Movable asphalt mixing plant for mixing low-temperature asphalt

Abstract

The movable asphalt mixing plant comprises a main box body, a center through groove is formed in the middle of a top plate of the main box body, a feeding hopper is located under the center through groove and located in the main box body, and connecting supporting seats are fixed to the front portions and the rear portions of the middles of the bottom faces of a left side plate and a right side plate of the feeding hopper correspondingly; and a weighing sensor is mounted on the bottom surface of the connecting support seat. Air in the main box body is dried, it can be guaranteed that water basically does not exist in the stirring process when materials are stirred in the stirring tank, the stirring effect is guaranteed, stone is directly inducted and weighed after being poured into the feeding hopper, the accuracy of the feeding amount is guaranteed, independent weighing before feeding is not needed, operation procedures before feeding are reduced, and meanwhile the production efficiency is improved. Asphalt is firstly poured into the asphalt filling tank and then conveyed into the stirring tank through the asphalt conveying pump, continuous conveying can be achieved, the asphalt filling tank can automatically weigh the entered asphalt, and the early-stage weighing process is omitted.

Description

Technical field:

[0001] The present invention relates to the technical field of asphalt processing equipment, and more particularly to a mobile asphalt mixing station for low-temperature asphalt mixing. Background technology:

[0002] Existing asphalt mixing equipment generally uses high-temperature mixing, that is, the temperature of the asphalt used reaches 150°C to 170°C. When mixing at this temperature, harmful gases in the asphalt are easily volatilized, thereby affecting the surrounding air environment. Therefore, in order to improve environmental protection, cold-mix asphalt is currently used, which only requires asphalt heated to 60°C for mixing. However, this type of asphalt basically cannot be mixed with water, and its ratio control requirements are high. Existing high-temperature asphalt mixing equipment is exposed to the outside for mixing. When the external air humidity is too high, water droplets will form on the surface of the mixing material or the inner wall of the mixing tank, which can easily cause water to mix into the mixing equipment, affecting the mixing effect.

[0003] At the same time, the mixed stones enter the mixing barrel directly from the feed hopper for mixing. The amount of stones cannot be known from the feed hopper. Generally, they are weighed externally before feeding and then poured into the feed hopper. However, between the completion of weighing and the pouring into the feed hopper, some stones may fall from the discharge tray, thereby affecting the actual feed amount, causing errors, affecting the subsequent mixing ratio, and thus affecting the accuracy of the subsequent discharge amount.

[0004] Moreover, it weighs the materials before feeding, which increases the feeding process and the effect is not ideal;

[0005] Similarly, in the existing asphalt mixing equipment, the asphalt used for mixing is directly poured into the mixing tank from the feed port. The feed uniformity is poor, which affects the subsequent mixing effect. In addition, the feed amount cannot be controlled. It can only be poured into the discharge tray after weighing the corresponding weight externally. The asphalt is recessed into the mixing tank through the discharge tray. During the entire process, some asphalt often leaks from the discharge tray during 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 the present invention is to overcome the shortcomings of the existing technology and provide a mobile asphalt mixing station for low-temperature asphalt mixing. It dries the air in the main box and reduces the humidity of the air. It can ensure that when the material is mixed in the mixing tank, there is basically no water in the mixing, thereby ensuring the mixing effect. Moreover, after the stone is poured into the feed hopper, it is directly sensed and weighed to ensure the accuracy of the feed amount. Moreover, it does not need to be weighed separately before feeding, thereby reducing the operation process before feeding. At the same time, it pours the asphalt into the asphalt filling tank first, and then transports it to the mixing tank through the asphalt delivery pump. It can realize continuous transportation, and its asphalt filling tank can automatically weigh the incoming asphalt, eliminating the early weighing process and improving the feeding efficiency and effect.

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

[0009] A mobile asphalt mixing plant for low-temperature asphalt mixing includes a main box body, a central through-slot is formed in the middle of the top plate of the main box body, a feed hopper is located directly below the central through-slot, and the feed hopper is located in the main box body. Connecting support seats are fixed to the front and rear of the middle of the bottom surfaces of the left and right side plates of the feed hopper. A weighing sensor is installed on the bottom surface of the connecting support seat, and the base of the weighing sensor is fixed to the top surface of the corresponding transverse beam fixed in the main box body; the weight of the material discharged in 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 body. First load cells are fixed on the top surface of the bottom plate of the main box body below the four corners of the bottom surface of the asphalt filling tank. The sensing connection parts at the top of the four first load cells 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 delivery 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 delivery pump, and the discharge end of the discharge pipe is connected to the mixing tank;

[0013] A main feed opening is formed in the middle of the top plate of the mixing tank, and the blanking slot of the feed hopper is located right above the main feed opening.

