A super-low temperature cold patch asphalt mixture rapid stirring device

Abstract

The utility model discloses a kind of ultra-low temperature cold patch asphalt mixture rapid stirring device, it is related to mixing stirring technical field.By two gear drive two mixed helix synchronous rotation, can carry out efficient stirring to raw materials in mixing cylinder, simultaneously, by the circulation backflow structure of stepper motor two, conveying helix, stepper motor one, backflow helix and circulation backflow cylinder composition, can after preliminary stirring after mixture is retransported back mixing cylinder and is stirred secondly, so that two mixed helix synchronous rotation, form bidirectional shearing stirring effect, this bidirectional stirring structure can be to the asphalt cementing material with the rigid agglomerated aggregate particle of increased viscosity under ultra-low temperature sufficient shearing, knead, effectively break the agglomeration state between particle, make asphalt cementing material evenly wrap aggregate particle, avoid the problem of mixing uneven caused by traditional unidirectional structure only unidirectional push, and then improve the mixing quality of ultra-low temperature cold patch asphalt mixture.

Description

Technical Field

[0001] This utility model relates to the field of mixing technology, and in particular to a rapid mixing device for ultra-low temperature cold-mix asphalt mixture. Background Technology

[0002] In the field of road maintenance engineering, asphalt pavement repair operations in ultra-low temperature environments have always faced technical challenges such as low material mixing efficiency and poor mixing uniformity. As the core repair material in this scenario, the mixing quality of cold-mix asphalt mixture directly determines the compaction degree, bond strength, and durability of the repaired pavement.

[0003] Existing ultra-low temperature cold-patch asphalt mixture mixing equipment mostly adopts a unidirectional spiral conveying or blade mixing structure. Traditional horizontal mixing drums only have unidirectional spiral blades. In ultra-low temperature environments, the viscosity of asphalt binder in cold-patch asphalt mixtures increases significantly, and aggregate particles are prone to rigid agglomeration due to low temperature. The unidirectional spiral structure can only achieve unidirectional pushing and preliminary mixing along the axis of the mixing drum, and cannot effectively shear and disperse agglomerated particles. In actual operation, in order to achieve a basic mixing effect, the mixing time needs to be extended to 2-3 times that of normal temperature conditions. This not only seriously restricts the construction efficiency of road repair, but may also cause low-temperature aging of asphalt binder due to prolonged mixing, reducing the road performance of the mixture. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a rapid mixing device for ultra-low temperature cold-patch asphalt mixtures. This device addresses the issue that existing ultra-low temperature cold-patch asphalt mixture mixing devices mostly adopt a single-direction spiral conveying or blade mixing structure. Traditional horizontal mixing drums only have unidirectional spiral blades. In ultra-low temperature environments, the viscosity of the asphalt binder in cold-patch asphalt mixtures increases significantly, and aggregate particles are prone to rigid agglomeration due to low temperatures. The unidirectional spiral structure can only achieve unidirectional pushing and preliminary mixing along the axis of the mixing drum, and cannot effectively shear and disperse agglomerated particles. In actual operation, to achieve a basic mixing effect, the mixing time needs to be extended to 2-3 times that under normal temperature conditions. This not only seriously restricts the construction efficiency of road repair, but may also cause low-temperature aging of the asphalt binder due to prolonged mixing, reducing the road performance of the mixture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid mixing device for ultra-low temperature cold-mix asphalt mixture, comprising:

[0006] A heating base, with a feeding cylinder fixedly connected inside and a mixing cylinder fixedly installed on the top of the heating base;

[0007] A stirring and mixing structure is located on the mixing cylinder;

[0008] The mixing structure includes two gears, a stepper motor, a fixed plate, and two mixing spirals. Both mixing spirals are rotatably connected inside the mixing cylinder. The ends of the two mixing spirals away from the feeding cylinder extend rotatably to the outside of the mixing cylinder and are fixedly connected to the corresponding gears. The two gears are meshed together. The fixed plate is fixedly connected to the side of the mixing cylinder away from the feeding cylinder. The stepper motor is installed on the side of the fixed plate away from the mixing cylinder. The output end of the stepper motor extends rotatably into the inside of the fixed plate and is fixedly connected to the corresponding gear. A feed hopper is fixedly connected to the outer surface of the mixing cylinder. The feed hopper is located above the mixing cylinder and communicates with the inside of the mixing cylinder.

