A method and measuring instrument for detecting the center line of a static cooling rotary kiln cylinder

Abstract

The invention discloses a detection method and measuring instrument for the center line of a static cooling rotary kiln cylinder. An adsorbed equal-diameter double-wheel level measuring instrument (14) is installed directly below each retaining wheel belt. The level measuring instrument is moved in the horizontal direction so that the electronic level (7) installed thereon displays ≤±0.001, and the precise position of the center point of the bottom of each wheel belt is quickly found; then a total station (4) is used to observe two square targets (5) at the head and tail positions in the vertical plane of the X-axis line, and at the same time, the total station is used to observe the center points of the circular targets (9) of the double-wheel level measuring instrument adsorbed by the bottom of two or three wheel belts, that is, the three-dimensional coordinate parameters of the center point of the bottom of each wheel belt are determined. The invention has a simple measurement principle and is easy to operate on site. It can be conveniently operated by ordinary technicians of a cement production company, and the measurement work can be completed quickly, accurately and reliably, and the measurement result of the kiln center line can be obtained immediately, saving measurement time and cost.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring a stationary cold rotating body, and in particular relates to a detection method and a measuring instrument for a center line of a stationary cold rotary kiln. Background Art

[0002] The rotary kiln is a key firing equipment in the production of cement, metallurgy, chemical industry, refractory materials, etc. The kiln is generally supported by more than three sets of supporting wheels for continuous operation. In long-term operation, due to the uneven wear of the supporting wheels and wheel tyres, thermal deformation of various parts of the kiln, and uneven settlement of the kiln base pier, the operating axis of the rotary kiln is not a straight line. This phenomenon will cause periodic deformation of the cylinder. This deformation will affect the transmission meshing of the kiln's large gear ring and damage the kiln lining and cylinder, causing kiln mechanical failure and kiln shutdown accidents. Therefore, it is necessary to measure and calibrate the center line of the rotary kiln. Measuring the center line of a cold rotary kiln in a static state is one of the important tasks of measuring the center line of a rotary kiln. The current mainstream method for measuring the center line of a static cold kiln is generally to measure outside the kiln. See Figure 1 It is to determine two reference vertical planes and rectangular coordinate systems parallel to the kiln axis on both sides of the rotary kiln shell 2 generatrix. At both sides of the belt 1 of each kiln setting Xi, the horizontal distances di and di′ to the two reference vertical planes are measured using instruments such as a total station. In addition, it is also necessary to Figure 2 and Figure 4 As shown in the figure, the vertical height Zi (= Z Ri +ΔZ R ) That is, three coordinate parameters need to be accurately measured at one position of each wheel belt, and finally the axis coordinate parameters of the rotary kiln cylinder are calculated according to the relevant geometric formula. Generally, the measurement task of the center line of a three-speed static rotary kiln is completed by a professional kiln measurement company or institution, which takes about 2 days of work. The existing method for measuring the center line of a static cold rotary kiln has the following technical problems:

[0003] (1) The steps and operation of the measurement method are relatively complicated. It is necessary to find the horizontal diameter line position of the two sides of each retaining wheel belt 1 (such as Figure 2 (as shown in the figure) in order to determine the horizontal distances di and di′ from the two reference vertical planes to the wheel rim. However, due to deformation and measurement technology problems, the positions of the horizontal diameter lines on the surfaces on both sides are difficult to determine. The entire measurement work requires about 2 days of kiln shutdown.

[0004] (2) Due to the deviation and deformation of the kiln centerline, the position of the horizontal diameter line on both sides of the surface is difficult to determine. The technicians of the cement production company cannot complete the above measurement work by themselves, and need to pay 50,000 to 80,000 yuan to ask a professional kiln measurement company to implement it. The cost is relatively high, and the labor cost and time cost of the detection technology are relatively high. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a detection method and a measuring instrument for the center line of a static cooling rotary kiln in view of the shortcomings of the existing measurement technical methods. The measurement principle is simple and easy for ordinary technicians to operate on-site. It can be conveniently operated by cement company personnel themselves, and the measurement work can be completed quickly, accurately and reliably. The measurement results of the kiln center line can be obtained immediately, saving measurement time and cost.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An equal-diameter double-wheel level measuring instrument (14), characterized by comprising:

[0008] A U-shaped beam (11) base comprises a horizontal bottom surface and a vertical surface arranged vertically upward from the horizontal midline of the horizontal bottom surface to form a T-shaped cross section, wherein the vertical surface has two U-shaped arms symmetrical with respect to the midline in the depth direction of the horizontal bottom surface;

