CN108748670B - Thermal insulation concrete mixer - Google Patents

Abstract

The invention provides a heat preservation type concrete stirring device which comprises a stirring drum, a central stirrer, a first planetary stirrer, a second planetary stirrer and a driving mechanism, wherein the central stirrer is arranged on the stirring drum; the outer side wall of the mixing drum sinks along the radial direction of the mixing drum to form an annular groove, a heating coil is arranged in the annular groove, a heat conduction insulating layer is arranged between the heating coil and the wall of the annular groove, and an insulating heat insulation drum is sleeved outside the mixing drum; the central stirrer is coaxially arranged with the stirring drum, the central stirrer, the first planetary stirrer and the second planetary stirrer are arranged in parallel and are all connected with the driving mechanism, the driving mechanism drives the central stirrer to rotate around the axis of the stirring drum, and the driving mechanism also drives the first planetary stirrer to revolve around the axis of the stirring drum and rotate around the rotation axis of the first planetary stirrer; the uniformity of the final concrete can be effectively ensured, and the temperature balance of the concrete can be ensured.

Description

Thermal insulation concrete mixer

technical field

The invention relates to a mixing device, in particular to a heat-insulating concrete mixing device.

Background technique

Concrete is a commonly used building material. Concrete is formed by mixing sand, cement, crushed stone and water. Concrete mixing is realized by a mixer. The existing concrete mixer has the following defects: during the concrete mixing process, the The concrete near the mixing paddle can be fully stirred, but the concrete far away from the mixing paddle cannot be fully stirred, especially the concrete near the side wall of the container of the mixer, which often causes deposition, which seriously affects the quality of the concrete On the other hand, because the performance of concrete will be affected by temperature, the existing mixer cannot maintain the temperature of concrete, especially in low temperature environment, the temperature is too low will lead to freeze-thaw damage of concrete, thereby reducing the performance of concrete, seriously affecting Build quality.

Therefore, in order to solve the above technical problems, it is urgent to propose a new stirring device.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a thermal insulation concrete mixing device, which can fully mix the concrete in the mixing container, and there is no mixing dead angle during the mixing process, so that the final uniformity of the concrete can be effectively guaranteed, Moreover, it is possible to keep the concrete within a temperature range of interest in a low-temperature environment, and to ensure the temperature uniformity of the concrete, thereby ensuring the quality of the concrete.

The invention provides a heat preservation concrete mixing device, comprising a mixing drum, a central mixer, a first planetary mixer, a second planetary mixer and a drive mechanism;

The outer side wall of the mixing drum sinks along the radial direction of the mixing drum to form an annular groove, a heating coil is arranged in the annular groove, and a thermally conductive insulating layer is arranged between the heating coil and the groove wall of the annular groove. The outer casing of the cylinder is also provided with an insulating and heat-insulating cylinder;

The central agitator and the mixing drum are arranged coaxially, and the central agitator, the first planetary agitator and the second planetary agitator are arranged in parallel and are all connected with the driving mechanism, and the driving mechanism drives the central agitator around the mixing drum. The axis rotates, and the driving mechanism also drives the first planetary agitator to revolve around the axis of the mixing drum and rotate around its own rotation axis;

The structures of the first planetary agitator and the central agitator are the same. The central agitator includes a rotating shaft and a spiral stirring blade arranged in the middle and lower part of the rotation. The spiral stirring blade includes a first spiral blade and a second spiral blade. The helical radius of the first helical sheet is larger than the helical radius of the second helical sheet, and the first helical sheet and the second helical sheet are alternately arranged along the axial direction of the rotating shaft;

The second planetary agitator includes a planetary stirring shaft and a stirring plate, the stirring plate is fixedly arranged on the planetary stirring shaft, and the second planetary agitator is fixedly arranged on the driving mechanism.