[0009] Preferably, the mixing structure further includes a second stepper motor, a conveying screw, a reflux screw, a circulating reflux cylinder, and a first stepper motor. The circulating reflux cylinder is fixedly connected to the outer surface of the feeding cylinder, and the end of the circulating reflux cylinder away from the feeding cylinder passes through the feeding hopper. The second stepper motor is installed at the top of the feeding cylinder, and the output end of the second stepper motor rotates and extends into the interior of the feeding cylinder and is fixedly connected to the conveying screw. The first stepper motor is installed on the side of the circulating reflux cylinder away from the feeding cylinder, and the output end of the first stepper motor rotates and extends into the interior of the circulating reflux cylinder and is fixedly connected to the reflux screw.

[0010] Preferably, the bottom end of the feeding cylinder is threaded with a sealing cover.

[0011] Preferably, the mixing cylinder is internally fixedly connected to two support frames three, and the ends of the two mixing spirals away from the corresponding gears are respectively rotatably connected to the interior of the corresponding support frame three.

[0012] Preferably, a second support frame is fixedly connected inside the feeding cylinder, and the bottom end of the conveying screw is rotatably connected inside the second support frame.

[0013] Preferably, a support frame is fixedly connected inside the circulating reflux cylinder, and the end of the reflux spiral away from the stepper motor is rotatably connected inside the support frame.

[0014] Preferably, a guide plate is fixedly connected inside the feed hopper, the guide plate is located above the circulation return cylinder, and a box cover is hinged to the top of the feed hopper.

[0015] Preferably, a control panel is installed on one side of the feed hopper.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This ultra-low temperature cold-patch asphalt mixture rapid mixing device uses two gears to drive two mixing screws to rotate synchronously, which can efficiently mix the raw materials in the mixing drum. At the same time, through the circulation and return structure composed of stepper motor II, conveying screw, stepper motor I, return screw and circulation return drum, the initially mixed mixture can be transported back to the mixing drum for secondary mixing. This allows the two mixing screws to rotate synchronously, forming a bidirectional shearing and mixing effect. This bidirectional mixing structure can fully shear and knead the asphalt binder with increased viscosity at ultra-low temperature and the rigid agglomerated aggregate particles, effectively breaking the agglomeration between particles, so that the asphalt binder uniformly coats the aggregate particles. This avoids the problem of uneven mixing caused by the traditional unidirectional structure that can only push in one direction, thereby improving the mixing quality of ultra-low temperature cold-patch asphalt mixture. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the sealing cover structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the mixing cylinder of this utility model;

[0022] Figure 4 This is a schematic diagram of the guide plate structure of this utility model.

[0023] Attached reference numerals: 1. Heating base; 2. Mixing cylinder; 3. Feeding cylinder; 4. Circulating return cylinder; 5. Feed hopper; 6. Stepper motor one; 7. Stepper motor two; 8. Stepper motor three; 9. Fixing plate; 10. Gear; 11. Control panel; 12. Sealing cover; 13. Guide plate; 14. Mixing screw; 15. Conveying screw; 16. Return screw; 17. Support frame one; 18. Support frame three; 19. Support frame two. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] Heating base 1: Provides the installation foundation for the device, with the feeding cylinder 3 fixedly connected inside and the mixing cylinder 2 fixedly installed on the top, serving to support and fix the feeding cylinder 3 and the mixing cylinder 2;

[0029] Mixing cylinder 2: Used to contain and mix raw materials of ultra-low temperature cold patch asphalt mixture. It has two mixing screws 14 internally and two support frames 18 fixedly connected. The feed hopper 5 is fixedly connected to the outer surface and communicates with the inside of the feed hopper 5.