[0009] Two double wheel bearings (12) of equal diameter are symmetrically arranged on two arms of the U-shape of the vertical plane along the middle line in the depth direction, and the axes of the double wheel bearings (12) located on different arms are located at the same horizontal height, and the axes are parallel to the middle line, and the highest point of the outer diameter of each double wheel bearing (12) is higher than the top surface of the vertical plane;

[0010] An electronic level (7) is arranged on a middle line on one side of the horizontal bottom surface of the base of the U-shaped beam (11) divided by vertical surfaces;

[0011] The target assembly is located on the other side of the horizontal bottom surface of the U-shaped beam (11) base where the electronic level (7) is located, and includes a linear bearing seat (6) fixed on the middle line of the horizontal bottom surface, a rotating shaft (8) vertically installed in the linear bearing seat (6) and rotatable around its own axis, and a circular target (9) installed at a height of half the length of the rotating shaft (8); the target plane of the circular target (9) is located on the axis of the rotating shaft (8) and the mid-perpendicular line of the target plane is parallel to the axis of each double wheel bearing (12); the target plane of the circular target (9) can be rotated to be basically perpendicular to the total station (4) arranged outside the cylinder along the center line of the cylinder to be measured.

[0012] A first magnet (10) is mounted on the top of the rotating shaft (8) and is used to stably adsorb on the surface of the bottom of the wheel belt (1) of the cylinder to be tested;

[0013] Four second magnets (13) are respectively adsorbed and installed on the outer sides of the double wheel bearings (12), and are used to stably adsorb the level measuring instrument 14 on the bottom of the wheel belt (1) of the cylinder to be measured through the four second magnets (13).

[0014] In the above technical solution, the electronic level (7) can be detachably fixed on the base of the U-shaped beam (11) so that it can be installed on the bases of the U-shaped beams (11) of three measuring instruments (14) in turn for use, so as to maintain the consistency of the accuracy of the electronic level (7), eliminate the overall system error, improve the accuracy of the overall measurement results, and save costs.

[0015] In the above technical solution, the first magnet (10) is a cylindrical magnet to adapt to the rotating shaft; the second magnet (13) is a rectangular magnet to adsorb the double wheel bearing (12). Of course, other magnets with shapes that are convenient for adsorption can also be used.

[0016] In the above technical solution, each wheel of the double wheel bearing (12) on the same arm of the base of the U-shaped beam (11) is axially symmetrically arranged relative to the horizontal center line of the horizontal bottom surface, and the axes of the two double wheel bearings (12) on different arms are axially symmetrically arranged relative to the center line in the depth direction of the horizontal bottom surface, and the spatial spacing is ≥200mm.

[0017] In the above technical solution, the highest point of the outer diameter of each double wheel bearing (12) is higher than the top surface of the vertical surface by ≥3 mm.

[0018] In the above technical solution, the total station is provided with a matching microcomputer system, and the microcomputer system is configured to selectively save, record, delete, and modify all measurement data of the total station; a computer program is stored in the microcomputer system, and the computer program is configured to:

[0019] When the wheel diameter D is manually input i , wheel tyre hot clearance ΔD i , the fixed height ΔZ from the top of the rotating shaft on the level measuring instrument (14) to the center of the circular target (9) R , the design slope a parameter of the rotary kiln, the computer program calculates each wheel belt X i The coordinates of the center point of the cylinder [Y i , Z i ] and [Y i平均 , Z i平均 ] and quickly get each wheel with X i The deviation value of the actual center point of the cylinder [ΔY i , ΔZ i ]:

[0020] The XYZ coordinates of the center point of the rotary kiln cylinder at the three wheel belts are:

[0021] [X 90i =X 90Ri , Y 90i =Y 90Ri , Z 90i =Z 90Ri +ΔZ R+(D i -ΔD i )×(cos a) / 2];

[0022] [X 180i =X 180Ri , Y 180i =Y 180Ri , Z 180i =Z 180Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0023] [X 270i =X 270Ri , Y 270i =Y 270Ri , Z 270i =Z 270Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0024] Y i平均 =(Y 0Ri +Y 90Ri +Y 180Ri +Y 270R ) / 4;

[0025] Z i平均 =(Z 0Ri +Z 90Ri +Z 180Ri ++Z 270Ri +) / 4+ΔZ R +(D i -ΔD i )×(cos a) / 2;

[0026] The kiln axial coordinate X is affected by the bending of the kiln shell. i No impact, so X i平均 =X Ri ;

[0027] Rotary kiln belt serial number i ≥ 3, in each X i There is a deviation between the actual center point of the wheel cylinder and its ideal straightness: ΔY i , ΔZ i .

