Treatment system for production of asphalt mixing plant

Abstract

The utility model relates to the technical field of asphalt mixing plant production processing, in particular to a processing system for asphalt mixing plant production, which comprises a first electromagnetic valve EV1 for controlling opening of a bin gate of an asphalt mixing plant and a wire outlet terminal connected with the first electromagnetic valve EV1, and a power supply circuit is arranged on one side of the first electromagnetic valve EV1. The power supply circuit comprises a switch battery V1 and a first double-control relay K2, an electromagnetic coil of the first double-control relay K2 is connected with the power supply end of the switch battery V1, and a first contact switch of the first double-control relay K2 and a second contact switch of the first double-control relay K2 are connected with the two ends of a first electromagnetic valve EV1 respectively. And the first electromagnetic valve EV1 is connected with the switch battery V1 or the outgoing line terminal through a first contact switch of the first double-control relay K2 and a second contact switch of the first double-control relay K2. According to the processing system for production of the asphalt mixing plant, the bin gate can be conveniently controlled to be kept open, and the bin gate can be conveniently controlled to be closed.

Description

Technical Field

[0001] The utility model relates to the technical field of production and processing of asphalt mixing stations, in particular to a processing system for production of asphalt mixing stations. Background Art

[0002] Asphalt pavement has become the preferred paving material for transportation facilities such as highways, airports and ports due to its smooth surface, comfortable driving experience, excellent shock absorption effect, low noise, and the recyclability of old asphalt mixture. The excellent quality and service life of asphalt pavement depend on the quality of asphalt mixture and the level of paving technology. This asphalt mixture is produced and prepared by asphalt mixing plants. Therefore, asphalt mixing plants have a direct impact on the excellent quality and service life of asphalt pavement, which also makes asphalt mixing plants widely used in the construction of large-scale projects such as highways, airports and ports. The composition of asphalt mixing equipment mainly includes batching system, drying system, combustion system, hot material lifting, vibrating screen, hot material storage bin, weighing and mixing bin, finished product bin and dust removal system. For this reason, the production process of asphalt mixing plant mainly includes raw material storage and processing, raw material weighing and mixing, asphalt mixing, dust removal, finished asphalt packaging and other steps. This means that the manufacturing process of asphalt mixing plant covers a series of links such as raw material storage and processing, raw material weighing and mixing, asphalt mixing, dust removal and finished asphalt packaging.

[0003] After the asphalt mixing station is completed, due to the viscosity of asphalt, there is often asphalt residue adsorbed on the side wall of the silo and the silo door of the discharge port in the mixing silo and the finished product silo. If the asphalt residue is not cleaned, then when the asphalt concrete mixing station is restarted, the asphalt residue adsorbed on the side wall of the silo and the silo door of the discharge port will affect the opening of the silo door. In order to open the silo door, before restarting the asphalt concrete mixing station, it is necessary to heat the mixing silo discharge port and the finished product silo discharge port to heat the asphalt residue remaining on the silo door so that the silo door can be opened. However, such preheating treatment will waste electricity and time when the machine is started next time. In order to overcome this technical problem, it is necessary to keep the silo door open by adjusting the operation control system after the mixing station is completed, wait for 1 to 2 hours, let the asphalt residue adsorbed on the silo door and silo wall cool and solidify, and then close the silo door to avoid the asphalt residue affecting the production and processing again. In addition, the asphalt concrete mixing station needs to reduce the pressure in the gas storage tank after production, which means that after production, the operator has to pay attention to the pressure in the gas storage tank while observing the cooling and solidification state of the asphalt residue, which brings a heavy workload to the operator. Therefore, there are areas for improvement in the control of the asphalt mixing station after production is completed to simplify the workload of the operator. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides an asphalt mixing station production processing system that is convenient for controlling a bin door to remain open and convenient for controlling a bin door to be closed, so as to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is: a processing system for asphalt mixing plant production, including a first solenoid valve EV1 for controlling the opening of a bin door of the asphalt mixing plant and an outlet terminal connected to the first solenoid valve EV1, a power supply circuit is arranged on one side of the first solenoid valve EV1; the power supply circuit includes a switch battery V1 and a first double-controlled relay K2, the electromagnetic coil of the first double-controlled relay K2 is connected to the power supply end of the switch battery V1, the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2 are respectively connected to the two ends of the first solenoid valve EV1, and the first solenoid valve EV1 is connected to the power supply end of the switch battery V1 through the first contact switch of the first double-controlled relay K2 and the first double-controlled relay K2. The second contact switch of K2 is connected to the switch battery V1 or the output terminal, the first normally open contact of the first double-controlled relay K2 and the second normally open contact of the first double-controlled relay K2 are respectively connected to the power supply end of the switch battery V1, and the first normally closed contact of the first double-controlled relay K2 and the second normally closed contact of the first double-controlled relay K2 are respectively connected to the output terminal; a control circuit is arranged on the control end of the switch battery V1; the control circuit comprises an air switch S2 and an electric contact pressure gauge B1 connected to the air switch S2, the control end of the switch battery V1 is connected to the air switch S2 through the contact switch of the electric contact pressure gauge B1, and the normally open contact of the electric contact pressure gauge B1 is connected to the switch battery V1.

