JP6135148B2 - Wear amount measuring device of pulverized coal burner - Google Patents

Description

  The present invention relates to a wear amount measuring device for a pulverized coal burner that measures the wear of wear-resistant components provided on the inner surface of a nozzle of a pulverized coal burner that is provided on a wall surface of a boiler furnace and burns pulverized coal.

  In a conventional pulverized coal burner, a pulverized coal mixed flow in which pulverized coal and a carrier medium are mixed is introduced into the nozzle from a tangential direction, and the pulverized coal mixed flow is ejected from the tip of the nozzle while swirling. For this reason, a liner which is a wear-resistant component is provided on the inner surface of the nozzle to prevent the inner surface of the nozzle from being worn by the swirling pulverized coal mixed flow.

  Since the liner is gradually worn by long-time operation of the pulverized coal burner, it is necessary to periodically repair the welded portion, such as performing overlay welding. At the time of inspection of the pulverized coal burner, the operator measured the amount of wear of the liner by visual inspection or palpation, and locally measured the amount of wear of the liner by a wall thickness measuring instrument.

  However, measurement of the amount of wear by visual inspection and palpation is qualitative and cannot be quantitatively evaluated, so even if the same amount of wear has occurred, the operator determines whether the liner needs to be repaired. There was a fear that it was different. There is also a method for quantitatively measuring the wear amount using a thickness measuring instrument similar to a caliper. However, it is difficult to measure the wear amount with the thickness measuring instrument in the entire area of the liner. Furthermore, since the operator has to look into the nozzle, the working posture is poor and workability is poor.

  In Patent Document 1, a wear-resistant component is replaced with a mounting bracket in advance to a reference depth such as a reference, and the degree of wear of the wear-resistant component is determined based on the appearance of the embedded bracket on the surface. A structure and method for determining the thickness of wear resistant parts is disclosed.

JP-A-2005-43279

  In view of such circumstances, the present invention provides an apparatus for measuring the amount of wear of a pulverized coal burner that measures the inner diameter of the nozzle of the pulverized coal burner and enables quantitative evaluation of the amount of wear of wear-resistant parts.

  The present invention is a wear amount measuring device for measuring the wear amount of wear-resistant parts provided on the inner surface of a nozzle of a pulverized coal burner, and is attached to the base end of the nozzle so that its center coincides with the axis of the nozzle. A centering plate, a slide shaft that passes through the center of the centering plate and is capable of moving back and forth in the axial direction of the nozzle, and a measuring instrument for measuring the inner surface shape of the wear-resistant component provided at the tip of the slide shaft And a control unit, the control unit having initial data of the inner shape of the wear-resistant component in a state without wear, the inner shape of the wear-resistant component measured by the measuring instrument, and the initial value The present invention relates to a wear amount measuring device for a pulverized coal burner that compares the data and measures the wear amount of the wear-resistant parts.

  Further, in the present invention, the slide shaft is rotatable, the measuring device is a laser length measuring device, is irradiated with a laser beam toward the inner surface of the wear-resistant component, and is rotated at an arbitrary position. The controller can measure the distance to the inner surface of the wear-resistant component, and the control unit can determine the wear-resistant component based on the rotation amount of the slide shaft and the distance to the inner surface of the wear-resistant component measured by the measuring instrument. The present invention relates to an apparatus for measuring the amount of wear of a pulverized coal burner that measures the amount of wear.

  According to the present invention, the slide shaft is rotatable, the measuring instrument is perpendicular to the axis of the slide shaft and is urged toward the inner surface of the wear-resistant component, and a tip of the measurement rod. And a roller that rolls on the inner surface of the wear-resistant component, and the measuring device moves to the inner surface of the wear-resistant component by the displacement of the measuring rod when the roller rolls on the inner surface of the wear-resistant component. The control unit measures the amount of wear of the wear-resistant component based on the amount of rotation of the slide shaft and the distance to the inner surface of the wear-resistant component measured by the measuring instrument. The present invention relates to a wear amount measuring apparatus.

