阅读说明：本技术 一种连续式沥青混合料搅拌设备及其控制方法 (Continuous asphalt mixture stirring equipment and control method thereof ) 是由 林海翔 于 2019-09-23 设计创作，主要内容包括：本发明公开一种连续式沥青混合料搅拌设备及其控制方法,包括搅拌机组和控制系统；搅拌机组包括上下两级设置的搅拌机A和搅拌机B,该搅拌机A和搅拌机B均包括有底座、搅拌缸体、搅拌装置、传动装置、卸料门装置及倾角调节机构,搅拌机A的出料口与搅拌机B的进料口上下连通设置；倾角调节机构调节搅拌缸体倾角度；搅拌装置由传动装置带动作旋转搅拌动作；卸料门装置安装于出料口位置以调节开度；控制系统包括PLC模块,倾角度控制模块A、转速控制模块A及开度控制模块A,以及倾角度控制模块B、转速控制模块B及开度控制模块B。本发明有效延长沥青混合料的搅拌时间,提高混合的均匀性,可适用于多种类型的沥青混合料搅拌,混合均匀性佳。(The invention discloses a continuous asphalt mixture stirring device and a control method thereof, wherein the continuous asphalt mixture stirring device comprises a stirring unit and a control system; the stirring unit comprises a stirrer A and a stirrer B which are arranged in an upper-lower two-stage manner, the stirrer A and the stirrer B respectively comprise a base, a stirring cylinder body, a stirring device, a transmission device, a discharging door device and an inclination angle adjusting mechanism, and a discharging opening of the stirrer A and a feeding opening of the stirrer B are arranged in an up-down communication manner; the inclination angle adjusting mechanism adjusts the inclination angle of the stirring cylinder body; the stirring device is driven by the transmission device to do rotary stirring action; the discharge door device is arranged at the position of the discharge hole to adjust the opening degree; the control system comprises a PLC module, a tilt angle control module A, a rotating speed control module A, an opening control module A, a tilt angle control module B, a rotating speed control module B and an opening control module B. The invention effectively prolongs the stirring time of the asphalt mixture, improves the mixing uniformity, is suitable for stirring various asphalt mixtures and has good mixing uniformity.)

1. A continuous asphalt mixture stirring device is characterized by comprising a stirring unit and a control system;

the stirring unit comprises a stirrer A and a stirrer B which are arranged in an upper-lower two-stage manner, the stirrer A and the stirrer B respectively comprise a base, a stirring cylinder body, a stirring device, a transmission device, a discharging door device and an inclination angle adjusting mechanism, the top and the bottom of the stirring cylinder body, which are close to the two ends of the stirring cylinder body, are respectively provided with a feeding hole and a discharging hole, and the discharging hole of the stirrer A and the feeding hole of the stirrer B are arranged in an up-down communication manner; the inclination angle adjusting mechanism is arranged between the base and the stirring cylinder body and is used for adjusting the inclination angle of the stirring cylinder body with the end where the discharge port is located as an inclined high end; the stirring device is arranged in the stirring cylinder body and is driven by the transmission device to rotate and stir; the discharge door device is arranged at the position of the discharge hole to adjust the opening degree;

the control system comprises a PLC module, a tilting angle control module A, a rotating speed control module A and an opening control module A which are electrically connected with the PLC module and are used for independently controlling the tilting angle, the stirring rotating speed and the discharging opening degree of the stirring cylinder A of the stirring machine A, and a tilting angle control module B, a rotating speed control module B and an opening control module B which are electrically connected with the PLC module and are used for independently controlling the tilting angle, the stirring rotating speed and the discharging opening degree of the stirring cylinder B of the stirring machine B.

2. The continuous asphalt mixing plant as claimed in claim 1, wherein the tilt angle adjustment mechanism is a lifting mechanism, the end of the mixing cylinder corresponding to the inlet port is movably hinged to the base, and the lifting mechanism is movably hinged between the mixing cylinder and the base to perform lifting adjustment to the end of the mixing cylinder corresponding to the outlet port.

