CN210552132U - Two vertical scroll high performance concrete mixer - Google Patents

Abstract

The utility model discloses a double vertical shaft high performance concrete mixer, which comprises a mixing drum and two mixing mechanisms arranged in the mixing drum, wherein two shearing and material-lifting units fully mix materials through the mixing blades at the lower part, simultaneously, the lifting blades stir and lift the materials to the top, the materials are diffused to the periphery and fall under the action of gravity, the forced extrusion units forcibly extrude the falling materials, the two forced extrusion units rotate oppositely, the materials enter the tooth-shaped blades, the tooth-shaped blades are meshed to extrude the materials to be fine particles, the forced material lifting stirring effect and the shearing stirring effect are exerted in the height direction, so that powder cohesive masses in the high-performance concrete mixture are broken, the mixture is promoted to form good circular motion in the vertical height direction, and the stirring quality and the stirring efficiency of the high-performance concrete are greatly improved.

Description

Two vertical scroll high performance concrete mixer

Technical Field

The utility model belongs to the technical field of concrete mixer, a two vertical scroll high performance concrete mixers is related to.

Background

The concrete mixer is widely applied in the field of construction machinery, and has the function of mixing concrete raw materials such as cement, water, sand, stones, additives and the like which are prepared according to a certain proportion into a uniform mixture which meets the quality requirement. The high-performance concrete is used as the development direction of concrete technology, is prepared by adopting modern technology on the basis of greatly improving the performance of common concrete, and has the advantages of excellent mixture performance, mechanical property, durability, long-term performance and the like. Compared with common concrete, the high-performance concrete has the characteristics of low water-cement ratio and large use of mineral fine admixture and high-efficiency admixture, so that the high-performance concrete has more fine powder, the cohesiveness between the admixture is high, and the high-performance concrete is difficult to stir uniformly in a short time, and therefore, a stirring mechanism is required to provide more energy and stronger mechanical action in the stirring process to destroy powder aggregates and accelerate the uniform dispersion of material components.

At present, a double-horizontal-shaft mixer is the most commonly used type in concrete mixing machinery, but a sealing system at the end of a mixing shaft is always under the extrusion action of mixed materials during mixing, so that the double-horizontal-shaft mixer is easy to lose efficacy and affects the reliability of a transmission system, and the double-horizontal-shaft mixer becomes a weak link of the whole machine. Compared with the prior art, although the vertical shaft concrete mixer has no short plate with sealed shaft end, the prior machine type is mostly a single vertical shaft, and the forced stirring action in the height direction is lacked during the stirring, so that the diameter-height ratio of the mixer is large, the large-scale development of the mixer is limited, and a speed gradient exists in the mixing drum, so that the position of the mixing shaft becomes a low-efficiency region for mixing. The novel double-vertical-shaft stirrer can improve the mutual low-efficiency area of the stirring shaft to a certain extent through the rotating radius of the crossed stirring blades, so that the stirring quality and efficiency are better. However, the stirring problem of the height direction of the existing double-vertical-shaft stirrer is not completely solved, although some helical blades are adopted, the stirring effect on the mixture can be improved to a certain extent, the intensity of the material lifting and stirring effect is small, the action range is limited, and the gravity deposition problem of the mixture at the bottom of the stirring cylinder cannot be completely solved. Meanwhile, for high-performance concrete which is difficult to stir, all existing mixers lack mechanical forced extrusion effect of stirring blades on mixed materials, and agglomerated powder aggregates cannot be sufficiently crushed, so that the quality and the efficiency of the produced high-performance concrete are seriously influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a double vertical shaft high-performance concrete mixer, which improves the mixing quality and efficiency,

the utility model discloses a realize through following technical scheme:

a double-vertical-shaft high-performance concrete mixer comprises a forced extrusion transmission mechanism, a shearing and material lifting transmission mechanism, a mixing drum and two mixing mechanisms arranged in the mixing drum, wherein each mixing mechanism comprises a forced extrusion unit and a shearing and material lifting unit;

the forced extrusion unit comprises a flange plate, an extrusion stirring arm and a tooth-shaped blade; the top of the flange plate is connected with a forced extrusion transmission mechanism, a plurality of extrusion stirring arms are vertically arranged, the circumference of the extrusion stirring arms is uniformly distributed at the bottom of the flange plate, a plurality of tooth-shaped blades are arranged on each extrusion stirring arm at intervals up and down, teeth and tooth sockets are alternately arranged on the outer side walls of the tooth-shaped blades, and the width and the height of the tooth sockets are larger than the thickness and the height of the teeth; the two forced extrusion units rotate oppositely, and the tooth-shaped blades of the two forced extrusion units can be meshed with each other;

the shearing and material-lifting unit comprises a stirring shaft, and a stirring blade and a lifting blade which are arranged on the stirring shaft, wherein the upper end of the stirring shaft passes through the flange plate to be connected with the shearing and material-lifting transmission mechanism, the stirring blade is arranged at the lower end of the stirring shaft, and the lifting blade is positioned at the upper part of the stirring blade;

the stirring vanes are a plurality of vanes which are uniformly distributed on the side wall of the stirring shaft in a plurality of circumferences, the lifting vanes comprise a plurality of vanes, and the vanes are spirally arranged on the stirring shaft from bottom to top.

