Stirring structure of asphalt laying device

Abstract

The invention relates to the technical field of asphalt laying, and discloses a stirring structure of an asphalt laying device, the stirring structure comprises a stirring cylinder, a material pumping pipeline is fixed on a supporting plate, a material pumping head is fixed at the head end of the material pumping pipeline, the material pumping head penetrates through one side of a discharging channel, a sealing plate is fixed on one side of the material pumping head, and the sealing plate is fixed on the other side of the material pumping pipeline. A pump box is fixed to the other end of the movable frame and connected with the tail end of the material pumping pipeline, a backflow pipeline is fixed to the top of the pump box and penetrates through one side of the stirring barrel, a lifting mechanism is fixed to the top of the stirring barrel, and the circulating material pumping mechanism penetrates through the bottom of the lifting mechanism and is arranged on the lifting mechanism in a lap joint mode. According to the stirring structure of the asphalt laying device, the first piston moves up and down back and forth, so that asphalt in the discharging channel is repeatedly pumped into the pump box and conveyed back into the stirring barrel through the backflow pipeline, the asphalt can roll up and down back and forth in the pump box, and the stirring effect is more sufficient and thorough.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt paving, in particular to a stirring structure of an asphalt paving device. Background Art

[0002] Asphalt is a dark brown complex mixture of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid, mostly in the form of liquid or semi-solid petroleum. It has a black surface and is soluble in carbon disulfide and carbon tetrachloride. Asphalt is an organic gelling material that is waterproof, moisture-proof and anti-corrosive. Asphalt can be mainly divided into three types: coal tar asphalt, petroleum asphalt and natural asphalt: among them, coal tar asphalt is a by-product of coking, petroleum asphalt is the residue after crude oil distillation, and natural asphalt is stored underground. Some of it forms mineral layers or accumulates on the surface of the earth's crust. Asphalt is mainly used in industries such as coatings, plastics, rubber, and road paving. When paving the road, a stirring structure is needed to fully mix the asphalt with other raw materials.

[0003] For example, it is now found that the typical stirring structure in the prior art is such as publication number CN111569716A, an asphalt mixing device, including a base, a centrifugal cylinder, a servo motor is embedded in the base, the servo motor is controlled by a servo motor controller to make intermittent start and stop movements, the motor shaft of the servo motor is detachably connected to the bottom of the centrifugal cylinder, the centrifugal cylinder has a hollow cavity with openings on both sides, a middle partition is arranged in the middle of the hollow cavity, the middle partition divides the hollow cavity into two left and right stirring chambers, a piston plate is movably installed in the stirring chamber, a counterweight is arranged at the outer end of the piston plate, a slide rod is arranged on the counterweight, and the slide rod is slidably installed in the guide groove opened on the inner wall of the stirring chamber. The asphalt mixing device of the present invention utilizes a centrifugal force to realize a stirring method of stirring and extruding at the same time, and uses a spring to realize reset extrusion while also using a spring to realize stirring, which greatly improves the stirring efficiency.

[0004] For another example, it is now found that a typical stirring structure in the prior art is such as authorization number CN113648913B, an asphalt heating stirring tank, an exhaust port is opened on the top of the tank body, a stirring motor is arranged on the top of the tank body, a stirring shaft is connected to the output shaft of the stirring motor, the stirring shaft enters the inner cavity of the tank body, and also includes a gas holding box, the gas holding box is located outside the tank body, the air inlet of the gas holding box is connected to the exhaust port through an air inlet pipe, an exhaust valve is arranged at the exhaust hole of the gas holding box, the exhaust hole of the gas holding box is connected to the air purification device through the exhaust pipe, a single-chip microcomputer is arranged on the gas holding box, a pressure sensor is provided in the gas holding box, the pressure sensor can detect the air pressure information in the gas holding box and send the information to the single-chip microcomputer, the single-chip microcomputer is connected to the exhaust valve and can control the opening and closing of the exhaust valve, the single-chip microcomputer can control the opening and closing of the air purification device, and the device can centrally process the exhaust gas in batches to reduce the power consumed by the air purification device.

