In-place hot recycled mixture mixing device

Abstract

The utility model relates to road engineering technical field especially, more particularly to a kind of hot-in-place recycling mixture mixing device, including mixing bowl, the bottom of mixing bowl is discharge gate;Along vertical direction, two are provided side by side in mixing bowl, and buffer assembly is equipped between two mixing bowls;Buffer assembly includes: with the support frame of mixing bowl connection, along the length direction of mixing bowl, support frame is fixed with fixed shaft, and fixed shaft is just below discharge gate;Two buffer plates, one end is rotatably connected with fixed shaft, and the other end is inclined downward respectively towards the two sides of mixing bowl located below;Cross arm, with support frame connection, cross arm is elastically connected with two buffer plates;Its simple structure, using double mixing bowl to hot recycling mixture is stirred, greatly improves stirring efficiency.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, and in particular to an on-site thermal recycling mixture mixing device. Background Technology

[0002] In-situ thermal recycling technology is an important technology in the field of road maintenance. It involves heating, loosening, and collecting old asphalt pavement, and then mixing it with a certain proportion of new aggregates, recycling agents, or new asphalt mixtures. After on-site mixing, paving, and compaction, the old pavement materials are recycled in situ.

[0003] In the above process, the uniform mixing of old asphalt, aggregates, and recycling agents is a key step in ensuring the quality of recycled mixtures. Currently, common on-site mixing equipment typically uses a single horizontal mixing tank, which is then fed into the paver hopper after mixing. However, this single mixing tank has significant shortcomings: the residence and mixing time of the mixture in a single tank is very short. Within such a limited time, it is impossible to effectively break up old asphalt pavement clumps, achieve uniform distribution of new and old aggregates, and fully coat the old asphalt with the recycling agent.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] This invention provides an on-site thermal recycling mixture mixing device with a simple structure. It uses a double mixing cylinder to stir the thermal recycling mixture, which greatly improves the stirring efficiency and effectively solves the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A mixing device for on-site thermal recycling mixture includes a mixing cylinder with a discharge port at the bottom; two mixing cylinders are arranged side by side along the vertical direction, and a buffer assembly is provided between the two mixing cylinders; The buffer components include: The support frame connected to the mixing tank has a fixed shaft along the length of the mixing tank, and the fixed shaft is located directly below the discharge port. Two buffer plates, one end of which is rotatably connected to a fixed shaft, and the other end is tilted downwards towards the two sides of the mixing cylinder below; The crossbeam is connected to the support frame and is elastically connected to two buffer plates.

[0007] Furthermore, the buffer plate includes: The fixed part is rotatably connected to the fixed shaft; The telescopic part is slidably connected to the fixed part along the width direction of the fixed part. A locking bolt is threaded onto the fixed part to fix the position of the telescopic part.

[0008] Furthermore, the buffer component also includes: The guide plate is fixed to the top of the support frame, and its top height gradually decreases from the center to both sides.

[0009] Furthermore, connecting shafts are fixed on both the crossarm and the fixing part, and the two connecting shafts are arranged opposite each other, with springs fitted on both connecting shafts.

[0010] Furthermore, an installation block is fixed on the outer wall of the mixing tank, the support frame is inserted into the installation block, and two locking bolts are installed on the installation block.

[0011] Furthermore, it also includes an inclined feeding mechanism for supplying hot recycled mixture to the mixing tank above.

[0012] Furthermore, baffles are installed on both sides of the mixing tank below, with the top of the baffles higher than the top of the buffer plate.

[0013] Furthermore, the bottom of the mixing tank is provided with rails on both sides, and the rails are slidably connected to end covers for opening and closing the discharge port; it also includes a power mechanism for driving the end covers to slide.

