Method for measuring concentricity of rotary kiln

Abstract

The invention relates to a method for measuring the concentricity of a rotary kiln, which comprises the following steps of: determining central points at the head end and the tail end of a kiln body by using a laser instrument, and measuring the central moment of laser points at the head end and the tail end of the kiln body, the central moment being the distance from the laser point at the measurement position to the inner surface of the kiln body; the laser instrument is adopted to measure the center distance of N to-be-measured middle point positions of the middle section of the kiln body, and N is a natural number larger than 1; comparing the center distance data values of the laser points of the to-be-measured middle point positions of the middle section of the kiln body with the center moment data values of the laser points at the head end and the tail end of the kiln body one by one to obtain concentricity; by means of the arrangement, compared with a traditional measuring method, the working efficiency and accuracy of concentricity measurement are improved.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical engineering, and in particular to a method for measuring the concentricity of a rotary kiln. Background Art

[0002] At present, with the rapid development of production technology, the improvement of production technology requires the installation accuracy to be improved accordingly. At present, the ironmaking process of sintering and blast furnace is gradually developing towards the production process of rotary kiln and submerged arc furnace. More and more production enterprises choose the production process of rotary kiln and submerged arc furnace to replace the production process of sintering and blast furnace. The installation accuracy of rotary kiln is very important for the normal operation of production. During the installation of rotary kiln, the concentricity of each position of the cylinder is an extremely important parameter in the installation process of rotary kiln, and the measurement method of concentricity is also directly related to the installation accuracy of rotary kiln.

[0003] The concentricity of the rotary kiln is measured by taking the center line of the two ends of the rotary kiln's cylinder as the center line, and the deviation between the center line and the center line of the cross section at other positions in the cylinder is the concentricity at that position. The traditional method for measuring the concentricity of the rotary kiln cylinder is the hanging steel wire method, that is, two thin steel wires are pulled between the two ends of the inner wall of the cylinder, 90° apart, and the two thin steel wires are used as the reference line to determine the concentricity. Since the axial length of the rotary kiln cylinder is long, the length of the thin steel wire is also long, which causes the thin steel wire to fall, resulting in inaccurate concentricity measurement. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a method for measuring the concentricity of a rotary kiln, which has the advantage of being able to improve the accuracy of concentricity measurement.

[0005] The above-mentioned invention object of the present invention is achieved through the following technical scheme: A method for measuring the concentricity of a rotary kiln comprises the following steps:

[0006] Using a laser instrument to determine the center points of both ends of the kiln body, and measuring the center moments of the laser points at both ends of the kiln body, wherein the center moment is the distance from the laser point at the measuring position to the inner surface of the kiln body;

[0007] The laser instrument is used to measure the center distances of N middle points to be measured in the middle section of the kiln body, wherein N is a natural number greater than 1;

[0008] The center distance data values ​​of the laser points at each middle point to be measured in the middle section of the kiln body are compared one by one with the center moment data values ​​of the laser points at the two ends of the kiln body to obtain the concentricity between the middle section of the kiln body and the two ends of the kiln body.

[0009] Preferably, in the method for measuring the concentricity of a rotary kiln provided by the present invention, the kiln body comprises a plurality of cylinders, the plurality of cylinders are connected in sequence, each of the cylinders is provided with at least two Poié-shaped supports, the two Poié-shaped supports are respectively arranged at the head and tail ends of the cylinder, a central circular hole is opened at the geometric center of each of the Poié-shaped supports, and the central circular hole penetrates the Poié-shaped supports along the centerline direction of the cylinder.

[0010] Preferably, the method for measuring the concentricity of a rotary kiln provided by the present invention, the cross-shaped support includes an octagonal connecting plate, a horizontal strut, two oppositely arranged vertical struts and four inclined struts, the horizontal strut is erected on the octagonal connecting plate, the horizontal strut is connected to the octagonal connecting plate, the two vertical struts are respectively arranged at the top and bottom ends of the octagonal connecting plate, the ends of the four inclined struts are all connected to the outer side wall of the octagonal connecting plate, and the four inclined struts are arranged at circumferential intervals around the octagonal connecting plate; a through hole is opened at the geometric center position of the octagonal connecting plate, a through hole is opened at the middle position of the horizontal strut extending along the center line direction thereof, the through hole passes through the horizontal strut, the through hole is arranged corresponding to the through hole, and the through hole is connected to the through hole to form the central circular hole.