[0006] Preferably, a UPS power supply TC is provided on one side of the air switch S2, and the UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1. A fuse F1 is provided between the UPS power supply TC and the intermediate relay K1, and the UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1 through the fuse F1. The air switch S2 is connected to the control end of the switch battery V1 through the contact switch of the intermediate relay K1, and the normally closed contact of the intermediate relay K1 is connected to the switch battery V1.

[0007] Preferably, an indicator light H2 is provided between the electric contact pressure gauge B1 and the intermediate relay K1, and two ends of the indicator light H2 are respectively connected to the normally closed contact of the electric contact pressure gauge B1 and the normally open contact of the intermediate relay K1.

[0008] Preferably, a buzzer SP is connected in parallel to one side of the indicator light H2.

[0009] Preferably, an indicator light H1 is connected in parallel to one side of the electromagnetic coil of the first double-controlled relay K2.

[0010] Preferably, a time relay KT1 is arranged between the first double-controlled relay K2 and the switch battery V1, the electromagnetic coil of the first double-controlled relay K2 is connected to the switch battery V1 through the contact switch of the time relay KT1, the normally open contact of the time relay KT1 is connected to the electromagnetic coil of the first double-controlled relay K2, and the contact switch of the time relay KT1 and the electromagnetic coil of the first double-controlled relay K2 are connected in parallel with the electromagnetic coil of the time relay KT1.

[0011] Preferably, a second solenoid valve EV2 is provided on one side of the first solenoid valve EV1, and an electromagnetic coil of a second double-controlled relay K3 is connected in parallel to one side of the electromagnetic coil of the first double-controlled relay K2. The first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3 are respectively connected to the two ends of controlling the second solenoid valve EV2. The second solenoid valve EV2 is connected to the switching battery V1 or the output terminal through the first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3. The first normally open contact of the second double-controlled relay K3 and the second normally open contact of the second double-controlled relay K3 are respectively connected to the power supply end of the switching battery V1, and the first normally closed contact of the second double-controlled relay K3 and the second normally closed contact of the second double-controlled relay K3 are respectively connected to the output terminal.

