A material mixing device and mixing method for road bridges

Abstract

The present invention discloses a material mixing device and a mixing method for road and bridge materials in the technical field of road and bridge material processing, including a mixing drum. A fixed drum is rotatably connected inside the mixing drum. A number of equally spaced stirring rods are fixedly connected to the fixed drum. A surplus material cleaning component is arranged on the stirring rods. By adopting the surplus material cleaning component, after the concrete is stirred, the inside of the mixing equipment can be cleaned, and the surplus material attached to the inside of the mixing equipment can be scraped off. When cleaning the mixing equipment, the turntable drives the telescopic plate to rotate through the transmission plate, and at the same time drives the stirring rod to rotate. As the rotation speed of the rotating rod increases, the centrifugal force generated when the turntable rotates will slide the transmission plate along the arc-shaped groove towards the outside of the fixed drum, that is, the transmission plate pushes the telescopic plate to slide outwards. During the sliding process, the telescopic plate will contact the outer wall of the first scraping frame, and the surplus material attached to the telescopic plate is scraped off by the first scraping frame.

Description

Technical Field

[0001] The present invention relates to the technical field of road and bridge material processing, and specifically relates to a material mixing device and a mixing method for roads and bridges. Background Technique

[0002] When constructing roads and bridges, it is necessary to stir and mix the concrete raw materials used in the construction to make concrete. In order to make the use of concrete more scientific, the preparation of concrete is generally mixed in a mixing station now, and then the mixed concrete is transported to the construction site by a transport vehicle for use, so as to avoid the problem that the concrete ratio made by individuals is not accurate enough and the hardness of the concrete does not meet the requirements.

[0003] In the prior art, the mixing of concrete is to add raw materials in proportion inside the mixing equipment for mixing and stirring. After the stirring is completed, the concrete is poured out for use. However, due to the characteristics of concrete, its viscosity is relatively high, and its texture is very hard after solidification. This makes a lot of concrete still adhere to the inside of the mixing equipment after the concrete inside the mixing equipment is poured out. If the concrete adhering to the mixing equipment is not cleaned, on the one hand, it will cause waste of raw materials, and on the other hand, the adhering concrete will quickly solidify, and in severe cases, it will affect the mixing function of the mixing equipment. However, there is generally a lack of professional internal cleaning equipment for concrete mixing on existing mixing equipment.

[0004] Based on this, the present invention designs a material mixing device and a mixing method for roads and bridges to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a material mixing device and a mixing method for roads and bridges to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A material mixing device for roads and bridges, including a mixing barrel, a fixed barrel is rotatably connected inside the mixing barrel, a plurality of stirring rods are fixedly connected to the fixed barrel and are evenly distributed at equal intervals, and a residual material cleaning component is arranged on the stirring rods, and the residual material cleaning component is used for cleaning the residual material remaining on the inner wall of the mixing barrel and the surface of the stirring rods after the mixed material is discharged.

[0007] As a further aspect of the present invention, the waste material cleaning component includes a rotating rod rotatably disposed inside a fixed cylinder. A first one-way bearing is rotatably connected to the top of the rotating rod, and the first one-way bearing is fixedly connected to the inner wall of the fixed cylinder. A second one-way bearing is rotatably connected to the rotating rod, and a turntable is fixedly connected to the top of the second one-way bearing. The turntable is rotatably sleeved on the rotating rod. A plurality of arc-shaped grooves are equidistantly distributed on the turntable. A plurality of driving plates corresponding to the arc-shaped grooves are slidably connected inside the fixed cylinder. One end of the driving plate is slidably connected to the arc-shaped groove. One end of the stirring rod is provided with a telescopic plate, and one end of the driving plate passes through the fixed cylinder and is fixedly connected to the telescopic plate. A second scraping frame is slidably sleeved on the stirring rod, and the second scraping frame is fixedly connected to the driving plate. A connecting plate is fixedly connected to the top of the stirring rod, and a first scraping frame is fixedly connected to one end of the connecting plate. The first scraping frame is slidably sleeved outside the telescopic plate, and a scraping groove for the driving plate to pass through is connected to one side of the first scraping frame.

[0008] As a further aspect of the present invention, a side scraping plate is provided at one end of the telescopic plate. A rotating seat for rotatably connecting with the telescopic plate is fixedly connected to the side wall of the side scraping plate, and a torsion spring for its reset is provided inside the rotating seat.