[0011] Preferably, the method for measuring the concentricity of a rotary kiln provided by the present invention, wherein the center points of both ends of the kiln body are determined by using a laser instrument, and the center moments of the laser points at both ends of the kiln body are measured, comprises:

[0012] A platform is set up outside the front end or the rear end of the kiln body, and the laser instrument is installed on the platform;

[0013] A mark plate is placed on the central circular holes of the first and last rice support in the kiln body to check whether the laser point emitted by the laser instrument is located at the center of the central circular hole. If the laser point is not located at the center of the central circular hole, the laser point is adjusted to the center of the central circular holes of the first and last rice support in the kiln body, and the laser instrument is fixed.

[0014] Preferably, in the method for measuring the concentricity of a rotary kiln provided by the present invention, when the laser point is at the center of the central circular holes of the first and last two rice support members in the kiln body, the laser path is the kiln body concentricity reference line.

[0015] Preferably, in the method for measuring the concentricity of a rotary kiln provided by the present invention, when the laser point is at the center of the central circular hole of the first and last two rice supports in the kiln body, the center distances of the laser points at the first and last ends of the kiln body are both equal to the radius of the cylinder.

[0016] Preferably, the method for measuring the concentricity of a rotary kiln provided by the present invention, wherein the laser instrument is used to measure the center distances of N intermediate points to be measured in the middle section of the kiln body, comprises:

[0017] The target plate is placed on the cross-shaped support of one of the intermediate points to be measured to find the laser point, and the central moment of the laser point on the cross-shaped support of the intermediate point to be measured is measured, and at least four center distance data values ​​are measured at the cross-shaped support of the intermediate point to be measured; after the measurement and recording of one intermediate point to be measured is completed, the target plate is removed and used for the next intermediate point to be measured for measurement.

[0018] Preferably, the method for measuring the concentricity of a rotary kiln provided by the present invention, wherein the step of placing the target plate on a cross-shaped support at the middle point to be measured and finding the laser point comprises:

[0019] The laser sequentially passes through the central circular holes on the plurality of the '-shaped supports and is projected onto the target plate on the '-shaped support at the middle point to be measured to form a laser spot.

[0020] Preferably, in the method for measuring the concentricity of a rotary kiln provided by the present invention, when measuring N intermediate points to be measured, staff are reserved at both ends of the kiln body to check whether the laser points at the two ends of the kiln body move before measuring each intermediate point to be measured.

[0021] Preferably, in the method for measuring the concentricity of a rotary kiln provided by the present invention, the laser instrument is a level.

[0022] In summary, the beneficial technical effects of the present invention are as follows: the method for measuring the concentricity of a rotary kiln provided in the present application comprises the following steps: using a laser instrument to determine the center points of the two ends of a kiln body, and measuring the center moments of the laser points at the two ends of the kiln body, wherein the center moment is the distance from the laser point at the measuring position to the inner surface of the kiln body; using the laser instrument to measure the center distances of N middle points to be measured in the middle section of the kiln body, wherein N is a natural number greater than 1; comparing the center distance data values ​​of the laser points of each middle point to be measured in the middle section of the kiln body with the center moment data values ​​of the laser points at the two ends of the kiln body one by one to obtain the concentricity; such an arrangement improves the work efficiency and accuracy of the concentricity measurement compared with the traditional measurement method. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a flowchart of a rotary kiln concentricity measurement method provided in an embodiment of the present invention.

[0024] Figure 2 The diagram is a schematic diagram of the connection structure between the drum and the cross-shaped support in the method for measuring the concentricity of the rotary kiln provided in the embodiment of the present invention. Figure 1 .

[0025] Figure 3 The diagram is a schematic diagram of the connection structure between the drum and the cross-shaped support in the method for measuring the concentricity of the rotary kiln provided in the embodiment of the present invention. Figure 2 .

[0026] In the figure, 1, cylinder; 2, M-shaped support; 21, octagonal connecting plate; 22, horizontal support rod; 23, vertical support rod; 24, inclined support rod; 25, center circular hole; 3, laser. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0028] Reference Figures 1 to 3 , a method for measuring the concentricity of a rotary kiln disclosed in the present invention, comprising the following steps:

[0029] S101. Use a laser instrument to determine the center points of both ends of the kiln body, and measure the center moments of the laser points at both ends of the kiln body, wherein the center moment is the distance from the laser point at the measuring position to the inner surface of the kiln body.