[0014] At least one powder conveying device is installed in the main box at one side of the feed hopper, and the bottom surface of the 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 communicated with the stirring tank.

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

[0016] The bottom of the feed hopper is located in the upper raised frame, and the blanking slot is communicated with the upper transverse feed slot.

[0017] The front side plate and the rear side wall of the mixing tank are both arc-shaped wall plates protruding outward, and the front and rear parts of the bottom plate of the mixing tank are both arc-shaped wall plates protruding downward. The bottom surface of the bottom plate of the mixing tank between the two arc-shaped wall plates is formed with an upwardly extending long groove, and the top surface of the long groove is an arc-shaped wall surface, and a discharge groove is formed in the middle thereof;

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

[0019] A plurality of wear-resistant reinforcement plates are fixed on the inner side wall of the mixing tank, and all the wear-resistant reinforcement plates cover all the inner side walls of the mixing tank.

[0020] A stirring motor and a reduction gear are fixed on the top surface of the bottom plate of the main box on one side of the stirring tank, a driving pulley is fixed on the output shaft of the stirring motor, a transmission pulley is fixed on the input shaft of the reduction gear, the transmission belt is tensioned on the driving pulley and the transmission pulley, and driving gears are fixed on the two output shafts of the reduction gear, and the driving gears are meshed with corresponding transmission gears.

[0021] Side support frames are fixed to the top surfaces of the left and right ends of the elongated groove, and the 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, and the left and right ends of the upper arc-shaped material baffle plate are fixed to the inner side walls of the upper parts of the two circular end plates. The top surface of the upper arc-shaped material baffle plate is in close contact with the top surface of the elongated groove and covers the discharge slot;

[0022] A rotating shaft is fixed to the middle of the circular end plate, and 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 box 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 the rotating arm through a hinge shaft, and the other end of the rotating arm is fixed to one end of the corresponding rotating shaft extending 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 body. First load cells are fixed on the top surface of the bottom plate of the main box body below the four corners of the bottom surface of the asphalt filling tank. The sensing connection parts at the top of the four first load cells 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 delivery pump is connected to the discharge pipe, and the discharge end of the discharge pipe is connected to the stirring tank.

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

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

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

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

[0030] Side doors that can be opened and closed are installed on the left and right sides of the main box body.

[0031] A front through groove is formed on the upper portion of the front inner side wall of the central through groove, and the front through groove is communicated with the central through groove.

[0032] A front guide plate is fixed to the top surface of the front through groove, and a front oblique 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 oblique wall plate, and the upper inner wall surface of the front wall plate of the feed hopper is close to or close to the lower wall surface of the front oblique wall plate.

[0033] The feed hopper includes four upper oblique wall panels extending obliquely outward and upward in four directions. The side walls of two adjacent oblique wall panels among the four oblique wall panels are formed or fixed together. The bottoms of the front and rear oblique wall panels are formed with lower extension plate portions that are obliquely approaching each other downward. The bottoms of the left and right oblique wall panels are formed with vertical plate portions that extend vertically downward. The left and right side walls of the two lower extension plate portions are formed or welded to the front and rear side walls of the corresponding two vertical plate portions to form a lower extension hopper portion. The middle part of the bottom of the lower extension hopper portion is a blanking groove.

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

[0035] A connecting portion is fixed to the middle of the rear side wall of the arc-shaped baffle, a connecting seat is fixed to the upper portion of the rear wall surface of the inclined wall panel at the rear of the feed hopper, the connecting portion of the first flipping cylinder is movably connected to the connecting seat through a hinge shaft, and the bottom end of the push rod of the first flipping cylinder is movably connected to the connecting portion through a hinge shaft.

[0036] Side baffles are fixed on the left and right side walls of the central through groove, and the bottom end of the side baffle is formed with a side oblique blocking part extending obliquely toward the middle. The upper parts of the left and right oblique wall panels of the feed hopper are below the corresponding side oblique blocking parts, and the upper inner wall surfaces of the left and right oblique wall panels are close to or close to the lower wall surfaces of the corresponding side oblique blocking parts.

