Preparation device and preparation method of low-temperature rubber asphalt waste steel slag mixture

Abstract

The invention relates to the technical field of road engineering material preparation, in particular to a low-temperature rubber asphalt waste steel slag mixture preparation device and method, which comprises a tank body and three groups of screening mechanisms, and is characterized by further comprising a mounting seat fixedly mounted at the top of the tank body, and three groups of quantitative conveying mechanisms distributed at the top of the mounting seat at equal intervals, a top cover is fixedly mounted at the top of the mounting seat, a driving mechanism extending into the mounting seat is fixedly mounted at the top of the top cover, a stirring mechanism extending into the tank body is fixedly mounted at the bottom of the driving mechanism, and the driving mechanism drives the three quantitative conveying mechanisms and the stirring mechanism to operate synchronously. And the three groups of running quantitative conveying mechanisms respectively drive the three groups of screening mechanisms to run. Through cooperative work of the quantitative conveying mechanism, the screening mechanism and the stirring mechanism, rubber powder, low-temperature modified asphalt and waste steel slag raw materials can be precisely proportioned and conveyed, and the vibration roller screen improves the waste steel slag screening efficiency and prevents hole blockage.

Description

Technical Field

[0001] This invention relates to the field of road engineering material preparation technology, specifically to a low-temperature rubber asphalt waste steel slag mixture preparation device and preparation method. Background Technology

[0002] With the advancement of green highways and solid waste resource utilization, waste steel slag has shown great potential as an aggregate in roadbed and pavement mixtures. Rubberized asphalt can improve the crack resistance and wear resistance of pavements, while low-temperature mixing technology can reduce energy consumption and harmful gas emissions. Traditional mixture preparation devices suffer from problems such as separation of screening and mixing, low preparation efficiency, high water consumption, easy clogging of waste steel slag screening holes, and poor uniformity of low-temperature mixing. These issues make it difficult to meet the requirements of preparation accuracy, environmental protection, and performance stability in research on improving the road performance of low-temperature modified asphalt waste steel slag mixtures. To address these shortcomings, this invention proposes a low-temperature rubberized asphalt waste steel slag mixture preparation device and method. Summary of the Invention

[0003] The purpose of this invention is to solve the shortcomings of existing technologies, such as low efficiency, waste of water resources, easy clogging of waste steel slag during screening, and poor uniformity of low-temperature mixing.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A low-temperature rubber asphalt waste steel slag mixture preparation device includes a tank and three sets of screening mechanisms. The device is characterized by: a mounting base fixedly installed on the top of the tank, and three sets of quantitative conveying mechanisms evenly distributed on the top of the mounting base. A top cover is fixedly installed on the top of the mounting base, and a drive mechanism extending into the interior of the mounting base is fixedly installed on the top of the top cover. A stirring mechanism extending into the interior of the tank is fixedly installed at the bottom of the drive mechanism. The drive mechanism drives the three sets of quantitative conveying mechanisms and the stirring mechanism to operate synchronously, and the three sets of operating quantitative conveying mechanisms respectively drive the three sets of screening mechanisms.

[0006] The three sets of screening mechanisms are equidistantly installed inside the mounting base. Each screening mechanism includes a vibrating hanger fixedly suspended on the top wall of the mounting base. A mounting frame is movably installed at the bottom of the vibrating hanger. A screening drum is fixedly installed inside the mounting frame. A toothed ring is fixedly installed at one end of the screening drum. A flushing water pipe is fixedly installed on one side of the vibrating hanger. A ring valve pipe is fixedly installed at one end of the flushing water pipe. The vibrating hanger and the mounting frame work together to vibrate the screening drum while it is rolling, thus achieving the purpose of vibrating the screening drum. The low-temperature mixing water sprayed from the flushing water pipe is used to flush the screening drum after screening. The water generated from the flushing is directly transported to the tank to provide water for the mixing of low-temperature rubber asphalt waste steel slag mixture, achieving the purpose of saving water by using it for two purposes.

[0007] Preferably, the vibration hanger includes two hanging frames suspended inside the mounting base, with a through mounting rod rotatably installed between the two hanging frames. An elliptical wheel is fixedly installed on the outer side of the mounting rod, and a second bevel gear is fixedly installed at one end of the mounting rod. The upper and lower meshing surfaces of the second bevel gear are respectively meshed with a transmission bevel gear rod and a linkage transmission mechanism, and the linkage transmission mechanism is mounted on one side of the hanging frame through a bearing seat.

[0008] The mounting frame includes a mounting plate located above the screening drum. Rollers are rotatably mounted inside the mounting plate. Bearing brackets are fixedly mounted at both ends of the mounting plate. Two guide rods are fixedly mounted on both sides of the top of the bearing brackets. The two guide rods extend into the interior of the lifting frame, and a return spring is sleeved on the outer side of the guide rod. The return spring is located inside the lifting frame.

[0009] One side of the toothed ring is equipped with a through-feed pipe via a turntable, and the feed pipe is installed on the outside of the mounting base via a clamp. The other end of the screening drum is equipped with a through-feed pipe via a turntable.

[0010] Preferably, the linkage transmission mechanism consists of a spline rod, a third bevel gear, a fourth bevel gear, and a spline groove. The top end of the spline rod is fixedly mounted with the third bevel gear, and the bottom end of the spline rod is movably sleeved with the fourth bevel gear through the spline groove. The top of the fourth bevel gear is mounted on one side of the bearing bracket through a bearing seat.