[0009] As a further aspect of the present invention, a connecting shaft is fixedly connected to the bottom of the stirring rod. A bottom scraping plate is slidably sleeved on the connecting shaft. An inclined chute is provided on the side wall of the bottom scraping plate. A connecting bar is fixedly connected to the bottom of the telescopic plate, and one end of the connecting bar is slidably connected to the inclined chute.

[0010] As a further aspect of the present invention, a plurality of legs are fixedly connected to the bottom of the mixing cylinder at equal intervals, and a discharge port is fixedly connected to the bottom of the mixing cylinder.

[0011] As a further aspect of the present invention, the side wall of the side scraping plate is a smooth inclined wall.

[0012] As a further aspect of the present invention, the inner wall of the second scraping frame can completely fit the outer wall of the stirring rod, and the inner wall of the first scraping frame can completely fit the outer wall of the telescopic plate.

[0013] As a further aspect of the present invention, the bottom outer wall of the bottom scraping plate is in the shape of a chamfered arc.

[0014] A method for mixing materials for road bridges, the method comprising the following steps:

[0015] Step 1: Start the mixing device so that the stirring rod rotates inside the mixing cylinder, and quantitatively add the required raw materials into the mixing cylinder according to the ratio.

[0016] Step 2: Continuously stir to fully mix the raw materials inside the mixing cylinder.

[0017] Step 3: After the stirring is completed, turn off the mixing equipment and take out the mixture inside the mixing drum.

[0018] Step 4: After all the mixture is taken out, use the residual material cleaning component to clean the residual material attached to the inside of the mixing drum and the surface of the stirring rod, and also take out the cleaned residual material for use.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. By adopting the residual material cleaning component, after the concrete is stirred, the inside of the mixing equipment can be cleaned, the residual material attached to the inside of the mixing equipment can be scraped off, and the mixing equipment is cleaned. The turntable drives the telescopic plate to rotate through the transmission plate, and at the same time drives the stirring rod to rotate. As the rotation speed of the rotating rod increases, the centrifugal force when the turntable rotates will slide the transmission plate along the arc-shaped groove to the outside of the fixed cylinder, that is, the transmission plate pushes the telescopic plate to slide outwards. During the sliding process, the telescopic plate will contact the outer wall of the first scraping frame, and the residual material attached to the telescopic plate is scraped off by the first scraping frame and drips to the bottom of the mixing drum under the action of gravity, so that all raw materials can be fully utilized, and it can also ensure that the surface of the mixing drum and the stirring rod will not have the problem of surface concrete solidification due to untimely cleaning of the residual material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 is a schematic diagram of the structure of the residual material cleaning component;

[0023] Figure 3 is an exploded structure diagram of the residual material cleaning component;

[0024] Figure 4 is a partial sectional structure diagram of the fixed cylinder;

[0025] Figure 5 is a front structure diagram of the rotating plate, the first one-way bearing, the rotating rod, the turntable and the second one-way bearing;

[0026] Figure 6 is a flowchart of the method of the present invention.

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] 1. Mixing drum; 2. Legs; 3. Discharge port; 4. Stirring rod; 5. Fixed cylinder; 6. Telescopic plate; 7. Side scraper; 8. Bottom scraper; 9. Rotating seat; 10. First scraping frame; 11. Connecting plate; 12. Scraping groove; 13. Connecting shaft; 15. Inclined groove; 16. Connecting strip; 17. Transmission plate; 18. Second scraping frame; 19. First one-way bearing; 20. Rotating rod; 21. Turntable; 22. Arc groove; 23. Second one-way bearing. Detailed implementation manner

[0029] Please refer to Figure 1-6 , the present invention provides a technical solution: a material mixing device for road bridges, including a mixing drum 1, a fixed cylinder 5 is rotatably connected inside the mixing drum 1, and a plurality of stirring rods 4 evenly distributed are fixedly connected to the fixed cylinder 5. A residual material cleaning assembly is arranged on the stirring rod 4, and the residual material cleaning assembly is used to clean the residual material remaining on the inner wall of the mixing drum 1 and the surface of the stirring rod 4 after mixing and discharging.