[0037] Guide rails extending forward and backward are fixed to the top surface of the top plate of the main box body on the left and right sides of the central through slot, and the upper movable door panel is located above the two guide rails and corresponds to the central through slot, and multiple pulleys are installed on the bottom surfaces of the left and right sides of the upper movable door panel, and the pulleys are installed in the corresponding guide rails, and a rear baffle is fixed on the front wall surface of the upper movable door panel, and a rear oblique extension portion is formed at the bottom end of the rear baffle extending obliquely forward and downward, the upper part of the oblique wall panel at the rear of the feed hopper is located below the rear oblique extension portion, and the upper inner wall surface of the oblique wall panel at the rear of the feed hopper is close to or close to the lower wall surface of the rear oblique extension portion.

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

[0039] The movable door panel on it can be moved as needed. When the feed hopper is not in use, it can cover the central slot, and the rear baffle covers the front slot, making it difficult for foreign objects to enter the feed hopper, ensuring the subsequent normal use of the feed hopper. When feeding is needed, the upper movable door panel moves backward and normal feeding can be carried out.

[0040] The outstanding effects of the present invention are:

[0041] It dries the air in the main box, which can ensure that when the materials are mixed in the mixing tank, there is basically no water in the mixing, thus ensuring the mixing effect. After pouring the stone into the feed hopper, it directly senses the weighing to ensure the accuracy of the feed amount. There is no need to weigh it separately before feeding, which reduces the operation procedures before feeding. At the same time, it pours the asphalt into the asphalt filling tank first, and then transports it to the mixing tank through the asphalt delivery pump. It can realize continuous transportation, and its asphalt filling tank can automatically weigh the incoming asphalt, eliminating the early weighing process and improving the feeding efficiency and effect.

[0042] Moreover, when not in use, the upper movable door panel can be moved forward to cover the central slot to prevent external materials from entering, basically ensuring that there are no other debris in the feed hopper and ensuring subsequent normal use. Description of the drawings:

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

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

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

[0046] Figure 4 It is a schematic diagram of the local structure at the feed hopper;

[0047] Figure 5 yes Figure 4 Schematic diagram of the angle-changing local structure;

[0048] Figure 6 yes Figure 1 A partial enlarged view of

[0049] Figure 7 This is a partial structural diagram of the present invention without the main box;

[0050] Figure 8 This is a partial structural diagram of the present invention without the side door body;

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

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

[0053] Figure 11 yes Figure 10 A partial enlarged view of

[0054] Figure 12 It is a schematic diagram of the local structure of the mixing tank;

[0055] Figure 13 It is a schematic diagram of the local structure between the mixing tank, asphalt filling tank, asphalt delivery pump and main box;

[0056] Figure 14 yes Figure 13 Schematic diagram of the partial structure without the main box;

[0057] Figure 15 yes Figure 14 Schematic diagram of the angle-changing local structure;

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

[0059] Figure 17 This is a partial cross-sectional view of the stirring tank of the present invention. Specific implementation method:

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

[0061] An asphalt filling tank 30 is placed on the top surface of the bottom plate of the main box body 10. First load cells 31 are fixed on the top surface of the bottom plate of the main box body 10 below the four corners of the bottom surface of the asphalt filling tank 30. The sensing connection parts of the tops of the four first load cells 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 to the top surface of the bottom plate of the main box 10 on one side of the asphalt filling tank 30. An inlet pipe 41 of the asphalt delivery pump 40 extends into the asphalt filling tank 30, and the bottom end of the inlet 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 box body 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 box body 10 on another side of the asphalt filling tank 30, and 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, and the feed port of the second asphalt delivery pump 80 is connected to the asphalt main feed pipe, which extends out of a through hole formed on one side plate of the main box body 10, which can be communicated with an external asphalt material box. At the same time, an elastic sealing ring can be fixed between the asphalt main feed pipe and the inner side wall of the through hole to improve the sealing performance. The discharge pipe and the asphalt main feed pipe are omitted in the accompanying drawings.