3. A continuous asphalt mixing plant as defined in claim 2, wherein said lifting means is further provided with a position sensor for sensing in real time the value of the inclination of the mixing cylinder.

4. The continuous asphalt mixing plant according to claim 1, wherein the inclination angle of the mixing cylinder is an angle a between the center line of the mixing cylinder and the horizontal, and the inclination angle is controlled to be 0 ° or more and 25 ° or less.

5. The continuous asphalt mixing plant according to claim 1, wherein the PLC module records mixing tank parameters of a plurality of asphalt mixtures, each asphalt mixture type can have a plurality of mixing tank parameter settings, and the mixing tank parameters include three important parameters of mixing tank rotation speed V, mixing tank horizontal included angle a and discharge door opening L.

6. A continuous asphalt mixing plant as defined in claim 1, wherein the mixing device of mixer a has two mixing shafts arranged in parallel, and the mixing arms on the mixing shafts are arranged in the following order from the feeding end to the discharging end: feeding one and returning one to set one group, feeding one and returning one to set several groups, and then returning to set one group, wherein the corresponding back returning arm of the back returning is positioned at the back of the discharge hole; the stirring device of the stirrer B is provided with two stirring shafts which are arranged in parallel, and the arrangement form of the stirring arms on the stirring shafts is that: n feeds one and returns, and the back returns and establishes a set of, and the back that should return back the correspondence returns the arm and is located the rear of discharge gate.

7. A continuous asphalt mixture stirring control method is characterized by comprising the following steps:

1) adjusting parameters of respective mixing cylinders for continuous mixing of an upper stage and a lower stage according to the type of the asphalt mixture to be mixed and stirred, wherein the mixing cylinder A: the rotating speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of the discharge door; a stirring cylinder B: the rotating speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of the discharge door;

2) and controlling to start the stirring cylinder A and the stirring cylinder B to automatically work according to respective parameters of the stirring cylinders, feeding the asphalt mixture to be mixed and stirred from the stirring cylinder A, mixing and stirring the asphalt mixture by the stirring cylinder A, and continuously feeding the asphalt mixture into the stirring cylinder B, so that continuous stirring production of continuous feeding and continuous discharging is performed.

8. The continuous asphalt mixture stirring control method according to claim 7, wherein in the step 1), parameters of two-stage stirring cylinders corresponding to various types of asphalt mixtures are recorded into a PLC module for pre-storage; and then, directly selecting pre-stored parameters of the two-stage mixing cylinders corresponding to the asphalt mixture types according to the asphalt mixture types to be mixed and stirred.

9. The continuous asphalt mixing material mixing control method according to claim 7, wherein the horizontal included angle a of the mixing cylinder, i.e. the inclination angle value of the mixing cylinder, refers to the included angle between the center line of the mixing cylinder and the horizontal, and the included angle a is controlled to be 0 ° or more and 25 ° or less.

10. The continuous asphalt mixing material stirring control method according to claim 7, wherein the stirring form of the stirring cylinder A is as follows: the feeding end adopts three feeding and one returning, the feeding and the returning are adopted from the middle part to the discharging port, and the back end of the discharging port adopts the back returning; the stirring form of the stirring cylinder B is as follows: n is adopted to feed from the feed inlet to the discharge outlet, and the back end of the discharge outlet returns after being adopted.

Technical Field

The invention relates to the technical field of asphalt stirring, in particular to continuous asphalt mixture stirring equipment and a control method thereof.

Background

The stirring cylinder in the existing continuous asphalt mixture stirring equipment adopts a horizontally arranged structural form, and in order to improve the mixing uniformity of the asphalt mixture, the length of a stirring cylinder body is inevitably required to be prolonged, so that the stirring time of the asphalt mixture in the stirring cylinder body is prolonged, and the problems caused by the structure are that the whole weight of the stirring cylinder is large, the cost is high, and the occupied area is large. And for a stirring cylinder with a fixed structure, the adaptability to various types of asphalt mixtures is poor, and the related parameters of equipment can not be flexibly changed, so that the production efficiency is low.

