Accurate metering and feeding equipment for high-modulus asphalt modifier

Abstract

The utility model relates to the field of asphalt production equipment, in particular to accurate metering and feeding equipment for high-modulus asphalt modifiers, which comprises a mixing cylinder and an end cover, the end cover is buckled at the top end of the mixing cylinder, a communicating pipe is inserted into the top end of the end cover, a storage tank is fixedly arranged at the top end of the communicating pipe, and a first inner container is fixedly arranged in the middle of the storage tank. A first electromagnetic valve is mounted at the bottom end of the storage tank, and a clamping groove is formed in the side wall of the communicating pipe; compared with the traditional accurate metering and feeding equipment for the asphalt modifier, the metering and filling convenience of the modifier is improved through the cooperation of the communicating pipe, the storage tank, the first inner container, the first electromagnetic valve and the metering cylinder, and the flowability of the modifier is improved through the cooperation of the second motor and the second stirring rod; through cooperation of the end cover, the air cylinder, the metering cylinder and the discharging port, the metering cylinder can be driven to move downwards, so that a modifier is discharged into the mixing cylinder through the discharging port, and the convenience of adding the modifier is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of asphalt production equipment especially relates to a high modulus asphalt modifier's accurate metering and putting equipment. BACKGROUND

[0002] High modulus asphalt modifier is an additive for improving asphalt performance and improving asphalt mixture modulus, wherein polymer, fiber and other modifiers form network structure or enhance skeleton in asphalt, limit the movement of asphalt molecules, so that asphalt mixture can better transmit stress and reduce deformation, inorganic filler fills the gap, optimizes the gradation of mixture, improves its compactness and enhances the ability to resist external force, and high modulus asphalt needs to use accurate metering and putting equipment to improve the accuracy of asphalt production ratio during production.

[0003] The existing high modulus asphalt modifier usually includes styrene-butadiene-styrene block copolymer (SBS), and because the SBS modifier has certain viscosity, it takes time and effort to meter and put the modifier, thereby affecting the efficiency of the modifier putting. SUMMARY

[0004] In order to overcome the problem that the existing high modulus asphalt modifier usually includes styrene-butadiene-styrene block copolymer (SBS), and because the SBS modifier has certain viscosity, it takes time and effort to meter and put the modifier, thereby affecting the efficiency of the modifier putting.

[0005] The technical scheme of the utility model is: a high modulus asphalt modifier's accurate metering and putting equipment, including the mixing cylinder and the end cover, the end cover is buckled on the top end of the mixing cylinder, the top end of the end cover is inserted with the communicating pipe, the top end of the communicating pipe is fixedly provided with the storage tank, the middle of the storage tank is fixedly provided with the first inner bag, the bottom end of the storage tank is installed with the first electromagnetic valve, the sidewall of the communicating pipe is provided with the clamping groove, the middle of the communicating pipe is movably connected with the metering cylinder, the surface of the end cover close to the clamping groove is fixedly provided with the air cylinder, the sidewall of the metering cylinder is provided with the discharge port, the bottom end of the metering cylinder is fixedly provided with the second motor, and the output end of the second motor is fixedly provided with the second stirring rod.

[0006] Further, the outer dimension of the metering cylinder is matched with the inner dimension of the communicating pipe, the discharge port is communicated with the inner bottom of the metering cylinder, the second stirring rod is matched with the inner dimension of the metering cylinder in a spiral shape, and the stability of the second stirring rod rotation is improved.

[0007] Further, the sidewall of the metering cylinder close to the clamping groove is fixedly provided with the connecting plate, the inner dimension of the clamping groove is matched with the outer dimension of the connecting plate, the output end of the air cylinder is fixedly arranged at the bottom end of the connecting plate, and the stability of the metering cylinder movement is improved.

[0008] Further, the sealing ring is clamped on the side wall of the metering cylinder near the bottom of the discharge port, and the sealing ring is annular, which improves the sealing performance of the bottom end of the metering cylinder.

[0009] Further, the communication pipe is connected with the first inner container, and the outer surface of the first inner container is wound with a second heating coil.

[0010] Further, the second inner container is fixedly arranged on the inner bottom of the mixing cylinder, and the outer surface of the second inner container is wound with a first heating coil.

[0011] Further, the discharge pipe is inserted into the bottom end of the mixing cylinder, the discharge pipe is communicated with the second inner container, and the second electromagnetic valve is arranged at the bottom end of the discharge pipe.

