Process for the preparation of elastomer modified bitumen

Abstract

The present application relates to the field of asphalt preparation, more particularly to a preparation process of elastomer modified asphalt. The process comprises the following steps: step one: preparing melted asphalt; step two: preparing rubber threads processed from tires and cutting them into fixed lengths; step three: adding the fixed-length rubber threads into the melted asphalt; step four: thoroughly mixing the asphalt and the rubber threads and discharging. The preparation process of elastomer modified asphalt also uses a preparation device of elastomer modified asphalt, which comprises a mixing barrel, a moving assembly walking along the upper side of the mixing barrel, a feeding assembly for feeding rubber threads arranged on the moving assembly, and a cutting assembly for cutting rubber threads arranged on the moving assembly. The device has the advantage of being able to cut rubber threads recycled from tires and add them into asphalt preparation to enhance the elasticity of the asphalt.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of asphalt preparation, and more particularly to an elastomer modified asphalt preparation process. BACKGROUND

[0002] Asphalt is a black-brown complex mixture composed of hydrocarbons and non-metallic derivatives of different molecular weights, which is a kind of high-viscosity organic liquid, usually exists in the form of liquid or semi-solid petroleum, and the surface is black, which is soluble in carbon disulfide and carbon tetrachloride. Asphalt is a waterproof, moisture-proof and corrosion-resistant organic cementing material. The prior art cannot process recycled rubber tires into rubber threads, and then add them to asphalt to participate in the preparation of asphalt and enhance the elasticity of asphalt. SUMMARY

[0003] The purpose of the present application is to provide an elastomer modified asphalt preparation process, which has the advantages of being able to cut the recycled rubber threads of tires and add them to the preparation of asphalt to enhance the elasticity of asphalt.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] An elastomer modified asphalt preparation process, which comprises the following steps:

[0006] Step 1: prepare molten asphalt;

[0007] Step 2: prepare rubber threads processed from tires and cut to a fixed length;

[0008] Step 3: add rubber threads of a fixed length to the molten asphalt;

[0009] Step 4: mix the asphalt and rubber threads thoroughly and discharge.

[0010] The elastomer modified asphalt preparation process also uses an elastomer modified asphalt preparation device, which comprises a mixing barrel, a movement assembly running along the upper eave of the mixing barrel, a rubber thread feeding assembly provided on the movement assembly, and a rubber thread cutting assembly provided on the movement assembly.

[0011] The movement assembly comprises a running frame sliding on the upper eave of the mixing barrel, and a running gear rotating on the running frame, and the mixing barrel upper eave is provided with a gear ring, and the gear ring and the running gear are in meshing transmission. BRIEF DESCRIPTION OF DRAWINGS

[0012] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0013] Figure 1 is a processing flow chart for preparing asphalt;

[0014] Figure 2is a structural schematic diagram of cutting rubber thread;

[0015] Figure 3 is a structural schematic diagram of transporting rubber thread;

[0016] Figure 4 is Figure 3 a structural schematic diagram of another direction of the structure shown;

[0017] Figure 5 is Figure 2 a partial enlarged view of the structure shown;

[0018] Figure 6 is a structural schematic diagram of adding asphalt;

[0019] Figure 7 is a structural schematic diagram of stirring asphalt;

[0020] Figure 8 is a parts diagram of stirring asphalt;

[0021] Figure 9 is a structural schematic diagram of multi-directional stirring of asphalt;

[0022] Figure 10 is a structural schematic diagram of driving Figure 9 the structure shown to rotate. DETAILED DESCRIPTION

[0023] Referring to Figure 1 , the process flow of preparing elastomer modified asphalt is described in detail:

[0024] An elastomer modified asphalt preparation process, the process comprising the following steps:

[0025] Step 1: Prepare molten asphalt;

[0026] Step 2: Prepare rubber thread processed from tires and perform fixed-length cutting;

[0027] Step 3: Add fixed-length rubber thread to the molten asphalt;

[0028] Step 4: Mix the asphalt and rubber thread thoroughly and perform discharging.