Further, the drive mechanism includes a planetary gear assembly, a drive motor, a reducer and a planet carrier;

The planetary gear assembly includes a ring gear, a sun gear and three planetary gears, the sun gear and the ring gear are coaxially arranged, the three planetary gears are evenly arranged along the circumferential direction of the sun gear, and the three planetary gears are all connected with the sun gear and the sun gear. Ring gear meshing;

The power output end of the drive motor is drive-connected with the power output end of the reducer, the power output end of the reducer is drive-connected with the gear shaft of the sun gear, and the upper end of the rotating shaft of the first planetary agitator passes through the planet carrier and Connected with one of the three planetary gears, the rotating shaft of the first planetary agitator is rotatably matched with the planetary carrier; the upper end of the rotating shaft of the central agitator passes through the planetary carrier and is coaxially connected with the sun gear, and the central stirring The rotating shaft of the agitator is fixedly matched with the planetary carrier, and the upper end of the planetary stirring shaft of the second planetary agitator is fixedly arranged on the planetary carrier.

Further, the planet carrier includes a shaft sleeve and three beams, the shaft sleeve is fixedly sleeved on the rotating shaft of the central agitator, one end of the three beams is fixedly connected with the outer side wall of the shaft sleeve, and the length of the three beams is The extension direction of the center line of the direction is compared with the axis of the bushing, and the three beams are evenly arranged around the circumferential direction of the bushing;

The other ends of the three beams are fixedly provided with support columns, the support columns are perpendicular to the beams, and the lower ends of the support columns are rotatably matched with the mixing drum.

Further, the outer side wall of the upper end of the mixing drum is sunk along the axial direction of the mixing drum to form a shoulder, a thrust bearing is fixed on the shoulder, the lower shaft ring of the thrust bearing is fixedly connected with the shoulder, and the thrust bearing is The upper surface of the upper shaft ring is fixedly connected with the support column.

Further, one of the three beams is provided with a shaft hole, the rotating shaft of the first planetary agitator passes through the shaft hole, a rotating bearing is arranged between the rotating shaft of the first planetary agitator and the shaft hole, A support plate is fixed on the lower surface of the beam of the shaft hole, and the support plate is provided with a through hole for the rotation shaft of the first planetary agitator to pass through, and the diameter of the through hole is smaller than that of the shaft hole.

Further, the stirring plate of the second planetary agitator has an arc-shaped plate structure, and the length direction of the stirring plate has an included angle with the axis of the planetary stirring shaft.

Further, the bottom of the mixing drum is provided with a discharge port.

The beneficial effects of the present invention: through the mixing device of the present invention, the structure of the first planetary agitator rotating and revolving around the axis of the mixing drum combined with the stirring action of the central agitator can fully mix the concrete in the entire mixing drum, and The structure of the spiral mixing blades of the first planetary mixer and the center mixer can not only promote the horizontal mixing of concrete, but also realize the vertical mixing of concrete. The function of the second planetary mixer can fully promote the movement of concrete in the mixing drum. , so that there is no mixing dead angle in the entire mixing drum, thereby effectively improving the mixing performance of the entire mixing device and effectively ensuring the uniformity of the concrete; moreover, through the structure of the mixing drum, the mixing device can keep the concrete at a suitable temperature in a low temperature environment Within the range, and under the action of the central mixer and the two planetary mixers, the temperature of the concrete in the entire mixing drum is well balanced, so that the quality of the concrete can be effectively ensured, thereby improving the quality of the building.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described:

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of the planetary gear assembly of the present invention.

FIG. 3 is a schematic top view structure diagram of the planet carrier of the present invention.

FIG. 4 is a schematic structural diagram of the stirring plate of the second planetary stirrer.

