Preparation Method of Direct-Injection Granular Colored Asphalt Mixture

Abstract

The present invention relates to the technical field of colored asphalt, and discloses a preparation method for directly-injected granular colored asphalt mixture, which includes the following preparation steps: 1), using hot aggregate to be placed in a mixing pot for stirring and pot washing; 2), placing the aggregate into the mixing pot and heating it to a set temperature; 3), putting colored asphalt particles into the mixing pot, and then adding SBS modified asphalt; 4), mixing the aggregate and granular colored asphalt in the mixing pot at the set temperature and stirring for a set time to form a mixture without uncolored materials; preheating and cleaning the mixing pot in advance, and then heating the mixing pot, which saves heating time and improves cleaning efficiency. Stirring the aggregate at the set temperature for the set time to form a mixture without uncolored materials. The preparation process is simple and easy to control, solving the problems that the aggregate stays in the mixing pot for too long and cools down, easily resulting in uncolored mixture and the complex preparation process.

Description

Technical Field

[0001] This invention patent relates to the technical field of colored asphalt, specifically to a preparation method of directly-fed granular colored asphalt mixture. Background Art

[0002] Select an asphalt mixing plant with an appropriate output, preferably an intermittent type within the range of 500 - 2000 type (i.e., the weight of each batch of mixture is 500 - 2000 kg); since the granular colored asphalt is directly fed externally, each ton of material requires more than 60 kg of asphalt granules, especially the manual feeding speed is relatively slow. To ensure sufficient feeding time and mixing time;

[0003] If the mixing equipment is too large, it will increase the feeding time and mixing time, resulting in the aggregate staying in the mixing pot for too long and cooling down, which is likely to produce variegated mixture, and the preparation process is complex. Summary of the Invention

[0004] The purpose of this invention is to provide a preparation method of directly-fed granular colored asphalt mixture, aiming to solve the problems in the prior art that the aggregate stays in the mixing pot for too long and cools down, which is likely to produce variegated mixture, and the preparation process is complex.

[0005] This invention is implemented as follows. The preparation method of directly-fed granular colored asphalt mixture includes the following preparation steps:

[0006] 1), Use hot aggregate to place in the mixing pot for stirring and cleaning the pot;

[0007] 2), Place the aggregate into the mixing pot and heat it to the set temperature;

[0008] 3), Put the colored asphalt granules into the mixing pot, and then add SBS modified asphalt;

[0009] 4), Mix the aggregate and granular colored asphalt in the mixing pot at the set temperature for the set time to form a mixture without variegated material.

[0010] Further, in the preparation step 1), use the hot aggregate to place in the mixing pot for dry mixing and cleaning for 2 - 3 minutes.

[0011] Further, in the preparation step 2), the set temperature should be controlled at 190°C - 210°C.

[0012] Further, in the preparation step 3), the added SBS modified asphalt should be delayed to the set time, and the set time is greater than 40 seconds.

[0013] Further, in the preparation step 3), after the aggregate is automatically weighed and sprayed with SBS modified asphalt, wet mixing is carried out for 20 seconds.

[0014] Further, in the preparation step 4), the stirring pot is stirred to a set time and a set temperature. The set time is greater than or equal to 60 seconds, and the set temperature is controlled at 170 - 210 °C.

[0015] Further, an electric heating wire is wound around the outer periphery of the stirring pot, and the stirring pot is heated by energizing the electric heating wire; there is a stirring cavity in the stirring pot that is longitudinal and open at the top. A stirring shaft is arranged longitudinally in the stirring cavity, and a plurality of blades are arranged on the outer periphery of the stirring shaft. The plurality of blades are respectively arranged in a staggered manner along the circumferential and axial directions of the stirring shaft; an internal cavity is arranged in the stirring shaft, and the top of the internal cavity penetrates the outer side wall of the stirring shaft to form a feed port. An air inlet hole communicating with an air pressure pipe is arranged at the top of the internal cavity;

[0016] A horizontally rotating rotating shaft is arranged in the middle of the outer periphery of the stirring shaft. The rotating shaft has an extension section extending towards the bottom of the stirring cavity, and the extension section and the rotating shaft have a mutually communicating flow cavity; a plurality of circular hole-shaped openings are arranged on the outer side wall of the extension section, and the circular hole-shaped openings are communicated with the internal cavity through the flow cavity;

[0017] In the preparation step 4), the SBS modified asphalt is fed into the internal cavity through the feed port, and then the air pressure from the outside is blown into the internal cavity by using the air inlet hole. The SBS modified asphalt flows to the plurality of circular hole-shaped openings along with the air pressure and is evenly sprayed on the aggregate.

