A method for measuring the inclination angle of a chute

Abstract

The present application relates to a method for measuring the inclination angle of a chute, the method comprising: emitting two laser beams to the chute at the manhole position, and measuring the angle C between the two laser beams and the distance a and distance b from the two laser beams to the chute; using the angle C, distance a and distance b to calculate the inclination angle D of the chute; wherein the directions of the two laser beams are horizontal and obliquely upward, respectively. The method uses laser ranging and angle measurement, which is convenient, accurate and fast. When applied to the inclination angle measurement of the blast furnace distribution chute, it can effectively solve the technical problems of low accuracy, precision and efficiency in the existing blast furnace distribution chute inclination angle measurement.

Description

Technical Field

[0001] The present application relates to the technical field of measuring the inclination angle of a blast furnace distribution chute, and in particular to a method for measuring the inclination angle of a chute. Background Art

[0002] Blast furnace charge distribution refers to the distribution of charge in the blast furnace throat during the blast furnace ironmaking process. The change in the inclination angle of the charge chute during the production process directly affects the uniform charge distribution effect of the blast furnace. Once the inclination angle of the charge chute is lost and cannot be determined, it will directly affect the angle of the blast furnace charge distribution, the uniformity of the charge distribution and the strength of the charge distribution, and further affect the permeability of the charge in the furnace and the distribution of the airflow in the charge. Therefore, the angle measurement of the charge chute is crucial in the blast furnace production process.

[0003] At present, the inclination angle of the blast furnace distribution chute is measured by using a spirit level fixed on a T-shaped angle measuring aluminum bracket. The angle of the spirit level is read to reflect the inclination angle of the distribution chute. The measurement accuracy, precision and efficiency are not high. Summary of the invention

[0004] The present application provides a method for measuring the inclination of a chute, so as to solve the technical problems of low measurement accuracy, precision and efficiency in the existing inclination measurement of a blast furnace distribution chute.

[0005] In a first aspect, the present application provides a method for measuring a chute inclination, the method comprising:

[0006] At the manhole position, two laser beams are emitted to the chute, and the angle C between the two laser beams and the distance a and distance b from the two laser beams to the chute are measured;

[0007] Calculate the degree of the inclination angle D of the chute using the angle C, distance a and distance b;

[0008] The directions of the two laser beams are horizontal and obliquely upward respectively.

[0009] Further, the calculation of the degree of the inclination angle D of the chute using the degree of the angle C, the distance a and the distance b includes:

[0010] Using the degree of the angle C, the distance a and the distance b, and the law of cosines, the distance c between the two landing points of the two laser beams on the chute is obtained;

[0011] Using the distance c, the distance a and the distance b, the degree of the angle B between the laser obliquely upward and the chute is obtained by the law of cosines;

[0012] Using the degrees of the angle B and the angle C, the degree of the inclination angle D is obtained.

[0013] Further, the distance c between two landing points of the two laser beams on the chute is obtained by using the degree of the angle C, the distance a and the distance b through the law of cosines; including:

[0014] According to formula 1, the distance c is obtained:

[0015] Formula 1: c 2 =a 2 +b 2 -2ab·cosC;

[0016] Wherein, C represents the degree of the angle C.

[0017] Furthermore, the distance c, the distance a and the distance b are used to obtain the degree of the angle B between the laser obliquely upward and the chute through the cosine theorem, including:

[0018] According to Formula 2, the degree of the angle B is obtained, wherein the distance from the laser obliquely upward to the chute is a,

[0019] Formula 2: b 2 =a 2 +c 2 -2ac·cosB;

[0020] Wherein, B represents the degree of angle B.

[0021] Further, the using the degrees of the angle B and the angle C to obtain the degree of the inclination angle D comprises:

[0022] According to Formula 3, the degree of the inclination angle D is obtained:

[0023] Formula 3: ∠D=90-(∠C+∠B).

