Small batch pour-in-place asphalt production equipment

Abstract

This utility model provides a small-batch castable asphalt preparation equipment, belonging to the field of maintenance technology. It solves the technical problem that using large-scale mixing equipment to prepare castable asphalt mixtures for small-scale daily maintenance projects is uneconomical and unreasonable in existing technologies. The equipment includes a double-layer shell, with a heating element for heating the inner shell located between the inner and outer shells. The lower end of the shell has a discharge port communicating with the interior of the inner shell, and the top of the shell has a cover with at least one inlet communicating with the interior of the inner shell. It also includes a stirring shaft, comprising a drive section, a stirring section, and a feeding ring. The drive section is located at the outer end of the cover and can drive the stirring shaft to rotate or move axially. The stirring section is located inside the inner shell and can stir the raw materials. The feeding ring is located in the transition zone between the shell body and the discharge port, and the cross-section of the feeding ring matches the discharge port. This design effectively reduces production costs, meets the needs of small-batch production, and ensures material performance.

Description

Technical Field

[0001] This utility model relates to the field of maintenance technology, specifically to a small-batch cast-in-place asphalt preparation equipment. Background Technology

[0002] Cast-in-place asphalt mixtures offer numerous advantages. Their near-zero porosity allows for self-compacting without compaction, effectively preventing water penetration. The resulting asphalt mastic exhibits strong toughness and resistance to deformation, adapting to traffic loads and temperature variations. Furthermore, its excellent self-leveling properties allow it to bond tightly to the original paving, deforming in unison. Its outstanding road performance ensures long-term maintenance and repair of the pavement under sustained vehicle loads, making it an ideal material for routine maintenance.

[0003] However, routine maintenance projects mostly involve small-scale material needs. If large-scale mixing equipment is used to prepare cast-in-place asphalt mixtures, the production cost will increase significantly due to factors such as equipment investment and operating costs, which is not economically reasonable and cannot meet the economic requirements of routine maintenance projects. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes a small-batch castable asphalt preparation equipment, which solves the technical problem that using large-scale mixing equipment to prepare castable asphalt mixtures for small-scale daily maintenance projects is uneconomical and unreasonable in the existing technology.

[0005] The technical solution adopted in this utility model is: a small-batch cast-in-place asphalt preparation equipment, comprising: The shell body is double-layered, with a heating element for heating the inner shell provided between the inner shell and the outer shell. The lower end of the shell is provided with a discharge port communicating with the interior of the inner shell, and the top of the shell is provided with a cover. The cover is provided with at least one inlet communicating with the interior of the inner shell. It also includes a stirring shaft, which includes a drive section, a stirring section and a feeding ring. The drive section is located at the outer end of the cover body and can drive the stirring shaft to rotate or move axially. The stirring section is located inside the inner shell of the main body and can stir the raw materials. The feeding ring is located in the transition area between the main body of the shell and the discharge port and the cross section of the feeding ring matches the discharge port.

[0006] Optionally, a limiting plate is provided on the drive section after the stirring shaft passes through the cover. The cover is also provided with a driving fork and a telescopic power source. The middle part of the driving fork is hinged to the cover. One end of the driving fork is provided with an abutment platform, and the other end is provided with a hinge seat. One end of the abutment platform abuts against the limiting plate along the axial direction of the stirring shaft. One end of the telescopic power source is hinged to the hinge seat end of the driving fork, and the other end of the telescopic power source is hinged to the cover.

[0007] Optionally, the abutment platform is provided with a vertically penetrating slot, the upper end face of the abutment platform contacts the lower end face of the limiting plate, and the stirring shaft passes through the slot; or, the abutment platform is provided with a vertically penetrating slot and a horizontally penetrating slot, the limiting plate is located in the horizontally penetrating slot, and the stirring shaft is located in the vertically penetrating slot.

[0008] Optionally, the drive section after the stirring shaft passes through the cover is provided with a driven gear, and the cover is also provided with a drive gear and a rotational power source. The drive gear and the driven gear mesh and can slide relative to each other axially. The drive gear is driven by the rotational power source.

