Novel efficient positioning instrument for coal injection duct of dry-process rotary kiln

Abstract

The invention discloses a novel efficient positioning instrument for a coal injection duct of a dry rotary kiln, which belongs to the technical field of optical metrology and comprises a support rod structure, one end of the support rod structure can be connected to the end of the coal injection duct through a connecting mechanism, and a mounting plate mechanism capable of rotating along the axis of the support rod structure is connected to the support rod structure. A laser range finder is mounted on the mounting plate mechanism; the axis of the support rod structure coincides with the axis of the connecting mechanism. One side of the mounting plate mechanism is fixedly connected with a first stepping motor, the output end of the first stepping motor is fixedly connected with a rotating disc, and the laser range finder is fixedly mounted on the rotating disc. The coal injection duct can be accurately and efficiently positioned, the coaxial state of the coal injection duct and the rotary kiln is accurately determined, and uneven coal injection caused by axis deviation of the coal injection duct and the rotary kiln is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of optical metrology, and in particular relates to a novel dry process rotary kiln coal injection pipe high-efficiency positioning instrument. Background Art

[0002] In many industrial fields involving rotary kilns, such as new dry process cement production, accurate positioning of the coal injection pipe is crucial. As a core equipment, the heating uniformity, reaction efficiency and product quality of the internal materials of the rotary kiln largely depend on the accuracy of the coal injection pipe position. However, the traditional methods and devices for determining the position of the coal injection pipe have many significant defects.

[0003] Traditional processes often rely on manual experience combined with simple measuring tools to estimate and adjust the position of the coal injection pipe. Workers rely on visual observation and basic measuring tools such as tape measures to try to determine the axial relationship between the coal injection pipe and the rotary kiln and its reasonable layout in the kiln. This method is highly subjective, and it is difficult to unify the operating standards of different workers, resulting in large positioning errors of the coal injection pipe, generally up to several centimeters or more. In this way, coal cannot be accurately sprayed into the ideal combustion area, the temperature field in the kiln is unevenly distributed, some materials are overheated and others are underheated, which seriously affects product quality and increases the defective rate. In cement production, it manifests as unstable cement clinker strength and excessive free calcium content, which greatly reduces production efficiency.

[0004] Furthermore, as the rotary kiln continues to operate, agglomeration will inevitably occur on the inner wall, and various impurities will also be attached, such as unburned coal ash, crystals produced by material decomposition, etc. Traditional measurement methods are difficult to penetrate these interference factors to obtain true and accurate information about the structure of the kiln, and cannot effectively eliminate the misleading judgment of the coal injection pipe positioning caused by local anomalies, resulting in subsequent adjustments in the wrong direction. Not only can the position of the coal injection pipe not be optimized, but it may also aggravate the incoordination between combustion and material reaction, and even damage equipment, causing frequent shutdowns for maintenance, further reducing production capacity, and increasing operation and maintenance costs.

[0005] In addition, some existing simple positioning devices lack flexible and accurate angle adjustment and all-round measurement functions. Most of them can only measure distances at fixed angles or in a limited number of directions, and cannot fully scan the relative position relationship between the coal injection pipe and the rotary kiln. It is difficult to meet the stringent requirements for high-precision positioning in complex industrial environments, and cannot provide reliable technical support for the efficient and stable operation of equipment, which seriously restricts the development of related industries in a refined and efficient manner, and urgently calls for new, intelligent and accurate coal injection pipe positioning instruments and technological innovations. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a novel dry process rotary kiln coal injection pipe high efficiency positioning instrument.

[0007] The present invention is achieved in this way: a novel dry process rotary kiln coal injection pipe high-efficiency positioning instrument comprises a support rod structure, one end of the support rod structure can be connected to the end of the coal injection pipe through a connecting mechanism, the support rod structure is connected to a mounting plate mechanism that can rotate along the axis of the support rod structure, and a laser rangefinder is installed on the mounting plate mechanism; wherein the axis of the support rod structure coincides with the axis of the connecting mechanism; a first stepper motor is fixedly connected to one side of the mounting plate mechanism, a turntable is fixedly connected to the output end of the first stepper motor, and the laser rangefinder is fixedly installed on the turntable.

