A mobile asphalt mixing plant for low-temperature asphalt mixing

Abstract

This invention discloses a mobile asphalt mixing plant for low-temperature asphalt mixing, comprising a main body with a central through groove formed in the middle of the top plate of the main body. A feed hopper is located directly below the central through groove and within the main body. Connecting support seats are fixed to the front and rear of the bottom center of the left and right side plates of the feed hopper, and weighing sensors are installed on the bottom surface of the connecting support seats. This system dries the air in the main body, ensuring that there is virtually no water during mixing in the mixing tank, thus guaranteeing the mixing effect. Furthermore, it directly senses and weighs the aggregate after it is poured into the feed hopper, ensuring the accuracy of the feed quantity. It eliminates the need for separate weighing before feeding, reducing pre-feeding operations. Simultaneously, it first pours asphalt into an asphalt filling tank, and then transports it to the mixing tank via an asphalt delivery pump, enabling continuous transport. Moreover, the asphalt filling tank can automatically weigh the incoming asphalt, eliminating the need for a pre-weighing process.

Description

Technical Field

[0001] This invention relates to the field of asphalt processing equipment technology, and more specifically to a mobile asphalt mixing plant for low-temperature asphalt mixing. Background Technology

[0002] Existing asphalt mixing equipment typically uses high-temperature mixing, where the asphalt temperature reaches 150℃ to 170℃. At this temperature, harmful gases in the asphalt are easily volatilized, affecting the surrounding air environment. Therefore, to improve environmental protection, cold-mix asphalt is now used, which only requires mixing asphalt heated to 60℃. However, this type of asphalt cannot contain water, and its proportion control is crucial. Existing high-temperature asphalt mixing equipment is exposed to the elements. When the external air humidity is too high, water droplets will form on the surface of the mixed material or the inner wall of the mixing tank, easily introducing water into the mixing equipment and affecting the mixing effect.

[0003] Meanwhile, the aggregate enters directly from the feed hopper into the mixing tank for mixing. The amount of aggregate cannot be determined from the feed hopper. It is usually weighed externally before being poured into the feed hopper. However, between weighing and pouring into the feed hopper, some aggregate may fall from the discharge tray, affecting the actual feed amount and causing errors. This affects the subsequent mixing ratio and thus the accuracy of the subsequent output.

[0004] Moreover, the weighing before feeding adds a feeding step, and the effect is not ideal.

[0005] Similarly, in existing asphalt mixing equipment, the asphalt used for mixing is poured directly into the mixing tank from the feed inlet. This results in poor feed uniformity, affecting the subsequent mixing effect. Moreover, the feed amount cannot be controlled; it can only be determined by weighing the corresponding weight externally and then pouring it into the discharge pan. The discharge pan then pushes the asphalt into the mixing tank. However, during the entire process, some asphalt often leaks out from the discharge pan when pouring, affecting the accuracy of the feed amount.

[0006] Moreover, a weighing step is required before feeding, which increases the pre-feeding process and the effect is not ideal. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mobile asphalt mixing plant for low-temperature asphalt mixing. It dries the air in the main tank, reducing humidity and ensuring that there is virtually no water during mixing, thus guaranteeing the mixing effect. Furthermore, it directly senses and weighs the aggregate after it is poured into the feed hopper, ensuring the accuracy of the feed quantity. It eliminates the need for separate weighing before feeding, reducing pre-feeding operations. Simultaneously, it first pours asphalt into an asphalt filling tank, then transports it to the mixing tank via an asphalt delivery pump, enabling continuous conveying. Moreover, the asphalt filling tank can automatically weigh the incoming asphalt, eliminating the need for pre-weighing and improving feeding efficiency and effectiveness.

[0008] The solution of the present invention to the aforementioned technical problem is:

[0009] A mobile asphalt mixing plant for low-temperature asphalt mixing includes a main body. A central through groove is formed in the middle of the top plate of the main body. The feed hopper is located directly below the central through groove and is situated within the main body. Connecting support seats are fixed at the front and rear of the bottom center of the left and right side plates of the feed hopper. Weighing sensors are installed on the bottom surface of the connecting support seats. The base of the weighing sensor is fixed to the top surface of the corresponding transverse beam fixed within the main body. The weight of the material being discharged from the feed hopper can be sensed by the weighing sensor.

[0010] An asphalt filling tank is placed on the top surface of the bottom plate of the main box. First weighing sensors are fixed on the top surface of the bottom plate of the main box below the four corners of the bottom surface of the asphalt filling tank. The sensing connection parts of the top of the four first weighing sensors are fixed at the four corners of the bottom surface of the asphalt filling tank.

[0011] An asphalt delivery pump is fixed on the top surface of the bottom plate of the main box on one side of the asphalt filling tank. The input pipe of the asphalt delivery pump extends into the asphalt filling tank, and the bottom end of the input pipe is close to the top surface of the bottom plate of the asphalt filling tank.

[0012] The discharge end of the asphalt conveying pump is connected to the discharge pipe. A mixing tank is fixed on the top surface of the bottom plate of the main box on one side of the asphalt conveying pump, and the discharge end of the discharge pipe is connected to the mixing tank.

[0013] The top plate of the mixing tank has a main feed inlet formed in the middle, and the discharge channel of the feed hopper is located directly above the main feed inlet.

[0014] At least one powder conveying device is installed in the main box on one side of the feed hopper. The bottom end of the conveying pipe of the powder conveying device is connected to a lower discharge pipe, and the bottom end of the lower discharge pipe is connected to the mixing tank.

[0015] A protective cover is fixed to the top edge of the top plate of the mixing tank. A top cover is fixed to the top surface of the protective cover. An upper transverse feed channel extending to the left and right is formed in the middle of the upper cover. An upper raised frame extending upward is formed on the top surface of the upper cover at the four sides of the upper transverse feed channel. The upper transverse feed channel is connected to the main feed port. At least one powder feed hole is formed on the upper cover. The lower part of the lower discharge pipe is inserted into the corresponding powder feed hole. The bottom end of the lower discharge pipe extends into the protective cover.

