阅读说明：本技术 灰分检测系统及其控制方法 (Ash content detection system and control method thereof ) 是由 梁兴国 冯化一 张秀峰 于 2020-09-08 设计创作，主要内容包括：本发明涉及灰分检测领域,具体而言,涉及一种灰分检测系统及其控制方法。灰分检测系统包括混料装置、灰分检测仪、输送带和控制器,混料装置与灰分检测仪沿输送带的输送方向排布；混料装置包括落料通道、搅拌轮和第一驱动装置,落料通道的底部出料口与输送带相对设置；搅拌轮安装在落料通道内,搅拌轮具有轮轴和环绕轮轴设置的若干叶片,轮轴和叶片均与物料的下落方向存在夹角,轮轴与落料通道转动连接；第一驱动装置的输出轴与搅拌轮传动连接；灰分检测仪和第一驱动装置均与控制器电连接。控制方法应用于上述灰分检测系统。本发明提供的灰分检测系统及其控制方法,提高了灰分检测仪检测到的物料的灰分值的准确度。(The invention relates to the field of ash detection, in particular to an ash detection system and a control method thereof. The ash content detection system comprises a mixing device, an ash content detector, a conveying belt and a controller, wherein the mixing device and the ash content detector are arranged along the conveying direction of the conveying belt; the mixing device comprises a blanking channel, a stirring wheel and a first driving device, and a discharge port at the bottom of the blanking channel is arranged opposite to the conveying belt; the stirring wheel is arranged in the blanking channel and is provided with a wheel shaft and a plurality of blades arranged around the wheel shaft, the wheel shaft and the blades form included angles with the falling direction of the materials, and the wheel shaft is rotationally connected with the blanking channel; an output shaft of the first driving device is in transmission connection with the stirring wheel; the ash content detector and the first driving device are electrically connected with the controller. The control method is applied to the ash content detection system. The ash content detection system and the control method thereof provided by the invention improve the accuracy of the ash content value of the material detected by the ash content detector.)

1. The ash content detection system is characterized by comprising a mixing device (100), an ash content detector (300), a conveying belt (400) and a controller, wherein the mixing device (100) and the ash content detector (300) are sequentially arranged along the conveying direction of the conveying belt (400);

the mixing device (100) comprises a blanking channel (110), a stirring wheel (120) and a first driving device, a top feeding hole of the blanking channel (110) is used for receiving materials (500), and a bottom discharging hole of the blanking channel (110) is arranged opposite to the conveying belt (400); the stirring wheel (120) is arranged in the blanking channel (110), the stirring wheel (120) is provided with a wheel shaft (121) and a plurality of blades (122) arranged around the wheel shaft (121), the wheel shaft (121) and the blades (122) form included angles with the falling direction of the material (500), and the wheel shaft (121) is rotatably connected with the blanking channel (110);

an output shaft of the first driving device is in transmission connection with the stirring wheel (120) and is used for driving the stirring wheel (120) to rotate; the ash content detector (300) and the first driving device are electrically connected with the controller, the controller can acquire an ash content value of a material (500) detected by the ash content detector (300), and the rotating speed of an output shaft of the first driving device is controlled according to the fluctuation range of the ash content value.

2. The ash detection system of claim 1, wherein the blanking channel (110) is vertically disposed, the axle (121) is horizontally disposed, and the blades (122) are in the same plane as the axis of the axle (121);

and/or the blades (122) are multiple, and the multiple blades (122) are arranged at intervals along the circumferential direction of the stirring wheel (120).

3. The ash detection system of claim 2, wherein a partition (123) is connected to each end of the blade (122) in the axial direction of the hub (121), the partition (123) being disposed around the hub (121).

4. The ash detection system of claim 3, wherein the partition (123) is plural, and a set of the vanes (122) is provided between any two adjacent partitions (123);

the blades (122) in the same group are uniformly arranged along the circumferential direction of the wheel shaft (121), and/or the blades (122) in two adjacent groups are arranged in a staggered mode.

5. An ash detection system according to claim 4 wherein the blades (122) are in three groups, any two adjacent blades (122) in the same group have an included angle of 60 °, and the three groups of blades (122) are sequentially staggered by 20 ° in the axial direction of the hub (121).

6. The ash content detecting system according to any one of claims 1 to 5, characterized in that a material gathering device (200) is arranged between the mixing device (100) and the ash content detector (300), the material gathering device (200) comprises a support frame (210) and two material gathering plates (220), the support frame (210) and the ash content detector (300) are fixedly arranged relative to each other, and the two material gathering plates (220) are both mounted on the support frame (210);

the two material gathering plates (220) are arranged above the conveying belt (400) at intervals in the width direction of the conveying belt (400), materials (500) on the conveying belt (400) flow to the ash detector (300) through a channel between the two material gathering plates (220), and the two material gathering plates (220) can approach or depart from each other.