[0012] Further, the first motor is fixedly arranged in the middle of the end cover, the feed hopper is inserted into the top end of the end cover near the first motor, and the output end of the first motor is fixedly arranged with the first stirring rod.

[0013] The beneficial effects of the utility model are as follows:

[0014] Compared with the traditional asphalt modifier precision metering and feeding equipment, the communication pipe, the storage tank, the first inner container, the first electromagnetic valve and the metering cylinder are matched to improve the convenience of modifier metering and filling, the second motor and the second stirring rod are matched to improve the flowability of the modifier, the end cover, the cylinder, the metering cylinder and the discharge port are matched, the metering cylinder can be driven to move downward, so that the modifier is discharged into the mixing cylinder through the discharge port, thereby improving the convenience of modifier addition; secondly, the metering cylinder is annularly arranged on the outer surface of the metering cylinder, thereby improving the sealing performance of the metering cylinder sliding in the communication pipe. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The asphalt modifier precision metering and feeding equipment is shown as a whole structure schematic view;

[0016] Figure 2 The mixing cylinder structure schematic view is shown as a whole structure schematic view;

[0017] Figure 3 The mixing cylinder structure schematic view is shown as a whole structure schematic view;

[0018] Figure 4 The storage tank structure schematic view is shown as a whole structure schematic view;

[0019] Figure 5 The metering cylinder structure schematic view is shown as a whole structure schematic view.

[0020] Explanation of reference signs: 1, mixing cylinder; 2, end cover; 3, communication pipe; 4, storage tank; 5, cylinder; 6, first motor; 7, feeding hopper; 8, discharge pipe; 9, first inner bag; 10, first electromagnetic valve; 11, clamping groove; 12, measuring cylinder; 13, second electromagnetic valve; 14, discharge port; 15, second inner bag; 16, first heating ring; 17, first stirring rod; 18, second heating ring; 19, second motor; 20, second stirring rod; 21, sealing ring. DETAILED DESCRIPTION

[0021] The utility model will be further explained in connection with the drawings and examples.

[0022] Among the existing discovered implementable technologies, the following is described.

[0023] High modulus asphalt modifier is a kind of material that can improve the modulus of asphalt mixture and enhance its road performance, and asphalt and modifier are in a mutually dependent and interactive relationship, and the addition of modifier can significantly improve the performance of asphalt to meet the needs of different engineering applications.

[0024] Improve high-temperature performance: some modifiers, such as SBS in polymers and APP (random polypropylene), can form a spatial network structure at high temperatures, limiting the thermal motion of asphalt molecules, thereby increasing the softening point of asphalt and reducing its viscous flow at high temperatures, reducing the occurrence of high-temperature diseases such as rutting, for example, the high-temperature stability of SBS modified asphalt is significantly higher than that of ordinary asphalt, and it can better maintain the flatness of the pavement in heavy traffic and high-temperature environments.

[0025] Improve low-temperature performance: modifiers such as SBS and rubber powder can reduce the brittle point of asphalt and increase its flexibility and ductility at low temperatures. This makes asphalt less likely to crack in cold environments, improving the low-temperature crack resistance of the pavement, for example, in cold northern regions, the use of SBS modified asphalt can effectively reduce the occurrence of winter pavement cracks.

[0026] Enhance adhesion: certain modifiers, such as amine and silane surfactants, can improve the adhesion between asphalt and aggregate. They can be adsorbed on the interface between asphalt and aggregate, reducing the interfacial energy and enhancing the physical and chemical interaction between the two, thereby improving the water stability of asphalt mixture and preventing the separation of aggregate and asphalt due to water intrusion.

[0027] Improve fatigue resistance: fiber modifiers (such as lignin fiber and polyester fiber) and polymer modifiers can enhance the toughness and cohesion of asphalt, making asphalt mixture more resistant to fatigue cracking under repeated loads, for example, on roads that bear traffic loads for a long time, asphalt pavement with fiber modifiers can withstand more load cycles without fatigue cracking.

[0028] The modifiers mainly include the following types: polymer: styrene-butadiene-styrene block copolymer (SBS), which is a common thermoplastic elastomer with good elasticity, fatigue resistance and low temperature performance. It can form a three-dimensional network structure in asphalt, effectively improving the viscosity and elasticity of asphalt, and enhancing the high temperature stability and low temperature crack resistance of asphalt mixture; limited lignin fiber: a kind of natural organic fiber with good oil absorption and dispersion; in asphalt mixture, lignin fiber can absorb light oil in asphalt, increase the viscosity of asphalt, improve the internal friction resistance and stability of the mixture, and also improve the high temperature deformation resistance and low temperature crack resistance of the mixture; resin, coumarone-indene resin, has good viscosity and thermal stability, after adding to asphalt, it can increase the softening point of asphalt, increase the viscosity and toughness of asphalt, and improve the high temperature stability and anti-aging performance of asphalt mixture.