[0011] Preferably, the quantitative conveying mechanism comprises a weighing hopper, a conveying pipe, a spiral conveying rod, a first bevel gear, a flexible connecting pipe, and pressure sensors. A conveying pipe is fixedly installed on one side of the weighing hopper, and a spiral conveying rod extending into the weighing hopper is rotatably installed inside the conveying pipe. A first bevel gear is fixedly installed at one end of the spiral conveying rod, and a driven gear is fixedly installed at the other end of the spiral conveying rod. The driven gear meshes with a transmission bevel gear. A flexible connecting pipe is installed through one side of the bottom of the conveying pipe, and the bottom end of the flexible connecting pipe is fixedly connected to the top of the feed pipe. Pressure sensors are equidistantly distributed at the bottom of the weighing hopper.

[0012] Preferably, the driving mechanism includes a drive motor, a transmission rod, and a transmission bevel gear. The output end of the drive motor is fixedly mounted with the transmission rod, and the top of the outer side of the transmission rod is fixedly sleeved with the transmission bevel gear. The bottom surface of the transmission bevel gear is respectively meshed with three first bevel gears.

[0013] Preferably, the stirring mechanism consists of a support, a rotating rod, a stirring assembly, a spiral stirring rod, and a conical stirring frame. Two supports are fixedly sleeved on the outer sides of both ends of the spiral stirring rod, and equidistant rotating rods are rotatably installed between the two supports. Equidistant stirring assemblies are fixedly installed on the outer sides of the rotating rods, and a conical stirring frame is fixedly installed at the bottom end of the spiral stirring rod.

[0014] Preferably, the stirring assembly consists of a fixed frame, a telescopic sleeve, a telescopic spring, and a scraper. The fixed frame is movably sleeved with equidistantly distributed telescopic sleeves. The telescopic springs are fixedly installed inside the telescopic sleeves, and one end of the telescopic springs is fixedly connected to one end of the fixed frame. A scraper is fixedly installed at one end of the telescopic sleeve.

[0015] Preferably, a side cover is fixedly installed on one side of the tank, and three sets of moisture monitoring components are installed equidistantly inside the side cover. The moisture monitoring components consist of a moisture meter, a protective head, and a spring telescopic component. A spring telescopic component is fixedly installed on one side of the moisture meter, one end of the spring telescopic component is fixedly connected to the inner wall of the side cover, and a protective head is sleeved on one end of the moisture meter.

[0016] Preferably, a control box is fixedly installed on the front of the side cover, a water pump is fixedly installed on one side inside the control box, the output end of the water pump is connected to the annular valve pipe through a pipe, and a controller is fixedly installed on the other side inside the control box.

[0017] A method for preparing a low-temperature rubberized asphalt waste steel slag mixture includes the following steps:

[0018] Step 1: Rubber powder, low-temperature modified asphalt, and waste steel slag are respectively put into the three sets of weighing hoppers. The raw materials are weighed by pressure sensors and the weighing data is transmitted to the controller for calculation. When the raw materials in the weighing hoppers reach the weight ratio of the low-temperature mixture, the controller controls the drive mechanism to be powered on and run.

[0019] Step 2: The drive motor is powered on and drives the transmission rod to rotate. The rotating transmission rod drives the transmission bevel gear and the bottom stirring mechanism to rotate synchronously. The rotating transmission bevel gear drives the three meshing first bevel gears to rotate synchronously. The rotating first bevel gear drives the spiral conveyor rod to rotate. The rotating spiral conveyor rod transports the raw material inside the weighing hopper to one end of the conveying pipe. It is then transported to the feed pipe through the flexible connecting pipe at the bottom of the conveying pipe. The raw material is then transported to the inside of the screening drum through the feed pipe.

[0020] Step 3: The screw conveyor transmits power to the transmission bevel gear through a meshing driven gear, driving the transmission bevel gear to rotate. The rotating transmission bevel gear, in turn, drives the mounting rod to rotate via the second bevel gear, and also drives the meshing linkage transmission mechanism to rotate. The rotating linkage transmission mechanism, through a meshing toothed ring, drives the screening drum to roll. The rolling screening drum screens the waste steel slag, rubber powder, and other raw materials inside. Meanwhile, the rotating mounting rod drives the elliptical wheel to rotate. The rotating elliptical wheel intermittently contacts the roller, causing the bearing brackets on both sides of the mounting plate to move down intermittently. The intermittently moving bearing brackets intermittently press and release the return spring through the guide rod. The elastic return force generated by the intermittently pressed return spring drives the screening drum inside the bearing bracket to vibrate, thus vibrating and screening the raw materials inside the screening drum.

[0021] Step 4: The rotating stirring mechanism simultaneously mixes the qualified raw materials screened by the screening mechanism at low temperature, achieving simultaneous screening and mixing to avoid raw material accumulation. Specifically, the rotating spiral stirring rod drives the conical stirring frame to perform low-temperature mixing of the mixture at the bottom of the tank. At the same time, the rotating spiral stirring rod conveys the mixture from the bottom of the tank to the top layer, achieving thorough mixing of the bottom and top layers and improving the uniformity of the low-temperature rubber asphalt waste steel slag mixture. When the spiral stirring rod rotates, the support and rotating rod work together to drive the stirring component to rotate and move. The rotating stirring component mixes the mixture inside the tank while also cleaning the mixture on the inner wall of the tank.