[0030] When the above solution is put into actual use, start the mixing equipment to make the stirring rod 4 rotate inside the mixing drum 1, quantitatively add the required raw materials into the mixing drum 1 according to the ratio, continuously stir to make the raw materials inside the mixing drum 1 fully mixed, after the stirring is completed, turn off the mixing equipment, and take out the mixed material inside the mixing drum 1. After all the mixed material is taken out, use the residual material cleaning assembly to clean the residual material attached to the inside of the mixing drum 1 and the surface of the stirring rod 4, and also take out the cleaned residual material for use. The advantage of doing this is that after taking out the mixed material after mixing, the residual material cleaning assembly can effectively remove the residual material remaining inside the mixing drum 1 and the residual material attached to the surface of the stirring rod 4, so that all the raw materials can be fully utilized, and it can also ensure that the surfaces of the mixing drum 1 and the stirring rod 4 will not have the problem of surface concrete solidification due to untimely cleaning of the residual material.

[0031] As a further solution of the present invention, the residual material cleaning component includes a rotating rod 20, the rotating rod 20 is rotatably arranged inside a fixed cylinder 5, the top of the rotating rod 20 is rotatably connected to a first one-way bearing 19, the first one-way bearing 19 is fixedly connected to the inner wall of the fixed cylinder 5, a second one-way bearing 23 is rotatably connected to the rotating rod 20, the top of the second one-way bearing 23 is fixedly connected to a turntable 21, the turntable 21 is rotatably sleeved on the rotating rod 20, a plurality of arc-shaped grooves 22 are arranged on the turntable 21 at equal intervals, a plurality of transmission plates 17 corresponding to the arc-shaped grooves 22 are slidably connected inside the fixed cylinder 5, one end of the transmission plate 17 is slidably connected to the arc-shaped groove 22, one end of the stirring rod 4 is provided with a telescopic plate 6, one end of the transmission plate 17 passes through the fixed cylinder 5 and is fixedly connected to the telescopic plate 6, a second scraping frame 18 is slidably sleeved on the stirring rod 4, the second scraping frame 18 is fixedly connected to the transmission plate 17, the top of the stirring rod 4 is fixedly connected to a connecting plate 11, one end of the connecting plate 11 is fixedly connected to a first scraping frame 10, the first scraping frame 10 is slidably sleeved outside the telescopic plate 6, and a scraping groove 12 for the transmission plate 17 to pass through is connected to one side of the first scraping frame 10;

[0032] When the above solution is put into actual use, when mixing and stirring the raw materials, the rotating rod 20 is driven by the motor at the bottom of the mixing cylinder 1 to rotate Figure 4 in the clockwise direction, the rotating rod 20 drives the fixed cylinder 5 to rotate through the first one-way bearing 19, the transmission directions of the first one-way bearing 19 and the second one-way bearing 23 are opposite. When the rotating rod 20 drives the fixed cylinder 5 to rotate through the first one-way bearing 19, the rotating rod 20 cannot drive the turntable 21 to rotate through the second one-way bearing 23, that is, at this time, relative rotation occurs between the rotating rod 20 and the second one-way bearing 23. The rotation of the fixed cylinder 5 drives the stirring rod 4 to rotate, and the raw materials inside the mixing cylinder 1 are mixed and stirred;

[0033] After the mixing is completed and the mixed material is taken out, as Figure 2-4 shown, when it is necessary to clean the residual material inside the mixing cylinder 1, start the motor at the bottom of the mixing cylinder 1 to drive the rotating rod 20 to rotate Figure 4Rotate counterclockwise. At this time, the rotating rod 20 rotates relative to the first one-way bearing 19, and the fixed cylinder 5 cannot be driven to rotate through the first one-way bearing 19. Instead, the second one-way bearing 23 is driven to make the turntable 21 rotate. The turntable 21 drives the telescopic plate 6 to rotate through the transmission plate 17, and at the same time drives the stirring rod 4 to rotate. Moreover, as the rotation speed of the rotating rod 20 increases, the centrifugal force generated when the turntable 21 rotates will slide the transmission plate 17 along the arc-shaped groove 22 towards the outside of the fixed cylinder 5, that is, the transmission plate 17 pushes the telescopic plate 6 to slide outwards. During the sliding process, the telescopic plate 6 will contact the outer wall of the first scraping frame 10, and the remaining material attached to the telescopic plate 6 will be scraped off by the first scraping frame 10 and drip to the bottom of the mixing cylinder 1 under the action of gravity. The transmission plate 17 will also drive the second scraping frame 18 to slide, and the second scraping frame 18 will scrape off the remaining material attached to the surface of the stirring rod 4. After the transmission plate 17 slides from one side of the arc-shaped groove 22 to the other side, one side wall of the telescopic plate 6 can just contact the inner wall of the mixing cylinder 1. As the fixed cylinder 5 continues to rotate, the telescopic plate 6 can scrape off all the remaining material attached to the inner wall of the mixing cylinder 1, and then all the remaining material at the bottom of the mixing cylinder 1 is also taken out. Just stop the rotation of the fixed cylinder 5. When it is necessary to mix the raw materials again, the motor drives the fixed cylinder 5 to rotate clockwise. Under the action of centripetal force, the transmission plate 17 will slide to the inner side of the arc-shaped groove 22 again, and the transmission plate 17 will drive the telescopic plate 6 to reset. The purpose of doing this is that during the stirring process, the telescopic plate 6 will not contact the inner wall of the mixing cylinder 1. Because the rotation of the mixing equipment is continuous and long-term, continuous contact between the telescopic plate 6 and the inner wall of the mixing cylinder 1 will cause wear. In this way, only after the stirring is over, the telescopic plate 6 is contacted with the mixing cylinder 1 to scrape off the remaining material, which can greatly slow down the wear speed of the telescopic plate 6.