Detailed ways

The present invention is further described in detail below in conjunction with the accompanying drawings of the description, as shown in the figure:

The heat preservation concrete mixing device provided by the present invention comprises a mixing drum 1, a central mixer, a first planetary mixer, a second planetary mixer and a drive mechanism;

The outer side wall of the mixing drum 1 sinks along the radial direction of the mixing drum to form an annular groove 4 . Insulation layer 8, described mixing drum 1 is also covered with insulation and heat insulation cylinder 5; wherein the thermal insulation layer is made of existing thermal insulation materials, such as thermally conductive silica gel, biphenyl tetracarboxylic dianhydride and diphenyl ether diamine ( R-type) or m-phenylenediamine (S-type) materials, etc.; insulation and heat insulation cylinders are made of existing insulation and heat insulation materials, such as ceramic fibers;

The central agitator is arranged coaxially with the mixing drum 1, and the central agitator, the first planetary agitator and the second planetary agitator are arranged in parallel and are all connected with the driving mechanism, and the driving mechanism drives the central agitator to surround the mixing drum. The axis rotates, and the drive mechanism also drives the first planetary agitator to revolve around the axis of the mixing drum and rotate around its own axis of rotation;

The structures of the first planetary agitator and the central agitator are the same. The central agitator includes a rotating shaft 20 and a spiral stirring blade arranged in the middle and lower part of the rotating shaft 20. Two helical sheets 72, the helical radius of the first helical sheet 71 is larger than the helical radius of the second helical sheet 72, the first helical sheet 71 and the second helical sheet 72 are alternately arranged along the axial direction of the rotating shaft; The shaft is coaxial with the mixing drum;

The second planetary agitator includes a planetary stirring shaft 22 and a stirring plate 2, the stirring plate 2 is fixedly arranged on the planetary stirring shaft 22, and the second planetary agitator is fixedly arranged on the driving mechanism; The structure of the planetary agitator rotating and revolving around the axis of the mixing drum combined with the stirring action of the central agitator can fully mix the concrete in the entire mixing drum. , not only can promote the horizontal mixing of concrete, but also can realize the vertical mixing of concrete, the function of the second planetary mixer can fully promote the movement of concrete in the mixing drum, so that there is no mixing dead angle in the whole mixing drum, thus effectively improving the overall The mixing performance of the mixing device can effectively ensure the uniformity of the concrete; moreover, through the structure of the mixing drum, the mixing device can keep the concrete within a suitable temperature range in a low temperature environment, and the central mixer and the two planetary mixers Under the action of the mixing drum, the temperature balance of the concrete in the whole mixing drum is good, so that the quality of the concrete can be effectively ensured, and the quality of the building can be improved.

In this embodiment, the drive mechanism includes a planetary gear assembly 16, a drive motor 17, a reducer 18 and a planet carrier;

The planetary gear assembly 16 includes a ring gear 161, a sun gear 163 and three planetary gears 162. The sun gear 163 and the ring gear 161 are coaxially arranged. The three planetary gears 162 are evenly arranged along the circumference of the sun gear 163 and the three All planetary gears mesh with the sun gear and the ring gear;

The power output end of the drive motor 17 is drivingly connected with the power output end of the reducer 18, the power output end of the reducer 18 is drivingly connected with the gear shaft of the sun gear 163, and the upper end of the rotating shaft 21 of the first planetary agitator Passing through the planet carrier and drivingly connected with one of the three planetary gears, the rotating shaft 21 of the first planetary agitator is rotatably matched with the planetary carrier; the upper end of the rotating shaft 20 of the central agitator passes through the planetary carrier and is connected with the sun gear Coaxial transmission connection, the rotating shaft of the central agitator is fixedly matched with the planetary carrier, the upper end of the planetary stirring shaft of the second planetary agitator is fixedly arranged on the planetary carrier, and the stirring shaft of the second planetary agitator is fixed with the first planetary agitator The axes of rotation are located on different beams.