Preferably, the mixing drum comprises two cylinders which are horizontally crossed and communicated with each other, the horizontal section of the mixing drum is of a gourd shape, a hemisphere is arranged at the bottom of each cylinder, and the two hemispheres are connected and communicated with each other.

Preferably, the two hemispheroids are respectively provided with a swinging material lifting unit which comprises a swinging material lifting shaft and a plurality of arc-shaped blades, the swinging material lifting shaft is horizontally arranged, one end of the swinging material lifting shaft penetrates through the mixing drum to be connected with the swinging material lifting transmission mechanism, the same ends of the plurality of arc-shaped blades are respectively connected with the end parts of the swinging material lifting shaft, the other ends of the plurality of arc-shaped blades extend towards the centers of the two hemispheroids, and the three arc-shaped blades are arranged at intervals according to angles; the ends, close to each other, of the arc-shaped blades of the two swing material lifting units are fixedly connected, so that the two arc-shaped blades form a W-shaped blade.

Preferably, the stirring blade at the lower end of the stirring shaft extends into the hemisphere and is positioned at the top of the swinging material lifting unit, a gap is formed between the stirring blade and the arc-shaped blade, a gap is formed between the arc-shaped blade and the inner wall of the hemisphere, and the gap is larger than the maximum particle size of the aggregate;

the stirring blade is arranged at the lower end of the stirring shaft, and the lifting blade is positioned at the upper part of the stirring blade.

Preferably, the swing material lifting transmission mechanism comprises a swing transmission housing, and a swing pinion, a swing bull gear, a connecting rod and a crank are arranged in the swing transmission housing;

the swing small gear is connected with an output shaft of the motor and meshed with the swing large gear, one side of the swing large gear is eccentrically hinged with one end of a connecting rod, the other end of the connecting rod is hinged with one end of a crank, and the other end of the crank is fixedly connected with the swing material lifting shaft.

Preferably, the blades are arranged in an inclined mode, and the inclination angle is 30-45 degrees.

Preferably, the top of the lifting blade is also provided with a reverse blade for preventing the mixture from being thrown up, the reverse blade comprises a plurality of blades which are uniformly distributed on the stirring shaft along the circumference, and the inclination angle of the reverse blade is opposite to the inclination angle direction of the lifting blade.

Preferably, the top of the mixing drum is provided with a transmission housing, the transmission housing is provided with an upper cavity and a lower cavity, the forced extrusion transmission mechanism is arranged in the lower cavity, and the bottom of the transmission housing is connected with the mixing drum through a supporting piece;

the forced extrusion transmission mechanism comprises a left-handed worm wheel, a right-handed worm wheel, a double-headed worm and an extrusion output shaft; the bottom parts of the left-hand worm wheel and the right-hand worm wheel are respectively provided with a hollow extrusion output shaft, the supporting piece is provided with two step holes, the extrusion output shafts are arranged in the step holes, the left-hand worm wheel and the right-hand worm wheel are respectively positioned at the top part of the supporting piece, and the lower end of the extrusion output shaft penetrates through the step holes to be connected with the flange plate;

the double-headed worm is horizontally arranged in the base housing, one end of the double-headed worm penetrates through the base housing to be connected with the motor, two tooth profiles with opposite rotation directions are respectively arranged on the double-headed worm, and the two tooth profiles are respectively meshed with the left-handed worm wheel and the right-handed worm wheel.

Preferably, the shearing and lifting transmission mechanism is arranged in an upper cavity of the transmission housing and comprises two input gears and two shearing and lifting output shafts; the lower end of the shearing and lifting output shaft penetrates through the extrusion output shaft to be fixedly connected with the stirring shaft, the input gear is sleeved on the shearing and lifting output shaft, the two input gears are mutually meshed, and the upper end of one shearing and lifting output shaft is connected with the motor.