In view of the above disadvantages, the present application provides a continuous asphalt mixing plant and a control method thereof.

Disclosure of Invention

The invention aims to provide a continuous asphalt mixture stirring device and a control method thereof, which can effectively prolong the stirring time of asphalt mixtures, improve the mixing uniformity, and can be suitable for stirring various asphalt mixtures with good mixing uniformity.

In order to achieve the above purpose, the solution of the invention is:

a continuous asphalt mixture stirring device comprises a stirring unit and a control system;

the stirring unit comprises a stirrer A and a stirrer B which are arranged in an upper-lower two-stage manner, the stirrer A and the stirrer B respectively comprise a base, a stirring cylinder body, a stirring device, a transmission device, a discharging door device and an inclination angle adjusting mechanism, the top and the bottom of the stirring cylinder body, which are close to the two ends of the stirring cylinder body, are respectively provided with a feeding hole and a discharging hole, and the discharging hole of the stirrer A and the feeding hole of the stirrer B are arranged in an up-down communication manner; the inclination angle adjusting mechanism is arranged between the base and the stirring cylinder body and is used for adjusting the inclination angle of the stirring cylinder body with the end where the discharge port is located as an inclined high end; the stirring device is arranged in the stirring cylinder body and is driven by the transmission device to rotate and stir; the discharge door device is arranged at the position of the discharge hole to adjust the opening degree;

the control system comprises a PLC module, a tilting angle control module A, a rotating speed control module A and an opening control module A which are electrically connected with the PLC module and are used for independently controlling the tilting angle, the stirring rotating speed and the discharging opening degree of the stirring cylinder A of the stirring machine A, and a tilting angle control module B, a rotating speed control module B and an opening control module B which are electrically connected with the PLC module and are used for independently controlling the tilting angle, the stirring rotating speed and the discharging opening degree of the stirring cylinder B of the stirring machine B.

The inclination angle adjusting mechanism is a lifting mechanism, one end of the stirring cylinder body, corresponding to the material inlet, is movably hinged on the base, and the lifting mechanism is movably hinged between the stirring cylinder body and the base so as to perform lifting adjustment on one end of the stirring cylinder body, corresponding to the material outlet.

The lifting mechanisms are two groups of lifting oil cylinders which are symmetrically arranged at the two sides of the stirring cylinder body.

The lifting mechanism is also provided with a position sensor for sensing the inclination angle value of the stirring cylinder body in real time.

The inclination angle of the stirring cylinder body is an included angle a between the central line of the stirring cylinder body and the horizontal plane, and the inclination angle value is controlled to be more than or equal to 0 degree and less than or equal to 25 degrees.

The PLC module inputs parameters of a mixing tank with various types of asphalt mixtures, each type of the asphalt mixtures can be set by a plurality of parameters of the mixing tank, and the parameters of the mixing tank comprise three important parameters of the rotating speed V of the mixing tank, the horizontal included angle a of the mixing tank and the opening degree L of a discharge door.

The stirring device of the stirrer A is provided with two stirring shafts which are arranged in parallel, and the arrangement form of the stirring arms on the stirring shafts is that: feeding one and returning one to set one group, feeding one and returning one to set several groups, and then returning to set one group, wherein the corresponding back returning arm of the back returning is positioned at the back of the discharge hole; the stirring device of the stirrer B is provided with two stirring shafts which are arranged in parallel, and the arrangement form of the stirring arms on the stirring shafts is that: n feeds one and returns, and the back returns and establishes a set of, and the back that should return back the correspondence returns the arm and is located the rear of discharge gate.

The stirring shaft is provided with 13 stirring arms, and the feeding group and the returning group of the stirring device A are 4 groups; the N feed-return of the stirring device B is 11 feed-return.