[0014] The technical solution of this utility model can achieve the following technical effects: the hot recycled mixture is first initially stirred in the upper mixing tank. After completion, its discharge port is opened, and the mixture falls and impacts the "V"-shaped buffer assembly composed of two buffer plates. While dispersing and guiding the material, the buffer plates provide elastic buffering through the crossbeam at the bottom, effectively weakening the impact force and causing the material to slide down along the end of the buffer plate to the vicinity of the inner walls on both sides of the lower mixing tank. Subsequently, the material begins a second round of stirring in the lower mixing tank and is finally discharged through the bottom discharge port. Thus, through two-stage mixing, the total mixing time is significantly extended and the uniformity is improved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural diagram of the on-site thermal recycling mixture mixing device of this utility model; Figure 2 Side view of the two mixing tanks and buffer assembly; Figure 3This is a structural diagram of the mixing tank and buffer assembly located below; Figure 4 for Figure 3 A bottom view; Figure 5 This is a structural diagram of the stirring shaft, support frame, buffer plate, and mounting block; Reference numerals: 1. Mixing cylinder; 2. Buffer assembly; 21. Support frame; 22. Fixed shaft; 23. Crossbeam; 24. Fixed part; 25. Telescopic part; 26. Locking bolt one; 27. Guide plate; 28. Connecting shaft; 29. ​​Spring; 210. Mounting block; 211. Locking bolt two; 3. Feeding mechanism; 4. Baffle; 5. Track; 6. End cover; 7. Power mechanism. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0019] Reference Figures 1-5 This application provides an in-situ thermal recycling mixture mixing device, including a mixing tank 1, the bottom of which is a discharge port. More specifically, see [reference needed]. Figure 1 In this embodiment, the stirring shaft inside the mixing cylinder 1 is arranged along the length direction (front and back direction) of the mixing cylinder 1. The mixing cylinder 1 includes a rectangular segment and a semi-circular segment connected in sequence. In the vertical direction, two mixing cylinders 1 are arranged side by side, and a buffer assembly 2 is provided between the two mixing cylinders 1. In order to facilitate the transportation of hot recycled material in the mixing cylinder 1, the top of the lower mixing cylinder 1 has an opening. When the discharge port of the upper mixing cylinder 1 is opened, the hot recycled material will first fall onto the buffer assembly 2. Under the action of the buffer assembly 2, the hot recycled material will fall to the vicinity of the inner wall of the lower mixing cylinder 1, thereby avoiding direct impact on the stirring shaft and stirring paddle. Buffer component 2 includes: The support frame 21 connected to the mixing tank 1, more specifically, there are two support frames 21, which are fixed on both sides of the mixing tank 1 respectively. In this embodiment, the support frame 21 is fixed on the lower mixing tank 1, and can also be fixed on the upper mixing tank 1. Along the length of the mixing tank 1, the support frame 21 is fixed with a fixed shaft 22, which is located directly below the discharge port; Two buffer plates, one end of which is rotatably connected to the fixed shaft 22, and the other end tilting downwards towards the two sides of the mixing tank 1 below; more specifically, the two buffer plates form a "V" shape, as shown in the figure. Figure 5 One of the buffer plates has a notch along its length for the other buffer plate to rotate. Since the rotation range of the buffer plates is limited, they will not interfere with each other. The crossbeam 23 is located below the buffer plate and is connected to the support frame 21. The crossbeam 23 is elastically connected to the two buffer plates.

[0020] The specific operation process of this device is as follows: The hot recycled mixture is first initially stirred in the upper mixing tank 1. After completion, its discharge port is opened, and the mixture falls and impacts the "V"-shaped buffer assembly 2 composed of two buffer plates. While dispersing and guiding the material, the buffer plates provide elastic buffering through the bottom crossbeam 23, effectively weakening the impact force and causing the material to slide down along the end of the buffer plate to the vicinity of the inner walls on both sides of the lower mixing tank 1. Subsequently, the material begins a second round of stirring in the lower mixing tank 1 and is finally discharged through the bottom discharge port. Thus, through two-stage mixing, the total mixing time is significantly extended and the uniformity is improved. Without the buffer component 2, the mixture falling from the upper mixing tank 1 will impact the mixing shaft and blades inside the lower mixing tank 1, which may cause damage.

[0021] As a preferred embodiment of the above, refer to Figures 2-3 The buffer plate includes: The fixing part 24 is rotatably connected to the fixing shaft 22; The telescopic part 25 is slidably connected to the fixed part 24 along the width direction of the fixed part 24; A locking bolt 26 for fixing the position of the telescopic part 25 is threaded onto the fixing part 24.

[0022] In the above embodiment, the total length of the buffer plate can be adjusted by sliding the telescopic part 25. After adjustment, the buffer plate is fastened to the fixing part 24 by locking bolt 26, so that the buffer plate can flexibly adapt to mixing cylinders 1 of different widths and improve versatility.

[0023] As a preferred embodiment of the above, refer to Figures 2-3 Buffer component 2 also includes: The guide plate 27 is fixed to the top of the support frame 21, and its top height gradually decreases from the center to both sides; In the above embodiment, the guide plate 27 can effectively cover the gap formed between the two fixing parts 24, so that the falling mixture can slide smoothly down its slope and avoid the problem of material getting stuck in the gap.

[0024] As a preferred embodiment of the above, the bottom end of the guide plate 27 abuts against the top of the fixing part 24 to limit the maximum angle of the fixing part 24.