[0016] The bottom of the feed hopper is located within the upper raised frame, and the material discharge channel is connected to the upper horizontal feed channel.

[0017] The front and rear side panels of the mixing tank are both outwardly protruding arc-shaped wall panels, and the front and rear parts of the bottom plate of the mixing tank are both downwardly protruding arc-shaped wall panel parts. The bottom surface of the bottom plate of the mixing tank between the two arc-shaped wall panel parts is formed with an upwardly extending elongated groove. The top surface of the elongated groove is an arc-shaped wall surface, and a discharge channel is formed in the middle of it.

[0018] The mixing tank has a transverse rotating shaft at the front and rear between the left and right side plates. The transverse rotating shaft is movably connected to the left and right side plates through bearings. One end of the transverse rotating shaft extends out of the left or right side plate and is fixed with a transmission gear. Multiple stirring arms are fixed on the outer side wall of the transverse rotating shaft. Stirring blades are fixed at the ends of the stirring arms. The stirring blades cooperate with the inner side wall of the front side plate and the top surface of the bottom plate of the corresponding mixing tank.

[0019] Multiple wear-resistant reinforcing plates are fixed on the inner wall of the mixing tank, and all wear-resistant reinforcing plates cover the entire inner wall of the mixing tank.

[0020] A stirring motor and a reduction gearbox are fixed on the top surface of the bottom plate of the main body on one side of the mixing tank. A drive pulley is fixed on the output shaft of the stirring motor, and a transmission pulley is fixed on the input shaft of the reduction gearbox. The transmission belt is tensioned on the drive pulley and the transmission pulley. A drive gear is fixed on each of the two output shafts of the reduction gearbox, and the drive gear meshes with the corresponding transmission gear.

[0021] The top surfaces of the left and right ends of the elongated groove are fixed with side support frames. Two circular end plates are located between the two side support frames. The outer side wall of each circular end plate is close to the corresponding side support frame. The left and right ends of the upper arc-shaped baffle are fixed on the inner side wall of the upper part of the two circular end plates. The top surface of the upper arc-shaped baffle is close to the top surface of the elongated groove and covers the discharge channel.

[0022] A rotating shaft is fixed in the middle of the circular end plate. The rotating shaft is movably connected to the corresponding side support frame through a bearing. A discharge pushing cylinder is movably connected to the top surface of the bottom plate of the main body on one side of the mixing tank. The end of the push rod of the discharge pushing cylinder is movably connected to one end of a rotating arm through a hinge shaft. The other end of the rotating arm is fixed to the end of the corresponding rotating shaft that extends out of the side support frame.

[0023] An asphalt filling tank is placed on the top surface of the bottom plate of the main box. First weighing sensors are fixed on the top surface of the bottom plate of the main box below the four corners of the bottom surface of the asphalt filling tank. The sensing connection parts of the top of the four first weighing sensors are fixed at the four corners of the bottom surface of the asphalt filling tank.

[0024] An asphalt delivery pump is fixed on the top surface of the bottom plate of the main box on one side of the asphalt filling tank. The input pipe of the asphalt delivery pump extends into the asphalt filling tank, and the bottom end of the input pipe is close to the top surface of the bottom plate of the asphalt filling tank.

[0025] The discharge end of the asphalt conveying pump is connected to the discharge pipe, and the discharge end of the discharge pipe is connected to the mixing tank.

[0026] The discharge end of the discharge pipe is connected to the feed end formed or connected to the middle side wall of the distribution pipe. The distribution pipe is located directly above the upper cover plate. Multiple distribution pipes are connected to the bottom plate of the distribution pipe. The lower part of the distribution pipe extends out of the bottom end of the corresponding through hole on the upper cover plate and communicates with the main feed port.

[0027] A dryer is installed in the main housing.

[0028] The dryer is a heat dryer or a drying machine.

[0029] The dryer is a refrigerated dryer. At this time, multiple electric heating plates are fixed on the outer wall of the feed hopper. All electric heating plates cover the outer wall of the feed hopper, thereby ensuring that the temperature of the feed hopper is stable during refrigeration and preventing water droplets from forming on its inner wall.

[0030] The main body is equipped with side doors that can be opened and closed on both the left and right sides.

[0031] A front through groove is formed on the upper part of the front inner sidewall of the central through groove, and the front through groove communicates with the central through groove.

[0032] A front guide plate is fixed to the top surface of the front through groove. A front inclined wall plate extending backward and downward is formed at the rear end of the front guide plate. The upper part of the front wall plate of the feed hopper is below the front inclined wall plate. The upper inner wall surface of the front wall plate of the feed hopper is close to or in close contact with the lower wall surface of the front inclined wall plate.

[0033] The feeding hopper includes four inclined wall panels extending outward and upward in four directions at the top. The side walls of two adjacent inclined wall panels are formed or fixed together. The bottom of the front and rear inclined wall panels are formed with downward inclined extension plates that are close to each other. The bottom of the left and right inclined wall panels are formed with vertical plates extending downward. The left and right side walls of the two lower extension plates are formed or welded to the front and rear side walls of the corresponding two vertical plates to form a lower extension hopper. The middle part of the bottom of the lower extension hopper is a material discharge channel.

[0034] An arc-shaped baffle is provided below the lower extension bucket, which covers the material discharge channel. The top surface of the arc-shaped baffle is close to the bottom end of the lower extension bucket. Side vertical plates are fixed or formed on the left and right sides of the arc-shaped baffle. The side vertical plates are located outside the corresponding vertical plate and are movably connected to the corresponding vertical plate through a hinge shaft.

[0035] A connecting part is fixed in the middle of the rear side wall of the arc-shaped baffle, and a connecting seat is fixed on the upper part of the rear wall of the inclined wall plate at the rear of the feed hopper. The connecting part of the first tilting oil cylinder is movably connected to the connecting seat through a hinge shaft, and the bottom end of the push rod of the first tilting oil cylinder is movably connected to the connecting part through a hinge shaft.