[0022] Step 5: After screening by the screening drum, the low-temperature mixing water is sent to the flushing water pipe through the annular valve pipe. The water sprayed from the flushing water pipe washes the screening drum. The flushing can remove the waste steel slag particles that are clogging the screen holes, thus achieving the purpose of automatically cleaning the screening drum. The water used to clean the screening drum falls into the tank, thus achieving the purpose of cleaning the screening drum and simultaneously completing the mixing and water injection of the low-temperature rubber asphalt waste steel slag mixture, improving the water-saving effect of the device.

[0023] Step Six: The moisture content of the mixture at different locations in the tank is detected by the moisture meter in the three sets of moisture monitoring components, and the three sets of monitoring electrical signals are transmitted to the controller for calculation. When the controller calculates that the three sets of moisture detection data have reached the low temperature mixing set threshold, the controller controls the water pump to stop the water supply, so as to accurately control the amount of water used for low temperature mixing.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] This invention utilizes a quantitative conveying mechanism, a screening mechanism, and a mixing mechanism working in synergy to precisely proportion and convey rubber powder, low-temperature modified asphalt, and waste steel slag raw materials. A vibrating roller screen improves the screening efficiency of waste steel slag and prevents clogging. The rinsing water is used for low-temperature mixing, achieving dual-use of water and significant water conservation. Screening and low-temperature mixing are performed simultaneously, improving preparation efficiency and the uniformity of the mixture. Precise moisture control adapts to the requirements of low-temperature mixing, ensuring the performance stability required for improving the road performance of the low-temperature modified asphalt-waste steel slag mixture. The device combines the advantages of solid waste utilization, low-temperature environmental protection, and water conservation, meeting the needs of green road engineering development. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the mounting base of the present invention;

[0029] Figure 4 This is a schematic diagram showing the connection between the quantitative conveying mechanism and the driving mechanism of the present invention;

[0030] Figure 5 This is a schematic diagram of the drive mechanism structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the screening mechanism of the present invention;

[0032] Figure 7 This is a schematic diagram showing the connection between the mounting bracket and the vibration hanger of the present invention;

[0033] Figure 8 This is a schematic diagram of the internal structure of the hoisting frame of the present invention;

[0034] Figure 9 This is a schematic diagram of the unfolded structure of the linkage transmission mechanism of the present invention;

[0035] Figure 10 This is a schematic diagram of the internal structure of the quantitative conveying mechanism of the present invention;

[0036] Figure 11 This is a schematic diagram of the stirring mechanism of the present invention;

[0037] Figure 12 This is a schematic diagram of the stirring assembly structure of the present invention;

[0038] Figure 13 This is a schematic diagram of the internal structure of the control box of the present invention;

[0039] Figure 14 This is a schematic diagram of the moisture monitoring component structure of the present invention.

[0040] In the diagram: 1. Tank body; 101. Side cover; 102. Control box; 1021. Water pump; 1022. Controller; 103. Moisture monitoring component; 1031. Moisture meter; 1032. Protective head; 1033. Spring telescopic component; 2. Mounting base; 201. Top cover; 3. Quantitative conveying mechanism; 301. Weighing hopper; 302. Conveying pipe; 303. Screw conveyor; 304. First bevel gear; 305. Flexible connecting pipe; 306. Pressure sensor; 307. Driven gear; 4. Screening mechanism; 401. Screening drum; 4011. Toothed ring; 4012. Discharge pipe; 4013. Feed pipe; 402. Mounting frame; 4021. Bearing bracket; 4022. Mounting plate; 4023. Roller; 4024. Guide rod; 4 025. Return spring; 403. Vibration hanger; 4031. Lifting frame; 4032. Mounting rod; 4033. Elliptical wheel; 4034. Second bevel gear; 404. Flushing water pipe; 405. Annular valve pipe; 406. Transmission bevel gear rod; 407. Linkage transmission mechanism; 4071. Spline rod; 4072. Third bevel gear; 4073. Fourth bevel gear; 4074. Spline groove; 5. Drive mechanism; 501. Drive motor; 502. Transmission rod; 503. Transmission bevel gear; 6. Stirring mechanism; 601. Bracket; 602. Rotating rod; 603. Stirring assembly; 6031. Fixing frame; 6032. Telescopic sleeve; 6033. Telescopic spring; 6034. Scraper; 604. Spiral stirring rod; 605. Conical stirring frame. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Please see Figures 1-14 The present invention proposes a low-temperature rubber asphalt waste steel slag mixture preparation device, including a tank 1 and three sets of screening mechanisms 4, and a mounting base 2 fixedly installed on the top of the tank 1, and three sets of quantitative conveying mechanisms 3 equidistantly distributed on the top of the mounting base 2. A top cover 201 is fixedly installed on the top of the mounting base 2, and a drive mechanism 5 extending into the interior of the mounting base 2 is fixedly installed on the top of the top cover 201. A stirring mechanism 6 extending into the interior of the tank 1 is fixedly installed at the bottom of the drive mechanism 5. The three sets of quantitative conveying mechanisms 3 and the stirring mechanism 6 are driven to operate synchronously by the drive mechanism 5, and the three sets of operating quantitative conveying mechanisms 3 respectively drive the three sets of screening mechanisms 4 to operate.

