Center alignment device for grinding roller of coal mill

Abstract

The utility model relates to a coal mill grinding roller center alignment device which comprises a supporting rod, an extension rod and a correction piece, the supporting rod is used for being rotatably installed on a grinding disc of a coal mill in the circumferential direction of the grinding disc, the extension rod and the supporting rod are arranged at an angle, and the first end of the extension rod is adjustably connected to the supporting rod in the length direction of the supporting rod; the correcting piece is adjustably connected to the second end of the extension rod in the length direction of the extension rod, and the correcting piece is used for making contact with the end face of a grinding roller of the coal mill. According to the center alignment device for the grinding rollers of the coal mill, when an operator installs the grinding rollers into the coal mill, the multiple grinding rollers can be aligned conveniently, and accurate installation of the grinding rollers in the coal mill is achieved. Due to the fact that the supporting rod can rotate relative to the grinding disc, and the position of the correcting piece is adjustable, an operator can adjust the positions of the other grinding rollers with the position of one grinding roller as the reference and the correcting piece as the reference, the center alignment process of the grinding rollers in the coal mill is simple, and the alignment efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of center alignment of a grinding roller of a coal mill, and in particular to a center alignment device of a grinding roller of a coal mill. Background Art

[0002] Coal mill is a machine that breaks coal into pieces and grinds them into coal powder. It is an important auxiliary equipment for pulverized coal furnace.

[0003] The grinding roller is an important component in the coal mill. When installing the grinding roller, it is necessary to ensure that the intersection of the rotation axes of multiple grinding rollers is located on the rotation axis of the grinding disc to ensure the coal block crushing effect. In the related art, when installing the grinding roller on the tripod of the coal mill, the operator needs to first find the center of the tripod for installing the grinding roller, and then hang a thin rope at the center of each tripod to measure the distance between the thin rope and the rotation center of the grinding disc (that is, the rotation center of the reduction gearbox rotating shaft of the coal mill). If the distances between the thin ropes hanging from multiple tripods and the rotation center of the grinding disc are not equal, adjust the installation position of the tripod until the distances between the thin ropes hanging from each tripod and the rotation center of the grinding disc are equal, so that the intersection of the rotation axes of multiple grinding rollers installed on the tripod is located on the rotation axis of the grinding disc. The positioning and installation process of the grinding roller in the coal mill is relatively complicated. Utility Model Content

[0004] The purpose of the present invention is to provide a coal mill roller center alignment device to solve the problems existing in the related art.

[0005] In order to achieve the above-mentioned purpose, the present disclosure provides a coal mill roller center alignment device, comprising:

[0006] A support rod, used for being rotatably mounted on the grinding disc of the coal mill along the circumference of the grinding disc;

[0007] An extension rod is arranged at an angle with the support rod, and a first end of the extension rod is adjustably connected to the support rod along the length direction of the support rod;

[0008] A correction piece is adjustably connected to the second end of the extension rod along the length direction of the extension rod, and the correction piece is used to contact the end surface of the grinding roller of the coal mill.

[0009] Optionally, the end surface of the correction member away from the extension rod is formed as an inclined surface, the inclined surface is arranged to be parallel to the end surface of the grinding roller, and the inclined surface is used to fit with the end surface of the grinding roller.

[0010] Optionally, the correction member is detachably connected to the extension rod.

[0011] Optionally, the correction member comprises a first sleeve and a correction portion, wherein the first sleeve is movably sleeved on the second end of the extension rod, and the correction portion is located at an end of the first sleeve away from the extension rod and is used to contact the end surface of the grinding roller;

[0012] The first sleeve is formed with a plurality of first threaded holes arranged at intervals along the length direction of the first sleeve. The coal mill roller center alignment device also includes a plurality of first locking bolts. The plurality of first locking bolts are arranged in one-to-one correspondence with the plurality of first threaded holes. Each of the first locking bolts is threadedly connected with the corresponding first threaded hole. The first locking bolts are used to press the outer circumferential surface of the extension rod against the inner circumferential surface of the first sleeve.