Preferably, two transition gears which are meshed with each other are further arranged between the two input gears, and the two input gears are respectively meshed with one transition gear.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model provides a double vertical shaft high performance concrete mixer, which comprises a mixing drum and two mixing mechanisms arranged in the mixing drum, wherein the two shearing and material-extracting units fully mix the materials through the mixing blades at the lower part, simultaneously, the lifting blades stir and lift the materials to the top, the materials are diffused to the periphery and fall under the action of gravity, the forced extrusion units forcibly extrude the falling materials, the two forced extrusion units rotate oppositely, the materials enter the tooth-shaped blades, the tooth-shaped blades are meshed to extrude the materials to be fine particles, the forced material lifting stirring effect and the shearing stirring effect are exerted in the height direction, so that powder cohesive masses in the high-performance concrete mixture are broken, the mixture is promoted to form good circular motion in the vertical height direction, and the stirring quality and the stirring efficiency of the high-performance concrete are greatly improved.

Furthermore, the bottom of the mixing drum is provided with the hemispheroid, so that the volume of the mixing drum is increased, the radial height ratio of the mixer can be effectively reduced, the mixer is easy to enlarge, and the risk of material segregation caused by overlarge linear speed in the mixing process is reduced.

Furthermore, the swing material lifting unit is arranged in the hemisphere, the material at the bottom of the stirring cylinder can be repeatedly and upwards turned, the material lifting stirring action range is large, the material lifting stirring action is strong, the gravity deposition problem of the mixture at the bottom of the stirring cylinder is effectively solved, and the stirring quality and efficiency are improved.

Further, a layer of reverse blades is arranged at the topmost part of the spiral blades and used for avoiding the mixture from being thrown up.

Furthermore, the swinging material lifting transmission mechanism adopts a crank and swing rod structure, the structure is simple, the operation is stable, the reciprocating swinging of the swinging material lifting unit is realized, and the quality cost is reduced.

Furthermore, the forced extrusion transmission mechanism drives the two forced extrusion units to rotate oppositely, and the shearing material lifting transmission mechanism drives the two shearing material lifting transmission mechanisms to rotate oppositely, so that a transmission system of the whole stirring machine is simplified, the manufacturing cost is reduced, and meanwhile, the two transmission structures are arranged in the same transmission housing, so that the occupied area of equipment is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the blender of the present invention;

FIG. 2 is a schematic structural view of the stirring mechanism of the present invention;

FIG. 3 is a schematic view of the transmission of the forced extrusion unit of the present invention;

FIG. 4 is a schematic view of the transmission of the shearing and lifting unit of the present invention;

FIG. 5 is a schematic view of the forced extrusion unit of the present invention;

FIG. 6 is a schematic view of the forced extrusion of the present invention;

FIG. 7 is a schematic view of the transmission of the swing lifting unit of the present invention;

FIG. 8 is a schematic structural view of the swing material lifting unit of the utility model;

FIG. 9 is a schematic view of the structure of the shearing and lifting unit of the present invention;

FIG. 10 is a schematic view of the structure of the mixing drum of the present invention;

FIG. 11 is a schematic sectional view of a mixing drum according to the present invention;

FIG. 12 is a schematic view of a chassis configuration;

fig. 13 is a schematic view of the supporting member of the present invention.

Description of reference numerals: 1 a driving device; 2, a transmission device; 2-1-1 input gear; 2-1-3 transition gears; 2-1-4 bearing seats; 2-1-5 shearing and material-extracting output shaft; 2-2-1 double-screw worm; 2-2-2 extruding the output shaft; 2-2-3 left-hand worm gear; 2-2-4 bearings; 2-2-5 right-handed worm gear; 2-3-1 oscillating pinion; 2-3-2 swinging the bull gear; 2-3-3 connecting rods; 2-3-4 cranks; 2-3-5 swing transmission housing; 2-4-1 middle layer cover shell; 2-4-2 upper layer encloser; 2-4-3 base housing; 3 a support member; 4, a stirring device; 4-1 extrusion unit; 4-1-1 flange plate; 4-1-2 extruding the stirring arm; 4-1-3 stiffeners; 4-1-4 tooth-shaped blades; 4-2, shearing and extracting a material unit; 4-2-1 shearing and material-extracting stirring shaft; 4-2-2 rectangular blades; 4-2-3 triangular blades; 4-3 swinging the material lifting unit; 4-3-1 swinging the material lifting shaft; 4-3-2W-shaped blades; 5, a mixing drum; 5-1 feeding port; 5-2 hydraulic cylinders; 5-3 of a discharge opening; 6, a chassis; 7 a coupler.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, which are provided for purposes of illustration and not limitation.

Referring to fig. 1 to 13, the double vertical shaft high performance concrete mixer comprises a driving device 1, a transmission device 2, a support member 3, a mixing device 4, a mixing drum 5 and a base frame 6.

