Detachable adjusting, centering and aligning device for long-distance coupler
By designing a modular coupling alignment device, and utilizing a combination of a detachable adjusting arm and a dial indicator, the problem of complex structure and poor portability of long-distance coupling alignment tools was solved, achieving fast and accurate alignment results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINCHUAN GRP MACHINERY MFG
- Filing Date
- 2025-06-25
- Publication Date
- 2026-05-08
AI Technical Summary
Long-distance coupling alignment tools are complex in structure and poorly portable, requiring customized special tools to extend maintenance cycles. Traditional measurement methods are inaccurate, cumbersome to operate, and have unstable measurement benchmarks for multiple specifications, resulting in poor adjustability.
A modular device was designed, including a vertically adjustable connecting arm, a horizontally fixed arm, a horizontally adjusting arm, a vertically adjusting arm, a vertically supporting arm, and a dial indicator. The locking connection components enable quick assembly and disassembly, adapting to the precise measurement of couplings of different specifications.
It enables rapid and accurate alignment of long-distance couplings, simplifies the operation process, improves portability and measurement accuracy, and reduces operating costs and time.
Smart Images
Figure CN224216031U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coupling alignment technology, specifically a detachable and adjustable alignment device for long-distance couplings. Background Technology
[0002] In mechanical transmission systems, couplings are widely used as key transmission components. Practice shows that insufficient alignment accuracy of couplings in mechanical transmission equipment can lead to a series of hidden dangers in equipment operation: abnormal noise and vibration during operation, resulting in loosening of connecting bolts, premature bearing damage, and accelerated wear of the coupling itself; simultaneously, it will increase the transmission resistance of the equipment, cause abnormal operating current, reduce operating efficiency, increase the failure rate of mechanical equipment, and significantly shorten the service life of the equipment. Therefore, accurate alignment of couplings in equipment such as pumps and motors has become an indispensable core procedure in equipment installation and maintenance.
[0003] In routine equipment maintenance and repair, the alignment of long-distance couplings presents the following problems: When the coupling spacing is too large, existing tools are mostly complex, integral structures that are bulky and poorly portable, making on-site handling and relocation extremely inconvenient. When dealing with couplings of different specifications and spacings, it is necessary to repeatedly customize special tools, which not only significantly extends the maintenance cycle but also leads to a surge in operating costs. Furthermore, under long-distance operating conditions, traditional measurement methods struggle to accurately obtain core data such as radial deviation and upper / lower opening, resulting in cumbersome operating procedures and high error rates, hindering the efficiency of precise equipment alignment. This is especially true when dealing with the differentiated needs of multi-specification couplings, where unstable measurement benchmarks and poor adjustment adaptability further exacerbate the operational difficulties. Utility Model Content
[0004] The purpose of this utility model is to provide a detachable and adjustable alignment device for long-distance couplings, which solves the problems of complex tool structure, poor portability, need for customized special tools to extend maintenance cycle and increase cost, inaccurate data from traditional measurement methods, cumbersome operation, high error rate, unstable measurement benchmark under multiple specifications, and poor adjustment adaptability in long-distance coupling alignment.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a detachable and adjustable centering and alignment device for long-distance couplings, comprising two spaced-apart half-couplings, and further comprising a vertically adjustable connecting arm, a horizontally fixed arm, a horizontally adjusting arm, a vertically adjusting arm, a vertically supporting arm, a first dial indicator, a second dial indicator, and a locking connection assembly; the vertically adjustable connecting arm is connected to one half-coupling, the vertically adjusting arm is located on one side of the other half-coupling, and the other half-coupling is located between the horizontally adjusting arm and the horizontally fixed arm; one end of the horizontally fixed arm is inserted into the bottom of one side of the vertically adjustable connecting arm; the horizontally adjusting arm is inserted into the vertically adjustable connecting arm, the vertically supporting arm, and the vertically adjusting arm, and can move along the vertically adjustable connecting arm, the vertically supporting arm, and the vertically fixed arm. The vertical support arm moves vertically along the length of the adjusting arm; the vertical support arm is located between the vertically adjustable connecting arm and the vertical adjusting arm; one end of both the vertical adjusting arm and the vertical support arm is inserted into the horizontal fixed arm, and the other end of both extends through the horizontal adjusting arm to one side; the vertical adjusting arm can move horizontally along the length of the horizontal fixed arm and the horizontal adjusting arm; the connections between the horizontal adjusting arm and the horizontal fixed arm and the vertically adjustable connecting arm, the connection between the vertical support arm and the horizontal adjusting arm, and the connection between the vertical adjusting arm and the horizontal fixed arm are all connected by locking connection components; the first dial indicator is installed on the vertical adjusting arm and located between the horizontal adjusting arm and the horizontal fixed arm, and the second dial indicator is installed on the horizontal adjusting arm and located between the vertical adjusting arm and the other half coupling.
