Flange alignment device

Abstract

The invention relates to the technical field of flange butt joint tools, and discloses a flange alignment device which is characterized by comprising a first connecting piece, a first limiting assembly, a second connecting piece, a second limiting assembly and a driving assembly. The first limiting assembly is connected to the first connecting piece. The second limiting assembly is connected to the second connecting piece. The first limiting assembly and the limiting assembly are connected through the driving assembly. The first connecting piece is connected to the first flange, the first limiting assembly abuts against the peripheral face of the second flange, the second connecting piece is connected to the second flange, and the second limiting assembly abuts against the peripheral face of the first flange. And then a driving device is used for driving the first limiting assembly and the second limiting assembly to get close to each other, so that the second limiting assembly moves along the peripheral face of the first flange, the first limiting assembly moves along the peripheral face of the second flange, the second flange can be driven to coaxially rotate relative to the first flange, and then alignment of the first flange and the second flange is completed.

Description

Technical Field

[0001] The present application relates to the technical field of docking tools, and particularly relates to a flange alignment device. Background Art

[0002] The compressor test piece of an aero-engine needs to be subjected to repeated and multiple test studies, and generally the test is carried out on a special test bench. The exhaust end of the test piece and the exhaust volute of the test bench are often flange-connected. A flange, also called a flange plate or a collar, is used for connecting two devices. The exhaust end of the test piece and the exhaust volute of the test bench are respectively provided with the same first flange and second flange, and a plurality of through holes are circumferentially arranged on both the first flange and the second flange. A plurality of through holes are circumferentially arranged on the flange. After the through holes of the first flange and the second flange are aligned one by one, bolts are passed through for connection. To ensure the installation accuracy, the problem of aligning the two flanges can be preferably solved by sequentially passing positioning pins through the through holes of the first flange and the second flange.

[0003] During the actual installation process of the compressor and the exhaust volute, the compressor is always in a suspended state. The special lifting tool is a lifting beam, which can realize the movement of the compressor along the X, Y, and Z axes, but the lifting tool does not have the function of rotating the compressor, and there is suspension swing. Due to factors such as the large weight of the test piece and the uncontrollable assembly posture, even if the special lifting tool is used to coaxialize the two flanges, it is very difficult to adjust the through holes on the two flanges to be aligned so that the positioning pins can be inserted. Only the assembly personnel can repeatedly and continuously try to install and adjust, and occasionally complete the installation by adding internal side lifting points and other measures. The installation work is extremely difficult.

[0004] Therefore, how to solve or improve the problem that the through holes on the two flanges are difficult to align to ensure that the positioning pins can be sequentially passed through has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present application provides a flange alignment device to solve or improve the problem that the through holes on the two flanges are difficult to align to ensure that the positioning pins can be sequentially passed through.

[0006] In a first aspect, the present application provides a flange alignment device, including:

[0007] A first connecting member for connecting with the first flange;

[0008] A first limiting component connected to the first connecting member;

[0009] A second connecting member for connecting with the second flange;

[0010] A second limiting component connected to the second connecting member;

[0011] A driving component, the first limiting component and the second limiting component are connected by the driving component, and the driving component is adapted to drive the first limiting component and the second limiting component to approach each other.

[0012] Wherein, when the first connecting piece is connected to the first flange, the first limiting component is used to abut against the circumferential surface of the second flange; when the second connecting piece is connected to the second flange, the second limiting component is used to abut against the circumferential surface of the first flange.

[0013] Optionally, the first limiting component includes a first mounting plate connected to the first connecting piece, the second limiting component includes a second mounting plate connected to the second connecting piece, the first mounting plate and the second mounting plate are connected by the driving component, and the driving component is adapted to drive the first mounting plate and the second mounting plate to approach each other.

[0014] Optionally, the first limiting component further includes a first limiting plate detachably connected to the first connecting piece. When the first connecting piece is connected to the first flange, the first limiting plate is located outside the circumferential surface of the second flange and is used to abut against the circumferential surface of the second flange.

[0015] The second limiting component further includes a second limiting plate detachably connected to the second connecting piece. When the second connecting piece is connected to the second flange, the second limiting plate is located outside the circumferential surface of the first flange and is used to abut against the circumferential surface of the first flange.

[0016] Optionally, the first limiting plate is provided with a first arc surface for abutting against the circumferential surface of the second flange.

[0017] The second limiting plate is provided with a second arc surface for abutting against the circumferential surface of the first flange.

[0018] Optionally, it further includes:

[0019] A first adjusting element, the first limiting plate is connected to the first connecting piece through the first adjusting element. When the first connecting piece is connected to the first flange, the first adjusting element is used to adjust the first connecting piece to move closer to the second flange.

