Method for controlling the thickness of a fabric, a chain and flight fabric device and system

Abstract

This invention discloses a fabric thickness control method, a chain grate fabric feeding device and system, comprising the following steps: acquiring coordinate data of each material point on the material surface of the rotary fabric feeding machine, and calculating the cross-sectional area of ​​the material based on the coordinate data of each material point; acquiring the linear speed of the belt of the rotary fabric feeding machine, and calculating the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the belt; acquiring the rotation angle of the rotary fabric feeding machine, and calculating the target rotational linear speed of the rotary fabric feeding machine based on the volumetric flow rate of the material on the rotary fabric feeding machine and the rotation angle of the rotary fabric feeding machine; and controlling the rotary fabric feeding machine to run at the target rotational linear speed.

Description

Technical Field

[0001] This invention relates to the field of pellet production technology, and in particular to a method for controlling the thickness of the feed material, a feed material distribution device and system for a chain grate machine. Background Technology

[0002] In the steel industry, pelletizing is a commonly used iron ore refining technology. The chain grate-rotary kiln-annular cooler pelletizing process is a common pelletizing technique. In this process, high-temperature gas passes through the moving grate of the chain grate, drying and preheating the pellets on the grate. Heat and mass transfer processes, as well as physicochemical reactions, occur between the pellets and the gas. The feeding of the pellets in the chain grate is a crucial step; deviations in feeding directly affect the quality of the finished pellets, the rotary kiln's ring-forming cycle, and energy consumption. Excessive deviations in the thickness of the feeding material in the chain grate will lead to uneven drying and preheating of the green pellets within the chain grate, causing not only the green pellets to easily crack but also severely impacting the output and quality of the finished pellets.

[0003] The two most common fabric feeding methods are oscillating belt and shuttle feeding. Shuttle feeding equipment requires a relatively wide layout, while oscillating feeding uses a four-bar linkage mechanism, which occupies less space and perfectly solves the problem of limited space. However, its drawback is that the fabric layer thickness of the green balls fed by the chain grate machine is uneven, mainly manifested in the horizontal and vertical inhomogeneity. Currently, ball-making plants mainly use oscillating belt feeding, controlling the uniformity of the fabric feeding by manually controlling the rotation speed of the oscillating belt. However, the relationship between rotation speed and layer thickness is difficult to control, and coupled with the instability of the incoming material, manual feeding is difficult to stabilize and cannot be adjusted in real time, resulting in poor fabric uniformity. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a fabric thickness control method, a chain grate fabric feeding device and system, which can solve the problem of poor fabric uniformity in existing oscillating belt fabric feeding technology.

[0005] According to a first aspect of the present invention, a method for controlling fabric thickness includes the following steps: acquiring coordinate data of each material point on the surface of the material on a rotary fabric spreading machine, and calculating the cross-sectional area of ​​the material based on the coordinate data of each material point; acquiring the linear speed of the belt of the rotary fabric spreading machine, and calculating the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the belt; acquiring the rotation angle of the rotary fabric spreading machine, and calculating the target rotational linear speed of the rotary fabric spreading machine based on the volumetric flow rate of the material on the rotary fabric spreading machine and the rotation angle of the rotary fabric spreading machine; and controlling the rotary fabric spreading machine to run at the target rotational linear speed.

[0006] The fabric thickness control method according to the first aspect of the present invention has at least the following beneficial effects:

[0007] The control module acquires the coordinate data of each material point on the material surface of the rotary concrete placing machine, obtains the linear speed of the conveyor belt, calculates the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the conveyor belt, acquires the rotation angle of the rotary concrete placing machine, calculates the target rotational linear speed of the rotary concrete placing machine based on the volumetric flow rate of the material on the rotary concrete placing machine and the rotation angle of the rotary concrete placing machine, and controls the rotary concrete placing machine to run at the target rotational linear speed. It can calculate the volumetric flow rate of the material based on the real-time cross-sectional area of ​​the material on the rotary concrete placing machine, and control the rotational linear speed of the rotary concrete placing machine in real time based on the volumetric flow rate, so that the thickness of the fabric laid by the rotary concrete placing machine is uniform.

[0008] According to some embodiments of the present invention, the formula for calculating the target rotational linear velocity is as follows: Where V1 is the target rotational linear velocity of the rotary fabric placing machine, and W v S1 is the volumetric flow rate of the material on the rotary concrete placing machine, S1 is the cross-sectional coefficient, and θ is the rotation angle of the rotary concrete placing machine.