  According to the present invention, the measuring device emits a laser beam, a conical mirror that reflects the laser beam toward the entire circumference and irradiates the inner surface of the wear-resistant component, and irradiates the inner surface of the wear-resistant component. And a camera that captures the formed projection image, and the control unit wears the pulverized coal burner that measures the wear amount of the wear-resistant component based on the image data of the projection image photographed by the camera. It concerns a measuring device.

  In the present invention, the slide shaft is displaced at an arbitrary pitch in the axial direction and measured at each displaced position, and the control unit measures the measured distance to the inner surface of the wear-resistant component, and the measuring device. A wear amount measuring apparatus for a pulverized coal burner that creates three-dimensional data of the entire inner surface of the wear-resistant component based on the position in the axial direction and creates a three-dimensional image of the inner surface of the wear-resistant component based on the three-dimensional data. It is concerned.

  Furthermore, according to the present invention, the control unit acquires the projected image at an arbitrary pitch in the axial direction, arranges the obtained projected images at an arbitrary pitch, combines them, and The present invention relates to a wear amount measuring apparatus for a pulverized coal burner that creates a stereoscopic image.

  According to the present invention, there is provided a wear amount measuring device for measuring the wear amount of a wear resistant part provided on the inner surface of a nozzle of a pulverized coal burner, wherein the center of the base end of the nozzle coincides with the axis of the nozzle. An attached alignment plate, a slide shaft that passes through the center of the alignment plate and can be advanced and retracted in the axial direction of the nozzle, and an inner surface shape of the wear-resistant component provided at the tip of the slide shaft are measured. A measuring device and a control unit, the control unit having initial data of the inner shape of the wear-resistant component in a state without wear, and the inner shape of the wear-resistant component measured by the measuring device; Compared with the initial data, the wear amount of the wear-resistant component is measured, so that the wear amount of the wear-resistant component can be quantitatively measured, and the wear of the wear-resistant component can be visually or palpated by an operator. Since it is not necessary to judge the amount, It prevents variations in the determination of whether the repair 耗部 products, there is exhibited an excellent effect that it is possible to standardize the repair work.

It is a schematic sectional drawing which shows the pulverized coal burner to which the measuring apparatus which concerns on the Example of this invention is applied. It is a principal part enlarged view which shows the measuring apparatus which concerns on 1st Example of this invention. It is a principal part enlarged view which shows the measuring apparatus which concerns on the 2nd Example of this invention. It is a principal part enlarged view which shows the measuring apparatus which concerns on the 3rd Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a pulverized coal burner in which the present invention is implemented will be described with reference to FIG.

  In FIG. 1, reference numeral 1 denotes a furnace, and 2 denotes a furnace wall of the furnace 1. A throat 3 is provided on the furnace wall 2, and a nozzle body 4 is provided concentrically with the throat 3.

  The nozzle body 4 includes an outer cylinder nozzle 6 and an inner cylinder nozzle 7 provided concentrically, and the base ends of the outer cylinder nozzle 6 and the inner cylinder nozzle 7 are fitted in the outer cylinder nozzle 6 by an inlay method. The end plate 7a is closed by a mating end plate 7a. The end plate 7a is formed at the base end of the outer cylinder nozzle 6, and is detachably fixed to a flange 6a protruding to the outer peripheral side by a bolt.

  The outer cylinder nozzle 6 and the inner cylinder nozzle 7 each have a circular cross-sectional shape, and a space between the outer cylinder nozzle 6 and the inner cylinder nozzle 7 is a hollow cylindrical space between the ends of the furnace 1 side. A fuel conduction space 8 is formed in which is opened.

  A pulverized coal flow supply pipe 9 is connected to the outer cylinder nozzle 6 from a tangential direction at a base end portion (an end portion on the opposite side of the furnace 1, a left end portion in FIG. 1) of the outer cylinder nozzle 6. The pulverized coal flow supply pipe 9 is connected to a pulverized coal mill (not shown), and a pulverized coal mixed stream 11 in which a carrier medium (primary air) and pulverized coal are mixed through the pulverized coal flow supply pipe 9. Flows into the fuel conduction space 8 from the tangential direction.