[0013] Optionally, a second sleeve is provided at the first end of the extension rod, and the second sleeve is movably sleeved on an end of the support rod away from the grinding disc;

[0014] The second sleeve is formed with a plurality of second threaded holes arranged at intervals along the length direction of the second sleeve. The coal mill roller center alignment device also includes a plurality of second locking bolts. The plurality of second locking bolts are arranged in a one-to-one correspondence with the plurality of second threaded holes. The second locking bolts are used to press the outer circumferential surface of the support rod against the inner circumferential surface of the second sleeve.

[0015] Optionally, a first reinforcing rib is connected between the second sleeve and the extension rod.

[0016] Optionally, a scale is provided on the outer circumferential surface of the extension rod.

[0017] Optionally, the coal mill roller center alignment device further comprises a mounting seat, a mounting hole is formed on the mounting seat, the mounting seat is used to be arranged at the conical cover mounting portion of the grinding disc, and the mounting hole is used to be connected to the conical cover connecting hole on the conical cover mounting portion;

[0018] The support rod is rotatably connected to the mounting seat.

[0019] Optionally, the mounting seat comprises a plate body, a third sleeve and an end cover, the plate body is used to be arranged at the cone cover mounting portion, and the mounting hole is formed on the plate body;

[0020] The third sleeve is formed on the plate body, one end of the support rod extends into the third sleeve, and a bearing is connected between the support rod and the third sleeve;

[0021] The end cover is sleeved on the support rod and is threadedly connected to an end of the third sleeve away from the plate body.

[0022] Optionally, a second reinforcing rib is connected between the third sleeve and the plate body.

[0023] Through the above technical scheme, since the support rod can rotate relative to the grinding disc and the position of the correction piece is adjustable, the operator can use the position of one grinding roller as a reference, first make the correction piece contact with the end face of the grinding roller, and then rotate the correction piece to the position of the remaining grinding rollers, and adjust the positions of the remaining grinding rollers based on the correction piece. The center alignment of the grinding rollers can be completed by making the end faces of the remaining grinding rollers contact with the correction piece. There is no need to hang a thin rope on the center of the tripod on which the grinding rollers are installed, and repeatedly measure the distance between the thin rope and the rotation center of the grinding disc to determine whether multiple grinding rollers are aligned. This makes the center alignment process of the grinding rollers in the coal mill relatively simple and the alignment efficiency is high, which can improve the adjustment efficiency of the grinding rollers during installation.

[0024] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a coal mill roller center alignment device provided in an exemplary embodiment of the present disclosure.

[0027] Figure 2 It is a cross-sectional view of a coal mill roller center alignment device provided by an exemplary embodiment of the present disclosure.

[0028] Figure 3 It is a schematic diagram of centering a grinding roller of a coal mill using a centering device for grinding roller of an exemplary embodiment of the present disclosure, wherein the correction piece is in contact with the end face of the grinding roller on the right side of the figure.

[0029] Figure 4 It is a schematic diagram of a coal mill roller center alignment device provided by an exemplary embodiment of the present disclosure when centering the roller, wherein the end face of the roller on the left side of the figure cannot contact the correction piece.

[0030] Figure 5 It is a schematic diagram of a coal mill roller center alignment device provided by an exemplary embodiment of the present disclosure when centering the roller, wherein the end face of the roller on the left side of the figure can contact the correction part after adjusting the position.

