CN205291257U - Stabilized soil mixer - Google Patents

Abstract

The utility model discloses a stabilized soil mixer, including single horizontal axis mixer of continuous type and continuous type dual horizontal axle mixer, the single horizontal axis mixer of continuous type and continuous type dual horizontal axle mixer be through switching on mechanism's connection, switch on the mechanism include the blanking violently manage with the feeding band pulley, likepowder matrix is by the one -level stirring discharge gate output of the single horizontal axis mixer of continuous type, via switch on blanking in the mechanism violently manage by second grade stirring feed inlet fall into in the continuous type dual horizontal axle mixer, gather materials and get into continuous type dual horizontal axle mixer by the transmission of feeding band pulley. The utility model discloses a stabilized soil mixer carries out high -speed stirring with likepowder matrixes such as cement, lime and water together in the one -level churn, owing to do not have great the gathering materials of particle diameter in the mixture, reduced the barrier action to the granule, and while stirring vane is the strong shear effect of rotation in -process formation at a high speed, very easily hits the bits of broken glass with the granule, makes the abundant aquation of likepowder matrix.

Description

stabilized soil mixer

technical field

The utility model belongs to the technical field of stabilized soil mixers, and relates to a stabilized soil mixer.

Background technique

With the development of my country's economic construction, the traffic load on the highway is becoming more and more heavy; at the same time, the sustainable development of highway construction and the need to improve the durability of the pavement structure are becoming more and more urgent. Practice has shown that improving the construction quality of the base and subbase is conducive to improving the durability of the overall structure of the pavement and prolonging the service life. As the core part of the stabilized soil factory mixing equipment, the continuous forced mixer is directly related to the mixing quality of the finished stabilized soil material, and affects the construction quality of the pavement base layer.

The existing stabilized soil mixer generally adopts a continuous double-horizontal shaft structure. Raw materials such as cement or lime powder binder, coarse and fine aggregates, and water are all metered, and are continuously input from the axial end of the mixer, and pass through the blades in the machine. After continuous pushing and stirring, the material is continuously discharged from the other end of the mixer shaft to form a mixture. However, due to the limitation of the length of the mixing drum, the residence time of the stabilized soil material in the mixer is relatively short, generally within 10s at home and abroad, which easily leads to poor uniformity of the produced stabilized soil mixture. At the same time, all the components of the stabilized soil are put into the mixer at one time, and the cement or lime powder binder will quickly form aggregates of different sizes when it meets water. Friction and impact make some aggregates decompose and destroy, but those behind the coarse aggregate and stirring blades are not easy to be damaged; in addition, due to the limitation of aggregate segregation, the stirring line speed generally needs to be controlled at about 3.0m/s, Therefore, the lower linear speed also greatly affects the shear damage of the mixing blades on the powdery aggregates. The agglomeration phenomenon of the powdery binder not only affects the hydration of the binder and the coating of the aggregate, resulting in waste of raw materials such as cement, but also reduces the ease of construction and hardening strength of the finished material.

Contents of the invention

In view of the above-mentioned problems or defects in the prior art, the purpose of this utility model is to provide a stabilized soil mixer that can improve the mixing uniformity of finished materials, reduce the usage of binders and ensure working efficiency.

In order to achieve the above object, the utility model adopts the following technical solutions:

A stabilized soil mixer, comprising a continuous single-shaft mixer and a continuous twin-shaft mixer, the continuous single-shaft mixer is provided with a first-stage stirring outlet, and the continuous twin-shaft mixer is provided with a second-stage stirring feed The continuous single-horizontal-shaft mixer includes a first-level mixing drum, a first-level mixing shaft is arranged in the first-level mixing tube, and a first-level mixing blade is distributed on the first-level mixing shaft; a second-level stirring blade is arranged in the continuous double-shaft mixer. shaft, the continuous single-shaft mixer and the continuous twin-shaft mixer are connected through a conduction mechanism, and the conduction mechanism includes a blanking horizontal tube and a feed pulley; The first-stage stirring outlet is output, and falls into the continuous double-horizontal shaft mixer from the second-stage stirring inlet through the blanking horizontal tube in the conduction mechanism; the aggregate is transported by the feeding pulley into the continuous double-horizontal mixer. shaft mixer.