[0045] Three sets of screening mechanisms 4 are equidistantly installed inside the mounting base 2. Each screening mechanism 4 includes a vibrating hanger 403 fixedly suspended on the top wall of the mounting base 2. A mounting frame 402 is movably installed at the bottom of the vibrating hanger 403. A screening drum 401 is fixedly installed inside the mounting frame 402. A toothed ring 4011 is fixedly installed at one end of the screening drum 401. A flushing water pipe 404 is fixedly installed on one side of the vibrating hanger 403. A ring valve pipe 405 is fixedly installed at one end of the flushing water pipe 404. The vibration is achieved by the cooperation between the vibrating hanger 403 and the mounting frame 402 while the screening drum 401 is rolling, thus achieving the purpose of vibrating the drum screen. The low-temperature mixing water sprayed from the flushing water pipe 404 is used to flush the screening drum 401 after screening. The water generated by flushing is directly transported to the tank 1 to provide water for the mixing of low-temperature rubber asphalt waste steel slag mixture, thus achieving the purpose of saving water by using water for two purposes.

[0046] The quantitative conveying mechanism 3 extends into the top cover 201, and the top cover 201 has through holes on three sides. The diameter of the through holes is larger than the diameter of the conveying pipe 302. Therefore, when the quantitative conveying mechanism 3 weighs the low-temperature rubber asphalt waste steel slag raw material, the conveying pipe 302 will not come into contact with the through holes in the top cover 201, thereby ensuring the accuracy of the quantitative conveying mechanism 3 in weighing the raw material.

[0047] The three sets of quantitative conveying mechanisms 3 are connected to the drive mechanism 5. When the drive mechanism 5 is powered on, the three sets of quantitative conveying mechanisms 3 operate synchronously to realize the synchronous weighing and conveying of three raw materials: rubber powder, low-temperature modified asphalt, and waste steel slag. This improves the batching efficiency of low-temperature mixtures and meets the proportioning accuracy requirements of the research on improving the road performance of low-temperature modified asphalt and waste steel slag mixtures.

[0048] When the three sets of quantitative conveying mechanisms 3 are running, they synchronously drive the three sets of screening mechanisms 4. The three sets of quantitative conveying mechanisms 3 respectively convey the three raw materials to the three sets of screening drums 401. The vibrating hanger 403 vibrates against the mounting frame 402, and the vibrating mounting frame 402 drives the rotating screening drums 401 to vibrate. This causes the waste steel slag, rubber powder, and other raw materials inside the screening drums 401 to vibrate, improving the screening efficiency. Simultaneously, the vibrating screening drums 401 prevent material blockage. The 01 screen aperture reduces the clogging and maintenance rate of the screening drum 401. To further reduce the clogging and maintenance rate of the screening drum 401, after screening by the screening drum 401, water is distributed to the flushing water pipe 404 through the annular valve pipe 405. The water sprayed from the flushing water pipe 404 flushes the screening drum 401, which can clean the waste steel slag particles clogging the screen apertures. At the same time, the water used to clean the screening drum 401 falls into the tank 1, completing the purpose of injecting water into the low-temperature rubber asphalt waste steel slag mixture processing inside the tank 1.

[0049] like Figure 6-8 As shown, the vibration hanger 403 includes two lifting frames 4031 suspended inside the mounting base 2. A through mounting rod 4032 is rotatably installed between the two lifting frames 4031. An elliptical wheel 4033 is fixedly installed on the outer side of the mounting rod 4032. A second bevel gear 4034 is fixedly installed at one end of the mounting rod 4032. The upper and lower meshing surfaces of the second bevel gear 4034 are respectively meshed with a transmission bevel gear rod 406 and a linkage transmission mechanism 407. The linkage transmission mechanism 407 is mounted on one side of the lifting frame 4031 through a bearing seat.

[0050] Mounting frame 402 includes mounting plate 4022 located above screening drum 401. Rollers 4023 are rotatably mounted inside mounting plate 4022. Bearing brackets 4021 are fixedly mounted at both ends of mounting plate 4022. Two guide rods 4024 are fixedly mounted on both sides of the top of bearing brackets 4021. The two guide rods 4024 extend into the interior of lifting frame 4031, and a return spring 4025 is sleeved on the outer side of the guide rods 4024. The return spring 4025 is located inside lifting frame 4031.

[0051] A through-feed pipe 4012 is installed on one side of the toothed ring 4011 via a turntable, and the through-feed pipe 4012 is installed on the outside of the mounting base 2 via a clamp. A through-feed pipe 4013 is installed on the other end of the screening roller 401 via a turntable.

[0052] Among them, by Figure 4 It can be seen that the two lifting frames 4031 are fixedly installed on the top inside the mounting base 2 by inclined plates. The inclined angle of the inclined plates makes the screening drum 401 installed at an angle, which facilitates the discharge of unqualified waste steel slag, rubber powder and other raw materials screened inside the screening drum 401 through the feed pipe 4012.

[0053] The screw conveyor 303 transmits power to the transmission bevel gear 406 through the meshing driven gear 307, which drives the transmission bevel gear 406 to rotate the mounting rod 4032 through the second bevel gear 4034, and also drives the meshing linkage transmission mechanism 407 to rotate. The rotating linkage transmission mechanism 407 drives the screening drum 401 to roll through the meshing toothed ring 4011 to screen the internal raw materials.