[0018] Further, a spiral groove is arranged on the inner side wall of the flow cavity. The top of the spiral groove extends towards the inner side wall of the internal cavity to communicate, and the bottom of the spiral groove extends towards the circular hole-shaped opening to communicate; a stepped platform protruding towards the inside is arranged on the inner side wall of the spiral groove, and the stepped platforms are arranged at intervals along the direction of the spiral groove.

[0019] Further, a one-way valve piece covering the feed port is arranged on the inner side wall of the internal cavity. The top of the one-way valve piece is connected to the inner side wall of the internal cavity through a hinge. A fitting ring facing the feed port is arranged on the one-way valve piece, and the outer periphery of the fitting ring abuts against the inner side wall of the feed port to form a sealing structure;

[0020] When the air pressure in the air pressure pipe flows towards the internal cavity, the air pressure will squeeze and block the one-way valve piece towards the feed port.

[0021] Further, the extension section extends downward along the inner side wall of the stirring cavity from top to bottom, and there is a rotating gap between the extension section and the inner side wall of the stirring cavity; the top of the extension section is fixedly connected to the rotating shaft, and there is a spaced arrangement between the bottom of the extension section and the bottom of the stirring cavity.

[0022] Compared with the prior art, the method for preparing the direct-injection granular colored asphalt mixture provided by the present invention pre-heats and cleans the mixing pot in advance, and then heats the mixing pot, saving the heating time and improving the cleaning efficiency. The aggregate is stirred at a set temperature for a set time to form a mixture without uncolored materials. The preparation process is simple and easy to control, solving the problems that the aggregate stays in the mixing pot for too long and cools down, easily resulting in uncolored mixture, and the complex preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic flow chart of the method for preparing the direct-injection granular colored asphalt mixture provided by the present invention;

[0024] Figure 2 is a front view sectional structure schematic diagram of the mixing pot provided by the present invention;

[0025] Figure 3 is a front view sectional structure schematic diagram of the stirring shaft provided by the present invention;

[0026] Figure 4 is the present invention Figure 3 The enlarged schematic diagram of A in.

[0027] In the figure: mixing pot 100, electric heating wire 200, stirring shaft 300, blade 400, rotating shaft 500, extension section 600, feed inlet 301, air inlet hole 302, check valve piece 303, flow cavity 601, circular hole-shaped opening 602, spiral groove 603, stepped platform 604. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0030] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is 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. Therefore, the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] Refer toFigures 1-4 As shown, it is a preferred embodiment provided by the present invention.

[0032] A method for preparing direct-injection granular colored asphalt mixture, comprising the following preparation steps:

[0033] 1), Use hot aggregate placed in the mixing pot 100 for stirring and pot washing;

[0034] 2), Place the aggregate into the mixing pot 100 and heat it to the set temperature;

[0035] 3), Put the colored asphalt particles into the mixing pot 100, and then add SBS modified asphalt;

[0036] 4), Mix the aggregate and granular colored asphalt in the mixing pot 100 at the set temperature for the set time to form a mixture without white and flower materials.

[0037] For the above-provided method for preparing direct-injection granular colored asphalt mixture, preheat and clean the mixing pot 100 in advance, and then heat the mixing pot 100, which saves heating time and improves cleaning efficiency. Stir the aggregate at the set temperature for the set time to form a mixture without white and flower materials. This preparation process is simple and easy to control, solving the problems that the aggregate stays in the mixing pot 100 for too long and cools down, resulting in white and flower mixture easily, and the preparation process is complex.

[0038] In preparation step 1), use hot aggregate placed in the mixing pot 100 for dry mixing and stirring for 2 - 3 minutes. In this way, it is ensured that the mixing pot 100, the material transportation hopper truck and the storage bin are clean without debris after being washed by the hot aggregate, and the mixing pot 100 can be preheated in advance.

[0039] In preparation step 2), the set temperature should be controlled at 190°C - 210°C. In this embodiment, adjust the throttle and air damper of the combustion well, control the stable aggregate temperature and then carry out continuous production to avoid unnecessary economic losses.

[0040] In preparation step 3), the added SBS modified asphalt should be delayed to the set time, and the set time is greater than 40 seconds.

[0041] In this embodiment, the added SBS modified asphalt should be delayed for more than 40 seconds to allow the injected granular colored asphalt to have enough time to disperse and evenly adhere to the surface of the stone material; when the dried aggregate is put into the mixing pot 100, it should be completed in the shortest time; ensure that the asphalt particles have enough time to soften.

[0042] In preparation step 3), after the aggregate is automatically weighed and the SBS modified asphalt is sprayed, wet mix for 20 seconds.