[0012] The beneficial effects of the utility model are as follows: first, the utility model is connected to the first solenoid valve EV1 and the control system of the asphalt mixing plant through the output terminals respectively set, and the control system can be used to control the first solenoid valve EV1 to supply or cut off the power, so as to use the control system to control the opening or closing of the bin door, so as to complete the asphalt discharge operation. Moreover, the utility model is convenient to switch the power supply mode of the first solenoid valve EV1 through the first double-controlled relay K2 set. If the switch battery V1 does not receive the opening signal, the electromagnetic coil of the first double-controlled relay K2 is in a disconnected state, so that the first solenoid valve EV1 is powered through the output terminals; on the contrary, if the switch battery V1 receives the opening signal, the electromagnetic coil of the first double-controlled relay K2 is in a powered state, so that the switch battery V1 supplies power to the first solenoid valve EV1, so as to control the bin door of the asphalt mixing plant to remain open, so that the asphalt residue adsorbed on the bin door and the bin wall is cooled and solidified, so as to avoid the bin door being difficult to open when producing asphalt again. In addition, the utility model controls the power supply and power failure of the switch battery V1 through a control circuit, wherein the pressure-sensing end of the electric contact pressure gauge B1 is installed in the gas tank of the mixing station, so that the power supply condition of the switch battery V1 is that the air switch S2 is closed and the gas tank of the mixing station exceeds the set pressure of the electric contact pressure gauge B1. Therefore, when the gas tank of the mixing station is reduced to the set pressure of the electric contact pressure gauge B1, the contact switch of the electric contact pressure gauge B1 is disconnected, thereby controlling the switch battery V1 to cut off the power, so that the first solenoid valve EV is powered off, and then the warehouse door is closed under the action of its own weight or spring, thereby replacing the operator to operate the warehouse door closing, so as to simplify the operator's workload.

[0013] Secondly, the utility model sets an intermediate relay K1 between the UPS power supply TC and the control circuit. During the production process of the asphalt mixing station, the UPS power supply TC is powered on, and the contact switch of the intermediate relay K1 is controlled to be closed, so that the control circuit is in a disconnected state. On the contrary, after the production of the asphalt mixing station is completed, the asphalt mixing station is closed, so that the UPS power supply TC is disconnected and closed, so that the control circuit is controlled by the air switch S2 and the electric contact pressure gauge B1. Under the condition that the air switch S2 is closed and the gas tank of the mixing station exceeds the set pressure of the electric contact pressure gauge B1, the power supply circuit is used to control the door of the asphalt concrete mixing station to be continuously opened. In addition, the utility model sets an indicator light H2. During the production process of the asphalt mixing station, when the pressure of the gas tank of the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the indicator light H2 lights up to remind that the pressure of the gas tank of the asphalt mixing station is low, and through the buzzer SP connected in parallel to one side of the indicator light H2, when the indicator light H2 lights up, the buzzer SP emits a reminder sound to improve the effect of reminding that the gas tank pressure is low.

[0014] Thirdly, the utility model sets an indicator light H1, and when the switch battery V1 controls the door of the asphalt mixing station to be continuously opened, the indicator light H1 will light up, so that the operator can grasp the information of the door opening, and the time relay KT1 is set to delay the switch battery V1 to control the door opening time of the asphalt mixing station, so as to control the door opening time after the asphalt mixing station is closed. In addition, the utility model sets a second solenoid valve EV2 and a second double-controlled relay K3, so as to facilitate the use of the power supply circuit or the output terminal to control the door switches of multiple asphalt mixing stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a circuit system diagram of the utility model. DETAILED DESCRIPTION