[0008] As a preferred embodiment of the present invention, the connecting structure includes a fixed plate, the edge of the fixed plate is provided with a plurality of annular equidistant notches, the fixed plate is provided with a plurality of annular equidistant first slideways, the first slideway is slidably connected with a slider, and a clamping block is provided on one side of the slider.

[0009] As a preferred embodiment of the present invention, a connecting rod is provided on the sliding block, and a first rack is fixedly connected to the lower end of the connecting rod; a gear ring is rotatably sleeved on the support rod structure, and the gear ring is meshed with the first rack.

[0010] As a preferred embodiment of the present invention, a mounting groove is provided on the bracket rod structure, a pawl is provided in the mounting groove, and a ratchet that cooperates with the pawl is provided on the inner ring of the gear ring.

[0011] As a preferred embodiment of the present invention, a second rack is fixedly connected to the middle portion of the connecting rod; a gear ring is fixedly connected to the edge of the turntable; and the gear ring can mesh with the second rack.

[0012] As a preferred embodiment of the present invention, the bracket rod structure includes a fixed tube and a second stepper motor, the fixed tube is fixedly connected to the center of one side of the fixed plate, and a second slide is provided on the fixed tube; the second stepper motor is fixedly connected to the center of the other side of the fixed plate, and the output end of the second stepper motor is fixedly connected to a screw rod, and the screw rod is located in the fixed tube; a threaded barrel is threadedly connected to the screw rod, and a connecting plate is fixedly connected to the outer surface of the threaded barrel, and the connecting plate is slidably connected to the second slide.

[0013] As a preferred embodiment of the present invention, the screw rod extends out of the fixed tube, and the other end of the screw rod away from the second stepper motor is elastically connected to a limiting block, the limiting block is provided with a slot, and the threaded barrel is provided with a block that can be engaged with the slot.

[0014] As a preferred embodiment of the present invention, the mounting plate mechanism comprises a cylinder and a plate body, the cylinder is sleeved on the fixing tube, and the plate body is fixedly connected to the cylinder;

[0015] The inner wall of the cylinder is fixedly connected to the connecting piece.

[0016] As a preferred embodiment of the present invention, a plurality of plate bodies are provided, and the plurality of plate bodies are equidistantly arranged in an annular manner on the outside of the cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 2. Beneficial Effects

[0019] 1. Accurately determine the coaxial state of the coal injection pipe and the rotary kiln to avoid uneven coal injection due to axis deviation between the two. Uniform coal injection is the key to ensuring that the materials in the dry rotary kiln are fully and stably heated. It can greatly reduce product quality fluctuations caused by uneven heat distribution and ensure that the performance of each batch of output materials is stable and up to standard. During the equipment installation and commissioning stage and subsequent regular inspection and maintenance, the axis calibration can be completed quickly and accurately, which greatly shortens the equipment commissioning time, improves the overall operating efficiency of the production equipment, and reduces the production capacity loss caused by shutdown commissioning.

[0020] 2. The internal working conditions of the rotary kiln are complex, and the inner wall is prone to agglomeration and impurities. The multi-angle measurement function of the instrument effectively avoids local abnormal interference. Compared with traditional single-angle measurement equipment, the data credibility is greatly improved, providing equipment operators with real and reliable information on the conditions inside the kiln, so that they can make accurate adjustment decisions based on this information, and prevent improper operations caused by erroneous data from damaging equipment or affecting the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 2 is a schematic structural diagram of a novel dry process rotary kiln coal injection pipe high efficiency positioning instrument provided by an embodiment of the present invention from a first perspective;

[0022] Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the enlarged structure of part A;

[0023] Figure 3 2 is a schematic structural diagram of a novel dry process rotary kiln coal injection pipe high efficiency positioning instrument provided by an embodiment of the present invention from a second viewing angle;

[0024] Figure 4 It is a structural schematic diagram of a novel dry process rotary kiln coal injection pipe high-efficiency positioning instrument provided by an embodiment of the present invention from a third perspective;

[0025] Figure 5 The embodiment of the present invention provides Figure 4 Schematic diagram of the cross-sectional structure of the middle BB part;

[0026] Figure 6 The embodiment of the present invention provides Figure 5 A schematic diagram of the enlarged structure of the middle C part;

[0027] Figure 7 The embodiment of the present invention provides Figure 5 Schematic diagram of the enlarged structure of part D.

