AU2021102861A4

AU2021102861A4 - Special feeding device for cement and soil mixing

Info

Publication number: AU2021102861A4
Application number: AU2021102861A
Authority: AU
Inventors: Yubo CHEN; Yanbin CUI; Jun Dong; Xuelei Li; Chenghong LIU; Liang Ma; Fuliang Shen; Chao Zhang; Ningjun Zhang
Original assignee: China Railway Third Group No 2 Engineering Co Ltd; China Railway Third Bureau Group Co Ltd
Current assignee: China Railway Third Group No 2 Engineering Co Ltd; China Railway Third Bureau Group Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2021-08-19
Anticipated expiration: 2029-05-26

Abstract

The utility model discloses a special feeding device for cement and soil mixing belonging to construction equipment technical field, including several bins arranged on the rack side by side, the inlet of the bin is provided with a screening mechanism for loose soil material, the bottom of the bin is provided with a mixing mechanism for secondary loose soil material in the bin; a metering and conveying mechanism is arranged below the outlet of the bin for measuring and conveying soil materials. The utility model loosens the soil material in advance through the screening mechanism arranged at the inlet of the bin, so as to avoid blockage and accumulation at the feed port. The loosened soil material at the bottom of the lower bin is loosened twice through the stirring mechanism, to avoid soil material in the bin under the influence of arch feeding; the soil material falling from the outlet of the bin falls to the metering and conveying mechanism for metering and conveying to the mixing station for mixing. The utility model can make the soil material fall smoothly, effectively improve the batching speed, and ensure the accuracy of soil material measurement. 1 DRAWINGS 135 14 177 Fig.1 155 1 9 11

Description

DRAWINGS

135

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177

Fig.1

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SPECIFICATION SPECIAL FEEDING DEVICE FOR CEMENT AND SOIL MIXING TECHNICAL FIELD

The utility model belongs to the technical field of construction equipment, in

particular to a special feeding device for cement and soil mixing.

BACKGROUND OF INVENTION

The construction quality of high-speed railway subgrade directly affects the operation

safety of high-speed railway. The design standard of high-speed railway foundation is

high, the construction is difficult and the construction quality is especially high.

1, The upper screen mesh of the hopper is easy to block and piled up; 2. After the soil

enters the hopper, because the hopper structure form is inverted vertebral body, the

upper opening is big, the lower opening is small, when a large amount of rapid soil

material passes through, it will produce congested and joined-block in the middle and

lower part, forming arched soil layer and unable to feed or intermittent feeding,

affecting the subsequent soil material through, thus affecting the batching capacity. 3,

intermittent feeding, or a large group of falling impact feeding will cause soil material

measurement is not accurate; 4, the actual efficiency is very low. CONTENT OF UTILITY MODEL The utility model aims to solve the technical problems of shortcomings of the existing

technology mentioned above, and provides a special feeding device for lime and soil

mixing, which can make the soil fall smoothly, effectively improve the mixing speed,

and ensure the accuracy of soil measurement.

In order to solve the above technical problems, the technical scheme adopted by the

utility model is as follows:

The utility model relates to a special feeding device for cement and soil mixing which

comprises a plurality of bins arranged on the rack side by side, the inlet of the bin is

provided with a screening mechanism for loose soil material, the bottom of the bin is

provided with a mixing mechanism for secondary loose soil material in the bin; a

metering and conveying mechanism is arranged below the outlet of the bin for

measuring and conveying soil materials.

SPECIFICATION

Preferably, the screening mechanism comprises a vibrator and a screen mesh, wherein

the vibrator is connected with the screen mesh; and the screen mesh is horizontally

arranged at the upper opening end of the bin through a spring support.

Preferably, the spring support comprises a support seat, a guide sleeve, a spring and a

guide pillar, the longitudinal section of the support seat is "7" shape, the two ends of

the support seat is fixed on the inner wall of the bin, the upper surface of the support

seat is arranged horizontally; the guide sleeve is arranged on the upper surface of the

support seat, the guide pillar is arranged on the lower surface of the screen mesh, the

guide pillar and the inner hole of the guide sleeve sliding match; The upper end of the

spring is fixedly connected with the screen, and the lower end of the spring isfixedly

connected with the support seat.