7. The ash detecting system according to claim 6, wherein the two aggregate plates (220) each have an aggregate portion, and plate surfaces of the two aggregate portions are gradually inclined toward a direction approaching each other in a conveying direction of the conveyor belt (400);

and/or the material gathering plate (220) is in sliding fit with the supporting frame (210).

8. The ash detection system according to claim 6, characterized in that a first distance meter and a second distance meter are installed above the conveyor belt (400), the first distance meter is located between the mixing device (100) and the material gathering device (200) and is used for measuring the thickness of the material (500) between the mixing device (100) and the material gathering device (200); the second distance meter is positioned between the ash content detector (300) and the material gathering device (200) and is used for measuring the thickness of the material (500) between the material gathering device (200) and the ash content detector (300);

the material gathering device (200) comprises a second driving device, and two output ends of the second driving device are respectively in transmission connection with the two material gathering plates (220) and are used for driving the two material gathering plates (220) to move;

the first distance meter, the second distance meter and the second driving device are electrically connected with the controller, and the controller is used for controlling the starting, stopping and running directions of the second driving device according to the measured values of the first distance meter and the second distance meter.

9. A method of controlling an ash detection system according to any one of claims 1 to 8, wherein a reference fluctuation amount a and a predetermined speed increase value Δ v are provided in the controller, the method comprising:

the ash content detector (300) detects the ash content A of the material (500) moving to the detection position in real time, transmits the detected ash content A to the controller, and the controller starts timing;

when a predetermined time period Δ t₁When the maximum fluctuation amount of the internal ash content value A is larger than the reference fluctuation amount a, the controller controls the rotating speed v of the output shaft of the first driving device to be increased by a preset speed increasing value Deltav, and the timing is started again.

10. The control method according to claim 9, characterized by further comprising:

the controller counts each rotation speed of the output shaft of the first drive device and sets the starting rotation speed of the output shaft of the first drive device to be advanced by a predetermined time period Deltat from the current time₂The rotational speed at which the output shaft of the first drive means is present the most frequently.

11. The control method according to claim 9, characterized in that the ash detection system further comprises a first distance meter, a second driving device and two spaced-apart material gathering plates (220), wherein a first reference thickness value H0 and a second reference thickness value H0 are preset in the controller;

the control method further comprises the following steps:

the method comprises the following steps that a first distance meter measures a first thickness value H of a material (500) between a mixing device (100) and a material gathering device (200) in real time, and meanwhile, a second distance meter measures a second thickness value H of the material (500) between the material gathering device (200) and an ash content detector (300) in real time;

the controller obtains a first thickness value H and a second thickness value H;

when H is larger than or equal to H0, the controller controls the second driving device to drive the two material gathering plates (220) to deviate from each other until the width d of the channel between the two material gathering plates (220) reaches the maximum width d0, timing is started simultaneously, and a preset time period Deltat is timed₃Then, the first thickness value H and the second thickness value H are obtained again;

when H is less than H0 and H is more than or equal to H0, the controller controls the second driving device to stop driving;

when H is less than H0 and H is less than H0, the controller controls the second driving device to drive the two material gathering plates (220) to approach each other so as to shorten the channel width d between the two material gathering plates (220) by a preset contraction value delta d, then obtains the first thickness value H and the second thickness value H again, if H is still less than H0 and H is less than H0, the second driving device is continuously controlled to drive the material gathering plates (220) to approach each other so as to shorten the channel width d between the two material gathering plates (220) by a preset contraction value delta d again, and so on until H is more than or equal to H0 or H is more than or equal to H0.

12. The control method according to claim 11, wherein the predetermined safety duration Δ t is continued when H ≧ H0 and H ≧ H0₄When the material (500) is too thick, the controller prompts that the material (500) is too thick;

and/or when H is less than H0 and H is less than H0, the preset safety duration delta t is continued₅The controller then prompts that the thickness of the material (500) is insufficient.

Technical Field

The invention relates to the field of ash detection, in particular to an ash detection system and a control method thereof.

Background

The ash content detecting system is provided with an ash content detector and a conveying belt, and the conveying belt can convey finished coal to a detection position of the ash content detector.

However, the finished coal product is mixed with products of various washing processes, and the various products are in an independent distribution state on the conveying belt, so that the ash values of materials at different parts of the conveying belt are different greatly, and therefore, the accuracy of the ash value of the material detected by the ash detector is low.

In summary, how to overcome the above-mentioned defects of the existing ash detection system is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide an ash content detection system and a control method thereof, which are used for solving the technical problem that the ash content of a detected material is low in accuracy in the ash content detection system in the prior art.

The ash content detection system provided by the invention comprises a mixing device, an ash content detector, a conveying belt and a controller, wherein the mixing device and the ash content detector are sequentially arranged along the conveying direction of the conveying belt.