[0029] Direct feeding method: for small batch production or laboratory research, artificial direct feeding of high modulus asphalt modifier into the stirring pot, a certain amount of asphalt is heated to the specified temperature, then the modifier is weighed according to the design proportion, slowly and uniformly poured into the asphalt, and the stirring equipment is started to stir, this method is suitable for the case that the amount of modifier is small and the requirement for adding precision is not high.

[0030] Premixing method: first, mix the high modulus asphalt modifier with a small amount of base asphalt in a container, stir uniformly, then pour a large amount of hot asphalt into the container and continue stirring, make sure that the modifier is fully dispersed in the base asphalt to form a uniform mixture, this method can improve the dispersion of the modifier in asphalt, and is suitable for some modifiers that are not easy to disperse in asphalt, such as fiber modifiers.

[0031] Pneumatic conveying addition: use the airflow generated by compressed air to transport high modulus asphalt modifier into the asphalt mixing equipment. The modifier enters the pneumatic conveying pipeline from the silo and is transported to the designated position under the action of airflow. The pneumatic conveying system is usually equipped with a metering device. This method is suitable for light and fluid modifiers, such as lignin fiber.

[0032] Plunger pump addition: for liquid high modulus asphalt modifier, such as solution of some resin modifiers, plunger pump can be used for addition. The plunger pump draws the modifier from the storage tank and injects it into the hot asphalt according to the set flow rate and pressure. By adjusting the stroke and frequency of the plunger pump, the amount of modifier added can be accurately controlled.

[0033] The existing high modulus asphalt modifier usually includes styrene-butadiene-styrene block copolymer (SBS), because the SBS modifier has certain viscosity, resulting in the modification of the modifier metering time-consuming and laborious, thereby affecting the efficiency of the modifier feeding.

[0034] Embodiment 1

[0035] Please refer to Figures 1-5 A high modulus asphalt modifier precision metering feeding device, including a mixing cylinder 1 and an end cover 2, the mixing cylinder 1 is used to heat the asphalt mixture, the end cover 2 is buckled on the top end of the mixing cylinder 1, the top end of the end cover 2 is inserted with a communication pipe 3, the top end of the communication pipe 3 is fixedly provided with a storage tank 4, the middle of the storage tank 4 is fixedly provided with a first inner bag 9 for loading SBS modifier, the communication pipe 3 and the first inner bag 9 are communicated, the bottom end of the storage tank 4 is installed with a first electromagnetic valve 10 for controlling the communication of the communication pipe 3 and the first inner bag 9, the sidewall of the communication pipe 3 is provided with a clamping groove 11, the middle of the communication pipe 3 is movably connected with a metering cylinder 12, the metering cylinder 12 is used to measure and fill the modifier, the external size of the metering cylinder 12 is matched with the internal size of the communication pipe 3, the surface of the end cover 2 close to the clamping groove 11 is fixedly provided with an air cylinder 5, the sidewall of the metering cylinder 12 is provided with a discharge port 14, the discharge port 14 is communicated with the inner bottom of the metering cylinder 12, the bottom end of the metering cylinder 12 is fixedly provided with a second motor 19, the output end of the second motor 19 is fixedly provided with a second stirring rod 20, the second stirring rod 20 is spiral and matched with the internal size of the metering cylinder 12, the stability of the second stirring rod 20 rotation is improved, the sidewall of the metering cylinder 12 close to the clamping groove 11 is fixedly provided with a connecting plate, the internal size of the clamping groove 11 is matched with the external size of the connecting plate, the output end of the air cylinder 5 is fixedly provided at the bottom end of the connecting plate, the stability of the metering cylinder 12 movement is improved.

[0036] Please refer to Figures 1-3 The inner bottom of the mixing cylinder 1 is fixedly provided with a second inner bag 15, the outer surface of the second inner bag 15 is wound with a first heating coil 16, the bottom end of the mixing cylinder 1 is inserted with a discharge pipe 8, the discharge pipe 8 is communicated with the second inner bag 15, the bottom end of the discharge pipe 8 is installed with a second electromagnetic valve 13, the middle of the end cover 2 is fixedly provided with a first motor 6, the top end of the end cover 2 close to the first motor 6 is inserted with a feeding hopper 7, the output end of the first motor 6 is fixedly provided with a first stirring rod 17.