[0005] For another example, it is now found that the stirring structure in the prior art is typically such as authorization number CN117225240B, an asphalt heating and stirring device, which relates to the technical field of asphalt production equipment, including a stirring and heating component, a dust removal component, a feeding component and a support component, wherein a dust removal component is arranged above the stirring and heating component, a feeding component is arranged above the dust removal component, and a support component is arranged below the stirring and heating component. The present invention sets a stirring and heating component, and the stirring and heating component can stir and heat the asphalt raw material. By setting a dust removal component and a feeding component above the stirring and heating component, the dust removal component can absorb and process the dust generated during the mixing process, and the feeding component can realize the addition of asphalt raw materials. By setting a support component below the stirring and heating component, the support component can realize the support of the device, and the support component can be towed by a vehicle to facilitate the movement of the device.

[0006] When the existing stirring structure stirs asphalt and other raw materials, since the asphalt is in a liquid state after heating, the asphalt tends to flow downward and pile up. It is difficult to roll the asphalt up and down while stirring, resulting in the stirring effect being not fully uniform and thorough. In view of the above problems, the existing equipment needs to be improved. Summary of the invention

[0007] The object of the present invention is to provide a stirring structure for an asphalt paving device to solve the problem that when the existing stirring structure proposed in the above background technology stirs asphalt and other raw materials, since the asphalt is in a liquid state, the asphalt is easy to flow downward and accumulate together, and it is difficult to roll the asphalt up and down while stirring, resulting in the stirring effect being not sufficient, uniform and thorough.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mixing structure of an asphalt paving device, comprising a mixing drum, a feeding channel is fixed on the top of the mixing drum, a rotating shaft is rotatably connected to the top of the mixing drum, a mixing rod is fixed to the bottom of the rotating shaft, a feeding channel is fixed to the bottom of the mixing drum, a circulating material extraction mechanism is fixed to one side of the mixing drum, the circulating material extraction mechanism comprises a second support frame, an electric telescopic rod is fixed to the inner wall of the second support frame, a moving frame is fixed to one end of the electric telescopic rod, a supporting plate is fixed to one end of the moving frame, a filter screen and a baffle are respectively fixed to both sides of one end surface of the supporting plate, the filter screen and the baffle both extend into the feeding channel, a feeding pipeline is fixed to the supporting plate, a feeding head is fixed to the head end of the feeding pipeline, the feeding head passes through one side of the feeding channel, a sealing plate is fixed to one side of the feeding head, a pump box is fixed to the other end of the moving frame, the pump box is connected to the end of the feeding pipeline, a return pipeline is fixed to the top of the pump box, and the return pipeline passes through one side of the mixing drum.

[0009] A lifting mechanism is fixed on the top of the mixing drum, and the circulating material extraction mechanism passes through the bottom of the lifting mechanism and is placed on the lifting mechanism.

[0010] Working principle: First, asphalt and other raw materials are passed into the feed channel, and then into the mixing drum. The rotating shaft and the mixing rod rotate to fully mix the various raw materials together. The mixing drum has a heating system that can heat the asphalt. The filter screen blocks the solid raw materials, and the asphalt passes through the filter screen. At the same time, the cam rotates, and the second piston moves back and forth left and right under the squeezing of the cam and the supporting action of the second compression spring. When the second piston moves to the left, the third piston moves upward, and the lifting plate moves upward, thereby pulling the pull rod and the first piston upward. The valve plate is in a closed state, and the extraction pipe and the extraction head extract the asphalt in the discharge channel into the pump box. When the second piston moves to the right, the third piston moves downward, and the pull rod, the first piston and the limit column are in the first The valve plate automatically rotates and opens, and the asphalt flows through the through hole onto the first piston. The cam rotates continuously, and the first piston moves up and down in the pump box, so that the asphalt in the discharge channel is repeatedly pumped into the pump box and pressed back into the mixing drum through the reflux pipe. The asphalt rolls up and down in the mixing drum, making the mixing effect more thorough. After completing the mixing operation, the electric telescopic rod shrinks, and the moving frame, support plate, filter screen, baffle, extraction pipe, extraction head, sealing plate, pump box, pulling rod and reflux pipe move to the left as a whole, and the discharge channel opens, so that the material can be discharged smoothly. The sealing plate seals the side of the discharge channel, and the pulling rod leaves the lifting plate. During the discharge process, the pump box no longer works while the stirring rod rotates.

[0011] Preferably, a support column is fixed to the bottom of the mixing drum, and four support columns are provided and evenly distributed on the mixing drum in a circumferential direction.

[0012] By adopting the above technical solution, the support column plays a supporting role on the mixing drum.