[0028] The present invention also provides a method for detecting the center line of a static cooling rotary kiln cylinder, characterized in that the equal-diameter double-wheel level measuring instrument (14) is used in combination with a total station (4) for measurement, an adsorbed equal-diameter double-wheel level measuring instrument (14) is installed directly below each retaining wheel belt (1), the level measuring instrument (14) is moved in the horizontal direction of each retaining wheel belt, so that the electronic level (7) on the level measuring instrument (14) displays ≤±0.001, and the precise position of the center point of the bottom of each wheel belt is quickly found; then, the total station (4) is used to observe any two square targets (5) set at the first and last positions in the vertical plane determined by the X-axis line, and at the same time, the total station (4) is used to observe the center points of the circular targets (9) of the double-wheel level measuring instrument (14) adsorbed by the bottom of two or three wheel belts, that is, the three-dimensional coordinate parameters of the center points of the bottom of each wheel belt are determined.

[0029] In the above technical solution, an electronic level (7) is used, and the electronic level (7) is configured to be movably mounted on the base of the U-shaped beam (11) of the equal-diameter double-wheel level measuring instrument (14) adsorbed under each wheel belt for use. Once installed, the electronic level (7) remains stationary on the base until it is rotated to another U-shaped beam (11) base. Preferably, the electronic level (7) can be adsorbed and mounted on the middle line of the U-shaped beam (11) base by a magnet provided on the electronic level (7) itself.

[0030] In the above technical solution, the method for detecting the center line of the static cooling rotary kiln cylinder comprises the following steps:

[0031] S1: Establish a [Xi, Yi, Zi] rectangular coordinate system outside the rotary kiln, wherein the X axis is substantially parallel to the center line of the rotary kiln cylinder, and set a square target (5) at each of the first and last positions in the vertical plane determined by the X axis;

[0032] S2: Install an adsorption level measuring instrument (14) directly below each stop belt, move the electronic measuring instrument (14) in the horizontal direction of each stop belt so that the electronic level (7) on it displays ≤±0.001, and find the horizontal coordinate Y of the center point at the bottom of the belt. i Repeat the above operation at the bottom of each wheel band of the rotary kiln using one or more equal-diameter double-wheel level measuring instruments with the same fixed height ΔZR from the top of the rotating shaft to the center of the circular target to find the position of the lateral coordinate Yi of the center point at the bottom of each wheel band;

[0033] S3: A total station is placed at the first station outside the rotary kiln cylinder along the center line of the rotary kiln cylinder. The first station is set so that the total station can observe a square target (5) at the first and last positions in the vertical plane determined by the X axis. At the same time, the first station is set so that the total station can also aim at the center points of two circular targets of the equal-diameter double-wheel level measuring instrument adsorbed on the bottom of two or three wheel belts to determine the spatial position parameters of the center points of each circular target at each wheel belt: [X0R1 , Y 0R1 , Z 0R1 ] and [X 0R2 , Y 0R2 , Z 0R2 ], or [X 0R3 , Y 0R3 , Z 0R3 ];

[0034] The rotary kiln is in each X i The coordinate parameters of the center point of the wheel cylinder are:

[0035] Axis coordinate: X 0i =X 0Ri ; Horizontal coordinate: Y 0i =Y 0Ri ;

[0036] Vertical coordinate: Z 0i =Z 0Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2;

[0037] Where i is the serial number of the tyre; Z 0Ri It is the height of the center of the circular target adsorbed on the level measuring instrument at the bottom of the tyre, measured by the total station; ΔZ R It is the fixed height from the top of the rotating shaft on the level measuring instrument to the center of the circular target; D i is the wheel diameter, measured by a diameter gauge; ΔD i is the hot gap between the wheel belt and the cylinder pad, measured by the gap meter; a is the design slope of the rotary kiln;

[0038] S4: Rotate the rotary kiln to 90 degrees, 180 degrees, and 270 degrees to eliminate the negative impact of the bending of the rotary kiln itself on the detection accuracy, and calculate according to the following formula:

[0039] [X 90i =X 90Ri , Y 90i =Y 90Ri , Z 90i =Z 90Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0040] [X 180i =X 180Ri , Y 180i =Y 180Ri , Z 180i =Z 180Ri +ΔZ R+(D i -ΔD i )×(cos a) / 2];

[0041] [X 270i =X 270Ri , Y 270i =Y 270Ri , Z 270i =Z 270Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0042] Put in each X i The sum of the horizontal and vertical coordinate parameters of the actual center point of the tire cylinder is taken as the average value:

[0043] Y i平均 =(Y 0Ri +Y 90Ri +Y 180Ri +Y 270R ) / 4;

[0044] Z i平均 =(Z 0Ri +Z 90Ri +Z 180Ri ++Z 270Ri +) / 4+ΔZ R +(D i -ΔD i )×(cos a) / 2;

[0045] The kiln axial coordinate X is affected by the bending of the kiln shell. i No impact, so X i平均 =X Ri ;

[0046] Rotary kiln belt serial number i ≥ 3, in each X i There is a deviation between the actual center point of the wheel cylinder and its ideal straightness: ΔY i , ΔZ i .