[0037] Please refer to Figures 4-5 The outer surface of the first inner bag 9 is wound with a second heating coil 18, the sidewall of the metering cylinder 12 close to the discharge port 14 below is clamped with a sealing ring 21, the sealing ring 21 is annular, the sealing property of the bottom end of the metering cylinder 12 is improved.

[0038] In the precise metering device of the asphalt modifier, the operator first connects the power supply, then sends the asphalt raw material into the second inner container 15 through the feeding hopper 7, starts the first heating ring 16 to heat the second inner container 15 to improve the flowability of the asphalt, starts the first electromagnetic valve 10 to make the first inner container 9 and the communication pipe 3 communicate, so that the modifier falls into the metering cylinder 12 under the action of gravity, starts the second motor 19 to drive the second stirring rod 20 to rotate, so as to improve the filling density of the modifier in the metering cylinder 12, thereby improving the access precision, closes the first electromagnetic valve 10, then starts the air cylinder 5 to drive the metering cylinder 12 to vertically slide in the communication pipe 3, so as to expose the discharge port 14, the second stirring rod 20 rotates to extrude the modifier to vertically move downward, so that the modifier is injected into the second inner container 15 from the discharge port 14 to mix with the asphalt raw material, and the first motor 6 is started to drive the first stirring rod 17 to rotate, so as to accelerate the mixing efficiency of the modifier and the asphalt, thereby improving the elastic modulus of the asphalt.

[0039] It is also considered that the modifier has flowability and may leak from the inner side wall of the communication pipe 3, the clamping sealing ring 21 is provided, the sealing ring 21 has elasticity, and the sealing property of the metering cylinder 12 sliding in the communication pipe 3 is improved, and the second heating ring 18 is turned on to heat the modifier and improve the flowability of the modifier.

[0040] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A precise metering and dispensing device for high-modulus asphalt modifier, characterized in that, It includes a mixing cylinder (1) and an end cap (2): the end cap (2) is fastened to the top of the mixing cylinder (1), a connecting pipe (3) is inserted into the top of the end cap (2), a storage tank (4) is fixed at the top of the connecting pipe (3), a first inner liner (9) is fixed in the middle of the storage tank (4), a first solenoid valve (10) is installed at the bottom of the storage tank (4), a slot (11) is opened on the side wall of the connecting pipe (3), a metering cylinder (12) is movably connected in the middle of the connecting pipe (3), a cylinder (5) is fixed on the surface of the end cap (2) near the slot (11), a discharge port (14) is opened on the side wall of the metering cylinder (12), a second motor (19) is fixed at the bottom of the metering cylinder (12), and a second stirring rod (20) is fixed at the output end of the second motor (19).

2. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: The external dimensions of the metering cylinder (12) are adapted to the internal dimensions of the connecting pipe (3), the discharge port (14) is connected to the inner bottom of the metering cylinder (12), and the second stirring rod (20) is spiral-shaped and adapted to the internal dimensions of the metering cylinder (12).

3. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: A connecting plate is fixed on the side wall of the measuring cylinder (12) near the slot (11). The internal dimensions of the slot (11) are compatible with the external dimensions of the connecting plate. The output end of the cylinder (5) is fixed at the bottom of the connection.

4. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: A sealing ring (21) is snapped onto the side wall of the metering cylinder (12) below the discharge port (14). The sealing ring (21) is in the shape of a ring.

5. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: The connecting pipe (3) is connected to the first inner liner (9), and the outer surface of the first inner liner (9) is wrapped with a second heating coil (18).

6. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: The bottom of the mixing tank (1) is fixed with a second inner liner (15), and the outer surface of the second inner liner (15) is wrapped with a first heating coil (16).

7. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 6, characterized in that: A discharge pipe (8) is inserted into the bottom end of the mixing cylinder (1). The discharge pipe (8) is connected to the second inner liner (15). A second solenoid valve (13) is installed at the bottom end of the discharge pipe (8).

8. The precise metering and dispensing device for a high-modulus asphalt modifier according to claim 1, characterized in that: A first motor (6) is fixed in the middle of the end cap (2), and a feed hopper (7) is inserted into the top of the end cap (2) near the first motor (6). A first stirring rod (17) is fixed at the output end of the first motor (6).

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