[0054] The rotating mounting rod 4032 drives the elliptical wheel 4033 to rotate. When the elliptical wheel 4033 rotates to its maximum diameter and is perpendicular to the roller 4023, the elliptical wheel 4033 abuts against the roller 4023, causing the bearing brackets 4021 on both sides of the mounting plate 4022 to move downward. The downward-moving bearing brackets 4021 compress the return spring 4025 through the guide rod 4024. When the maximum diameter of the elliptical wheel 4033 rotates away from the roller 4023 and is perpendicular to it, the abutment of the elliptical wheel 4033 against the roller 4023 is released. The elastic return force of the compressed return spring 4025 drives the screening drum 401 inside the bearing bracket 4021 to vibrate, thereby achieving the purpose of vibrating the screening drum 401.

[0055] like Figure 9 As shown, the linkage transmission mechanism 407 consists of a spline rod 4071, a third bevel gear 4072, a fourth bevel gear 4073, and a spline groove 4074. The third bevel gear 4072 is fixedly installed at the top of the spline rod 4071, and the fourth bevel gear 4073 is movably sleeved at the bottom of the spline rod 4071 through the spline groove 4074. The top of the fourth bevel gear 4073 is installed on one side of the bearing bracket 4021 through a bearing seat.

[0056] The third bevel gear 4072 is meshed with the second bevel gear 4034. The rotating second bevel gear 4034 drives the meshed third bevel gear 4072 to rotate. The rotating third bevel gear 4072 drives the fourth bevel gear 4073 to rotate through the spline rod 4071. The rotating fourth bevel gear 4073 drives the screening drum 401 to roll through the meshed tooth ring 4011. The fourth bevel gear 4073 can move up and down outside the spline rod 4071 by means of the spline groove 4074 opened inside. At the same time, when the spline rod 4071 rotates, it also drives the fourth bevel gear 4073 to rotate. Thus, when the bearing bracket 4021 moves up and down, it drives the fourth bevel gear 4073 to move outside the spline rod 4071 through the bearing seat, while the spline rod 4071 rotates and drives the fourth bevel gear 4073 to rotate.

[0057] like Figure 10 As shown, the quantitative conveying mechanism 3 consists of a weighing hopper 301, a conveying pipe 302, a spiral conveying rod 303, a first bevel gear 304, a flexible connecting pipe 305, and a pressure sensor 306. A conveying pipe 302 is fixedly installed on one side of the weighing hopper 301. A spiral conveying rod 303 extending into the weighing hopper 301 is rotatably installed inside the conveying pipe 302. A first bevel gear 304 is fixedly installed at one end of the spiral conveying rod 303, and a driven gear 307 is fixedly installed at the other end of the spiral conveying rod 303. The driven gear 307 is meshed with the transmission bevel gear 406. A flexible connecting pipe 305 is installed through one side of the bottom of the conveying pipe 302. The bottom end of the flexible connecting pipe 305 is fixedly connected to the top of the feed pipe 4013. Pressure sensors 306 are equidistantly distributed at the bottom of the weighing hopper 301.

[0058] The pressure sensor 306 is electrically connected to the controller 1022 via a wire. Rubber powder, low-temperature modified asphalt, and waste steel slag are put into the weighing hopper 301. The weighing hopper 301 transmits the weight of the raw materials to the pressure sensor 306. The pressure sensor 306 weighs the raw materials and transmits the weighing data to the controller 1022 for calculation. The controller 1022 sets the batching weight data value according to the proportioning requirements of the research on improving the road performance of low-temperature modified asphalt and waste steel slag mixture. When the calculated raw materials in the three sets of weighing hoppers 301 have reached the batching data value, the controller 1022 controls the drive mechanism 5 to be powered on and drives the quantitative conveying mechanism 3 to transport the raw materials.

[0059] When the drive mechanism 5 is powered on, it drives the screw conveyor 303 to rotate through the meshing first bevel gear 304. The rotating screw conveyor 303 transports the raw material inside the weighing hopper 301 to one end of the conveying pipe 302. At the same time, the rotating screw conveyor 303 transmits power to the transmission bevel gear 406 through the meshing driven gear 307.

[0060] like Figure 5 , Figure 11 As shown, the drive mechanism 5 includes a drive motor 501, a transmission rod 502, and a transmission bevel gear 503. The output end of the drive motor 501 is fixedly mounted with the transmission rod 502. The transmission bevel gear 503 is fixedly sleeved on the top of the outer side of the transmission rod 502. The bottom surface of the transmission bevel gear 503 is respectively meshed with three first bevel gears 304.

[0061] The drive motor 501 is powered on and drives the transmission rod 502 to rotate. The rotating transmission rod 502 drives the three meshing first bevel gears 304 to rotate synchronously through the transmission bevel gear 503. The rotating transmission rod 502 also drives the bottom stirring mechanism 6 to rotate.

[0062] like Figure 11 As shown, the stirring mechanism 6 consists of a support 601, a rotating rod 602, a stirring assembly 603, a spiral stirring rod 604, and a conical stirring frame 605. Two supports 601 are fixedly sleeved on the outer sides of both ends of the spiral stirring rod 604. Equally spaced rotating rods 602 are rotatably installed between the two supports 601. Equally spaced stirring assemblies 603 are fixedly installed on the outer side of the rotating rods 602. A conical stirring frame 605 is fixedly installed at the bottom end of the spiral stirring rod 604.