Referring to fig. 10 and 11, the agitating drum 5 is formed by connecting an upper end portion and a lower end portion. The upper end part comprises two perpendicular drums that set up, and two drums level are crossing and intercommunication each other, and the horizontal cross-section of two drums is "8" style of calligraphy thin waist type, and two cylinder section of thick bamboo geometric dimension are the same, and cylinder section of thick bamboo diameter is about 1 with the height ratio: 1, the center distance of the two cylinders is smaller than the diameter of the cylinders, and the ratio of the center distance of the two cylinders to the diameter of the cylinders is preferably 0.60-0.70 for enhancing the extrusion effect.

The lower end part of the mixing drum 5 consists of two hemispheres, the upper ends of the two hemispheres are respectively connected with the lower ends of the two drums, the two hemispheres are communicated with each other, and the diameter of each hemisphere is equal to that of each drum; the connection part of the hemisphere and the cylinder is connected with a fixed plate, and the mixing drum 5 is connected and fixed with the chassis 6 through the fixed plate;

the upper end of the mixing drum 5 is provided with a feed inlet 5-1, a discharge opening 5-3 is arranged at the lower hemispherical body of the mixing drum 5, the discharge opening 5-3 is provided with a discharge door, and the opening and the closing of the discharge door are driven by a hydraulic cylinder 5-2.

Referring to fig. 2, the stirring device 4 is arranged in the stirring cylinder 5, the stirring device 4 comprises two stirring mechanisms, and each stirring mechanism comprises a forced extrusion unit 4-1, a shearing and lifting unit 4-2 and a swinging and lifting unit 4-3; the forced extrusion unit 4-1 and the shearing and lifting unit 4-2 are vertically arranged and coaxial, the swinging and lifting unit 4-3 is positioned in a hemisphere at the lower end of the mixing drum, the swinging shaft of the swinging and lifting unit 4-3 is superposed with the connecting line of the sphere centers of the two hemispheroids, and the axial lines of the forced extrusion unit 4-1 and the shearing and lifting unit 4-2 are vertical to the swinging shaft.

The swing material lifting unit 4-3 is assembled in a hemisphere of the mixing drum 5 and can swing back and forth in the hemisphere, the axis of the back and forth swing is perpendicular to the axis of the cylinder and coincides with the horizontal central line of the hemisphere, the forced extrusion unit 4-1 is arranged at the top of the swing material lifting unit 4-3, the shearing material lifting unit 4-2 is arranged between the swing material lifting unit 4-3 and the forced extrusion unit 4-1, and the shearing material lifting unit 4-2 and the forced extrusion unit 4-1 respectively do circular motion to mix concrete.

Referring to fig. 5, the forced extrusion unit 4-1 includes a flange 4-1-1, an extrusion stirring arm 4-1-2, a toothed blade 4-1-4, and a reinforcing rod 4-1-3.

The extruding and stirring arms 4-1-2 are circumferentially and uniformly distributed on the outer side of the flange plate 4-1-1, the upper ends of the extruding and stirring arms 4-1-2 are connected with the side wall of the flange plate 4-1-1 through connecting pieces, the extruding and stirring arms 4-1-2 are sleeved with two tooth-shaped blades 4-1-4 at intervals from top to bottom and fixedly connected with the extruding and stirring arms 4-1-1, the lower tooth-shaped blades 4-1-4 are arranged at the lower ends of the extruding and stirring arms, teeth and tooth sockets are alternately arranged on the outer side wall of the tooth-shaped blades 4-1-4, and the width and the height of the tooth sockets are both greater than the thickness and the height of; the reinforcing rod 4-1-3 connects the plurality of extruding stirring arms 4-1-2 in the horizontal direction to reinforce the rigidity of the extruding stirring arms 4-1-2, and the reinforcing rod 4-1-3 is positioned at the top of the upper layer of the toothed blade.

Referring to fig. 6, the flange 4-1-1 is connected to a driving device described below, and the two forced extrusion units 4-1 rotate relatively at a constant speed of 30-60 r/min. The toothed blades 4-1-4 of the two forced extrusion units 4-1 can be meshed with each other during rotation, the toothed blades of the two forced extrusion units are required to be arranged at an angle a of one tooth, and because the tooth thickness and the tooth height are smaller than the tooth width and the tooth depth of the tooth socket, gaps exist between the teeth and the tooth socket during meshing, and the teeth and the tooth socket can forcibly extrude materials in the gaps.

Preferably, the number of the extrusion stirring arms 4-1-2 is 3, and the extrusion stirring arms are distributed at equal intervals of 120 degrees.

Referring to fig. 9, the shear lifting unit 4-2 includes a stirring shaft 4-2-1, rectangular blades 4-2-2, and triangular blades 4-2-3. Through holes are uniformly distributed on the rectangular blade 4-2-2 and the triangular blade 4-2-3, so that the stirring resistance can be reduced during shearing and lifting.

