A mixing device for road maintenance materials

Abstract

The present invention belongs to the technical field of road construction equipment, and in particular relates to a stirring device for road maintenance materials. The present invention provides a bottom motor, a rotating shaft, a stirring column, a discharge pipe, an upper limit frame unit, a conical drive gear, an electric heating rod, a locking shaft unit, and an open rotating barrel unit on the barrel body, thereby making the mixing operation of asphalt and aggregate more convenient and efficient, and the quality of the final maintenance material is also relatively higher. The present invention has the following advantages: the open rotating barrel unit and the locking shaft unit together form an integral structure, and the left and right ends of the integral structure can be respectively tilted upwards, corresponding to the aggregate adding action and the unqualified coarse aggregate pouring action, so that a large amount of unqualified coarse aggregate accumulated after the mixing device uses the aggregate multiple times can be poured out all at once, quickly, and completely.

Description

Technical Field

[0001] The invention belongs to the technical field of road construction equipment, and in particular relates to a stirring device for road maintenance materials. Background Art

[0002] Road maintenance materials primarily refer to asphalt pavement materials. When a road surface cracks, these materials are used to fill gaps in the pavement to prevent further cracking and ensure road safety. There are also several types of asphalt pavement materials, including asphalt concrete, asphalt crushed stone, and old asphalt mixtures.

[0003] Therefore, during the mixing process of asphalt materials, a portion of granular materials, or aggregates, such as crushed stone, old asphalt blocks, steel slag, and slag are generally added. Therefore, this requires the mixing device to have a screening function to prevent the addition of aggregates that are too large, otherwise it will greatly reduce the structural stability of the repaired asphalt strips and blocks themselves.

[0004] The Chinese utility model patent with patent announcement number CN213528282U and announcement date 2021.06.25 discloses a road maintenance material mixing device, including a mixing box, a filter screen is fixedly connected to the mixing box, and two vibration mechanisms cooperating with the filter screen are provided in the mixing box. A rotating shaft is rotatably connected to the mixing box, and a magnetic block cooperating with the vibration mechanism is fixedly connected to the rotating shaft. The inner top surface of the lower end of the mixing box is rotatably connected to the stirring shaft, and a plurality of stirring blades are fixedly connected to the stirring shaft. The mixing box is provided with a transmission mechanism cooperating with the stirring shaft, and a linkage mechanism is provided between the transmission mechanism and the rotating shaft.

[0005] The stirring device in this utility model patent generally operates on the following principle: the motor drives both the stirring blades and the rotating shaft. The former is used to stir the material, and the latter is used to intermittently lift the filter screen so that the filter screen can shake up and down, and the qualified particles on it can fall quickly, while the oversized particles are removed, ultimately ensuring that the quality of the curing material is better and the stirring efficiency is higher.

[0006] However, in actual use, the stirring device still has at least the following three deficiencies, which are the technical problems to be solved by the present invention.

[0007] First, after large particles of unqualified aggregate accumulate on the filter, it is not convenient to remove them all at once. They need to be scraped off on a larger filter, which is very inefficient.

[0008] Second, the driving shaft is a belt, which is on the outside of the equipment. It is not only dangerous, but also causes obvious power loss during transmission.

[0009] Third, the stirring device lacks the necessary asphalt heating structure.

[0010] Therefore, in summary, there is an urgent need for a new asphalt mixing device with more efficient, safer and faster heating and stirring operations. Summary of the Invention

[0011] The present invention provides a stirring device for road maintenance materials. By arranging a bottom motor, a rotating shaft, a stirring column, a discharge pipe, an upper end limit frame unit, a conical drive gear, an electric heating rod, a locking shaft unit, and an open rotating barrel unit on a barrel body, the stirring device can make the stirring operation of asphalt and aggregate more convenient and efficient, and the quality of the final maintenance material is relatively higher.