[0009] Optionally, the stirring section of the stirring shaft is provided with stirring blades, one side of which is fixed to the stirring shaft, and the other three sides do not contact the shell and the cover. The contact line between the stirring blades and the stirring shaft is a spiral line, and multiple stirring blades are arranged in an array around the stirring shaft.

[0010] Optionally, the upper and lower edges of the stirring plate are provided with reinforcing rods, which are fixedly connected to the stirring plate and the stirring shaft.

[0011] Optionally, the ends of the reinforcing rods at the same height level are also connected as one piece by a ring.

[0012] Optionally, the upper and lower ends of the stirring shaft's feed rings are provided with spiral blades, the outer diameter of which is smaller than the inner diameter of the discharge port.

[0013] Optionally, the inner shell is made of metal, and the heating element is an electromagnetic induction coil wound between the inner shell and the outer shell.

[0014] Optionally, the inner layer of the outer shell is provided with a heat insulation layer.

[0015] As can be seen from the above technical solution, the beneficial technical effects of this utility model are as follows: Its double-layered shell and heating element ensure precise temperature control for optimal preparation conditions. The ingeniously designed stirring shaft allows for flexible drive and powerful mixing to promote uniform mixing of raw materials. The matching discharge ring and outlet effectively facilitate material flow and prevent blockages. This equipment is specifically designed for small-batch production, avoiding the high costs of large-scale mixing equipment, meeting the small-scale needs of routine maintenance projects, and ensuring the performance of cast-in-place asphalt mixtures. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the overall shape of the device.

[0018] Figure 2 This is a cross-sectional view of the shell.

[0019] Figure 3 This is a schematic diagram of the cover and its interior.

[0020] Reference numerals: Inner shell 1, Outer shell 2, Heating element 3, Discharge port 4, Cover 5, Inlet 51, Drive fork 52, Abutment platform 521, Hinge 522, Telescopic power source 53, Drive gear 54, Rotation power source 55, Stirring shaft 6, Limiting disc 61, Stirring blade 62, Reinforcing rod 63, Annular ring 64, Discharge ring 65, Driven gear 66, Spiral blade 67. Detailed Implementation

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0023] Small-batch cast-in-place asphalt preparation equipment, please refer to the appendix. Figure 1 One possible implementation method is as follows: The shell is double-layered. A heating element 3 for heating the inner shell 1 is provided between the inner shell 1 and the outer shell 2. The lower end of the shell is provided with a discharge port 4 that communicates with the interior of the inner shell 1. The top of the shell is provided with a cover 5. At least one inlet 51 is provided on the cover 5 that communicates with the interior of the inner shell 1. It further includes a stirring shaft 6, which includes a driving section, a stirring section, and a blanking ring 65. The driving section is located at the outer end of the cover body 5 and can drive the stirring shaft 6 to rotate or move axially. The stirring section is located inside the inner layer housing 1 of the main body and can stir the raw materials. The blanking ring 65 is located in the transition area between the main body of the housing and the discharge port 4, and the cross-section of the blanking ring 65 matches that of the discharge port 4. When the stirring shaft 6 rotates, it can stir the raw materials inside the inner layer housing 1. When the stirring shaft 6 moves axially, the position of the blanking ring 65 can be adjusted. The blanking ring 65 has at least two position states. One is located at the discharge port 4 to block the discharge port 4, and the other is moved up to the inside of the inner layer housing 1 to connect the discharge port 4 to the inside of the inner layer housing 1 and enable discharging.