The stirring shaft 4-2-1 is vertically arranged, the lower end of the stirring shaft extends into the hemisphere at the lower part of the stirring cylinder, three layers of blades are arranged on the stirring shaft positioned in the hemisphere, three blades are uniformly distributed on the circumference of each layer, the three blades at the lowest end of the stirring shaft 4-2-1 are triangular blades 4-2-3, the triangular blades 4-2-3 are obliquely arranged, the inclination angle is 30-45 degrees, the bottom edge of each triangular blade 4-2-3 is arc-shaped, the arc shape is concentric with the hemisphere, and the shortest distance between the arc-shaped edge and the top of the swinging material lifting unit 4-3 is not less than 2 times of the maximum particle. The other two layers of blades are rectangular blades 4-2-2, the length of each blade gradually increases from the bottom to the top, and the distance between the edge of each blade and the top of the swinging material lifting unit 4-3 is not less than 2 times of the maximum particle size of the aggregate.

The stirring shaft in the cylinder is provided with a plurality of rectangular blades 4-2-2, the rectangular blades 4-2-2 are spirally arranged on the stirring shaft 4-2-1 from bottom to top so as to realize the upward lifting function in the vertical direction, the rectangular blades 4-2-2 are obliquely arranged, the inclination angle is 30-45 degrees, and the shortest distance between the edges of the rectangular blades 4-2-2 and the stirring arm of the forced extrusion unit 4-1 is not less than 2 times of the maximum particle size of the aggregate.

The top of the spiral blade is also provided with a layer of reverse blades for preventing the mixture from being thrown, and the inclination direction of the spiral blade at the top layer is opposite to that of the blade at the lower part.

The upper end of the stirring shaft 4-2-1 penetrates through the flange plate to be connected with a shearing and material-lifting transmission output shaft 2-1-5 in the transmission device 2. The two shearing and lifting units 4-2 rotate oppositely at a constant speed, the rotating directions are respectively the same as those of the concentric forced extrusion units, and the rotating speed range is 100-300 r/min.

Referring to fig. 8, the swing material lifting unit 4-3 comprises a swing material lifting shaft 4-3-1 and three arc-shaped blades, a horizontal fixing hole is formed in the lower end of the side wall of the cylinder, the swing material lifting shaft 4-3-1 is horizontally installed in the fixing hole, the three arc-shaped blades are evenly distributed on the outer wall of one end, located in the cylinder, of the swing material lifting shaft 4-3-1 in the circumference, one end of each arc-shaped blade is connected with the fixing shaft, the other end of each arc-shaped blade extends towards the centers of the two cylinders, the arc radians of the arcs are matched with the hemispheres, and the three arc-shaped.

The two swing material lifting units 4-3 are symmetrically arranged, and the ends, close to each other, of the arc-shaped blades of the two swing material lifting units 4-3 are fixedly connected, so that the two arc-shaped blades form a W-shaped blade 4-3-2. When the W-shaped blade 4-3-2 works, the swing angle range is 45-55 degrees of bilateral symmetry. The swing speed of the swing material lifting unit ranges from 4 to 3 and is 300 to 500 rad/min.

Referring again to fig. 1, the support 3 is mounted on the upper end of the mixing drum 5, and the transmission is mounted on the upper end of the support 3. The transmission device 2 comprises a swing material lifting transmission mechanism, a forced extrusion transmission mechanism and a shearing material lifting transmission mechanism.

Referring to fig. 7, the swing material lifting transmission mechanism adopts a crank rocker mechanism principle, is arranged on the side wall of the mixing drum 5, is fixed on the frame, and comprises a motor and a swing transmission housing 2-3-5, wherein a swing pinion 2-3-1, a swing gearwheel 2-3-2, a connecting rod 2-3-3 and a crank 2-3-4 are arranged.

The motor and the swing transmission housing 2-3-5 are respectively fixed on the underframe 6 through a bracket, the output shaft of the motor extends into the swing transmission housing 2-3-5 and is fixedly connected with the swing pinion 2-3-1, the swing pinion 2-3-1 is meshed with the swing gearwheel 2-3-2, the swing gearwheel 2-3-2 is meshed and is fixed in the shell through a rotating shaft, one side of the swing gearwheel 2-3-2 is eccentrically hinged with one end of the connecting rod 2-3-3, namely the hinged end is not concentric with the swing gearwheel 2-3-2, the other end of the connecting rod 2-3-3 is hinged with one end of the crank 2-3-4, the other end of the crank 2-3-4 is fixedly connected with the swing material lifting shaft 4-3-1 which passes through the cylinder through a key, driving the shearing and lifting unit 4-2 to swing.