  The pulverized coal mixed flow 11 flowing into the fuel conduction space 8 flows while swirling inside the fuel conduction space 8 and is ejected from the tip of the fuel conduction space 8 into the furnace 1. .

  A wind box 12 that holds the nozzle body 4 is provided on the side of the furnace wall 2 opposite to the furnace 1, and the wind box 12 surrounds the tip of the nozzle body 4 (end on the furnace 1 side). A secondary air adjusting device 13 is provided, and secondary air (combustion air) 14 introduced into the window box 12 by the secondary air adjusting device 13 is ejected from the outer peripheral side of the outer cylinder nozzle 6. It has become like that.

  An oil burner 15 is provided on the center line of the inner cylinder nozzle 7 so as to penetrate the end plate 7a, and a part of the secondary air 14 introduced from the wind box 12 or outside air is transferred to the inner cylinder. The interior of the nozzle 7 circulates as tertiary air (auxiliary combustion air) 16.

  Further, the inner surface of the outer cylinder nozzle 6 is provided with a liner 18 as a wear-resistant part made of wear-resistant steel or the like covering the entire circumference from the base end to the middle part, and by providing the liner 18, The inner surface of the outer cylinder nozzle 6 is prevented from being worn by the pulverized coal mixed flow 11 swirling in the fuel conduction space 8.

  However, it is inevitable that the liner 18 is also worn, and repair is performed according to the progress of wear. As repair, first, the amount of wear and the range of wear are measured, and a metal equivalent to the liner 18 is built up, or a plate piece filling the worn range is welded. The wear state is measured by a wear amount measuring device 21 described later.

  Next, with reference to FIG. 2, the wear amount measuring apparatus 21 according to the first embodiment of the present invention will be described.

  The wear amount measuring device 21 has a centering plate 22 that can be fitted to the base end of the outer cylinder nozzle 6 by an inlay method. The centering plate 22 can be attached to and detached from the flange 6 a, and the centering plate 22 is provided with a bearing 23 that penetrates the center of the centering plate 22.

  A slide bearing 24 is rotatably supported by the bearing 23, and a slide shaft 25 is supported by the slide bearing 24 so as to be able to advance and retreat and rotate integrally with the slide bearing 24. Is fitted to the outer cylinder nozzle 6, the axis of the slide shaft 25 coincides with the axis of the outer cylinder nozzle 6.

  A driven gear 26 is provided at the base end of the slide bearing 24, and the driven gear 26 is engaged with a drive gear 27. The drive gear 27 is fitted on the output shaft of a drive motor 28 as a rotational drive means. The drive motor 28 is attached to the centering plate 22, and the drive gear 27 is rotated by the drive motor 28, whereby the slide bearing 24 is rotated via the drive gear 27 and the slide shaft. 25 is rotated integrally with the slide bearing 24.

  The drive motor 28 is provided with required rotation detection means 29, and the rotation detection means 29 can detect the rotation angle of the slide shaft 25. As the rotation detection means 29, for example, a rotation angle can be detected by counting drive pulses, such as a stepping motor, or an encoder is provided to detect the rotation amount and rotation angle of the output shaft of the motor. Alternatively, an angle detector such as a potentiometer is connected to the output shaft of the motor to detect the rotation amount and rotation angle of the output shaft. Further, the position in the rotation direction is detected by detecting the rotation angle from the reference position.

  A cylinder 31 as a straight drive means is attached to the centering plate 22 in parallel with the slide shaft 25. A transmission plate 32 is attached to the base end of the cylinder 31 and the base end of the slide shaft 25 so as to extend over the cylinder 31 and the slide shaft 25. By extending and contracting the cylinder 31, the transmission plate The slide shaft 25 is advanced and retracted integrally through 32.

  A sensor capable of detecting the amount of expansion / contraction of the cylinder 31, for example, a linear displacement detection means 33 such as a linear scale is attached to the cylinder 31. The linear displacement detection means 33 can detect the advance / retreat amount of the slide shaft 25, and the position in the advance / retreat direction of the slide shaft 25, for example, the base end of the outer cylinder nozzle 6, based on the detected advance / retreat amount. Can be detected.