[0047] In the above-mentioned method for detecting the center line of the static cooling rotary kiln shell, if the total station cannot aim at the center point of the circular target adsorbed on the bottom of the third wheel belt at the first station, the total station is moved to the second station of the rectangular coordinate system. The second station is set so that the total station can first observe that a square target (5) is set at the first and last positions in the vertical plane determined by the X-axis line at the second station, and at the same time, the total station can also aim at the centers of two circular targets (9) of the equal-diameter double-wheel level measuring instrument adsorbed on the bottom of the second and third wheel belts.

[0048] In the above-mentioned static cooling rotary kiln cylinder centerline detection method and detection instrument, the total station is equipped with a matching microcomputer system, a computer program is stored in the microcomputer system, and the wheel belt diameter D is manually input. i , wheel tyre hot clearance ΔD i , the fixed height ΔZ from the top of the rotating shaft on the level measuring instrument to the center of the circular target R , the design slope a parameter of the rotary kiln to execute the computer program; when the computer program is executed, the design slope a parameter of the rotary kiln is to execute the computer program according to each wheel belt X i The actual center point of the cylinder [Y i , Z i ] and [Y i平均 , Z i平均 ] can be calculated by the calculation formula, and the i The deviation value of the actual center point of the cylinder [ΔY i , ΔZ i ]; The microcomputer system is configured to selectively save, record, delete and modify all measurement data of the total station.

[0049] Compared with the devices and methods of existing measurement technologies, the present invention has the following advantages:

[0050] 1) It is not necessary to use a total station to measure the horizontal distance d from the two reference vertical planes to the wheel belt on both sides of each wheel belt. i and d i ′, it is only necessary to install an adsorption level measuring instrument directly below each wheel belt. Its U-shaped equal-diameter double-wheel structure can ensure that the level measuring instrument is adaptively parallel to the outer side of the wheel belt. Move the level measuring instrument in the horizontal direction so that the electronic level on it displays ≤±0.001, and the precise position of the center point of the bottom of each wheel belt can be quickly found; then use the total station to observe any two square targets placed on the vertical plane of the X-axis. At the same time, the total station can also observe the center point of the circular target adsorbed on the bottom of each wheel belt, that is, determine its [X R1 , Y R1 , Z R1 ] Three-dimensional coordinate parameters. Its operation process is simple, fast and safe, and can ensure that the measurement accuracy of the center point of the rotary kiln cylinder at the measured wheel belt (in the horizontal plane and the vertical plane) is ≤±3 mm.

[0051] 2) The detection instrument of the present invention has low cost and convenient operation process, and is suitable for cement companies to purchase by themselves. Ordinary technicians of cement companies can use the instrument independently after being trained once. It only takes about 5 hours to measure the center line of a static 3-speed rotary kiln. Cement companies can measure the kiln center line at any time according to the needs of rotary kiln detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0053] Figure 1 It is a schematic diagram of measuring the wheel position of a rotary kiln at the Xi section in the prior art.

[0054] Figure 2 It is a schematic diagram of measuring the cylinder position at the wheel band at the Xi cross section in the prior art.

[0055] Figure 3 The figure is a schematic diagram of the arrangement principle of the total station when measuring the center point of the bottom of each wheel belt of the static rotary kiln according to the present invention.

[0056] Figure 4 The figure is a schematic diagram showing the principle of the equal-diameter double-wheel level measuring instrument of the present invention for measuring the center point of the cylinder at the wheel band.

[0057] Figure 5 It is a side view of the equal-diameter double-wheel level measuring instrument of the present invention.

[0058] Figure 6 It is a front view of the equal-diameter double-wheel level measuring instrument of the present invention.

[0059] Figure 7 It is a schematic diagram of the alignment principle of the level measuring instrument of the present invention.