[0020] A second adjusting element, the second limiting plate is connected to the second connecting piece through the second adjusting element. When the second connecting piece is connected to the second flange, the second adjusting element is used to adjust the second connecting piece to move closer to the first flange.

[0021] Optionally, the first adjusting element includes a first adjusting screw. A first through hole is provided on the first limiting plate, and a first threaded hole is provided on the first connecting member. The first adjusting screw is disposed through the first through hole and screwed into the first threaded hole.

[0022] And / or, the second adjusting element includes a second adjusting screw. A second through hole is provided on the second limiting plate, and a second threaded hole is provided on the second connecting member. The second adjusting screw is disposed through the second through hole and screwed into the second threaded hole.

[0023] Optionally, the driving assembly includes:

[0024] A bolt, and a first mounting hole and a second mounting hole are respectively provided through the first limiting assembly and the second limiting assembly. The bolt is disposed through the first mounting hole and the second mounting hole.

[0025] A first nut is sleeved on the bolt, and the first nut and the nut of the bolt are respectively located on opposite sides of the first mounting hole and the second mounting hole.

[0026] Optionally, the driving assembly further includes:

[0027] A second nut is sleeved on the bolt and located between the first mounting hole and the second mounting hole;

[0028] A third nut is sleeved on the bolt and located between the first mounting hole and the second mounting hole.

[0029] Optionally, it further includes:

[0030] A fourth nut is sleeved on the bolt, and the first nut and the fourth nut are respectively located on opposite sides of the first mounting hole and the second mounting hole.

[0031] Optionally, at least two first positioning holes for a positioning pin to pass through are provided on the first connecting member, and two of the first positioning holes can be coaxially aligned with a through hole on the first flange respectively;

[0032] And / or, at least two second positioning holes for a positioning pin to pass through are provided on the second connecting member, and two of the second positioning holes can be coaxially aligned with a through hole on the second flange respectively.

[0033] A flange alignment device provided by the present application includes a first connecting member, a first limiting assembly, a second connecting member, a second limiting assembly, and a driving assembly. The first limiting assembly is connected to the first connecting member. The second limiting assembly is connected to the second connecting member. The driving assembly is adapted to drive the first limiting assembly and the second limiting assembly to approach each other.

[0034] After coaxial alignment and end - face fitting of the first flange and the second flange, connect the first connecting member to the first flange and make the first limiting component abut against the outer peripheral surface of the second flange, connect the second connecting member to the second flange and make the second limiting component abut against the outer peripheral surface of the first flange. Then use the driving device to drive the first limiting component and the second limiting component to approach each other, so that the second limiting component moves along the outer peripheral surface of the first flange and the first limiting component moves along the outer peripheral surface of the second flange. Thus, the coaxial rotation of the second flange relative to the first flange is ensured by limiting at two places, avoiding the uncontrollable attitude when the second flange rotates coaxially relative to the first flange. Until each perforation on the second flange is coaxially aligned with each perforation on the first flange one by one, the alignment of the first flange and the second flange can be completed, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the following - described drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 The first - perspective structural schematic diagram of a flange alignment device according to an embodiment of the present application;

[0037] Figure 2 The second - perspective structural schematic diagram of a flange alignment device according to an embodiment of the present application;

[0038] Figure 3 The structural schematic diagram of the first connecting member of a flange alignment device according to an embodiment of the present application;

[0039] Figure 4 The structural schematic diagram of the second connecting member of a flange alignment device according to an embodiment of the present application

[0040] Figure 5 The structural schematic diagram of the first limiting plate of a flange alignment device according to an embodiment of the present application;

[0041] Figure 6 The structural schematic diagram of the second limiting plate of a flange alignment device according to an embodiment of the present application;

[0042] Figure 7 The schematic diagram of installing a flange alignment device on the first flange and the second flange according to an embodiment of the present application.

[0043] DESCRIPTION OF THE REFERENCE NUMERALS:

[0044] 1. First connecting member; 11. First threaded hole; 12. First positioning hole; 2. First limiting component; 21. First mounting plate; 211. First mounting hole; 22. First limiting plate; 221. First through hole; 3. Second connecting member; 31. Second threaded hole; 32. Second positioning hole; 4. Second limiting component; 41. Second mounting plate; 411. Second mounting hole; 42. Second limiting plate; 421. Second through hole; 5. Driving component; 51. Bolt; 52. First nut; 53. Second nut; 54. Third nut; 55. Fourth nut; 6. First adjusting screw; 7. Second adjusting screw; 8. First flange; 9. Second flange. Detailed implementation manner

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] The following will be combined with Figures 1 to 7 to describe the embodiments of the present application.