[0030] Exemplary, the laser instrument can adopt a level. Of course, the laser instrument can also adopt a laser theodolite or a total station.

[0031] Wherein, the kiln body includes a plurality of cylinders 1, which are connected in sequence, and each cylinder 1 is provided with at least two Poitou supports 2, which are respectively arranged at the head and tail ends of the cylinder 1, and a central circular hole 25 is opened at the geometric center of each Poitou support 2, and the central circular hole 25 penetrates the Poitou support 2 along the center line direction of the cylinder 1; the Poitou support 2 is arranged to avoid deformation of the cylinder 1.

[0032] Specifically, the outer wall of the cross-shaped support 2 is connected to the inner peripheral wall of the cylinder 1 to prevent the cylinder 1 from being deformed.

[0033] It should be noted that if the center circular hole 25 is not provided at the factory, the center circular hole 25 needs to be provided at the geometric center of the Pozigzag support 2 by itself.

[0034] Furthermore, in the present embodiment, the cross-shaped support 2 comprises an octagonal connecting plate 21, a horizontal strut 22, two oppositely arranged vertical struts 23 and four inclined struts 24. The horizontal strut 22 is mounted on the octagonal connecting plate 21, the horizontal strut 22 is connected to the octagonal connecting plate 21, the two vertical struts 23 are respectively arranged at the top and bottom ends of the octagonal connecting plate 21, the ends of the four inclined struts 24 are all connected to the outer wall of the octagonal connecting plate 21, and the four inclined struts 24 are arranged at circumferential intervals around the octagonal connecting plate 21; a through hole is opened at the geometric center position of the octagonal connecting plate 21, a through hole is opened at the middle position of the horizontal strut 22 extending along the center line direction thereof, the through hole passes through the horizontal strut 22, the through hole is arranged corresponding to the through hole, and the through hole is connected to the through hole to form a central circular hole 25.

[0035] Specifically, Figure 3 Taking the shown orientation as an example, the bottom end of the vertical strut 23 located at the upper part is connected to the top end of the octagonal connecting plate 21, the top end of the vertical strut 23 located at the lower part is connected to the bottom end of the octagonal connecting plate 21, the rear side of the horizontal strut 22 is connected to the front side of the octagonal connecting plate 21, the center line of the horizontal strut 22 is arranged parallel to the octagonal connecting plate 21, the four inclined struts 24 correspond to the four inclined surfaces of the octagonal connecting plate 21 respectively, and the ends of the four inclined struts 24 are connected to the four inclined surfaces of the octagonal connecting plate 21 respectively. During use, the free ends of the four inclined struts 24, the free ends of the two vertical struts 23 and the two free ends of the horizontal strut 22 all abut against the inner circumferential wall of the cylinder 1.

[0036] The center line of the through hole and the center line of the via hole are both arranged colinearly with the center line of the cylinder 1 .

[0037] Further, in this embodiment, S101, using a laser instrument to determine the center points of both ends of the kiln body, and measuring the center moments of the laser points at both ends of the kiln body, includes:

[0038] S1011. Set up a platform outside the front or rear end of the kiln body, and install the laser instrument on the platform.

[0039] Specifically, a platform is set up outside the head end or the tail end of the kiln body for the laser instrument to emit laser 3.

[0040] S1012. Place a mark plate on the center circular hole 25 of the first and last rice support in the kiln body, check whether the laser point emitted by the laser instrument is located at the center of the center circular hole 25. If the laser point is not located at the center of the center circular hole 25, adjust the laser point to the center of the center circular hole 25 of the first and last rice support in the kiln body, and fix the laser instrument.

[0041] Specifically, the laser 3 is shot from one end of the kiln body to the other end, and when the laser points at the first and last sections of the kiln body are both at the center of the cylinder 1, they are the concentricity marks; wherein, the center distance of the laser points of the first and last Mi-shaped supports 2 of the kiln body is measured (that is, the distance from the laser point to the inner surface of the kiln body, generally in the four directions of up, down, left and right), and the position of the laser 3 is adjusted to make the center distance data of the laser points at the first and last ends of the kiln body consistent, that is, when the laser point is at the center of the center circular hole 25 of the first and last Mi-shaped supports in the kiln body, the path of the laser 3 is the concentricity reference line of the kiln body.