[0036] Side baffles are fixed on both the left and right side walls of the central through groove. The bottom end of the side baffles is formed with a lateral oblique blocking part that extends obliquely towards the center. The upper part of the left and right oblique wall plates of the feed hopper is located below the corresponding lateral oblique blocking part. The upper inner wall surface of the left and right oblique wall plates is close to or in close contact with the lower wall surface of the corresponding lateral oblique blocking part.

[0037] The top surface of the top plate of the main box body on the left and right sides of the central through slot is fixed with front and rear extending guide rails. The upper movable door panel is above the two guide rails and corresponds to the central through slot. Multiple pulleys are installed on the bottom surface of the left and right sides of the upper movable door panel. The pulleys are installed in the corresponding guide rails. A rear baffle is fixed on the front wall of the upper movable door panel. The bottom end of the rear baffle is formed with a rear oblique extension that extends forward and downward. The upper part of the oblique wall panel behind the feed hopper is below the rear oblique extension. The upper inner wall surface of the oblique wall panel behind the feed hopper is close to or in close contact with the lower wall surface of the rear oblique extension.

[0038] The bottom surface of the front end of the upper movable door panel is formed or fixed with a vertical connecting plate. The bottom surface of the top plate of the main box behind the central through groove is fixed with a fixed seat. The horizontal pushing cylinder is fixed on the fixed seat, and the end of the push rod of the horizontal pushing cylinder is connected to the vertical connecting plate.

[0039] The upper movable door panel can be moved as needed. When the hopper is not in use, it can cover the central through slot and the rear baffle can cover the front through slot, making it difficult for external objects to enter the hopper and ensuring the normal use of the hopper. When feeding is required, the upper movable door panel can be moved backward to allow normal feeding.

[0040] The outstanding effects of this invention are:

[0041] It dries the air in the main chamber, ensuring that there is virtually no water during mixing, thus guaranteeing the mixing effect. Furthermore, it directly senses and weighs the aggregate after it is poured into the feed hopper, ensuring accurate feeding volume and eliminating the need for separate weighing before feeding, reducing pre-feeding operations. Simultaneously, it first pours asphalt into an asphalt filling tank, then transports it to the mixing tank via an asphalt delivery pump, enabling continuous conveying. The asphalt filling tank automatically weighs the incoming asphalt, eliminating the need for pre-weighing and improving feeding efficiency and effectiveness.

[0042] Furthermore, when not in use, the upper movable door panel can be moved forward to cover the central channel, preventing external materials from entering and ensuring that there are no other debris in the feed hopper, thus guaranteeing normal use in the future. Attached Figure Description

[0043] Figure 1 This is a partial structural schematic diagram of the present invention;

[0044] Figure 2 This is a partial side view of the feed hopper of the present invention;

[0045] Figure 3 This is a partial cross-sectional view of the feed hopper of the present invention;

[0046] Figure 4 This is a partial structural diagram of the feed hopper;

[0047] Figure 5 yes Figure 4 A schematic diagram of the local structure from a different angle;

[0048] Figure 6 yes Figure 1 A magnified view of a portion of the image;

[0049] Figure 7 This is a partial structural diagram of the present invention with the main housing removed;

[0050] Figure 8 This is a partial structural diagram of the present invention with the side door removed;

[0051] Figure 9 This is a partial structural schematic diagram of the present invention;

[0052] Figure 10This is a cross-sectional view of the present invention;

[0053] Figure 11 yes Figure 10 A magnified view of a portion of the image;

[0054] Figure 12 This is a partial structural diagram of the mixing tank;

[0055] Figure 13 It is a partial structural diagram of the components such as the mixing tank, asphalt filling tank, asphalt delivery pump and main housing;

[0056] Figure 14 yes Figure 13 A partial structural diagram of the main housing has been removed.

[0057] Figure 15 yes Figure 14 A schematic diagram of the local structure from a different angle;

[0058] Figure 16 This is a partial cross-sectional view of the mixing tank;

[0059] Figure 17 This is a partial cross-sectional view of the mixing tank of the present invention. Detailed Implementation

[0060] For example, see below. Figures 1 to 17 As shown, a mobile asphalt mixing plant for low-temperature asphalt mixing includes a main body 10. A central through groove 11 is formed in the middle of the top plate of the main body 10. The feed hopper 20 is located directly below the central through groove 11 and is located in the main body 10. Connecting support seats 21 are fixed to the front and rear parts of the bottom center of the left and right side plates of the feed hopper 20. A weighing sensor 22 is installed on the bottom surface of the connecting support seat 21 (the bottom surface of the connecting support seat 21 is fixed to the top connector of the weighing sensor 22. The weighing sensor 22 in this embodiment is a product that can be directly purchased from the market and will not be described in detail here). The base of the weighing sensor 22 is fixed to the top surface of the corresponding transverse beam fixed in the main body 10. The front and rear ends of the transverse beam are fixed to the inner sidewalls of the corresponding parts of the support frame at the front and rear of the main body 10.

[0061] An asphalt filling tank 30 is placed on the top surface of the bottom plate of the main box 10. First weighing sensors 31 are fixed on the top surface of the bottom plate of the main box 10 below the four corners of the bottom surface of the asphalt filling tank 30. The sensing connection parts of the top of the four first weighing sensors 31 are fixed at the four corners of the bottom surface of the asphalt filling tank 30.

[0062] An asphalt delivery pump 40 is fixed on the top surface of the bottom plate of the main box 10 on one side of the asphalt filling tank 30. The input pipe 41 of the asphalt delivery pump 40 extends into the asphalt filling tank 30, and the bottom end of the input pipe 41 is close to the top surface of the bottom plate of the asphalt filling tank 30.

[0063] The discharge end of the asphalt delivery pump 40 is connected to the discharge pipe 42. A mixing tank 50 is fixed on the top surface of the bottom plate of the main housing 10 on one side of the asphalt delivery pump 40, and the discharge end of the discharge pipe 42 is connected to the mixing tank 50. A second asphalt delivery pump 80 is fixed on the top surface of the bottom plate of the main housing 10 on another side of the asphalt filling tank 30. The discharge port of the second asphalt delivery pump 80 is connected to the discharge pipe, and the discharge end of the discharge pipe extends into the asphalt filling tank 30. The inlet of the second asphalt delivery pump 80 is connected to the asphalt main feed pipe. The asphalt main feed pipe extends out of a through hole formed on one side plate of the main housing 10, which can communicate with the external asphalt tank. At the same time, an elastic sealing ring or other means can be fixed between the inner wall of the asphalt main feed pipe and the through hole to improve the sealing performance. The discharge pipe and the asphalt main feed pipe are omitted in the attached drawings.