The forced extrusion transmission mechanism and the shearing and material lifting transmission mechanism are both arranged at the top of the mixing drum 5, a transmission housing is arranged at the top of the mixing drum 5 and comprises an upper housing 2-4-2, a middle housing 2-4-1 and a base housing 2-4-3, the bottom of the base housing 2-4-3 is connected with the supporting piece, the top of the base housing 2-4-3 is connected with the bottom of the middle housing 2-4-1, and the top of the middle housing 2-4-1 is connected with the upper housing 2-4-2.

Referring to fig. 4, the shearing and lifting transmission mechanism adopts gear transmission and is arranged in the middle layer housing 2-4-1, and comprises two shearing and lifting transmission units, two transition gears 2-1-3, a coupler 7 and a motor. The shearing and lifting transmission unit comprises an input gear 2-1-1 and a shearing and lifting output shaft 2-1-5. The two shearing and material-lifting transmission units are respectively connected with the two shearing and material-lifting stirring shafts 4-2-1.

The shearing and lifting output shaft 2-1-5 is vertically arranged, the upper end of the shearing and lifting output shaft penetrates through the upper layer housing 2-4-2 and is connected with the motor through the coupling 7, the input end of the shearing and lifting output shaft penetrates through the bottom of the middle layer housing 2-4-1 and is connected with the top of the shearing and lifting stirring shaft 4-2-1, connecting discs are arranged at the bottom of the input end and the top of the shearing and lifting stirring shaft 4-2-1, and the two connecting discs are connected through bolts.

An input gear 2-1-1 is fixedly sleeved on a shearing and lifting output shaft 2-1-5 and is positioned in a middle-layer housing 2-4-1, two transition gears 2-1-3 are meshed with each other and are positioned between the two input gears 2-1-1, the two transition gears are respectively meshed with the two input gears, and a shearing and lifting stirring shaft connected with a motor transmits power to the other shearing and lifting output shaft 2-1-5 through the transition gears.

Referring to fig. 3, the forced extrusion transmission mechanism is installed at the bottom of the middle housing through a support member 3 and is located in the base housing 2-4-3, and comprises a left-hand worm wheel 2-2-3, a right-hand worm wheel 2-2-5, a double-head worm 2-2-1, an extrusion output shaft 2-2-2, a coupler 7 and a motor.

Referring to fig. 13, the supporting member includes two horizontally connected fixing rings, the fixing rings are provided with adjusting holes, supporting legs are provided on both sides of the fixing rings, the supporting legs are connected with the top of the mixing drum 5, and the fixing rings are connected with the bottom surface of the middle layer housing through bolts.

The bottoms of the left-hand worm wheel 2-2-3 and the right-hand worm wheel 2-2-5 are concentrically provided with a hollow extrusion output shaft 2-2-2, the left-hand worm wheel 2-2-3 and the right-hand worm wheel 2-2-5 are respectively sleeved on the two shearing and lifting output shafts 2-1-5 through the extrusion output shafts, the two extrusion output shafts are respectively positioned in two fixed rings of the supporting piece, and a thrust bearing is arranged on a shaft shoulder of each fixed ring and used for axially positioning the extrusion output shafts. The lower end of the extrusion output shaft 2-1-5 is provided with a fixed disc which is connected with a flange plate 4-1-1 of the forced extrusion unit 4-1, so that the forced extrusion unit 4-1 can be driven to rotate when the left-hand worm wheel 2-2-3 and the right-hand worm wheel 2-2-5 rotate.

The double-headed worm 2-2-1 is horizontally arranged in the base housing 2-4-3, one end of the double-headed worm 2-2-1 penetrates through the side wall of the base housing 2-4-3 and is connected with the motor through the coupler 7, and the motor is fixed on a motor base of the underframe through a connecting piece. Two ends of the double-headed worm 2-2-1 are respectively provided with tooth profiles with opposite rotation directions for being respectively meshed with the left-hand worm wheel 2-2-3 and the right-hand worm wheel 2-2-5. The extrusion output shaft 2-2-2 is of a hollow structure and is welded with the gear into a whole, two through holes are symmetrically arranged on the transmission housing base 2-4-3, the centers of the through holes are superposed with the axes of the two cylinders of the mixing drum 5, and the extrusion output shaft 2-2-2 extends into the mixing drum 5 through the through holes.

The following will explain the implementation process of the dual vertical shaft high performance concrete mixer of the present invention in detail with reference to the above embodiments.