[0013] Preferably, a first support frame is fixed to the top of the mixing drum, and a motor is fixed to the inner top of the first support frame. The bottom of the motor is connected to the rotating shaft, and a cam is fixed to the outer side of the rotating shaft.

[0014] By adopting the above technical solution, the rotation of the shaft can drive the cam to rotate.

[0015] Preferably, a first piston is slidably connected in the pump box, and limiting columns are symmetrically fixed on both sides of the bottom of the first piston. The limiting columns penetrate the bottom of the pump box, and the limiting columns are connected to the bottom of the pump box through a first compression spring, and the first compression spring is wrapped around the outside of the limiting columns.

[0016] By adopting the above technical solution, the limiting column plays a role of supporting and limiting the first piston.

[0017] Preferably, a through hole is provided on the first piston, and valve plates are symmetrically rotatably connected to two inner walls of the through hole, and the valve plate is connected to the first piston via a volute spring.

[0018] By adopting the above technical solution, when the first piston moves upward, the valve plate is automatically closed, and when the first piston moves downward, the valve plate is automatically opened.

[0019] Preferably, a pull-out rod is fixed to the top of the first piston, and the pull-out rod passes through the top of the pump box, and the pull-out rod is a "T"-shaped structure.

[0020] By adopting the above technical solution, the first piston can be driven to move upward when the pull rod moves upward.

[0021] Preferably, the lifting mechanism includes a first oil storage cylinder, and the first oil storage cylinder is fixed on the top of the mixing drum, a second compression spring is fixed on an inner wall of the first oil storage cylinder, and a second piston is fixed at one end of the second compression spring, the second piston is slidably connected in the first oil storage cylinder, and a roller is fixed on one side of the second piston, and the roller is in contact with the outer side of the cam.

[0022] By adopting the above technical solution, the cam can squeeze the second piston when it rotates, and the roller can reduce the friction between the cam and the second piston.

[0023] Preferably, a third support frame is fixed to the top of the mixing drum, and a second oil storage cylinder is fixed to one side of the third support frame, and the second oil storage cylinder is connected to the first oil storage cylinder through a connecting pipe.

[0024] By adopting the above technical solution, the connecting pipeline can connect the second oil storage cylinder with the first oil storage cylinder.

[0025] Preferably, a third piston is slidably connected in the second oil storage cylinder, and a lifting plate is fixed to the bottom of the third piston, and the pulling rod passes through the lifting plate and rests on the lifting plate.

[0026] By adopting the above technical solution, when the second piston moves to the left, the third piston moves upward, thereby driving the lifting plate to move upward.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The stirring structure of the asphalt paving device can achieve the purpose of rolling up and down and fully and evenly stirring through the coordinated use of the stirring drum, rotating shaft, cam, stirring rod, feeding channel, filter screen, pump box, first piston, reflux pipe, second compression spring, second piston and third piston. After the asphalt and other raw materials are passed into the stirring drum, the stirring rod rotates together with the rotating shaft, which is convenient for fully stirring and mixing various raw materials together. The filter screen plays a role of blocking the solid raw materials. When the cam rotates, the second piston moves back and forth left and right under the squeezing of the cam and the supporting action of the second compression spring, the third piston moves back and forth up and down, and the first piston moves back and forth up and down, so as to repeatedly pump the asphalt in the feeding channel into the pump box and transport it back to the stirring drum through the reflux pipe, so that the asphalt can roll up and down in the pump box, making the stirring effect more sufficient and thorough;

[0029] Furthermore, the present application provides a power source to pump and circulate the asphalt through the cooperation of the rotating shaft and the cam, which can reduce energy consumption on the one hand, and on the other hand, the rotation speed of the rotating shaft determines the speed of the asphalt circulation, that is, the faster the rotating shaft drives the stirring rod to rotate, the faster the asphalt circulation speed is. When the stirring rod efficiently mixes various raw materials, the asphalt can also participate in the mixing adaptively and efficiently, which greatly improves the efficiency of asphalt mixing.

[0030] Furthermore, in the present application, through the setting of the valve plate, it can make it possible to achieve the suction of asphalt into the pump box and discharge of the pump box through the first piston. The suction and discharge do not interfere with each other, and stable suction and discharge can be achieved, which is beneficial to the reliability of the asphalt circulation flow participating in the mixing.