[0009] According to some embodiments of the present invention, the formula for calculating the volumetric flow rate of the material on the rotary fabric feeder is: W v =S2*V2, where S2 is the cross-sectional area of ​​the material on the rotating concrete placing machine, and V2 is the linear velocity of the belt of the rotating concrete placing machine.

[0010] According to some embodiments of the present invention, the formula for calculating the cross-sectional area of ​​the material on the rotary fabric distribution machine is as follows: Where L is the belt width of the rotary fabric distribution machine, h x f is the vertical distance from the belt point at coordinate x to the laser scanner. x Let x be the distance from the material point at the x-coordinate to the laser scanner along the vertical direction. This represents the sampling step size of the laser scanner in the horizontal direction.

[0011] According to a second aspect of the present invention, a chain grate feeding device includes: a control module; a rotary feeding machine, the output end of the control module being connected to the control end of the rotary feeding machine for controlling the target rotational linear speed of the rotary feeding machine; a laser scanner, the output end of the laser scanner being connected to the input end of the control module; the control module uses a feeding thickness control method to control the target rotational linear speed of the rotary feeding machine, the feeding thickness control method including: acquiring coordinate data of each material point on the surface of the material on the rotary feeding machine, and calculating the cross-sectional area of ​​the material based on the coordinate data of each material point; acquiring the linear speed of the belt of the rotary feeding machine, and calculating the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the belt; acquiring the rotation angle of the rotary feeding machine, and calculating the target rotational linear speed of the rotary feeding machine based on the volumetric flow rate of the material on the rotary feeding machine and the rotation angle of the rotary feeding machine; and controlling the rotary feeding machine to run at the target rotational linear speed.

[0012] The chain grate feeding device according to a second aspect embodiment of the present invention has at least the following beneficial effects:

[0013] The control module acquires the coordinate data of each material point on the material surface of the rotary concrete placing machine, obtains the linear speed of the conveyor belt, calculates the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the conveyor belt, acquires the rotation angle of the rotary concrete placing machine, calculates the target rotational linear speed of the rotary concrete placing machine based on the volumetric flow rate of the material on the rotary concrete placing machine and the rotation angle of the rotary concrete placing machine, and controls the rotary concrete placing machine to run at the target rotational linear speed. It can calculate the volumetric flow rate of the material based on the real-time cross-sectional area of ​​the material on the rotary concrete placing machine, and control the rotational linear speed of the rotary concrete placing machine in real time based on the volumetric flow rate, so that the thickness of the fabric laid by the rotary concrete placing machine is uniform.

[0014] According to some embodiments of the present invention, the rotary fabric spreading machine includes a first support, a roller, and a belt, wherein the roller is mounted on top of the first support and the belt is mounted on the roller.

[0015] According to some embodiments of the present invention, a second bracket is also included, through which the laser scanner is mounted on the first bracket.

[0016] According to a third aspect of the present invention, a chain grate feeding system includes: a feeder; the aforementioned chain grate feeding device, wherein the rotary feeder is used to feed material onto the feeder.

[0017] The chain grate feeding system according to a third aspect embodiment of the present invention has at least the following beneficial effects:

[0018] The control module acquires the coordinate data of each material point on the material surface of the rotary concrete placing machine, obtains the linear speed of the conveyor belt, calculates the volumetric flow rate of the material based on the cross-sectional area of ​​the material and the linear speed of the conveyor belt, acquires the rotation angle of the rotary concrete placing machine, calculates the target rotational linear speed of the rotary concrete placing machine based on the volumetric flow rate of the material on the rotary concrete placing machine and the rotation angle of the rotary concrete placing machine, and controls the rotary concrete placing machine to run at the target rotational linear speed. It can calculate the volumetric flow rate of the material based on the real-time cross-sectional area of ​​the material on the rotary concrete placing machine, and control the rotational linear speed of the rotary concrete placing machine in real time based on the volumetric flow rate, so that the thickness of the fabric laid by the rotary concrete placing machine is uniform.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a cross-sectional schematic diagram of the chain grate feeding device of the present invention;

[0022] Figure 2 This is a top view of the chain grate feeding system of the present invention;

[0023] Figure 3 This is a left view of the chain grate feeding system of the present invention;

[0024] Figure 4 This is a flowchart of the fabric thickness control method of the present invention.