[0024] The preparation process配套 with the device is as follows: Put 0 - 3 mm basalt or diabase or limestone fine aggregate into the inner layer housing 1 and mix (the stirring shaft 6 moves down to let the blanking ring 65 block the discharge port 4, and the stirring shaft 6 rotates for mixing). When the temperature rises to 110 - 130 °C, then put in No. 1, No. 2, and No. 3 mineral materials (No. 1 material is 5 - 10 mm basalt or diabase coarse aggregate, No. 2 material is 3 - 5 mm basalt or diabase coarse aggregate, and No. 3 is ground limestone powder) and continue to mix. After mixing evenly, put in polymer modified asphalt at 175 - 185 °C for mixing, or put in 70# matrix asphalt at 135 - 140 °C after mixing evenly, and at the same time add one or more of fusible polymer modifiers, viscosity reducers, plasticizers, and natural asphalt, continuously stir and heat to 230 - 240 °C, and then keep stirring for heat preservation. After all the mixing processes are completed, the stirring shaft 6 moves up to open the discharge port 4, and the continuous rotation of the stirring shaft 6 can promote the discharge of the finished product from the discharge port 4. The above process is only an example of the use process of this preparation equipment. The listed ratios, temperatures and other parameters are not the core points of this solution. Those skilled in the art can freely select appropriate ratios and mixing temperatures and other parameters based on the parameter requirements of the target asphalt.

[0025] For the small - batch pouring asphalt preparation equipment in the above - mentioned embodiment, the double - layer structure of the housing配合 with the heating component 3 can control the temperature and heat the outer layer housing 2, and配合 with the stirring effect, quickly heat and keep the raw materials inside the outer layer housing 2 warm, ensuring a stable preparation environment. The stirring shaft 6 has a unique design. The driving section drives flexibly, the stirring section stirs the raw materials sufficiently, and the blanking ring 65 can move axially. It can both block the discharge port 4 for convenient stirring and move up to open the discharge port 4 to promote discharging, preventing blockage. This equipment can meet the small - batch production requirements, reduce the cost of using large - scale equipment, and can be flexibly adapted to different raw materials and process parameters.

[0026] In the above embodiments, all stirring and heating operations are completed within a single housing, offering significant advantages compared to the partitioned stirring and conveying mixing methods of existing large-scale equipment. This reduces the number of stirring housings, simplifies the equipment structure, and lowers manufacturing costs and floor space. Simultaneously, it eliminates the need for various material conveying systems, avoiding material loss and time waste during transport, thus improving production efficiency. Furthermore, the double-layered housing structure, combined with temperature control via the heating element 3 and the ingeniously designed stirring shaft 6, balances stirring and material feeding, meeting the needs of small-batch production.

[0027] In one possible implementation, see Appendix Figure 3 A limiting plate 61 is provided on the drive section after the stirring shaft 6 passes through the cover 5. The cover 5 is also provided with a drive fork 52 and a telescopic power source 53. The middle part of the drive fork 52 is hinged to the cover 5. One end of the drive fork 52 is provided with an abutment platform 521, and the other end is provided with a hinge seat 522. One end of the abutment platform 521 abuts against the limiting plate 61 along the axial direction of the stirring shaft 6. One end of the telescopic power source 53 is hinged to the hinge seat 522 end of the drive fork 52, and the other end of the telescopic power source 53 is hinged to the cover 5. When the telescopic power source 53 extends or retracts, it can push / pull the drive fork 52 to rotate, thereby raising the position of the stirring shaft 6 / limiting plate 61, thereby allowing the material feeding ring 65 at the lower end of the stirring shaft 6 to move axially, thereby adjusting the opening (discharging) and closing (stirring) state of the discharge port 4.

[0028] Specifically, in one possible implementation, see Appendix Figure 3 The abutment platform 521 is provided with a vertical through slot, the upper end face of the abutment platform 521 is in contact with the lower end face of the limiting plate 61, and the stirring shaft 6 passes through the slot; or, the abutment platform 521 is provided with a vertical through slot and a horizontal through slot, the limiting plate 61 is located in the horizontal through slot and the stirring shaft 6 is located in the vertical through slot.

[0029] The drive structure of the above embodiment has more advantages. The drive section of the stirring shaft 6 is equipped with a limiting plate 61, which works in conjunction with the drive fork 52 and telescopic power source 53 on the cover 5. The telescopic power source 53 pushes / pulls the drive fork 52 to flip, thereby adjusting the position of the stirring shaft 6 (discharge ring 65) and realizing the flexible opening and closing of the discharge port 4. In addition, the groove design on the drive fork 52 ensures the stability of the structure under stress, meeting the needs of small batch production of asphalt.