[0029] In combination with the above embodiments, the following functions can also be achieved:

[0030] Referring to Figure 2 , the implementation process of preparing elastomer modified asphalt is described in detail:

[0031] The elastomer modified asphalt preparation process also uses an elastomer modified asphalt preparation device, which comprises a mixing barrel 11 for loading melted asphalt and mixing and stirring the asphalt, a moving assembly is arranged on the upper edge of the mixing barrel 11 and can move along the upper edge of the mixing barrel 11, a feeding assembly is arranged on the moving assembly and can transport rubber threads to provide rubber threads into the mixing barrel 11, and a cutting assembly is arranged on the moving assembly and can cut the rubber threads transported by the feeding assembly. The rubber threads are cut to a fixed length and then fed into the mixing barrel 11. The moving assembly moves along the upper edge of the mixing barrel 11 and realizes rotation around the axis of the mixing barrel 11 to add rubber threads into the mixing barrel 11 from different positions. The rubber threads are mixed with the asphalt, the elasticity of the asphalt is enhanced by the addition of the rubber threads, and the elastomer modified asphalt is prepared.

[0032] In combination with the above embodiments, the following functions can also be achieved.

[0033] Reference Figure 2 、 3 and 4, the implementation process of the moving assembly moving along the upper edge of the mixing barrel is described in detail.

[0034] The moving assembly comprises a walking frame 21 slidingly connected to the upper edge of the mixing barrel 11, a walking gear 22 rotatably connected to the walking frame 21, and a gear ring 12 fixedly connected to the upper edge of the mixing barrel 11. The gear ring 12 and the walking gear 22 are in meshing transmission. The walking gear 22 is fixedly connected to the output shaft of a speed reducer motor I. The speed reducer motor I is fixedly connected to the walking frame 21. Starting the speed reducer motor I, the output shaft of the speed reducer motor I drives the walking gear 22 to rotate. The walking gear 22 moves along the gear ring 12 and rotates around the axis of the mixing barrel 11. In this way, the rubber threads are continuously added into the mixing barrel 11 while rotating around the axis of the mixing barrel 11. Through the mixing of the rubber threads and the asphalt, the elasticity of the asphalt is increased, and the recycling of the rubber tires is also achieved.

[0035] In combination with the above embodiments, the following functions can also be achieved.

[0036] Reference Figure 3 and 4 , the implementation process of transporting rubber threads is described in detail.

[0037] The feeding assembly comprises a middle shaft 23 fixedly connected to the walking frame 21, the middle shaft 23 is used for placing a disc for winding rubber threads, and the rubber threads can be continuously provided through the rotation of the disc; the walking frame 21 is fixedly connected with two limiting shafts 24, the rubber threads pass through the two limiting shafts 24, and the two limiting shafts 24 limit and guide the rubber threads, so that the rubber threads at any position are guided by the two limiting shafts 24 and then output from the same position; the walking frame 21 is fixedly connected with a feeding pipe 25, the rubber threads pass through the feeding pipe 25, so that the rubber threads are vertically transported downwards; one side of the feeding pipe 25 is provided with a through hole, the rubber threads enter the through hole and then output from the lower end of the feeding pipe 25, and a round corner is arranged on the through hole to prevent the rubber threads from being cut off; the walking frame 21 is rotatably connected with two direction-changing wheels 26, the two direction-changing wheels 26 are in meshing transmission, the two direction-changing wheels 26 are fixedly connected with feeding wheels 27, the lower end of the walking frame 21 is fixedly connected with a guide pipe 28, the rubber threads pass through the guide pipe 28 and then pass out from the lower end thereof, and one of the direction-changing wheels 26 is fixedly connected to the output shaft of a speed reducer II, the speed reducer II is fixedly connected to the walking frame 21; when the speed reducer II is started, the speed reducer II drives the direction-changing wheel 26 fixedly connected thereto to rotate, the direction-changing wheel 26 drives the other direction-changing wheel 26 to rotate in meshing transmission, the two direction-changing wheels 26 drive the two feeding wheels 27 to rotate, the two feeding wheels 27 rotate in opposite directions, and the two feeding wheels 27 jointly transport the rubber threads downwards; and the reliable transportation of the rubber threads is realized through the extrusion of the two feeding wheels 27.

[0038] In combination with the above embodiment, the following functions can also be realized.

[0039] Reference Figure 4 The implementation process of reliably transporting the rubber threads is described in detail.

[0040] The two feeding wheels 27 are each provided with a plurality of grooves, the friction between the two feeding wheels 27 and the rubber threads is enhanced through the grooves, and the reliable transportation of the rubber threads is realized through the enhanced friction.