[0012] The technical solution adopted by the present invention to solve the above problems is: a stirring device for road maintenance materials, the structure of which includes a barrel body, a bottom motor, a rotating shaft, a stirring column, and a discharge pipe, and also includes an upper end limit frame unit arranged on the inner side surface of the barrel body and sleeved on the rotating shaft, a conical drive gear arranged on the rotating shaft and higher than the upper end limit frame unit, an electric heating rod arranged on the upper end limit frame unit, an engaging shaft unit arranged on the upper surface of the upper end limit frame unit, and an open rotating cylinder unit arranged on the engaging shaft unit, meshing with the conical drive gear, and used to drop qualified fine aggregate.

[0013] A further preferred technical solution is that the upper end limit frame unit includes a first limit ring which is sleeved on the rotating shaft and higher than all the stirring columns, two radial connecting plates with one end arranged on the first limit ring and the other end arranged on the inner side of the barrel body, and an arc-shaped plate which is arranged on one of the radial connecting plates and is used to install the electric heating rod and receive unqualified coarse aggregate that falls accidentally.

[0014] A further preferred technical solution is that the discharge pipe and the electric heating rod are arranged on the same side of the barrel body, the bottom motor is arranged on the other side of the barrel body, and the circular stirring area of the stirring column is arranged in an eccentric position relationship with the circular barrel body.

[0015] A further preferred technical solution is that the locking shaft unit includes a total of 4 support plates, which are arranged in pairs on the two radial connecting plates, a U-shaped groove arranged on the support plate and used to lift the open rotating cylinder unit at one end, a support column arranged on the U-shaped groove, and a radial shaft arranged on the two support columns and used to install the open rotating cylinder unit.

[0016] A further preferred technical solution is that the open rotating cylinder unit includes a cylinder bottom plate sleeved on the radial shaft, an open-hole cylinder arranged on the cylinder bottom plate and used to drop qualified fine aggregate, a cylinder cover plate arranged on the open-hole cylinder and sleeved on the radial shaft, and opened when the open-hole cylinder is performing a feeding operation and an unqualified coarse aggregate is discharged, and a bevel driven gear arranged on the cylinder bottom plate and meshing with the bevel drive gear.

[0017] A further preferred technical solution is that the open rotating cylinder unit further includes a protruding plate arranged on the inner side of the open hole cylinder and used for turning over the aggregate.

[0018] A further preferred technical solution is that the open rotating cylinder unit further includes a push-pull rod which is plugged into the cylinder bottom plate and the protruding plate and connects the cylinder cover plate and the conical driven gear.

[0019] A further preferred technical solution is that the open rotating cylinder unit also includes an internal threaded ring groove arranged on the open hole cylinder and used to install the cylinder cover plate, and an external threaded ring sleeved on the radial shaft and connected to the internal threaded ring groove and used to fix the cylinder cover plate.

[0020] A further preferred technical solution is that the engaging shaft unit further includes a second limiting ring provided on the radial shaft and used for engaging and fixing the cylinder bottom plate or the support column.

[0021] A further preferred technical solution is that: the engaging shaft unit further includes a mounting hole provided on the support column and used for inserting the radial shaft.

[0022] The present invention has the following advantages.

[0023] First, the open rotating cylinder unit and the engaging shaft unit together form an integral structure, and the left and right ends of the integral structure can be respectively tilted upward, corresponding to the action of adding aggregate and pouring out unqualified coarse aggregate. Therefore, a large amount of unqualified coarse aggregate accumulated after the mixing device uses the aggregate multiple times can be poured out all at once, quickly and completely.

[0024] Second, the bottom motor ultimately drives the open rotating barrel unit to rotate and unload materials, which mainly relies on the two bevel gears inside the barrel. Therefore, this transmission structure is very safe and has low power loss.

[0025] Third, the electric heating rod is located above the discharge pipe. Like the circular stirring zone, it is set in an eccentric position in the barrel to ensure that the stirring action does not interfere with the heating action, a sufficient number of electric heating rods can be set on the lower surface of the curved plate, and the space utilization rate in the barrel is maximized.

[0026] Fourth, the rotation of the rotating shaft is not easy to shake left and right, the open rotating cylinder unit will not accidentally slide on the engaging shaft unit when it is tilted to load and unload materials, and the cylinder cover is not easy to accidentally open when the open rotating cylinder unit rotates to unload materials.