[0064] A main feed opening 51 is formed in the middle of the top plate of the mixing tank 50 , and the material drop groove 25 of the feed hopper 20 is located directly above the main feed opening 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 through electrical connection lines, and are controlled by the control host. The control cabinet is fixed on the top surface of the bottom plate of the main box body 10. An external connecting pipe is connected to one side plate of the control cabinet. The outer end of the external connecting pipe is connected to the air inlet of a ventilation fan (which is a conventional component and is therefore omitted in the drawings) fixed on the inner wall of one side plate of the main box body 10. The air outlet of the ventilation fan is connected to the through slot on this side plate. A lower through hole is formed on the bottom plate of the control cabinet, which is connected to and aligned with the bottom through hole formed on the bottom plate of the main box body 10. In this structure, when the ventilation fan is running, external air enters the control cabinet through the bottom through hole, exchanges heat with the components inside, and is then discharged from the through slot on the side plate of the main box body 10 through the external connecting pipe, thereby cooling and dissipating the electrical components such as the control host in the control cabinet. Among them, a filter housing 90 is fixed on the bottom surface of the bottom plate of the main box body 10 at the bottom through-hole. A placement cavity extending backward is formed in the middle of the front end surface of the filter housing 90. The placement cavity is communicated with the middle flow grooves on the top and bottom plates of the filter housing 90. The upper middle flow groove is communicated with the bottom through-hole. The middle of the left and right side walls of the placement cavity are formed with raised strips extending front and back. The middle of the outer walls of the left and right side plates of the filter cotton block 91 are formed with guide grooves extending front and back. The raised strips are inserted into the corresponding guide grooves. The filter cotton block 91 fills the entire placement cavity. The middle part of the filter cotton block 91 is filter cotton. Four side panels are fixed on its four side walls. The filter cotton of the filter cotton block 91 is communicated with the upper and lower middle flow grooves. The filter cotton block 91 can filter the inhaled air to prevent external impurities from entering the control box. At the same time, the upper and lower parts of the left side plate of the filter housing 90 are formed The filter housing 90 has a side through hole, which corresponds to and is aligned with the positioning recessed holes on the outer side of the corresponding side plate of the filter cotton block 91. A positioning sleeve 92 is fixed to the upper and lower outer wall of the left side plate of the filter housing 90. A limit plate is fixed to the left end surface 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 the positioning recessed hole. An annular plate is fixed on the middle outer wall of the positioning rod 93. The right side wall of the annular plate is pressed against the outer 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 limiting plate and is fixed with a gripping portion. A buffer spring is inserted into 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 surface of the limiting 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). It is only necessary to pull the two positioning rods 93 so that the inner ends thereof are moved out of the corresponding positioning recessed holes, and the filter cotton block 91 can be moved out from the front. During installation, it is only necessary to pull the positioning rod 93 so that the inner ends of the positioning rods 93 are in the corresponding side through holes, and the filter cotton block 91 can be inserted into the placement cavity to complete the installation. The grip is released, and the inner ends of the positioning rods 93 are inserted into the corresponding positioning recessed holes through the reset of the buffer spring to complete the fixation. At this time, the filter cotton block 91 will not fall off.

[0067] In the control program of the control host in the control cabinet of this embodiment, the maximum and minimum values ​​of the feed amount can be set, so that when in use, the external asphalt is first operated through the second asphalt delivery pump 80 to pour the asphalt into the asphalt filling tank 30. At this time, the four first weighing sensors 31 sense the weight and transmit the sensing signal to the control host in the control cabinet. When its weight reaches the maximum value, the control host in the control cabinet controls the second asphalt delivery pump 80 to stop delivering, and then controls the asphalt delivery pump 40 to run, thereby delivering the asphalt to the mixing tank 50. When the four first weighing sensors 31 sense that the weight reaches the minimum value, it indicates that feeding is required. At this time, the control host in the control cabinet can control the second asphalt delivery pump 80 to run, and at the same time, control the asphalt delivery pump 40 to stop running. When it reaches the maximum value, it controls the asphalt delivery pump 40 to stop running. The delivery pump 40 runs and continues to deliver, thereby realizing continuous feeding. At the same time, the control program in the control host in the control cabinet can accumulate the weight of the input asphalt for easy statistics. It can weigh the asphalt input into the asphalt filling tank 30 to ensure stable feeding. In addition, this process basically does not cause the problem of asphalt leakage, and the use effect is good. In addition, when in use, a liquid level sensor (such as a radar liquid level sensor or other sensor, which adopts 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 of 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 transmitted to the control host in the control cabinet, and the control host in the control cabinet controls the external asphalt conveying device to stop running to prevent excessive feeding.

