A hot asphalt mixture conveying device and control method thereof

Abstract

A hot asphalt mixture conveying device includes a head assembly provided with a driving mechanism, a bottom assembly provided with a passive wheel assembly, and a plurality of middle-section assemblies installed between the head assembly and the bottom assembly, an annular conveying chain is connected between the driving mechanism and the passive wheel assembly, a plurality of hoppers are fixed at intervals on the outer side of the annular conveying chain, a feeding chute is installed on the side of the bottom assembly to allow the hot asphalt mixture to slide onto the hopper, and a discharging chute is also installed on the side of the head assembly to discharge the hot asphalt mixture thrown out of the hopper. The invention can prevent the leakage of asphalt smoke and heat, which is not only energy-saving and environmentally friendly, but also reduces the structural height of the equipment, greatly reducing the construction cost of the mixing station, and at the same time, the on-site layout method is more flexible and can adapt to the different site restrictions of customers.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt conveying equipment, and in particular to a hot asphalt mixture conveying device and a control method thereof. Background Art

[0002] Asphalt mixture mixing equipment refers to a device that dries, heats, screens, and measures gravel, adds an appropriate amount of filler (stone powder), and mixes it with hot asphalt liquid in a certain proportion to form an asphalt mixture. The hot asphalt mixture conveying system is one of its important components.

[0003] Traditional hot asphalt mixtures are mostly transported by carts, which have many disadvantages such as difficult sealing, asphalt fume pollution, and rapid heat loss. With the improvement of environmental protection requirements, factory-type asphalt mixing plants are becoming more and more popular in the market, but factories often have restrictions on the height of equipment. For the current factory-mixed hot recycling equipment and original equipment, there is no ideal hot asphalt mixture conveying equipment. Most of them put the recycling drum on the roof and adopt the bottom-mounted finished product warehouse, which causes the building to exceed the factory limit requirements and greatly increases the construction cost of the mixing station. To this end, we provide a hot asphalt mixture conveying device and a control method thereof. Summary of the invention

[0004] The present invention provides a hot asphalt mixture conveying device and a control method thereof, the main purpose of which is to solve the shortcomings of the existing hot asphalt mixture conveying device trolley transportation method, such as difficult sealing, asphalt fume emission polluting the environment, and rapid heat loss.

[0005] The present invention adopts the following technical solution:

[0006] A hot asphalt mixture conveying device comprises a head assembly provided with a driving mechanism, a bottom assembly provided with a passive wheel assembly and a plurality of middle-section assemblies installed between the head assembly and the bottom assembly, an annular conveying chain is connected between the driving mechanism and the passive wheel assembly, a plurality of hoppers are fixed at intervals on the outside of the annular conveying chain, a feeding chute for allowing hot asphalt mixture to slide onto the hopper is installed on the side of the bottom assembly, and a discharging chute for discharging the hot asphalt mixture thrown out of the hopper is also installed on the side of the head assembly.

[0007] Furthermore, a temperature sensor is provided in the shell of the head assembly.

[0008] Furthermore, a hot flue gas inlet is provided on the side of the shell assembled at the bottom, and the hot flue gas inlet is connected to the exhaust gas emission pipeline of the regeneration equipment; a hot flue gas exhaust port is provided on the upper part of the shell assembled at the head, and the hot flue gas exhaust port is connected to the original drying drum burner.

[0009] Furthermore, a plurality of near-infrared heaters are installed on the inner side of the shell of the middle component corresponding to the rising end of the ring-shaped conveyor chain.

[0010] Furthermore, a plurality of bridges corresponding to the near-infrared heaters are installed on the outer side of the shell of the middle component.

[0011] The transmission device of the present invention also includes a host computer and a slave computer, the host computer is communicatively connected to the slave computer, the near-infrared heater is communicatively connected to the slave computer, the slave computer includes a CPU processor and an AD analog-to-digital conversion unit, and the temperature sensor is communicatively connected to the CPU processor via the AD analog-to-digital conversion unit.

[0012] Furthermore, closed-cell foam sealing strips are provided on all connecting flange surfaces between the middle components, between the middle component and the head assembly, between the bottom assembly, between the feed chute and the bottom assembly, and between the discharge chute and the head assembly.