Preferably, the stirring mechanism comprises two reverse rotating stirring shafts

driven by a stirring motor, and the two stirring shafts are arranged in parallel intervals

at the bottom of the lower bin; the outer circle of the stirring shaft is provided with a

plurality of stirring arms radially along the length direction, and the stirring arms on

the two stirring shafts are staggered; and the stirring motor and the two stirring shafts

are arranged on the frame.

Preferably, the mixing arm is L-shaped, the long side of the mixing arm is with a

radian, and the short side of the mixing arm is a broken arch blade. The broken arch

blade of the stirring arm on the same stirring shaft is in the same direction, and the

opposite direction of the broken arch blade of the stirring arm on the other stirring

shaft is arranged.

Preferably, the long side of the mixing arm is arranged on the fixed sleeve, the fixed

sleeve is a split structure, the fixed sleeve comprises a first hoop and the second hoop,

the first hoop and the second hoop one end isfixedly connected, the other end is

flexibly connected, for the first hoop and the second hoop is fixed on the outer circle

of the stirring shaft; the stirring arm is fixedly arranged on the outer surface of the

first hoop or the second hoop, and the circular groove of the first hoop and the second

hoop is matched with the stirring shaft. Further, two stirring shafts run through the

SPECIFICATION

lower part of bins, the stirring motor is arranged at one end of the stirring shaft, the

other end of the stirring shaft is arranged on the bearing seat; the stirring motor is one

or two, and the stirring motor drives two stirring shafts to rotate through a

transmission component.

Preferably, the described bin is a hollow cavity with a large upper opening and a small

lower opening, the cross section of the bin is rectangular, and the inclination angle a

of the two long sides of the bin is 63 and 64°.

Preferably, the metering conveying mechanism comprises a plurality of belt scales

and conveyor belts, a plurality of belt scales corresponding to the lower part of the bin

outlet, the transmission belt is arranged under a plurality of belt scales, used for

conveying soil material to a side of the mixing station.

Preferably, the belt scale comprises a conveying motor, a reducer, a driving drum, a

driven drum and a conveyor belt, the output shaft of the conveying motor and the

input shaft of the reducer are coaxial fixed, the output shaft of the reducer is coaxially

fixed with the rotating shaft of the active drum, the conveyor belt is connected with

the active drum and the driven drum, and the outer circle of the active drum is

wrapped with a rubber layer.

The beneficial effects of the above technical solutions are as follows: compared with

the existing technology, the utility model loosens the soil material in advance through

the screening mechanism arranged at the inlet of the bin to avoid blockage and

accumulation at the inlet. The loosened soil material is loosened twice at the bottom

of the bin through the stirring mechanism to avoid the material arching. The soil

material falling from the outlet of the bin falls to the metering and conveying

mechanism for metering and conveying to the mixing station for mixing. The utility

model can make the soil material fall smoothly, effectively improve the batching

speed, and ensure the accuracy of soil material measurement. FIGURE LEGENDS Fig.1 is a structural schematic diagram of a special device for cement and soil mixing

provided by an embodiment of the utility model;

Fig.2 is the right view of Fig.1;

SPECIFICATION

Fig.3 is the top view of the screen in Fig. 2;

Fig.4 is the connection diagram of the screen and the bin in Fig.1;

Fig.5 is a locally enlarged view of A in Fig.1;

Fig.6 is the top view of the mixing mechanism in the embodiment of the utility model;

Fig.7 is an A-A section view of Fig.6

In the figure: 1- rack; 2-bin; 3-vibrator; 4- screen mesh; 5- support seat; 6- guide

sleeve; 7-spring; 8-guide pillar; 9- stirring motor; 10- mixing shaft; 11- stirring arm;

110- broken arch blade; 12-fixed set; 120-first hoop; 121-second hoop; 13- Belt scale;

131-conveyor motor; 132- reducer; 133-driving drum; 134- conveyor belt; 135

driven drum; 136- transmission roller shaft; 137- skirt edge; 14- transfer belt;

-operation platform; 15 - fence.