  A measuring means is provided at the tip of the slide shaft 25. As an example of the measuring means, a laser length measuring device 34 is used.

  The laser length measuring device 34 emits a laser beam 35, receives reflected light from the measurement point, and measures the distance to the measurement point. In this embodiment, the laser length measuring device 34 A laser beam 35 is emitted in a direction (radial direction) perpendicular to the axis of the slide shaft 25, and a point on the liner 18 irradiated by the laser beam 35 is used as a measurement point, and measurement is performed from the axis of the slide shaft 25. Ranging up to a point. The measured distance is output to the control unit 36.

  The rotation detector 29 and the linear displacement detector 33 constitute a displacement detector, and the amount of rotation and advance / retreat of the slide shaft 25 detected by the displacement detector, ie, the laser length measuring device 34. The rotation amount and the advance / retreat amount are also output to the control unit 36.

  The control unit 36 controls the driving of the drive motor 28 and the cylinder 31 and determines the measurement point based on the rotation amount detected by the rotation detection unit 29 and the advance / retreat amount detected by the linear displacement detection unit 33. The position within the inner surface of the liner 18 is calculated, and the inner diameter of each measurement point of the liner 18 can be measured based on the distance measured by the laser length measuring device 34.

  The rotation detection means 29 and the linear displacement detection means 33 are electrically connected to the control unit 36, and a cable connected to the laser length measuring device 34 passes through the slide shaft 25 and performs the control. Connected to the unit 36. The distance measurement results by the laser length measuring device 34 and the detection results of the rotation detection means 29 and the linear displacement detection means 33 are input to the control unit 36, respectively. The controller 36 may be manufactured for the wear amount measuring device 21 or a general-purpose PC may be used as the controller 36.

  Thus, the irradiation direction of the laser beam 35 by the laser length measuring device 34 is detected by the rotation detecting means 29, and the position in the axial direction is detected by the linear displacement detecting means 33. Accordingly, the irradiation position of the laser beam 35, that is, the measurement point is specified in the liner 18 by the position in the irradiation direction and the axial direction.

  The measurement result of the laser length measuring device 34 is recorded in the storage unit 37 of the control unit 36 in association with the detection result of the rotation detection unit 29 and the detection result of the linear displacement detection unit 33.

  The control unit 36 controls the laser length measuring device 34, the drive motor 28, and the cylinder 31 so as to perform a required operation at a required timing.

  The storage unit 37 stores the inner surface shape of the liner 18 without wear as initial data. The initial data may be a design value or a value measured in a state before the pulverized coal burner is operated (a state where the pulverized coal burner is not worn). The control unit 36 compares the acquired inner surface shape of the liner 18 with the inner surface shape of the liner 18 stored in the storage unit 37.

  Next, measurement of the wear amount of the liner 18 by the wear amount measuring device 21 will be described.

  When measuring the wear amount of the liner 18, first, the end plate 7 a, the inner cylinder nozzle 7, and the oil burner 15 are removed from the outer cylinder nozzle 6, and the centering is performed on the base end of the outer cylinder nozzle 6. The plate 22 is fitted. By fitting the centering plate 22, the axis of the slide shaft 25 coincides with the axis of the outer cylinder nozzle 6.

  Next, the cylinder 31 is driven, and the laser length measuring device 34 is moved to a predetermined position in the forward / backward direction, for example, to the tip of the liner 18. Further, the laser length measuring device 34 is moved at a predetermined pitch by the cylinder 31, and the drive motor 28 is driven for every pitch movement, and the laser length measuring device 34 is moved at a predetermined angle pitch via the slide shaft 25. The laser beam 35 is emitted intermittently at each angular position, and the distance to the liner 18 is measured. When the measurement of the entire circumference is completed, the pitch is moved by the cylinder 31, and the measurement of the entire circumference is performed at that position. Thus, each time the pitch is moved, the laser length measuring device 34 is rotated all around, and the distance to the liner 18 is sequentially measured, thereby measuring the inner shape of the liner 18 at a predetermined position in the advancing / retreating direction. can do.