The mixing device comprises a blanking channel, a stirring wheel and a first driving device, wherein a top feeding hole of the blanking channel is used for receiving materials, and a bottom discharging hole of the blanking channel is arranged opposite to the conveying belt; the stirring wheel is arranged in the blanking channel and provided with a wheel shaft and a plurality of blades arranged around the wheel shaft, included angles are formed between the wheel shaft and the blades and the falling direction of the materials, and the wheel shaft is rotatably connected with the blanking channel.

An output shaft of the first driving device is in transmission connection with the stirring wheel and is used for driving the stirring wheel to rotate; the ash content detector and the first driving device are electrically connected with the controller, the controller can acquire an ash content value of a material detected by the ash content detector, and the rotating speed of an output shaft of the first driving device is controlled according to the fluctuation range of the ash content value.

Preferably, as an implementation mode, the blanking channel is arranged vertically, the axle is arranged horizontally, and the blades and the axle are in the same plane;

and/or the blades are multiple and are arranged at intervals along the circumferential direction of the stirring wheel.

Preferably, as an implementation mode, two ends of the blade along the axial direction of the wheel shaft are connected with partition plates, and the partition plates are arranged around the wheel shaft.

Preferably, as an embodiment, the partition plate is provided with a plurality of partition plates, and a group of the blades is arranged between any two adjacent partition plates; the blades in the same group are uniformly distributed along the circumferential direction of the wheel shaft, and/or the adjacent two groups of blades are distributed in a staggered mode.

Preferably, as an implementation mode, the blades are in three groups, the included angle of any two adjacent blades in the same group is 60 degrees, and the blades in the three groups are sequentially staggered by 20 degrees along the axial direction of the wheel shaft.

Preferably, as an implementation mode, a material gathering device is arranged between the material mixing device and the ash content detector, the material gathering device includes a support frame and two material gathering plates, the support frame and the ash content detector are relatively fixed, and the two material gathering plates are both mounted on the support frame.

The two material gathering plates are arranged above the conveying belt at intervals in the width direction of the conveying belt, materials on the conveying belt flow to the ash content detector through a channel between the two material gathering plates, and the two material gathering plates can be close to or deviate from each other.

Preferably, as an implementation mode, the two material gathering plates are provided with material gathering parts, and plate surfaces of the two material gathering parts are gradually inclined towards the mutually approaching direction along the conveying direction of the conveying belt;

and/or the material gathering plate is in sliding fit with the support frame.

Preferably, as an implementation mode, a first distance meter and a second distance meter are installed above the conveying belt, and the first distance meter is located between the mixing device and the material gathering device and is used for measuring the thickness of the material between the mixing device and the material gathering device; the second distance meter is located between the ash content detector and the material gathering device, and is used for measuring the thickness of the material between the material gathering device and the ash content detector.

The material gathering device comprises a second driving device, and two output ends of the second driving device are in transmission connection with the two material gathering plates respectively and are used for driving the two material gathering plates to move.

The first distance meter, the second distance meter and the second driving device are electrically connected with the controller, and the controller is used for controlling the starting, stopping and running directions of the second driving device according to the measured values of the first distance meter and the second distance meter.

Preferably, as an implementable mode, the second driving device includes a second motor, a lead screw and two nuts, the second motor is fixed on the support frame, an output shaft of the second motor is in transmission connection with the lead screw, the two nuts are both matched with the lead screw, and the two nuts are respectively and fixedly connected with the two material collecting plates.

The invention also provides a control method of the ash content detection system, wherein a reference fluctuation amount a and a preset speed increasing value Deltav are arranged in the controller, and the control method comprises the following steps:

the ash content detector detects the ash content A of the material moving to the detection position in real time, and transmits the detected ash content A to the controller, and the controller starts timing;

when a predetermined time period Δ t₁When the maximum fluctuation amount of the internal ash content value A is larger than the reference fluctuation amount a, the controller controls the rotating speed v of the output shaft of the first driving device to be increased by a preset speed increasing value Deltav, and the timing is started again.

Preferably, as an implementable mode, the control method further includes:

the controller counts each rotation speed of the output shaft of the first drive device and sets the starting rotation speed of the output shaft of the first drive device to be advanced by a predetermined time period Deltat from the current time₂The rotational speed at which the output shaft of the first drive means is present the most frequently.

Preferably, as an implementation mode, the ash detection system further comprises a first distance meter, a second driving device and two spaced material gathering plates, and the controller is internally preset with a first reference thickness value H0 and a second reference thickness value H0.