[0024] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0025] An embodiment of the present application provides a method for measuring the inclination angle of a chute. The method emits two laser beams to the chute, and measures the angle between the two laser beams and the distance from the two laser beams to the chute through laser ranging and angle measurement, and then calculates the inclination angle of the chute through the measured data. The method uses laser ranging and angle measurement, which is convenient, accurate and fast. When applied to the inclination angle measurement of a blast furnace distribution chute, it can effectively solve the technical problems of low measurement accuracy, precision and efficiency in the existing inclination angle measurement of a blast furnace distribution chute. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 A mathematical principle diagram of a method for measuring the inclination of a chute provided in an embodiment of the present application (where 1 is a laser source and 2 is a chute);

[0029] Figure 2 A schematic flow chart of a method for measuring the inclination angle of a chute provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in this application can be purchased from the market or prepared by existing methods.

[0032] Blast furnace charge distribution refers to the distribution of charge in the blast furnace throat during the blast furnace ironmaking process. The change in the inclination angle of the charge chute during the production process directly affects the uniform charge distribution effect of the blast furnace. Once the inclination angle of the charge chute is lost and cannot be determined, it will directly affect the angle of the blast furnace charge distribution, the uniformity of the charge distribution and the strength of the charge distribution, and further affect the permeability of the charge in the furnace and the distribution of the airflow in the charge. Therefore, the angle measurement of the charge chute is crucial in the blast furnace production process.

[0033] At present, the inclination angle of the blast furnace distribution chute is measured by using a spirit level fixed on a T-shaped angle measuring aluminum bracket. The angle of the spirit level is read to reflect the inclination angle of the distribution chute. The measurement accuracy, precision and efficiency are not high.

[0034] The technical solution provided by the embodiment of the present invention is to solve the above technical problems, and the overall idea is as follows:

[0035] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a method for measuring the inclination of a chute, the method comprising:

[0036] At the manhole position, two laser beams are emitted to the chute, and the angle C between the two laser beams and the distance a and distance b from the two laser beams to the chute are measured;

[0037] Calculate the degree of the inclination angle D of the chute using the angle C, distance a and distance b;

[0038] The directions of the two laser beams are horizontal and obliquely upward respectively.

[0039] An embodiment of the present application provides a method for measuring the inclination angle of a chute. The method emits two laser beams to the chute, and measures the angle between the two laser beams and the distance from the two laser beams to the chute through laser ranging and angle measurement, and then calculates the inclination angle of the chute through the measured data. The method uses laser ranging and angle measurement, which is convenient, accurate and fast. When applied to the inclination angle measurement of a blast furnace distribution chute, it can effectively solve the technical problems of low measurement accuracy, precision and efficiency in the existing inclination angle measurement of a blast furnace distribution chute.

[0040] As an implementation manner of an embodiment of the present invention, the degree of the inclination angle D of the chute is calculated using the degree of the angle C, the distance a and the distance b, including:

[0041] Using the degree of the angle C, the distance a and the distance b, and the law of cosines, the distance c between the two landing points of the two laser beams on the chute is obtained;

[0042] Using the distance c, the distance a and the distance b, the degree of the angle B between the laser obliquely upward and the chute is obtained by the law of cosines;

[0043] Using the degrees of the angle B and the angle A, the degree of the inclination angle D is obtained.

[0044] In the present application, the degree of the tilt angle D is calculated by mathematical principles, and the result can be obtained quickly, accurately and efficiently by designing a computer program.

[0045] As an implementation method of an embodiment of the present invention, the distance c between two landing points of the two laser beams on the chute is obtained by using the degree of the angle C, the distance a and the distance b through the law of cosines; including:

[0046] According to formula 1, the distance c is obtained:

[0047] Formula 1: c 2 =a 2 +b 2 -2ab·cosC;

[0048] Wherein, C represents the degree of the angle C.

[0049] In the present application, the distance between two landing points of two laser beams on the chute is calculated using the cosine theorem, and the result can be obtained quickly, accurately and efficiently by designing a computer program.

[0050] As an implementation manner of the embodiment of the present invention, the distance c, the distance a and the distance b are used to obtain the degree of the angle B between the laser obliquely upward and the chute through the cosine theorem, including:

[0051] According to Formula 2, the degrees of the angle B and the angle A are obtained, wherein the distance from the laser obliquely upward to the chute is a,

[0052] Formula 2: b 2 =a 2 +c 2 -2ac·cosB;

[0053] Wherein, B represents the degree of angle B.