[0064] The top plate of the mixing tank 50 has a main feed inlet 51 formed in the middle, and the discharge channel 25 of the feed hopper 20 is located directly above the main feed inlet 51.

[0065] The first weighing sensor 31, the asphalt delivery pump 40, and the second asphalt delivery pump 80 are all electrically connected to the control host in the control cabinet via electrical connection cables. The control host controls their operation. The control cabinet is fixed to the top surface of the base plate of the main housing 10. An external connecting pipe is connected to one side panel of the control cabinet. The outer end of the external connecting pipe connects to the air inlet of a ventilation fan (a conventional component, therefore omitted from the attached drawing) fixed to the inner wall of one side panel of the main housing 10. The air outlet of the ventilation fan connects to a through-slot on this side panel. A bottom through-hole is formed on the base plate of the control cabinet, which connects to and aligns with the bottom through-hole formed on the base plate of the main housing 10. This structure allows external air to enter the control cabinet through the bottom through-hole, exchange heat with the internal components, and then exit through the external connecting pipe from the through-slot on the side panel of the main housing 10, thus cooling the electrical components such as the control host in the control cabinet. A filter housing 90 is fixed to the bottom surface of the base plate of the main housing 10 at the bottom through hole. A rearwardly extending placement cavity is formed in the center of the front end face of the filter housing 90. The placement cavity communicates with the central flow grooves on the top and bottom plates of the filter housing 90. The upper central flow groove communicates with the bottom through hole. Protruding strips extending forward and backward are formed in the center of the left and right side walls of the placement cavity. Guide grooves extending forward and backward are formed in the center of the outer side walls of the left and right side plates of the filter cotton block 91. The protruding strips are inserted into the corresponding guide grooves. The filter cotton block 91 fills the entire placement cavity. The center of the filter cotton block 91 is filter cotton. Four side plates are fixed to its four side walls (left, right, front, and back). The filter cotton of the filter cotton block 91 communicates with the upper and lower central flow grooves. The filter cotton block 91 can filter the intake air, preventing external impurities from entering the control box. Meanwhile, a rearwardly extending placement cavity is formed on the upper and lower parts of the left side plate of the filter housing 90. The filter housing 90 has a side through hole, which corresponds to and is aligned with the positioning recess on the outer side of the corresponding side plate of the filter cotton block 91. The upper and lower parts of the outer side wall of the left side plate of the filter housing 90 are fixed with positioning sleeves 92. A limit plate is fixed on the left end face of the positioning sleeve 92. The inner diameter of the middle through hole of the limit plate is smaller than the inner diameter of the middle through hole of the positioning sleeve 92. The positioning rod 93 is inserted into the middle through hole of the limit plate and the middle through hole of the positioning sleeve 92. The inner end of the positioning rod 93 is inserted into the corresponding side through hole and positioning recess. An annular plate is fixed on the middle outer side wall of the positioning rod 93. The right side wall of the annular plate is pressed against the outer side wall of the left side plate of the filter housing 90. The left end of the positioning rod 93 extends out of the left end of the middle through hole of the limit plate and is fixed with a gripping part. A buffer spring is inserted in the middle of the positioning rod 93. One end of the buffer spring is applied to the left side wall of the annular plate, and the other end of the buffer spring is applied to the inner end face of the limit plate.

[0066] When loading and unloading the filter cotton block 91, the front end plate of the filter housing 90 is removed (it is fixed with bolts). Simply pull the two positioning rods 93 so that their inner ends move out of the corresponding positioning recesses, and the filter cotton block 91 can be moved out from the front. During installation, simply pull the positioning rods 93 so that their inner ends are in the corresponding side through holes, and the filter cotton block 91 can be inserted into the placement cavity to complete the installation. Release the grip, and the buffer spring will reset so that the inner ends of the positioning rods 93 extend into the corresponding positioning recesses to complete the fixation. At this time, the filter cotton block 91 will not fall off.

[0067] In this embodiment, the control program in the control host of the control cabinet can be set with maximum and minimum feed rates. During operation, external asphalt is first pumped into the asphalt filling tank 30 via the second asphalt delivery pump 80. At this time, the four first weighing sensors 31 detect the weight and transmit the signals to the control host in the control cabinet. When the weight reaches the maximum value, the control host in the control cabinet stops the second asphalt delivery pump 80 and then controls the asphalt delivery pump 40 to operate, thus delivering the asphalt to the mixing tank 50. When the four first weighing sensors 31 detect the minimum weight, it indicates that additional material needs to be added. At this time, the control host in the control cabinet can control the second asphalt delivery pump 80 to operate and simultaneously control the asphalt delivery pump 40 to stop. When the maximum weight is reached, the asphalt delivery pump 40 is then controlled to operate again. The conveying pump 40 operates to continue conveying, thus achieving continuous feeding. Simultaneously, the control program in the control host in the control cabinet can accumulate the input asphalt weight for easy statistics. It can weigh the asphalt input into the asphalt filling tank 30 to ensure stable feeding. Moreover, this process basically does not cause asphalt leakage, resulting in good performance. In addition, a liquid level sensor (such as a radar liquid level sensor, which uses non-contact measurement) can be installed on the inner side of the upper end of the asphalt filling tank 30. When the first weighing sensor 31 fails, the liquid level in the asphalt filling tank 30 can be sensed by the liquid level sensor. When it reaches the sensing limit set by the liquid level sensor, its sensing signal is sent to the control host in the control cabinet. The control host in the control cabinet then controls the external asphalt conveying device to stop operating to prevent overfeeding.