  By comparing the measured inner surface shape of the liner 18 with the inner surface shape (initial data) of the liner 18 without wear at the same advance / retreat position stored in the storage unit 37, a predetermined position in the advance / retreat direction is obtained. In this case, it is possible to quantitatively measure and evaluate which part of the liner 18 is worn in the rotational direction.

  Similarly, by sequentially comparing the measured value and the initial data at different positions in the forward and backward directions, the inner surface shape of the liner 18 can be measured over the entire length, and the wear amount over the entire circumference of the liner 18 can be measured. It can be measured and evaluated quantitatively.

  Accordingly, when the pulverized coal burner is inspected, it is not necessary for the operator to judge the amount of wear of the liner 18 by visual or palpation. Therefore, it is possible to prevent variation in judgment as to whether or not the liner 18 can be repaired, and repair work can be performed. You can determine the criteria for doing this.

  The measuring means is not limited to the laser length measuring instrument 34. For example, a contact-type measuring means may be used. With reference to FIG. 3, a second embodiment in which an example of a contact-type measuring means is used will be described. In FIG. 3, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

  In the second embodiment, a measuring instrument 38 is provided at the tip of the slide shaft 25. The measuring instrument 38 includes a measuring rod 39 orthogonal to the axis of the slide shaft 25 and a roller 40 provided at the tip of the measuring rod 39 and parallel to the axis of the slide shaft 25.

  The measuring rod 39 is displaceable in the axial direction, and the roller 40 is biased toward the liner 18 by a spring or the like (not shown). The roller 40 rolls in the circumferential direction and the circumferential direction of the liner 18. It is free. The measuring device 38 measures the distance from the slide shaft 25 to the liner 18 by detecting the amount of displacement of the measuring rod 39.

  When measuring the wear amount of the liner 18 by the wear amount measuring device 21 in the second embodiment, the centering plate 22 is fitted to the outer cylinder nozzle 6 to align the slide shaft 25. After that, the cylinder 31 is driven to move the measuring device 38 to a predetermined position.

  Next, by driving the drive motor 28 and rotating the measuring instrument 38 via the slide shaft 25, the roller 40 rolls along the liner 18, and the measuring rod 39 moves to the liner 18. It is displaced in the axial direction according to the unevenness.

  Based on the amount of rotation detected by the rotation detecting means 29 and the distance to the liner 18 measured by the measuring device 38, the control unit 36 determines the inner shape of the liner 18 at a predetermined position in the forward / backward direction. Can be measured.

  Thereafter, by comparing the measured inner surface shape of the liner 18 with the initial data stored in the storage unit 37, the amount of wear in the entire inner surface of the liner 18 can be quantitatively measured and evaluated.

  Next, with reference to FIG. 4, a wear amount measuring apparatus 21 according to a third embodiment of the present invention will be described. In the third embodiment, an optical wear amount measuring device 21 is used as the measuring means. In the third embodiment, the wear state of the inner surface of the liner 18 is measured by photogrammetry. 4 that are the same as those in FIG. 2 are given the same reference numerals, and descriptions thereof are omitted.

  In the third embodiment, a measuring instrument 41 is provided at the tip of the slide shaft 25. The measuring instrument 41 has a frame part 42 having a frame structure with an open peripheral surface.

  A laser emission source 43 is provided inside the tip of the slide shaft 25, and the frame portion 42 is provided at the tip of the slide shaft 25. A conical mirror 44 is provided in the middle of the frame portion 42 so as to face the laser emission source 43. The center line of the conical mirror 44 coincides with the optical axis of the laser light source 43, and the apex of the conical mirror 44 faces the laser light source 43.

  A camera (preferably a digital camera) 45 is provided at the tip of the frame portion 42, and the optical axis of the camera 45 coincides with the optical axis of the laser emission source 43.

  A laser beam 46 is emitted from the laser emission source 43, and the laser beam 46 is incident on the apex of the conical mirror 44, and is reflected by the conical mirror 44 so as to spread all around. Further, the reflected laser beam 46 irradiates the inner surface of the liner 18 and forms a ring-shaped projection image 47 reflecting the shape of the inner surface on the inner surface of the liner 18.