Specifically, the blanking horizontal tube is arranged horizontally above the secondary stirring feed inlet of the continuous twin-shaft mixer, and the blanking horizontal tube faces the side wall of the continuous twin-shaft mixer along the length of the tube wall. Orientation set with multiple blanking holes

Specifically, the conduction mechanism includes a blanking vertical pipe, the top of the blanking vertical pipe communicates with the first-stage stirring outlet of the continuous single-horizontal shaft mixer, and the bottom end of the blanking vertical pipe communicates with the falling The material horizontal pipe is connected.

Further, the conduction mechanism also includes a feeding hood, the blanking horizontal tube and the feeding pulley are arranged in the feeding hood, and the feeding pulley is arranged at the second stage of the continuous twin-shaft mixer. above the inlet.

Further, the mixer also includes a support frame and a frame, the continuous twin-shaft mixer is arranged above the frame, the support frame is arranged above the frame, and the continuous single-shaft mixer is arranged above the support frame.

Specifically, the primary stirring blade includes an arc-shaped front wall and a rear wall, and two side surfaces are formed between the arc-shaped front wall and the rear wall.

Further, the linear velocity of the primary stirring shaft is 3 to 5 times that of the secondary stirring shaft.

The angle formed between the primary mixing drum and the horizontal plane is 1°-2°.

Compared with the prior art, the utility model has the following technical effects:

1. Set up a continuous single-horizontal shaft mixer. Powdery binders such as mud and lime enter the continuous single-horizontal shaft mixer together with water for high-speed mixing. Since there is no aggregate with a large particle size in the mixture, the impact on the aggregates is reduced. At the same time, the strong shearing effect formed during the high-speed rotation of the stirring blade can easily crush the aggregates and fully hydrate the powdery binder.

2. Set up a conduction mechanism to transport the powdery binder conveyed by the continuous single-shaft mixer and the aggregate conveyed by the feed pulley to the continuous twin-shaft mixer for low-speed mixing to reduce the agglomeration of powdery particles Phenomenon, improve the dispersibility of powdery particles, increase the degree of hydration, not only improve the uniformity of mixing, reduce the use of powdery binder, but also ensure the work efficiency.

3. The first-stage mixing blade has two sides, which increases the retention and mixing time of the material in the first-stage mixing drum. Under the same stirring time, the number of stirring times of the material is increased, so that the material can be fully stirred in a short time. Improved stirring effect.

Description of drawings

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the left view of the utility model;

Fig. 3 is the structural representation of continuous single horizontal shaft mixer;

Fig. 4 is the front view of primary stirring blade;

Fig. 5 is a side view of a primary stirring blade;

The symbols in the figure represent: 1—continuous single horizontal shaft mixer, 1-1—first-stage stirring outlet, 1-2—first-stage mixing drum, 1-3—first-stage stirring shaft, 1-4—first-stage stirring Blade, 1-4-1—curved front wall, 1-4-2—rear wall, 1-4-3—side, 1-5—first-stage motor, 1-6—feeding barrel, 1-7— Pusher shaft, 1-8—the first coupling, 1-9—water inlet, 1-10—first-level feed inlet;

2—continuous twin-shaft mixer, 2-1—secondary mixing inlet, 2-2—secondary stirring shaft, 2-3—secondary mixing drum, 2-4—second coupling, 2- 5—secondary motor, 2-6—secondary stirring outlet, 2-7—unloading plate;

3—conducting mechanism, 3-1—blanking horizontal tube, 3-2—feeding pulley, 3-3—blanking vertical pipe, 3-4—feeding cover, 3-5—flange cover, 3 -6—Hose;

4—support frame, 4-1—leg, 4-2—top plate, 4-3—reinforcing plate, 5—frame.

The scheme of the present utility model is further explained and described in detail in conjunction with the accompanying drawings and specific embodiments.

detailed description

According to the above technical scheme, see Fig. 1-2, the stabilized soil mixer of the present invention includes a continuous single horizontal shaft mixer 1 and a continuous double horizontal shaft mixer 2, and the continuous single horizontal shaft mixer 1 is provided with a first-stage stirring discharge Inlet 1-1, the continuous twin-shaft mixer 2 is provided with a secondary mixing feed inlet 2-1, the continuous single-shaft mixer 1 includes a primary mixing drum 1-2, a primary mixing drum 1-2 A first-stage stirring shaft 1-3 is provided inside, and a first-stage stirring blade 1-4 is distributed on the first-stage stirring shaft 1-3; a second-stage stirring shaft 2-2 is arranged in the continuous twin-shaft mixer 2; The horizontal shaft mixer 1 and the continuous double horizontal shaft mixer 2 are connected through a conduction mechanism 3, which includes a blanking horizontal tube 3-1 and a feeding pulley 3-2; the powdery binder is fed by a continuous single horizontal shaft The first-stage stirring outlet 1-1 of the mixer 1 is output, and falls into the continuous twin-shaft mixer 2 from the second-stage stirring inlet 2-1 through the blanking horizontal tube 3-1 in the conduction mechanism 3 Inside; the aggregate is transferred into the continuous twin-shaft mixer 2 by the feed pulley 3-2.