[0068] Furthermore, at least one powder conveying device 60 is installed in the main housing 10 on one side of the feed hopper 20. The bottom surface of the conveying pipe 61 of the powder conveying device 60 is connected to a lower discharge pipe 62, and the bottom end of the lower discharge pipe 62 is connected to the mixing tank 50.

[0069] In this embodiment, two powder conveying devices 60 are installed. Each powder conveying device 60 includes a main frame 63. A powder placement box 64 is fixed to the top of the main frame 63. The bottom ends of the four legs of the main frame 63 are fixed to the top mounting components of the corresponding second weighing sensors 65. The base of the second weighing sensors 65 is fixed to the top surface of the corresponding transverse beam fixed inside the main housing 10. A conveying pipe 61 is fixed to the bottom of the powder placement box 64. A screw conveying shaft is installed inside the conveying pipe 61. The two ends of the screw conveying shaft are movably connected to the conveying pipe 61 through bearings. The bottom outlet of the powder placement box 64 communicates with the feed through hole on the top plate of the conveying pipe 61. A drive motor (electrically connected to the control host through an electrical connection wire) is fixed to the outer end of the conveying pipe 61. The output shaft of the drive motor is fixed to the screw conveying shaft and drives the screw conveying shaft to rotate. The bottom surface of the inner end of the conveying pipe 61 is connected to a lower discharge pipe 62, the bottom end of which is connected to the mixing tank 5. In operation, the powder storage box 64 can hold a powder feed pipe. The outer end of the powder feed pipe extends out of the corresponding side plate of the main box 10 and connects to the discharge port of the screw conveyor on the external powder bucket. The powder can be transported to the powder storage box 64 by the external screw conveyor. The second weighing sensor 65 can sense its weight. Its principle is the same as the pressure control at the asphalt filling tank 30. When the weight reaches the highest value set by the second weighing sensor 65, the control host in the control cabinet controls the external screw conveyor to stop conveying. Then, it controls the drive motor of the powder conveying device 60 to run, thereby conveying the powder in the powder storage box 64 to the mixing tank 50. When the four second weighing sensors 65 sense that the weight has reached the minimum value, it means that material needs to be added. At this time, the control host in the control cabinet can control the external screw conveyor to continue conveying, thereby achieving continuous feeding.

[0070] Furthermore, a protective cover 52 is fixed to the top edge of the top plate of the mixing tank 50, and an upper cover plate 53 is fixed to the top surface of the protective cover 52. An upper transverse feed channel 531 extending to the left and right is formed in the middle of the upper cover plate 53. An upper protruding frame extending upward is formed on the top surface of the upper cover plate 53 at the four sides of the upper transverse feed channel 531. The upper transverse feed channel 531 communicates with the main feed port 51. At least one powder feed hole 539 is formed on the upper cover plate 53. The lower part of the lower discharge pipe 62 is inserted into the corresponding powder feed hole 539, and the bottom end of the lower discharge pipe 62 extends into the protective cover 52.

[0071] The bottom of the feed hopper 20 is located in the upper raised frame, and the discharge channel 25 is connected to the upper horizontal feed channel 531.

[0072] The front and rear side panels of the mixing tank 50 are both outwardly protruding arc-shaped wall panels, and the front and rear parts of the bottom plate of the mixing tank 50 are both downwardly protruding arc-shaped wall panel parts. The bottom surface of the bottom plate of the mixing tank 50 between the two arc-shaped wall panel parts is formed with an upwardly extending elongated groove. The top surface of the elongated groove is an arc-shaped wall surface, and a discharge channel 54 is formed in the middle of it.

[0073] A transverse rotating shaft 501 is provided at the front and rear of the left and right sides of the mixing tank 50. The transverse rotating shaft 501 is movably connected to the left and right sides of the mixing tank 50 by bearings. One end of the transverse rotating shaft 501 extends out of the left or right side of the mixing tank and is fixed with a transmission gear 502. Multiple stirring arms 503 are fixed on the outer side wall of the transverse rotating shaft 501. Stirring blades 504 are fixed at the ends of the stirring arms 503. The stirring blades 504 cooperate with the inner side wall of the front side plate and the top surface of the bottom plate of the corresponding mixing tank 50.

[0074] Multiple wear-resistant reinforcing plates 505 are fixed on the inner sidewall of the mixing tank 50, and all wear-resistant reinforcing plates 505 cover all the inner sidewalls of the mixing tank 50.

[0075] A stirring motor 70 and a reduction gearbox 71 are fixed on the top surface of the bottom plate of the main housing 10 on one side of the mixing tank 50. A drive pulley 72 is fixed on the output shaft of the stirring motor 70, and a transmission pulley 73 is fixed on the input shaft of the reduction gearbox 71. A transmission belt (not shown in the attached diagram) is tensioned on the drive pulley 72 and the transmission pulley 73. A drive gear 74 is fixed on each of the two output shafts of the reduction gearbox 71, and the drive gear 74 meshes with the corresponding transmission gear 502. When the stirring motor 70 operates, the drive gear 74 of the reduction gearbox 71 drives the corresponding transmission gear 502 to rotate, thereby stirring the material in the mixing tank 50.

[0076] Side support frames 55 are fixed to the top surfaces of both ends of the elongated groove. Two circular end plates 56 are located between the two side support frames 55. The outer side wall of each circular end plate 56 is close to the corresponding side support frame 55. The left and right ends of the upper arc-shaped baffle plate 57 are fixed to the inner side walls of the upper part of the two circular end plates 56. The top surface of the upper arc-shaped baffle plate 57 is close to the top surface of the elongated groove and covers the discharge channel 54. A transverse reinforcing rod is fixed between the lower parts of the two circular end plates 56. The two ends of the transverse reinforcing rod are fixed to the inner side walls of the lower part of the two circular end plates 56.

[0077] A rotating shaft 561 is fixed in the middle of the circular end plate 56. The rotating shaft 561 is movably connected to the corresponding side support frame 55 through a bearing. A discharge pushing cylinder 58 is movably connected to the top surface of the bottom plate of the main box body on one side of the mixing tank 50. The end of the push rod of the discharge pushing cylinder 58 is movably connected to one end of the rotating arm 59 through a hinge shaft. The other end of the rotating arm 59 is fixed to the end of the corresponding rotating shaft 561 that extends out of the side support frame 55.