[0031] 2. The mixing structure of the asphalt paving device can achieve the purpose of smooth material discharge through the coordinated use of the material discharge channel, the mobile frame, the support plate, the filter screen, the baffle plate and the sealing plate. After the mixing operation is completed, the mobile frame, the support plate, the filter screen and the baffle plate move to the left as a whole, which is convenient for opening the material discharge channel for material discharge, and the sealing plate plays a role in blocking the side of the material discharge pipe;

[0032] In addition, after the movable frame, support plate, filter screen and baffle are moved to the left as a whole, it is also convenient to clean the pipes inside the circulating pumping mechanism and discharge the residual asphalt from the pipes inside the circulating pumping mechanism to facilitate the next use.

[0033] 3. The stirring structure of the asphalt paving device can achieve the purpose of reducing friction through the coordinated use of the cam, the second piston and the roller. When the cam rotates continuously, the second piston moves back and forth, and the roller rolls on the cam, which is convenient for reducing the friction between the second piston and the cam.

[0034] Furthermore, through the cooperation of the second piston, the roller, the cam and the second compression spring, a power source is provided for asphalt suction and discharge. In essence, the transmission of this power is a flexible transmission, that is, the rotating shaft transmits its power to the first piston, and driving the first piston to move up and down to realize asphalt extraction and discharge is a nonlinear power transmission, which is affected by the asphalt pressure inside the pump box. When the asphalt pressure inside the pump box is relatively large, the second compression spring will delay the release of elastic potential energy and reduce the speed of asphalt suction / discharge. When the asphalt pressure inside the pump box is relatively small, the second compression spring will accelerate the release of elastic potential energy and increase the speed of asphalt suction / discharge, thereby causing the asphalt discharged from the reflux pipe to be more uniform, which is beneficial to improving the uniformity of asphalt mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0036] Figure 2 It is a front cross-sectional structural schematic diagram of the present invention;

[0037] Figure 3 It is a schematic diagram of the structure of the circulating material extraction mechanism of the present invention;

[0038] Figure 4 It is a schematic diagram of the connection structure of the support plate, filter screen, baffle, extraction head and sealing plate of the present invention;

[0039] Figure 5 It is a schematic diagram of the structure of the lifting mechanism of the present invention;

[0040] Figure 6 For the present invention Figure 3 Enlarged structural diagram at A in the middle.

[0041] In the figure: 1, mixing drum; 2, supporting column; 3, feeding channel; 4, first supporting frame; 5, motor; 6, rotating shaft; 7, cam; 8, stirring rod; 9, unloading channel; 10, circulating extraction mechanism; 1001, second supporting frame; 1002, electric telescopic rod; 1003, moving frame; 1004, supporting plate; 1005, filter screen; 1006, baffle; 1007, extraction pipeline; 1008, extraction head; 1009, sealing plate; 1010, pump box; 1011, first active Plug; 1012, limit column; 1013, first compression spring; 1014, through hole; 1015, valve plate; 1016, volute spring; 1017, pull rod; 1018, return pipe; 11, lifting mechanism; 1101, first oil storage cylinder; 1102, second compression spring; 1103, second piston; 1104, roller; 1105, connecting pipe; 1106, second oil storage cylinder; 1107, third support frame; 1108, third piston; 1109, lifting plate. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 6 The present invention provides a technical solution: a mixing structure of an asphalt paving device, comprising a mixing drum 1, a feeding channel 3 is fixed on the top of the mixing drum 1, a rotating shaft 6 is rotatably connected to the top of the mixing drum 1, a mixing rod 8 is fixed to the bottom of the rotating shaft 6, a feeding channel 9 is fixed to the bottom of the mixing drum 1, a circulating material extraction mechanism 10 is fixed to one side of the mixing drum 1, and the circulating material extraction mechanism 10 comprises a second support frame 1001, an electric telescopic rod 1002 is fixed on the inner wall of the second support frame 1001, a mobile frame 1003 is fixed to one end of the electric telescopic rod 1002, a support plate 1004 is fixed to one end of the mobile frame 1003, and the support plate 100 A filter screen 1005 and a baffle plate 1006 are fixed to both sides of one end surface, and both the filter screen 1005 and the baffle plate 1006 extend into the material discharge channel 9. A pumping pipe 1007 is fixed to the support plate 1004. A pumping head 1008 is fixed to the head end of the pumping pipe 1007. The pumping head 1008 passes through one side of the material discharge channel 9. A sealing plate 1009 is fixed to one side of the pumping head 1008. A pump box 1010 is fixed to the other end of the movable frame 1003. The pump box 1010 is connected to the end of the pumping pipe 1007. A return pipe 1018 is fixed to the top of the pump box 1010. The return pipe 1018 passes through one side of the mixing drum 1.