  The camera 45 has an angle of view capable of capturing the projection image 47. When the inner surface of the liner 18 is photographed by the camera 45, an image in which a circle (projected image 47) centering on the axis of the outer cylinder nozzle 6 appears can be acquired.

  When the wear amount of the liner 18 is measured by the wear amount measuring device 21 in the third embodiment, the centering plate 22 is fitted to the outer cylinder nozzle 6 and the slide shaft 25 is moved. After the alignment, the cylinder 31 is driven to move the measuring instrument 41 to a predetermined position.

  Next, the laser beam 46 is emitted from the laser emission source 43. The emitted laser beam 46 is incident on the apex of the conical mirror 44 and diffusely reflected by the conical surface of the conical mirror 44 in the entire circumferential direction and in the direction perpendicular to the axis of the conical mirror 44. The reflected laser beam 46 passes through the frame portion 42 and is emitted all around.

  The laser beam 46 emitted all around is irradiated on the inner surface of the liner 18 to form the projected image 47 reflecting the shape of the inner surface, and the projected image 47 is captured by the camera 45 to obtain image data. To do.

  In addition, by moving the cylinder 31 at every predetermined step and taking an image with the camera 45 each time the cylinder 31 is moved, an image showing the wear state of the entire length of the liner 18 can be acquired. The control unit 36 can measure the diameter and shape of the projection image 47 based on the acquired image data of the projection image 47, thereby measuring the inner surface shape of the liner 18 at a predetermined position in the forward / backward direction. it can.

  Further, the control unit 36 displays the reference circle and the projected image 47 after wear on the same image by superimposing the reference circle obtained from the initial data on the image acquired at each position by the camera 45. Is done. The amount of wear can be measured by comparing the point of the reference circle intersecting on the same radius with the point of the projected image 47. The position (radius) of an arbitrary point on the projected image 47 is calculated from the image, the position obtained by the calculation is compared with the position obtained from the initial data, and the wear amount may be obtained by calculation. .

  As for the position of the measurement point, the angle (circumferential position) and the radial position about the optical axis can be read from the image, and the position in the axial direction can be detected by the linear displacement detection means 33. it can. Therefore, it is possible to quantitatively measure and evaluate the wear amount of the liner 18 at an arbitrary position and an arbitrary part.

  Furthermore, in the third embodiment, the projection image 47 acquired at a predetermined pitch in the axial direction can be synthesized by arranging and arranging the projected image 47 at a predetermined pitch in the axial direction. The wear state of the liner 18 can be visually confirmed.

  In the third embodiment, since the shape of the inner surface of the liner 18 is measured based on the laser beam 46 irradiated on the entire circumference, the mechanism for rotating the slide shaft 25 and the slide shaft are measured. A mechanism for detecting the rotation of 25 is not required, and the manufacturing cost can be reduced.

  In the first and second embodiments, the storage portion 37 stores the shape of the inner surface of the liner 18 without wear as three-dimensional data, and the slide shaft 25 is displaced at a predetermined pitch in the axial direction. Then, three-dimensional data of the entire inner surface of the liner 18 may be created based on the distance to the liner 18 measured for each displaced position and the positions of the laser length measuring device 34 and the measuring device 38. By comparing the three-dimensional data stored in the storage unit 37 with the created three-dimensional data, the wear amount of the liner 18 can be obtained quantitatively. In addition, a three-dimensional image of the inner surface of the liner 18 can be created based on the three-dimensional data, and the wear location and the degree of wear of the liner 18 can be easily recognized visually by superimposing the three-dimensional images. Can do.

  Also, in the first to third embodiments, when there is no data on the inner surface shape of the liner 18 in a state without wear, such as an existing pulverized coal burner, the design value of the inner diameter of the outer cylinder nozzle 6 is set. The wear amount may be measured based on the basis. At this time, it is desirable to evaluate the wear amount of the liner 18 with a margin corresponding to an error between the design value and the actual measurement value.