[0063] The rotating spiral stirring rod 604 drives the conical stirring frame 605 and the support 601 to rotate synchronously. The rotating conical stirring frame 605 performs low-temperature mixing of the mixture at the bottom of the tank 1, and the rotating spiral stirring rod 604 conveys the mixture from the bottom of the tank 1 to the upper layer. At the same time, the rotating rod 602 disperses and mixes the bottom mixture output, so as to achieve full mixing of the bottom mixture and the upper mixture and improve the uniformity of the low-temperature rubber asphalt waste steel slag mixture. The rotating support 601 and the rotating rod 602 work together to drive the stirring component 603 to rotate and move. The rotating stirring component 603 mixes the mixture inside the tank 1. The stirring component 603, which is attached to the inner wall of the tank 1, cleans the mixture adhering to the inner wall of the tank 1, so as to achieve the purpose of automatic cleaning and avoid the mixture from sticking to the wall and affecting its performance.

[0064] like Figure 12 As shown, the stirring assembly 603 consists of a fixed frame 6031, a telescopic sleeve 6032, a telescopic spring 6033, and a scraper 6034. The telescopic sleeves 6032 are movably sleeved on the outside of the fixed frame 6031 and are evenly distributed. The telescopic spring 6033 is fixedly installed inside the telescopic sleeve 6032, and one end of the telescopic spring 6033 is fixedly connected to one end of the fixed frame 6031. The scraper 6034 is fixedly installed on one end of the telescopic sleeve 6032.

[0065] When the scraper 6034 encounters an obstacle, the scraper 6034 compresses the telescopic spring 6033 via the telescopic sleeve 6032, causing the scraper 6034 to shift and pass over the obstacle. After passing over the obstacle, the restoring force of the compressed telescopic spring 6033 resists the telescopic sleeve 6032, causing the scraper 6034 to return to its original position, ensuring that the scraper 6034 adheres to the inner wall of the tank 1 and guaranteeing the cleaning effect of the scraper 6034 on the inner wall of the tank 1. Figure 12 It is known that one end of the scraper 6034 is provided with an inclined surface. When the inclined surface of the scraper 6034 contacts the inclined surface of the protective head 1032, the scraper 6034 applies a squeezing force to the moisture monitoring component 103.

[0066] like Figure 1 , Figure 2 , Figure 14 As shown, a side cover 101 is fixedly installed on one side of the tank 1. Three sets of moisture monitoring components 103 are installed equidistantly inside the side cover 101. The moisture monitoring components 103 consist of a moisture meter 1031, a protective head 1032, and a spring telescopic component 1033. A spring telescopic component 1033 is fixedly installed on one side of the moisture meter 1031. One end of the spring telescopic component 1033 is fixedly connected to the inner wall of the side cover 101. The protective head 1032 is sleeved on one end of the moisture meter 1031.

[0067] Among them, the moisture meter 1031 in the three sets of moisture monitoring components 103 can detect the moisture of the mixture at different locations in the tank 1, and transmit the three sets of monitoring electrical signals to the controller 1022 for calculation. When the controller 1022 calculates that the three sets of moisture detection data reach the same low temperature mixing set threshold, the controller 1022 controls the water pump 1021 to stop the water supply, so as to accurately control the water supply and avoid water waste, while ensuring that the moisture content of the low temperature rubber asphalt waste steel slag mixture meets the road performance requirements.

[0068] Furthermore, when the protective head 1032 is subjected to the squeezing force of the scraper 6034, the protective head 1032 transmits the squeezing force to the spring telescopic component 1033 through the moisture meter 1031, causing elastic compression. This causes the protective head 1032 to retract into the side cover 101. During the retraction process of the protective head 1032, the mixed material on the outside of the protective head 1032 can be cleaned, ensuring the accuracy of the moisture meter 1031.

[0069] like Figure 13 As shown, a control box 102 is fixedly installed on the front of the side cover 101. A water pump 1021 is fixedly installed on one side inside the control box 102. The output end of the water pump 1021 is connected to the annular valve pipe 405 through a pipe. A controller 1022 is fixedly installed on the other side inside the control box 102.