MODE OF CARRYINGOUT THE INVENTION

In order to make the purpose, technical scheme and advantages of the utility model

more clear, the utility model is further described in detail in combination with the

attached drawings and specific embodiments below. It is understood that the specific

embodiments described herein are only used to explain the utility model and are not

used to define the utility model.

As shown in fig. 1, the utility model provides a special feeding device for cement and

soil mixing, which comprises a plurality of bins 2 arranged in parallel on the rack 1,

the inlet of the bin 2 is provided with a screening mechanism for loose soil material,

and the bottom of the bin 2 is provided with a stirring mechanism for the soil material

in the secondary bin 2; a metering and conveying mechanism is arranged below the

outlet of the bin 2 for measuring and conveying soil materials.

Compared with the existing technology, the utility model has the advantages of simple

and compact structure and high working efficiency. Through the screening mechanism,

the soil material is loosened and screened in advance to avoid blockage and

accumulation of the outlet of the bin, and then the soil material of the bin is loosened

twice by the stirring mechanism at the bottom to avoid the material arching at the

discharge port. The utility model can make the soil material fall smoothly, effectively

SPECIFICATION

improve the batching speed, and ensure the accuracy of soil material measurement. In

a preferred embodiment of the utility model, as shown in Fig.1-3, the screening

mechanism comprises a vibrator 3 and a screen mesh 4, wherein the vibrator 3 is

connected with a screen mesh 4; and the screen mesh 4 is horizontally arranged at the

upper opening end of the bin 2 through the spring support. In view of the screen mesh

number of the feeding inlet of the bin, and the soil permeability rate is small, in the

process of unloading the soil from the top position of the loader's bucket, the soil

material falls and compresses each other and accumulates into a group, which

gradually expands and blocks most of the screen mesh. Therefore, the screen mesh

grille is fixed on the inlet of the bin through the spring support, and the screen mesh is

excited by the vibrator to slow down the extrusion and accumulation of the soil in the

fall and through the screen mesh.

In a specific embodiment of the utility model, as shown in Fig.4, the spring support

comprises a support seat 5, a guide sleeve 6, a spring 7 and a guide pillar8, the

longitudinal section of the support seat 5 is 7- shaped, the two ends of the support seat

is fixed on the inner wall of the bin 2, the upper surface of the support seat 5 is

horizontally arranged; the guide sleeve 6 is arranged on the upper surface of the

support seat 5, the guide pillar 8 is arranged on the lower surface of the screen mesh 4,

the guide pillar 8 and the inner hole of the guide sleeve 6 slide together. Spring 7 is

arranged on the outside of the guide sleeve 6, the upper end of spring 7 isfixedly

connected with the screen mesh 4, and the lower end of spring 7 isfixedly connected

with the support seat 5. The rectangular vibration frame is made of channel steel, and

the screen mesh is welded and fixed on the frame. The guide pillar is welded and

fixed on the lower surface of the four corners of the frame,the vibrator is installed

above the frame to drive the high frequency vibration of the screen mesh grille, so that

the soil mass can be avoided and the soil mass can easily pass through the screen

mesh;the material of grille screen mesh is changed from rebar steel to bend iron group,

which is made of vertical welding.