The invention also provides a continuous asphalt mixture stirring control method, which comprises the following steps:

1) adjusting parameters of respective mixing cylinders for continuous mixing of an upper stage and a lower stage according to the type of the asphalt mixture to be mixed and stirred, wherein the mixing cylinder A: the rotating speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of the discharge door; a stirring cylinder B: the rotating speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of the discharge door;

2) and controlling to start the stirring cylinder A and the stirring cylinder B to automatically work according to respective parameters of the stirring cylinders, feeding the asphalt mixture to be mixed and stirred from the stirring cylinder A, mixing and stirring the asphalt mixture by the stirring cylinder A, and continuously feeding the asphalt mixture into the stirring cylinder B, so that continuous stirring production of continuous feeding and continuous discharging is performed.

In the step 1), parameters of two stages of mixing cylinders corresponding to various types of asphalt mixtures are recorded into a PLC module for pre-storage; and then, directly selecting pre-stored parameters of the two-stage mixing cylinders corresponding to the asphalt mixture types according to the asphalt mixture types to be mixed and stirred.

Each asphalt mixture type can be provided with a plurality of parameter settings of the mixing cylinders, and the parameters of the corresponding two stages of mixing cylinders are combined or separately and independently set.

The horizontal included angle a of the stirring cylinder is the inclination angle value of the stirring cylinder, and refers to the included angle between the central line of the stirring cylinder body and the horizontal, and the included angle a is controlled to be more than or equal to 0 degree and less than or equal to 25 degrees.

The stirring form of the stirring cylinder A is as follows: the feeding end adopts three feeding and one returning, the feeding and the returning are adopted from the middle part to the discharging port, and the back end of the discharging port adopts the back returning; the stirring form of the stirring cylinder B is as follows: n is adopted to feed from the feed inlet to the discharge outlet, and the back end of the discharge outlet returns after being adopted.

After the scheme is adopted, the continuous asphalt mixture stirring equipment and the control method thereof adopt upper and lower two-stage continuous stirring, and the two-stage stirring is respectively and independently set unique stirring cylinder parameters comprising the stirring cylinder rotating speed V, the stirring cylinder horizontal included angle a and the discharge door opening L, which are cooperatively matched with each other but impossible, wherein particularly the adjustment design of the stirring cylinder horizontal included angle a is used for emphatically adjusting the discharge speed of the stirring cylinder, so that the basic purpose of controlling the yield and the asphalt mixture uniformity is achieved. Through the flexible combination regulation and control of three specific parameters of the stirring cylinder, the stirring time of the asphalt mixture can be effectively prolonged, and the mixing uniformity is improved. And the device is suitable for stirring various asphalt mixtures, and can achieve the effect of good mixing uniformity.

Drawings

FIG. 1 is a front view of the stirring apparatus of the present disclosure;

FIG. 2 is a front view of blender A;

FIG. 3 is a front view of blender B;

FIG. 4 is a schematic view of a discharge gate apparatus;

FIG. 5 is a schematic view of a stirring device A;

FIG. 6 is a schematic view of a stirring device B;

fig. 7 is a functional block diagram of the control system.

Description of the reference symbols

A blender A100, a base 11, a blending cylinder 12, a feed inlet 121, a discharge outlet 122,

the device comprises a transmission device 13, a stirring device 14, an inclination angle adjusting mechanism 15 and a discharging door device 16;

a blender B200, a base 21, a blending cylinder 22, a feed inlet 221, a discharge outlet 222,

the device comprises a transmission device 23, a stirring device 24, an inclination angle adjusting mechanism 25 and a discharge door device 26;

the control system 300, the PLC module 30,

a tilt angle control module A31, a rotational speed control module A32, an opening control module A33,

a tilt angle control module B34, a rotating speed control module B35 and an opening degree control module B36;

a frame 400.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The present disclosure relates to a continuous asphalt mixing plant, as shown in fig. 1-7, comprising a mixer set and a control system 300. The stirring unit comprises a stirrer A100 and a stirrer B200 which are arranged in an upper-lower two-stage manner, wherein the stirrer A100 and the stirrer B200 are arranged on the frame 400 in an upper-lower layer manner and are continuously stirred in an upper-lower two-stage manner.