[0016] like Figure 1As shown, a processing system for asphalt mixing plant production includes a first solenoid valve EV1 for controlling the opening of a bin door of the asphalt mixing plant and an outlet terminal 1 connected to the first solenoid valve EV1, a power supply circuit is arranged on one side of the first solenoid valve EV1; the power supply circuit includes a switch battery V1 and a first double-controlled relay K2, the electromagnetic coil of the first double-controlled relay K2 is connected to the power supply end of the switch battery V1, the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2 are respectively connected to the two ends of the first solenoid valve EV1, the first solenoid valve EV1 is connected to the switch battery V1 or the outlet terminal 1 through the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2, ... The first normally open contact of the relay K2 and the second normally open contact of the first double-controlled relay K2 are respectively connected to the power supply end of the switch battery V1, and the first normally closed contact of the first double-controlled relay K2 and the second normally closed contact of the first double-controlled relay K2 are respectively connected to the output terminal 1; a control circuit is provided on the control end of the switch battery V1; if the switch battery V1 does not receive the start signal, the electromagnetic coil of the first double-controlled relay K2 is in a disconnected state, and for this reason, the output terminal 1 is connected to the first electromagnetic valve EV1 through the first normally closed contact of the first double-controlled relay K2 and the second normally closed contact of the first double-controlled relay K2, so that the power supply of the first electromagnetic valve EV1 is controlled by controlling the output terminal 1 to be powered on or off, that is, the bin door of the asphalt mixing plant is controlled to be opened or closed. If the switch battery V1 receives an opening signal, the electromagnetic coil of the first double-controlled relay K2 is energized, and the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2 are magnetically attracted by the electromagnetic coil of the first double-controlled relay K2 to be closed, thereby controlling the switch battery V1 to power the first solenoid valve EV1, so as to control the bin door of the asphalt mixing plant to remain open. The control circuit includes an air switch S2 and an electric contact pressure gauge B1 connected to the air switch S2, the control end of the switch battery V1 is connected to the air switch S2 through the contact switch of the electric contact pressure gauge B1, and the normally open contact of the electric contact pressure gauge B1 is connected to the switch battery V1. The air switch S2 is connected to the power supply circuit of the asphalt mixing station, and the pressure-sensing end of the electric contact pressure gauge B1 is installed in the gas tank of the mixing station. When the gas tank of the mixing station exceeds the set pressure of the electric contact pressure gauge B1, the electric contact pressure gauge B1 is in a closed state, and by operating the air switch S2 to close it, the compartment door can be controlled to be continuously opened. For this reason, as the gas tank of the mixing station is reduced to the set pressure of the electric contact pressure gauge B1, the electric contact pressure gauge B1 is disconnected, thereby controlling the control end of the switch battery V1 to be powered off, and then controlling the power supply circuit to be powered off, that is, the first solenoid valve EV1 loses power, and the compartment door of the asphalt concrete mixing station is closed under the action of its own weight or the elasticity of the spring, instead of the operator operating the compartment door to close.

[0017] In this embodiment, a UPS power supply TC is provided on one side of the air switch S2, and the UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1, and a fuse F1 is provided between the UPS power supply TC and the intermediate relay K1, and the UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1 through the fuse F1, and the air switch S2 is connected to the control end of the switch battery V1 through the contact switch of the intermediate relay K1, and the normally closed contact of the intermediate relay K1 is connected to the switch battery V1. During the production process of the asphalt mixing station, the UPS power supply TC is powered on; on the contrary, after the production of the asphalt mixing station is completed, the asphalt mixing station is closed, so that the UPS power supply TC is disconnected and closed. For this purpose, the electromagnetic coil of the intermediate relay K1 magnetically attracts the contact switch of the intermediate relay K1 to close, so that the control circuit is disconnected to avoid the control circuit from being misused to control the opening of the bin door of the asphalt concrete mixing station during the production process of the asphalt mixing station; after the production of the asphalt mixing station is completed, the asphalt mixing station is closed, so that the UPS power supply TC is in the off state, and the electromagnetic coil of the intermediate relay K1 is powered off, so that the control circuit is controlled by the air switch S2 and the electric contact pressure gauge B1, that is, after the production of the asphalt mixing station is completed, under the conditions that the air switch S2 is closed and the air tank of the mixing station exceeds the set pressure of the electric contact pressure gauge B1, the power supply circuit is used to control the bin door of the asphalt concrete mixing station to continue to open.