The planet carrier includes a shaft sleeve 19 and three beams 12 , the shaft sleeve 19 is fixedly sleeved on the rotating shaft 20 of the central agitator, and one end of the three beams 12 is fixedly connected to the outer side wall of the shaft sleeve 19 And the extension direction of the center line of the length direction of the three beams 12 is compared with the axis of the shaft sleeve 19, and the three beams are evenly arranged around the circumferential direction of the shaft sleeve;

The other ends of the three beams 12 are fixedly provided with a support column 11, the support column 11 is perpendicular to the beam 12, and the lower end of the support column 11 is rotated and matched with the mixing drum 1. Through the above structure, on the one hand, it can be ensured that the central agitator can be stirred around the center agitator. The axis of the drum rotates, and on the other hand, it can effectively drive the first planetary agitator to rotate and revolve around the rotation axis of the central agitator, so as to ensure the adequacy of concrete mixing. Of course, the first planetary mixer and the second planetary mixer Set on different beams, so as to avoid the running conflict of the two planetary agitators.

In this embodiment, the outer side wall of the upper end of the mixing drum 1 is sunk along the axial direction of the mixing drum to form a shoulder 9, and a thrust bearing 10 is fixed on the shoulder 9, and the lower shaft ring of the thrust bearing 10 is connected to the The shoulder is fixedly connected, and the upper surface of the upper shaft ring of the thrust bearing 10 is fixedly connected to the support column. Through this structure, a force support point can be provided for the planet carrier, so that the entire drive mechanism can operate normally.

In this embodiment, one of the three beams 12 is provided with a shaft hole 23 , the rotating shaft 21 of the first planetary agitator passes through the shaft hole 23 , and the rotating shaft 21 of the first planetary agitator and the shaft hole A rotating bearing 14 is provided, and a supporting plate 13 is fixedly arranged on the lower surface of the beam 12 provided with the shaft hole 23, and the supporting plate 13 is provided with a through hole 15 for the rotating shaft of the first planetary agitator to pass through. The diameter of the through hole 15 is smaller than the diameter of the shaft hole 23 . With this structure, it can be effectively ensured that the first planetary agitator can rotate and revolve, wherein the support plate is used to limit the position of the rotating bearing.

In this embodiment, the stirring plate 2 of the second planetary agitator is an arc-shaped plate structure, and the length direction of the stirring plate 2 and the axis of the planetary stirring shaft 22 have an included angle. The mixing shafts of the two planetary mixers are fixedly connected, and the other opposite side of the mixing plate affects the inner side wall of the mixing drum and has a certain gap with the inner side wall of the mixing drum. The gap should not be too small to prevent jamming due to the influence of gravel, cement, etc. Generally speaking, the gap should be slightly smaller than the diameter of the gravel required in the concrete, and the mixing plates of the second planetary mixer are multiple They are arranged at equal intervals along the axis of the stirring shaft, and the direction of the concave arc surface of the stirring plate faces the rotation direction of the planet carrier. Through this structure, on the one hand, due to the gap between the stirring plates, the rotation resistance can be reduced to a certain extent. On the other hand, it can ensure that the concrete is fully mixed and avoid the occurrence of mixing dead angles.

In this embodiment, the bottom of the mixing drum is provided with a discharge port 3, which is convenient for discharging the fully stirred coagulation; the discharge port is closed during the feeding and stirring process, and the discharge port adopts the existing Some structures are implemented.

The fixing in the above is all by welding, which can ensure the structural strength, and the upper and lower parts in the above are all taken as a reference.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions without departing from the spirit and scope of the technical solutions of the present invention should be included in the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a heat preservation formula concrete mixing device which characterized in that: the device comprises a mixing drum, a central stirrer, a first planetary stirrer, a second planetary stirrer and a driving mechanism;

the outer side wall of the mixing drum sinks along the radial direction of the mixing drum to form an annular groove, a heating coil is arranged in the annular groove, a heat conduction insulating layer is arranged between the heating coil and the wall of the annular groove, and an insulating heat insulation drum is sleeved outside the mixing drum;