[0034] As a further solution of the present invention, one end of the telescopic plate 6 is provided with a side scraping plate 7. A rotating seat 9 for rotatably connecting with the telescopic plate 6 is fixedly connected to the side wall of the side scraping plate 7, and a torsion spring for its reset is arranged inside the rotating seat 9;

[0035] When the above solution is put into actual use, when the telescopic plate 6 contacts the inner wall of the mixing cylinder 1, the side scraping plate 7 will first contact the inner wall of the mixing cylinder 1, and as the telescopic plate 6 continues to slide, the side scraping plate 7 will relatively slide with the telescopic plate 6 through the rotating seat 9, and then the remaining material on the mixing cylinder 1 will be scraped off by the side scraping plate 7. The purpose of doing this is to avoid hard contact between the telescopic plate 6 and the inner wall of the mixing cylinder 1, effectively slow down the wear effect, and it is also convenient to disassemble and replace the side scraping plate 7 from the telescopic plate 6 without replacing the entire telescopic plate 6.

[0036] As a further solution of the present invention, a connecting shaft 13 is fixedly connected to the bottom of the stirring rod 4, a bottom scraping plate 8 is slidably sleeved on the connecting shaft 13, an inclined chute 15 is formed on the side wall of the bottom scraping plate 8, a connecting strip 16 is fixedly connected to the bottom of the telescopic plate 6, and one end of the connecting strip 16 is slidably connected to the inclined chute 15;

[0037] When the above solution is put into actual use, when the transmission plate 17 pushes the telescopic plate 6 to slide along the direction of the stirring rod 4, the connecting strip 16 at the bottom of the telescopic plate 6 will slide along the inclined chute 15, thereby driving the bottom scraping plate 8 to slide vertically downward along the connecting shaft 13. When the connecting strip 16 slides from one end of the chute 15 to the other end, the bottom scraping plate 8 just slides to the position where it contacts the inner wall of the bottom of the mixing cylinder 1. The purpose of this is that as the rotating rod 20 rotates, the telescopic plate 6 cleans the side wall of the mixing cylinder 1, and at the same time the bottom scraping plate 8 can clean the remaining materials at the bottom of the mixing cylinder 1. The inside of the mixing cylinder 1 is completely cleaned through the cooperation of the telescopic plate 6 and the bottom scraping plate 8.

[0038] As a further solution of the present invention, a plurality of legs 2 are fixedly connected to the bottom of the mixing cylinder 1 at equal intervals, and a discharge port 3 is fixedly connected to the bottom of the mixing cylinder 1.

[0039] As a further solution of the present invention, the side wall of the side scraping plate 7 is a smooth inclined wall;

[0040] When the above solution is put into actual use, the inclined side wall enables the side scraping plate 7 to fit with the side wall of the mixing cylinder 1 after rotating a certain angle, facilitating the scraping of the remaining materials.

[0041] As a further solution of the present invention, the inner wall of the second scraping frame 18 can completely fit with the outer wall of the stirring rod 4, and the inner wall of the first scraping frame 10 can completely fit with the outer wall of the telescopic plate 6;

[0042] When the above solution is put into actual use, being completely fitted together makes the first scraping frame 10 and the second scraping frame 18 have a better effect on scraping the remaining materials on the telescopic plate 6 and the stirring rod 4 respectively.

[0043] As a further solution of the present invention, the outer wall of the bottom of the bottom scraping plate 8 is in the shape of a chamfered arc;

[0044] When the above solution is put into actual use, when the rounded bottom of the bottom scraping plate 8 contacts and rotates with the inner wall of the mixing cylinder 1, the wear generated is smaller, ensuring the service life.