The control method further comprises the following steps:

the first distance meter measures a first thickness value H of the material between the material mixing device and the material gathering device in real time, and meanwhile, the second distance meter measures a second thickness value H of the material between the material gathering device and the ash content detector in real time;

the controller obtains a first thickness value H and a second thickness value H;

when H is larger than or equal to H0, the controller controls the second driving device to drive the two material gathering plates to deviate from each other until the width d of the channel between the two material gathering plates reaches the maximum width d0, timing is started simultaneously, and a preset time period delta t is set during timing₃Then, the first thickness value H and the second thickness value H are obtained again;

when H is less than H0 and H is more than or equal to H0, the controller controls the second driving device to stop driving;

when H is less than H0 and H is less than H0, the controller controls the second driving device to drive the two material gathering plates to approach each other so as to shorten the channel width d between the two material gathering plates by a preset contraction value delta d, then the first thickness value H and the second thickness value H are obtained again, if H is still less than H0 and H is less than H0, the second driving device is continuously controlled to drive the material gathering plates to approach each other so as to shorten the channel width d between the two material gathering plates by a preset contraction value delta d again, and so on until H is more than or equal to H0 or H is more than or equal to H0.

Preferably, as an implementation mode, when H is more than or equal to H0 and H is more than or equal to H0, the preset safety duration Deltat is continued₄When the thickness of the material is too high, the controller prompts that the thickness of the material is too high;

and/or when H is less than H0 and H is less than H0, the preset safety duration delta t is continued₅And when the thickness of the material is not enough, the controller prompts that the thickness of the material is not enough.

The ash content detection system and the control method thereof provided by the invention have the beneficial effects that:

the top feed inlet of the blanking channel of the mixing device can receive materials to be detected, the materials can fall down along the blanking channel under the action of self gravity after entering the blanking channel, and the materials can contact with a stirring wheel in the blanking channel in the falling process; because the wheel shaft and the blades of the stirring wheel arranged in the blanking channel form included angles with the falling direction of the materials, when the first driving device drives the stirring wheel to rotate in the blanking channel, and the blades of the stirring wheel at least rotate to a certain area, the falling material is contacted with the blade with the partial speed facing the incoming material direction of the material and then blocked by the blade, under the impact of the blades, the materials are scattered and thrown out towards the reverse direction of the falling of the materials, part of the materials thrown out by the blades can be mixed with the falling materials in a staggered way, and the other part of the materials can be collided and rebounded with the side wall of the blanking channel, so that the materials can be mixed more uniformly, thereby, can alleviate the difference of the ash content value of the material that is in the different positions of conveyer belt, improved the degree of accuracy of the ash content value of the material that the ash content detector detected.

In the process of conveyer belt transported substance material, the ash content detector can real-time detection remove to the ash content value A of the material of detection position department to can transmit the ash content value A who detects for the controller, so that the controller can be according to the fluctuation range of the ash content value who acquires, the rotational speed of the output shaft of control first drive arrangement. The controller detects that the time interval delta t is preset₁When the maximum fluctuation amount of the ash content A in a specific time period (for example, 1 minute) is larger than the reference fluctuation amount a, the rotating speed of the output shaft of the first driving device is controlled to be increased by a preset speed increasing value delta v so as to increase the rotating speed of the stirring wheel, and further, the mixing effect of the materials is improved so as to reduce the fluctuation amount of the ash content A of the materials and improve the precision of the detected ash content.

After the rotating speed of the output shaft of the first driving device is increased by a preset speed increasing value Deltav, the controller counts again, if the maximum fluctuation quantity of the grey value A in the next preset time interval is still larger than the reference fluctuation quantity a, the controller controls the rotating speed of the output shaft of the first driving device to be increased by the preset speed increasing value Deltav again, and so on until the preset time period Deltat is reached₁The maximum fluctuation amount of the inner gray value a is not greater than the reference fluctuation amount a.

Therefore, under the control of controller, the rotational speed of stirring wheel can maintain in suitable within range, and when the stirring wheel rotated with the rotational speed that is in this within range, the mixing uniformity of material was higher, and the difference of the ash value of the material that is in the different positions of conveyer belt is further less, has improved the degree of accuracy of the ash value of the material that the ash detector detected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a ash detection system provided by an embodiment of the present invention;

fig. 2 is a perspective view of a material mixing device in an ash detection system according to an embodiment of the present invention;

fig. 3 is a front view of a material mixing device in an ash detection system provided by an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of a mixing device in the ash detection system provided by the embodiment of the invention in FIG. 3;

FIG. 5 is a schematic perspective view of a stirring wheel in the ash detection system provided in the embodiment of the present invention;

FIG. 6 is a bottom view of a coalescing assembly in an ash detection system provided by an embodiment of the present invention;

fig. 7 is a front view of a material accumulation device in an ash detection system provided by an embodiment of the present invention.