the central stirrer is coaxially arranged with the stirring drum, the central stirrer, the first planetary stirrer and the second planetary stirrer are arranged in parallel and are all connected with the driving mechanism, the driving mechanism drives the central stirrer to rotate around the axis of the stirring drum, and the driving mechanism also drives the first planetary stirrer to revolve around the axis of the stirring drum and rotate around the rotation axis of the first planetary stirrer;

the structure of the first planetary stirrer is the same as that of the central stirrer, the central stirrer comprises a rotating shaft and a spiral stirring blade arranged at the middle lower part of the rotating shaft, the spiral stirring blade comprises a first spiral sheet and a second spiral sheet, the spiral radius of the first spiral sheet is larger than that of the second spiral sheet, and the first spiral sheet and the second spiral sheet are alternately arranged along the axial direction of the rotating shaft;

the second planetary stirrer comprises a planetary stirring shaft and a stirring plate, the stirring plate is fixedly arranged on the planetary stirring shaft, and the second planetary stirrer is fixedly arranged on the driving mechanism;

the driving mechanism comprises a planetary gear assembly, a driving motor, a speed reducer and a planet carrier;

the planetary gear assembly comprises a gear ring, a sun gear and three planet gears, the sun gear and the gear ring are coaxially arranged, the three planet gears are uniformly arranged along the circumferential direction of the sun gear, and the three planet gears are all meshed with the sun gear and the gear ring;

the power output end of the driving motor is in transmission connection with the power output end of the speed reducer, the power output end of the speed reducer is in transmission connection with a gear shaft of the sun gear, the upper end of a rotating shaft of the first planetary stirrer penetrates through the planet carrier and is in transmission connection with one of the three planet gears, and the rotating shaft of the first planetary stirrer is in rotating fit with the planet carrier; the upper end of a rotating shaft of the central stirrer penetrates through the planet carrier and is in coaxial transmission connection with the sun gear, the rotating shaft of the central stirrer is fixedly matched with the planet carrier, and the upper end of a planetary stirring shaft of the second planetary stirrer is fixedly arranged on the planet carrier;

the stirring plate of the second planetary stirrer is of an arc-shaped plate structure, and an included angle is formed between the length direction of the stirring plate and the axis of the planetary stirring shaft.

2. The insulated concrete mixing apparatus of claim 1, wherein: the planet carrier comprises a shaft sleeve and three cross beams, the shaft sleeve is fixedly sleeved on a rotating shaft of the central stirrer, one ends of the three cross beams are fixedly connected with the outer side wall of the shaft sleeve, the extending direction of the central line of the three cross beams in the length direction is relative to the axis of the shaft sleeve, and the three cross beams are uniformly arranged around the circumference direction of the shaft sleeve;

the other end of the three beams is fixedly provided with a support column, the support column is perpendicular to the beams, and the lower ends of the support columns are in running fit with the mixing drum.

3. The insulated concrete mixing apparatus of claim 2, wherein: the outer side wall of the upper end of the stirring cylinder sinks along the axial direction of the stirring cylinder to form a shoulder, a thrust bearing is fixedly arranged on the shoulder, a lower shaft ring of the thrust bearing is fixedly connected with the shoulder, and the upper surface of an upper shaft ring of the thrust bearing is fixedly connected with the support column.

4. The insulated concrete mixing apparatus of claim 2, wherein: one of the three crossbeams is provided with the shaft hole, and the axis of rotation of first planet agitator passes the shaft hole, is provided with rolling bearing between the axis of rotation of first planet agitator and the shaft hole, is provided with the layer board at the lower fixed surface who is provided with the crossbeam in shaft hole, the layer board is provided with the via hole that the axis of rotation that is used for first planet agitator passed, the aperture of via hole is less than the aperture in shaft hole.

5. The insulated concrete mixing apparatus of claim 1, wherein: and a discharge hole is formed in the bottom of the stirring cylinder.

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