[0044] A lifting mechanism 11 is fixed on the top of the mixing drum 1 , and the circulating material extraction mechanism 10 passes through the bottom of the lifting mechanism 11 and is placed on the lifting mechanism 11 .

[0045] In this embodiment, Figure 1 and Figure 2 As shown, a support column 2 is fixed to the bottom of the mixing drum 1. Four support columns 2 are provided and the four support columns 2 are evenly distributed circumferentially on the mixing drum 1. The support columns 2 support the mixing drum 1. Using four support columns 2 at the same time makes the supporting effect better.

[0046] In this embodiment, Figure 1 and Figure 2 As shown, a first support frame 4 is fixed to the top of the mixing drum 1, and a motor 5 is fixed to the inner top of the first support frame 4. The bottom of the motor 5 is connected to the rotating shaft 6, and a cam 7 is fixed to the outer side of the rotating shaft 6. The first support frame 4 supports the motor 5. The rotating shaft 6 can rotate under the action of the motor 5, thereby driving the cam 7 and the stirring rod 8 to rotate. The rotation of the stirring rod 8 can fully stir and mix various raw materials together.

[0047] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, a first piston 1011 is slidably connected in the pump box 1010, and limiting columns 1012 are symmetrically fixed on both sides of the bottom of the first piston 1011. The limiting columns 1012 penetrate the bottom of the pump box 1010, and the limiting columns 1012 are connected to the bottom of the pump box 1010 through a first compression spring 1013. The first compression spring 1013 is wrapped around the outer side of the limiting columns 1012. When the first piston 1011 moves upward, the asphalt in the feed channel 9 can be pumped into the pump box 1010, and the asphalt can flow back into the mixing drum 1 through the reflux pipe 1018, which is convenient for assisting the asphalt to roll up and down in the mixing drum 1, so that the mixing effect is better. When the first piston 1011 moves upward, it can drive the limiting columns 1012 to move upward, and the first compression spring 1013 can assist the first piston 1011 and the limiting columns 1012 to reset.

[0048] In this embodiment, Figure 2 , Figure 3 and Figure 6 As shown, a through hole 1014 is opened on the first piston 1011, and valve plates 1015 are symmetrically rotatably connected on the two inner walls of the through hole 1014. The valve plate 1015 is connected to the first piston 1011 through a volute spring 1016. When the first piston 1011 moves upward, the valve plate 1015 is automatically closed and the through hole 1014 is in a closed state. When the first piston 1011 moves downward, the valve plate 1015 automatically rotates and opens the through hole 1014. When the first piston 1011 moves up and down, the asphalt can be repeatedly pumped into the pump box 1010.

[0049] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, a pull rod 1017 is fixed to the top of the first piston 1011, and the pull rod 1017 passes through the top of the pump box 1010. The pull rod 1017 is a "T"-shaped structure. When the pull rod 1017 moves upward under the pulling action, the first piston 1011 moves upward accordingly. When the pull rod 1017 is not pulled, the first piston 1011 and the limit column 1012 can automatically reset and move downward under the action of the first compression spring 1013.

[0050] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, the lifting mechanism 11 includes a first oil storage cylinder 1101, and the first oil storage cylinder 1101 is fixed on the top of the mixing drum 1, a second compression spring 1102 is fixed on an inner wall of the first oil storage cylinder 1101, and a second piston 1103 is fixed at one end of the second compression spring 1102, the second piston 1103 is slidably connected in the first oil storage cylinder 1101, and a roller 1104 is fixed on one side of the second piston 1103, the roller 1104 is in contact with the outer side of the cam 7, hydraulic oil is stored in the first oil storage cylinder 1101, when the cam 7 rotates, it can squeeze the second piston 1103 to move to the left, when the cam 7 does not squeeze the second piston 1103, the second piston 1103 can automatically bounce to the right under the action of the second compression spring 1102, when the cam 7 rotates continuously, the second piston 1103 moves back and forth in the first oil storage cylinder 1101, and the roller 1104 rolls on the cam 7, so as to reduce the friction between the cam 7 and the second piston 1103.