[0006] Furthermore, the locking connection assembly consists of two vertically spaced first connectors, second connectors, third connectors, fourth connectors, and fifth connectors.
[0007] Furthermore, the vertically adjustable connecting arm includes a vertical connecting square tube, first vertical openings respectively provided on both sides of the vertical connecting square tube, second vertical openings respectively provided on the other two sides of the vertical connecting square tube, and a rectangular opening provided at the bottom of one side of the vertical connecting square tube. Both of the first connecting parts pass through the two first vertical openings and are connected to a half coupling.
[0008] Furthermore, the transverse fixing arm includes a transverse fixing square tube, a third transverse opening respectively provided on both sides of the transverse fixing square tube, and a fourth transverse opening provided on the inner side of the transverse fixing square tube; one end of the transverse fixing square tube passes through the rectangular opening and extends into the interior of the vertical connecting square tube.
[0009] Furthermore, both the outer walls of the vertical connecting square tube and the horizontal fixing square tube are equipped with bubble level gauges.
[0010] Furthermore, the vertical adjustment arm includes a vertical adjustment square tube, third vertical openings respectively located on both sides of the vertical adjustment square tube, and fourth vertical openings respectively located on the other two sides of the vertical adjustment square tube. The contacts of the first dial indicator pass through two fourth vertical openings and abut against one end of another half-coupling. Two seventh connectors are tightly fitted to the outer wall of the contacts of the first dial indicator. Both seventh connectors pass through two third vertical openings and extend to one side of the vertical adjustment square tube. One end of the vertical adjustment square tube passes through a fourth horizontal opening and extends into the interior of a horizontal fixed square tube. One end of the fifth connector passes through two third horizontal openings and the vertical adjustment square tube and extends to one side of the horizontal fixed square tube.
[0011] Furthermore, the lateral adjustment arm includes a lateral adjustment square tube, first lateral openings respectively disposed on both sides of the lateral adjustment square tube, and a plurality of equally spaced adjustment holes, and second lateral openings respectively disposed on the other two sides of the lateral adjustment square tube. The plurality of adjustment holes are spaced apart from the first lateral openings, and the second lateral openings correspond to the plurality of adjustment holes. The contact of the second dial indicator passes through two vertically arranged adjustment holes and abuts against the outer wall of the other half coupling. Two sixth connectors are tightly fitted to the outer wall of the contact of the second dial indicator. Both of the sixth connectors pass through the two second lateral openings and extend to one side of the lateral adjustment square tube. The other end of the vertical adjustment square tube passes through the two first lateral openings and extends to one side of the lateral adjustment square tube. One end of the lateral adjustment square tube passes through the two first vertical openings and extends to one side of the vertical connecting square tube. The third connector passes through the two second vertical openings and the lateral adjustment square tube and extends to one side of the vertical connecting square tube.
[0012] Furthermore, the vertical support arm includes a vertical support square tube and five vertical openings respectively provided on both sides of the vertical support square tube. One end of the vertical support square tube is embedded in one side of the horizontal fixed square tube, and the other end of the vertical support square tube passes through the horizontal adjusting square tube and extends to one side of it. The fourth connector passes through the horizontal adjusting square tube and the two fifth vertical openings and extends to one side of the horizontal adjusting square tube.