[0045] A method for mixing materials for road bridges, the method comprising the following steps:

[0046] Step 1: Start the mixing device to make the stirring rod 4 rotate inside the mixing barrel 1, and quantitatively add the required raw materials into the mixing barrel 1 according to the proportion;

[0047] Step 2: Keep stirring to fully mix the raw materials inside the mixing barrel 1;

[0048] Step 3: After the stirring is completed, turn off the mixing device and take out the mixture inside the mixing barrel 1;

[0049] Step 4: After all the mixture is taken out, use the residual material cleaning component to clean the residual material attached to the inside of the mixing barrel 1 and the surface of the stirring rod 4, and also take out the cleaned residual material for use.

[0050] Working principle: Start the mixing device to make the stirring rod 4 rotate inside the mixing barrel 1, and quantitatively add the required raw materials into the mixing barrel 1 according to the proportion. Drive the rotating rod 20 at the bottom of the mixing barrel 1 to rotate Figure 4 in the clockwise direction. The rotating rod 20 drives the fixed cylinder 5 to rotate through the first one-way bearing 19. The transmission directions of the first one-way bearing 19 and the second one-way bearing 23 are opposite. When the rotating rod 20 drives the fixed cylinder 5 to rotate through the first one-way bearing 19, the rotating rod 20 cannot drive the turntable 21 to rotate through the second one-way bearing 23, that is, at this time, the rotating rod 20 and the second one-way bearing 23 rotate relatively. The fixed cylinder 5 rotates to drive the stirring rod 4 to rotate, and the raw materials inside the mixing barrel 1 are mixed and stirred;

[0051] When it is necessary to clean the residual material inside the mixing barrel 1, start the motor at the bottom of the mixing barrel 1 to drive the rotating rod 20 along Figure 4Rotate counterclockwise. At this time, the rotating rod 20 rotates relative to the first one-way bearing 19, and the fixed cylinder 5 cannot be driven to rotate through the first one-way bearing 19. Instead, the second one-way bearing 23 is driven to make the turntable 21 rotate. The turntable 21 drives the telescopic plate 6 to rotate through the transmission plate 17, and at the same time, it will also drive the stirring rod 4 to rotate. Moreover, as the rotational speed of the rotating rod 20 increases, the centrifugal force generated when the turntable 21 rotates will slide the transmission plate 17 along the arc-shaped groove 22 towards the outside of the fixed cylinder 5, that is, the transmission plate 17 pushes the telescopic plate 6 to slide outwards. During the sliding process, the telescopic plate 6 will contact the outer wall of the first scraping frame 10, and the remaining material attached to the telescopic plate 6 will be scraped off by the first scraping frame 10 and drip to the bottom of the mixing cylinder 1 under the action of gravity. The transmission plate 17 will also drive the second scraping frame 18 to slide, and the second scraping frame 18 will scrape off the remaining material attached to the surface of the stirring rod 4. After the transmission plate 17 slides from one side of the arc-shaped groove 22 to the other side, one side wall of the telescopic plate 6 can just contact the inner wall of the mixing cylinder 1. As the fixed cylinder 5 continues to rotate, the telescopic plate 6 can scrape off all the remaining material attached to the inner wall of the mixing cylinder 1. When the telescopic plate 6 contacts the inner wall of the mixing cylinder 1, the side scraping plate 7 will first contact the inner wall of the mixing cylinder 1, and as the telescopic plate 6 continues to slide, the side scraping plate 7 will slide relative to the telescopic plate 6 through the rotating seat 9, and then scrape off the remaining material on the mixing cylinder 1 through the side scraping plate 7. When the transmission plate 17 pushes the telescopic plate 6 to slide along the direction of the stirring rod 4, the connecting strip 16 at the bottom of the telescopic plate 6 will slide along the inclined chute 15, thereby driving the bottom scraping plate 8 to slide vertically downward along the connecting shaft 13. When the connecting strip 16 slides from one end of the chute 15 to the other end, the bottom scraping plate 8 just slides to the position where it contacts the inner wall of the bottom of the mixing cylinder 1, and then all the remaining material at the bottom of the mixing cylinder 1 is also removed. Just stop the rotation of the fixed cylinder 5. When it is necessary to mix the raw materials again, the motor drives the fixed cylinder 5 to rotate clockwise. Under the action of the centripetal force, the transmission plate 17 will slide to the inner side of the arc-shaped groove 22 again, and the transmission plate 17 will drive the telescopic plate 6 to reset.