Wherein, referring to Fig. 3, the continuous single-horizontal shaft mixer 1 comprises a primary motor 1-5, a feeding cylinder 1-6 and a primary mixing cylinder 1-2, and a feeding cylinder 1-6 and a primary mixing cylinder 1-2 Connected, the feeding cylinder 1-6 is provided with a pushing shaft 1-7, the primary mixing cylinder 1-2 is provided with a primary stirring shaft 1-3, and the primary motor 1-5 passes through the first coupling 1-8 Connect the pushing shaft 1-7, and the pushing shaft 1-7 is connected with the primary stirring shaft 1-3. There is a water inlet 1-9 in the feeding cylinder 1-6, and the powdery binder such as cement and lime enters the inner part of the feeding cylinder 1-6 from the primary feeding inlet 1-10 provided on the feeding cylinder 1-6. Pushed by the pusher shaft 1-7, it enters the first-stage mixing drum 1-2, and the first-stage mixing drum 1-2 is provided with a water inlet 1-9, and powdery binders such as cement and lime are mixed together with water in the first-stage High-speed stirring is carried out in the cylinder 1-2. Since there is no aggregate with a large particle size in the mixture, the barrier effect on the aggregates is reduced. At the same time, the strong shearing effect formed during the high-speed rotation of the stirring blades easily breaks the aggregates. Fully hydrate the powdered binder. The angle formed between the first-stage mixing drum 1-2 and the horizontal plane is 1°-2°, which facilitates the output of materials by the continuous single-horizontal shaft mixer 1.

The powdery binder is output from the first-stage stirring outlet 1-1 of the continuous single-shaft mixer 1, and falls into the continuous twin-shaft mixer 2 through the conduction mechanism 3; the continuous twin-shaft mixer 2 includes a second-stage The mixing drum 2-3, two secondary stirring shafts 2-2 are arranged in parallel in the secondary mixing drum 2-3, and the secondary stirring feeding port 2-1 is arranged on the secondary mixing drum 2-3, The powdery binder dropped by the blanking horizontal tube 3-1 in the conduction mechanism 3 enters the secondary mixing drum 2-3 from the secondary mixing feed port 2-1, and the feeding pulley 3-2 transports the aggregate Go to the top of the secondary stirring feed inlet 2-1 and enter the secondary mixing drum 2-3; the ends of the two secondary stirring shafts 2-2 are provided with synchronous gears, and the two synchronous gears mesh to realize two The synchronous rotation of the secondary stirring shaft 2-2; the other end of one of the secondary stirring shafts 2-2 is connected to the secondary motor 2-5 through the second coupling 2-4; the rotation of the secondary motor 2-5 drives a secondary The primary stirring shaft 2-2 rotates, and due to the meshing action of the two secondary stirring shafts 2-2, the other secondary stirring shaft 2-2 rotates synchronously to realize the low-speed stirring of aggregate and powdery mixture and reduce powdery particles The agglomeration phenomenon, improve the dispersion of powdery particles, increase the degree of hydration, not only improve the uniformity of mixing, reduce the use of powdery binder, but also ensure the work efficiency. The secondary mixing drum 2-3 is provided with a secondary stirring discharge port 2-6, and the secondary stirring discharge port 2-6 is provided with a discharge plate 2-7, and the evenly stirred aggregate and powdery binder are produced by Secondary stirring outlet 2-6 output.

The linear velocity of the continuous single-shaft mixer 1 is 3 to 5 times that of the continuous twin-shaft mixer 2, and the linear velocity of the continuous twin-shaft mixer 2 is about 2.5 to 3.5 m/s. The powdery binder composed of cement and lime will quickly form aggregates of different sizes when it meets water. It has been verified by experiments that if the stirring line speed of the continuous single-shaft mixer 1 is lower than that of the continuous twin-shaft mixer 2 If the speed is 3 times, the formed aggregates cannot be fully broken up. Only when the line speed is higher than 3 times, can the original secondary agitator be able to obviously eliminate the shortcoming that the original secondary agitator cannot charge to shear the aggregates due to the low speed; however, if the speed is too high, It will increase energy consumption, cause a series of problems such as heating of the device, and also increase the cost of machine manufacturing. Therefore, the stirring line speed of the continuous single-shaft mixer 1 is set to 3 to 5 times that of the continuous twin-shaft mixer 2. times.