[0068] Furthermore, at least one powder conveying device 60 is installed in the main box 10 at one side of the feed hopper 20, and the bottom surface of the end 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.

[0069] In this embodiment, two powder conveying devices 60 are installed. The powder conveying device 60 includes a main frame 63, and a powder placement box 64 is fixed on the top of the main frame 63. The bottom ends of the four legs of the main frame 63 are fixed on the top mounting components of the corresponding second weighing sensor 65. The base of the second weighing sensor 65 is fixed on the top surface of the corresponding transverse beam fixed inside the main box 10. A conveying pipe 61 is fixed to the bottom of the powder placement box 64, and a screw conveying shaft is installed in the conveying pipe 61. The two ends of the screw conveying shaft are movably connected to the conveying pipe 61 through bearings. The bottom discharge port of the powder placement box 64 is connected to the feed through-hole on the top plate of the conveying pipe 61. A driving motor (which is electrically connected to the control host through an electrical connection line) is fixed at the outer end of the conveying pipe 61. The output shaft of the driving motor is fixed to the screw conveying shaft and drives the screw conveying shaft to rotate, and the bottom surface at the inner end of the conveying pipe 61 is connected to the lower discharge pipe 62, the bottom end of which is connected to the mixing tank 5 0 is connected. When in use, a powder feeding pipe can be placed in the powder placing box 64. The outer end of the powder feeding pipe extends out of the through hole of the corresponding side panel of the main box body 10 and is connected to the discharge port of the screw conveyor on the external powder barrel. The powder can be transported to the powder placing box 64 through the external screw conveyor, and 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 its weight reaches the maximum value set by the second weighing sensor 65, the control host in the control cabinet controls the external screw conveyor to stop conveying, and then controls the driving motor of the powder conveying device 60 to run, so as to transport the powder in the powder placing box 64 to the mixing tank 50. When the four second weighing sensors 65 sense that the weight reaches the minimum value, it indicates that feeding is required. At this time, the control host in the control cabinet can control the external screw conveyor to continue conveying and continue conveying, thereby realizing continuous feeding.

[0070] Furthermore, a protective cover shell 52 is fixed to the top surface of the 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 shell 52. An upper transverse feed slot 531 extending left and right is formed in the middle of the upper cover plate 53. An upper raised frame extending upward is formed on the top surface of the upper cover plate 53 at the side walls around the upper transverse feed slot 531. The upper transverse feed slot 531 is communicated 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 shell 52.

[0071] The bottom of the feed hopper 20 is located in the upper raised frame, and the blanking channel 25 is communicated with the upper transverse feed channel 531 .

[0072] The front side panels and rear side panels of the mixing tank 50 are both outwardly convex curved wall panels, and the front and rear portions of the bottom panel of the mixing tank 50 are both downwardly convex curved wall panels. An upwardly extending elongated groove is formed on the bottom surface of the bottom panel of the mixing tank 50 between the two curved wall panels. The top surface of the elongated groove is an arc-shaped wall surface, and a discharge channel 54 is formed in the middle thereof.

[0073] A transverse rotating shaft 501 is provided at the front and rear between the left and right plates of the mixing tank 50. The transverse rotating shaft 501 is movably connected to the left and right plates through bearings. One end of the transverse rotating shaft 501 extends out of the left or right plate and is fixed with a transmission gear 502. A plurality of stirring arms 503 are fixed on the outer wall of the transverse rotating shaft 501. A stirring paddle 504 is fixed at the end of the stirring arm 503. The stirring paddle 504 cooperates 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] A plurality of wear-resistant reinforcement plates 505 are fixed on the inner side wall of the mixing tank 50 , and all the wear-resistant reinforcement plates 505 cover all the inner side walls of the mixing tank 50 .

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

[0076] Side support frames 55 are fixed to the top surfaces of the left and right ends of the elongated groove, 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, and the left and right ends of the upper arc-shaped material baffle plate 57 are fixed on the inner side walls of the upper part of the two circular end plates 56. The top surface of the upper arc-shaped material baffle plate 57 is close to the top surface of the elongated groove and covers the discharge channel 54; a transverse reinforcement rod is fixed between the lower parts of the two circular end plates 56, and the two ends of the transverse reinforcement rod are fixed on the lower inner side walls of the two circular end plates 56.