[0054] In the present application, the cosine theorem is used to calculate the degree of the angle B between the laser obliquely pointing upward and the chute, and the result can be obtained quickly, accurately and efficiently by designing a computer program.

[0055] As an implementation manner of the embodiment of the present invention, the degree of the inclination angle D is obtained by using the degrees of the angle B and the angle A, including:

[0056] According to Formula 3, the degree of the inclination angle D is obtained:

[0057] Formula 3: ∠D=90-(∠C+∠B).

[0058] In the present application, since the horizontal laser is perpendicular to the vertical direction, the angle D and degree are 180-90-(∠C-∠B)=90-(∠C+∠B).

[0059] The present application will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are intended only to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0060] Example 1

[0061] A method for measuring the inclination of a chute, the mathematical principle of which is as follows Figure 1 The process diagram is shown in Figure 2 Specifically: at the manhole position, two laser beams are emitted to the chute, one in the horizontal direction and one in the oblique upward direction, and the angle C between the two laser beams and the distance a and distance b from the two laser beams to the chute are measured;

[0062] By c 2 =a 2 +b 2 -2ab·cosC, calculate the distance c between the two landing points of the two laser beams on the chute;

[0063] By b 2 =a 2 +c 2 -2ac·cosB, calculate the angle B between the upward oblique laser and the chute;

[0064] By ∠D=90-(∠C+∠B), calculate the degree of the chute inclination angle D;

[0065] The specific measurement data are shown in Table 1.

[0066] Example 2

[0067] The direction of the obliquely upward laser in Example 1 is changed, and the rest is the same as Example 1.

[0068] Example 3

[0069] The direction of the obliquely upward laser in Example 1 is changed, and the rest is the same as Example 1.

[0070] Example 4

[0071] The direction of the obliquely upward laser in Example 1 is changed, and the rest is the same as Example 1.

[0072] Example 5

[0073] The direction of the obliquely upward laser in Example 1 is changed, and the rest is the same as Example 1.

[0074] Comparative Example 1

[0075] A spirit level was fixed on a T-shaped aluminum angle measuring bracket, and the angle of the spirit level was read to reflect the inclination angle of the material distribution chute. The measured angle of the spirit level was 67.3°, and the inclination angle of the material distribution chute was 23.7°.

[0076] Table 1 Calculation data in the embodiment

[0077]

[0078] In summary, the method for measuring the inclination angle of the chute in the embodiment of the present application adopts laser ranging and angle measurement, which is fast and accurate, and can quickly measure the inclination angle of the distribution chute during blast furnace maintenance, thereby achieving the convenience and economy of measuring the angle of the distribution chute.

[0079] Various embodiments of the present application may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present application; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0080] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the description of the present specification, the terms "including", "comprising", etc. refer to "including but not limited to". In this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In this article, "and / or" describes the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In this article, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b, or c", or "at least one of a, b and c", can both mean: a, b, c, ab (i.e. a and b), ac, bc or abc, where a, b, c can be single or plural, respectively.

[0081] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A method for measuring the inclination of a chute, characterized in that: The measuring method comprises: At the manhole position, two laser beams are emitted to the chute, and the angle C between the two laser beams and the distance a and distance b from the two laser beams to the chute are measured; The directions of the two laser beams are respectively horizontal and obliquely upward, and the angle C between the two laser beams is an acute angle; Using the degree of the angle C, the distance a and the distance b, the distance c between the two landing points of the two laser beams on the chute is obtained through formula 1; Formula 1: c 2 =a 2 +b 2 -2ab·cos∠C; According to formula 2, we can get the degree of angle B; Formula 2: b 2 =a 2 +c 2 -2ac·cos∠B; According to formula 3, the degree of the chute inclination angle D is obtained: Formula 3: ∠D=90°-(∠C+∠B); Wherein, ∠B is the angle between the laser in the oblique upward direction and the chute; a represents the distance from the laser in the oblique upward direction to the chute.

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