[0031] Description of Reference Numerals

[0032] 200-grinding roller; 100-coal mill grinding roller center alignment device; 10-support rod; 20-extension rod; 21-second sleeve; 211-second threaded hole; 22-first reinforcing rib; 30-correction piece; 31-first sleeve; 311-first threaded hole; 32-correction part; 33-inclined surface; 40-first locking bolt; 50-second locking bolt; 60-mounting seat; 61-mounting hole; 62-plate body; 63-third sleeve; 64-end cover; 65-bearing; 66-second reinforcing rib. DETAILED DESCRIPTION

[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0034] In the present disclosure, unless otherwise stated, the directions or positional relationships indicated by the directional words such as "upper" and "lower", etc., are defined based on the upper and lower positions of the coal mill roller center alignment device in use. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, and a specific directional structure and operation. Therefore, they cannot be understood as a limitation on the present disclosure. The terms "inside and outside" refer to the inside and outside of the corresponding structural contour.

[0035] In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element, and do not have order or importance. In addition, in the description with reference to the drawings, the same number in different drawings represents the same element.

[0036] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0037] like Figures 1 to 5 As shown, the present disclosure provides a coal mill grinding roller center alignment device 100, including a support rod 10, an extension rod 20 and a correction piece 30, the support rod 10 is used to be rotatably installed on the grinding disc of the coal mill along the circumference of the grinding disc, the extension rod 20 is set at an angle to the support rod 10, the first end of the extension rod 20 is adjustably connected to the support rod 10 along the length direction of the support rod 10, the correction piece 30 is adjustably connected to the second end of the extension rod 20 along the length direction of the extension rod 20, and the correction piece 30 is used to contact the end surface of the grinding roller 200 of the coal mill.

[0038] It should be noted that the center alignment of the grinding roller 200 (also called grinding roller 200 centering or grinding roller 200 centering) means that the intersection of the rotation axes of the multiple grinding rollers 200 of the coal mill is located on the rotation axis of the grinding disc. When the intersection of the rotation axes of the multiple grinding rollers 200 is located on the rotation axis of the grinding disc, the rotation center points of the multiple grinding rollers 200 are located on the same horizontal plane. For details, please refer to Figure 5 shown.

[0039] When the above-mentioned coal mill roller center alignment device 100 is used to center the grinding roller 200 of the coal mill, the operator can first install multiple grinding rollers 200 in the coal mill through corresponding tripods, and then install the coal mill roller center alignment device 100 provided by the present disclosure on the grinding disc. Figure 3 As shown, by adjusting the position of the extension rod 20 along the length direction of the support rod 10, and by adjusting the position of the correction piece 30 along the length direction of the extension rod 20, the correction piece 30 is made to contact the end surface of any one of the multiple grinding rollers 200 on the side close to the grinding roller 200 (the first grinding roller 200 that contacts the correction piece 30 is hereinafter referred to as the reference grinding roller), and then the support rod 10 is rotated to rotate the correction piece 30 to the position where the other grinding rollers 200 are located. Since the rotation axis of the other grinding rollers 200 and the rotation axis of the reference grinding roller do not intersect with the rotation axis of the grinding disc, that is, the rotation center of the other grinding rollers 200 and the rotation center of the reference grinding roller are not located in the same horizontal plane, the correction piece 30 will not contact the end surface of the other grinding rollers 200 (see Figure 4 As shown), by observing whether the correction piece 30 can contact the end surface of other grinding rollers 200, it can be judged whether other grinding rollers 200 in the coal mill are aligned with the reference grinding roller. If the correction piece 30 can contact the end surface of other grinding rollers 200, it means that other grinding rollers 200 have been aligned with the reference grinding roller. If the correction piece 30 cannot contact the end surface of other grinding rollers 200, it means that other grinding rollers 200 are not aligned with the reference grinding roller, and the position of other grinding rollers needs to be adjusted until their end surfaces can contact the correction piece 30 (see Figure 5 As shown, finally, the intersection points of the rotation axes of the plurality of grinding rollers 200 are all located on the rotation axis of the grinding disc, thereby realizing the center alignment of the coal mill grinding rollers 200.