[0043] In this embodiment, after automatic weighing and spraying of the modified asphalt, wet mixing is carried out for 20 seconds; the mixing time for a pot of mixture should not be less than 60 seconds, and it is appropriate that there is no variegated material in the mixture. If the time is short, the colored asphalt particles are not completely dispersed, and it is easy to form agglomerated colored asphalt slurry, and the asphalt film on the aggregate will be uneven in thickness, and there will be oil bleeding or uneven color distribution on the road surface.

[0044] In preparation step 4), the mixing pot 100 is stirred to the set time and set temperature. The set time is greater than or equal to 60 seconds, and the set temperature is controlled at 170 - 210 °C.

[0045] In this embodiment, when the temperature is low, variegated material appears, the mixture has no luster and is not bright, and the color is relatively dull; when the temperature is high, the mixture emits blue smoke, and as the temperature and time increase, the color of the mixture will become darker (such as bright red turning brown).

[0046] The outer periphery of the mixing pot 100 is wound with an electric heating wire 200, and the electric heating wire 200 heats the mixing pot 100 by being energized; there is a mixing cavity in the mixing pot 100 that is longitudinal and open at the top. A stirring shaft 300 arranged longitudinally is provided in the mixing cavity. A plurality of blades 400 are provided on the outer periphery of the stirring shaft 300, and the plurality of blades 400 are respectively arranged in a staggered manner along the circumferential and axial directions of the stirring shaft 300; an internal cavity is provided in the stirring shaft 300, and the top of the internal cavity penetrates the outer side wall of the stirring shaft 300 to form a feed port 301. An air inlet hole 302 communicating with an air pressure pipe is provided at the top of the internal cavity;

[0047] A horizontally rotating rotating shaft 500 is provided in the middle of the outer periphery of the stirring shaft 300. The rotating shaft 500 has an extension section 600 extending towards the bottom of the mixing cavity. The extension section 600 and the rotating shaft 500 have a mutually communicating flow cavity 601; a plurality of circular hole-shaped openings 602 are provided on the outer side wall of the extension section 600, and the circular hole-shaped openings 602 communicate with the internal cavity through the flow cavity 601;

[0048] In preparation step 4), the SBS modified asphalt is sent into the internal cavity through the feed port 301, and then the external air pressure is blown into the internal cavity by using the air inlet hole 302. The SBS modified asphalt flows to the plurality of circular hole-shaped openings 602 along with the air pressure and is evenly sprayed on the aggregate.

[0049] In this embodiment, the SBS modified asphalt is sent into the internal cavity of the stirring shaft 300 through the feed port 301, and then the external air pressure is blown into the internal cavity through the air inlet hole 302 by using an external air pressure pump. The SBS modified asphalt flows to the plurality of circular hole-shaped openings 602 along with the air pressure and is evenly sprayed on the aggregate. When the stirring shaft 300 rotates reciprocally, the input of the external air pressure pump is normal.

[0050] The inner wall of the flow chamber 601 is provided with a spiral groove 603. The top of the spiral groove 603 extends towards the inner wall of the inner chamber until they are connected. The bottom of the spiral groove 603 extends towards the circular hole-shaped opening 602 until they are connected. The inner wall of the spiral groove 603 has a stepped platform 604 protruding towards the inside, and the stepped platforms 604 are arranged at intervals along the direction of the spiral groove 603.

[0051] In this embodiment, the flow chamber 601 uses the spiral groove 603 to increase the flow distance of the SBS modified asphalt. And through the spiral flow structure, when the SBS modified asphalt flows, the SBS modified asphalt itself will also mix and flow. The spiral groove 603 then uses the stepped platform 604 to improve the flow mixing effect of the SBS modified asphalt.

[0052] The inner wall of the inner chamber has a one-way valve plate 303 covering the feed port 301. The top of the one-way valve plate 303 is connected to the inner wall of the inner chamber by a hinge. The one-way valve plate 303 is provided with a fitting ring facing the feed port 301. The outer periphery of the fitting ring abuts against the inner wall of the feed port 301 to form a sealing structure.

[0053] When the air pressure in the air pressure pipe flows towards the inner chamber, the air pressure will squeeze and block the one-way valve plate 303 towards the feed port 301.

[0054] In this embodiment, it can be avoided that after the external air pressure pump blows the external air pressure into the inner chamber through the air inlet hole 302, the air pressure flows out along the feed port 301, thereby affecting the effect of the air pressure driving the SBS modified asphalt to spray out the extension section 600.