[0042] When the laser point is at the center of the central circular hole 25 of the first and last two rice support in the kiln body, the center distances of the laser points at the first and last ends of the kiln body are both equal to the radius of the cylinder 1.

[0043] S102. Use a laser instrument to measure the center distances of N middle points to be measured in the middle section of the kiln body, where N is a natural number greater than 1.

[0044] It should be noted that the selection of N middle points to be measured is as follows: generally, the cross-shaped supports 2 are set at the front and rear ends of each section of the cylinder 1, so the center distance of the laser point at each cross-shaped support 2 can be measured, that is, each cross-shaped support 2 is the middle point to be measured, and the number of cross-shaped supports 2 in the middle section of the kiln body is basically consistent with the number of middle points to be measured.

[0045] Among them, S102, using a laser instrument to measure the center distance of N middle points to be measured in the middle section of the kiln body, including:

[0046] S1021. Place the target plate on the cross-shaped support 2 of one of the middle points to be measured to find the laser point, measure the center moment of the laser point on the cross-shaped support 2 of the middle point to be measured, and measure at least four center distance data values ​​at the cross-shaped support 2 of the middle point to be measured.

[0047] It should be noted that the measurement method of the central moment of each intermediate point to be measured is the same as the measurement method of the central moment of the laser points at the two ends of the kiln body in S101 (that is, the center points of the two ends of the kiln body).

[0048] Specifically, after the laser 3 is stabilized, the staff places the mark plate at the laser position of one of the middle points to be measured. The mark plate is used to find the laser point so as to measure the center distance of the middle point to be measured, that is, the shortest distance from the laser point on the cross support 2 of the middle point to be measured to the inner surface of the kiln body. At least four center distance data values ​​are measured at the cross support 2 of the middle point to be measured for comparison with the center moment data values ​​of the laser points at the two ends of the kiln body.

[0049] Furthermore, in this embodiment, a reference plate is placed on the cross-shaped support 2 at the middle point to be measured to find the laser point, including: the laser 3 passes through the central circular holes 25 on multiple cross-shaped supports 2 in sequence and is projected onto the reference plate on the cross-shaped support 2 at the middle point to be measured to form a laser point.

[0050] S1022. After one intermediate point to be measured is measured and recorded, the mark plate is removed and used for measuring the next intermediate point to be measured.

[0051] Specifically, the center distance data values ​​of the two ends of the kiln body have been determined and the laser 3 is not moved. After the measurement and recording of each intermediate point to be measured are completed, the mark plate is removed for the measurement of the next intermediate point to be measured. Due to the removal of the mark plate and the existence of the central circular hole 25 of the cross support 2, the laser 3 will penetrate the kiln body without obstruction.

[0052] Among them, when measuring N intermediate points to be measured, staff are reserved at both ends of the kiln body to check whether the laser points at the both ends of the kiln body move before measuring each intermediate point to be measured; such setting ensures that the benchmark is correct.

[0053] S103, comparing the center distance data values ​​of the laser points at the middle points to be measured in the middle section of the kiln body with the center moment data values ​​of the laser points at the two ends of the kiln body one by one to obtain the concentricity between the middle section of the kiln body and the two ends of the kiln body; in this way, it can be determined whether the kiln body is concentric with the beginning and end of the kiln body, which improves the work efficiency and accuracy of the concentricity measurement compared with the traditional measurement method.

[0054] The present application provides a method for measuring the concentricity of a rotary kiln, comprising the following steps: using a laser instrument to determine the center points of both ends of a kiln body, and measuring the center moments of the laser points at the both ends of the kiln body, wherein the center moment is the distance from the laser point at the measuring position to the inner surface of the kiln body; using the laser instrument to measure the center distances of N to-be-measured middle points in the middle section of the kiln body, wherein N is a natural number greater than 1; comparing the center distance data values ​​of the laser points at each to-be-measured middle point in the middle section of the kiln body with the center moment data values ​​of the laser points at both ends of the kiln body one by one to obtain the concentricity; such an arrangement improves the work efficiency and accuracy of the concentricity measurement compared with the traditional measurement method.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0056] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A method for measuring the concentricity of a rotary kiln, characterized in that: The steps include: Using a laser instrument to determine the center points of both ends of the kiln body, and measuring the center moments of the laser points at both ends of the kiln body, wherein the center moment is the distance from the laser point at the measuring position to the inner surface of the kiln body; The laser instrument is used to measure the center distances of N middle points to be measured in the middle section of the kiln body, wherein N is a natural number greater than 1; The center distance data values ​​of the laser points at each middle point to be measured in the middle section of the kiln body are compared one by one with the center moment data values ​​of the laser points at the two ends of the kiln body to obtain the concentricity between the middle section of the kiln body and the two ends of the kiln body.