[0040] Through the above technical solution, since the support rod 10 can rotate relative to the grinding disc and the position of the correction piece 30 is adjustable, the operator can use the position of one grinding roller 200 as a reference, first make the correction piece 30 contact with the end face of the grinding roller 200, and then rotate the correction piece 30 to the position of the remaining grinding rollers 200, and adjust the positions of the remaining grinding rollers 200 based on the correction piece 30 so that the end faces of the remaining grinding rollers 200 contact with the correction piece 30 to complete the center alignment of the grinding rollers. There is no need to hang a thin rope on the center of the tripod on which the grinding rollers are installed, and repeatedly measure the distance between the thin rope and the rotation center of the grinding disc to determine whether multiple grinding rollers 200 are aligned, so that the center alignment process of the grinding roller 200 in the coal mill is relatively simple, the alignment efficiency is high, and the adjustment efficiency of the grinding roller 200 during installation can be improved.

[0041] The present disclosure does not limit the specific contact method between the correction member 30 and the end surface of the grinding roller 200 of the coal mill when the grinding roller center alignment device 100 is in use. The correction member 30 and the end surface of the grinding roller 200 may be in point contact, line contact, or surface contact. As an embodiment of the present disclosure, Figures 1 to 4 As shown, the end surface of the correction member 30 away from the extension rod 20 is formed as an inclined surface 33 , which is arranged to be parallel to the end surface of the grinding roller 200 , and is used to fit the end surface of the grinding roller 200 .

[0042] Here, it should be noted that the end face of the correction piece 30 away from the extension rod 20 is set as an inclined surface 33 parallel to the end face of the grinding roller 200, which means that when the coal mill grinding roller center alignment device 100 is in use, that is, in the process of centering the grinding roller 200, the inclined surface 33 of the correction piece 30 is parallel to the end face of the grinding roller 200.

[0043] By setting the end face of the correction piece 30 that contacts the end face of the grinding roller 200 as a slope 33 parallel to the end face of the grinding roller 200, the contact area between the correction piece 30 and the end face of the grinding roller 200 can be increased. The inclined slope 33 matched with the end face of the grinding roller 200 is helpful for the operator to observe the relative position between the correction piece 30 and the grinding roller 200, thereby judging whether the grinding roller 200 is in contact with the correction piece 30.

[0044] Optionally, the correction member 30 may be an inclined plate that is disposed obliquely, and the inclined plate may have an inclined surface 33 that is parallel to the end surface of the grinding roller 200 .

[0045] Optionally, the correction member 30 is detachably connected to the extension rod 20. In other words, the correction member 30 can be detachably connected to the extension rod 20 and can be adjusted in position along the length direction of the extension rod 20.

[0046] On the one hand, the detachable correction part 30 allows the operator to replace the correction part 30 with a new one when the correction part 30 is damaged, instead of replacing the entire coal mill roller center alignment device 100, thereby reducing the use cost and maintenance cost of the coal mill roller center alignment device 100; on the other hand, the detachable correction part 30 allows the operator to replace different types of correction parts 30 when centering the rollers of different types of coal mills, thereby meeting the requirements for releasing the end faces of different types of coal mill rollers 200 from the correction part 30, thereby improving the versatility of the coal mill roller center alignment device 100.

[0047] The correction member 30 can be detachably and positionally adjustable connected to the extension rod 20 in any appropriate manner, and the present disclosure is not limited thereto. For example, in an exemplary embodiment provided by the present disclosure, Figure 1 and Figure 2 As shown, the correction member 30 includes a first sleeve 31 and a correction portion 32. The first sleeve 31 is movably sleeved on the second end of the extension rod 20. The correction portion 32 is located at an end of the first sleeve 31 away from the extension rod 20 and is used to contact the end surface of the grinding roller 200. The first sleeve 31 is formed with a plurality of first threaded holes 311 arranged at intervals along the length direction of the first sleeve 31. The coal mill grinding roller center alignment device 100 also includes a plurality of first locking bolts 40. The plurality of first locking bolts 40 are arranged in a one-to-one correspondence with the plurality of first threaded holes 311. Each first locking bolt 40 is threadedly connected to the corresponding first threaded hole 311. The first locking bolts 40 are used to press the outer circumferential surface of the extension rod 20 against the inner circumferential surface of the first sleeve 31.