Icon:

100-a mixing device; 110-a blanking channel; 120-stirring wheel; 121-axle; 122-blades; 123-a separator; 130-a first motor; 140-a frequency converter;

200-a material gathering device; 210-a support frame; 220-material gathering plate; 230-a second motor; 240-lead screw; 250-a nut;

300-ash content detector;

400-a conveyor belt;

500-materials.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Referring to fig. 1 to 5, the embodiment provides an ash content detecting system, which includes a mixing device 100, an ash content detector 300, a conveyor belt 400 and a controller, wherein the mixing device 100 and the ash content detector 300 are sequentially arranged along a conveying direction of the conveyor belt 400; the mixing device 100 comprises a blanking channel 110, a stirring wheel 120 and a first driving device, wherein a top feeding hole of the blanking channel 110 is used for receiving materials 500, and a bottom discharging hole of the blanking channel 110 is oppositely provided with a conveying belt 400; the stirring wheel 120 is installed in the blanking channel 110, the stirring wheel 120 is provided with a wheel shaft 121 and a plurality of blades 122 arranged around the wheel shaft 121, the wheel shaft 121 and the blades 122 both form included angles with the falling direction of the material 500, and the wheel shaft 121 is rotatably connected with the blanking channel 110.

An output shaft of the first driving device is in transmission connection with the stirring wheel 120 and is used for driving the stirring wheel 120 to rotate; the ash content detector 300 and the first driving device are electrically connected with the controller, the controller can acquire an ash content value of the material 500 detected by the ash content detector 300, and the rotating speed of an output shaft of the first driving device is controlled according to the fluctuation range of the ash content value.

A top feed inlet of the blanking channel 110 of the mixing device 100 can receive a material 500 to be detected, after the material 500 enters the blanking channel 110, the material 500 falls down along the blanking channel 110 under the action of self gravity, and in the falling process, the material 500 is in contact with the stirring wheel 120 in the blanking channel 110; because the axle 121 and the blades 122 of the stirring wheel 120 installed in the blanking channel 110 form an included angle with the falling direction of the material 500, during the rotation of the stirring wheel 120 in the blanking channel 110, when the blades 122 of the stirring wheel 120 rotate at least to a certain region, will have a partial velocity facing the incoming material direction of the material 500, and the falling material 500 will be stopped by the blade 122 after contacting the blade 122 having a partial velocity facing the incoming material direction of the material 500, under the impact of the blade 122, the material 500 is scattered and thrown out in the reverse direction of the falling of the material 500, part of the material 500 thrown out by the blade 122 is mixed with the falling material 500 in a staggered manner, and part of the material 500 collides with the side wall of the blanking channel 110 and rebounds, so that the material 500 is mixed more uniformly, therefore, the difference of the ash values of the materials 500 at different positions of the conveying belt 400 can be relieved, and the accuracy of the ash values of the materials 500 detected by the ash detector 300 is improved.

During the process of the conveyor belt 400 conveying the material 500,the ash content detector 300 can detect the ash content value A of the material 500 moving to the detection position in real time, and can transmit the detected ash content value A to the controller, so that the controller can control the rotating speed of the output shaft of the first driving device according to the fluctuation range of the obtained ash content value. The controller detects that the time interval delta t is preset₁When the maximum fluctuation amount of the ash value A in a specific time period (for example, 1 minute) is greater than the reference fluctuation amount a, the rotating speed of the output shaft of the first driving device is controlled to be increased by a predetermined speed increasing value Deltav so as to increase the rotating speed of the stirring wheel 120, and further, the mixing effect of the materials 500 is improved so as to reduce the fluctuation amount of the ash value A of the materials 500 and improve the precision of the detected ash value.

After the rotating speed of the output shaft of the first driving device is increased by a preset speed increasing value Deltav, the controller counts again, if the maximum fluctuation quantity of the grey value A in the next preset time interval is still larger than the reference fluctuation quantity a, the controller controls the rotating speed of the output shaft of the first driving device to be increased by the preset speed increasing value Deltav again, and so on until the preset time period Deltat is reached₁The maximum fluctuation amount of the inner gray value a is not greater than the reference fluctuation amount a.

Therefore, under the control of the controller, the rotating speed of the stirring wheel 120 can be maintained in a proper range, and when the stirring wheel 120 rotates at the rotating speed within the range, the mixing uniformity of the materials 500 is higher, the difference of the ash values of the materials 500 at different parts of the conveying belt 400 is smaller, and the accuracy of the ash value of the materials 500 detected by the ash detector is further improved.

Preferably, referring to fig. 3 to 5, the blanking channel 110 is vertically arranged, the axle 121 of the stirring wheel 120 is horizontally arranged, and the axes of the blades 122 of the stirring wheel 120 and the axle 121 are arranged on the same plane, so that the area of the blades 122 of the stirring wheel 120 can be fully utilized, and on the premise that the area of the blades 122 is not changed, the acting area of the blades 122 on the material 500 can be increased, so that more material 500 can be thrown out by the blades 122, and the mixing effect is improved.

