A pressure-loss stirring kettle and a method for producing foamed asphalt using the same

Abstract

The invention discloses a pressure-loss stirring kettle, which belongs to the technical field of asphalt production, and comprises a stirring kettle, a weighing platform and a foaming main pipeline. The stirring kettle comprises a kettle body, a motor, a stirring shaft, stirring blades and a weighing support. The motor is arranged on the top of the kettle body, the stirring shaft is arranged inside the kettle body, and the stirring shaft is connected to the main shaft of the motor. The stirring blades are arranged on the bottom of the stirring shaft. An asphalt inlet pipe, a water inlet pipe, a compressed gas inlet pipe and an additive inlet pipe are also arranged on the top of the kettle body, and gate valves are arranged on the asphalt inlet pipe, the water inlet pipe, the compressed gas inlet pipe and the additive inlet pipe. A foamed asphalt outlet valve is also arranged at the bottom of the kettle body, so as to solve the problem that the foaming method of foamed asphalt is complicated in foaming operation and leads to too low foaming efficiency. Liquid-liquid mixing is more uniform, the half-life of foamed asphalt is prolonged, and the stability of foamed asphalt is increased.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt production, in particular to a pressure-loss stirring kettle and a method for making foamed asphalt using the same. Background Art

[0002] Foamed asphalt refers to adding a certain amount of water to high-temperature asphalt. The water vaporizes rapidly when heated and then mixes with the asphalt to form explosive foam, which greatly increases the surface area of ​​the asphalt, greatly expands the volume by several to dozens of times, and reduces the viscosity. Then, the asphalt foam bursts and only a small amount of microscopic bubbles remain in it. This asphalt that expands into foam is called foamed asphalt.

[0003] The foam warm mix asphalt mixture recycling technology refers to the process of mixing the waste asphalt pavement materials after milling with new materials after designing their dosage, adding foamed asphalt through special foaming equipment, paving with a paver after mechanical mixing, and finally compacting with a compactor. The foam warm mix recycled asphalt mixture technology is used for the recycling of waste asphalt mixtures, which can effectively reduce the aging of asphalt, reduce the heating temperature during recycling, and reasonably use waste asphalt mixtures, fully reflecting the advantages of waste utilization, energy conservation and emission reduction, and green environmental protection.

[0004] In the prior art, asphalt is foamed using foaming equipment to form foamed asphalt. However, the current foaming operation of foamed asphalt is too rough, gas-liquid mixing is difficult, and the process is uncontrollable, resulting in low foaming efficiency and easy breakage of bubbles. Summary of the invention

[0005] The purpose of the present invention is to provide a pressure-loss stirring kettle and a method for making foamed asphalt using the same, so as to solve the technical problem that the foaming operation of the foamed asphalt in the prior art is complicated, resulting in low foaming efficiency.

[0006] The present invention provides a pressure-loss-type stirring kettle, comprising a stirring kettle, a weighing platform and a foaming main pipeline, wherein the stirring kettle comprises a kettle body, a motor, a stirring shaft, stirring blades and a weighing support, wherein the weighing support device is arranged on the outside of the kettle body, the motor is arranged on the top of the kettle body, the stirring shaft is arranged inside the kettle body, and the stirring shaft is connected to the main shaft of the motor, the stirring blades are arranged at the bottom of the stirring shaft, and an asphalt inlet pipe, a water inlet pipe, a compressed gas inlet pipe and an additive inlet pipe are also arranged on the top of the kettle body, and gate valves are arranged on the asphalt inlet pipe, the water inlet pipe, the compressed gas inlet pipe and the additive inlet pipe, and a foamed asphalt outlet valve is also arranged at the bottom of the kettle body.

[0007] Furthermore, the weighing platform includes a weighing bracket and a weighing scale. The weighing scales are respectively arranged at the bottom of the weighing support, and the bottom of each weighing scale is connected to a weighing bracket. The weighing scale is used to measure the weight of the added material when making foamed asphalt, which can achieve the effect of quantitative feeding and control the accuracy.