2. The method for measuring the concentricity of a rotary kiln according to claim 1, characterized in that: The kiln body comprises a plurality of cylinders, which are connected in sequence, each of which is provided with at least two cross-shaped supports, which are respectively arranged at the head and tail ends of the cylinder, and a central circular hole is opened at the geometric center of each cross-shaped support, which penetrates the cross-shaped support along the center line direction of the cylinder.

3. The method for measuring the concentricity of a rotary kiln according to claim 2, characterized in that: The cross-shaped support comprises an octagonal connecting plate, a horizontal support rod, two vertical support rods arranged opposite to each other, and four inclined support rods. The horizontal support rod is erected on the octagonal connecting plate, the horizontal support rod is connected to the octagonal connecting plate, the two vertical support rods are respectively arranged at the top and bottom ends of the octagonal connecting plate, the ends of the four inclined support rods are all connected to the outer side wall of the octagonal connecting plate, and the four inclined support rods are arranged at intervals around the circumference of the octagonal connecting plate. A through hole is provided at the geometric center position of the octagonal connecting plate, and a through hole is provided at the middle position of the horizontal support rod extending along the center line direction thereof, the through hole passes through the horizontal support rod, the through holes are arranged correspondingly to each other, and the through holes are connected to each other to form the central circular hole.

4. The method for measuring the concentricity of a rotary kiln according to claim 2, characterized in that: The method of using a laser instrument to determine the center points of the two ends of the kiln body and measuring the center moments of the laser points at the two ends of the kiln body includes: A platform is set up outside the front end or the rear end of the kiln body, and the laser instrument is installed on the platform; A mark plate is placed on the central circular holes of the first and last rice support in the kiln body to check whether the laser point emitted by the laser instrument is located at the center of the central circular hole. If the laser point is not located at the center of the central circular hole, the laser point is adjusted to the center of the central circular holes of the first and last rice support in the kiln body, and the laser instrument is fixed.

5. The method for measuring the concentricity of a rotary kiln according to claim 3, characterized in that: When the laser point is at the center of the central circular holes of the first and last two rice support members in the kiln body, the laser path is the kiln body concentricity reference line.

6. The method for measuring the concentricity of a rotary kiln according to claim 3, characterized in that: When the laser point is at the center of the central circular hole of the first and last rice support in the kiln body, the center distances of the laser points at the first and last ends of the kiln body are both equal to the radius of the cylinder.

7. The method for measuring the concentricity of a rotary kiln according to claim 3, characterized in that: The method of using the laser instrument to measure the center distances of N middle points to be measured in the middle section of the kiln body includes: Placing the target plate on one of the cross-shaped supports of the intermediate point to be measured to find the laser point, measuring the center moment of the laser point on the cross-shaped support of the intermediate point to be measured, and measuring at least four center distance data values ​​at the cross-shaped support of the intermediate point to be measured; After one of the intermediate points to be measured is measured and recorded, the target plate is removed and used for measuring the next intermediate point to be measured.

8. The method for measuring the concentricity of a rotary kiln according to claim 7, characterized in that: Placing the target plate on the crossbar support at the middle point to be measured to find the laser point includes: The laser sequentially passes through the central circular holes on the plurality of the '-shaped supports and is projected onto the target plate on the '-shaped support at the middle point to be measured to form a laser spot.

9. The method for measuring the concentricity of a rotary kiln according to claim 8, characterized in that: When measuring N intermediate points to be measured, staff are reserved at both ends of the kiln body to check whether the laser points at the both ends of the kiln body move before measuring each intermediate point to be measured.

10. The method for measuring the concentricity of a rotary kiln according to claim 1, characterized in that: The laser instrument adopts a level.

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