[0078] The rotating arm 59 is an arc-shaped rotating arm.

[0079] The discharge end of the discharge pipe 42 is connected to the feed end formed or connected to the middle side wall of the distribution pipe 43. The distribution pipe 43 is located directly above the upper cover plate 53. Multiple branch discharge pipes 431 are connected to the bottom plate of the distribution pipe 43. The lower part of the branch discharge pipe 431 extends out of the bottom end of the corresponding through hole on the upper cover plate 53 and communicates with the main feed port 51. The branch discharge pipes 431 make the asphalt feed into the mixing tank 50 uniform, improving the uniformity of subsequent mixing.

[0080] After the material in the mixing tank 50 is mixed, the upper arc-shaped baffle 57 can be flipped by the push rod of the discharge cylinder 58, so that it no longer covers the discharge channel 54, and the mixed material can come out from the discharge channel 54. Finally, it comes out from the lower discharge channel on the bottom plate of the main box 10. A receiving tray or other material can be placed below it for receiving the material, which is very convenient.

[0081] The discharge-driven hydraulic cylinder 58 is connected to the corresponding solenoid valve of the hydraulic system via a connecting pipe. Its operation is controlled by the hydraulic system, which in turn is controlled by the main control unit. Both are conventional structures and will not be described in detail here.

[0082] In this embodiment, asphalt can be first poured into asphalt filling tank 30, and then transported to mixing tank 50 by asphalt delivery pump 40. This can achieve continuous transportation, and the asphalt filling tank 30 can automatically weigh the incoming asphalt, eliminating the previous weighing process and improving feeding efficiency and effect.

[0083] Furthermore, a dryer 800 is installed in the main housing 10. Side doors that can be opened and closed are installed on the left and right sides of the main housing 10. During use, the side doors on both sides of the main housing 10 are closed, isolating the internal cavity of the main housing 10 from the external environment. The dryer 800 dries and dehumidifies the air inside the main housing 10, ensuring that minimal water is mixed into the materials during mixing, thus guaranteeing effective mixing.

[0084] Meanwhile, temperature and humidity sensors need to be installed on the inner wall of the main enclosure 10 to monitor the temperature and humidity inside the main enclosure 10 at all times. The temperature and humidity sensors are electrically connected to the control host via electrical connection wires (temperature and humidity sensors are omitted in the attached figure).

[0085] The dryer 800 can be a heat dryer or a drying machine. When it is heat drying, if the temperature is too high, the dryer 800 can be stopped by controlling the main unit to prevent the temperature from getting too high (to ensure the normal operation of various electronic and electrical equipment). When heat drying, if the temperature is too high, the humidity will definitely be low.

[0086] When the dryer 800 is a refrigerated dryer, multiple electric heating plates need to be fixed on the outer wall of the feed hopper 20. All electric heating plates cover the outer wall of the feed hopper 20 to ensure that the temperature of the feed hopper 20 is stable during refrigerated drying and to prevent water droplets from forming on its inner wall.

[0087] Furthermore, the upper part of the front inner side wall of the central through groove 11 of the main housing 10 is formed with a front through groove 111, which is connected to the central through groove 11.

[0088] A front guide plate 112 is fixed to the top surface of the front through groove 111. The rear end of the front guide plate 112 is formed with a front inclined wall plate 113 extending backward and downward. The upper part of the front wall plate of the feed hopper 20 is below the front inclined wall plate 113. The upper inner wall surface of the front wall plate of the feed hopper 20 is close to or in close contact with the lower wall surface of the front inclined wall plate 113. The front wall plate is the inclined wall plate 29 at the front of the feed hopper 20.

[0089] Furthermore, the feed hopper 20 includes four inclined wall panels 29 extending outward and upward in four directions at the top. The side walls of two adjacent inclined wall panels 29 are formed or fixed together (the two are sealed together, i.e., there are no gaps or voids at the connection). The bottom of the front and rear inclined wall panels 29 are formed with downwardly inclined and approaching lower extension plate portions 23. The bottom of the left and right inclined wall panels 29 are formed with vertically extending vertical plate portions 24. The left and right side walls of the two lower extension plate portions 23 are formed or welded to the front and rear side walls of the corresponding two vertical plate portions 24 to form a lower extension hopper portion (the side walls connecting the lower extension plate portions 23 and the vertical plate portions 24 are sealed together, i.e., there are no gaps or voids at the connection). The middle part of the bottom of the lower extension hopper portion is a material discharge channel 25. The lower part of the lower extension hopper portion is located in the upper raised frame.

[0090] An arc-shaped baffle 26 is provided below the lower extension bucket, covering the material discharge channel 25. The arc-shaped baffle 26 is also located in the upper raised frame. The top surface of the arc-shaped baffle 26 is close to the bottom end of the lower extension bucket (since the bottom ends of the two vertical plate parts 24 are arc-shaped end faces, the arc-shaped baffle 26 cooperates with the bottom ends of the vertical plate parts 24). A brush layer (not shown in the figure) can be fixed on the top surface of the four sides of the arc-shaped baffle 26 to further improve the sealing effect. Side vertical plates 261 are fixed or formed on the left and right sides of the arc-shaped baffle 26. The side vertical plates 261 are located on the outside of the corresponding vertical plate parts 24 and are movably connected to the corresponding vertical plate parts 24 through a hinge shaft.

[0091] Furthermore, a connecting part 262 is fixed in the middle of the rear side wall of the arc-shaped baffle 26, and a connecting seat 263 is fixed in the upper part of the rear wall surface of the inclined wall plate 29 at the rear of the feed hopper 20. The connecting part of the first tilting cylinder 264 is movably connected to the connecting seat 263 through a hinge shaft, and the bottom end of the push rod of the first tilting cylinder 264 is movably connected to the connecting part 262 through a hinge shaft.