The mixer a100 includes a base 11, a mixer cylinder 12, a transmission 13, a mixer 14, and a discharge door device 16. The structure and function of each of the devices described is known in the art (see specifically 201920729928.1 of the applicant's prior application). The following is a brief summary of relevant structures and principles of operation to facilitate understanding.

The top and bottom of the mixing cylinder 12 near both ends thereof are respectively provided with a feed port 121 and a discharge port 122, and more specifically, the mixing cylinder 12 is provided with the feed port 121 near the top of the mixing cylinder 12 near the front end thereof and the discharge port 122 near the bottom of the mixing cylinder 12 near the rear end thereof, in a front-to-rear direction in which the mixed material is stirred and conveyed. The stirring device 14 is installed in the stirring cylinder 12, and has two stirring shafts 141 arranged in parallel, the stirring shafts 141 are provided in the stirring cylinder 12 so as to extend in the front-rear direction, and stirring arms are provided on the stirring shafts 141, and the stirring arms are divided into a feed stirring arm and a return stirring arm according to the functions to be exerted. The transmission device 13 is installed outside the stirring cylinder 12 and is in transmission connection with the stirring device 14 (two stirring shafts 141), so as to drive the stirring device 14 (two stirring shafts 141) to rotate to realize stirring. The discharge door device 16 is installed at the bottom of the mixing cylinder 12 to control the discharge of the discharge port 122 and the discharge opening adjustment.

The basic structure of blender B200 is the same as blender A100, and includes base 21, blending cylinder 22, transmission 23, blending device 24 and discharge door device 26. The top and bottom of the cylinder 22 near both ends thereof are provided with a feed port 221 and a discharge port 222, respectively. The stirring device 24 is installed in the stirring cylinder 22, and has two stirring shafts 241 arranged in parallel, and stirring arms are provided on the stirring shafts 241, and the stirring arms are divided into a feeding stirring arm and a returning stirring arm according to the functions of the feeding stirring arm and the returning stirring arm. The transmission device 13 is installed outside the stirring cylinder 22 and is in transmission connection with the stirring device 24 (two stirring shafts 241), so as to drive the stirring device 24 (two stirring shafts 241) to rotate to realize stirring. The discharge gate device 26 is installed at the bottom of the mixer cylinder 22 to control the discharge of the discharge port 222 and the discharge opening adjustment.

The core invention point of the scheme is mainly embodied in the following 3 points of overall design:

the design of continuous stirring of the stirrer A100 and the stirrer B200 in two stages from top to bottom is that a discharge port 122 of the stirrer A100 is communicated with a feed port 221 of the stirrer B200 from top to bottom, so that the mixture sent out by the stirrer A100 can be directly and continuously fed into the stirrer B200.

The mixer a100 and the mixer B200 are also provided with tilt angle adjusting mechanisms, specifically, the tilt angle adjusting mechanism 15 of the mixer a100 is installed between the base 11 and the mixing cylinder 12, and is used for adjusting a mixing cylinder tilt angle of the mixing cylinder 12, the mixing cylinder tilt angle takes the end (rear end) where the discharge port 122 is located as a high tilt end, specifically, a horizontal included angle a between a central line of the mixing cylinder and the horizontal. Similarly, the tilt angle adjusting mechanism 25 of the mixer a200 is installed between the base 21 and the mixer cylinder 22, and is used for adjusting the mixer cylinder tilt angle (mixer cylinder horizontal included angle a) of the mixer cylinder 22. Under the condition that the hardware condition of the stirrer is certain, the discharging speed of the stirring cylinder is adjusted through the change of the horizontal included angle of the stirring cylinder, so that the basic purpose of controlling the yield and the uniformity of the asphalt mixture is achieved.