[0041] In combination with the above embodiment, the following functions can also be realized.

[0042] Reference Figure 4 The implementation process of cutting the rubber threads is described in detail.

[0043] The cutting assembly comprises a cutting knife holder 29 rotatably connected to the lower end of the walking frame 21, the cutting knife holder 29 is fixedly connected with a cutting driven wheel 31, when the cutting driven wheel 31 is driven to rotate, the cutting driven wheel 31 drives the cutting knife holder 29 to rotate, the cutting knife holder 29 cuts the rubber threads output from the lower end of the guide pipe 28, the rubber threads are cut off, the cut rubber threads fall into the mixing barrel 11 at the lower end, and the feeding is completed.

[0044] In combination with the above embodiment, the following functions can also be realized.

[0045] Referring to Figure 4 and 5 , the implementation process of driving the cutting knife holder to cut the rubber thread is described in detail:

[0046] The walking gear ring 13 is fixedly connected in the mixing barrel 11, the transmission gear shaft 32 is rotatably connected on the walking frame 21, the transmission gear shaft 32 and the walking gear ring 13 are in meshing transmission, the cutting driven wheel 31 and the transmission gear shaft 32 are driven by the toothed belt, when the walking frame 21 rotates, the walking frame 21 drives the transmission gear shaft 32 to walk, the transmission gear shaft 32 rotates around its own axis while walking along the walking gear ring 13, the transmission gear shaft 32 drives the cutting driven wheel 31 to rotate through the toothed belt, the cutting driven wheel 31 drives the cutting knife holder 29 to rotate, thereby realizing the cutting of the rubber thread.

[0047] In combination with the above embodiment, the following functions can also be realized:

[0048] Referring to Figure 6 , the implementation process of adding the asphalt evenly layer by layer into the mixing barrel is described in detail:

[0049] The support 41 is fixedly connected on the mixing barrel 11, the feeding pipe 42 is rotatably connected on the support 41, the asphalt is added into the mixing barrel 11 through the feeding pipe 42, the upper end of the feeding pipe 42 is vertical, the lower end is inclined, so that the asphalt entering from the upper end of the feeding pipe 42 is guided through the inclined part of the lower end of the feeding pipe 42, and then is uniformly fed through the multiple branch pipes arranged on the feeding pipe 42 below the inclined part, the driven wheel 43 is fixedly connected on the feeding pipe 42, the driving wheel 44 is drivingly connected on the support 41, the driving wheel 44 and the driven wheel 43 are in meshing transmission, the driving wheel 44 is fixedly connected on the output shaft of the speed reducer motor III, the speed reducer motor III is fixedly connected on the support 41, the speed reducer motor III is started to drive the driving wheel 44 to rotate, the driving wheel 44 drives the driven wheel 43 to rotate, the driven wheel 43 drives the feeding pipe 42 to rotate, thereby realizing the uniform feeding of the asphalt in the feeding pipe 42 into the mixing barrel 11 below, the asphalt is laid layer by layer in the mixing barrel 11, thereby realizing the uniform feeding of the rubber thread and the asphalt into the mixing barrel 11, and the mixing of the asphalt and the rubber thread is more uniform.

[0050] In combination with the above embodiment, the following functions can also be realized:

[0051] Referring to Figure 7 and 8 , the implementation process of mixing the asphalt is described in detail:

[0052] The stirring shaft 51 is fixedly connected with a plurality of mixing plates 52, and the bottom end of the stirring shaft 51 is fixedly connected with an impeller 53. When the discharge pipe 42 rotates to drive the stirring shaft 51 to rotate, the stirring shaft 51 drives the plurality of mixing plates 52 to rotate to realize the mixing of the rubber wire and the asphalt. The stirring shaft 51 drives the impeller 53 at the lower end to rotate. The impeller 53 is a spiral impeller. When the impeller 53 rotates to push the asphalt upward, the asphalt can be mixed in the upward and downward directions. At this time, the direction of rotation of the impeller 53 is defined as the forward direction. When the processing of the asphalt is completed and the discharge is required, the asphalt has strong adhesion and is not easy to flow. At this time, the impeller 53 is driven to rotate in the reverse direction, and the impeller 53 starts to push the asphalt for discharge. Through the pushing of the impeller 53, the discharge of the asphalt is more thorough, and the discharge speed is faster.