[0028] In the figure: 1, laser rangefinder; 2, first stepper motor; 3, turntable; 4, fixed plate; 5, notch; 6, first slideway; 7, slider; 8, clamping block; 9, connecting rod; 10, first rack; 11, gear ring; 12, mounting groove; 13, pawl; 14, ratchet; 15, second rack; 16, gear ring; 17, fixed tube; 18, second stepper motor; 19, second slideway; 20, lead screw; 21, threaded barrel; 22, connecting plate; 23, limit block; 24, slot; 25, clamping block; 26, cylinder; 27, plate. DETAILED DESCRIPTION

[0029] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0030] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0031] like Figures 1 to 7 As shown, an embodiment of the present invention provides a novel dry process rotary kiln coal injection pipe efficient positioning instrument, comprising a support rod structure, one end of the support rod structure can be connected to the end of the coal injection pipe through a connecting mechanism, the support rod structure is connected to a mounting plate mechanism that can rotate along the axis of the support rod structure, and a laser rangefinder 1 is installed on the mounting plate mechanism; wherein the axis center of the support rod structure coincides with the axis center of the connecting mechanism; a first stepper motor 2 is fixedly connected to one side of the mounting plate mechanism, a turntable 3 is fixedly connected to the output end of the first stepper motor 2, and the laser rangefinder 1 is fixedly installed on the turntable 3.

[0032] The core components of the positioning instrument include a support rod structure, a connecting mechanism, a mounting plate mechanism and a laser rangefinder 1. One end of the support rod structure is connected to the end of the coal injection pipe by means of the connecting mechanism, and the axes of the two coincide to ensure the uniformity of the measurement reference; the mounting plate mechanism can rotate around the axis of the support rod structure, providing a basis for the all-round measurement of the laser rangefinder 1. The first stepper motor 2 on one side of the mounting plate drives the turntable 3 to rotate, accurately controlling the angle change of the laser rangefinder 1.

[0033] When used, the following steps are included:

[0034] During the initial installation, the end of the coal injection pipe is tightly connected using the connecting mechanism, and the first stepper motor 2 is started to drive the turntable 3 to rotate, so that the laser rangefinder 1 is tilted to align with the end of the coal injection pipe. Then let the mounting plate mechanism rotate a full circle around the support rod structure. During this process, the laser rangefinder 1 continues to collect data. Since the support rod structure is consistent with the axis of the connecting mechanism, if there is a deviation between the axis of the coal injection pipe and the axis of the support rod, the distance value fed back by the laser rangefinder 1 will show regular changes in the circular motion (such as the distance in a certain direction continues to increase or decrease), so as to accurately judge whether the axes of the two are aligned. It should be noted that the connecting mechanism may block part of the end of the coal injection pipe, and this part of the data can be excluded.

[0035] The mounting plate mechanism moves to a preset position (e.g., a position where the mounting plate mechanism can rotate) along the axis of the support rod structure, and the first stepper motor 2 is controlled again to rotate the turntable 3 to adjust the laser rangefinder 1 to a vertical state with the support rod structure. Then the mounting plate mechanism is driven to rotate one circle, and the laser beam is directed directly to the inner wall of the rotary kiln. According to the distance data of each point on the inner wall of the rotary kiln measured by the laser rangefinder 1, the deviation of the coal injection pipe relative to the axis of the rotary kiln is calculated, and then the coaxial calibration is achieved by adjusting the position of the coal injection pipe. In order to deal with the problem of agglomeration or impurities on the inner wall of the rotary kiln interfering with the measurement accuracy, the laser rangefinder 1 can be tilted at different angles through the turntable 3. Multi-angle measurement of different positions on the inner wall of the rotary kiln, comprehensive integration of multiple sets of data, elimination of measurement errors caused by local anomalies, and accurate judgment of the true contour of the inner wall of the rotary kiln and the relative position relationship of the coal injection pipe are ensured.

[0036] Exemplarily, the connection structure includes a fixed plate 4, an edge of which is provided with a plurality of annular equidistant notches 5, the fixed plate 4 is provided with a plurality of annular equidistant first slideways 6, the first slideways 6 are slidably connected with a slider 7, and a clamping block 8 is provided on one side of the slider 7.