[0008] Furthermore, the foaming main pipeline is arranged at the bottom of the asphalt foam outlet valve, and a plurality of nozzles are also arranged at the bottom of the foaming main pipeline. The water and asphalt mixture fluid released from the mixing tank 1 forms foamed asphalt in the foaming main pipeline 3 and the nozzle 301 during the process of decompression.

[0009] A method for preparing foamed asphalt using a pressure-depleted stirring kettle comprises the following steps:

[0010] S1: Adding asphalt and additives into the stirred tank.

[0011] S2: The weight of asphalt and additives is measured by gravimetric scale to control the accuracy.

[0012] S3: Start the motor to drive the stirring blades through the stirring shaft to stir the asphalt and the additive so that the asphalt and the additive are fully mixed.

[0013] S4: Inject compressed gas to pressurize the stirred tank to a specified pressure.

[0014] S5: Inject a certain amount of water.

[0015] S6: Stir the fluid in the stirring tank evenly through the stirring blades.

[0016] S7: Open the foamed asphalt outlet valve. The fluid released from the mixing kettle enters the foaming main pipeline and forms foamed asphalt during the decompression process and enters the mixing tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] First, the mixing kettle is provided with a compressed gas inlet pipe, and the bottom of the mixing kettle is provided with a foamed asphalt outlet valve. By adding asphalt by pressurization and decompression, one asphalt pump can be reduced, and the cost is greatly reduced;

[0019] Second, the entire pipeline is sealed with a gate valve, and no asphalt fume is discharged;

[0020] Third, liquid-liquid mixing is more uniform than gas-liquid mixing, which greatly improves the foaming effect and prolongs the half-life of foamed asphalt.

[0021] Fourthly, using this method, stirring under pressure, the pressure in the container can always keep the water in liquid state, the asphalt and water are fully mixed by stirring, and the fluid is ejected from the outlet by pressure, and foamed asphalt is generated in an instant, which can make the foaming effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention from a first angle;

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the second angle of the present invention.

[0026] Reference numerals:

[0027] Agitating kettle 1, a weighing platform 2, a foaming main pipeline 3, a kettle body 101, a motor 102, a stirring shaft 103, a stirring blade 104, a weighing support 105, an asphalt inlet pipe 106, a water inlet pipe 107, a compressed gas inlet pipe 108, an additive inlet pipe 109, a gate valve 110, a weighing bracket 201, a weighing scale 202, and a spray pipe 301. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Combine the following Figures 1 to 3 As shown, the embodiment of the present invention provides a pressure-loss stirring kettle, including a stirring kettle 1, a weighing platform 2 and a foaming main pipeline 3, the stirring kettle 1 includes a kettle body 101, a motor 102, a stirring shaft 103, a stirring blade 104 and a weighing support 105, the weighing support 201 is arranged on the outside of the kettle body 101, the weighing support 201 is used to connect the weighing platform 2, the motor 102 is arranged on the top of the kettle body 101, the stirring shaft 103 is arranged inside the kettle body 101, and the stirring shaft 103 is connected to the main shaft of the motor 102, and the stirring blade 104 is arranged at the bottom of the stirring shaft 103. When the motor 102 is working, the stirring blade 104 can be driven to rotate by the stirring shaft 103, so that In order to achieve the stirring effect, an asphalt inlet pipe 106, a water inlet pipe 107, a compressed air inlet pipe 108 and an additive inlet pipe 109 are further provided on the top of the kettle body 101. The asphalt inlet pipe 106 is used to add asphalt, the water inlet pipe 107 is used to add water, the compressed gas inlet pipe 108 is used to add compressed gas, and the additive inlet pipe 109 is used to add additives. Gate valves 110 are provided on the asphalt inlet pipe 106, the water inlet pipe 107, the compressed air inlet pipe 108 and the additive inlet pipe 109 to ensure the sealing of the inside of the kettle body 101. A foamed asphalt outlet valve is also provided at the bottom of the kettle body 101, and the foamed asphalt outlet valve is used to release the processed foamed asphalt fluid.