[0070] The control box 102 can provide safety protection for the internal structure to avoid damage from external forces. The water pump 1021 is electrically connected to the controller 1022 through a wire, so that the controller 1022 can control the operation of the water pump 1021. The water inlet of the water pump 1021 is connected to an external water pipe. The water pump 1021 delivers the low-temperature mixing water to the annular valve pipe 405 through the pipeline. The annular valve pipe 405 distributes the water source to three sets of flushing water pipes 404. The three sets of flushing water pipes 404 respectively flush and clean the three sets of screening drums 401.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A low-temperature rubber asphalt waste steel slag mixture preparation device, comprising a tank (1) and three sets of screening mechanisms (4), characterized in that: It also includes a mounting base (2) fixedly installed on the top of the tank (1), and three sets of quantitative conveying mechanisms (3) evenly distributed on the top of the mounting base (2). A top cover (201) is fixedly installed on the top of the mounting base (2), and a drive mechanism (5) extending into the interior of the mounting base (2) is fixedly installed on the top of the top cover (201). A stirring mechanism (6) extending into the interior of the tank (1) is fixedly installed on the bottom of the drive mechanism (5). The three sets of quantitative conveying mechanisms (3) and the stirring mechanism (6) are driven to run synchronously through the drive mechanism (5). The three sets of quantitative conveying mechanisms (3) drive the three sets of screening mechanisms (4) to run respectively. The three sets of screening mechanisms (4) are equidistantly installed inside the mounting base (2). The screening mechanism (4) includes a vibrating hanger (403) fixedly suspended on the top wall of the mounting base (2). A mounting frame (402) is movably installed at the bottom of the vibrating hanger (403). A screening drum (401) is fixedly installed inside the mounting frame (402). A toothed ring (4011) is fixedly installed at one end of the screening drum (401). A flushing water pipe (404) is fixedly installed on one side of the vibrating hanger (403). One end of 404 is fixedly installed with an annular valve pipe (405). The vibration hanger (403) and the mounting frame (402) work together to vibrate while the screening drum (401) is rolling, so as to achieve the purpose of vibrating the drum screen. The low-temperature mixing water sprayed from the flushing water pipe (404) is used to flush the screening drum (401) after screening. The water generated by flushing is directly transported to the tank (1) to provide water for the mixing of low-temperature rubber asphalt waste steel slag mixture, so as to achieve the purpose of saving water by using water for two purposes.

2. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 1, characterized in that: The vibration hanger (403) includes two hangers (4031) suspended inside the mounting base (2). A through mounting rod (4032) is rotatably installed between the two hangers (4031). An elliptical wheel (4033) is fixedly installed on the outside of the mounting rod (4032). A second bevel gear (4034) is fixedly installed at one end of the mounting rod (4032). The upper and lower meshing surfaces of the second bevel gear (4034) are respectively meshed with a transmission bevel rod (406) and a linkage transmission mechanism (407). The linkage transmission mechanism (407) is mounted on one side of the hanger (4031) through a bearing seat. The mounting frame (402) includes a mounting plate (4022) located above the screening drum (401). Rollers (4023) are rotatably mounted inside the mounting plate (4022). Bearing brackets (4021) are fixedly mounted at both ends of the mounting plate (4022). Two guide rods (4024) are fixedly mounted on both sides of the top of the bearing brackets (4021). The two guide rods (4024) extend into the interior of the lifting frame (4031), and a return spring (4025) is sleeved on the outer side of the guide rods (4024). The return spring (4025) is located inside the lifting frame (4031). One side of the toothed ring (4011) is equipped with a through feed pipe (4012) via a turntable, and the feed pipe (4012) is installed on the outside of the mounting base (2) via a hoop. The other end of the screening drum (401) is equipped with a through feed pipe (4013) via a turntable.

3. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 1, characterized in that: The linkage transmission mechanism (407) consists of a spline rod (4071), a third bevel gear (4072), a fourth bevel gear (4073), and a spline groove (4074). The top end of the spline rod (4071) is fixedly installed with the third bevel gear (4072), and the bottom end of the spline rod (4071) is movably sleeved with the fourth bevel gear (4073) through the spline groove (4074). The top of the fourth bevel gear (4073) is installed on one side of the bearing bracket (4021) through a bearing seat.

4. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 2, characterized in that: The quantitative conveying mechanism (3) consists of a weighing hopper (301), a conveying pipe (302), a spiral conveying rod (303), a first bevel gear (304), a flexible connecting pipe (305), and a pressure sensor (306). A through conveying pipe (302) is fixedly installed on one side of the weighing hopper (301). A spiral conveying rod (303) extending into the weighing hopper (301) is rotatably installed inside the conveying pipe (302). One side of the spiral conveying rod (303)... The first bevel gear (304) is fixedly installed at one end, and the driven gear (307) is fixedly installed at the other end of the screw conveyor (303). The driven gear (307) is meshed with the transmission bevel gear (406). A flexible connecting pipe (305) is installed through one side of the bottom of the conveying pipe (302). The bottom end of the flexible connecting pipe (305) is fixedly connected to the top of the feed pipe (4013). Pressure sensors (306) are evenly distributed at the bottom of the weighing hopper (301).

5. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 4, characterized in that: The drive mechanism (5) includes a drive motor (501), a transmission rod (502) and a transmission bevel gear (503). The output end of the drive motor (501) is fixedly mounted with the transmission rod (502). The transmission bevel gear (503) is fixedly sleeved on the top of the outer side of the transmission rod (502). The bottom surface of the transmission bevel gear (503) is respectively meshed with three first bevel gears (304).

6. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 1, characterized in that: The stirring mechanism (6) consists of a bracket (601), a rotating rod (602), a stirring assembly (603), a spiral stirring rod (604), and a conical stirring frame (605). Two brackets (601) are fixedly sleeved on the outer sides of both ends of the spiral stirring rod (604). Equally spaced rotating rods (602) are rotatably installed between the two brackets (601). Equally spaced stirring assemblies (603) are fixedly installed on the outer side of the rotating rods (602). A conical stirring frame (605) is fixedly installed at the bottom end of the spiral stirring rod (604).

7. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 6, characterized in that: The stirring assembly (603) consists of a fixed frame (6031), a telescopic sleeve (6032), a telescopic spring (6033), and a scraper (6034). The fixed frame (6031) is movably sleeved with telescopic sleeves (6032) that are evenly distributed. The telescopic spring (6033) is fixedly installed inside the telescopic sleeve (6032), and one end of the telescopic spring (6033) is fixedly connected to one end of the fixed frame (6031). The scraper (6034) is fixedly installed at one end of the telescopic sleeve (6032).

8. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 1, characterized in that: A side cover (101) is fixedly installed on one side of the tank (1). Three sets of moisture monitoring components (103) are installed equidistantly inside the side cover (101). The moisture monitoring component (103) consists of a moisture meter (1031), a protective head (1032), and a spring telescopic component (1033). A spring telescopic component (1033) is fixedly installed on one side of the moisture meter (1031). One end of the spring telescopic component (1033) is fixedly connected to the inner wall of the side cover (101). A protective head (1032) is sleeved on one end of the moisture meter (1031).

9. The low-temperature rubber asphalt waste steel slag mixture preparation device according to claim 8, characterized in that: A control box (102) is fixedly installed on the front of the side cover (101). A water pump (1021) is fixedly installed on one side inside the control box (102). The output end of the water pump (1021) is connected to the annular valve pipe (405) through a pipe. A controller (1022) is fixedly installed on the other side inside the control box (102).

10. A method for preparing a low-temperature rubberized asphalt waste steel slag mixture, comprising a low-temperature rubberized asphalt waste steel slag mixture preparation apparatus as described in any one of claims 1-9, characterized in that, Its preparation method includes the following steps: Step 1: Rubber powder, low-temperature modified asphalt, and waste steel slag raw materials are respectively put into the three sets of weighing hoppers (301). The raw materials are weighed by pressure sensor (306) and the weighing data is transmitted to controller (1022) for calculation. When the raw materials in the weighing hopper (301) reach the weight ratio of low-temperature mixture, controller (1022) controls the drive mechanism (5) to be powered on and run. Step 2: The drive motor (501) is powered on and drives the transmission rod (502) to rotate. The rotating transmission rod (502) drives the transmission bevel gear (503) and the bottom stirring mechanism (6) to rotate synchronously. The rotating transmission bevel gear (503) drives the three meshing first bevel gears (304) to rotate synchronously. The rotating first bevel gears (304) drive the spiral conveyor rod (303) to rotate. The rotating spiral conveyor rod (303) conveys the raw material inside the weighing hopper (301) to one end of the conveying pipe (302). The raw material is then conveyed to the feed pipe (4013) through the flexible connecting pipe (305) at the bottom of the conveying pipe (302). The raw material is then conveyed to the inside of the screening drum (401) through the feed pipe (4013). Step 3: The screw conveyor (303) transmits power to the transmission bevel gear (406) through the meshing driven gear (307), driving the transmission bevel gear (406) to rotate. The rotating transmission bevel gear (406) drives the mounting rod (4032) to rotate through the second bevel gear (4034), and also drives the meshing linkage transmission mechanism (407) to rotate. The rotating linkage transmission mechanism (407) drives the screening drum (401) to roll through the meshing toothed ring (4011). The rolling screening drum (401) screens the waste steel slag, rubber powder and other raw materials inside. The rotating mounting rod (4032) drives the elliptical wheel (4033) to rotate. The rotating elliptical wheel (4033) intermittently contacts the roller (4023), causing the bearing brackets (4021) on both sides of the mounting plate (4022) to move down intermittently. The intermittently moving bearing brackets (4021) intermittently press and release the return spring (4025) through the guide rod (4024). The elastic return force generated by the intermittently pressed return spring (4025) drives the screening drum (401) inside the bearing bracket (4021) to vibrate, and vibrates and screens the raw materials inside the screening drum (401). Step 4: The rotating stirring mechanism (6) performs synchronous low-temperature mixing on the qualified raw materials screened out by the screening mechanism (4), so as to achieve simultaneous screening and mixing and avoid raw material accumulation. The rotating spiral stirring rod (604) drives the conical stirring frame (605) to perform low-temperature mixing on the bottom of the tank (1). At the same time, the rotating spiral stirring rod (604) transports the bottom mixture of the tank (1) to the upper layer, so as to achieve full mixing of the bottom mixture and the upper mixture and improve the uniformity of the low-temperature rubber asphalt waste steel slag mixture. When the spiral stirring rod (604) rotates, the support (601) and the rotating rod (602) work together to drive the stirring component (603) to rotate and move. The rotating stirring component (603) mixes the mixture inside the tank (1) and cleans the mixture on the inner wall of the tank (1). Step 5: After screening by the screening drum (401), the low-temperature mixing water is sent to the flushing water pipe (404) through the annular valve pipe (405). The water sprayed from the flushing water pipe (404) is used to flush the screening drum (401). The flushing can clean the waste steel slag particles that are blocked in the screen holes, thus achieving the purpose of automatically cleaning the screening drum (401). The water used to clean the screening drum (401) falls into the tank (1), thus achieving the purpose of cleaning the screening drum (401) and simultaneously completing the mixing and water injection of the low-temperature rubber asphalt waste steel slag mixture, thereby improving the water-saving effect of the device. Step 6: The moisture content of the mixture at different locations in the tank (1) is detected by the moisture meter (1031) in the three sets of moisture monitoring components (103), and the three sets of monitoring electrical signals are transmitted to the controller (1022) for calculation. When the controller (1022) calculates that the three sets of moisture detection data reach the low temperature mixing set threshold, the controller (1022) controls the water pump (1021) to stop the water supply and accurately control the amount of water used for low temperature mixing.

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