[0037] When using the new dry process rotary kiln coal injection pipe efficient positioning instrument, the connection structure and the end of the coal injection pipe must first be assembled and docked. At this time, the slider 7 on the fixed plate 4 is in the initial position, and a certain space is reserved between the clamping block 8 and the coal injection pipe, which is convenient for inserting the end of the coal injection pipe into the area surrounded and defined by multiple clamping blocks 8.

[0038] When the end of the coal injection pipe is in place, the slider 7 is moved synchronously. Since the slider 7 is installed on the first slideway 6 of the fixed plate 4, the first slideway 6 plays a precise guiding role to ensure that the slider 7 can only slide along the predetermined straight line track. As the slider 7 moves smoothly along the first slideway 6 toward the coal injection pipe, the clamping block 8 fixed on one side of the slider 7 also approaches the coal injection pipe. Each clamping block 8 is pushed by its corresponding slider 7 to gradually fit the outer surface of the coal injection pipe from different directions until it finally clamps the coal injection pipe tightly.

[0039] Because the notch 5 on the fixed plate 4 and the first slideway 6 are arranged in a circular shape and at equal intervals, the movement path of each clamping block 8 is precisely planned, and the force is evenly applied during the clamping process, so that the end of the coal injection pipe can be wrapped in all directions, so that the axis of the coal injection pipe and the axis of the support rod structure naturally coincide. This structural design ensures the stability and accuracy of the connection from a mechanical point of view, laying a solid foundation for subsequent positioning and measurement work. In addition, during the entire measurement and equipment operation period, the clamping block 8 continues to provide a stable clamping force, effectively preventing the coal injection pipe from being displaced or loosened due to external interference factors, ensuring that the measurement data and equipment operation status are always reliable.

[0040] Exemplarily, a connecting rod 9 is provided on the slider 7 , and a first rack 10 is fixedly connected to the lower end of the connecting rod 9 ; a gear ring 11 is rotatably sleeved on the bracket rod structure, and the gear ring 11 is meshed with the first rack 10 .

[0041] When the clamping block 8 of the connection structure needs to clamp the coal injection pipe, the first rack 10 can be moved (through a mechanical mechanism). Since the first rack 10 is fixedly connected to the slider 7 through the connecting rod 9, and the toothed ring 11 is rotatably sleeved on the support rod structure and meshed with the first rack 10, when the first rack 10 is forced to move, according to the meshing transmission principle of the gear rack, the first rack 10 will drive the toothed ring 11 meshed with it to rotate. Because the toothed ring 11 is annular in structure, and the first racks 10 on each slider 7 are all meshed with the toothed ring 11, the rotation of the toothed ring 11 is converted into the synchronous linear motion of each first rack 10, and then all sliders 7 are driven to slide synchronously on the first slideway 6 of the fixed plate 4, and finally multiple clamping blocks 8 are synchronously approached and clamped to the coal injection pipe from different directions, ensuring that the coal injection pipe is uniformly stressed in the circumferential direction, and the axis is precisely coincident with the axis of the support rod structure.

[0042] Exemplarily, a mounting groove 12 is provided on the support rod structure, a pawl 13 is provided in the mounting groove 12 , and a ratchet 14 cooperating with the pawl 13 is provided on the inner ring of the gear ring 11 .

[0043] In the normal operation process of clamping the coal injection pipe, when the gear ring 11 starts to rotate driven by the first rack 10, since the inner ring of the gear ring 11 is fixedly connected with the ratchet 14, and the pawl 13 provided at the mounting groove 12 of the bracket rod structure cooperates with the ratchet 14, the ratchet 14 can only rotate in the direction allowed by the pawl 13. This limits the gear ring 11 to continuous rotation in one direction, thereby ensuring that the clamping block 8 continuously and stably clamps the coal injection pipe, and the gear ring 11 will not be reversed due to external factors such as equipment vibration and airflow impact, causing the clamping block 8 to loosen.

[0044] When the connection structure and the coal injection pipe need to be removed, the operator manually moves the pawl 13 to disengage it from the ratchet 14. At this time, the gear ring 11 is no longer restricted by the unidirectional mechanism of the ratchet 14 and the pawl 13, and can rotate freely. The gear ring 11 can be rotated in the reverse direction (which can be achieved by moving the first rack 10 in the reverse direction), which can drive the slider 7 to slide in the reverse direction, and the clamping block 8 can release the coal injection pipe, which is convenient for the disassembly and maintenance of the equipment.