[0053] In combination with the above-mentioned embodiments, the following functions can also be realized;

[0054] Reference Figure 9 and 10 , the implementation process of enhancing the mixing effect of the asphalt is described in detail:

[0055] A plurality of inclined plates 61 are rotatably connected to the stirring shaft 51, and a plurality of cone pulleys 62 are fixedly connected to the inclined plates 61. An upper wheel 71 is rotatably connected to the stirring shaft 51, and a lower wheel 72 is fixedly connected to the upper wheel 71. The plurality of cone pulleys 62 are in friction transmission with the lower wheel 72. An auxiliary wheel 73 is rotatably connected to the discharge pipe 42, and the auxiliary wheel 73 is in meshing transmission with the upper wheel 71. The auxiliary wheel 73 is fixedly connected to a speed reducer motor IV, and the speed reducer motor IV is fixedly connected to the discharge pipe 42. When the speed reducer motor IV is started, the speed reducer motor IV drives the auxiliary wheel 73 to rotate, the auxiliary wheel 73 is in meshing transmission with the upper wheel 71, the upper wheel 71 drives the lower wheel 72 to rotate, the lower wheel 72 drives the plurality of cone pulleys 62 to rotate in friction transmission, the plurality of cone pulleys 62 drive the plurality of inclined plates 61 to rotate, and the plurality of inclined plates 61 are mixed and stirred at the bent corner at the lower end of the mixing barrel 11 to realize the mixing without dead angle in the mixing barrel 11 and enhance the mixing effect of the asphalt.

Claims

1. An elastomer modified bitumen production process characterized by: The process comprises the following steps: Step 1: preparing molten asphalt; Step 2: preparing rubber threads processed from tires and cutting them into fixed lengths; Step 3: adding the fixed-length rubber threads into the molten asphalt; Step 4: thoroughly mixing the asphalt and rubber threads and discharging; also using an elastomer-modified asphalt preparation device, which comprises a mixing barrel (11), a moving assembly running along the upper edge of the mixing barrel (11), a feeding assembly for feeding rubber threads arranged on the moving assembly, and a cutting assembly for cutting rubber threads arranged on the moving assembly, the moving assembly comprising a running frame (21) sliding on the upper edge of the mixing barrel (11), and a running gear (22) rotating on the running frame (21), the upper edge of the mixing barrel (11) being provided with a gear ring (12), the gear ring (12) and the running gear (22) being in meshing transmission, the feeding assembly comprising a middle shaft (23) fixed to the running frame (21), two limiting shafts (24) for limiting rubber threads fixed to the running frame (21), a feeding pipe (25) fixed to the running frame (21), and two deflection wheels (26) rotating on the running frame (21), the two deflection wheels (26) being in meshing transmission, each of the two deflection wheels (26) being fixed with a feeding wheel (27), the lower end of the running frame (21) being fixed with a guide pipe (28), each of the two feeding wheels (27) being provided with a groove, the cutting assembly comprising a cutting tool holder (29) rotating at the lower end of the running frame (21), and a cutting driven wheel (31) fixed to the cutting tool holder (29), the device further comprising a running gear ring (13) fixed in the mixing barrel (11), and a transmission gear shaft (32) rotating on the running frame (21), the transmission gear shaft (32) and the running gear ring (13) being in meshing transmission, the cutting driven wheel (31) and the transmission gear shaft (32) being in transmission through a toothed belt, the device further comprising a bracket (41) fixed to the mixing barrel (11), a discharging pipe (42) rotating on the bracket (41), a driven wheel (43) fixed to the discharging pipe (42), a driving wheel (44) driving the driven wheel (43) to rotate, the driving wheel (44) rotating on the bracket (41), the device further comprising a stirring shaft (51) fixed to the discharging pipe (42), a plurality of mixing plates (52) fixed to the stirring shaft (51), an impeller (53) fixed to the bottom end of the stirring shaft (51), the device further comprising a plurality of inclined plates (61) rotating on the stirring shaft (51), each of the plurality of inclined plates (61) being fixed with a bevel gear (62), an upper wheel (71) rotating on the stirring shaft (51), a lower wheel (72) fixed to the upper wheel (71), an auxiliary wheel (73) driving the upper wheel (71) to rotate, the auxiliary wheel (73) rotating on the discharging pipe (42), each of the plurality of bevel gears (62) being in friction transmission with the lower wheel (72).

Images