[0027] Fifth, the radial axis can be fixed or rotated together with the open rotating cylinder unit, making the rotary screening of aggregate more flexible and more efficient than vibrating screening.

[0028] Sixth, the engagement and disengagement operations between the bevel driven gear and the bevel driving gear are very convenient, and the two gears are not prone to accidental collision when disengaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] Figure 2 Schematic diagram of the position structure of the upper end limit frame unit in the present invention from a top view.

[0031] Figure 3 Schematic diagram of the position of the electric heating rod in the present invention.

[0032] Figure 4 Schematic diagram of the position structure of the engaging shaft unit in the present invention.

[0033] Figure 5 It is a structural schematic diagram of the open rotating cylinder unit in the present invention.

[0034] Figure 6 This is a schematic diagram of one of the position structures of the second limiting ring and the mounting hole in the present invention.

[0035] In the accompanying drawings, the meanings of the reference numerals are as follows: barrel a, bottom motor b, rotating shaft c, stirring column d, discharge pipe e, circular stirring zone f, aggregate g;

[0036] Upper end limit frame unit 1, conical drive gear 2, electric heating rod 3, engaging shaft unit 4, open rotating cylinder unit 5, first limit ring 101, radial connecting plate 102, arc plate 103, support plate 401, U-shaped groove 402, support column 403, radial shaft 404, cylinder bottom plate 501, open cylinder 502, cylinder cover plate 503, conical driven gear 504, protruding plate 505, push-pull rod 506, internal thread ring groove 507, external thread ring 508, second limit ring 405, mounting hole 406. DETAILED DESCRIPTION

[0037] The following description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

[0038] As attached Figure 1-6 As shown, a stirring device for road maintenance materials comprises a barrel body a, a bottom motor b, a rotating shaft c, a stirring column d, and a discharge pipe e, and further comprises an upper end limit frame unit 1 arranged on the inner side surface of the barrel body a and sleeved on the rotating shaft c, a conical drive gear 2 arranged on the rotating shaft c and higher than the upper end limit frame unit 1, an electric heating rod 3 arranged on the upper end limit frame unit 1, an engaging shaft unit 4 arranged on the upper surface of the upper end limit frame unit 1, and an open rotating cylinder unit 5 arranged on the engaging shaft unit 4, meshing with the conical drive gear 2, and used for dropping qualified fine aggregate.

[0039] In this embodiment, the barrel a is open and is used for pouring asphalt material. The bottom motor b is a reduction motor that drives the stirring column d to ensure the stirring effect of the basic asphalt curing material.

[0040] In addition, the aggregate to be screened is placed in the open rotating cylinder unit 5 and is indirectly driven to rotate by the bottom motor b. Compared with vibrating screening, the efficiency of rotary screening can be greatly improved.

[0041] Finally, the open rotating drum unit 5 can be opened and closed at one end and fixed at the other end. Furthermore, it can be tilted along with the engaging shaft unit 4, either at the left or right end, corresponding to the action of adding aggregate or pouring out unqualified coarse aggregate, respectively. Therefore, after long-term use of the mixing device, unqualified coarse aggregate trapped in the open rotating drum unit 5 can be removed and cleared all at once, without the need for scraping, which is very convenient and efficient.

[0042] The upper end limiting frame unit 1 includes a first limiting ring 101 which is sleeved on the rotating shaft c and is higher than all the stirring columns d, two radial connecting plates 102 with one end set on the first limiting ring 101 and the other end set on the inner side of the barrel body a, and an arc-shaped plate 103 which is set on one of the radial connecting plates 102 and is used to install the electric heating rod 3 and receive unqualified coarse aggregate that falls accidentally.

[0043] In this embodiment, the two radial connecting plates 102 are aligned and straight, and the size of the arc-shaped plate 103 is as large as possible to ensure that it has at least the following two advantages.