[0045] Exemplarily, a second rack 15 is fixedly connected to the middle of the connecting rod 9 ; a gear ring 16 is fixedly connected to the edge of the rotating disk 3 ; and the gear ring 16 can mesh with the second rack 15 .

[0046] In the automated clamping process of the equipment, the first stepper motor 2 is started, and the first stepper motor 2 drives the turntable 3 to rotate. The ring gear 16 fixedly connected to the edge of the turntable 3 rotates synchronously with the turntable 3. Since the ring gear 16 is in meshing with the second rack 15 fixedly connected to the middle of the connecting rod 9, when the ring gear 16 rotates, according to the gear and rack transmission principle, the ring gear 16 pushes the second rack 15 to make a linear motion. The second rack 15 is fixedly connected to the first rack 10, and the linear motion of the second rack 15 drives the first rack 10 to move synchronously. Finally, the first rack 10 drives the slider 7 to slide on the slideway of the fixed plate 4, so that the clamping block 8 clamps the coal injection pipe. The entire process is precisely controlled by the motor, and the various components cooperate to achieve an automated, high-precision clamping operation.

[0047] The beneficial effects of the above settings are as follows:

[0048] Improved automation: With the help of the first stepper motor 2 and a series of gear rack transmission structures, the original manual clamping operation is upgraded to an automated process, reducing manual operation errors and labor intensity, and improving the consistency and repeatability of equipment operation. It is especially suitable for large-scale and continuous production operations, ensuring that the accuracy and strength of each clamping of the coal injection pipe are the same, and improving the stability and reliability of the production process.

[0049] Advantages of integrated linkage: The meshing relationship between the gear ring 16, the second rack 15 and the first rack 10 is cleverly designed to realize the coordinated work of multiple components driven by the rotation of the turntable 3, simplifying the complexity of the equipment structure, reducing the number of parts, reducing the equipment failure rate and maintenance costs, improving the equipment space utilization, making the overall layout of the positioning instrument more compact and reasonable, optimizing the equipment performance-price ratio, and enhancing the market competitiveness of the product. In addition, the laser rangefinder 1 is upward in the original state, and the rotation of the turntable 3 can also drive the laser rangefinder 1 to tilt at the same time, so that the laser rangefinder 1 can be aligned with the end of the coal injection pipe.

[0050] Exemplarily, the bracket rod structure includes a fixed tube 17 and a second stepper motor 18, the fixed tube 17 is fixedly connected to the center of one side of the fixed plate 4, and a second slide 19 is provided on the fixed tube 17; the second stepper motor 18 is fixedly connected to the center of the other side of the fixed plate 4, and the output end of the second stepper motor 18 is fixedly connected to a screw rod 20, and the screw rod 20 is located in the fixed tube 17; a threaded barrel 21 is threadedly connected to the screw rod 20, and a connecting plate 22 is fixedly connected to the outer surface of the threaded barrel 21, and the connecting plate 22 is slidably connected to the second slide 19.

[0051] The screw rod 20 extends out of the fixing tube 17 , and the other end of the screw rod 20 away from the second stepping motor 18 is elastically connected to a limit block 23 . A slot 24 is provided on the limit block 23 , and a block 25 that can be engaged with the slot 24 is provided on the threaded barrel 21 .

[0052] The mounting plate mechanism includes a cylinder 26 and a plate body 27 . The cylinder 26 is sleeved on the fixing tube 17 , and the plate body 27 is fixedly connected to the cylinder 26 . The inner wall of the cylinder 26 is fixedly connected to the connecting piece 22 .

[0053] When in use, when the device is initially installed or reset, the second stepper motor 18 is in a stopped state. The screw rod 20 is stationary in the fixed tube 17, the threaded barrel 21 is fixed on the screw rod 20, and the threaded barrel 21 is limited to rotate by the cooperation between the connecting piece 22 and the second slideway 19. At this time, the mounting plate mechanism (composed of a cylinder 26 and a plate body 27) is sleeved on the fixed tube 17. Since the threaded barrel 21 does not move, the mounting plate mechanism is stable, and the laser rangefinder 1 is in the initial standby position, waiting for subsequent measurement instructions or angle adjustment operations.