Claims

1. A material mixing device for road bridges, comprising a mixing drum (1), wherein a fixed drum (5) is rotatably connected inside the mixing drum (1), and a plurality of stirring rods (4) evenly distributed at equal intervals are fixedly connected to the fixed drum (5). Characterized in that: A residual material cleaning component is arranged on the stirring rod (4), and the residual material cleaning component is used for cleaning the residual material remaining on the inner wall of the mixing drum (1) and the surface of the stirring rod (4) after mixing and discharging; The residual material cleaning component includes a rotating rod (20), the rotating rod (20) is rotatably arranged inside the fixed drum (5), a first one-way bearing (19) is rotatably connected to the top of the rotating rod (20), the first one-way bearing (19) is fixedly connected to the inner wall of the fixed drum (5), a second one-way bearing (23) is rotatably connected to the rotating rod (20), a turntable (21) is fixedly connected to the top of the second one-way bearing (23), the turntable (21) is rotatably sleeved on the rotating rod (20), a plurality of arc-shaped grooves (22) evenly distributed at equal intervals are formed in the turntable (21), a plurality of transmission plates (17) corresponding to the arc-shaped grooves (22) are slidably connected inside the fixed drum (5), one end of the transmission plate (17) is slidably connected to the arc-shaped groove (22), one end of the stirring rod (4) is provided with a telescopic plate (6), one end of the transmission plate (17) passes through the fixed drum (5) and is fixedly connected to the telescopic plate (6), a second scraping frame (18) is slidably sleeved on the stirring rod (4), the second scraping frame (18) is fixedly connected to the transmission plate (17), a connecting plate (11) is fixedly connected to the top of the stirring rod (4), a first scraping frame (10) is fixedly connected to one end of the connecting plate (11), the first scraping frame (10) is slidably sleeved outside the telescopic plate (6), and a scraping groove (12) for the transmission plate (17) to pass through is connected to one side of the first scraping frame (10); One end of the telescopic plate (6) is provided with a side scraping plate (7), a rotating seat (9) for rotatably connecting with the telescopic plate (6) is fixedly connected to the side wall of the side scraping plate (7), and a torsion spring for its reset is arranged inside the rotating seat (9); A connecting shaft (13) is fixedly connected to the bottom of the stirring rod (4), a bottom scraping plate (8) is slidably sleeved on the connecting shaft (13), an inclined slotted groove (15) is formed in the side wall of the bottom scraping plate (8), a connecting strip (16) is fixedly connected to the bottom of the telescopic plate (6), and one end of the connecting strip (16) is slidably connected to the slotted groove (15); When the turntable (21) rotates, the centrifugal force will slide the transmission plate (17) along the arc-shaped groove (22) to the outside of the fixed drum (5); when the raw materials need to be mixed again, the motor drives the fixed drum (5) to rotate clockwise, and under the action of the centripetal force, the transmission plate (17) will slide to the inside of the arc-shaped groove (22) again, and the transmission plate (17) will drive the telescopic plate (6) to reset.

2. The material mixing device for road bridges according to claim 1, Characterized in that: The bottom of the mixing drum (1) is fixedly connected with a plurality of legs (2) evenly distributed at equal intervals, and the bottom of the mixing drum (1) is fixedly connected with a discharge port (3).

3. A material mixing device for road bridges according to claim 1, characterized in that: The side wall of the side scraper (7) is a smooth inclined wall.

4. A material mixing device for road bridges according to claim 1, characterized in that: The inner wall of the second scraping frame (18) can be completely attached to the outer wall of the stirring rod (4), and the inner wall of the first scraping frame (10) can be completely attached to the outer wall of the telescopic plate (6).

5. A material mixing device for road bridges according to claim 1, characterized in that: The bottom outer wall of the bottom scraper (8) is in the shape of a chamfered arc.

6. A method for mixing materials for road bridges, applicable to a material mixing device for road bridges according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: Step 1: Start the mixing equipment, so that the stirring rod (4) rotates inside the mixing drum (1), and quantitatively add the raw materials to be used into the mixing drum (1) according to the proportion; Step 2: Continuously stir to fully mix the raw materials inside the mixing drum (1); Step 3: After the stirring is completed, turn off the mixing equipment and take out the mixed materials inside the mixing drum (1); Step 4: After all the mixed materials are taken out, use the residual material cleaning component to clean the residual materials attached to the inside of the mixing drum (1) and the surface of the stirring rod (4), and also take out the cleaned residual materials for use.

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