[0044] First, when the open rotating drum unit 5 pours out unqualified coarse aggregate, its opening is tilted downward on the side of the curved plate 103. A receiving tray is placed at the opening. However, there is still a theoretical risk that unqualified coarse aggregate will fall directly back into the barrel a. Therefore, the curved plate 103 is made as large as possible to catch any unqualified coarse aggregate that accidentally leaks out, thus preventing such accidents.

[0045] Second, the larger the curved plate 103 is, the more electric heating rods 3 can be installed on its lower surface, ensuring that the asphalt curing material can be fully and appropriately heated.

[0046] The discharge pipe e and the electric heating rod 3 are arranged on the same side of the barrel body a, the bottom motor b is arranged on the other side of the barrel body a, and the circular stirring area f of the stirring column d is arranged in an eccentric position relationship with the circular barrel body a.

[0047] In this embodiment, the stirring column d does not hit the electric heating rod 3 when rotating. The electric heating rod 3 is located above the discharge pipe e. Figure 1 The asphalt curing material is placed on the left side of the figure, while the asphalt curing material is more conveniently added on the right side of the figure. Therefore, the asphalt curing material can be kept at a relatively high temperature before being discharged. To a certain extent, the temperature of the falling asphalt curing material should be high rather than low.

[0048] The engaging shaft unit 4 includes a total of four support plates 401, which are arranged in pairs on the two radial connecting plates 102, a U-shaped groove 402 arranged on the support plate 401 and used to lift the open rotating cylinder unit 5 at one end, a support column 403 arranged on the U-shaped groove 402, and a radial shaft 404 arranged on the two support columns 403 and used to install the open rotating cylinder unit 5.

[0049] In this embodiment, the U-shaped groove 402 is open at the top and has a curved inner bottom surface at the bottom, thereby ensuring a stable placement of the support column 403 and allowing the support column 403 to tilt upward. Of course, the U-shaped groove 402 and the support column 403 cannot fit perfectly, and the width of the former needs to be slightly larger, otherwise the support column 403 will not be able to tilt up and will instead be stuck.

[0050] In addition, during the process of the open rotating cylinder unit 5 rotating to drop qualified aggregate, the radial shaft 404 may rotate or not rotate.

[0051] The open rotating cylinder unit 5 includes a cylinder bottom plate 501 that is sleeved on the radial shaft 404, an open-hole cylinder 502 that is arranged on the cylinder bottom plate 501 and is used to drop qualified fine aggregate, a cylinder cover plate 503 that is arranged on the open-hole cylinder 502 and sleeved on the radial shaft 404 and is opened when the open-hole cylinder 502 is performing a feeding operation and an unqualified coarse aggregate is discharged, and a bevel driven gear 504 that is arranged on the cylinder bottom plate 501 and meshes with the bevel drive gear 2.

[0052] In this embodiment, the aggregate that can fall from the opening of the open hole cylinder 502 is qualified aggregate, whereas the aggregate with too large a particle size is unqualified aggregate.

[0053] In addition, the opening on the cylinder bottom plate 501 can be simply sleeved with the radial shaft 404, or can be sleeved and then welded. In other words, the open rotating cylinder unit 5 can rotate relatively on the radial shaft 404, but absolutely cannot slide left or right relative to each other.

[0054] Therefore, the bevel driven gear 504 must be able to slide left and right relative to the perforated cylinder 502, that is, before the perforated cylinder 502 rotates, the bevel driven gear 504 must be in contact and engaged with the bevel driving gear 2, otherwise the gear will be damaged.

[0055] The open rotating cylinder unit 5 further includes a protruding plate 505 provided on the inner side of the open hole cylinder 502 and used for turning over the aggregate.

[0056] In this embodiment, the protruding plate 505 can increase the degree of turning over of the aggregate g, ensuring that the aggregate g can fall more quickly.

[0057] The open rotating cylinder unit 5 further includes a push-pull rod 506 which is inserted into the cylinder bottom plate 501 and the protruding plate 505 and connects the cylinder cover plate 503 and the bevel driven gear 504 .