[0013] Furthermore, the shell of the head assembly, the shell of the middle assembly, the shell of the bottom assembly, the feed chute and the discharge chute are all provided with thermal insulation cotton.

[0014] Furthermore, a heat transfer oil insulation pipe is provided on the bottom arc plate of the bottom assembly shell; and a heat transfer oil insulation pipe is also provided on the feed chute and the discharge chute.

[0015] The present invention also provides a control method for a hot asphalt mixture conveying device, which is specifically as follows:

[0016] (1) The upper computer receives the start-up input signal, and the lower computer establishes a communication connection with the upper computer and controls the driving mechanism of the head assembly to operate, so that the hopper moves in a circular motion along the circular conveyor chain, and continuously takes materials from the feed chute assembled at the bottom, while passing the hot flue gas of the regeneration equipment into the conveying device;

[0017] (2) The temperature sensor monitors the internal ambient temperature T1 of the transmission device in real time, and communicates with the CPU processor through the AD analog-to-digital conversion unit. The CPU processor continuously executes the designed program to compare the internal ambient temperature T2 of the transmission device set by the host computer;

[0018] (3) When the temperature T1 is less than T2, the lower computer establishes a communication connection with the near-infrared heater and issues a command to trigger the near-infrared heater to work, heating the inside of the conveyor device so that the hopper temperature reaches T2; when the temperature T1 is greater than or equal to T2, the near-infrared heater stops working;

[0019] (4) When the hopper filled with materials moves to the top of the head assembly, the materials are thrown out under the action of centrifugal force and discharged from the discharge chute into the mixing equipment or finished product warehouse.

[0020] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the beneficial effects produced by the present invention are:

[0021] 1. The hot asphalt mixture conveying device of the present invention is composed of a head assembly, a bottom assembly and several middle section components, and is equipped with a circular conveying chain and multiple hoppers. The housings of the head assembly and the bottom assembly are respectively equipped with a feed chute and a discharge chute. The hopper moves in a circular motion with the conveying chain, takes materials from the feed chute, and when it reaches the top, the materials are thrown out by centrifugal force and discharged from the discharge chute. The invention can prevent the leakage of asphalt smoke and heat, which is not only energy-saving and environmentally friendly, but also reduces the structural height of the equipment, greatly reducing the construction cost of the mixing station. At the same time, the on-site layout method is more flexible and can adapt to the different site restrictions of customers.

[0022] 2. The hot asphalt mixture conveying device of the invention can fully utilize the heat of the exhaust gas discharged by the regeneration equipment to heat and insulate the internal hopper; on the other hand, it adopts a near-infrared heater for auxiliary heating, which has a fast heating speed, a simple structure and stable performance. The combination of the two can stably control the temperature of the material in the hopper at its ideal temperature, ensuring the quality of the hot asphalt mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 for Figure 1 A is an enlarged schematic diagram.

[0025] Figure 3 for Figure 1 A magnified schematic diagram of B.

[0026] Figure 4 Flow chart of the control method of the present invention. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0028] A hot asphalt mixture conveying device, referring to Figure 1, including a head assembly 10 provided with a driving mechanism 11, a bottom assembly 20 provided with a driven wheel assembly 21, and a plurality of middle section assemblies 30 installed between the head assembly 10 and the bottom assembly 20, wherein an annular conveying chain 12 is connected between the driving mechanism 11 and the driven wheel assembly 21, and the annular conveying chain 12 is specifically a double-plate chain, and a plurality of hoppers 13 are fixed at intervals on the outer side of the annular conveying chain 12, combined with Figure 2 A layer of stainless steel plate 131 is attached to the inner side of the hopper 13, which can greatly improve the smoothness of the inside of the hopper. The driving mechanism 11 and the driven wheel assembly 21 are commonly used mechanical components in the art, and will not be described in detail in this embodiment.

[0029] Reference Figure 1 The side of the bottom assembly 20 is provided with a feed chute 22 for allowing the hot asphalt mixture to slide onto the hopper 13, and the side of the head assembly 10 is also provided with a discharge chute 14 for discharging the hot asphalt mixture thrown out of the hopper 13. The feed chute 22 and the discharge chute 14 are both provided with a heat transfer oil insulation pipe 221, and the bottom arc plate of the bottom assembly 20 shell is also provided with a heat transfer oil insulation pipe 221.