[0018] Specifically, an indicator light H2 is provided between the electric contact pressure gauge B1 and the intermediate relay K1, and the two ends of the indicator light H2 are respectively connected to the normally closed contact of the electric contact pressure gauge B1 and the normally open contact of the intermediate relay K1. Therefore, during the production process of the asphalt mixing station, the UPS power supply TC is powered on, and the electromagnetic coil of the intermediate relay K1 magnetically attracts the contact switch of the intermediate relay K1 to close. If the pressure of the gas tank of the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the indicator light H2 lights up to remind the operator that the pressure of the gas tank of the mixing station is low, thereby facilitating the operator to adjust the pressure of the gas tank in time to meet the needs of production and use of the asphalt mixing station.

[0019] It should be noted that a buzzer SP is connected in parallel to one side of the indicator light H2. Therefore, during the production process of the asphalt mixing station, if the pressure of the gas storage tank of the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the buzzer SP will emit a reminder sound to improve the effect of reminding that the gas storage tank pressure is low.

[0020] In this embodiment, an indicator light H1 is connected in parallel to one side of the electromagnetic coil of the first double-controlled relay K2. When the power supply circuit is used to control the first electromagnetic valve EV1 to open the door of the asphalt mixing plant, the indicator light H1 will light up to facilitate the operator to grasp the information of the door opening.

[0021] In this embodiment, a time relay KT1 is provided between the first double-controlled relay K2 and the switch battery V1, the electromagnetic coil of the first double-controlled relay K2 is connected to the switch battery V1 through the contact switch of the time relay KT1, the normally open contact of the time relay KT1 is connected to the electromagnetic coil of the first double-controlled relay K2, and the contact switch of the time relay KT1 and the electromagnetic coil of the first double-controlled relay K2 are connected in parallel with the electromagnetic coil of the time relay KT1. When the switch battery V1 receives the start signal, the electromagnetic coil of the time relay KT1 is gradually energized according to the set time, and when the set time of the time relay KT1 is reached, the electromagnetic coil of the time relay KT1 magnetically attracts the contact switch of the time relay KT1 to close, so that the electromagnetic coil of the first double-controlled relay K2 is energized, and then the switch battery V1 is used to power the first electromagnetic valve EV1, so as to control the opening of the door of the asphalt mixing station.

[0022] It should be noted that a second solenoid valve EV2 is provided on one side of the first solenoid valve EV1, and a second solenoid coil of a second double-controlled relay K3 is connected in parallel to one side of the solenoid coil of the first double-controlled relay K2. The first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3 are respectively connected to the two ends of the second solenoid valve EV2. The second solenoid valve EV2 is connected to the switch battery V1 or the outlet terminal 1 through the first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3. The first normally open contact of the second double-controlled relay K3 and the second normally open contact of the second double-controlled relay K3 are respectively connected to the power supply end of the switch battery V1, and the first normally closed contact of the second double-controlled relay K3 and the second normally closed contact of the second double-controlled relay K3 are respectively connected to the outlet terminal 1. This makes it convenient to use the power supply circuit or the outlet terminal 1 to control the door switches of multiple asphalt mixing plants.

[0023] During the production process of the asphalt mixing station, when the pressure of the gas tank installed on the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the indicator H2 lights up and the buzzer SP sounds to remind the mixing station that the gas tank pressure is low. The specific usage is as follows: Figure 1As shown, during the production process of the asphalt mixing station, when the UPS power supply TC is powered on and the air switch S2 is closed, the electromagnetic coil of the intermediate relay K1 magnetically attracts the contact switch of the intermediate relay K1 to close. If the pressure of the gas storage tank of the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the contact switch of the electric contact pressure gauge B1 is disconnected, so that the indicator light H2 and the buzzer SP are powered on to remind that the pressure of the assembled gas storage tank is lower than the set pressure of the electric contact pressure gauge B1. On the contrary, if the pressure of the gas storage tank of the asphalt mixing station is higher than the set pressure of the electric contact pressure gauge B1, the contact switch of the electric contact pressure gauge B1 is closed, so that the indicator light H2 and the buzzer SP are disconnected. It should be noted that when the asphalt mixing station is closed, the pressure of the gas tank of the asphalt mixing station is about 0.5Mpa. After the gas tank is slowly depressurized for four hours, the pressure of the gas tank of the asphalt mixing station is reduced to about 0.3Mpa, which fully meets the cooling and solidification conditions of the asphalt residue adsorbed on the silo door and silo wall. For this reason, the set pressure of the electric contact pressure gauge B1 is preferably 0.3Mpa.