[0034] Preferably, the weighing platform 2 includes a weighing bracket 201 and a weighing scale 202, and the weighing scales 202 are respectively arranged at the bottom of the weighing support 105, and the bottom of each weighing scale is connected to a weighing bracket 201. The weighing scale 202 is used to measure the weight of the added material when making foamed asphalt, which can achieve the effect of quantitative feeding and control the accuracy.

[0035] Preferably, the foaming main pipe 3 is arranged at the bottom of the asphalt foam outlet valve, and a plurality of nozzles 301 are also provided at the bottom of the foaming main pipe 3. The water and asphalt mixture fluid released from the mixing tank 1 forms foamed asphalt in the foaming main pipe 3 and the nozzles 301 during the process of decompression.

[0036] A method for preparing foamed asphalt using a pressure-depleted stirring kettle comprises the following steps:

[0037] S1: Add asphalt and additives into the stirred tank 1.

[0038] S2: The weight of the asphalt and additives is measured by a weighing scale 202 to control the accuracy.

[0039] S3: The motor 102 is started to drive the stirring blade 104 through the stirring shaft 103 to stir the asphalt and the additive so that the asphalt and the additive are fully mixed.

[0040] S4: Inject compressed gas to pressurize the stirred tank 1 to a specified pressure.

[0041] S5: Inject a certain amount of water.

[0042] S6: The fluid in the stirring tank 1 is stirred uniformly by the stirring blade 104 .

[0043] S7: Open the foamed asphalt outlet valve, and the fluid released from the mixing kettle 1 enters the foaming main pipeline 3 to form foamed asphalt during the decompression process and enters the mixing tank.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for producing foamed asphalt using a pressure-depleted stirred tank, characterized in that: A pressure-loss stirring kettle comprises a stirring kettle (1), a weighing platform (2) and a foaming main pipeline (3); the stirring kettle (1) comprises a kettle body (101), a motor (102), a stirring shaft (103), a stirring blade (104) and a weighing support (105); the weighing platform (2) comprises a weighing bracket (201) and a weighing scale (202); the weighing scale (202) is arranged at the bottom of the weighing support (105), and the bottom of each weighing scale (202) is connected to a weighing bracket (201); the weighing bracket (201) is arranged on the outside of the kettle body (101), the motor (102) is arranged on the top of the kettle body (101), the stirring shaft (103) is arranged inside the kettle body (101), and the stirring The shaft (103) is connected to the main shaft of the motor (102), the stirring blade (104) is arranged at the bottom of the stirring shaft (103), the top of the kettle body (101) is also provided with an asphalt inlet pipe (106), a water inlet pipe (107), a compressed gas inlet pipe (108) and an additive inlet pipe (109), the asphalt inlet pipe (106), the water inlet pipe (107), the compressed gas inlet pipe (108) and the additive inlet pipe (109) are all provided with gate valves (110), the bottom of the kettle body (101) is also provided with a foamed asphalt outlet valve, the spray main pipeline (3) is arranged at the bottom of the foamed asphalt outlet valve, and the bottom of the spray main pipeline (3) is also provided with a plurality of spray pipes (301), comprising the following steps: S1: adding asphalt and additives into the stirred tank (1); S2: measuring the weight of asphalt and additives by a weighing scale (202) to control the accuracy; S3: starting the motor (102) to drive the stirring blade (104) via the stirring shaft (103) to stir the asphalt and the additive so that the asphalt and the additive are fully mixed; S4: injecting compressed gas to pressurize the stirred tank (1) to a specified pressure; S5: inject a certain amount of water; S6: stirring the fluid in the stirring tank (1) uniformly by means of the stirring blade (104); S7: The foamed asphalt outlet valve is opened, and the fluid released from the mixing kettle (1) enters the foaming main pipeline (3) to form foamed asphalt during the decompression process and enters the mixing tank.

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