  Further, in the first to third embodiments, the case where the outer cylinder nozzle 6 is circular has been described. However, the outer cylinder nozzle 6 does not have to be circular, for example, a rectangular nozzle whose dimensions are known. However, it goes without saying that the wear amount measuring device 21 of the present invention is applicable.

  The rotation of the slide shaft 25 and movement in the axial direction may be performed manually by an operator.

4 Nozzle body 6 Outer cylinder nozzle 7 Inner cylinder nozzle 11 Pulverized coal mixed flow 14 Secondary air 18 Liner 21 Wear amount measuring device 22 Centering plate 25 Slide shaft 28 Drive motor 29 Rotation detection means 31 Cylinder 33 Linear displacement detection means 34 Laser Length measuring device 35 Laser beam 36 Control unit 37 Storage unit 38 Measuring device 39 Measuring rod 40 Roller 41 Measuring device 43 Laser emission source 44 Conical mirror 45 Camera 46 Laser beam 47 Projected image

Claims (6)

A wear amount measuring device for measuring the wear amount of a wear-resistant component provided on the inner surface of a nozzle of a pulverized coal burner, which is detachable from the base end of the nozzle and is fitted to the base end of the nozzle by an inlay method and the centering plate that, with a through the center of the core combined plate can advance and retreat in the axial direction of the nozzle, the axis of the nozzle axis by engagement between the centering plate and the base end of the nozzle A slide shaft that coincides with the core, a measuring instrument that is provided at a tip of the slide shaft and measures an inner surface shape of the wear-resistant component, and a control unit, and the control unit has no wear. A fine powder characterized in that the initial data of the inner surface shape of the wear-resistant part is compared with the initial data and the wear amount of the wear-resistant part is measured. An apparatus for measuring the wear amount of charcoal burners.   The slide shaft is rotatable, and the measuring instrument is a laser length measuring device, which irradiates a laser beam toward the inner surface of the wear-resistant component and rotates the slide shaft at the arbitrary position of the wear-resistant component. The controller can measure the wear amount of the wear-resistant component based on the rotation amount of the slide shaft and the distance to the inner surface of the wear-resistant component measured by the measuring instrument. The wear amount measuring apparatus for a pulverized coal burner according to claim 1.   The slide shaft is rotatable, and the measuring device is provided with a measuring rod that is perpendicular to the axis of the slide shaft and is biased toward the inner surface of the wear-resistant component, and the wear-resistant provided at the tip of the measuring rod. A roller that rolls on the inner surface of the component, and the measuring instrument measures the distance to the inner surface of the wear-resistant component by the displacement of the measuring rod when the roller rolls on the inner surface of the wear-resistant component. The wear of the pulverized coal burner according to claim 1, wherein the control unit measures the wear amount of the wear-resistant component based on the rotation amount of the slide shaft and the distance to the inner surface of the wear-resistant component measured by the measuring instrument. Quantity measuring device.   The measuring device includes a light emitting unit that emits a laser beam, a conical mirror that reflects the laser beam toward the entire circumference and irradiates the inner surface of the wear-resistant component, and a projection formed by irradiating the inner surface of the wear-resistant component. The wear amount measurement of the pulverized coal burner according to claim 1, wherein the control unit measures the wear amount of the wear resistant part based on image data of a projection image taken by the camera. apparatus.   The slide shaft is displaced at an arbitrary pitch in the axial direction and measured at each displaced position, and the control unit measures the measured distance to the inner surface of the wear-resistant component and the position of the measuring device in the axial direction. The amount of wear of the pulverized coal burner according to claim 2 or 3, wherein three-dimensional data of the entire inner surface of the wear-resistant component is created based on the three-dimensional data, and a three-dimensional image of the inner surface of the wear-resistant component is created based on the three-dimensional data. measuring device.   The control unit obtains the projected image at an arbitrary pitch in the axial direction, and arranges and combines the obtained projected images at an arbitrary pitch to create a three-dimensional image of the inner surface of the wear-resistant component. Item 4. An apparatus for measuring the amount of wear of a pulverized coal burner according to Item 4.

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