[0025] As a preferred embodiment of the above, refer to Figure 2 A connecting shaft 28 is fixed on both the crossarm 23 and the fixing part 24, and the two connecting shafts 28 are arranged opposite each other. A spring 29 is fitted on each of the two connecting shafts 28. More specifically, the number of connecting shafts 28 and springs 29 can be selected by the user. In the above embodiment, the assembly structure of connecting shaft 28 and spring 29 allows spring 29 to be quickly disassembled and assembled by hand without any tools, simplifying the maintenance and replacement process.

[0026] As a preferred embodiment of the above, refer to Figures 1-2 An installation block 210 is fixed on the outer wall of the mixing tank 1. The support frame 21 is inserted into the installation block 210, and a locking bolt 211 is provided on the installation block 210. In the above embodiment, the support frame 21 is quickly installed and disassembled by inserting and connecting the support frame 21 with the mounting block 210 and fastening it with the second locking bolt 211.

[0027] As a preferred embodiment of the above, refer to Figure 1 It also includes an inclined feeding mechanism 3, which is used to provide hot recycled mixture to the mixing tank 1 located above; In the above embodiment, since the mixing cylinder 1 located above has a certain height, it is equipped with a feeding mechanism 3. The feeding mechanism 3 can be a common belt conveyor or screw conveyor. After manual feeding, the feeding mechanism 3 lifts the hot recycled material into the mixing cylinder 1 above, which greatly reduces the labor intensity of the operators.

[0028] As a preferred embodiment of the above, refer to Figure 3 Both sides of the mixing tank 1 below are equipped with baffles 4, and the top of the baffles 4 is higher than the top of the buffer plate. In the above embodiment, the baffle 4 can effectively prevent the hot recycled material from falling outside the mixing tank 1.

[0029] As a preferred embodiment of the above, refer to Figure 4 The bottom of the mixing tank 1 is provided with rails 5 on both sides, and the rails 5 are slidably connected to end caps 6 for opening and closing the discharge port; it also includes a power mechanism 7 for driving the end caps 6 to slide. In the above embodiments, the power mechanism 7 can be a cylinder, hydraulic cylinder or electric telescopic rod, etc. By controlling the extension and retraction of the output end of the power mechanism 7, the end cover 6 can be controlled to slide on the track 5, thereby controlling the opening of the discharge port and improving the degree of automation.

[0030] It should be noted that the material mixed by the mixing cylinder 1 below is discharged into the paver hopper, so this device needs to be installed at a certain height, or the material is discharged to the conveyor belt and then transported to the paver hopper by the conveyor belt.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An in-situ thermal recycling mixture mixing device, comprising a mixing tank (1), wherein the bottom of the mixing tank (1) is a discharge port; characterized in that, Along the vertical direction, there are two mixing tanks (1) arranged side by side, and a buffer assembly (2) is provided between the two mixing tanks (1). The buffer component (2) includes: The support frame (21) connected to the mixing cylinder (1) has a fixed shaft (22) fixed along the length direction of the mixing cylinder (1), and the fixed shaft (22) is located directly below the discharge port; Two buffer plates, one end of which is rotatably connected to the fixed shaft (22), and the other end is tilted downward toward the two sides of the mixing cylinder (1) below; The crossbeam (23) is connected to the support frame (21), and the crossbeam (23) is elastically connected to the two buffer plates.

2. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, The buffer plate includes: The fixing part (24) is rotatably connected to the fixing shaft (22); The telescopic part (25) is slidably connected to the fixed part (24) along the width direction of the fixed part (24); A locking bolt (26) for fixing the position of the telescopic part (25) is threaded onto the fixing part (24).

3. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, The buffer component (2) further includes: The guide plate (27) is fixed to the top of the support frame (21), and its top height gradually decreases from the center to both sides.

4. The on-site thermal recycling mixture mixing device according to claim 2, characterized in that, Both the crossarm (23) and the fixing part (24) are fixed with connecting shafts (28), and the two connecting shafts (28) are arranged opposite each other, and the two connecting shafts (28) are fitted with springs (29).

5. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, An installation block (210) is fixed on the outer wall of the mixing tank (1). The support frame (21) is inserted into the installation block (210), and a second locking bolt (211) is provided on the installation block (210).

6. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, It also includes an inclined feeding mechanism (3) for providing hot recycled mixture to the mixing tank (1) above.

7. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, Both sides of the mixing tank (1) below are provided with baffles (4), and the top of the baffles (4) is higher than the top of the buffer plate.

8. The on-site thermal recycling mixture mixing device according to claim 1, characterized in that, The mixing tank (1) is provided with rails (5) on both sides of the bottom, and the rails (5) are slidably connected to end caps (6) for opening and closing the discharge port; it also includes a power mechanism (7) for driving the end caps (6) to slide.

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