[0077] A rotating shaft 561 is fixed to the middle of the circular end plate 56, and 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, and 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, and 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.

[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 on or connected to the middle sidewall of the distribution pipe 43. The distribution pipe 43 is located directly above the upper cover plate 53. A plurality of distribution pipes 431 are connected to the bottom plate of the distribution pipe 43. The lower portions of the distribution pipes 431 extend through the bottom ends of corresponding through-holes in the upper cover plate 53 and communicate with the main feed port 51. The distribution pipes 431 ensure uniform asphalt feeding into the mixing tank 50, improving the uniformity of subsequent mixing.

[0080] When the material in the mixing tank 50 is stirred, the push rod of the discharge cylinder 58 can be pushed to make the upper arc-shaped baffle plate 57 flip over and no longer cover the discharge groove 54, so that the stirred material can be discharged from the discharge groove 54 and finally from the lower discharge groove on the bottom plate of the main box body 10. A receiving tray can be placed below it for receiving materials, which is very convenient.

[0081] This discharge pushing cylinder 58 is connected to the corresponding solenoid valve of the hydraulic system through a connecting pipe, and is controlled by the hydraulic system, and the hydraulic system is controlled by the control host. They are all conventional structures and will not be described in detail here.

[0082] In this embodiment, the asphalt can be poured into the asphalt filling tank 30 first, and then sent to the mixing tank 50 through the asphalt delivery pump 40, which can realize continuous delivery. Moreover, the asphalt filling tank 30 can automatically weigh the incoming asphalt, eliminating the early weighing process and improving the feeding efficiency and effect.

[0083] Furthermore, a dryer 80 is installed in the main housing 10. Openable and closable side doors are installed on the left and right sides of the main housing 10. During use, the left and right side doors of the main housing 10 are closed, isolating the internal cavity of the main housing 10 from the external environment. The operation of the dryer 80 dries and dehumidifies the air within the main housing 10, ensuring that virtually no water is mixed into the material in the main housing 10 during mixing, thereby ensuring a satisfactory mixing effect.

[0084] At the same time, it is necessary to install a temperature sensor and a humidity sensor on the inner wall of the main box 10 so that the temperature and humidity inside the main box 10 can be known at all times. The temperature sensor and humidity sensor are electrically connected to the control host through electrical connecting lines (the temperature sensor and humidity sensor are omitted in the accompanying drawings).

[0085] The dryer 80 may be a heat dryer or a drying machine. When the temperature is too high during heat drying, the host computer may be used to control the dryer 80 to suspend operation to prevent the temperature from being too high (to ensure the normal operation of various electronic and electric devices). When the temperature is too high during heat drying, the humidity is definitely low.

[0086] When the dryer 80 is a cold dryer, multiple electric heating plates need to be fixed on the outer wall of the feed hopper 20, and all the electric heating plates cover the outer wall of the feed hopper 20, so as to ensure that the temperature of the feed hopper 20 is stable during cold drying and prevent water droplets from being generated on its inner wall.

[0087] Furthermore, a front through-slot 111 is formed on the upper portion of the front inner side wall of the central through-slot 11 of the main box body 10 , and the front through-slot 111 is communicated with the central through-slot 11 .

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

[0089] Furthermore, the feed hopper 20 includes four upper oblique wall panels 29 extending obliquely outward and upward in four directions. The side walls of two adjacent oblique wall panels 29 are formed or fixed together (the two are sealed, i.e., there is no gap or space at the connection). The bottoms of the front and rear oblique wall panels 29 are formed with lower extension plate portions 23 that are adjacent to each other in a downward oblique direction. The bottoms of the left and right oblique wall panels 29 are formed with vertical plate portions 24 that extend vertically downward. 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 portion 23 and the vertical plate portion 24 are sealed, i.e., there is no gap or space at the connection). The middle part of the bottom of the lower extension hopper portion is a blanking groove 25. The lower portion of the lower extension hopper portion is located in the upper raised frame.