And the special control system 300 designed for the stirring equipment comprises a PLC module 30, and a tilting angle control module A31, a rotating speed control module A32 and an opening control module A33 which are all in bidirectional electric connection with the PLC module 30. The inclination angle control module A31 is correspondingly matched with the inclination angle adjusting mechanism 15 and is used for independently controlling the inclination angle (the horizontal included angle a (A)) of the stirring cylinder of the stirrer A100; the rotating speed control module A32 is correspondingly matched with the transmission device 13 and is used for independently controlling the stirring rotating speed V (A) of the stirring cylinder of the stirrer A100; the opening control module A33 is correspondingly matched with the discharge door device 16 and is used for independently controlling the discharge opening L (A) of the mixing tank of the mixer A100.

Similarly, the control system 300 further includes a tilt angle control module B31, a rotation speed control module B32, and an opening degree control module B33, all of which are bidirectionally electrically connected to the PLC module 30. The PLC module 30 is a central master controller, and the inclination angle control module B31 is correspondingly matched with the inclination angle adjusting mechanism 25 and is used for independently controlling the inclination angle (horizontal included angle a (B)) of the stirring cylinder of the stirring machine B100; the rotating speed control module B32 is correspondingly matched with the transmission device 23 and is used for independently controlling the stirring rotating speed V (B) of the stirring cylinder of the stirrer B100; the opening degree control module B33 is correspondingly matched with the discharge door device 26 and is used for independently controlling the discharge opening degree L (B) of the mixing tank of the mixer B100.

The main innovation of the stirring equipment is realized by the 3 invention points as a whole, the three parts are obtained under the combined action of the two stages of continuous stirring, the two stages of stirring are respectively and independently set unique stirring cylinder parameters, the special parameters of the stirring cylinder comprise the rotating speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of a discharge door, the three parts are in cooperative match but are not available, particularly, the discharge speed of the stirring cylinder is emphatically regulated by the independent regulation design of the horizontal included angle a of the two continuous stages of stirring cylinders, and therefore the basic purpose of controlling the yield and the uniformity of the asphalt mixture is achieved. Therefore, the stirring time of the asphalt mixture can be effectively prolonged and the mixing uniformity can be improved by flexibly combining and regulating the three specific parameters of the two-stage continuous stirring cylinder and the two-stage stirring cylinder. And through the flexible adjustment of the parameter combination, the method is suitable for stirring various asphalt mixtures, and can achieve the effect of good mixing uniformity.

Preferably, the present disclosure also proposes a preferable scheme for each stirring device of the stirrer a100 and the stirrer B200, and as shown in fig. 5, the arrangement form of the stirring arms on the two stirring shafts 141 of the stirring device 14 of the stirrer a100 sequentially from the feeding end to the discharging end is as follows: and the three feeding and returning devices are arranged in a group, the feeding and returning devices are arranged in a plurality of groups, the back returning device is arranged in a group, and the back returning arm corresponding to the back returning device is positioned behind the discharge hole. In other words, the arrangement form of the stirring arm of the stirrer A is divided into three stages, from the feeding hole 121, in the first stage, three feeding arms 142 are provided with a returning arm 142 continuously for rapidly shifting the asphalt mixture to the middle part of the stirring cylinder, so that the asphalt mixture is prevented from being accumulated at the front end part of the stirring cylinder; in the second stage, the middle part of the stirring cylinder adopts a plurality of repeated group structural forms of a feeding arm 142 and a returning arm 143, and the asphalt mixture is driven to be fully stirred and fused in a limited space through the rotating motion of the stirring arm; in the third stage, a rear returning arm 144 is disposed behind the discharge port 122 for rapidly shifting the asphalt mixture to the discharge door while avoiding being retained behind the discharge port 122.