Concrete raw materials are fed from a feeding port 5-1 above a mixing drum 5, two forced extrusion units 4-1 rotate relatively, two shearing and material lifting units 4-2 rotate relatively and simultaneously mix the concrete raw materials, a swinging material lifting unit 4-3 at the bottom of the mixing drum 5 swings repeatedly at a set swinging speed to continuously turn up the mixture at the bottom of the mixing drum 5; the two shearing and material lifting units 4-2 rotate oppositely at the same set rotating speed, generate strong shearing action on the materials turned up at the bottom of the mixing drum 5 and generate spiral material lifting action on the materials, and continuously lift the materials to the highest position of the upper part of the mixing drum 5; the material falls due to gravity at the highest position, the two forced extrusion units 4-1 rotate relatively to generate strong repeated extrusion action on the material, the powder agglomerates in the material are crushed, and finally the material falls to the bottom of the mixing drum 5 under the action of gravity. The materials are repeatedly circulated in the mixing drum until the materials are uniformly mixed, the hydraulic cylinder 5-2 is started, the hydraulic cylinder 5-2 drives the discharging door to move along the track through the connecting rod, and the discharging opening 5-3 at the bottom of the mixing drum 5 is opened for discharging.

The utility model provides a pair of two vertical scroll high performance concrete mixer, can provide powerful mechanical extrusion effect when stirring high performance concrete, and exert mandatory lifting material stirring effect and shearing stirring effect at the direction of height, help smashing the powder bonding group in the high performance concrete mixture, make the mixture form good cyclic motion on the vertically direction of height, simultaneously under the condition of guaranteeing the mixer capacity, can reduce the diameter size of stirring barrel, make the mixer easily enlarge and reduce the material segregation risk that the stirring in-process caused because the linear velocity is too big.

The utility model discloses a material unit is carried in the swing and the material unit is carried in the shearing mutually supports, has realized that the ascending relay of direction of height carries the material in the churn, has strengthened the stirring effect of material on the direction of height in the churn, and to the characteristics that high performance concrete viscosity is big simultaneously, the blade of carrying the material unit is carried in the shearing has the thru hole, and resistance when can reducing the stirring improves stirring efficiency.

The utility model provides a profile of tooth blade with force extrusion to viscosity big, be difficult to the high performance concrete of stirring, can provide strong mechanical force extrusion for the powder group of gathering is abundant broken, thereby very big improvement the stirring quality and the stirring efficiency of high performance concrete.

The utility model provides a material mechanism is carried in new swing can upwards turn repeatedly for the material of churn bottom, carries the material stirring effect scope big, carries the material stirring effect reinforce, has effectively solved the gravity deposition problem of mixture in the churn bottom, has improved stirring quality and efficiency.

The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.

Claims (10)

1. A double-vertical-shaft high-performance concrete mixer is characterized by comprising a forced extrusion transmission mechanism, a shearing and lifting transmission mechanism, a mixing drum (5) and two mixing mechanisms arranged in the mixing drum (5), wherein each mixing mechanism comprises a forced extrusion unit (4-1) and a shearing and lifting unit (4-2);

the forced extrusion unit (4-1) comprises a flange plate (4-1-1), an extrusion stirring arm (4-1-2) and a tooth-shaped blade (4-1-4); the top of the flange plate (4-1-1) is connected with a forced extrusion transmission mechanism, a plurality of extrusion stirring arms (4-1-2) are vertically arranged, the circumference of the extrusion stirring arms is uniformly distributed at the bottom of the flange plate (4-1-1), each extrusion stirring arm (4-1-2) is provided with a plurality of tooth-shaped blades (4-1-4) at intervals up and down, the outer side wall of each tooth-shaped blade (4-1-4) is alternately provided with teeth and tooth sockets, and the width and the height of each tooth socket are both greater than the thickness and the height of each tooth; the two forced extrusion units (4-1) rotate oppositely, and the toothed blades (4-1-4) of the two forced extrusion units (4-1) can be meshed with each other;

the shearing and material extracting unit (4-2) comprises a stirring shaft (4-2-1), and a stirring blade and a lifting blade which are arranged on the stirring shaft, wherein the upper end of the stirring shaft (4-2-1) is connected with the shearing and material extracting transmission mechanism through a flange plate (4-1-1), the stirring blade is arranged at the lower end of the stirring shaft (4-2-1), and the lifting blade is positioned at the upper part of the stirring blade;

the stirring blades are a plurality of blades with the circumference uniformly distributed on the side wall of the stirring shaft, the lifting blades comprise a plurality of blades, and the blades are spirally arranged on the stirring shaft (4-2-1) from bottom to top.

2. A double vertical shaft high performance concrete mixer according to claim 1, wherein the mixing drum (5) comprises two horizontally intersecting cylinders which are interconnected, the horizontal cross section of the mixing drum (5) is gourd-shaped, the bottom of each cylinder is provided with a hemisphere, and the two hemispheres are connected and interconnected.