Referring to fig. 5, the blades 122 may be provided in plurality, and the blades 122 may be spaced apart from each other in the circumferential direction of the stirring wheel 120, so that the blades 122 may alternately appear in a region having a partial velocity facing the incoming material direction of the material 500, thereby increasing the frequency of throwing the material 500, reducing the amount of the material 500 that cannot be thrown by the blades 122, and improving the mixing effect of the material 500.

The two ends of the blade 122 in the axial direction of the axle 121 are both connected with the partition boards 123, and the partition boards 123 are arranged around the axle 121, so that after the material 500 falls onto the blade 122 with the component speed facing the incoming material direction of the material 500, the partition boards 123 at the two ends can block the material 500, the material 500 sliding down from the two ends of the blade 122 is reduced, the amount of the thrown material 500 is increased, and the mixing effect is improved.

It should be noted that the blade 122 can be directly connected to the hub 121, or indirectly connected to the hub 121 through the partition 123.

Specifically, the partition 123 may be provided in plural, and a group of blades 122 is provided between any two adjacent partitions 123, that is, several partitions 123 in the middle can divide the plurality of blades 122 into at least two groups.

The blades 122 in the same group can be uniformly arranged along the circumferential direction of the wheel shaft 121, so that one blade 122 rotates to an area with a component speed facing the incoming material direction of the material 500 at equal intervals, different blades 122 in the same group can receive the material 500 reaching the position of the stirring wheel 120 at different time points, the probability that the material 500 is thrown out can be improved, and the mixing effect is improved.

Two adjacent groups of blades 122 can be arranged in a staggered manner, that is, the blades 122 in different groups can receive the materials 500 reaching the position of the stirring wheel 120 at different time points, so that the probability of throwing the materials 500 is improved, and the effects of receiving the materials 500 and throwing the materials 500 cannot be influenced due to too small space between the two oppositely arranged blades 122.

Specifically, the blades 122 may be divided into three groups, that is, the partitions 123 are provided in five; the included angle of any two adjacent blades 122 in the same group is set to be 60 degrees, and the three groups of blades 122 are sequentially staggered by 20 degrees along the axial direction of the wheel shaft 121, so that the included angles of any two adjacent blades 122 in the circumferential direction of the wheel shaft 121 are both 20 degrees, and the uniformity is better.

In addition, referring to fig. 1, 6 and 7, a material gathering device 200 may be additionally disposed between the material mixing device 100 and the ash content detector 300, a support frame 210 and two material gathering plates 220 are disposed in a specific structure of the material gathering device 200, the support frame 210 and the ash content detector 300 are relatively fixedly disposed, and both the two material gathering plates 220 are mounted on the support frame 210, wherein the two material gathering plates 220 are disposed above the conveyor belt 400 at intervals along a width direction of the conveyor belt 400, the material 500 on the conveyor belt 400 can flow to the ash content detector 300 through a channel between the two material gathering plates 220, and the two material gathering plates 220 can move toward a direction close to or away from each other, so that a channel width between the two material gathering plates 220 can be adjusted by moving the material gathering plates 220, and further, the adjustment of the overall width of the material 500 reaching the ash content detector 300 is achieved.

It should be noted that, the two material gathering plates 220 are both attached to the conveying belt 440 or have a small gap with the conveying belt 440, and the materials can be concentrated in the channel between the two material gathering plates 220, so as to achieve the material gathering effect of the material gathering plates 220, and under the condition that the total amount of the materials 500 is not changed, the whole width of the materials 500 is changed, which may cause the thickness of the materials 500 to be changed adaptively, so that, when the total amount of the materials 500 is less, the two material gathering plates 220 may be moved toward the direction close to each other to increase the thickness of the materials 500, so as to meet the requirement of the ash detector 300 on the thickness of the materials 500, and improve the detection accuracy of the ash detector 300; when the total amount of the material 500 is large, the two material gathering plates 220 can be moved in the direction of deviating from each other, so that the width of the channel between the two material gathering plates 220 is enlarged, the conveying capacity of the conveying belt 400 for the material 500 in unit time is improved, and the problem of material blockage is prevented.

Specifically, referring to fig. 6, the two material gathering plates 220 each have a material gathering portion, the plate surfaces of the two material gathering portions are inclined gradually toward the direction of approaching each other along the conveying direction of the conveyor belt 400, the material 500 can gradually move from the wider end of the channel formed by the two material gathering portions toward the narrower end of the channel formed by the two material gathering portions, that is, the material 500 can be gradually gathered when passing through the channel formed by the two material gathering portions, the overall width of the material 500 is gradually narrowed in the gathering process, accordingly, the overall thickness of the material 500 is gradually increased in the gathering process, the purpose of adjusting the height of the material 500 is achieved, and the material gathering portions can also guide the material 500, so that the gathering effect is better.