To further optimize the above technical scheme, an attached vibrator is set in the

SPECIFICATION

middle and upper part of the outer wall of the bin to prevent the soil material from sticking to the inner wall of the bin and affecting the soil material to pass through the bin. In a preferred embodiment of the utility model, as shown in Fig.6 and 7, the stirring mechanism comprises two reverse rotation stirring shaft 10 driven by a stirring motor 9, two stirring shaft 10 parallel interval is arranged at the bottom of the bin 2; the outer circle of the stirring shaft 10 is provided with a plurality of stirring arms 11 along the radial direction of its length, and the stirring arms 11 on the two stirring shaft 10 are staggered; and the stirring motor 9 and the two stirring shafts 10 are arranged on the frame 1. Because the structure form of the bin is an inverted cone, the upper opening is large, the lower opening is small, when a large amount of rapid soil material passes through, it will produce congested and joined-block in the middle and lower part, forming arched soil layer and unable to feed or intermittent feeding, affecting the subsequent soil material through, thus affecting the batching capacity. As a preferred scheme, as shown in Fig. 6 and 7, the mixing arm 11 is designed to be L-shaped, and the long side of the mixing arm 11 has a radian. The short side of the mixing arm is the broken arch blade 110. The broken arch blade 110 of the stirring arm 11 on the same stirring shaft 10 is in the same direction, and the broken arch blade 110 of the stirring arm 11 on the other stirring shaft 10 is arranged in the opposite direction. Using the broken arch blade of the structure can effectively cut the soil and break the arch, and force the soil to be transported downward through the double horizontal shaft. Wherein two stirring shafts 10 pass through a plurality of bin 2, the stirring motor 9 is arranged on one end of the stirring shaft 10, the other end of the stirring shaft 10 is arranged on the bearing seat; the stirring motor (9) is one or two, and the stirring motor (9) drives two stirring shafts (10) to rotate through a transmission component. The two stirring shafts rotate in opposite directions, which can effectively stir loose soil. In the specific design, two 7.5KW power stirring motor reducers are installed in the

SPECIFICATION

middle and lower positions of the bin, which drive the stirring shaft and stirring arm to rotate, continuously stirring the soil material, forcing the cutting to break the soil and the arch, and has the function of forcing downward conveying the soil material. In the work, start the stirring motor, drive the horizontal double stirring shaft to rotate through the reducer and coupling, and reverse rotation of the two shafts drives the stirring arm and the stirring blade to rotate, stirring and cutting the soil material, not only break the arch soil and loose soil, but also forced downward mixing and conveying soil material, so that the soil material quickly downward through the inlet fall to the measuring, output belt machine, improve the falling capacity of soil material in the hopper, and then improve the production capacity of batching. In order to further optimize the above technical scheme, as shown in Fig.7, the long side of the stirring arm 11 is arranged on the fixed sleeve 12, the fixed sleeve 12 is a split structure, the fixed sleeve 12 comprises the first hoop 120 and the second hoop 121, one end of the first hoop 120 and the second hoop 121 isfixedly connected and the other end is flexibly connected, used to fix the first hoop 120 and the second hoop 121 on the outer circle of the stirring shaft 10; the stirring arm 11 isfixedly arranged on the outer surface of the first hoop 120 or the second hoop 121, and the circular groove of the first hoop 120 and the second hoop 121 is matched with the stirring shaft 10. The structure is convenient for installation, disassembly and maintenance of the stirring arm. In a specific embodiment of the utility model, as shown in Fig.2, the described bin is a hollow cavity with a large upper opening and a small lower opening, the cross section of the bin is rectangular, and the inclination angle a of the two long sides of the bin is 630and 64°. During the specific production, the size of the discharge port of the lower bin can be increased, that is, the discharging port is changed from 730mm*650mm to 1400mm*730mm, the inclination angle of the long steel plate on both sides is changed from 51° and 64° to 63° and 64°, and the volume of the bin is increased from Om3 to 11m3 , the discharging area of the bin has changed from 0.4745 m2 to 1.022 m2 ,

which has more than doubled and greatly improved the passing capacity. Because the

SPECIFICATION

long side hopper wall inclination of the bin from the original 510 to 63°, increases 12°,

so that the material is not easy to stick to the surface of the inner wall, and easier to

make the soil slide, so as to improve the production capacity.