[0013] Furthermore, the first, second, third, fourth, fifth, sixth, and seventh connecting parts are all composed of bolts and nuts that are threadedly engaged with the bolts.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0015] This invention achieves rapid modular assembly on-site through the coordinated operation of a vertically adjustable connecting arm, a horizontally fixed arm, a horizontally adjusting arm, a vertically adjusting arm, a vertically supporting arm, a first dial indicator, a second dial indicator, and a locking connection assembly. After disassembly, each component is portable and easy to store, solving the problem of bulky traditional tools. Based on the detachable and adjustable component design, during use, only the positions of the vertically adjustable connecting arm, horizontally fixed arm, horizontally adjusting arm, vertically adjusting arm, and vertically supporting arm need to be adjusted according to the actual specifications of the coupling. After installing the first and second dial indicators and rotating the single-end half-coupling, precise measurements of axial clearance, vertical opening, and lateral deviation can be completed simultaneously, eliminating the complex and repeated calibration procedures in traditional processes. This device has advantages such as simple operation, accurate measurement, and strong adaptability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the detachable and adjustable centering and alignment device for long-distance couplings of this utility model.
[0017] Figure 2 This is a schematic diagram of the detachable and adjustable centering and alignment device for long-distance couplings of this utility model.
[0018] Figure 3 This is a schematic diagram of the detachable and adjustable centering and alignment device for long-distance couplings of this utility model.
[0019] Figure 4 This is a schematic diagram of the detachable and adjustable centering and alignment device for long-distance couplings according to this utility model.
[0020] In the diagram: 1. Half coupling; 2. Vertical connecting square tube; 3. First vertical opening; 4. Second vertical opening; 5. First connector; 6. Rectangular opening; 7. Horizontal adjusting square tube; 8. First horizontal opening; 9. Vertical adjusting square tube; 10. Third vertical opening; 11. First dial indicator; 12. Second dial indicator; 13. Second horizontal opening; 14. Horizontal fixed square tube; 15. Third horizontal opening; 16. Second connector; 17. Third connector; 18. Vertical support square tube; 19. Fourth connector; 20. Fifth connector; 21. Adjustment hole; 22. Sixth connector; 23. Seventh connector; 24. Fourth vertical opening; 25. Fifth vertical opening; 26. Fourth horizontal opening; 27. Vertical adjustable connecting arm; 28. Horizontal adjusting arm; 29. Vertical support arm; 30. Horizontal fixed arm; 31. Vertical adjusting arm. Detailed Implementation
[0021] Please see Figure 1-4A long-distance coupling with a detachable and adjustable alignment device includes two spaced-apart half-couplings 1, a vertically adjustable connecting arm 27, a horizontally fixed arm 30, a horizontally adjusting arm 28, a vertically adjusting arm 31, a vertically supporting arm 29, a first dial indicator 11, a second dial indicator 12, and a locking connection assembly. The vertically adjustable connecting arm 27 is connected to one half-coupling 1, and the vertically adjusting arm 31 is located on one side of the other half-coupling 1. The other half-coupling 1 is located between the horizontally adjusting arm 28 and the horizontally fixed arm 30. One end of the horizontally fixed arm 30 is inserted into the bottom side of one side of the vertically adjustable connecting arm 27. The horizontally adjusting arm 28 is inserted into the vertically adjustable connecting arm 27, the vertically supporting arm 29, and the vertically adjusting arm 31, and can move vertically along the length direction of the vertically adjustable connecting arm 27, the vertically supporting arm 29, and the vertically adjusting arm 31. The vertical support arm 29 is located between the vertical adjustable connecting arm 27 and the vertical adjusting arm 31. One end of both the vertical adjusting arm 31 and the vertical support arm 29 is inserted into the horizontal fixed arm 30, and the other end of both passes through the horizontal adjusting arm 28 and extends to one side of it. The vertical adjusting arm 31 can move horizontally along the length of the horizontal fixed arm 30 and the horizontal adjusting arm 28. The connection points between the horizontal adjusting arm 28 and the horizontal fixed arm 30 and the vertical adjustable connecting arm 27, the connection point between the vertical support arm 29 and the horizontal adjusting arm 28, and the connection point between the vertical adjusting arm 31 and the horizontal fixed arm 30 are all connected by locking connection components. The first dial indicator 11 is set on the vertical adjusting arm 31 and is located between the horizontal adjusting arm 28 and the horizontal fixed arm 30. The second dial indicator 12 is set on the horizontal adjusting arm 28 and is located between the vertical adjusting arm 31 and the other half coupling 1.