Particularly, the material gathering plate 220 and the supporting frame 210 may be connected in a sliding fit manner, so that the smoothness of the material gathering plate 220 during movement may be improved.

Referring to fig. 2 and 3, in the specific structure of the first driving device, a first motor 130 and a frequency converter 140 may be provided, an output shaft of the first motor 130 is in transmission connection with a wheel shaft 121 of the stirring wheel 120, so that the stirring wheel 120 is driven by the first motor 130 to rotate, and the frequency converter 140 is electrically connected with the first motor 130, thereby adjusting the rotation speed of the first motor 130 by changing the frequency of the frequency converter 140; the frequency converter 140 is electrically connected to the controller to control the frequency of the frequency converter 140 by the controller, thereby achieving the purpose of adjusting the rotation speed of the first motor 130.

The controller can be set to count each rotating speed of the output shaft of the first driving device, and the starting rotating speed of the output shaft of the first driving device is set according to the counting result, so that the time consumed for adjusting the rotating speed of the output shaft of the first driving device to a proper rotating speed can be shortened, and the intelligence degree can be improved.

Specifically, the controller will advance the last time period (i.e., the predetermined time period Δ t from the current time) by the predetermined time period Δ t₂The specific duration can be set according to actual needs, for example: two or three days) of the first driving device, and taking the rotating speed at which the output shaft of the first driving device appears most frequently as the next starting rotating speed.

In addition, a first distance meter and a second distance meter may be installed above the conveyor belt 400, and the first distance meter is installed between the mixing device 100 and the material gathering device 200, so that the first distance meter may measure the thickness of the material 500 between the mixing device 100 and the material gathering device 200; the second distance meter is installed between the material collecting device 200 and the ash content detector 300, so that the second distance meter can measure the thickness of the material 500 between the material collecting device 200 and the ash content detector 300.

The specific structure of the material gathering device 200 is provided with a second driving device, and two output ends of the second driving device are respectively in transmission connection with the two material gathering plates 220, so that the second driving device is used for driving the two material gathering plates 220 to move.

The first distance measuring instrument, the second distance measuring instrument and the second driving device are electrically connected with the controller, the controller can obtain the measured values of the first distance measuring instrument and the second distance measuring instrument, and the start, stop and running direction of the second driving device are controlled according to the obtained measured values.

During the process of conveying the material 500 by the conveyor belt 400, the first distance meter can detect the thickness of the material 500 moving between the mixing device 100 and the material gathering device 200 in real time and can transmit the measured thickness value (defined as a first thickness value) H to the controller; the second distance meter can detect the thickness of the material 500 moving between the gathering device 200 and the ash detector 300 in real time and can transmit the measured thickness value (defined as a second thickness value) h to the controller.

When the first thickness value H of the material 500 between the mixing device 100 and the material gathering device 200 is not less than the first reference thickness value H0, it indicates that the material 500 is sufficient, at this time, the controller may control the second driving device to drive the two material gathering plates 220 to move in the directions away from each other until the width d of the channel between the two material gathering plates 220 reaches the maximum width d0, so as to improve the evacuation capability of the channel, prevent the material 500 from being crowded, and maintain the state for a period of time (the period of time is defined as a preset time period Δ t)₃Specific time duration can be set according to time requirements, for example: 1 minute), the controller acquires the first thickness value H and the second thickness value H again, compares the first thickness value H and the second thickness value H with the corresponding reference thickness value again, and controls the action of the second driving device according to the judgment result.

When the first thickness value H of the material 500 between the material mixing device 100 and the material gathering device 200 is smaller than the first reference thickness value H0, and the second thickness value H of the material 500 between the material gathering device 200 and the ash content detector 300 reaches or exceeds the second reference value H0, the situation that the material 500 is not too many, the problem of crowding of the material 500 cannot be caused, the requirement of the ash content detector 300 on the thickness of the material 500 can be met, the current state is appropriate, and at the moment, the controller controls the second driving device to stop driving so as to maintain the current state.

When the first thickness value H of the material 500 between the mixing device 100 and the material gathering device 200 is smaller than the first reference thickness value H0, the second thickness value H of the material 500 between the material gathering device 200 and the ash content detector 300 does not reach the second reference value H0, which indicates that the material 500 is not a lot, the problem of crowding of the material 500 cannot be generated, and the requirement of the ash content detector 300 on the thickness of the material 500 cannot be met at present, at this time, the controller controls the second driving device to drive the two material gathering plates 220 to approach each other, so that the channel width d between the two material gathering plates 220 is shortened by a preset shrinkage value Δ d to narrow the channel between the two material gathering plates 220, and thus, the thickness of the material 500 is increased. Thereafter, the controller again acquires the first thickness value H and the second thickness value H and compares them again with the respective reference thickness values, if at this time the first thickness value H is still lower than the first reference thickness value H0, and the second thickness value h of the material 500 between the material gathering device 200 and the ash content detector 300 does not reach the second reference value h0, the controller continues to control the second driving device to drive the material gathering plates 220 to approach each other, so that the width of the channel between the two material gathering plates 220 is further shortened by a preset contraction value ad, so as to narrow the channel between the two material gathering plates 220, and so on, until the first thickness value H is no longer less than the first reference thickness value H0, or the second thickness value h of the material 500 between the material gathering device 200 and the ash content detector 300 is no longer smaller than the second reference value h0, the analogy process is stopped, and how to control the second driving device to act is determined again according to the specific judgment result.