[0060] Figure 3-7 The reference numerals in the drawings are described as follows:

[0061] 1. Wheel band, 2. Cylinder, 3. Center line of kiln cylinder, 4. Total station, 5. Square target, 6. Linear bearing seat, 7. Electronic level, 8. Rotating shaft, 9. Round target, 10. Cylindrical magnet, 11. U-shaped beam, 12. Double wheel bearing, 13. Rectangular magnet, 14. Equal diameter double wheel level measuring instrument. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0063] like Figure 3 As shown, the method for detecting the center line of the static cooling rotary kiln cylinder of the present invention comprises the following steps:

[0064] First, a rectangular coordinate system X, Y, and Z is established outside the rotary kiln. The X axis is substantially parallel to the axis 3 of the rotary kiln cylinder 2. A square target 5 is set at any head and tail position of the X axis (the head and tail positions in the vertical plane of the X axis can be determined arbitrarily, and the square target 5 is only used to determine the vertical plane of the X axis). The steps are:

[0065] (1) See Figure 5-Figure 7, place four rectangular magnets 13 (not all shown) close to each equal-diameter double-wheel bearing 12, parallel to the outer side of the wheel belt 1, and adsorb the equal-diameter double-wheel level measuring instrument 14 on the bottom of each wheel belt 1. By horizontally moving each level measuring instrument 14 so that the display value of the electronic level 7 on it is ≤0.001, the horizontal coordinate Y of the bottom center point of each wheel belt 1 can be found. i location.

[0066] (2) See Figure 3 , a total station 4 is placed at a suitable first site. First, the total station 4 and the supporting microcomputer system can observe any two square targets 5 on the vertical plane of the X axis; see Figure 4 , the shaft 8 is rotated on each level measuring instrument 14 to make its circular target plane 9 substantially vertical to the total station 4; at the same time, the total station 4 can also aim at the center points of the two (or three) circular targets 9 of each level measuring instrument adsorbed at the bottom of the first belt and the second belt (preferably the third belt); the spatial position parameters of the center points of the two (or three) circular targets can be determined: [X R1 , Y R1 , Z R1 ]、[X R2 , Y R2 , Z R2 ], or [X R3 , Y R3 , Z R3 ].

[0067] (3) If the total station 4 cannot aim at the center point of the circular target 9 adsorbed on the bottom of the third belt at the first station, the total station is moved to the second station, where the total station and the supporting microcomputer system can first observe any two square targets 5 placed on the vertical plane of the X axis. At the same time, the total station can also aim at the center points of the two circular targets 9 adsorbed on the bottom of the second belt and the third belt (level measuring instrument). The spatial position parameters of the center points of the two circular targets 9 adsorbed on the bottom of the second belt and the third belt (level measuring instrument) are: [X R2 , Y R2 , Z R2 ]、[X R3 , Y R3 , Z R3 ].

[0068] The total station 4 can measure the three coordinate parameters of the center point of the rotary kiln (at the i-blocking wheel belt) at the 0-angle azimuth: kiln axial coordinate X 0i =X 0Ri ; Kiln horizontal coordinate Y 0i =Y 0Ri ; The kiln longitudinal coordinate Z can be calculated 0i =Z 0Ri +ΔZR +(D i -ΔD i )×(cos a) / 2, where the parameters are as follows: wheel diameter D i , wheel tyre hot clearance ΔD i , the fixed height ΔZ from the top of the rotating shaft to the center of the circular target R , kiln installation slope a.

[0069] In order to eliminate the negative impact of the bending of the rotary kiln itself on the accuracy of the detection method, the rotary kiln can be rotated 90 degrees, 180 degrees, and 270 degrees, and the following values ​​can be calculated according to the above steps (1), (2), and (3):

[0070] [X 90i =X 90Ri , Y 90i =Y 90Ri , Z 90i =Z 90Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0071] [X 180i =X 180Ri , Y 180i =Y 180Ri , Z 180i =Z 180Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0072] [X 270i =X 270Ri , Y 270i =Y 270Ri , Z 270i =Z 270Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2];

[0073] The sum of the horizontal and vertical coordinate parameters of the rotary kiln at the four corners is averaged:

[0074] Y i平均 =(Y 0Ri +Y 90Ri +Y 180Ri +Y 270R ) / 4;

[0075] Z i平均 =(Z 0Ri +Z90Ri +Z 180Ri ++Z 270Ri +) / 4+ΔZ R +(D i -ΔD i )×(cos a) / 2.

[0076] In each X i There is a deviation between the average value of the actual center point of the wheel drum and the ideal straightness of the kiln drum. According to the spatial geometric projection relationship, the average value of the actual center point of the wheel drum at each X i Deviation value of the center point of the wheel cylinder: ΔY i , ΔZ i . Press this button to adjust the center line of the rotary kiln.