[0048] In this way, when it is necessary to adjust the installation position of the correction piece 30 on the extension rod 20, the operator can loosen the multiple first locking bolts 40 tightened on the outer peripheral surface of the extension rod 20, so that the correction piece 30 can be moved toward the extension rod 20 or away from the extension rod 20, so that the correction piece 30 can contact the end face of the grinding roller 200. When the correction piece 30 is adjusted into place, the operator can rotate the multiple first locking bolts 40 so that the multiple first locking bolts 40 are pressed against the outer peripheral surface of the extension rod 20, thereby fixing the position of the correction piece 30 on the extension rod 20. The position adjustment of the correction piece 30 on the extension rod 20 is relatively convenient, and the locking is reliable.

[0049] In other embodiments, the extension rod 20 may also be provided with a plurality of first connection holes spaced apart along the length direction of the extension rod 20 , and a bolt may pass through the correction member 30 and be connected to any of the first connection holes.

[0050] The extension rod 20 can be connected to the support rod 10 in an adjustable manner in any appropriate manner, and the present disclosure is not limited to this. For example, in an exemplary embodiment provided in the present disclosure, Figure 1 and Figure 2 As shown, a second sleeve 21 is provided at the first end of the extension rod 20, and the second sleeve 21 is movably sleeved on the end of the support rod 10 away from the grinding disc. A plurality of second threaded holes 211 arranged at intervals along the length direction of the second sleeve 21 are formed on the second sleeve 21. The coal mill roller center alignment device 100 also includes a plurality of second locking bolts 50, and the plurality of second locking bolts 50 are arranged in a one-to-one correspondence with the plurality of second threaded holes 211. The second locking bolts 50 are used to press the outer circumferential surface of the support rod 10 against the inner circumferential surface of the second sleeve 21.

[0051] In this way, when it is necessary to adjust the installation position of the extension rod 20 on the support rod 10, the operator can loosen the multiple second locking bolts 50 tightened on the outer peripheral surface of the support rod 10, so that the extension rod 20 can move toward the direction close to the grinding wheel or away from the grinding wheel, so that the height of the correction piece 30 installed on the extension rod 20 can be roughly the same as the height of the grinding roller 200, so that the correction piece 30 can contact the end surface of the grinding roller 200. When the position of the extension rod 20 on the support rod 10 is adjusted into place, the operator can rotate the multiple second locking bolts 50 so that the multiple second locking bolts 50 are pressed against the outer peripheral surface of the support rod 10, thereby fixing the position of the extension rod 20 on the support rod 10. The position adjustment of the extension rod 20 on the support rod 10 is more convenient and the locking is reliable.

[0052] In other embodiments, a plurality of second connection holes spaced apart along the length direction of the support rod 10 may be provided on the support rod 10 , and a bolt may pass through the extension rod 20 and be connected to any of the second connection holes.

[0053] In order to improve the connection strength between the second sleeve 21 and the extension rod 20, optionally, as Figures 1 to 4 As shown, a first reinforcing rib 22 is connected between the second sleeve 21 and the extension rod 20 .

[0054] By arranging the first reinforcing rib 22 between the second sleeve 21 and the extension rod 20, the bending and deformation resistance of the connection between the second sleeve 21 and the extension rod 20 is effectively improved, and the situation that the second sleeve 21 and the extension rod 20 are disconnected during the use of the coal mill roller center alignment device 100 due to the influence of the gravity of the extension rod 20 and / or the correction part 30 themselves and the influence of external forces, and the coal mill roller center alignment device 100 cannot be used normally is effectively avoided.