[0022] The locking connection assembly consists of two vertically spaced first connector 5, second connector 16, third connector 17, fourth connector 19 and fifth connector 20.
[0023] The vertically adjustable connecting arm 27 includes a vertical connecting square tube 2, first vertical openings 3 on both sides of the vertical connecting square tube 2, second vertical openings 4 on the other two sides of the vertical connecting square tube 2, and a rectangular opening 6 at the bottom of one side of the vertical connecting square tube 2. Two first connecting pieces 5 pass through the two first vertical openings 3 and are connected to a half-coupling 1. The first vertical openings 3 on both sides of the vertical connecting square tube 2 and the first connecting pieces 5 are fastened to the flange of the half-coupling 1 by bolt and nut assemblies passing through the first vertical openings 3, which can adapt to the installation requirements of couplings of different specifications.
[0024] The horizontal fixing arm 30 includes a horizontal fixing square tube 14, a third horizontal opening 15 respectively provided on both sides of the horizontal fixing square tube 14, and a fourth horizontal opening 26 provided on the inner side of the horizontal fixing square tube 14; one end of the horizontal fixing square tube 14 passes through the rectangular opening 6 and extends into the interior of the vertical connecting square tube 2.
[0025] Bubble level instruments are installed on the outer walls of both the vertical connecting square tube 2 and the horizontal fixed square tube 14. By observing the position of the bubble, operators can quickly determine whether the vertical connecting square tube 2 and the horizontal fixed square tube 14 are in a horizontal state, avoiding measurement benchmark shifts caused by device tilting.
[0026] The vertical adjustment arm 31 includes a vertical adjustment square tube 9, third vertical openings 10 respectively opened on both sides of the vertical adjustment square tube 9, and fourth vertical openings 24 respectively provided on the other two sides of the vertical adjustment square tube 9. The contacts of the first dial indicator 11 pass through the two fourth vertical openings 24 and abut against one end of the other half coupling 1. The outer wall of the contacts of the first dial indicator 11 is tightly fitted with two seventh connectors 23. Both seventh connectors 23 pass through the two third vertical openings 10 and extend to one side of the vertical adjustment square tube 9. One end of the vertical adjustment square tube 9 passes through the fourth horizontal opening 26 and extends into the interior of the horizontal fixed square tube 14. One end of the fifth connector 20 passes through the two third horizontal openings 15 and the vertical adjustment square tube 9 and extends to one side of the horizontal fixed square tube 14. One end of the vertical adjustment square tube 9 is inserted into the horizontal fixing square tube 14. With the locking mechanism of the fifth connector 20 passing through the third horizontal opening 15, a displacement adjustment of ±150mm can be achieved in the horizontal direction, adapting to the alignment requirements of couplings with different spacings. The third vertical opening 10 and the fourth vertical opening 24 on both sides fix the contact of the first dial indicator 11 through the seventh connector 23, allowing the first dial indicator 11 to make a vertical height adjustment of 0-300mm, ensuring that the contact remains in perpendicular contact with the end face of the coupling. This structure achieves detachability through the insertion of the vertical adjustment square tube 9, and solves the problem of poor adaptability caused by the non-adjustable height in traditional long-distance measurement by the cooperation of the fourth vertical opening 24 and the seventh connector 23.