[0030] Reference Figure 1 A temperature sensor 15 is provided in the shell of the head assembly 10. A hot flue gas inlet 23 is provided on the side of the shell of the bottom assembly 20, and the hot flue gas inlet 23 is connected to the exhaust gas discharge pipeline of the regeneration equipment; a hot flue gas outlet 16 is provided on the upper part of the shell of the head assembly 10, and the hot flue gas outlet 16 is connected to the original drying drum burner.

[0031] Reference Figure 1 A plurality of near-infrared heaters 31 are installed on the inner side of the shell of the middle component 30 corresponding to the rising end of the ring conveyor chain 12. In this embodiment, a near-infrared heating lamp is specifically shown. A plurality of bridges 32 corresponding to the near-infrared heaters 31 are also installed on the outer side of the shell of the middle component 30.

[0032] Reference Figure 1 and Figure 3 Closed-cell foam sealing strips 33 are provided on all the connecting flange surfaces between the middle components 30, between the middle components 30 and the head assembly 10, the bottom assembly 20, between the feed chute 22 and the bottom assembly 20, and between the discharge chute 14 and the head assembly 10 to ensure the overall sealing performance of the conveyor. Insulation cotton 34 is provided on the shell of the head assembly 10, the shell of the middle component 30, the shell of the bottom assembly 20, the feed chute 22, and the discharge chute 14 to improve the thermal insulation performance of the conveyor.

[0033] Reference Figure 1 and Figure 4The transmission device of the present invention further includes an upper computer 41 and a lower computer 42. The upper computer 41 is an industrial computer or a touch screen control terminal, which is used to input initial information and communicate with the lower computer, receive, transmit and display signals from the lower computer 42. The near-infrared heater 31 is connected to the lower computer 42 for communication. The lower computer 42 is a PLC controller, including a CPU processor 421 and an AD analog-to-digital conversion unit 422. The temperature sensor 15 is connected to the CPU processor 421 for communication through the AD analog-to-digital conversion unit 422.

[0034] Reference Figure 1 and Figure 4 The control method of the hot asphalt mixture conveying device of the present invention is as follows:

[0035] When the machine is started, the upper computer 41 receives the start-up input signal, and the lower computer 42 communicates with the upper computer 41 and controls the driving mechanism 11 of the head assembly 10 to operate, so that the hopper 13 moves in a circular motion with the circular conveyor chain 12, and continuously takes materials from the feed chute 22 of the bottom assembly 20. When the hopper 13 filled with materials moves to the top of the head assembly 10, the materials are thrown out under the action of centrifugal force and discharged from the discharge chute 14 into the mixing equipment or the finished product warehouse, so as to achieve the purpose of material transportation. The above materials specifically refer to hot asphalt mixture in this embodiment.

[0036] Due to the characteristics of hot asphalt mixture being relatively viscous and having relatively poor fluidity, anti-sticking measures are often required to prevent the hopper from sticking. Therefore, the conveying device of the present invention adds the following process during the conveying process:

[0037] (1) The hot flue gas of the regeneration equipment is connected to the interior of the conveying device through the hot flue gas inlet 23, and then climbs along the internal shell channel of the conveying device to the hot flue gas outlet 16 of the head assembly 10, and then connected to the burner end of the primary machine for secondary combustion treatment, so as to make full use of the heat of the hot flue gas so that the interior of the conveying device is in an environment with the same temperature as the hot flue gas.

[0038] (2) The temperature sensor 15 monitors the internal ambient temperature T1 of the transmission device in real time, and communicates with the CPU processor 421 through the AD analog-to-digital conversion unit 422. The CPU processor 421 continuously executes the designed program to compare the internal ambient temperature T2 of the transmission device set by the host computer 41;

[0039] (3) When the temperature T1 is less than T2, the lower computer 40 establishes a communication connection with the near-infrared heating lamp and issues a command to trigger the near-infrared heating lamp to heat the inside of the conveyor device so that the temperature of the hopper 13 reaches T2; when the temperature T1 is greater than or equal to T2, the near-infrared heating lamp stops working; based on the fast heating speed of the near-infrared heating lamp, it can not only quickly heat up the internal environment of the conveyor device, but also save energy.