[0051] In this embodiment, Figure 1 , Figure 2 and Figure 5 As shown, a third support frame 1107 is fixed to the top of the mixing drum 1, and a second oil storage cylinder 1106 is fixed to one side of the third support frame 1107. The second oil storage cylinder 1106 is connected to the first oil storage cylinder 1101 via a connecting pipe 1105. The connecting pipe 1105 serves to connect the second oil storage cylinder 1106 with the first oil storage cylinder 1101.

[0052] In this embodiment, Figure 1 , Figure 2 and Figure 5As shown, a third piston 1108 is slidably connected inside the second oil storage cylinder 1106, and a lifting plate 1109 is fixed to the bottom of the third piston 1108, and a pulling rod 1017 passes through the lifting plate 1109 and is placed on the lifting plate 1109. When the second piston 1103 moves to the left, the third piston 1108 can move upward under the action of oil pressure, thereby driving the lifting plate 1109 to move upward, and the lifting plate 1109 can pull the pulling rod 1017 to move upward.

[0053] The mixing structure of the asphalt paving device and its specific mixing working method are as follows:

[0054] S1: First, asphalt and other raw materials are passed into the feed channel 3, and then into the mixing drum 1, and the rotating shaft 6 and the stirring rod 8 rotate to preliminarily mix the various raw materials together;

[0055] S2: The mixing drum 1 is equipped with a heating system to heat the asphalt, which usually needs to be heated to above 160 degrees Celsius. During the heating process, the asphalt can be converted from solid to liquid. As the temperature rises sharply, the viscosity of the asphalt is greatly reduced, and it has a certain fluidity. The filter 1005 blocks the solid raw material, and the asphalt passes through the filter 1005. At the same time, the cam 7 rotates, and the second piston 1103 reciprocates left and right under the squeezing of the cam 7 and the supporting action of the second compression spring 1102. When the second piston 1103 moves to the left, the third piston 1108 moves upward, and the lifting plate 1109 moves upward, thereby pulling the pulling rod 1017 and the first piston 1011 upward, and the valve plate 1015 is in a closed state. The extraction pipe 1007 and the extraction head 1008 extract the asphalt in the discharge channel 9 into the pump box 1010;

[0056] S3: When the second piston 1103 moves to the right, the third piston 1108 moves downward, and the pull rod 1017, the first piston 1011 and the limit column 1012 move downward under the action of the first compression spring 1013. Since the bottom of the first piston 1011 is filled with liquid asphalt, when the valve plate 1015 is blocked from moving downward, the valve plate 1015 will overcome the elastic force of the spiral spring 1016, and the valve plate 1015 will rotate upward and open, and the asphalt will flow through the through hole 1014 onto the first piston 1011. Then, the valve plate 1015 will automatically reset and switch to the closed state under the elastic force of the spiral spring 1016.

[0057] S4: The cam 7 rotates continuously, and the first piston 1011 moves up and down in the pump box 1010, so that the asphalt in the discharge channel 9 is repeatedly pumped into the pump box 1010 and pressed back into the mixing drum 1 through the reflux pipe 1018. The asphalt rolls up and down in the mixing drum 1, making the mixing effect more thorough and the various raw materials mixed more fully;

[0058] S5: After completing the stirring and mixing operation, the electric telescopic rod 1002 shrinks, the movable frame 1003, the support plate 1004, the filter screen 1005, the baffle 1006, the extraction pipe 1007, the extraction head 1008, the sealing plate 1009, the pump box 1010, the pulling rod 1017 and the reflux pipe 1018 move to the left as a whole, and the discharge channel 9 is opened to discharge the materials smoothly. The sealing plate 1009 seals the side of the discharge channel 9, and the pulling rod 1017 leaves the lifting plate 1109. During the discharge process, the stirring rod 8 rotates and the pump box 1010 no longer works.

[0059] In summary, the mixing structure of the asphalt paving device achieves the purposes of up and down tumbling, fully and evenly mixing, smooth material discharge and reduced friction, and meets the requirements of full mixing in asphalt production.