[0030] Feeding cylinder 3: Used to convey mixed materials. It is internally connected to a conveying screw 15 and a fixed support frame 19. The outer surface is fixedly connected to a circulating return cylinder 4. A stepper motor 7 is installed at the top and a sealing cover 12 is threaded at the bottom.

[0031] Circulating return cylinder 4: realizes the circulation and return of the mixture, is fixedly connected to the outer surface of the feeding cylinder 3, and the end away from the feeding cylinder 3 passes through the feeding hopper 5. The internal rotating connection is the return spiral 16, the fixed connection is the support frame 17, and the stepper motor 6 is installed on one side.

[0032] Feed hopper 5: Used for feeding raw materials, fixed on the outer surface of mixing cylinder 2 and located above it, communicating with mixing cylinder 2, with guide plate 13 fixedly connected inside, box cover hinged on top, and control panel 11 installed on one side;

[0033] Stepper motor 6: Installed on the side of the circulating return cylinder 4 away from the feeding cylinder 3, with its output end extending into the interior of the circulating return cylinder 4 and fixedly connected to the return spiral 16. After starting, it drives the return spiral 16 to rotate to convey the mixture.

[0034] Stepper motor 27: Installed on the top of the feeding cylinder 3, with the output end extending into the inside of the feeding cylinder 3 and fixedly connected to the conveying screw 15. It rotates forward to convey the initially stirred mixture and rotates backward to push the well mixed mixture to the bottom of the feeding cylinder 3.

[0035] Stepper motor 38: Installed on the side of the fixed plate 9 away from the mixing cylinder 2, with the output end extending into the interior of the fixed plate 9 and fixedly connected to the corresponding gear 10. After starting, it drives the gear 10 to rotate, thereby driving the mixing spiral 14 to stir.

[0036] Fixed plate 9: Fixedly connected to the side of mixing cylinder 2 away from feeding cylinder 3, used to install stepper motor 8 and provide fixed support for stepper motor 8;

[0037] Gears 10: There are two in total, which are fixedly connected to the ends of the two mixing screws 14 away from the feeding cylinder 3, and the two gears 10 mesh. When one gear is driven to rotate by the stepper motor 38, it drives the other gear to rotate synchronously, thereby making the mixing screw 14 rotate.

[0038] Control panel 11: Installed on one side of feed hopper 5, it can individually control all the marked structures of the device, and realize the start, stop and other operations of each structure;

[0039] Sealing cover 12: It is threaded onto the bottom end of the feeding cylinder 3 to seal the bottom end of the feeding cylinder 3 during the mixing operation. After the mixing is completed, it is unscrewed to facilitate the discharge of the mixture.

[0040] Guide plate 13: It is fixedly connected inside the feed hopper 5 and located above the circulation return cylinder 4, guiding the raw material to enter the mixing cylinder 2 smoothly and evenly, while reducing the impact of the raw material on the inner wall of the feed hopper 5;

[0041] Mixing spiral 14: There are two in total, both of which are rotatably connected inside the mixing cylinder 2. The end away from the feeding cylinder 3 extends to the outside of the mixing cylinder 2 and is connected to the gear 10. It is driven by the gear 10 to rotate and shear, stir and mix the raw materials.

[0042] Conveying screw 15: Rotatably connected inside the feeding cylinder 3, with its top end fixedly connected to the output end of stepper motor 7, and rotated by it to realize the conveying of the mixture in the feeding cylinder 3;

[0043] Return spiral 16: Rotatably connected inside the circulating return cylinder 4, one end is fixedly connected to the output end of stepper motor 6, and rotates under its drive to transport the mixture in the feeding cylinder 3 to the circulating return cylinder 4 and then back to the feeding hopper 5;

[0044] Support frame 17: It is fixedly connected inside the circulating return cylinder 4 and rotatably connected to the end of the return spiral 16 away from the stepper motor 16, providing support for the rotation and conveying of the return spiral 16 and ensuring stability;

[0045] Support frame three 18: There are two in total, which are fixedly connected inside the mixing cylinder 2 and are rotatably connected to the ends of the two mixing spirals 14 away from the corresponding gears 10, respectively, to support the mixing spirals 14 and prevent them from shaking at high speed;

[0046] Support frame 2 19: It is fixedly connected inside the feeding cylinder 3 and rotatably connected to the bottom end of the conveying screw 15 to provide support for the conveying screw 15 and ensure its stable conveying of the mixture.