[0055] The extension section 600 is arranged to extend downward along the inner wall of the stirring chamber, and there is a rotational gap between the extension section 600 and the inner wall of the stirring chamber. The top of the extension section 600 is fixedly connected to the rotating shaft 500, and there is a spaced arrangement between the bottom of the extension section 600 and the bottom of the stirring chamber.

[0056] In this embodiment, it is avoided that there is frictional resistance between the bottom of the stirring chamber and the bottom of the extension section 600, thereby affecting the rotation of the extension section 600 following the rotating shaft 500.

[0057] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. Preparation method of direct-injection granular colored asphalt mixture, characterized in that, It includes the following preparation steps: 1), Use hot aggregate placed in a mixing pot to stir and wash the pot; 2), Place the aggregate into the mixing pot and heat it to the set temperature; 3), Put colored asphalt particles into the mixing pot, and then add SBS modified asphalt; 4), Mix the aggregate and granular colored asphalt in the mixing pot at the set temperature for the set time to form a mixture without uncolored materials; The outer periphery of the mixing pot is wound with heating wires, and the heating wires heat the mixing pot by being energized; there is a longitudinal mixing cavity with an open top in the mixing pot, a longitudinally arranged mixing shaft is provided in the mixing cavity, and a plurality of blades are provided on the outer periphery of the mixing shaft, and the plurality of blades are arranged in a staggered manner along the circumferential and axial directions of the mixing shaft respectively; an internal cavity is provided in the mixing shaft, the top of the internal cavity penetrates the outer side wall of the mixing shaft to form a feed port, and an air inlet hole communicating with a pneumatic tube is provided at the top of the internal cavity; A horizontally rotating rotating shaft is provided in the middle of the outer periphery of the mixing shaft, the rotating shaft has an extension section extending towards the bottom of the mixing cavity, and the extension section and the rotating shaft have a mutually communicating flow cavity; a plurality of circular hole-shaped openings are provided on the outer side wall of the extension section, and the circular hole-shaped openings communicate with the internal cavity through the flow cavity; In the preparation step 4), the SBS modified asphalt is sent into the internal cavity through the feed port, and then the air pressure from the outside is blown into the internal cavity by using the air inlet hole, and the SBS modified asphalt flows to the plurality of circular hole-shaped openings along with the air pressure and is evenly sprayed on the aggregate; A spiral groove is provided on the inner side wall of the flow cavity, the top of the spiral groove extends towards the inner side wall of the internal cavity to communicate, and the bottom of the spiral groove extends towards the circular hole-shaped opening to communicate; a stepped platform protruding towards the inside is provided on the inner side wall of the spiral groove, and the stepped platforms are arranged at intervals along the direction of the spiral groove.

2. The preparation method of the direct-injection granular colored asphalt mixture according to claim 1, characterized in that, In the preparation step 1), use the hot aggregate to dry mix and wash in the mixing pot for 2 - 3 minutes.

3. The preparation method of the direct-injection granular colored asphalt mixture according to claim 1, characterized in that, In the preparation step 2), the set temperature should be controlled at 190°C - 210°C.

4. The preparation method of the directly-injected granular colored asphalt mixture according to claim 1, characterized in that, In the preparation step 3), the added SBS modified asphalt should be delayed to the set time, and the set time is greater than 40 seconds.

5. The preparation method of the direct-injection granular colored asphalt mixture according to claim 4, wherein In the preparation step 3), after the aggregate is automatically weighed and the SBS modified asphalt is sprayed, it is wet mixed for 20 seconds.

6. The preparation method of the direct-injection granular colored asphalt mixture according to any one of claims 1 to 5, characterized in that In the preparation step 4), the mixing pot is stirred to the set time and set temperature, the set time is greater than or equal to 60 seconds, and the set temperature is controlled at 170 - 210°C.

7. The preparation method of the direct-injection granular colored asphalt mixture according to any one of claims 1 to 5, characterized in that, A one-way valve piece covering the feed port is provided on the inner side wall of the internal cavity, the top of the one-way valve piece is hinged to the inner side wall of the internal cavity, a fitting ring facing the feed port is provided on the one-way valve piece, and the outer periphery of the fitting ring abuts against the inner side wall of the feed port to form a sealing structure; When the air pressure in the pneumatic tube flows towards the internal cavity, the air pressure will squeeze and block the one-way valve piece towards the feed port.

8. The preparation method of the direct-injection granular colored asphalt mixture according to any one of claims 1 to 5, characterized in that The extension section extends downward along the inner side wall of the mixing cavity from top to bottom, and there is a rotation gap between the extension section and the inner side wall of the mixing cavity; the top of the extension section is fixedly connected to the rotating shaft, and the bottom of the extension section is spaced from the bottom of the mixing cavity.

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