[0027] The horizontal adjustment arm 28 includes a horizontal adjustment square tube 7, first horizontal openings 8 respectively opened on both sides of the horizontal adjustment square tube 7, and multiple equally spaced adjustment holes 21, and second horizontal openings 13 respectively opened on the other two sides of the horizontal adjustment square tube 7. The multiple adjustment holes 21 are spaced apart from the first horizontal openings 8, and the second horizontal openings 13 correspond to the multiple adjustment holes 21. The contact of the second dial indicator 12 passes through two vertically arranged adjustment holes 21 and abuts against the outer wall of the other half coupling 1. The outer wall of the contact of the second dial indicator 12 is tightly fitted with two sixth connectors 22. Both sixth connectors 22 pass through two second horizontal openings 13 and extend to one side of the horizontal adjustment square tube 7. The other end of the vertical adjustment square tube 9 passes through two first horizontal openings 8 and extends to one side of the horizontal adjustment square tube 7. One end of the horizontal adjustment square tube 7 passes through two first vertical openings 3 and extends to one side of the vertical connecting square tube 2. The third connector 17 passes through two second vertical openings 4 and the horizontal adjustment square tube 7 and extends to one side of the vertical connecting square tube 2. The first transverse openings 8 on both sides of the transverse adjustment square tube 7 cooperate with the vertical adjustment square tube 9, allowing the vertical adjustment square tube 9 to move flexibly in the vertical direction. With the locking mechanism of the third connector 17 passing through the second vertical opening 4, the measuring height of the second dial indicator 12 can be adjusted. The sixth connector 22 passes through the second transverse opening 13 and fixes the second dial indicator 12 with the adjustment hole 21. Different adjustment hole 21 positions can be selected according to the outer diameter of the coupling to achieve flexible adaptation of the radial measuring point. One end of the transverse adjustment square tube 7 is inserted into the vertical connecting square tube 2. Combined with the locking function of the third connector 17, it not only ensures the detachability of the transverse adjustment square tube 7, but also enhances the support rigidity under large-spacing conditions through the insertion structure of the transverse adjustment square tube 7.
[0028] The vertical support arm 29 includes a vertical support square tube 18 and fifth vertical openings 25 respectively located on both sides of the vertical support square tube 18. One end of the vertical support square tube 18 is embedded in one side of the horizontal fixed square tube 14, and the other end of the vertical support square tube 18 passes through the horizontal adjusting square tube 7 and extends to one side of it. A fourth connector 19 passes through the horizontal adjusting square tube 7 and the two fifth vertical openings 25 and extends to one side of the horizontal adjusting square tube 7. The cooperation between the fifth vertical openings 25 on both sides and the fourth connector 19 allows the horizontal adjusting square tube 7 to be finely adjusted in height within the vertical support square tube 18, adapting to the alignment requirements of couplings with different shaft spacings.
[0029] The first connecting component 5, the second connecting component 16, the third connecting component 17, the fourth connecting component 19, the fifth connecting component 20, the sixth connecting component 22, and the seventh connecting component 23 are all composed of bolts and nuts that are threaded into the bolts. The bolts and nuts are used to form the first to seventh connecting components, and the threaded connection allows for quick assembly and disassembly of the components, facilitating flexible assembly and storage of the device in different operating scenarios and improving portability. The threaded connection provides a stable locking force, preventing component displacement during alignment, ensuring the overall structural stability of the device, and guaranteeing measurement accuracy.