[0047] Example 1:

[0048] like Figure 1-4 As shown, when the stepper motor 38 is started, the output end of the stepper motor 38 drives the gear 10 fixedly connected to it to rotate. Since the two gears 10 are meshed, the other gear 10 rotates synchronously. The two gears 10 drive the two mixing spirals 14 to rotate inside the mixing cylinder 2, and shear, stir and mix the raw materials entering the mixing cylinder 2.

[0049] When stepper motor 7 is started, its output drives the conveying screw 15 to rotate. When the conveying screw 15 rotates inside the feeding cylinder 3, it conveys part of the mixture after preliminary mixing in the mixing cylinder 2 into the feeding cylinder 3. At the same time, stepper motor 6 is started, and its output drives the return screw 16 to rotate. The return screw 16 conveys the mixture in the feeding cylinder 3 into the circulating return cylinder 4, and then conveys it back to the feed hopper 5 through the circulating return cylinder 4, where it re-enters the mixing cylinder 2. The two mixing screws 14 then perform secondary shearing and mixing, and the mixed mixture is pushed to the bottom of the opened feeding cylinder 3 for discharge.

[0050] Example 2:

[0051] like Figure 4 As shown, the guide plate 13 is fixedly connected inside the feed hopper 5 and located above the circulation return cylinder 4. During the raw material feeding stage, it can guide the ultra-low temperature cold patch asphalt mixture raw material fed from the top cover of the feed hopper 5. Its special tilt angle and structural design can prevent the raw material from directly impacting the bottom of the feed hopper 5 or accumulating in a certain area due to gravity. Instead, it can evenly distribute the raw material to different positions inside the mixing cylinder 2, providing conditions for the subsequent shearing and mixing of the mixing spiral 14. This reduces the problem of uneven mixing caused by local accumulation of raw materials from the source and ensures the basic stability of the mixing quality.

[0052] Furthermore, when using the device, first open the hinged box cover at the top of the feed hopper 5, and put the raw material of the ultra-low temperature cold patch asphalt mixture into the feed hopper 5. After the raw material enters, it will enter the mixing cylinder 2 smoothly and evenly under the guidance of the guide plate 13 fixedly connected inside the feed hopper 5. At the same time, the guide plate 13 can also reduce the impact of the raw material on the inner wall of the feed hopper 5.

[0053] When the stepper motor 38 is started, the output end of the stepper motor 38 drives the gear 10 fixedly connected to it to rotate. Since the two gears 10 are meshed, the other gear 10 rotates synchronously. The two gears 10 drive the two mixing spirals 14 to rotate inside the mixing cylinder 2, and shear and stir the raw materials entering the mixing cylinder 2. During this process, the two support frames 3 18 fixedly connected inside the mixing cylinder 2 support the ends of the two mixing spirals 14 away from the corresponding gears 10, respectively, to ensure the stability of the mixing spirals 14 when rotating and to avoid shaking caused by high-speed rotation, which would affect the stirring effect.

[0054] When stepper motor 27 is started, its output drives the conveying screw 15 to rotate. As the conveying screw 15 rotates inside the feeding cylinder 3, it conveys part of the mixture that has been initially stirred in the mixing cylinder 2 into the feeding cylinder 3. The support frame 2 19, which is fixedly connected inside the feeding cylinder 3, supports the bottom end of the conveying screw 15 to ensure stable conveying. At the same time, stepper motor 16 is started, and its output drives the return screw 16 to rotate. The return screw 16 conveys the mixture in the feeding cylinder 3 into the circulating return cylinder 4, and then back to the feeding hopper 5 through the circulating return cylinder 4. It is then guided by the guide plate 13 to re-enter the mixing cylinder 2, where it is further sheared and mixed by the two mixing screws 14. The support frame 17, which is fixedly connected inside the circulating return cylinder 4, supports the end of the return screw 16 away from stepper motor 16 to ensure the stability of the rotation and conveying of the return screw 16.