[0030] In one possible implementation, see Appendix Figure 3The stirring shaft 6, after exiting the cover 5, has a driven gear 66 on its drive section. The cover 5 also has a drive gear 54 and a rotational power source 55. The drive gear 54 meshes with the driven gear 66 and can slide axially relative to each other. The drive gear 54 is driven by the rotational power source 55. In the above embodiment, in the stirring shaft drive design, the driving section of the stirring shaft 6 has a driven gear 66, and the cover 5 has a drive gear 54 and a rotational power source 55. The two mesh and can slide axially relative to each other. The gear design has a certain width, so that even if there is a certain degree of misalignment, the transmission can be stable. This ensures both the flexible axial movement of the stirring shaft 6 to adjust the discharge and the stable rotation to complete the stirring.

[0031] In one possible implementation, see Appendix Figure 3 The stirring section of the stirring shaft 6 is equipped with stirring blades 62. One side of the stirring blade 62 is fixed to the stirring shaft 6, while the other three sides do not contact the shell or cover 5. The contact line between the stirring blade 62 and the stirring shaft 6 is a spiral, and multiple stirring blades 62 are arranged in an array around the stirring shaft 6. Reinforcing rods 63 are provided on both the upper and lower edges of the stirring blades 62, and the reinforcing rods 63 are fixedly connected to the stirring blades 62 and the stirring shaft 6. The ends of the reinforcing rods 63 at the same height are also connected as a single unit by an annular ring 64. With one side of the stirring blade 62 fixed and the other edges not contacting the shell or cover 5, and the contact line between the stirring blade 62 and the shaft being a spiral with multiple blades arranged in an array, the raw materials can be thoroughly stirred. During the stirring process, the raw materials are promoted to flow upwards along the inclined surface of the stirring blade 62, improving the uniformity of mixing. The reinforcing rods 63 on the upper and lower edges, and the ends of the reinforcing rods 63 at the same height being connected by an annular ring 64, enhance the strength and stability of the stirring blades 62, ensuring efficient and stable stirring.

[0032] In one possible implementation, see Appendix Figure 3 Spiral blades 67 are provided at the upper and lower ends of the feeding rings 65 on the mixing shaft 6. The outer diameter of the spiral blades 67 is smaller than the inner diameter of the discharge port 4. During discharge, the spiral blades 67 can generate spiral thrust by utilizing their spiral structure, effectively pushing the viscous asphalt to be discharged smoothly, avoiding the problem of poor discharge caused by the viscosity of the asphalt, ensuring the continuity and stability of the discharge, and improving the overall performance of the equipment.

[0033] In one possible implementation, the inner shell 1 is made of metal, and the heating element 3 is an electromagnetic induction coil wound between the inner shell 1 and the outer shell 2. The inner layer of the outer shell 2 is provided with a heat insulation layer, and the outer shell 2 is fixedly connected to the outer periphery of the inner shell by a low thermal conductivity material. The heating of the electromagnetic induction coil is based on Faraday's law of electromagnetic induction and the Joule heating effect. When a high-frequency alternating current is applied to the electromagnetic induction coil (heating element 3), an alternating magnetic field is generated around it. Since the inner shell 1 is made of metal, when placed in this alternating magnetic field, the free electrons inside the metal undergo directional movement under the influence of the Lorentz force, forming eddy currents. According to Joule's law, the eddy currents generate heat under the action of the metal resistance, achieving self-heating of the inner shell 1. This process does not require direct contact with the heat source; energy conversion is achieved through electromagnetic field coupling, exhibiting high efficiency and cleanliness.

[0034] The inner insulation layer of the outer shell 2 typically employs multi-layered insulation materials. Its core principle involves alternating layers of high-reflectivity metal films (such as aluminized polyimide films) and low-thermal-conductivity spacers (such as polyester mesh) to form a composite structure. This insulation layer technology is currently available. During electromagnetic induction heating, the insulation layer reflects heat back to the interior, preventing the temperature of the outer shell 2 from rising synchronously with the inner shell, thus reducing heat loss and significantly improving energy efficiency. The temperature of the outer shell 2 is controlled, meeting human contact safety standards and preventing burns to operators; it also prevents flammable materials around the equipment from igniting due to high temperatures, improving production safety.