[0077] According to each tire X i The actual center point of the cylinder [Y i , Z i ] and [Y i平均 , Z i平均 In addition to manual calculation, the software program in the computer system supporting the total station is preferred to be used for corresponding processing to quickly obtain the result. The functions of the software include: selectively saving, recording, deleting and modifying all the measurement data of the total station; manually inputting the wheel diameter D i , wheel tyre hot clearance ΔD i , Parameters: Height ΔZ from the top of the rotation axis to the circular target R , kiln installation slope or rotary kiln design slope a and other parameters; after processing according to the above related calculation formula, the i The deviation value of the actual center point of the cylinder [ΔY i , ΔZ i ].

[0078] See Figure 5 and Figure 6 , same height ΔZ R The equal-diameter double-wheel level measuring instrument 14 is composed of a U-shaped beam 11 (including a horizontal bottom surface and a vertical surface or vertical surface with two U-shaped arms vertically upward from the midline of the horizontal surface, and the forward projection is as follows Figure 5 The invention is composed of two equal diameter double wheel bearings 12, a mobile electronic level 7, a target assembly, and four rectangular magnets 13. The equal diameter double wheel level measuring instrument 14 is also a measuring instrument designed by the present invention to cooperate with the realization of a unique detection method.

[0079] (1) The axes of the two double wheel bearings 12 of equal diameter are in the same plane and parallel to the horizontal bottom surface of the U-shaped beam 11, and the axes of the front and rear double wheel bearings 12 are spatially symmetrically arranged with the vertical surface of the U-shaped beam 11 as the center, and the horizontal spacing between the axes of the front and rear double wheel bearings 12 is ≥200 mm; the axes of the two double wheel bearings 12 are both perpendicular to the vertical surface of the U-shaped beam 11, and the two pairs of double wheel bearings 12 are separately installed on both sides of the vertical surface of each U-shaped arm, and the highest point of the outer diameter of the two pairs of double wheel bearings 12 is about ≥3 mm higher than the top height of the vertical surface of the U-shaped beam 11;

[0080] (2) See Figure 5 The electronic level 7 can be movably adsorbed and installed on the horizontal bottom surface of one side of the U-shaped beam of the level measuring instrument. The horizontal bottom surface is spatially parallel to the axes of the two double-wheel bearings 12 and the plane where the highest points of their outer diameters are located; the target assembly is fixed on the other side of the U-shaped beam relative to the electronic level 7.

[0081] (3) See Figure 5 and Figure 6 The target assembly of the level measuring instrument 14 is composed of a linear bearing seat 6, a circular target 9, a rotating shaft 8, and a cylindrical magnet 10. The linear bearing seat 6 is fixed on the middle line of the horizontal bottom surface of the U-shaped beam 11 (the middle line is parallel to the Figure 5 The horizontal base 11 has a horizontal length and is located at the middle point of the vertical length), the rotating shaft 8 is installed in the linear bearing seat 6 and can rotate, the circular target 9 is installed at the semicircular rod of the rotating shaft 8, and the midpoint of the target plane of the circular target 9 is perpendicular to the axis line of the rotating shaft 8 (that is, parallel to the middle line of the horizontal bottom surface of the U-shaped beam), and the target plane of the circular target 9 can be rotated to be basically perpendicular to the total station 4.

[0082] See Figure 4 , Figure 5 , Figure 6 , four (not all shown) rectangular magnets 13 are respectively attached to the double wheel bearings 12 of the level measuring instrument 14, and the level measuring instrument 14 can be stably attached to the bottom of the wheel belt 1 through the four rectangular magnets. A cylindrical magnet 10 is installed on the top of the rotating shaft 8 on the level measuring instrument 14, and the fixed height from its top to the center of the circular target is ΔZ R , it can be stably adsorbed on the surface of the bottom of the wheel belt 1.

[0083] The reflective target sheets of the square target 5 and the round target 9 of the present invention are both reflective sheets of conventional materials with high-intensity reflection sold on the market.

[0084] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. An equal-diameter double-wheel level measuring instrument (14), characterized in that include: A U-shaped beam (11) base comprises a horizontal bottom surface and a vertical surface arranged vertically upward from the horizontal midline of the horizontal bottom surface to form a T-shaped cross section, wherein the vertical surface has two U-shaped arms symmetrical with respect to the midline in the depth direction of the horizontal bottom surface; Two double wheel bearings (12) of equal diameter are symmetrically arranged on two arms of the U-shape of the vertical plane along the middle line in the depth direction, and the axes of the double wheel bearings (12) located on different arms are located at the same horizontal height, and the axes are parallel to the middle line, and the highest point of the outer diameter of each double wheel bearing (12) is higher than the top surface of the vertical plane; An electronic level (7) is arranged on a middle line on one side of the horizontal bottom surface of the base of the U-shaped beam (11) divided by vertical surfaces; The target assembly is located on the other side of the horizontal bottom surface of the U-shaped beam (11) base on which the electronic level (7) is located, and includes a linear bearing seat (6) fixed on the middle line of the horizontal bottom surface, a rotating shaft (8) vertically installed in the linear bearing seat (6) and rotatable around its own axis, and a circular target (9) installed at a height of half the length of the rotating shaft (8); the target plane of the circular target (9) is located on the axis of the rotating shaft (8) and the mid-perpendicular line of the target plane is parallel to the axis of each double wheel bearing (12); the target plane of the circular target (9) can be rotated to be substantially perpendicular to the total station (4) arranged outside the cylinder along the center line of the cylinder to be measured; A first magnet (10) is mounted on the top of the rotating shaft (8) and is used to stably adsorb on the surface of the bottom of the wheel belt (1) of the cylinder to be tested; Four second magnets (13) are respectively adsorbed and installed on the outer sides of the double wheel bearings (12) and are used to adsorb the level measuring instrument (14) as a whole stably on the bottom of the wheel belt (1) of the cylinder to be measured through the four second magnets (13).