[0055] After the mixture has been circulated and stirred multiple times to achieve the preset mixing effect, the stepper motor 7 reverses and pushes the mixed mixture to the bottom of the feeding cylinder 3. At this time, the sealing cover 12 threaded at the bottom of the feeding cylinder 3 is unscrewed, and the mixed ultra-low temperature cold patch asphalt mixture can be discharged from the bottom of the feeding cylinder 3, completing the entire mixing operation.

[0056] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rapid mixing device for ultra-low temperature cold-patch asphalt mixture, characterized in that, include: Heating base (1), a feeding cylinder (3) is fixedly connected inside the heating base (1), and a mixing cylinder (2) is fixedly installed on the top of the heating base (1); A stirring and mixing structure is located on the mixing cylinder (2); The mixing structure includes two gears (10), a stepper motor (8), a fixed plate (9), and two mixing spirals (14). The two mixing spirals (14) are rotatably connected inside the mixing cylinder (2). The ends of the two mixing spirals (14) away from the feeding cylinder (3) are rotatably extended to the outside of the mixing cylinder (2) and fixedly connected to the corresponding gears (10). Two gears (10) are meshed and connected. A fixed plate (9) is fixedly connected to the side of the mixing cylinder (2) away from the feeding cylinder (3). A stepper motor (8) is installed on the side of the fixed plate (9) away from the mixing cylinder (2). The output end of the stepper motor (8) rotates and extends into the interior of the fixed plate (9) and is fixedly connected to the corresponding gear (10). A feeding hopper (5) is fixedly connected to the outer surface of the mixing cylinder (2). The feeding hopper (5) is located above the mixing cylinder (2) and communicates with the interior of the mixing cylinder (2).

2. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 1, characterized in that: The mixing structure also includes a second stepper motor (7), a conveying screw (15), a return screw (16), a circulating return cylinder (4) and a first stepper motor (6), with the circulating return cylinder (4) fixedly connected to the outer surface of the feeding cylinder (3); Among them, the end of the circulating return cylinder (4) away from the feeding cylinder (3) passes through the feeding hopper (5), the second stepper motor (7) is installed on the top of the feeding cylinder (3), the output end of the second stepper motor (7) rotates and extends into the interior of the feeding cylinder (3) and is fixedly connected to the conveying screw (15), the first stepper motor (6) is installed on the side of the circulating return cylinder (4) away from the feeding cylinder (3), the output end of the first stepper motor (6) rotates and extends into the interior of the circulating return cylinder (4) and is fixedly connected to the return screw (16).

3. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 1, characterized in that: The bottom end of the feeding cylinder (3) is threaded with a sealing cover (12).

4. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 1, characterized in that: The mixing cylinder (2) has two fixed support frames (18) inside, and the ends of the two mixing spirals (14) away from the corresponding gears (10) are respectively rotatably connected to the inside of the corresponding support frames (18).

5. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 2, characterized in that: The feed cylinder (3) is fixedly connected to a support frame two (19), and the bottom end of the conveying screw (15) is rotatably connected to the inside of the support frame two (19).

6. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 2, characterized in that: The circulation return cylinder (4) is fixedly connected to a support frame (17), and the end of the return spiral (16) away from the stepper motor (6) is rotatably connected to the inside of the support frame (17).

7. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 2, characterized in that: The feed hopper (5) is fixedly connected to a guide plate (13), which is located above the circulation return cylinder (4). The top of the feed hopper (5) is hinged with a box cover.

8. The ultra-low temperature cold-patch asphalt mixture rapid mixing device according to claim 1, characterized in that: A control panel (11) is installed on one side of the feed hopper (5).

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