Further, the blanking horizontal tube 3-1 is arranged horizontally above the secondary stirring feed inlet 2-1 of the continuous twin-shaft mixer 2, and the blanking horizontal tube 3-1 faces the continuous twin-shaft mixer A plurality of blanking holes are arranged on one side of the pipe wall along the length direction of the pipe wall. Both ends of the blanking horizontal tube 3-1 are provided with flange covers 3-5 to ensure that the powdery binder is only evenly blanked from the blanking holes at the bottom of the blanking horizontal tube 3-1. The blanking horizontal tube 3-1 is connected with the first-stage mixing feed inlet 1-10 of the continuous single-horizontal shaft mixer 1, and the powdery binder is output from the first-stage stirring outlet 1-1 into the blanking horizontal tube 3-1 Finally, it falls into the secondary mixing drum 2-3 of the continuous twin-shaft mixer 2 from the blanking hole.

Specifically, the conduction mechanism 3 includes a blanking vertical tube 3-3, which is arranged perpendicular to the blanking horizontal tube 3-1, and the top of the blanking vertical tube 3-3 is connected to the continuous The primary stirring outlet 1-1 of the single-horizontal-shaft mixer 1 is connected, and the bottom end of the vertical blanking pipe 3-3 is connected with the horizontal blanking pipe 3-1.

The powdery mixture enters the horizontal blanking tube 3-1 from the first-stage stirring outlet 1-1 of the continuous single-horizontal shaft mixer 1 via the vertical tube 3-3.

Further, a hose 3-6 is arranged between the top of the blanking vertical pipe 3-3 and the first-stage stirring outlet 1-1 of the continuous single-horizontal shaft mixer 1, so as to facilitate the connection between the blanking vertical pipe 3-3 and the continuous The connection between the primary stirring outlet 1-1 of the single horizontal shaft mixer 1.

Further, the conduction mechanism 3 also includes a feed cover 3-4, the blanking horizontal tube 3-1 and the feed pulley 3-2 are arranged inside the feed cover 3-4, and the feed pulley 3 -2 is arranged above the secondary stirring feed inlet 2-1 of the continuous twin-shaft mixer 2. The feed pulley 3-2 transports the aggregate to the inside of the continuous twin-shaft mixer 2.

Further, the mixer also includes a support frame 4 and a frame 5, the continuous twin-shaft mixer 2 is set above the frame 5, the support frame 4 is set above the frame 5, and the above support frame 4 is set Continuous single horizontal shaft mixer1.

Described support frame 4 comprises support leg 4-1 and top board 4-2, and the top of support leg 4-1 is provided with reinforcement board 4-3, and reinforcement board 4-3 connects top board 4-2, supports described above top board 4-2. Continuous single horizontal shaft mixer 1.

Further, referring to Figures 4 and 5, the primary stirring blade 1-4 includes an arc-shaped front wall 1-4-1 and a rear wall 1-4-2, and an arc-shaped front wall 1-4-1 and a rear wall 1 Two side surfaces 1-4-3 are formed between -4-2, and the side surfaces 1-4-3 are approximately triangular in structure. While the material is moving along the direction of the stirring shaft during the stirring process, due to the blocking effect of the two sides 1-4-3 of the two first-stage stirring blades 1-4, between two adjacent first-stage stirring blades 1-4 Repeatedly move back and forth between, so under the action of the same stirring line speed, the retention and stirring time of the material in the primary mixing drum 1-2 is increased. It can be fully stirred in a short time, which improves the stirring effect.