[0054] When the axial position of the mounting plate mechanism needs to be fine-tuned to adapt to different working conditions or equipment layouts, the second stepper motor 18 is started, and the motor drives the screw 20 to rotate. Since the screw 20 and the threaded barrel 21 are threadedly connected, according to the principle of threaded transmission, when the screw 20 rotates, the threaded barrel 21 will move axially along the screw 20. The connecting piece 22 slides along the second slideway 19, playing a precise guiding role, ensuring that the threaded barrel 21 moves linearly and smoothly, thereby driving the mounting plate mechanism connected thereto to accurately move along the axis direction of the fixed tube 17, realizing flexible adjustment of the height position of the laser rangefinder 1, and meeting the needs of measuring the inner wall of the rotary kiln in different height ranges.

[0055] When the mounting plate mechanism is driven to drive the laser rangefinder 1 to make a circular rotation to achieve 360° all-round measurement of the inner wall distance of the rotary kiln, the second stepper motor 18 continuously rotates the screw 20 to move the threaded barrel 21 toward the outside of the fixed tube 17 until the connecting piece 22 is completely separated from the second slideway 19. At the same time, the block 25 on the threaded barrel 21 moves to the position of the limit block 23 at the end of the screw 20 and is clamped into the slot 24 of the limit block 23.

[0056] At this time, the screw rod 20 forms a rigid connection with the threaded barrel 21, and the subsequent rotation of the screw rod 20 no longer drives the threaded barrel 21 to move axially through the threaded transmission, but directly drives the threaded barrel 21 to rotate synchronously with the connection between the clamping block 25 and the clamping groove 24. Since the connecting piece 22 on the outer surface of the threaded barrel 21 is free from the slideway restriction, and the threaded barrel 21 is connected to the connecting piece 22 fixedly connected to the inner wall of the cylinder 26 of the mounting plate mechanism through the connecting piece 22, the screw rod 20 can drive the entire mounting plate mechanism to make a circular motion around the axis of the fixed tube 17 when it rotates, so as to realize the 360° rotation scanning of the inner wall of the rotary kiln by the laser rangefinder 1, obtain comprehensive distance data, and accurately judge the relative position between the coal injection pipe and the rotary kiln and the state of the inner wall of the kiln.

[0057] The end of the screw rod 20 extending out of the fixed tube 17 is designed with an elastic connection limit block 23. During the operation of the equipment, when the threaded barrel 21 moves beyond the stroke due to factors such as vibration, accidental collision or component processing error, the elastic structure can buffer and absorb the impact force to avoid hard collision damage to the screw rod 20, the threaded barrel 21 and related connecting parts; the clamping cooperation between the slot 24 and the clamping block 25 not only realizes the rotational power transmission, but also plays a secondary limiting role to prevent the threaded barrel 21 from being separated from the connection with the screw rod 20 due to accidental factors such as centrifugal force and vibration during circular rotation, thereby ensuring that the entire transmission and measurement action is stable and reliable, and ensuring the long-term safe operation of the equipment.

[0058] Exemplarily, a plurality of plates 27 are provided, and the plurality of plates 27 are equidistantly arranged in a ring shape outside the cylinder 26 .

[0059] Working principle of the present invention:

[0060] During the initial installation, the end of the coal injection pipe is tightly connected using the connecting mechanism, and the first stepper motor 2 is started to drive the turntable 3 to rotate, so that the laser rangefinder 1 is tilted to align with the end of the coal injection pipe. Then let the mounting plate mechanism rotate a full circle around the support rod structure. During this process, the laser rangefinder 1 continuously collects data. Since the support rod structure and the connecting mechanism have the same axis, if there is a deviation between the axis of the coal injection pipe and the axis of the support rod, the distance value fed back by the laser rangefinder 1 will show regular changes in the circular motion (such as the distance in a certain direction continues to increase or decrease), so as to accurately determine whether the axes of the two are aligned.

