Preparation method of asphalt with high viscosity and good stability

Abstract

The invention provides a preparation method of asphalt with high viscosity and good stability, and relates to the field of asphalt preparation. According to the high-viscosity good-stability asphalt and the preparation method thereof, mixing equipment comprises a spherical bin, a wavy groove is formed in the periphery of the inner wall of the spherical bin, a toothed belt is arranged on one side in the wavy groove, a limiting fork is hinged to one side of a rotating shaft sleeve, and the end, away from the rotating shaft sleeve, of the limiting fork is in a U shape; the ends, away from the rotating shaft sleeve, of the limiting forks are slidably connected with sliding sleeves, the sliding sleeves are rotationally connected with rotating rods, the ends, away from the sliding sleeves, of the rotating rods are rotationally connected with mounting bases, gears are rotationally arranged on one sides of the two mounting bases, the gears are correspondingly and fixedly connected with the rotating rods, and the gears are engaged with a toothed belt. And stirring rods are arranged on the outer sides of the rotating rods. The rotating rod and the stirring rod are meshed with each other, so that the asphalt and the auxiliary agent are fully mixed, and the asphalt with high viscosity and good stability is rapidly prepared.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt preparation, in particular to a preparation method of asphalt with high viscosity and good stability. BACKGROUND

[0002] Asphalt is a black-brown complex mixture composed of hydrocarbons and non-metallic derivatives of different molecular weights, is a kind of high-viscosity organic liquid, mostly exists in the form of liquid or semi-solid petroleum, the surface is black, and is soluble in carbon disulfide and carbon tetrachloride. High-viscosity asphalt is a kind of road material with improved adhesion and elasticity through special modification process, which is mainly used in bridge deck pavement, stress absorbing layer and other engineering scenes with high requirements on material performance.

[0003] In the preparation of existing asphalt, the asphalt at the end of oil refining and other additives are mixed to prepare high-viscosity and high-stability asphalt. Asphalt is a thermoplastic material without fixed melting point, and its state will gradually change from solid to viscoelastic and finally become liquid with the increase of temperature. When mixed with other additives, the mixing effect will be improved by cutting into small particles and then warming and mixing, so that it has the characteristics of high viscosity and high stability. The preparation efficiency of the existing preparation of high-viscosity and high-stability asphalt is low. SUMMARY

[0004] In view of the shortcomings of the prior art, the present application provides a preparation method of asphalt with high viscosity and good stability, which solves the problem of low preparation efficiency of high-viscosity and high-stability asphalt.

[0005] To achieve the above object, the present application is realized by the following technical scheme: a preparation method of asphalt with high viscosity and good stability, comprising the following steps: S1: After gasoline, kerosene and diesel are fractionated from crude oil, the remaining heavy oil enters the vacuum distillation to further fractionate distillate oil in a low-pressure environment to obtain asphalt raw material; S2: Pour the asphalt raw material of step S1 into a mixing device, and then pour mineral powder, crosslinking agent, modifier and stabilizer into it in proportion, and use the mixing device to warm and mix the materials; S3, test the viscosity and stability performance of the mixed asphalt in step S2 to obtain asphalt with high viscosity and good stability; The mixing device in S2 in the preparation method comprises a spherical bin, a wavy groove is arranged on the inner wall of the spherical bin, a tooth belt is arranged on one side of the wavy groove, a main rod is rotationally connected to the inside of the spherical bin, a rotating shaft sleeve is rotationally connected to the lower end of the main rod, a limiting fork is hingedly connected to one side of the rotating shaft sleeve, the end of the limiting fork away from the rotating shaft sleeve is U-shaped, a sliding sleeve is slidingly connected to the end of the limiting fork away from the rotating shaft sleeve, a rotating rod is rotationally connected to the sliding sleeve, a mounting seat is rotationally connected to the end of the rotating rod away from the sliding sleeve, a gear is rotationally arranged on one side of the two mounting seats, the gear is fixedly connected to the rotating rod, the gears are meshed with the tooth belt, and a stirring rod is arranged on the outer side of the rotating rod.

[0006] Preferably, the side surfaces of the two groups of stirring rods close to each other are attached to each other and engaged with each other.