[0040] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A hot asphalt mixture conveying device, characterized in that: It includes a head assembly with a driving mechanism, a bottom assembly with a passive wheel assembly, and a plurality of middle-section assemblies installed between the head assembly and the bottom assembly. An annular conveyor chain is connected between the driving mechanism and the passive wheel assembly. A plurality of hoppers are fixed at intervals on the outside of the annular conveyor chain. A feed chute for allowing hot asphalt mixture to slide onto the hopper is installed on the side of the bottom assembly. A discharge chute for discharging the hot asphalt mixture thrown out of the hopper is also installed on the side of the head assembly.

2. A hot asphalt mixture conveying device as claimed in claim 1, characterized in that: A temperature sensor is arranged in the shell of the head assembly.

3. A hot asphalt mixture conveying device as claimed in claim 2, characterized in that: A hot flue gas inlet is provided on the side of the shell assembled at the bottom, and the hot flue gas inlet is connected to the exhaust gas emission pipeline of the regeneration equipment; a hot flue gas exhaust port is provided on the upper part of the shell assembled at the head, and the hot flue gas exhaust port is connected to the original drying drum burner.

4. A hot asphalt mixture conveying device as claimed in claim 3, characterized in that: A plurality of near-infrared heaters are installed on the inner side of the shell of the middle component corresponding to the rising end of the ring-shaped conveyor chain.

5. A hot asphalt mixture conveying device as claimed in claim 4, characterized in that: A plurality of bridges corresponding to the near-infrared heaters are installed on the outer side of the shell of the middle component.

6. A hot asphalt mixture conveying device as claimed in claim 4, characterized in that: It also includes an upper computer and a lower computer, the upper computer is communicatively connected to the lower computer, the near-infrared heater is communicatively connected to the lower computer, the lower computer includes a CPU processor and an AD analog-to-digital conversion unit, and the temperature sensor is communicatively connected to the CPU processor via the AD analog-to-digital conversion unit.

7. A hot asphalt mixture conveying device as claimed in claim 1, characterized in that: Closed-cell foam sealing strips are provided on all connecting flange surfaces between the middle components, between the middle component and the head assembly, between the bottom assembly, between the feed chute and the bottom assembly, and between the discharge chute and the head assembly.

8. A hot asphalt mixture conveying device as claimed in claim 1, characterized in that: The shell of the head assembly, the shell of the middle assembly, the shell of the bottom assembly, the feed chute and the discharge chute are all provided with thermal insulation cotton.

9. A hot asphalt mixture conveying device as claimed in claim 1, characterized in that: A heat transfer oil insulation pipe is arranged on the bottom arc plate of the shell body assembled at the bottom; and a heat transfer oil insulation pipe is also arranged on the feed chute and the discharge chute.

10. The control method of a hot asphalt mixture conveying device according to claim 5, wherein: (1) The upper computer receives the start-up input signal, and the lower computer establishes a communication connection with the upper computer and controls the driving mechanism of the head assembly to operate, so that the hopper moves in a circular motion along the circular conveyor chain, and continuously takes materials from the feed chute assembled at the bottom, while passing the hot flue gas of the regeneration equipment into the conveying device; (2) The temperature sensor monitors the internal ambient temperature T1 of the transmission device in real time, and communicates with the CPU processor through the AD analog-to-digital conversion unit. The CPU processor continuously executes the designed program to compare the internal ambient temperature T2 of the transmission device set by the host computer; (3) When the temperature T1 is less than T2, the lower computer establishes a communication connection with the near-infrared heater and issues a command to trigger the near-infrared heater to work, heating the inside of the conveyor device so that the hopper temperature reaches T2; when the temperature T1 is greater than or equal to T2, the near-infrared heater stops working; (4) When the hopper filled with materials moves to the top of the head assembly, the materials are thrown out under the action of centrifugal force and discharged from the discharge chute into the mixing equipment or finished product warehouse.

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