[0024] After the asphalt mixing station is finished, this system controls the asphalt mixing station's door to open after the set time of the time relay KT1, and closes the asphalt mixing station's door when the pressure of the asphalt mixing station's gas storage tank is lower than the set pressure of the electric contact pressure gauge B1. The specific usage is as follows: Figure 1 As shown, after the asphalt mixing station is shut down, the UPS power supply TC is in a power-off state, the control air switch S2 is in a closed state, and when the pressure of the gas storage tank of the asphalt mixing station is higher than the set pressure of the electric contact pressure gauge B1, the switch battery V1 receives an opening signal, so that the power supply end of the switch battery V1 is energized and turned on, and the electromagnetic coil of the time relay KT1 is gradually energized according to the set time. After the set time of the time relay KT1 is reached, the electromagnetic coil of the time relay KT1 magnetically attracts the contact switch of the time relay KT1 to close, so that the electromagnetic coil of the first double-controlled relay K2 and the electromagnetic coil of the second double-controlled relay K3 are The coil is energized, and then the switch battery V1 is used to power the first solenoid valve EV1 and the second solenoid valve EV2, so as to control the opening of the warehouse door of the asphalt mixing station; then, as the pressure of the gas tank of the asphalt mixing station gradually decreases, if the pressure of the gas tank of the asphalt mixing station is lower than the set pressure of the electric contact pressure gauge B1, the electric contact pressure gauge B1 is disconnected, so that the power supply circuit and the control circuit are disconnected, that is, the first solenoid valve EV1 and the second solenoid valve EV2 are disconnected, so that the warehouse door of the asphalt mixing station is closed under the action of its own weight or spring, so that the asphalt mixing station can resume production.

[0025] Through this embodiment, the outlet terminal 1 is respectively connected to the first solenoid valve EV1 and the control system of the asphalt mixing plant, and the control system can be used to control the first solenoid valve EV1 to power on or off, so as to use the control system to control the opening or closing of the bin door, so as to complete the asphalt discharge operation. In addition, the first double-controlled relay K2 is set in this embodiment to facilitate switching the power supply mode of the first solenoid valve EV1. If the switch battery V1 does not receive the start signal, the electromagnetic coil of the first double-controlled relay K2 is in a disconnected state, so that the first solenoid valve EV1 is powered through the outlet terminal 1; on the contrary, if the switch battery V1 receives the start signal, the electromagnetic coil of the first double-controlled relay K2 is in a powered state, so that the switch battery V1 powers the first solenoid valve EV1, so as to control the bin door of the asphalt mixing plant to remain open, so that the asphalt residue adsorbed on the bin door and the bin wall is cooled and solidified, so as to avoid the bin door being difficult to open when producing asphalt again. In addition, this embodiment controls the power supply and power failure of the switch battery V1 through a set control circuit, wherein the pressure-sensing end of the electric contact pressure gauge B1 is installed in the gas tank of the mixing station, so that the power supply condition of the switch battery V1 is that the air switch S2 is closed and the gas tank of the mixing station exceeds the set pressure of the electric contact pressure gauge B1. Therefore, as the gas tank of the mixing station is reduced to the set pressure of the electric contact pressure gauge B1, the contact switch of the electric contact pressure gauge B1 is disconnected, thereby controlling the switch battery V1 to cut off the power, so that the first solenoid valve EV is powered off, and then the warehouse door is closed under the action of its own weight or spring, thereby replacing the operator to operate the warehouse door closing, so as to simplify the operator's workload.