[0090] An arc-shaped baffle 26 is provided below the lower extending bucket portion, and the arc-shaped baffle 26 covers the blanking groove 25. The arc-shaped baffle 26 is also located in the upper raised frame, and the top surface of the arc-shaped baffle 26 is close to the bottom end of the lower extending bucket portion (because the bottom ends of the two vertical plate portions 24 are arc-shaped end surfaces, the arc-shaped baffle 26 cooperates with the bottom ends of the vertical plate portions 24), wherein a brush layer (not shown in the drawings) can be fixed on the top surfaces of the four side edges of the arc-shaped baffle 26 to further improve the sealing effect, and side vertical plates 261 are fixed or formed on the left and right sides of the arc-shaped baffle 26, and the side vertical plates 261 are located on the outside of the corresponding vertical plate portion 24 and are movably connected to the corresponding vertical plate portion 24 through a hinge shaft;

[0091] Furthermore, a connecting portion 262 is fixed to the middle of the rear side wall of the arc-shaped baffle 26, a connecting seat 263 is fixed to the upper part of the rear wall surface of the inclined wall panel 29 at the rear of the feed hopper 20, the connecting portion of the first flip 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 flip cylinder 264 is movably connected to the connecting portion 262 through a hinge shaft.

[0092] Furthermore, side baffles 114 are fixed on the left and right side walls of the central through groove 11, and the bottom end of the side baffle 114 is formed with a side oblique blocking portion 115 extending obliquely toward the middle. The upper parts of the left and right oblique wall panels 29 of the feed hopper 20 are below the corresponding side oblique blocking portions 115, and the upper inner wall surfaces of the left and right oblique wall panels 29 are close to or tightly attached to the lower wall surfaces of the corresponding side oblique blocking portions 115.

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

[0094] A vertical connecting plate 143 is formed or fixed on the bottom surface of the front end of the upper movable door panel 14, and a fixing seat is fixed on the bottom surface of the top plate of the main box body 10 at the rear of the central through groove 11. The horizontal pushing cylinder 144 is fixed on the fixing seat, and 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 and is not in use, the push rod of the oil cylinder 144 can be pushed horizontally to move the upper movable door panel 14 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 , the side baffle 114 and the rear baffle 141 cooperate with the top of the feed hopper 20 to ensure that the stones entering the feed hopper 20 are not easily leaked out.

[0097] After the stone enters the feed 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 through electrical connecting lines. The placement amount can be set by the control program in the control host in the control cabinet. When the stone in the feed hopper 20 reaches the set weight value, the corresponding indicator light can be controlled by the control host in the control cabinet to light up. The indicator light can be installed on the outer wall of the main box 10 to indicate that the amount has been reached and the discharge can be stopped. The control host and indicator lights in this control cabinet are all conventional structures and will not be described in detail here or shown in the drawings), thereby ensuring the accuracy of the feeding;

[0098] After the material discharge reaches the set value, the push rod of the first turning cylinder 264 can be retracted, so that the arc baffle 26 can be turned open, and the stone in the feed hopper 20 can fall from the drop groove 25 into the mixing tank 50. At the same time, the driving motors of the two powder conveying devices 60 are operated to transport the powder into the mixing tank 50, and the asphalt conveying pump 40 is operated to transport the asphalt into the mixing tank 50. Then, the stirring motor 70 is operated to rotate the horizontal shaft 501, so that the stirring arm 503 and the stirring blade 504 rotate and stir, so that the material in the mixing tank 50 can be stirred and mixed. When the stirring is completed, the push rod of the discharge pushing cylinder 58 can be pushed to make the upper arc baffle 57 turn over and no longer cover the discharge groove 54, so that the stirred material can be discharged from the discharge groove 54 and finally, discharged from the lower discharge groove on the bottom plate of the main box body 10. A receiving tray can be placed below it for receiving materials, which is very convenient.

[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 without stone). The corresponding indicator light can be controlled by the control host in the control cabinet to light up, indicating that feeding can continue in the feed hopper 20. At the same time, the control host in the control cabinet controls the hydraulic system (which is a conventional hydraulic system, consisting of a hydraulic pump, a hydraulic oil tank, and a control valve connected through a connecting pipe and connected to the first flip cylinder 264 and the horizontal push cylinder 144 to achieve operation. It will not be described in detail here. The hydraulic system is fixed on the top surface of the bottom plate of the main box body 10) The electronic control valve is operated, which can control the push rod of the first flip cylinder 264 to push, so that the arc baffle 26 flips back to cover the blanking groove 25, and feeding can continue, which is very convenient.