Preferably, when the first thickness value H of the material 500 between the mixing device 100 and the material gathering device 200 is not less than the first reference thickness value H0, and the second thickness value H of the material 500 between the material gathering device 200 and the ash content detector 300 is not less than the second reference value H0State, duration preset safety duration Deltat₄When the material 500 is in an excessive state for a long time, the controller prompts the material 500 to be ultrahigh in thickness, so that the worker can timely acquire the excessive information of the material 500.

When the first thickness value H of the material 500 between the mixing device 100 and the material gathering device 200 is smaller than the first reference thickness value H0, and the second thickness value H of the material 500 between the material gathering device 200 and the ash content detector 300 is smaller than the second reference value H0, the preset safety duration Δ t is continued₅When the material 500 is in an insufficient state for a long time, the controller can prompt that the thickness of the material 500 is insufficient, so that the worker can timely obtain the information that the material 500 is insufficient.

Referring to fig. 7, in a specific structure of the second driving device, a second motor 230, a lead screw 240 and two nuts 250 may be provided, the second motor 230 is fixed on the supporting frame 210, an output shaft of the second motor 230 is in transmission connection with the lead screw 240, and at the same time, both the nuts 250 are engaged with the lead screw 240, and both the nuts 250 are respectively fixedly connected with the two material collecting plates 220, so that the second motor 230 operates to drive the lead screw 240 to rotate synchronously therewith, so that the two nuts 250 move in a direction approaching each other or in a direction departing from each other according to a rotation direction of the second motor 230, and thus, the two material collecting plates 220 can follow the two nuts 250 to approach each other or depart from each other synchronously.

The embodiment also provides a control method of the ash content detection system, which specifically comprises the following steps:

the ash content detector 300 detects the ash content A of the material 500 moving to the detection position in real time, transmits the detected ash content A to the controller, and the controller starts timing; when a predetermined time period Δ t₁When the maximum fluctuation amount of the internal ash content value A is larger than the reference fluctuation amount a, the controller controls the rotating speed v of the output shaft of the first driving device to be increased by a preset speed increasing value Deltav, and the timing is started again.

While the controller does the above operation, it is also possible to count each rotation speed of the output shaft of the first drive device, and set the starting rotation speed of the output shaft of the first drive device to the rotation speed at which the number of occurrences of the output shaft of the first drive device is the greatest in a predetermined time period Δ t2 from the current time onward.

When the controller does the above work, the controller can also obtain a first thickness value H of the material 500 between the mixing device 100 and the material gathering device 200 measured by the first distance meter and a second thickness value H of the material 500 between the material gathering device 200 and the ash content detector 300 measured by the second distance meter in real time.

When H is larger than or equal to H0, the controller controls the second driving device to drive the two material gathering plates 220 to deviate from each other until the width d of the channel between the two material gathering plates 220 reaches the maximum width d0, and simultaneously starts timing and counts a preset time period delta t₃Then, the first thickness value H and the second thickness value H are obtained again;

when H is less than H0 and H is more than or equal to H0, the controller controls the second driving device to stop driving;

when H is less than H0 and H is less than H0, the controller controls the second driving device to drive the two material gathering plates 220 to approach each other, so that the channel width d between the two material gathering plates 220 is shortened by a preset shrinkage value delta d, then the first thickness value H and the second thickness value H are obtained again, if H is still less than H0 and H is less than H0, the second driving device is continuously controlled to drive the material gathering plates 220 to approach each other, so that the channel width d between the two material gathering plates 220 is shortened by a preset shrinkage value delta d again, and so on until H is more than or equal to H0 or H is more than or equal to H0.

Preferably, when the state that H is more than or equal to H0 and H is more than or equal to H0 continues for the preset safety duration delta t4, the controller prompts that the thickness of the material 500 is ultrahigh.

Preferably, when the state of H < H0 and H < H0 lasts for the preset safety duration Deltat 5, the controller prompts that the thickness of the material 500 is insufficient.

In summary, the present invention discloses an ash detection system and a control method thereof, which overcome many technical defects of the conventional ash detection system. The ash content detection system and the control method thereof provided by the embodiment improve the accuracy of the ash content value of the material 500 detected by the ash content detector 300.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.