The mixing method of the graded continuous stabilized soil mixer of the present utility model specifically comprises the following steps:

(1) Powdered binders such as cement and lime enter the feeding barrel 1-6 from the first-level feed port 1-10, and the first-level motor 1-5 is turned on, the pushing shaft 1-7 and the first-level stirring shaft 1- 3 rotate at the same time, the rotational speed is 3 to 5 times of the linear speed of the secondary stirring shaft 2-2, the pushing shaft 1-7 pushes the powdery binder into the primary mixing drum 1-2, and the water is fed by a The water inlet of the first-stage mixing drum 1-2 is injected, and the first-stage stirring blade 1-4 on the first-stage stirring shaft 1-3 stirs the powdery binder, and the mixture is output from the first-stage stirring outlet 1-1;

(2) The powdery binder output from the primary mixing outlet 1-1 enters the secondary mixing drum 2-3 through the blanking horizontal tube 3-1, and the feeding pulley 3-2 transports the aggregate to the secondary mixing drum 2-3. Inside the mixing drum 2-3;

(3) Turn on the secondary motor 2-5 to drive the secondary stirring shaft 2-2 to rotate. The secondary stirring blades on the secondary stirring shaft 2-2 stir the powdery binder and aggregate. After stirring fully, open the Unloading plate 2-7, the stirred material is discharged from the secondary stirring outlet 2-6;

(4) Steps (1) to (3) are repeated until all materials are stirred.

Claims (8)

1. A stabilized soil mixer, comprising a continuous single-shaft mixer (1) and a continuous twin-shaft mixer (2), the continuous single-shaft mixer (1) is provided with a primary stirring discharge port (1-1 ), the continuous twin-shaft mixer (2) is provided with a secondary stirring inlet (2-1), and the continuous single-horizontal shaft mixer (1) includes a primary mixing drum (1-2), a primary The mixing drum (1-2) is provided with a first-stage stirring shaft (1-3), and a first-stage stirring blade (1-4) is distributed on the first-stage stirring shaft (1-3); the continuous twin-shaft mixer (2) A secondary stirring shaft (2-2) is provided, and it is characterized in that the continuous single horizontal shaft mixer (1) and the continuous double horizontal shaft mixer (2) are connected by a conduction mechanism (3), and the conduction mechanism ( 3) Including the blanking horizontal tube (3-1) and the feeding pulley (3-2); the powdery binder is output from the first-stage stirring outlet (1-1) of the continuous single-horizontal shaft mixer (1) , fall into the continuous twin-shaft mixer (2) by the secondary stirring feed inlet (2-1) via the blanking horizontal tube (3-1) in the conduction mechanism (3); Feed pulley (3-2) conveys into continuous twin-shaft mixer (2). 2. the stabilized soil mixer as claimed in claim 1, is characterized in that, described blanking horizontal tube (3-1) is in the secondary stirring inlet (2-1) of continuous twin-horizontal shaft mixer (2) The upper side of the horizontal tube is arranged horizontally, and a plurality of blanking holes are arranged on the side tube wall of the blanking horizontal tube (3-1) facing the continuous twin-shaft mixer (2) along the length direction of the tube wall. 3. The stabilized soil mixer according to claim 2, characterized in that, the conduction mechanism (3) comprises a blanking standpipe (3-3), and the top of the blanking standpipe (3-3) is connected to the The first-stage stirring outlet (1-1) of the continuous single-horizontal shaft mixer (1) is connected, and the bottom end of the vertical blanking pipe (3-3) is connected with the horizontal blanking pipe (3-1). 4. The stabilized soil mixer as claimed in claim 3, characterized in that, the conduction mechanism (3) also includes a feed cover (3-4), and the drop cover (3-4) is set in the feed cover (3-4). Material horizontal pipe (3-1) and feed pulley (3-2), the feed pulley (3-2) is arranged on the secondary stirring feed inlet (2) of described continuous twin-horizontal shaft mixer (2) -1) above. 5. The stabilized soil mixer according to any one of claims 1-4, wherein the mixer also includes a support frame (4) and a frame (5), and the above frame (5) is provided with the For the continuous twin-shaft mixer (2), the support frame (4) is arranged above the frame (5), and the above-mentioned continuous single-horizon shaft mixer (1) is arranged above the support frame (4). 6. The stabilized soil mixer according to claim 1, characterized in that, said primary mixing blade (1-4) comprises an arc-shaped front wall (1-4-1) and a rear wall (1-4-2) , two side surfaces (1-4-3) are formed between the arc-shaped front wall (1-4-1) and the rear wall (1-4-2). 7. The stabilized soil mixer according to claim 1, characterized in that the linear speed of the primary stirring shaft (1-3) is 3 to 5 times the linear speed of the secondary stirring shaft (2-2). 8. The stabilized soil mixer according to claim 1, characterized in that, the angle formed between the primary mixing drum (1-2) and the horizontal plane is 1°-2°.