Claims

1. A mobile asphalt mixing plant for low-temperature asphalt mixing, comprising a main box (10), characterized in that: A central through slot (11) is formed in the middle of the top plate of the main box body (10), and the feed hopper (20) is located directly below the central through slot (11). The feed hopper (20) is located in the main box body (10), and connecting support seats (21) are fixed to the front and rear of the middle of the bottom surfaces 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), and the base of the weighing sensor (22) is fixed to the top surface of the corresponding transverse beam fixed in the main box body (10); An asphalt filling tank (30) is placed on the top surface of the bottom plate of the main box (10), and 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), and the sensing connection parts at 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), and an input pipe (41) of the asphalt delivery pump (40) extends into the asphalt filling tank (30), with the bottom end of the input pipe (41) 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 a discharge pipe (42); a stirring tank (50) is fixed on the top surface of the bottom plate of the main box (10) on one side of the asphalt delivery pump (40); and the discharge end of the discharge pipe (42) is connected to the stirring tank (50); A main feed opening (51) is formed in the middle of the top plate of the mixing tank (50), and the blanking slot (25) of the feed hopper (20) is located directly above the main feed opening (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) at one side of the feed hopper (20), and the bottom surface of the end 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 stirring tank (50).

3. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 2, characterized in that: A protective cover shell (52) is fixed to the top surface of the 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 shell (52). An upper transverse feed slot (531) extending left and right is formed in the middle of the upper cover plate (53), and an upper raised frame extending upward is formed on the top surface of the upper cover plate (53) at the side walls around the upper transverse feed slot (531). The upper transverse feed slot (531) is communicated with the main feed port (51), and 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 shell (52); The bottom of the feed hopper (20) is located in the upper raised frame, and the blanking channel (25) is communicated with the upper transverse feed channel (531).

4. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 1, characterized in that: The front side plate and the rear side wall of the mixing tank (50) are both arc-shaped wall plates protruding outward, and the front and rear parts of the bottom plate of the mixing tank (50) are both arc-shaped wall plates protruding downward. The bottom surface of the bottom plate of the mixing tank (50) between the two arc-shaped wall plates is formed with an upwardly extending long groove, and the top surface of the long groove is an arc-shaped wall surface, and a discharge groove (54) is formed in the middle thereof; A transverse rotating shaft (501) is provided at the front and rear between the left and right plates of the stirring tank (50). The transverse rotating shaft (501) is movably connected to the left and right plates via a bearing. One end of the transverse rotating shaft (501) extends out of the left or right plate and is fixed with a transmission gear (502). A plurality of stirring arms (503) are fixed on the outer 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 stirring tank (50).

5. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 4, characterized in that: A plurality of wear-resistant reinforcement plates (505) are fixed on the inner side wall of the mixing tank (50), and all the wear-resistant reinforcement plates (505) cover all the inner side walls of the mixing tank (50).

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

7. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 4, characterized in that: Side support frames (55) are fixed to the top surfaces of the left and right 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 material blocking plate (57) are fixed to the inner side walls of the upper parts of the two circular end plates (56), and the top surface of the upper arc-shaped material blocking plate (57) is in close contact with the top surface of the elongated groove and covers the discharge channel (54); A rotating shaft (561) is fixed to the middle of the circular end plate (56), and 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), and 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, and 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. The 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), and 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), and the sensing connection parts at 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), and an input pipe (41) of the asphalt delivery pump (40) extends into the asphalt filling tank (30), with the bottom end of the input pipe (41) 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 stirring tank (50).

9. The 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 on 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). A plurality of distribution pipes (431) are connected to the bottom plate of the distribution pipe (43). The lower portion of the distribution pipe (431) extends out of the bottom end of the corresponding through hole on the upper cover plate (53) and is connected to the main feed port (51).

10. The mobile asphalt mixing plant for low-temperature asphalt mixing according to claim 1, characterized in that: A dryer (80) is installed in the main box (10). The dryer (80) is a heat dryer or a drying machine. The dryer (80) is a cold dryer. In this case, a plurality of electric heating plates are fixed on the outer wall of the feed hopper (20). All the 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. Side doors that can be opened and closed are installed on the left and right sides of the main box body (10).

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