3. The double-vertical-shaft high-performance concrete mixer as claimed in claim 2, wherein a swing material lifting unit (4-3) is arranged in each of the two hemispheres and comprises a swing material lifting shaft (4-3-1) and a plurality of arc-shaped blades, the swing material lifting shaft (4-3-1) is horizontally arranged, one end of the swing material lifting shaft passes through the mixing drum (5) and is connected with the swing material lifting transmission mechanism, the same ends of the plurality of arc-shaped blades are respectively connected with the end parts of the swing material lifting shaft (4-3-1), the other ends of the plurality of arc-shaped blades extend towards the centers of the two hemispheres, and the three arc-shaped blades are arranged at intervals according to angles; the ends, close to each other, of the arc-shaped blades of the two swing material lifting units (4-3) are fixedly connected, so that the two arc-shaped blades form a W-shaped blade (4-3-2).

4. The dual-vertical-shaft high-performance concrete mixer according to claim 3, wherein the mixing blades at the lower end of the mixing shaft (4-2-1) extend into the hemisphere and are positioned at the top of the swinging material-lifting unit (4-3), a gap is formed between the mixing blades and the arc-shaped blades, a gap is formed between the arc-shaped blades and the inner wall of the hemisphere, and the gap is more than (2) times of the maximum particle size of the aggregate;

the stirring blade is arranged at the lower end of the stirring shaft (4-2-1), and the lifting blade is positioned at the upper part of the stirring blade.

5. A double vertical shaft high performance concrete mixer according to claim 3, wherein the swing material lifting transmission mechanism comprises a swing transmission housing (2-3-5) in which a swing small gear (2-3-1), a swing big gear (2-3-2), a connecting rod (2-3-3) and a crank (2-3-4) are arranged;

the swing small gear (2-3-1) is connected with an output shaft of a motor, the swing small gear (2-3-1) is meshed with the swing large gear (2-3-2), one side of the swing large gear (2-3-2) is eccentrically hinged with one end of a connecting rod (2-3-3), the other end of the connecting rod (2-3-3) is hinged with one end of a crank (2-3-4), and the other end of the crank (2-3-4) is fixedly connected with a swing lifting shaft (4-3-1).

6. The dual vertical shaft high performance concrete mixer of claim 1 wherein said lifting blades are inclined at an angle of between 30 ° and 45 °.

7. A double vertical shaft high performance concrete mixer according to claim 6, wherein the top of the lifting blades is also provided with a counter blade for preventing the mixture from being thrown up, the counter blade comprises a plurality of blades which are circumferentially and uniformly distributed on the stirring shaft (4-2-1), and the inclination angle of the counter blade is opposite to that of the lifting blades.

8. The double-vertical-shaft high-performance concrete mixer according to claim 1, wherein a transmission housing is arranged at the top of the mixing drum, an upper cavity and a lower cavity are arranged in the transmission housing, a forced extrusion transmission mechanism is arranged in the lower cavity, and the bottom of the transmission housing is connected with the mixing drum (5) through a support member (3);

the forced extrusion transmission mechanism comprises a left-hand worm wheel (2-2-3), a right-hand worm wheel (2-2-5), a double-head worm (2-2-1) and an extrusion output shaft (2-2-2); the bottoms of the left-hand worm wheel (2-2-3) and the right-hand worm wheel (2-2-5) are respectively provided with a hollow extrusion output shaft (2-2-2), the supporting piece (3) is provided with two step holes, the extrusion output shaft (2-2-2) is arranged in the step holes, the left-hand worm wheel (2-2-3) and the right-hand worm wheel (2-2-5) are respectively positioned at the top of the supporting piece (3), and the lower end of the extrusion output shaft penetrates through the step holes to be connected with the flange plate (4-1-1);

the double-headed worm (2-2-1) is horizontally arranged in the base housing (2-4-3), one end of the double-headed worm (2-2-1) penetrates through the base housing (2-4-3) to be connected with the motor, two tooth profiles with opposite rotation directions are respectively arranged on the double-headed worm (2-2-1), and the two tooth profiles are respectively meshed with the left-hand worm wheel (2-2-3) and the right-hand worm wheel (2-2-5).

9. A dual vertical shaft high performance concrete mixer according to claim 8 wherein the shear lifting drive is located in the upper cavity of the drive housing and includes two input gears (2-1-1) and two shear lifting output shafts (2-1-5); the lower end of the shearing and lifting output shaft (2-1-5) penetrates through the extrusion output shaft (2-2-2) to be fixedly connected with the stirring shaft (4-2-1), the input gear (2-1-1) is sleeved on the shearing and lifting output shaft (2-1-5), the two input gears (2-1-1) are meshed with each other, and the upper end of one shearing and lifting output shaft (2-1-5) is connected with the motor.

10. A dual vertical shaft high performance concrete mixer according to claim 9, wherein two transition gears are provided between the two input gears (2-1-1) and are in mesh with each other, and wherein the two input gears (2-1-1) are in mesh with one transition gear respectively.

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