[0025] Icon labels:

[0026] Rotary fabric distribution machine 100, first support 110, idler roller 120, belt 130.

[0027] Laser scanner 200

[0028] Second support 300

[0029] Feeder 400

[0030] Material 500. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0033] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0034] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0035] The following reference Figures 1 to 4 A method for controlling fabric thickness, a fabric feeding device and system for a chain grate machine, and an embodiment of the present invention are described.

[0036] like Figure 4 As shown, the fabric thickness control method according to a first aspect embodiment of the present invention includes the following steps:

[0037] S100: The coordinate data of each material point on the surface of the material 500 on the rotating fabric feeder 100 is acquired by the laser scanner 200. Each time the laser scanner 200 performs a single data measurement, it generates n distances and corresponding angles from the material points to the laser scanner 200, where the k-th data point is the material point P. K The angle it measures is θ K The measured distance is d K Then its corresponding X-axis and Y-axis coordinate values ​​P K-x P K-y They are respectively:

[0038] P K-X =d K *sin(θ K )

[0039] P K-y =d K *cos(θ K )

[0040] P K-y Let P be the material point. KThe vertical distance to the laser scanner 200. The laser scanner 200 can measure the coordinate data of each material point. Based on the coordinate data of each material point, the cross-sectional area of ​​the material 500 is calculated. The formula for calculating the cross-sectional area of ​​the material 500 on the rotating fabric distribution machine 100 is: Where L is the width of the belt 130 of the rotary fabric distribution machine 100, and h x h is the vertical distance from the belt point at coordinate x to laser scanner 200. x To advance, f x Let x be the distance from the material point at the x-coordinate to the laser scanner 200 along the vertical direction. This refers to the sampling step size of the laser scanner 200 in the horizontal direction.

[0041] S200: Obtain the linear velocity of the belt 130 of the rotary placing boom 100. Calculate the volumetric flow rate of the material 500 based on the cross-sectional area of ​​the material 500 and the linear velocity of the belt 130. The formula for calculating the volumetric flow rate of the material 500 on the rotary placing boom 100 is: W v =S2*V2, where S2 is the cross-sectional area of ​​the material 500 on the rotary cloth feeder 100, and V2 is the linear velocity of the belt 130 of the rotary cloth feeder 100.

[0042] S300: Obtain the rotation angle of the rotary placing boom 100. Calculate the target rotational linear velocity of the rotary placing boom 100 based on the volumetric flow rate of the material 500 on the rotary placing boom 100 and the rotation angle of the rotary placing boom 100. The formula for calculating the target rotational linear velocity of the rotary placing boom 100 is: Where V1 is the target rotational linear velocity of the rotary fabric placing machine 100, and W v S1 is the volumetric flow rate of material 500 on the rotary placing boom 100, S1 is the cross-sectional coefficient, which is obtained through on-site calibration, and θ is the rotation angle of the rotary placing boom 100.

[0043] S400 controls the rotating fabric feeder 100 to run at the target rotational linear speed.

[0044] The laser scanner 200 acquires the coordinate data of each material point on the surface of the material 500 on the rotary fabric spreading machine 100, and obtains the linear speed of the belt 130 of the rotary fabric spreading machine 100. The control module calculates the volumetric flow rate of the material 500 based on the cross-sectional area of ​​the material 500 and the linear speed of the belt 130. The control module also acquires the rotation angle of the rotary fabric spreading machine 100, calculates the target rotational linear speed of the rotary fabric spreading machine 100 based on the volumetric flow rate of the material 500 on the rotary fabric spreading machine 100 and the rotation angle, and controls the rotary fabric spreading machine 100 to run at the target rotational linear speed. The control module can calculate the volumetric flow rate of the material 500 based on the real-time cross-sectional area of ​​the material 500 on the rotary fabric spreading machine 100, and control the rotational linear speed of the rotary fabric spreading machine 100 in real time based on the volumetric flow rate, so that the fabric thickness of the rotary fabric spreading machine 100 is uniform.