[0007] Preferably, the inside of the rotating shaft sleeve is provided with a clamping groove, the bottom end of the main rod is slidingly provided with a wedge-shaped block, the wedge-shaped block and the main rod are fixed through a spring, one side of the wedge-shaped block is a slope, and one side of the wedge-shaped block and the clamping groove are engaged with each other.

[0008] Preferably, the limiting fork and the rotating shaft sleeve are hingedly connected in a vertical plane.

[0009] Preferably, the two mounting seats are movably connected through a linkage rod, and the mounting seats are slidingly and rotationally arranged in the wavy groove.

[0010] Preferably, the top of the main rod is rotationally arranged on the top of the spherical bin through a bearing, a motor is fixed to the top of the main rod, and the driving end of the motor and the top of the main rod are fixed to each other.

[0011] Preferably, a feeding port is formed in one side of the top of the spherical bin, and a discharging port is formed in the bottom of the spherical bin.

[0012] The application provides a preparation method of asphalt with good high-viscosity stability. The application puts asphalt blocks and reaction aids into the spherical bin through the feeding port, the motor drives the main rod to make the wedge block and the clamping groove engage, the rotating shaft sleeve drives the limiting fork to move the sliding sleeve, the sliding sleeve drives the rotating rod, the rotating rod makes the gear rotate on the toothed belt through the gear, at this time, the rotating rod driven by the gear can rotate on the sliding sleeve, the mounting seat in the wave-shaped groove gives the rotating rod a limit, the rotating rod can move up and down in the spherical bin in a wave-shaped three-dimensional manner around the wave-shaped groove, and the rotating rod also rotates when moving, the rotating rotating rod drives the two side-by-side stirring rods, the stirring rods form a shearing degree between each other, so that the blocky asphalt is stirred and sheared into small pieces at the same time, realizing uniform stirring and mixing of the asphalt and the aids, realizing sufficient stirring, improving the preparation efficiency of high-viscosity and high-stability asphalt, and discharging the prepared asphalt through the discharge port to obtain high-stability and high-viscosity asphalt. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a front view of the mixing device of the application; Figure 2 It is a front view of the mixing device of the application; Figure 3 It is a side view of the mounting seat of the mixing device of the application; Figure 4 It is a perspective view of the rotating rod and the stirring rod of the mixing device of the application; Figure 5 It is a perspective view of the mixing device of the application; Figure 2 It is an enlarged view of A in the mixing device of the application; Figure 6 It is an internal structure view of the rotating shaft sleeve of the mixing device of the application; Figure 7 It is a top view of the rotating shaft sleeve of the mixing device of the application; Figure 8 It is a flow chart of the asphalt preparation of the application.

[0014] 1, spherical bin; 2, feeding port; 3, motor; 4, discharge port; 5, main rod; 6, wave-shaped groove; 7, toothed belt; 8, rotating shaft sleeve; 9, limiting fork; 10, sliding sleeve; 11, rotating rod; 12, stirring rod; 13, mounting seat; 14, gear; 15, linkage rod; 16, spring; 17, wedge block; 18, clamping groove. DETAILED DESCRIPTION

[0015] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts, fall within the protection scope of the present application.