2. The equal-diameter double-wheel level measuring instrument (14) according to claim 1, characterized in that The electronic level (7) is detachably fixed on the base of the U-shaped beam (11) so as to be installed on the bases of the U-shaped beams (11) of three measuring instruments (14) in turn for use.

3. The equal-diameter double-wheel level measuring instrument (14) according to claim 1, characterized in that The first magnet (10) is a cylindrical magnet; the second magnet (13) is a rectangular magnet.

4. The equal-diameter double-wheel level measuring instrument (14) according to claim 1, characterized in that Each wheel of the double wheel bearing (12) on the same arm of the U-shaped beam (11) base is axially symmetrically arranged relative to the horizontal center line of the horizontal bottom surface, and the axes of two double wheel bearings (12) on different arms are axially symmetrically arranged relative to the center line in the depth direction of the horizontal bottom surface, and the spatial spacing is ≥200mm.

5. The equal-diameter double-wheel level measuring instrument (14) according to claim 1, characterized in that The highest point of the outer diameter of each double wheel bearing (12) is higher than the top surface of the vertical surface by ≥3mm.

6. The equal-diameter double-wheel level measuring instrument (14) according to claim 1, characterized in that The total station is provided with a matching microcomputer system, and the microcomputer system is configured to selectively save, record, delete and modify all measurement data of the total station; a computer program is stored in the microcomputer system, and the computer program is configured to: When the wheel diameter D is manually input i , wheel tyre hot clearance ΔD i , the fixed height ΔZ from the top of the rotating shaft on the level measuring instrument (14) to the center of the circular target (9) R , the design slope a parameter of the rotary kiln, the computer program calculates each wheel belt X i The coordinates of the center point of the cylinder [Y i、 Z i ] and [Y i平均、 Z i平均 ] and quickly get each wheel with X i The deviation value of the actual center point of the cylinder [ΔY i、 ΔZ i ]: The XYZ coordinates of the center point of the rotary kiln cylinder at the three wheel belts are: [X 90i =X 90Ri 、Y 90i =Y 90Ri 、Z 90i =Z 90Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; [X 180i =X 180Ri 、Y 180i =Y 180Ri 、Z 180i =Z 180Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; [X 270i =X 270Ri 、Y 270i =Y 270Ri 、Z 270i =Z 270Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; AND i平均 (And 0Ri +Y 90Ri +Y 180Ri +Y 270R ) / 4; Z i平均 =(Z 0Ri +Z 90Ri +Z 180Ri ++Z 270Ri +) / 4+ΔZ R +(D i -ΔD i )×(cos a) / 2; The kiln axial coordinate X is affected by the bending of the kiln shell. i No impact, so X i平均 =X Ri ; Rotary kiln belt serial number i ≥ 3, in each X i There is a deviation between the actual center point of the wheel cylinder and its ideal straightness: ΔY i、 ΔZ i .

7. A method for detecting the center line of a static cooling rotary kiln cylinder, characterized in that The equal-diameter double-wheel level measuring instrument (14) described in any one of claims 1 to 6 is used for measurement in conjunction with a total station (4). An equal-diameter double-wheel level measuring instrument (14) is installed and adsorbed directly below each retaining wheel belt (1). The level measuring instrument (14) is moved in the horizontal direction of each retaining wheel belt so that the electronic level (7) on the level measuring instrument (14) displays ≤±0.001, thereby quickly finding the precise position of the center point of the bottom of each wheel belt. The total station (4) is then used to observe any two square targets (5) set at the first and last positions in the vertical plane determined by the X-axis line. At the same time, the total station (4) is used to observe the center points of the circular targets (9) of the double-wheel level measuring instrument (14) adsorbed on the bottom of two or three wheel belts, thereby determining the three-dimensional coordinate parameters of the center point of the bottom of each wheel belt.