[0045] like Figure 1 As shown, the chain grate feeding device according to a second aspect embodiment of the present invention includes: a control module, a rotary feeding machine 100, and a laser scanner 200. The output end of the control module is connected to the control end of the rotary feeding machine 100 to control the target rotational linear speed of the rotary feeding machine 100. The output end of the laser scanner 200 is connected to the input end of the control module to detect the cross-sectional area of ​​the material 500 on the rotary feeding machine 100. The control module uses a feeding thickness control method to control the target rotational linear speed of the rotary feeding machine 100. The feeding thickness control method includes: obtaining the cross-sectional area of ​​the material 500 on the material 500 through the laser scanner 200. The coordinate data of each material point on the surface of the material 500 on the rotary concrete placing machine 100 are obtained, and the cross-sectional area of ​​the material 500 is calculated based on the coordinate data of each material point; the linear velocity of the belt 130 of the rotary concrete placing machine 100 is obtained, and the volumetric flow rate of the material 500 is calculated based on the cross-sectional area of ​​the material 500 and the linear velocity of the belt 130; the rotation angle of the rotary concrete placing machine 100 is obtained, and the target rotational linear velocity of the rotary concrete placing machine 100 is calculated based on the volumetric flow rate of the material 500 on the rotary concrete placing machine 100 and the rotation angle of the rotary concrete placing machine 100; the rotary concrete placing machine 100 is controlled to run at the target rotational linear velocity. The laser scanner 200 is a 2D laser scanner, but a 3D laser scanner can also be used.

[0046] The laser scanner 200 acquires the coordinate data of each material point on the surface of the material 500 on the rotary fabric spreading machine 100, and obtains the linear speed of the belt 130 of the rotary fabric spreading machine 100. The control module calculates the volumetric flow rate of the material 500 based on the cross-sectional area of ​​the material 500 and the linear speed of the belt 130. The control module also acquires the rotation angle of the rotary fabric spreading machine 100, calculates the target rotational linear speed of the rotary fabric spreading machine 100 based on the volumetric flow rate of the material 500 on the rotary fabric spreading machine 100 and the rotation angle, and controls the rotary fabric spreading machine 100 to run at the target rotational linear speed. The control module can calculate the volumetric flow rate of the material 500 based on the real-time cross-sectional area of ​​the material 500 on the rotary fabric spreading machine 100, and control the rotational linear speed of the rotary fabric spreading machine 100 in real time based on the volumetric flow rate, so that the fabric thickness of the rotary fabric spreading machine 100 is uniform.

[0047] like Figure 1 As shown, the rotary fabric feeder 100 includes a first support 110, a roller 120 and a belt 130. The roller 120 is mounted on the top of the first support 110, and the belt 130 is mounted on the roller 120. The first support 110 supports the roller 120, and the belt 130 rotates on the roller 120. The structure is stable and can stably convey materials 500.

[0048] like Figure 1 As shown, it also includes a second bracket 300. The laser scanner 200 is mounted on the first bracket 110 via the second bracket 300 and can accurately acquire the coordinate data of each material point on the surface of the material 500 on the rotating fabric feeder 100.

[0049] like Figures 2 to 3 As shown, according to a third aspect embodiment of the present invention, a chain grate feeding system includes: a feeder 400; and the aforementioned chain grate feeding device, wherein a rotating feeder 100 is used to feed material onto the feeder 400.