[0058] In this embodiment, both the cylinder bottom plate 501 and the protruding plate 505 have openings for inserting the push-pull rod 506, and the push-pull rod 506 is made of rubber with medium elasticity to ensure that it is difficult to slide spontaneously on the opening.

[0059] Finally, the method of using the push-pull rod 506 is as follows.

[0060] First, with the Figure 4 For example, the push-pull rod 506 first moves to the left to separate the conical driven gear 504 and the conical driving gear 2. At this time, the cylinder cover 503 is opened and the aggregate is smoothly put in.

[0061] Second, the cylinder cover 503 is then closed, but the push-pull rod 506 cannot be pushed to the right to ensure that the aggregate does not leak out.

[0062] Third, after the radial shaft 404 is laid flat and steady, the push-pull rod 506 is pushed to the right to the bottom. During this process, the open rotating cylinder unit 5 itself rotates and fine-tunes appropriately to ensure that the conical driven gear 504 and the conical driving gear 2 are smoothly engaged. At this time, the conical driven gear 504 has a clamping effect at least on the cylinder bottom plate 501 and the protruding plate 505, and is not easy to retreat to the left.

[0063] Fourth, when adding aggregate to the open cylinder 502 or pouring out a large amount of unqualified coarse aggregate, the push-pull rod 506 is pushed and pulled to the left to first separate the conical driven gear 504 and the conical driving gear 2, and finally the support column 403 on the left is lifted to add aggregate, and the support column 403 on the right is lifted to pour out the unqualified coarse aggregate.

[0064] The open rotating cylinder unit 5 also includes an internal threaded ring groove 507 arranged on the open hole cylinder 502 and used to install the cylinder cover 503, and an external threaded ring 508 that is sleeved on the radial shaft 404, connected to the internal threaded ring groove 507, and used to fix the cylinder cover 503.

[0065] In this embodiment, the function of the external threaded ring 508 is to supplement and strengthen the friction clamping force between the push-pull rod 506 and the openings of the cylinder bottom plate 501 and the protruding plate 505, so as to ensure that when the open rotating cylinder unit 5 rotates to drop aggregate, the conical driven gear 504 is almost impossible to accidentally separate from the conical driving gear 2.

[0066] In addition, when the bevel driven gear 504 needs to be actively separated from the bevel driving gear 2 , the external thread ring 508 is first screwed out of the internal thread ring groove 507 , and then the push-pull rod 506 is pushed and pulled.

[0067] Of course, the push-pull action cannot directly act on the push-pull rod 506 , but can push and pull the conical driven gear 504 or the cylinder cover 503 .

[0068] The engaging shaft unit 4 further includes a second limiting ring 405 provided on the radial shaft 404 and used to engage and fix the cylinder bottom plate 501 or the support column 403. The engaging shaft unit 4 further includes a mounting hole 406 provided on the support column 403 and used to insert the radial shaft 404.

[0069] In this embodiment, relative sliding left and right is prohibited between the cylindrical bottom plate 501 and the radial shaft 404, so the opening of the former can be welded to the latter, or two left and right second limiting rings 405 are provided on the latter to clamp the cylindrical bottom plate 501.

[0070] If welding is used, the radial shaft 404 rotates together with the open rotating cylinder unit 5, and the mounting hole 406 is a necessary structure. The second limiting ring 405 needs to support the support column 403, and the radial shaft 404 cannot be displaced relative to the support column 403.

[0071] If the cylinder bottom plate 501 is clamped by two second limiting rings 405, then the second limiting ring 405 supporting the support column 403 is unnecessary, and the mounting hole 406 is also unnecessary. It is preferred to directly weld the support column 403 and the radial shaft 404 to each other.

[0072] Finally, the conical driven gear 504 is provided with a central hole for the radial shaft 404 to pass through, ensuring that both modes of whether the radial shaft 404 rotates together with the open rotating cylinder unit 5 are established.

[0073] In other words, the push-pull rod 506 is an essential position in the process of motor power transmission, and its material is a metal rod covered with rubber.