[0060] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

[0061] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0062] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mixing structure of an asphalt paving device, comprising a mixing drum (1), characterized in that: A feeding channel (3) is fixed on the top of the mixing drum (1), a rotating shaft (6) is rotatably connected to the top of the mixing drum (1), a mixing rod (8) is fixed on the bottom of the rotating shaft (6), a feeding channel (9) is fixed on the bottom of the mixing drum (1), a circulating material extraction mechanism (10) is fixed on one side of the mixing drum (1), and the circulating material extraction mechanism (10) comprises a second support frame (1001), an electric telescopic rod (1002) is fixed on the inner wall of the second support frame (1001), a moving frame (1003) is fixed on one end of the electric telescopic rod (1002), a supporting plate (1004) is fixed on one end of the moving frame (1003), and a filter screen (1002) is respectively fixed on both sides of one end surface of the supporting plate (1004). 5) and a baffle (1006), the filter screen (1005) and the baffle (1006) both extend into the material discharge channel (9), a pumping pipe (1007) is fixed on the support plate (1004), a pumping head (1008) is fixed at the head end of the pumping pipe (1007), the pumping head (1008) passes through one side of the material discharge channel (9), a sealing plate (1009) is fixed on one side of the pumping head (1008), a pump box (1010) is fixed at the other end of the movable frame (1003), the pump box (1010) is connected to the end of the pumping pipe (1007), a return pipe (1018) is fixed at the top of the pump box (1010), and the return pipe (1018) passes through one side of the mixing drum (1); A lifting mechanism (11) is fixed to the top of the mixing drum (1), and the circulating material extraction mechanism (10) passes through the bottom of the lifting mechanism (11) and is placed on the lifting mechanism (11).

2. The stirring structure of the asphalt paving device according to claim 1, characterized in that: A support column (2) is fixed to the bottom of the mixing drum (1), four support columns (2) are provided, and the four support columns (2) are evenly distributed on the mixing drum (1) in the circumferential direction.

3. The stirring structure of the asphalt paving device according to claim 1, characterized in that: A first support frame (4) is fixed to the top of the mixing drum (1), and a motor (5) is fixed to the inner top of the first support frame (4); the bottom of the motor (5) is connected to a rotating shaft (6), and a cam (7) is fixed to the outer side of the rotating shaft (6).

4. The stirring structure of the asphalt paving device according to claim 1, characterized in that: A first piston (1011) is slidably connected inside the pump box (1010), and limiting columns (1012) are symmetrically fixed on both sides of the bottom of the first piston (1011), the limiting columns (1012) penetrate the bottom of the pump box (1010), and the limiting columns (1012) are connected to the bottom of the pump box (1010) through a first compression spring (1013), and the first compression spring (1013) is wrapped around the outside of the limiting columns (1012).

5. The stirring structure of the asphalt paving device according to claim 4, characterized in that: A through hole (1014) is provided on the first piston (1011), and valve plates (1015) are symmetrically rotatably connected to the two inner walls of the through hole (1014), and the valve plate (1015) is connected to the first piston (1011) via a volute spring (1016).

6. The stirring structure of the asphalt paving device according to claim 4, characterized in that: A pull rod (1017) is fixed to the top of the first piston (1011), and the pull rod (1017) passes through the top of the pump box (1010), and the pull rod (1017) is a "T"-shaped structure.

7. The stirring structure of the asphalt paving device according to claim 3, characterized in that: The lifting mechanism (11) includes a first oil storage cylinder (1101), and the first oil storage cylinder (1101) is fixed on the top of the mixing drum (1), a second compression spring (1102) is fixed on an inner wall of the first oil storage cylinder (1101), and a second piston (1103) is fixed at one end of the second compression spring (1102), the second piston (1103) is slidably connected in the first oil storage cylinder (1101), and a roller (1104) is fixed on one side of the second piston (1103), and the roller (1104) is in contact with the outer side of the cam (7).

8. The stirring structure of the asphalt paving device according to claim 7, characterized in that: A third support frame (1107) is fixed to the top of the mixing drum (1), and a second oil storage cylinder (1106) is fixed to one side of the third support frame (1107), and the second oil storage cylinder (1106) is connected to the first oil storage cylinder (1101) via a connecting pipe (1105).

9. The stirring structure of an asphalt paving device according to claim 6 or 8, characterized in that: A third piston (1108) is slidably connected inside the second oil storage cylinder (1106), and a lifting plate (1109) is fixed to the bottom of the third piston (1108). The pulling rod (1017) passes through the lifting plate (1109) and rests on the lifting plate (1109).

Images