[0016] Embodiments: Referring to FIG. 1, Figure 8 The present embodiment provides a preparation method of asphalt with good high viscosity and stability, comprising the following steps: S1: After gasoline, kerosene and diesel are fractionated from crude oil, the remaining heavy oil enters a vacuum distillation to further fractionate distillate oil in a low-pressure environment, to obtain asphalt raw material; S2: The asphalt raw material of step S1 is poured into a mixing device, and then a proportion of mineral powder, crosslinking agent, modifier and stabilizer are poured into the mixing device, the material is heated and mixed by using the mixing device, the mineral powder is palygorskite, the crosslinking agent is p-hydroxybenzoic acid, the modifier is modified polypropylene, and the stabilizer is sodium carboxymethyl cellulose; S3: The mixed asphalt in step S2 is tested for viscosity and stability performance, to obtain asphalt with good high viscosity and stability; Referring to FIG. 1, Figures 1-8As shown in the preparation method, the mixing device in S2 comprises a spherical bin 1, a wave-shaped groove 6 is arranged on the inner wall of the spherical bin 1, a tooth belt 7 is arranged on one side of the wave-shaped groove 6, a main rod 5 is rotationally connected in the spherical bin 1, the main rod 5 can drive a limiting fork 9 through a rotating shaft sleeve 8, the limiting fork 9 keeps the relative rotation of a sliding sleeve 10 and a rotating rod 11, the lower end of the main rod 5 is rotationally connected with the rotating shaft sleeve 8, the limiting fork 9 is hinged on one side of the rotating shaft sleeve 8, the end of the limiting fork 9 away from the rotating shaft sleeve 8 is U-shaped, the end of the limiting fork 9 away from the rotating shaft sleeve 8 is slidingly connected with the sliding sleeve 10, the sliding sleeve 10 is rotationally connected with the rotating rod 11, the end of the rotating rod 11 away from the sliding sleeve 10 is rotationally connected with a mounting seat 13, a gear 14 is rotationally arranged on one side of the two mounting seats 13, the gear 14 is fixedly connected with the rotating rod 11, the gears 14 are meshed with the tooth belt 7, and stirring rods 12 are arranged on the outer sides of the rotating rods 11. The sides of the two groups of stirring rods 12 close to each other are in close contact and interlocked. The rotating shaft sleeve 8 is internally provided with a clamping groove 18, the bottom end of the main rod 5 is slidingly provided with a wedge-shaped block 17, the wedge-shaped block 17 and the main rod 5 are fixedly connected through a spring 16, one side of the wedge-shaped block 17 is a slope, and the wedge-shaped block 17 and one side of the clamping groove 18 are interlocked. When the main rod 5 rotates, the wedge-shaped block 17 and the clamping groove 18 are clamped to drive the rotating shaft sleeve 8, the rotating shaft sleeve 8 drives the limiting fork 9 to rotate, when the main rod 5 stops rotating, the rotating shaft sleeve 8 will continue to rotate due to the inertia of the rotating rod 11, at this time, the clamping groove 18 can press the slope side of the wedge-shaped block 17, the rotating shaft sleeve 8 continues to rotate, avoiding the sudden stop of the main rod 5 to cause friction vibration between the machines, protecting the motor 3, and the sides of the stirring rods 12 are in close contact, when rotating, the stirring rods 12 interlock to form a shearing force, which is used for cutting blocky asphalt to accelerate the mixing of the asphalt and the additives, and the limiting fork 9 and the rotating shaft sleeve 8 are hinged in a vertical plane. The two mounting seats 13 are movably connected through a linkage rod 15, and the mounting seats 13 slide and rotate in the wave-shaped groove 6. The top of the main rod 5 rotates on the top of the spherical bin 1 through a bearing, the top of the main rod 5 is fixedly connected with the motor 3, and the driving end of the motor 3 and the top of the main rod 5 are fixedly connected. A feeding port 2 is formed on one side of the top of the spherical bin 1, a discharging port 4 is formed on the bottom of the spherical bin 1, the inside of the spherical bin 1 is circular, and the mixed asphalt can smoothly flow out from the discharging port 4; When in use, the spherical bin 1 is externally provided with a heating temperature control structure for heating in the asphalt mixing process, asphalt blocks, asphalt particles, modified palygorskite, p-hydroxybenzoic acid, modified polypropylene and sodium carboxymethyl cellulose are put into the spherical bin 1 through the feeding port 2, the motor 3 drives the main rod 5 to make the wedge block 17 and the clamping groove 18 clamped, so that the rotating shaft sleeve 8 drives the limiting fork 9 to move the sliding sleeve 10, the sliding sleeve 10 drives the rotating rod 11, the rotating rod 11 drives the gear 14 to rotate on the gear belt 7, at this time, the rotating rod 11 driven by the gear 14 can rotate on the sliding sleeve 10, the mounting seat 13 is limited in the wave-shaped groove 6 to limit the rotating rod 11, the rotating rod 11 can move up and down in the spherical bin 1 in a wave-shaped three-dimensional manner around the wave-shaped groove 6, and the rotating rod 11 also rotates when moving, the rotating rod 11 drives the two mutually abutting stirring rods 12, the stirring rods 12 form a shearing degree between each other, so that the blocky asphalt is stirred and sheared into small pieces at the same time, realizing uniform stirring and mixing of the asphalt and the additives, realizing sufficient stirring, improving the preparation efficiency of high-viscosity and high-stability asphalt, and discharging the prepared asphalt through the discharge port 4 to obtain high-stability and high-viscosity asphalt.