[0030] Working process and principle: When this long-distance coupling detachable and adjustable centering and alignment device is working, the vertical connecting square tube 2 is first connected to a half coupling 1 using two first connecting parts 5. During connection, according to the specifications of the half coupling 1, the two first connecting parts 5 are slidably adjusted within the two second vertical openings 4 to adjust the distance between them so as to fit the opening on the half coupling 1. One end of the horizontally fixed square tube 14 is inserted into the rectangular opening 6 of the vertical connecting square tube 2, and air is passed through it. The leveling instrument is used to calibrate the horizontal level of the vertical connecting square tube 2 and the horizontal fixing square tube 14. Next, one end of the vertical supporting square tube 18 is inserted into the horizontal fixing square tube 14, and the other end is inserted into the horizontal adjusting square tube 7, locked with the fourth connector 19. Then, one end of the vertical adjusting square tube 9 is inserted into the fourth horizontal opening 26 of the horizontal fixing square tube 14, and the other end is inserted into the horizontal adjusting square tube 7, fixed with the fifth connector 20. Simultaneously, one end of the horizontal adjusting square tube 7 is inserted into the vertical connecting square tube 2 and locked with the third connector 17. Afterwards, the installation... Install the first dial indicator 11 and the second dial indicator 12, so that the contact of the first dial indicator 11 passes through the fourth vertical opening 24 of the vertical adjusting square tube 9 and abuts against one end of the other half coupling 1, and the contact of the second dial indicator 12 passes through the adjusting hole 21 of the horizontal adjusting square tube 7 and abuts against its outer wall; then move the horizontal adjusting square tube 7 vertically along the length direction of the vertical connecting square tube 2, the vertical supporting square tube 18, and the vertical adjusting square tube 9, and move the vertical adjusting square tube 9 horizontally along the length direction of the horizontal fixed square tube 14 and the horizontal adjusting square tube 7. After adjusting to the appropriate position, lock it with the corresponding bolts and nuts; finally, measure the data using the first dial indicator 11 and the second dial indicator 12 to determine the alignment of the coupling. If there is a deviation, repeat the adjustment steps. After completing the alignment, the device can be disassembled by removing the first connecting piece 5, the second connecting piece 16, the third connecting piece 17, the fourth connecting piece 19, the fifth connecting piece 20, the sixth connecting piece 22, and the seventh connecting piece 23 for easy carrying and future use, thereby achieving the alignment of long-distance couplings.
[0031] In summary, this device solves the problems of complex structure and poor portability of traditional alignment tools under large-pitch conditions. With its detachable and adjustable component design, it enables rapid assembly and precise alignment of couplings of different specifications, and features easy operation and high measurement accuracy.
[0032] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A detachable and adjustable alignment device for long-distance couplings, comprising two spaced-apart half-couplings (1), characterized in that, It also includes a vertically adjustable connecting arm (27), a horizontally fixed arm (30), a horizontally adjusting arm (28), a vertically adjusting arm (31), a vertically supporting arm (29), a first dial indicator (11), a second dial indicator (12), and a locking connection assembly; the vertically adjustable connecting arm (27) is connected to one half-coupling (1), the vertically adjusting arm (31) is located on one side of the other half-coupling (1), and the other half-coupling (1) is located between the horizontally adjusting arm (28) and... Between the horizontal fixed arms (30); one end of the horizontal fixed arm (30) is inserted into the bottom side of the vertical adjustable connecting arm (27); the horizontal adjusting arm (28) is inserted into the vertical adjustable connecting arm (27), the vertical support arm (29) and the vertical adjusting arm (31), and can move vertically along the length direction of the vertical adjustable connecting arm (27), the vertical support arm (29) and the vertical adjusting arm (31); the vertical support arm (29) is located in the vertical adjustable connecting arm (27). Between the connecting arm (27) and the vertical adjusting arm (31); one end of the vertical adjusting arm (31) and the vertical support arm (29) are both inserted into the horizontal fixed arm (30), and the other end of both pass through the horizontal adjusting arm (28) and extend to one side thereon. The vertical adjusting arm (31) can move horizontally along the length direction of the horizontal fixed arm (30) and the horizontal adjusting arm (28); the horizontal adjusting arm (28) and the horizontal fixed arm (30) are connected to the vertical adjustable connecting arm (27). The joints, the connection between the vertical support arm (29) and the horizontal adjusting arm (28), and the connection between the vertical adjusting arm (31) and the horizontal fixed arm (30) are all connected by locking connection components; the first dial indicator (11) is set on the vertical adjusting arm (31) and located between the horizontal adjusting arm (28) and the horizontal fixed arm (30), and the second dial indicator (12) is set on the horizontal adjusting arm (28) and located between the vertical adjusting arm (31) and the other half coupling (1).
2. The centering and alignment device according to claim 1, characterized in that, The locking connection assembly consists of two vertically spaced first connectors (5), second connectors (16), third connectors (17), fourth connectors (19), and fifth connectors (20).