In a specific embodiment of the utility model, as shown in Fig.1, 2 and 5, the metering

conveying mechanism comprises a plurality of belt scales 13 and conveyor belt 14, a

plurality of belt scales 13 corresponding to the lower part of a plurality of the lower

hopper 2, the conveying belt 14 is arranged at the lower part of a plurality of belt

scales 13, used to transport the soil material to a side of the mixing station. Wherein

the belt scale 13 comprises a conveyor motor 131, a reducer 132, a driving drum 133,

a driven drum 135 and a conveyor belt 134, the output shaft of the conveyor motor

131 and the input shaft of the reducer 132 are coaxially fixed, the conveyor belt 134 is

connected with the driving drum 133 and the driven drum 135, and the outer circle of

the driving drum 133 is wrapped with a rubber layer. The conveying motor, reducer,

driving roller and driven roller are all arranged on the supporting frame. The top of

the supporting frame is provided with several transmission roller axes 136 for

supporting the conveyor belt, and skirt 137 is provided on both sides of the conveyor

belt. Due to the long dimension of the discharge port of the bin changing from the

original 730mm to 1400mm, and the wide dimension changed from the original

650mm to 730mm, the increase of the discharge port greatly increased the amount of

feeding soil, and the original conveyor capacity of the belt scale was obviously

insufficient. The original belt transmission drum motor power and mechanism of the

belt scale from 4KW power electric drum to 7.5KW external transmission motor

reducer, increase the transmission capacity of the belt scale; a rubber layer is added on

the outer surface of the driving drum to increase the friction between the surface of

the driving drum and the conveyor belt, so as to prevent the overload of the conveyor

belt from stopping or the main transmission drum and the conveyor belt from slipping;

as the width of the inlet is increased, the width of the transmission belt for metering is

also widened accordingly. In this way, the soil material measurement capacity is

increased, the accuracy is improved, the stability is better, and working life is

SPECIFICATION

prolonged.

In a specific embodiment of the utility model, as shown in Fig.2, an upward extending

guard plate 15 is arranged around the upper opening of the bin 2 to avoid the soil

material falling on the outside of the bin during the feeding process; the side of the bin

2 is provided with an operating platform 16, and the edge of the operating platform 16

is provided with a guardrail 17 to facilitate the installation and maintenance of the

staff.

The utility model is used for the batching measurement of soil material and other

aggregate, and there is basically no accumulated soil material at the upper screen

mesh grille; the internal soil of the bin passes smoothly without accumulation, vault

and soil masses phenomenon; belt scales measure accurately and run smoothly. The

aggregate batching production capacity increased by 3.5 times from the original

1OOT/h to 350T/h, effectively improving the batching capacity, and the mixing quality

can meet the requirements of high-speed rail improved soil subgrade construction.

The advantages are as follows:

1. The feeding port of the bin is not easy to block and accumulate, and the aggregate

has good pass ability and high efficiency;

2. The middle of the bin is not easy to agglomerate, arch, with forced mixing,

crushing, forced feeding functions, greatly improve the aggregate forced through and

production capacity;

3. After the size of the inlet of the bin becomes larger, the hopper wall is fast and the

discharging capacity is greatly improved

4. The discharging metering capacity is increased, the accuracy is improved, and the

belt working is prolonged;

5. The requirement of aggregate performance index can be reduced and its

adaptability can be greatly improved.

6. High degree of specialization, safe and reliable performance, high efficiency.

In this paper, a specific embodiment is used to illustrate the principle and

implementation mode of the utility model. The above embodiments are only used to

SPECIFICATION

help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in the technical field, without deviating from the principle of the utility model, a number of improvements and modifications can be made to the utility model, which also fall within the scope of protection of the claims of the utility model.

Claims

1. The utility model relates to a special feeding device for cement and soil mixing is

characterized by including a plurality of bins arranged on the rack side by side, the

inlet of the bin is provided with a screening mechanism for loose soil material, the

bottom of the bin is provided with a mixing mechanism for secondary loose soil

material in the bin; a metering and conveying mechanism is arranged below the outlet

of the bin for measuring and conveying soil materials.