As shown in fig. 6, the arrangement of the stirring arms on the two stirring shafts 241 of the stirring device 24 of the stirrer B200 from the feeding end to the discharging end is as follows: n feeds one and returns, and the back returns and establishes a set of, and the back that should return back the correspondence returns the arm and is located the rear of discharge gate. In other words, the arrangement form of the stirring arms of the stirrer B200 is divided into two stages, the asphalt mixture which is mixed and stirred by the upper stage is fed from the feeding hole 121, the N feeding arms 242 facing the same direction are adopted in the first stage, the asphalt mixture can rapidly flow to the tail part of the stirring cylinder, and the mixing and stirring are carried out in the stirring and flowing process; in the second stage, a rear return arm 244 is arranged behind the discharge port 222 and used for rapidly shifting the asphalt mixture to a discharge door and avoiding being detained behind the discharge port 222.

Given the preferred embodiment, there are 13 mixing arms on the mixing shaft 141 of the mixing device 14, and there are 4 sets corresponding to the one-feed one-return, that is, the arrangement form is feed/return; the stirring shaft 241 of the stirring device 24 is also provided with 13 stirring arms, and N feed-return is 11 feed-return, i.e. the arrangement is in the form of feed/return/post-return.

The arrangement form of the stirring processes of the respective stirring devices of the stirrer A100 and the stirrer B200 is considered as a whole, and the arrangement form is taken as a fourth invention point and is further supplement and feedback for the three invention points, so that the technical performance advantages of the stirring device are more prominent. The arrangement form of the continuous two-stage stirring process is specially designed on the basis of upper and lower two-stage continuous stirring, and is also specially designed by combining flexible regulation and control of the discharging speed brought by respective adjustable inclination angles of the two-stage stirring cylinders, so that the mixing uniformity and the type applicability are further improved. On the contrary, on the basis of the 3 invention points, especially on the premise of the technical design that the inclination angles of the two-stage stirring cylinders are respectively adjustable, the material mixing and homogenizing effect exerted by the specific arrangement form of the two-stage stirring process has very outstanding performance and is beneficial to realizing the adaptability of various types of asphalt.

Preferably, the tilt angle adjusting mechanism 15/25 is a lifting mechanism, specifically, the tilt angle adjusting mechanism 15 is taken as an example, and the tilt angle adjusting mechanism 25 is the same. The front end (corresponding to the end where the feed inlet 121 is located) of the mixing cylinder 12 is movably hinged on the base 11, and the lifting mechanism is movably hinged between the mixing cylinder 12 and the base 11 to perform lifting adjustment action on the rear end (corresponding to the end where the discharge outlet 122 is located) of the mixing cylinder 12. The lifting mechanism can specifically adopt a lifting oil cylinder, and the rear end of the stirring cylinder body 12 can be driven to lift through the telescopic action of the lifting oil cylinder, so that the horizontal included angle a of the stirring cylinder is finally adjusted. In the specific embodiment, two groups of lifting oil cylinders are symmetrically arranged at two sides of the stirring cylinder body. The inclination angle value (the horizontal included angle a of the stirring cylinder) is preferably controlled within the range of between 0 and 25 degrees.

In a preferable scheme, the adjustment and control of the inclination angle value are realized by adopting position sensor sensing, namely, the lifting mechanism is also provided with a position sensor which is used for sensing the inclination angle value of the stirring cylinder 12/22 in real time and feeding back a signal to the PLC module in real time.

Preferably, the PLC module 30 pre-records parameters of a mixing tank storing various types of asphalt mixtures, for example, pre-setting and storing the asphalt mixtures into AC25, AC20, AC16, AC13, AC10, AC5, and the like according to known asphalt mixture categories. Each asphalt mixture type can be provided with a plurality of parameters of the mixing tank, and the parameters of the mixing tank comprise three important parameters of the rotating speed V of the mixing tank, the horizontal included angle a of the mixing tank and the opening degree L of the discharge door. Wherein the parameters of the two-stage stirring cylinders corresponding to each group of asphalt mixture types can also be combined or separately and independently set. Therefore, the method is extremely favorable for flexible calling and changeable selection, has extremely strong practicability, meets the actual production requirement, and brings excellent economic benefit. When the equipment is started to produce, the parameter configuration can be selected at will, and full-automatic production control is well performed. The above parameters can be randomly adjusted according to the actual yield requirement and uniformity requirement, and adjusted and stored in real time.