[0026] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A processing system for production of an asphalt mixing plant, comprising a first solenoid valve EV1 for controlling the opening of a door of the asphalt mixing plant and an outlet terminal (1) connected to the first solenoid valve EV1, characterized in that: A power supply circuit is provided on one side of the first solenoid valve EV1; The power supply circuit comprises a switch battery V1 and a first double-controlled relay K2, the electromagnetic coil of the first double-controlled relay K2 is connected to the power supply end of the switch battery V1, the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2 are respectively connected to the two ends of the first electromagnetic valve EV1, the first electromagnetic valve EV1 is connected to the switch battery V1 or the output terminal (1) through the first contact switch of the first double-controlled relay K2 and the second contact switch of the first double-controlled relay K2, the first normally open contact of the first double-controlled relay K2 and the second normally open contact of the first double-controlled relay K2 are respectively connected to the power supply end of the switch battery V1, and the first normally closed contact of the first double-controlled relay K2 and the second normally closed contact of the first double-controlled relay K2 are respectively connected to the output terminal (1); a control circuit is arranged on the control end of the switch battery V1; The control circuit includes an air switch S2 and an electric contact pressure gauge B1 connected to the air switch S2. The control end of the switch battery V1 is connected to the air switch S2 through the contact switch of the electric contact pressure gauge B1. The normally open contact of the electric contact pressure gauge B1 is connected to the switch battery V1.

2. The processing system for asphalt mixing plant production according to claim 1, characterized in that: A UPS power supply TC is provided on one side of the air switch S2, and the UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1. A fuse F1 is provided between the UPS power supply TC and the intermediate relay K1. The UPS power supply TC is connected to the electromagnetic coil of the intermediate relay K1 through the fuse F1. The air switch S2 is connected to the control end of the switch battery V1 through the contact switch of the intermediate relay K1, and the normally closed contact of the intermediate relay K1 is connected to the switch battery V1.

3. The processing system for asphalt mixing plant production according to claim 2 is characterized by: An indicator light H2 is provided between the electric contact pressure gauge B1 and the intermediate relay K1, and two ends of the indicator light H2 are respectively connected to the normally closed contact of the electric contact pressure gauge B1 and the normally open contact of the intermediate relay K1.

4. The processing system for asphalt mixing plant production according to claim 3 is characterized by: A buzzer SP is connected in parallel to one side of the indicator light H2.

5. The processing system for asphalt mixing plant production according to claim 1, characterized in that: An indicator light H1 is connected in parallel to one side of the electromagnetic coil of the first double-controlled relay K2.

6. The processing system for asphalt mixing plant production according to claim 1, characterized in that: A time relay KT1 is arranged between the first double-controlled relay K2 and the switch battery V1. The electromagnetic coil of the first double-controlled relay K2 is connected to the switch battery V1 through the contact switch of the time relay KT1. The normally open contact of the time relay KT1 is connected to the electromagnetic coil of the first double-controlled relay K2. The contact switch of the time relay KT1 and the electromagnetic coil of the first double-controlled relay K2 are connected in parallel with the electromagnetic coil of the time relay KT1.

7. The processing system for asphalt mixing plant production according to claim 1, characterized in that: A second solenoid valve EV2 is provided on one side of the first solenoid valve EV1, and an solenoid coil of a second double-controlled relay K3 is connected in parallel to one side of the solenoid coil of the first double-controlled relay K2. The first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3 are respectively connected to the two ends of the second solenoid valve EV2. The second solenoid valve EV2 is connected to the switch battery V1 or the output terminal (1) through the first contact switch of the second double-controlled relay K3 and the second contact switch of the second double-controlled relay K3. The first normally open contact of the second double-controlled relay K3 and the second normally open contact of the second double-controlled relay K3 are respectively connected to the power supply end of the switch battery V1, and the first normally closed contact of the second double-controlled relay K3 and the second normally closed contact of the second double-controlled relay K3 are respectively connected to the output terminal (1).

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