[0074] While the embodiments of the present invention have been described in detail above with reference to the accompanying drawings, the present invention is not limited to the aforementioned embodiments. Various modifications are possible within the scope of knowledge possessed by a person skilled in the art without departing from the spirit of the present invention. These modifications are non-inventive and are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A stirring device for road maintenance materials, comprising a barrel (a), a bottom motor (b), a rotating shaft (c), a stirring column (d), and a discharge pipe (e), characterized in that: It also includes an upper end limit frame unit (1) arranged on the inner side surface of the barrel body (a) and sleeved with the rotating shaft (c), a conical driving gear (2) arranged on the rotating shaft (c) and higher than the upper end limit frame unit (1), an electric heating rod (3) arranged on the upper end limit frame unit (1), a locking shaft unit (4) arranged on the upper surface of the upper end limit frame unit (1), and an open rotating barrel unit (5) arranged on the locking shaft unit (4) and meshing with the conical driving gear (2) and used for dropping qualified fine aggregate. The upper end limiting frame unit (1) comprises a first limiting ring (101) sleeved on the rotating shaft (c) and higher than all the stirring columns (d), two radial connecting plates (102) with one end provided on the first limiting ring (101) and the other end provided on the inner side surface of the barrel (a), and an arc-shaped plate (103) provided on one of the radial connecting plates (102) and used for mounting the electric heating rod (3) and receiving unqualified coarse aggregate that is accidentally dropped. The engaging shaft unit (4) comprises four supporting plates (401) arranged in pairs on the two radial connecting plates (102), a U-shaped groove (402) arranged on the supporting plates (401) and used to lift the open rotating cylinder unit (5) at one end, a supporting column (403) arranged on the U-shaped groove (402), and a radial shaft (404) arranged on the two supporting columns (403) and used to install the open rotating cylinder unit (5).

2. A stirring device for road maintenance materials according to claim 1, characterized in that: The discharge pipe (e) and the electric heating rod (3) are arranged on the same side of the barrel body (a), the bottom motor (b) is arranged on the other side of the barrel body (a), and the circular stirring area (f) of the stirring column (d) is arranged in an eccentric position relationship with the circular barrel body (a).

3. A stirring device for road maintenance materials according to claim 1, characterized in that: The open rotating cylinder unit (5) comprises a cylinder bottom plate (501) sleeved on the radial shaft (404), an open-hole cylinder (502) arranged on the cylinder bottom plate (501) and used for dropping qualified fine aggregate, a cylinder cover plate (503) arranged on the open-hole cylinder (502) and sleeved on the radial shaft (404) and opened when the open-hole cylinder (502) is performing a feeding operation and an unqualified coarse aggregate is discharged, and a conical driven gear (504) arranged on the cylinder bottom plate (501) and meshing with the conical drive gear (2).

4. A stirring device for road maintenance materials according to claim 3, characterized in that: The open rotating cylinder unit (5) further comprises a protruding plate (505) arranged on the inner side of the perforated cylinder (502) and used for turning over aggregate.

5. A stirring device for road maintenance materials according to claim 4, characterized in that: The open rotating cylinder unit (5) further comprises a push-pull rod (506) which is plugged into the cylinder bottom plate (501) and the protruding plate (505) and connects the cylinder cover plate (503) and the conical driven gear (504).

6. A stirring device for road maintenance materials according to claim 3, characterized in that: The open rotating cylinder unit (5) further comprises an internal threaded ring groove (507) provided on the perforated cylinder (502) and used for mounting the cylinder cover (503), and an external threaded ring (508) sleeved on the radial shaft (404), connected to the internal threaded ring groove (507), and used for fixing the cylinder cover (503).

7. A stirring device for road maintenance materials according to claim 3, characterized in that: The engaging shaft unit (4) further comprises a second limiting ring (405) provided on the radial shaft (404) and used for engaging and fixing the cylinder bottom plate (501) or the support column (403).

8. A stirring device for road maintenance materials according to claim 7, characterized in that: The engaging shaft unit (4) further comprises a mounting hole (406) provided on the support column (403) and used for inserting the radial shaft (404).

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