Preferably, the inclination angles of the mixing cylinders of the mixer a100 and the mixer B200 are adjustable, and in order to facilitate respective flexibility and adjustability, the discharge port 122 and the feed port 221 are arranged in an up-and-down communication mode, and the two communication modes adopt telescopic adjustable communication components, such as telescopic communication pipe components.

Based on the same invention idea, the scheme also relates to a continuous asphalt mixture stirring control method, which comprises the following steps:

1) adjusting parameters of respective mixing cylinders for continuous mixing of an upper stage and a lower stage according to the type of the asphalt mixture to be mixed and stirred, wherein the mixing cylinder A: the rotating speed V (A) of the stirring cylinder, the horizontal included angle a (A) of the stirring cylinder and the opening degree L (A) of the discharge door; a stirring cylinder B: the rotating speed V (B) of the stirring cylinder, the horizontal included angle a (B) of the stirring cylinder and the opening degree L (B) of the discharge door;

for example, asphalt mixture type AC25 material, the set parameters are as follows: the rotating speed V of the stirring cylinder is 40 rpm; the horizontal included angle a of the stirring cylinder is 10 degrees; opening L of the discharge door is 70%; the parameters in the continuous stirring cylinder B are as follows: the rotating speed V of the stirring cylinder is 30 rpm; the horizontal included angle a of the stirring cylinder is 15 degrees; the opening L of the discharging door is 80 percent.

2) And controlling to start the stirring cylinder A and the stirring cylinder B to automatically work according to respective parameters of the stirring cylinders, feeding the asphalt mixture to be mixed and stirred from the stirring cylinder A, directly and continuously feeding the asphalt mixture to the stirring cylinder B after the asphalt mixture is mixed and stirred by the stirring cylinder A, and carrying out continuous stirring production of continuous feeding and continuous discharging.

According to the stirring control method, the upper and lower two-stage continuous stirring is adopted, unique stirring cylinder parameters are set independently for the two-stage stirring, the special stirring cylinder parameters comprise the rotation speed V of the stirring cylinder, the horizontal included angle a of the stirring cylinder and the opening degree L of the discharge door, the three parameters are cooperatively matched, and the three parameters cannot be matched. And through the flexible adjustment of the parameter combination, the method is suitable for stirring various asphalt mixtures, and can achieve the effect of good mixing uniformity.

Preferably, in the step 1), parameters of two-stage mixing cylinders corresponding to various types of asphalt mixtures are recorded into a PLC module for pre-storage; and then, directly selecting pre-stored parameters of the two-stage mixing cylinders corresponding to the asphalt mixture types according to the asphalt mixture types to be mixed and stirred. In the preferred embodiment, each asphalt mixture type can be provided with a plurality of parameter settings of the mixing cylinders, and the parameters of the corresponding two stages of mixing cylinders are combined or separately and independently set, so that flexible calling is facilitated.

Preferably, the horizontal included angle a (A)/a (B) of the stirring cylinder is the inclination angle value of the stirring cylinder, and the included angle a is controlled to be more than or equal to 0 degrees and less than or equal to 25 degrees.

Preferably, the stirring form of the stirring cylinder A is as follows: the feeding end adopts three feeding and one returning, the feeding and the returning are adopted from the middle part to the discharging port, and the back end of the discharging port adopts the back returning. The stirring form of the stirring cylinder B is as follows: n is adopted to feed from the feed inlet to the discharge outlet, and the back end of the discharge outlet returns after being adopted. Given the preferred embodiment, in the mixing tank a, 4 groups are provided corresponding to said one feed and one return, arranged in the form of feed/return-after-return; in the mixing tank B, the N feed-return is 11 feed-return, and the arrangement is in the form of feed/return-after-feed.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.