2. According to claim 1, the described special feeding device for cement and soil

mixing is characterized by the screening mechanism comprises a vibrator and a screen

mesh, wherein the vibrator is connected with the screen mesh; and the screen mesh is

horizontally arranged at the upper open end of the bin through a spring support.

3. According to claim 2, the described special feeding device for cement and soil

mixing is characterized by the spring support comprises a support seat, a guide sleeve,

a spring and a guide pillar, the longitudinal section of the support seat is 7-shaped, the

two ends of the support seat is fixed on the inner wall of the bin, the upper surface of

the support seat is horizontally arranged, the guide sleeve is arranged on the upper

surface of the support seat, the guide pillar is arranged on the lower surface of the

screen mesh, the guide pillar and the inner hole of the guide sleeve sliding match; the

upper end of the spring is fixedly connected with the screen mesh, and the lower end

of the spring is fixedly connected with the support seat.

4. According to claim 1, the described special feeding device for cement and soil

mixing is characterized by the stirring mechanism comprises two reverse rotating

stirring shafts driven by a stirring motor, two stirring shafts are arranged in parallel

intervals at the bottom of the bin; the outer circle of the stirring shaft is provided with

a plurality of stirring arms radially along the length direction, and the stirring arms on

are arranged on the rack.

5. According to claim 4, the described special feeding device for cement and soil

mixing is characterized by the stirring arm is L-shaped, the long side of the stirring

arm is with a radian, the short side of the stirring arm is a broken arch blade, the blade

CLAIMS of the broken arch of the stirring arm on the same stirring shaft is in the same

direction, and the blade of the broken arch of the stirring arm on the other stirring

shaft is arranged in the opposite direction.

6. According to claim 4, the described special feeding device for cement and soil

mixing is characterized by the long side of the stirring arm is arranged on a fixed

sleeve, the fixing sleeve is a split structure, the fixing sleeve comprises a first hoop

and a second hoop, one end of the first hoop and the second hoop is piped and the

other end is flexibly connected, which is used to fix the first hoop and the second

hoop on the outer circle of the stirring shaft; the stirring arm isfixedly arranged on the

outer surface of the first hoop or the second hoop, and the circular groove of the first

hoop and the second hoop is matched with the stirring shaft.

7. According to claim 4, the described special feeding device for cement and soil

mixing is characterized by two stirring shafts through a plurality of bins, the stirring

motor is arranged at one end of the stirring shaft, the other end of the stirring shaft is

arranged on the bearing seat; the stirring motor is one or two, and the stirring motor

drives two stirring shafts to rotate through a transmission component.

8. According to claim 1, the described special feeding device for cement and soil

mixing is characterized by the bin is a hollow cavity with a large upper opening and a

small lower opening, the cross section of the bin is rectangular, and the inclination

angle a of the two long sides of the bin is 63 and 64.

9. According to claim 1-8, the described special feeding device for cement and soil

mixing is characterized by the metering conveying mechanism comprises a plurality

of belt scales and conveyor belts, a plurality of belt scales corresponding to the lower

part of the bin outlet, the transmission belt is arranged under a plurality of belt scales,

used for conveying soil material to a side of the mixing station.

10. According to claim 9, the described special feeding device for cement and soil

mixing is characterized by the belt scale comprises a conveying motor, a reducer, a

driving drum, a driven drum and a conveyor belt, the output shaft of the conveying

motor and the input shaft of the reducer are coaxial fixed, the output shaft of the

reducer is coaxially fixed with the rotating shaft of the active drum, the conveyor belt

CLAIMS is connected with the active drum and the driven drum, and the outer circle of the active drum is wrapped with a rubber layer.

Fig.2 Fig.1 DRAWINGS

Fig.3 DRAWINGS

Fig.4 DRAWINGS

Fig.6 Fig.5 DRAWINGS

Fig.7 DRAWINGS