[0055] In order to further facilitate the center alignment of the grinding roller 200, optionally, a scale is provided on the outer peripheral surface of the extension rod 20. In this way, when the operator performs center alignment on the grinding roller 200, the operator can estimate the installation position deviation value of the grinding roller 200 that is not in contact with the correction member 30 according to the scale on the extension rod 20, and adjust the installation position of the grinding roller 200 according to the obtained deviation value.

[0056] In order to facilitate the installation of the support rod 10 on the grinding disc of the coal mill, optionally, as Figures 1 to 4 As shown, the coal mill roller center alignment device 100 also includes a mounting seat 60, which is formed with a mounting hole 61. The mounting seat 60 is used to be set at the conical cover mounting portion of the grinding disc, and the mounting hole 61 is used to connect with the conical cover connecting hole on the conical cover mounting portion. The support rod 10 is rotatably connected to the mounting seat 60.

[0057] By rotatably mounting the support rod 10 on the mounting seat 60, the support rod 10 can be rotatably mounted on the grinding disc of the coal mill, so that the extension rod 20 and the correction member 30 mounted on the support rod 10 can be rotated by rotating the support rod 10, so that the correction member 30 can respectively contact the multiple grinding rollers 200 in the coal mill, and respectively detect and adjust the installation positions of the grinding rollers 200, so that the intersection points of the rotation axes of all the grinding rollers 200 in the coal mill are located on the same axis with the rotation center of the grinding disc, thereby realizing the center alignment of the coal mill grinding rollers 200.

[0058] Furthermore, since the mounting hole 61 on the mounting seat 60 is used to connect with the conical cover connecting hole on the conical cover mounting portion, in the process of centering the coal mill roller 200, there is no need to separately set the mounting position of the mounting seat 60 inside the coal mill. The coal mill roller centering alignment device 100 can be installed by simply removing the conical cover of the coal mill. The coal mill roller centering alignment device 100 is relatively convenient to use.

[0059] In addition, since the mounting seat 60 is used to connect with the conical cover connecting hole on the conical cover mounting part, when the center of the grinding roller 200 is aligned, the mounting seat 60 can also cover the reduction gearbox installed under the conical cover, effectively preventing the operator from falling from the conical cover mounting part of the grinding disc during the calibration process, which may easily cause injury to the operator.

[0060] The present disclosure does not limit the specific structure of the mounting seat 60, as long as the mounting seat 60 can rotatably mount the support rod 10 on the grinding disc of the coal mill. As an embodiment of the present disclosure, Figure 2As shown, the mounting seat 60 includes a plate body 62, a third sleeve 63 and an end cover 64. The plate body 62 is used to be set at the conical cover mounting portion. The mounting hole 61 is formed on the plate body 62. The third sleeve 63 is formed on the plate body 62. One end of the support rod 10 extends into the third sleeve 63. A bearing 65 is connected between the support rod 10 and the third sleeve 63. The end cover 64 is sleeved on the support rod 10 and is threadedly connected to one end of the third sleeve 63 away from the plate body 62.

[0061] The support rod 10 is rotatably mounted in the third sleeve 63 on the mounting seat 60 through the bearing 65. Rolling friction can be formed between the support rod 10 and the mounting seat 60. The friction between the support rod 10 and the mounting seat 60 is relatively small, which effectively avoids direct contact between the support rod 10 and the mounting seat 60. If the friction between the support rod 10 and the mounting seat 60 is relatively large, the support rod 10 is prone to getting stuck on the mounting seat 60, making it difficult to rotate.