[0092] Furthermore, side baffles 114 are fixed on both the left and right side walls of the central through groove 11. The bottom end of the side baffles 114 is formed with a side oblique blocking part 115 extending obliquely towards the center. The upper part of the two oblique wall plates 29 of the feed hopper 20 is located below the corresponding side oblique blocking part 115. The upper inner wall surface of the two oblique wall plates 29 is close to or in close contact with the lower wall surface of the corresponding side oblique blocking part 115.

[0093] The top surface of the top plate of the main box 10 on the left and right sides of the central through groove 11 is fixed with front and rear extending guide rails 12. The upper movable door panel 13 is above the two guide rails 12 and corresponds to the central through groove 11. Multiple pulleys 14 are installed on the bottom surface of the left and right sides of the upper movable door panel 13. The pulleys 14 are installed in the corresponding guide rails 12. A rear baffle 141 is fixed on the front wall of the upper movable door panel 13. The bottom end of the rear baffle 141 is formed with a rear oblique extension 142 that extends forward and downward. The upper part of the oblique wall panel behind the feed hopper 20 is below the rear oblique extension 142. The top of the oblique wall panel behind the feed hopper 20 is close to or in close contact with the bottom surface of the rear oblique extension 142.

[0094] The bottom surface of the front end of the upper movable door panel 13 is formed or fixed with a vertical connecting plate 143. The bottom surface of the top plate of the main box 10 behind the central through groove 11 is fixed with a fixed seat. The horizontal pushing cylinder 144 is fixed on the fixed seat. The end of the push rod of the horizontal pushing cylinder 144 is movably connected to the vertical connecting plate 143 through a hinge shaft.

[0095] When the feed hopper 20 is not feeding material and is not in use, the push rod of the horizontally pushing cylinder 144 can be used to push the upper moving door panel 13 forward to cover the central through groove 11. When it moves, it moves along the corresponding guide rail 12 through the pulley 14 to reduce friction and ensure normal pushing.

[0096] When in use, the front guide plate 112, side baffle 114 and rear baffle 141 cooperate with the top of the feed hopper 20 to ensure that the stone material entering the feed hopper 20 is not easily leaked out.

[0097] After the stone enters the feeding hopper 20, its weight can be sensed by four weighing sensors 22 (the weighing sensors 22 are electrically connected to the control host in the control cabinet via electrical connection wires. The amount of stone to be placed can be set by the control program in the control host in the control cabinet. When the stone in the feeding hopper 20 reaches the set weight value, the corresponding indicator light can be lit by the control host in the control cabinet. The indicator light can be installed on the outer wall of the main box 10 to indicate that the quantity has been reached and the feeding can be stopped. The control host and indicator lights in this control cabinet are conventional structures and will not be described in detail here, nor are they shown in the attached figure), ensuring the accuracy of feeding;

[0098] Once the material discharge reaches the set value, the push rod of the first tilting cylinder 264 can retract, causing the arc-shaped baffle 26 to tilt and open. The stone material in the feed hopper 20 can then fall from the discharge chute 25 into the mixing tank 50. Simultaneously, the drive motors of the two powder conveying devices 60 operate, transporting the powder material into the mixing tank 50. The asphalt conveying pump 40 operates, transporting the asphalt material into the mixing tank 50. Then, the mixing motor 70 operates, causing the transverse rotating shaft 501 to rotate, which in turn causes the mixing arm 503 and the mixing blade 504 to rotate and mix the material in the mixing tank 50. After mixing is complete, the push rod of the discharge pushing cylinder 58 can be used to tilt the upper arc-shaped baffle 57, removing it from the discharge chute 54. The mixed material can then exit from the discharge chute 54 and finally exit from the lower discharge chute on the bottom plate of the main body 10. A receiving tray or similar device can be placed below the discharge chute for easy material collection.

[0099] During the feeding process, the four weighing sensors 22 can sense the gradual decrease in weight until they sense the initial value (i.e., the value of no stone). At this point, the corresponding indicator light can be lit by the control host in the control cabinet, indicating that feeding can continue in the feeding hopper 20. At the same time, the control host in the control cabinet controls the operation of the electronic control valve of the hydraulic system (which is a conventional hydraulic system, consisting of a hydraulic pump, hydraulic oil tank, and control valve connected to the first tilting cylinder 264 and the lateral pushing cylinder 144 through connecting pipes to realize operation, which will not be described in detail here. The hydraulic system is fixed on the top surface of the bottom plate of the main box 10). It can control the push rod of the first tilting cylinder 264 to push, so that the arc-shaped baffle 26 tilts back to cover the material drop channel 25, and feeding can continue, which is very convenient.

Claims

1. A mobile asphalt mixing plant for low-temperature asphalt mixing, comprising a main casing (10), characterized in that: The top plate of the main box (10) has a central through groove (11) formed in the middle. The feed hopper (20) is located directly below the central through groove (11). The feed hopper (20) is located in the main box (10). The front and rear parts of the bottom surface of the left and right side plates of the feed hopper (20) are fixed with connecting support seats (21). The bottom surface of the connecting support seat (21) is equipped with a weighing sensor (22). The base of the weighing sensor (22) is fixed on the top surface of the corresponding transverse beam fixed in the main box (10). An asphalt filling tank (30) is placed on the top surface of the bottom plate of the main box (10). A first weighing sensor (31) is fixed on the top surface of the bottom plate of the main box (10) below the four corners of the bottom surface of the asphalt filling tank (30). The sensing connection parts of the top of the four first weighing sensors (31) are fixed at the four corners of the bottom surface of the asphalt filling tank (30). An asphalt delivery pump (40) is fixed on the top surface of the bottom plate of the main box (10) on one side of the asphalt filling tank (30). The input pipe (41) of the asphalt delivery pump (40) extends into the asphalt filling tank (30), and the bottom end of the input pipe (41) is close to the top surface of the bottom plate of the asphalt filling tank (30). The discharge end of the asphalt conveying pump (40) is connected to the discharge pipe (42). A mixing tank (50) is fixed on the top surface of the bottom plate of the main box (10) on one side of the asphalt conveying pump (40). The discharge end of the discharge pipe (42) is connected to the mixing tank (50). The top plate of the mixing tank (50) has a main feed inlet (51) formed in the middle, and the discharge channel (25) of the feed hopper (20) is located directly above the main feed inlet (51).

2. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 1, characterized in that: At least one powder conveying device (60) is installed in the main box (10) on one side of the feed hopper (20). The bottom surface of the conveying pipe (61) of the powder conveying device (60) is connected to the lower discharge pipe (62), and the bottom end of the lower discharge pipe (62) is connected to the mixing tank (50).

3. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 2, characterized in that: The top edge of the top plate of the mixing tank (50) is fixed with a protective cover (52), and the top surface of the protective cover (52) is fixed with an upper cover plate (53). The middle part of the upper cover plate (53) is formed with an upper transverse feed channel (531) extending to the left and right. The top surface of the upper cover plate (53) at the four sides of the upper transverse feed channel (531) is formed with an upper protruding frame extending upward. The upper transverse feed channel (531) is connected to the main feed port (51). At least one powder feed hole (539) is formed on the upper cover plate (53). The lower part of the lower discharge pipe (62) is inserted into the corresponding powder feed hole (539), and the bottom end of the lower discharge pipe (62) extends into the protective cover (52). The bottom of the feed hopper (20) is located in the upper raised frame, and the discharge channel (25) is connected to the upper horizontal feed channel (531).

4. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 1, characterized in that: The front and rear side panels of the mixing tank (50) are both outwardly protruding arc-shaped wall panels. The front and rear parts of the bottom plate of the mixing tank (50) are both downwardly protruding arc-shaped wall panel parts. The bottom surface of the bottom plate of the mixing tank (50) between the two arc-shaped wall panel parts is formed with an upwardly extending elongated groove. The top surface of the elongated groove is an arc-shaped wall surface, and a discharge channel (54) is formed in the middle of it. The mixing tank (50) has a transverse rotating shaft (501) at the front and rear of the left and right sides. The transverse rotating shaft (501) is movably connected to the left and right sides via bearings. One end of the transverse rotating shaft (501) extends out of the left or right side and is fixed with a transmission gear (502). Multiple stirring arms (503) are fixed on the outer side wall of the transverse rotating shaft (501). Stirring blades (504) are fixed at the ends of the stirring arms (503). The stirring blades (504) cooperate with the inner side wall of the front side plate and the top surface of the bottom plate of the corresponding mixing tank (50).

5. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 4, characterized in that: Multiple wear-resistant reinforcing plates (505) are fixed on the inner sidewall of the mixing tank (50), and all wear-resistant reinforcing plates (505) cover all the inner sidewalls of the mixing tank (50).

6. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 4, characterized in that: A stirring motor (70) and a reduction gearbox (71) are fixed on the top surface of the bottom plate of the main body (10) on one side of the mixing tank (50). A drive pulley (72) is fixed on the output shaft of the stirring motor (70), and a transmission pulley (73) is fixed on the input shaft of the reduction gearbox (71). The transmission belt is tensioned on the drive pulley (72) and the transmission pulley (73). A drive gear (74) is fixed on each of the two output shafts of the reduction gearbox (71). The drive gear (74) meshes with the corresponding transmission gear (502).

7. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 4, characterized in that: The top surfaces of the left and right ends of the elongated groove are fixed with side support frames (55), and two circular end plates (56) are located between the two side support frames (55). The outer side wall of each circular end plate (56) is close to the corresponding side support frame (55). The left and right ends of the upper arc-shaped baffle plate (57) are fixed on the inner side wall of the upper part of the two circular end plates (56). The top surface of the upper arc-shaped baffle plate (57) is close to the top surface of the elongated groove and covers the discharge channel (54). A rotating shaft (561) is fixed in the middle of the circular end plate (56). The rotating shaft (561) is movably connected to the corresponding side support frame (55) through a bearing. A discharge pushing cylinder (58) is movably connected to the top surface of the bottom plate of the main box body on one side of the mixing tank (50). The end of the push rod of the discharge pushing cylinder (58) is movably connected to one end of a rotating arm (59) through a hinge shaft. The other end of the rotating arm (59) is fixed to one end of the corresponding rotating shaft (561) extending out of the side support frame (55). The rotating arm (59) is an arc-shaped rotating arm.

8. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 3, characterized in that: An asphalt filling tank (30) is placed on the top surface of the bottom plate of the main box (10). A first weighing sensor (31) is fixed on the top surface of the bottom plate of the main box (10) below the four corners of the bottom surface of the asphalt filling tank (30). The sensing connection parts of the top of the four first weighing sensors (31) are fixed at the four corners of the bottom surface of the asphalt filling tank (30). An asphalt delivery pump (40) is fixed on the top surface of the bottom plate of the main box (10) on one side of the asphalt filling tank (30). The input pipe (41) of the asphalt delivery pump (40) extends into the asphalt filling tank (30), and the bottom end of the input pipe (41) is close to the top surface of the bottom plate of the asphalt filling tank (30). The discharge end of the asphalt delivery pump (40) is connected to the discharge pipe (42), and the discharge end of the discharge pipe (42) is connected to the mixing tank (50).

9. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 8, characterized in that: The discharge end of the discharge pipe (42) is connected to the feed end formed or connected on the middle side wall of the distribution pipe (43). The distribution pipe (43) is located directly above the upper cover plate (53). Multiple distribution pipes (431) are connected to the bottom plate of the distribution pipe (43). The lower part of the distribution pipe (431) extends out of the bottom end of the corresponding through hole on the upper cover plate (53) and communicates with the main feed port (51).

10. A mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 1, characterized in that: A dryer (800) is installed in the main housing (10); The dryer (800) is a heat dryer or a drying machine; The dryer (800) is a cold dryer. At this time, multiple electric heating plates are fixed on the outer wall of the feed hopper (20). All electric heating plates cover the outer wall of the feed hopper (20), thereby ensuring that the temperature of the feed hopper (20) is stable during cold drying and preventing water droplets from being generated on its inner wall. The main body (10) is equipped with side doors that can be opened and closed on the left and right sides.

Images