[0035] As an alternative to the above embodiments, in one possible approach, heat-conducting oil is filled between the inner shell 1 and the outer shell 2. Furthermore, the heating method involves heating the outer shell 2 by burning it.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A small-batch cast asphalt production plant, characterized in that, include: The shell is double-layered, with a heating element (3) for heating the inner shell (1) provided between the inner shell (1) and the outer shell (2). The lower end of the shell is provided with a discharge port (4) that communicates with the interior of the inner shell (1). The top of the shell is provided with a cover (5), and the cover (5) is provided with at least one inlet (51) that communicates with the interior of the inner shell (1). It also includes a stirring shaft (6), which includes a driving section, a stirring section and a feeding ring (65). The driving section is located at the outer end of the cover (5) and can drive the stirring shaft (6) to rotate or move axially. The stirring section is located inside the inner shell (1) of the main body and can stir the raw materials. The feeding ring (65) is located in the transition area between the main body of the shell and the discharge port (4) and the cross section of the feeding ring (65) matches the discharge port (4).

2. The small-batch casting asphalt preparation equipment as described in claim 1, characterized in that: The stirring shaft (6) is provided with a limiting plate (61) on the drive section after it passes through the cover (5). The cover (5) is also provided with a driving fork (52) and a telescopic power source (53). The middle part of the driving fork (52) is hinged to the cover (5). One end of the driving fork (52) is provided with an abutment platform (521) and the other end is provided with a hinge seat (522). One end of the abutment platform (521) abuts against the limiting plate (61) along the axial direction of the stirring shaft (6). One end of the telescopic power source (53) is hinged to the hinge seat (522) end of the driving fork (52), and the other end of the telescopic power source (53) is hinged to the cover (5).

3. The small-batch casting asphalt preparation equipment as described in claim 2, characterized in that: The abutment platform (521) is provided with a vertical through slot, the upper end face of the abutment platform (521) is in contact with the lower end face of the limiting plate (61), and the stirring shaft (6) passes through the slot. Alternatively, the abutment platform (521) is provided with a vertical through slot and a horizontal through slot, the limiting plate (61) is located in the horizontal through slot and the stirring shaft (6) is located in the vertical through slot.

4. The small-batch casting asphalt preparation equipment as described in claim 1, characterized in that: The driven section of the stirring shaft (6) after it passes through the cover (5) is provided with a driven gear (66). The cover (5) is also provided with a driving gear (54) and a rotational power source (55). The driving gear (54) and the driven gear (66) mesh and can slide relative to each other axially. The driving gear (54) is driven by the rotational power source (55).

5. The small-batch casting asphalt preparation equipment as described in claim 1, characterized in that: The stirring section of the stirring shaft (6) is provided with stirring blades (62). One side of the stirring blades (62) is fixed to the stirring shaft (6), and the other three sides do not contact the shell and the cover (5). The contact line between the stirring blades (62) and the stirring shaft (6) is a spiral line. Multiple stirring blades (62) are arranged in an array around the stirring shaft (6).

6. The small batch pour-in-place asphalt preparation apparatus of claim 5, wherein: The upper and lower edges of the stirring plate (62) are provided with reinforcing rods (63), which are fixedly connected to the stirring plate (62) and the stirring shaft (6).

7. The small batch pour-in-place asphalt preparation apparatus of claim 6, wherein: The ends of the reinforcing rods (63) at the same height level are also connected together by a ring (64).

8. The small batch pour-in-place asphalt preparation apparatus of claim 1, wherein: On the stirring shaft (6), the upper and lower ends of the feeding ring (65) are provided with spiral blades (67), and the outer diameter of the spiral blades (67) is smaller than the inner diameter of the discharge port (4).

9. The small batch pour-in-place asphalt preparation apparatus of claim 1, wherein: The inner shell (1) is made of metal, and the heating component (3) is an electromagnetic induction coil wound between the inner shell (1) and the outer shell (2).

10. The small batch pour-in-place asphalt preparation apparatus of claim 1, wherein: The inner layer of the outer shell (2) is provided with a heat insulation layer.

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