[0061] The mounting plate mechanism moves to a preset position (e.g., a position where the mounting plate mechanism can rotate) along the axis of the support rod structure, and the first stepper motor 2 is controlled again to rotate the turntable 3 to adjust the laser rangefinder 1 to a vertical state with the support rod structure. Then the mounting plate mechanism is driven to rotate one circle, and the laser beam is directed directly to the inner wall of the rotary kiln. According to the distance data of each point on the inner wall of the rotary kiln measured by the laser rangefinder 1, the deviation of the coal injection pipe relative to the axis of the rotary kiln is calculated, and then the coaxial calibration is achieved by adjusting the position of the coal injection pipe. In order to deal with the problem of agglomeration or impurities on the inner wall of the rotary kiln interfering with the measurement accuracy, the laser rangefinder 1 can be tilted at different angles through the turntable 3. Multi-angle measurement of different positions on the inner wall of the rotary kiln, comprehensive integration of multiple sets of data, elimination of measurement errors caused by local anomalies, and accurate judgment of the true contour of the inner wall of the rotary kiln and the relative position relationship of the coal injection pipe are ensured.

[0062] 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.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of dry process rotary kiln coal injection pipe efficient positioning instrument, characterized in that: It comprises a support rod structure, one end of which can be connected to the end of a coal injection pipe through a connecting mechanism, the support rod structure is connected to a mounting plate mechanism that can rotate along the axis of the support rod structure, and a laser rangefinder (1) is installed on the mounting plate mechanism; The axis of the support rod structure coincides with the axis of the connection mechanism; a first stepper motor (2) is fixedly connected to one side of the mounting plate mechanism, a turntable (3) is fixedly connected to the output end of the first stepper motor (2), and the laser rangefinder (1) is fixedly mounted on the turntable (3).

2. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 1, characterized in that: The connection structure comprises a fixed plate (4), the edge of the fixed plate (4) is provided with a plurality of notches (5) arranged in an annular manner and at equal intervals, the fixed plate (4) is provided with a plurality of first slideways (6) arranged in an annular manner and at equal intervals, a slider (7) is slidably connected to the first slideway (6), and a clamping block (8) is provided on one side of the slider (7).

3. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 2, characterized in that: The slider (7) is provided with a connecting rod (9), the lower end of which is fixedly connected to a first rack (10); a toothed ring (11) is rotatably sleeved on the support rod structure, and the toothed ring (11) is meshed with the first rack (10).

4. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 3, characterized in that: The support rod structure is provided with a mounting groove (12), a ratchet (13) is provided in the mounting groove (12), and the inner ring of the toothed ring (11) is provided with a ratchet (14) matched with the ratchet (13).

5. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 4, characterized in that: A second rack (15) is fixedly connected to the middle of the connecting rod (9); a gear ring (16) is fixedly connected to the edge of the rotating disk (3); and the gear ring (16) can mesh with the second rack (15).

6. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 5, characterized in that: The support rod structure comprises a fixed tube (17) and a second stepper motor (18); the fixed tube (17) is fixedly connected to the center of one side of the fixed plate (4); a second slideway (19) is provided on the fixed tube (17); the second stepper motor (18) is fixedly connected to the center of the other side of the fixed plate (4); the output end of the second stepper motor (18) is fixedly connected to a screw rod (20), and the screw rod (20) is located in the fixed tube (17); a threaded barrel (21) is threadedly connected to the screw rod (20), and a connecting piece (22) is fixedly connected to the outer surface of the threaded barrel (21), and the connecting piece (22) is slidably connected to the second slideway (19).

7. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 6, characterized in that: The screw rod (20) extends out of the fixed tube (17), and the other end of the screw rod (20) away from the second stepping motor (18) is elastically connected to a limit block (23), and a clamping groove (24) is provided on the limit block (23), and a clamping block (25) capable of clamping with the clamping groove (24) is provided on the threaded cylinder (21).

8. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 7, characterized in that: The mounting plate mechanism comprises a cylinder (26) and a plate body (27), wherein the cylinder (26) is sleeved on the fixing tube (17), and the plate body (27) is fixedly connected to the cylinder (26); The inner wall of the cylinder (26) is fixedly connected to the connecting piece (22).

9. A novel dry process rotary kiln coal injection pipe high efficiency positioning instrument as claimed in claim 8, characterized in that: A plurality of plate bodies (27) are provided, and the plurality of plate bodies (27) are arranged in an annular manner and equidistantly on the outside of the cylinder (26).

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