3. The centering and alignment device according to claim 2, characterized in that, The vertically adjustable connecting arm (27) includes a vertical connecting square tube (2), a first vertical opening (3) respectively provided on both sides of the vertical connecting square tube (2), a second vertical opening (4) respectively provided on the other two sides of the vertical connecting square tube (2), and a rectangular opening (6) provided at the bottom of one side of the vertical connecting square tube (2). The two first connecting pieces (5) pass through the two first vertical openings (3) and are connected to a half coupling (1).
4. The centering and alignment device according to claim 3, characterized in that, The horizontal fixing arm (30) includes a horizontal fixing square tube (14), a third horizontal opening (15) respectively provided on both sides of the horizontal fixing square tube (14), and a fourth horizontal opening (26) provided on the inner side of the horizontal fixing square tube (14); one end of the horizontal fixing square tube (14) passes through the rectangular opening (6) and extends into the interior of the vertical connecting square tube (2).
5. The centering and alignment device according to claim 4, characterized in that, The outer walls of both the vertical connecting square tube (2) and the horizontal fixing square tube (14) are equipped with bubble level instruments.
6. The centering and alignment device according to claim 4, characterized in that, The vertical adjustment arm (31) includes a vertical adjustment square tube (9), third vertical openings (10) respectively located on both sides of the vertical adjustment square tube (9), and fourth vertical openings (24) respectively located on the other two sides of the vertical adjustment square tube (9). The contacts of the first dial indicator (11) pass through the two fourth vertical openings (24) and abut against one end of the other half coupling (1). The outer wall of the contacts of the first dial indicator (11) is tightly fitted with two seventh connectors (23). Both seventh connectors (23) pass through the two third vertical openings (10) and extend to one side of the vertical adjustment square tube (9). One end of the vertical adjustment square tube (9) passes through the fourth horizontal opening (26) and extends into the interior of the horizontal fixed square tube (14). One end of the fifth connector (20) passes through the two third horizontal openings (15) and the vertical adjustment square tube (9) and extends to one side of the horizontal fixed square tube (14).
7. The centering and alignment device according to claim 6, characterized in that, The lateral adjustment arm (28) includes a lateral adjustment square tube (7), first lateral openings (8) respectively provided on both sides of the lateral adjustment square tube (7), and a plurality of equally spaced adjustment holes (21), and second lateral openings (13) respectively provided on the other two sides of the lateral adjustment square tube (7). The plurality of adjustment holes (21) are spaced apart from the first lateral openings (8), and the second lateral openings (13) correspond to the plurality of adjustment holes (21). The contact of the second dial indicator (12) passes through two vertically arranged adjustment holes (21) and abuts against the outer wall of the other half coupling (1). The second dial indicator (12) touches... The outer wall of the head is tightly fitted with two sixth connectors (22). Both sixth connectors (22) pass through two second transverse openings (13) and extend to one side of the transverse adjustment square tube (7). The other end of the vertical adjustment square tube (9) passes through two first transverse openings (8) and extends to one side of the transverse adjustment square tube (7). One end of the transverse adjustment square tube (7) passes through two first vertical openings (3) and extends to one side of the vertical connecting square tube (2). The third connector (17) passes through two second vertical openings (4) and the transverse adjustment square tube (7) and extends to one side of the vertical connecting square tube (2).
8. The centering and alignment device according to claim 7, characterized in that, The vertical support arm (29) includes a vertical support square tube (18) and fifth vertical openings (25) respectively provided on both sides of the vertical support square tube (18). One end of the vertical support square tube (18) is embedded in one side of the horizontal fixed square tube (14), and the other end of the vertical support square tube (18) passes through the horizontal adjusting square tube (7) and extends to one side of it. The fourth connector (19) passes through the horizontal adjusting square tube (7) and the two fifth vertical openings (25) and extends to one side of the horizontal adjusting square tube (7).
9. The centering and alignment device according to claim 8, characterized in that, The first connector (5), the second connector (16), the third connector (17), the fourth connector (19), the fifth connector (20), the sixth connector (22), and the seventh connector (23) are all composed of bolts and nuts that are threadedly engaged with the bolts.