[0062] In order to improve the strength of the mounting base 60, optionally, as Figure 1 and Figure 2 As shown, a second reinforcing rib 66 is connected between the third sleeve 63 and the plate body 62. By arranging the second reinforcing rib 66 between the third sleeve 63 and the plate body 62, the bending resistance and deformation resistance of the connection between the third sleeve 63 and the plate body 62 can be effectively improved, so as to effectively avoid the situation that the coal mill roller centering device 100 cannot be used normally due to the large mass of the support rod 10, the extension rod 20 and the correction member 30 themselves and the influence of external forces during the use of the coal mill roller centering device 100, resulting in the mounting seat 60 being unable to support the entire coal mill roller 200 centering device.

[0063] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0065] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A coal mill roller center alignment device, characterized in that: include: A support rod, used for being rotatably mounted on the grinding disc of the coal mill along the circumference of the grinding disc; An extension rod is arranged at an angle with the support rod, and a first end of the extension rod is adjustably connected to the support rod along the length direction of the support rod; A correction piece is adjustably connected to the second end of the extension rod along the length direction of the extension rod, and the correction piece is used to contact the end surface of the grinding roller of the coal mill.

2. The coal mill roller center alignment device according to claim 1 is characterized in that: The end surface of the correction member away from the extension rod is formed into an inclined surface, and the inclined surface is arranged to be parallel to the end surface of the grinding roller, and the inclined surface is used to fit with the end surface of the grinding roller.

3. The coal mill roller center alignment device according to claim 1, characterized in that: The correction piece is detachably connected to the extension rod.

4. The coal mill roller center alignment device according to claim 3 is characterized in that: The correction member comprises a first sleeve and a correction part, wherein the first sleeve is movably sleeved on the second end of the extension rod, and the correction part is located at an end of the first sleeve away from the extension rod and is used to contact the end surface of the grinding roller; The first sleeve is formed with a plurality of first threaded holes arranged at intervals along the length direction of the first sleeve. The coal mill roller center alignment device also includes a plurality of first locking bolts. The plurality of first locking bolts are arranged in one-to-one correspondence with the plurality of first threaded holes. Each of the first locking bolts is threadedly connected with the corresponding first threaded hole. The first locking bolts are used to press the outer circumferential surface of the extension rod against the inner circumferential surface of the first sleeve.

5. The coal mill roller center alignment device according to claim 1, characterized in that: A second sleeve is disposed at the first end of the extension rod, and the second sleeve is movably sleeved on an end of the support rod away from the grinding disc; The second sleeve is formed with a plurality of second threaded holes arranged at intervals along the length direction of the second sleeve. The coal mill roller center alignment device also includes a plurality of second locking bolts. The plurality of second locking bolts are arranged in a one-to-one correspondence with the plurality of second threaded holes. The second locking bolts are used to press the outer circumferential surface of the support rod against the inner circumferential surface of the second sleeve.

6. The coal mill roller center alignment device according to claim 5, characterized in that: A first reinforcing rib is connected between the second sleeve and the extension rod.

7. The device for centering a coal mill roller according to any one of claims 1 to 6, characterized in that: The outer peripheral surface of the extension rod is provided with scales.

8. The device for centering a coal mill roller according to any one of claims 1 to 6, characterized in that: The coal mill roller center alignment device further comprises a mounting seat, a mounting hole is formed on the mounting seat, the mounting seat is used to be arranged at the conical cover mounting portion of the grinding disc, and the mounting hole is used to be connected with the conical cover connecting hole on the conical cover mounting portion; The support rod is rotatably connected to the mounting seat.

9. The coal mill roller center alignment device according to claim 8, characterized in that: The mounting seat comprises a plate body, a third sleeve and an end cover, the plate body is used to be arranged at the cone cover mounting portion, and the mounting hole is formed on the plate body; The third sleeve is formed on the plate body, one end of the support rod extends into the third sleeve, and a bearing is connected between the support rod and the third sleeve; The end cover is sleeved on the support rod and is threadedly connected to an end of the third sleeve away from the plate body.

10. The coal mill roller center alignment device according to claim 9, characterized in that: A second reinforcing rib is connected between the third sleeve and the plate body.

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