[0017] In order to ensure the actual production efficiency of asphalt, the comparison test data of the stirring time of the device and the viscosity of asphalt are as follows: at a temperature of 135 DEG C, the viscosity of asphalt and the stirring time of the device are as follows:

[0018] From the above viscosity data, it can be seen that the shortest time of the device for heating and stirring asphalt to reach the maximum viscosity is 30 minutes, and the asphalt and the additives can be mixed to the best effect after 30 minutes of stirring, which is half of the time of the existing ordinary asphalt preparation and mixing device in the market, which is mainly due to the three-dimensional mixing and stirring of the device, which can shear the blocky asphalt raw materials during stirring, so that the blocky asphalt raw materials can quickly form a molten liquid, and the molten liquid can be mixed with the additives more quickly to form high-viscosity and stable asphalt raw materials.

[0019] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for preparing asphalt with high viscosity and good stability, characterized in that: It comprises the following steps: S1: after the crude oil is fractionated into gasoline, kerosene and diesel, the remaining heavy oil enters the vacuum distillation to further separate the distillate oil in a low pressure environment, and the asphalt raw material is obtained; S2: pour the asphalt raw material of step S1 into the mixing device, then pour the mineral powder, crosslinking agent, modifier and stabilizer into it in proportion, and use the mixing device to warm and mix the materials; S3: test the viscosity and stability of the mixed asphalt in step S2, and obtain the asphalt with high viscosity and good stability; The mixing device in the above preparation method S2 comprises a spherical bin (1), a wave-shaped groove (6) is arranged on the inner wall of the spherical bin (1), a tooth belt (7) is arranged on one side of the wave-shaped groove (6), a main rod (5) is rotatably connected in the spherical bin (1), a rotating shaft sleeve (8) is rotatably connected to the lower end of the main rod (5), a limiting fork (9) is hingedly connected to one side of the rotating shaft sleeve (8), the end of the limiting fork (9) away from the rotating shaft sleeve (8) is U-shaped, a sliding sleeve (10) is slidably connected to the end of the limiting fork (9) away from the rotating shaft sleeve (8), a rotating rod (11) is rotatably connected to the sliding sleeve (10), an installation seat (13) is rotatably connected to the end of the rotating rod (11) away from the sliding sleeve (10), a gear (14) is rotatably arranged on one side of the installation seat (13), the gear (14) is fixedly connected with the rotating rod (11), the gears (14) are meshed with the tooth belt (7), and stirring rods (12) are arranged on the outer sides of the rotating rods (11).

2. The method for preparing asphalt with high viscosity and good stability according to claim 1, characterized in that: The sides of the two groups of stirring rods (12) close to each other are in close contact and engage with each other.

3. The method for preparing asphalt with high viscosity and good stability according to claim 1, characterized in that: The rotating shaft sleeve (8) is provided with a clamping groove (18) in the inside, the bottom end of the main rod (5) is slidably provided with a wedge-shaped block (17), the wedge-shaped block (17) and the main rod (5) are fixed by a spring (16), one side of the wedge-shaped block (17) is a slope, and the wedge-shaped block (17) and one side of the clamping groove (18) engage with each other.

4. The method for preparing asphalt with high viscosity and good stability according to claim 1, characterized in that: The limiting fork (9) and the rotating shaft sleeve (8) are hingedly connected as vertical faces.

5. The method as claimed in claim 1, wherein the bitumen is prepared with high viscosity and good stability. The installation seats (13) are movably connected by a linkage rod (15) between the two installation seats (13), and the installation seats (13) are slidably rotatable in the wave-shaped groove (6).

6. The method for preparing asphalt with high viscosity and good stability according to claim 1, characterized in that: The top of the main rod (5) is rotatably connected to the top of the spherical bin (1) through a bearing, the motor (3) is fixed to the top of the main rod (5), and the driving end of the motor (3) and the top of the main rod (5) are fixed to each other.

7. The process for preparing bitumen with high viscosity stability as claimed in claim 1 wherein the process further comprises the step of: A feeding port (2) is formed on one side of the top of the spherical bin (1), and a discharging port (4) is formed on the bottom of the spherical bin (1).

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