8. The method for detecting the center line of the static cooling rotary kiln shell according to claim 7, characterized in that An electronic level (7) is used, and the electronic level (7) is arranged to be movably mounted on the base of the U-shaped beam (11) of the equal-diameter double-wheel level measuring instrument (14) adsorbed under each wheel belt for use in turn.

9. The method for detecting the center line of the static cooling rotary kiln shell according to claim 7, characterized in that The steps include: S1: Establish a [Xi, Yi, Zi] rectangular coordinate system outside the rotary kiln, wherein the X axis is substantially parallel to the center line of the rotary kiln cylinder, and set a square target (5) at each of the first and last positions in the vertical plane determined by the X axis, and the distance between the two square targets is ≥ 25 meters; S2: Install an adsorption level measuring instrument (14) directly below each stop belt, move the electronic measuring instrument (14) in the horizontal direction of each stop belt so that the electronic level (7) installed on the electronic measuring instrument (14) displays ≤±0.001, and find the horizontal coordinate Y of the center point at the bottom of the belt i Repeat the above operation at the bottom of each wheel band of the rotary kiln using one or more equal-diameter double-wheel level measuring instruments with the same fixed height ΔZR from the top of the rotating shaft to the center of the circular target to find the position of the lateral coordinate Yi of the center point at the bottom of each wheel band; S3: A total station is placed at the first station outside the rotary kiln cylinder along the centerline direction of the rotary kiln cylinder. The first station is set so that the total station can observe two square targets (5) set at the first and last positions in the vertical plane determined by the X axis. At the same time, the first station is set so that the total station can also aim at the center points of the circular targets of the two or three equal-diameter double-wheel level measuring instruments adsorbed on the bottom of the wheel belts to determine the spatial position parameters of the center points of the circular targets at each wheel belt: [X 0R1 , Y 0R1 , Z 0R1 ] and [X 0R2 , Y 0R2 , Z 0R2 ], or [X 0R3 , Y 0R3 , Z 0R3 ]; The rotary kiln is in each X i The coordinate parameters of the center point of the wheel cylinder are: Axis coordinate: X 0i =X 0Ri ; Horizontal coordinate: Y 0i =Y 0Ri ; Vertical coordinate: Z 0i =Z 0Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2; Where i is the serial number of the tyre; Z 0Ri It is the height of the center of the circular target adsorbed on the level measuring instrument at the bottom of the tyre, measured by the total station; ΔZ R It is the fixed height from the top of the rotating shaft on the level measuring instrument to the center of the circular target; D i is the wheel diameter, measured by a diameter gauge; ΔD i is the hot gap between the wheel belt and the cylinder pad, measured by the gap meter; a is the design slope of the rotary kiln; S4: Rotate the rotary kiln to 90 degrees, 180 degrees, and 270 degrees to eliminate the negative impact of the bending of the rotary kiln itself on the detection accuracy, and calculate according to the following formula: [X 90i =X 90Ri 、Y 90i =Y 90Ri 、Z 90i =Z 90Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; [X 180i =X 180Ri 、Y 180i =Y 180Ri 、Z 180i =Z 180Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; [X 270i =X 270Ri 、Y 270i =Y 270Ri 、Z 270i =Z 270Ri +ΔZ R +(D i -ΔD i )×(cos a) / 2]; Put in each X i The sum of the horizontal and vertical coordinate parameters of the actual center point of the tire cylinder is taken as the average value: AND i平均 (And 0Ri +Y 90Ri +Y 180Ri +Y 270R ) / 4; Z i平均 =(Z 0Ri +Z 90Ri +Z 180Ri ++Z 270Ri +) / 4+ΔZ R +(D i -ΔD i )×(cos a) / 2; The kiln axial coordinate X is affected by the bending of the kiln shell. i No impact, so X i平均 =X Ri ; Rotary kiln belt serial number i ≥ 3, in each X i There is a deviation between the actual center point of the wheel cylinder and its ideal straightness: ΔY i、 ΔZ i .

10. A method for detecting the center line of a static cooling rotary kiln cylinder according to claim 7, characterized in that If the total station cannot aim at the center point of the circular target adsorbed on the bottom of the third wheel belt at the first station, the total station is moved to the second station of the rectangular coordinate system; the second station is set so that the total station can first observe any two square targets (5) set at the first and last positions in the vertical plane determined by the X-axis line at the second station, and the total station can also aim at the centers of two circular targets (9) of the equal-diameter double-wheel level measuring instrument adsorbed on the bottom of the second and third wheel belts.

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