[0050] The laser scanner 200 acquires the coordinate data of each material point on the surface of the material 500 on the rotary fabric spreading machine 100, and obtains the linear speed of the belt 130 of the rotary fabric spreading machine 100. The control module calculates the volumetric flow rate of the material 500 based on the cross-sectional area of ​​the material 500 and the linear speed of the belt 130. The control module also acquires the rotation angle of the rotary fabric spreading machine 100, calculates the target rotational linear speed of the rotary fabric spreading machine 100 based on the volumetric flow rate of the material 500 on the rotary fabric spreading machine 100 and the rotation angle, and controls the rotary fabric spreading machine 100 to run at the target rotational linear speed. The control module can calculate the volumetric flow rate of the material 500 based on the real-time cross-sectional area of ​​the material 500 on the rotary fabric spreading machine 100, and control the rotational linear speed of the rotary fabric spreading machine 100 in real time based on the volumetric flow rate, so that the fabric thickness of the rotary fabric spreading machine 100 is uniform.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method of fabric thickness control, characterized by, Includes the following steps: Obtain the coordinate data of each material point on the surface of the material (500) on the rotary fabric spreading machine (100), and calculate the cross-sectional area of ​​the material (500) based on the coordinate data of each material point; the formula for calculating the cross-sectional area of ​​the material (500) on the rotary fabric spreading machine (100) is as follows: * ,in, The cross-sectional area of ​​the material (500) on the rotating cloth feeder (100) is given. For the width of the belt (130) of the rotating fabric placing machine (100), Let x be the vertical distance from the belt point at coordinate x to the laser scanner (200). Let x be the distance from the material point at coordinate x to the laser scanner (200) along the vertical direction. The sampling step size of the laser scanner (200) in the horizontal direction; Obtain the linear velocity of the belt (130) of the rotary fabric spreading machine (100), and calculate the volumetric flow rate of the material (500) based on the cross-sectional area of ​​the material (500) and the linear velocity of the belt (130); the formula for calculating the volumetric flow rate of the material (500) on the rotary fabric spreading machine (100) is as follows: ,in, The volumetric flow rate of the material (500) on the rotary cloth feeder (100) is given. The cross-sectional area of ​​the material (500) on the rotating cloth feeder (100) is given. The linear speed of the belt (130) of the rotating fabric spreading machine (100); Obtain the rotation angle of the rotary placing boom (100), and calculate the target rotational linear velocity of the rotary placing boom (100) based on the volumetric flow rate of the material (500) on the rotary placing boom (100) and the rotation angle of the rotary placing boom (100); the calculation formula for the target rotational linear velocity is: ,in, The target rotational linear velocity of the rotating fabric placing machine (100) is... The volumetric flow rate of the material (500) on the rotary cloth feeder (100) is given. The cross-sectional coefficient, The rotation angle of the rotating fabric placing machine (100); Control the rotating fabric spreading machine (100) to run at the target rotational linear speed.

2. A chain grate feeding device, characterized in that, include: Control module; A rotary fabric laying machine (100), wherein the output terminal of the control module is connected to the control terminal of the rotary fabric laying machine (100) to control the target rotational linear speed of the rotary fabric laying machine (100); A laser scanner (200), the output of which is connected to the input of the control module; The control module uses a fabric thickness control method to control the target rotational linear velocity of the rotary fabric spreading machine (100). The fabric thickness control method includes: acquiring the coordinate data of each material point on the surface of the material (500) on the rotary fabric spreading machine (100), and calculating the cross-sectional area of ​​the material (500) based on the coordinate data of each material point; the formula for calculating the cross-sectional area of ​​the material (500) on the rotary fabric spreading machine (100) is: * ,in, The cross-sectional area of ​​the material (500) on the rotating cloth feeder (100) is given. For the width of the belt (130) of the rotating fabric placing machine (100), Let x be the vertical distance from the belt point at coordinate x to the laser scanner (200). Let x be the distance from the material point at coordinate x to the laser scanner (200) along the vertical direction. The sampling step size of the laser scanner (200) in the horizontal direction is used; the linear velocity of the belt (130) of the rotary fabric spreading machine (100) is obtained, and the volumetric flow rate of the material (500) is calculated based on the cross-sectional area of ​​the material (500) and the linear velocity of the belt (130); the formula for calculating the volumetric flow rate of the material (500) on the rotary fabric spreading machine (100) is as follows: ,in, The volumetric flow rate of the material (500) on the rotary cloth feeder (100) is given. The cross-sectional area of ​​the material (500) on the rotating cloth feeder (100) is given. The linear velocity of the belt (130) of the rotary placing boom (100) is obtained; the rotation angle of the rotary placing boom (100) is acquired, and the target rotational linear velocity of the rotary placing boom (100) is calculated based on the volumetric flow rate of the material (500) on the rotary placing boom (100) and the rotation angle of the rotary placing boom (100); the formula for calculating the target rotational linear velocity is: ,in, The target rotational linear velocity of the rotating fabric placing machine (100) is... The volumetric flow rate of the material (500) on the rotary cloth feeder (100) is given. The cross-sectional coefficient, The rotation angle of the rotating fabric placing machine (100); control the rotating fabric placing machine (100) to run at the target rotational linear speed.

3. The chain grate feeding device according to claim 2, characterized in that: The rotary fabric spreading machine (100) includes a first support (110), a roller (120) and a belt (130), the roller (120) being mounted on the top of the first support (110) and the belt (130) being mounted on the roller (120).

4. The chain grate feeding device according to claim 3, characterized in that: It also includes a second bracket (300), through which the laser scanner (200) is mounted on the first bracket (110).

5. A chain grate feeding system, characterized in that, include: Feeder (400); The chain grate feeding device according to any one of claims 2 to 4, wherein the rotary feeder (100) is used to feed material on the feeder (400).

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