, the first electronic The switch, the second electronic switch and the third electronic switch are all arranged in the control box; and the first electronic switch, the second electronic switch and the third electronic switch are all connected with the general control system of the asphalt mixing plant in the control unit ; The overall control system of the asphalt mixing plant is also connected with an alarm device. 5. A control method for a stone surface modification atomization device connected to an asphalt mixing plant, characterized in that it comprises the following steps: S1. The control unit controls the first electronic switch to be closed, the delivery pump and the first electric valve are opened, the delivery pump extracts the stone surface modifier from the raw material barrel, and the stone surface modifier is transported to the first atomizing nozzle device through the first pipeline At the same time, the stone material enters the screening chamber of the asphalt mixing building, and the first atomizing nozzle device sprays the stone material in the screening chamber to modify the surface of the stone material for the first time, and completes the first modification of the stone material surface. sex; S2. After the delivery pump and the first electric valve run for a time t1, the control unit controls the first electronic switch to be disconnected, the delivery pump and the first electric valve are closed, and the first atomizing nozzle device stops spraying; S3. After the first atomizing nozzle device stops spraying, start the mixing motor of the asphalt mixing plant, then the control unit controls the second electronic switch to close, the input pump and the second electric valve start, and the delivery pump extracts the surface of the stone from the raw material barrel Modifier, the stone surface modifier is transported to the second atomizing nozzle device through the second pipeline, and the second atomizing nozzle device sprays against the mixing tank. After the second atomizing nozzle device sprays for t2, the asphalt mixing The building will pour the stone material that has been screened by the screening chamber and completed the first surface modification in step S1 into the mixing tank. modified; S4. After the delivery pump and the second electric valve have been running for t3, the control unit controls the second electronic switch to be disconnected, the delivery pump and the second electric valve are closed, the second atomizing nozzle device stops spraying, and the second spraying on the stone surface is completed. secondary modification. 6. The method for controlling the atomization device for modifying the surface of stones connected to the asphalt mixing plant according to claim 5, characterized in that, in the step S1, the first electronic flowmeter installed in the first pipeline Detect the amount of the stone surface modifier sprayed into the screening chamber by the first atomizing nozzle device; in the step S3, the second electronic flowmeter arranged in the second pipeline detects The amount of stone surface modifier added to the mixing tank. 7. The control method of the stone surface modification atomization device connected to the asphalt mixing plant according to claim 6, characterized in that, when the first electronic flowmeter detects the first atomization nozzle device in the step S1 When the injection amount of the stone surface modifier is less than or exceeds the preset flow rate, or when the second electronic flowmeter detects that the injection amount of the stone surface modifier of the second atomizing nozzle device is less than or exceeds the preset flow rate , the alarm device connected to the control unit gives an alarm, and at the same time the control unit controls the third electronic switch to be disconnected, and the delivery pump, the first electric valve and the second electric valve are all powered off and closed. 8. The control method of the stone surface modification atomization device docked to the asphalt mixing plant according to claim 5, characterized in that the control unit sets the time t1, t2 and t3 according to the amount of stone used.