[0047] According to an embodiment of the present application, on the one hand, a flange alignment device is provided. As shown in Figure 1 and Figure 2 , it includes: a first connecting member 1, a first limiting component 2, a second connecting member 3, a second limiting component 4, and a driving component 5.

[0048] The first limiting component 2 is connected to the first connecting member 1, the second limiting component 4 is connected to the second connecting member 3, and the first limiting component 2 and the second limiting component 4 are connected by the driving component 5, so that the driving component 5 can drive the first limiting component 2 and the second limiting component 4 to approach each other, so that the first connecting member 1 and the second connecting member 3 approach each other.

[0049] The first flange 8 is connected to the compressor, and the second flange 9 is connected and fixed to the exhaust volute. When connecting the first flange 8 on the compressor and the second flange 9 on the exhaust volute, hoist the compressor so that the first flange 8 and the second flange 9 are coaxial and the end faces are in contact.

[0050] Then connect the first connecting member 1 to the first flange 8, abut the first limiting component 2 against the outer peripheral surface of the second flange 9, connect the second connecting member 3 to the second flange 9, and abut the second limiting component 4 against the outer peripheral surface of the first flange 8. The first connecting member 1 and the second connecting member 3 are arranged in sequence along the circumferential direction of the first flange 8 or the second flange 9.

[0051] The driving device is used to drive the first limit assembly 2 and the second limit assembly 4 to approach each other, so that the second limit assembly 4 moves along the outer circumference of the first flange 8, and the first limit assembly 2 moves along the outer circumference of the second flange 9, thereby driving the second flange 9 to rotate coaxially relative to the first flange 8. The first limit assembly 2 and the second limit assembly 4 limit at two locations to ensure that the second flange 9 rotates coaxially relative to the first flange 8, so as to avoid the second flange 9 coaxially rotating relative to the first flange 8. When the through holes on the second flange 9 are coaxially aligned with the through holes on the first flange 8, the alignment of the first flange 8 and the second flange 9 can be completed, and the operation is convenient.

[0052] Thereafter, at least two positioning pins are respectively passed through the through holes of the first flange 8 and the second flange 9 to ensure that the second flange 9 is aligned with the first flange 8. Then, the bolts 51 are installed one by one to complete the connection between the first flange 8 and the second flange 9.

[0053] To increase stability, Figure 7 As shown, for a flange group consisting of a first flange 8 and a second flange 9 that are coaxial and end-face-contacted, at least two flange alignment devices may be provided in the circumferential direction of the flange group.

[0054] A flange alignment device is provided on the left and right sides of the flange group. In this way, the two flange alignment devices respectively limit the first flange 8 and the second flange 9 on the left and right sides of the flange group. The second flange 9 is further limited to rotate coaxially relative to the first flange 8, and the limiting effect is better.

[0055] Compared with providing a single flange alignment device, it is effective to prevent the second flange 9 from deviating to the side away from the flange alignment device.

[0056] Alternatively, a flange alignment device is provided on each of the four sides of the flange assembly, namely, the upper side, the lower side, the left side, and the right side. In this way, the four flange alignment devices respectively limit the first flange 8 and the second flange 9 on the upper side, the lower side, the left side, and the right side of the flange assembly. The second flange 9 is further limited to rotate coaxially relative to the first flange 8, and the limiting effect is better.

[0057] As an optional embodiment, Figures 1 to 4 As shown, the first limiting assembly 2 includes a first mounting plate 21, which is connected to the first connecting member 1. The second limiting assembly 4 includes a second mounting plate 41, which is connected to the second connecting member 3. The first mounting plate 21 and the second mounting plate 41 are connected through a driving assembly 5.

[0058] The driving assembly 5 can be used to drive the first mounting plate 21 and the second mounting plate 41 to approach each other, so that the first connecting member 1 and the second connecting member 3 are brought closer to each other.

[0059] In some embodiments, when connecting the first connecting member 1 to the first flange 8, the side wall of the first mounting plate 21 just abuts against the circumferential surface of the second flange 9. When connecting the second connecting member 3 to the second flange 9, the side wall of the second mounting plate 41 just abuts against the circumferential surface of the first flange 8. When using the driving device to drive the first mounting plate 21 and the second mounting plate 41 to approach each other, the side wall of the second mounting plate 41 moves along the outer circumferential surface of the first flange 8, and the side wall of the first mounting plate 21 moves along the outer circumferential surface of the second flange 9. Thus, two-position limiting ensures that the second flange 9 rotates coaxially relative to the first flange 8.

[0060] In a further embodiment, as Figures 1 to 6 shown, the first limiting assembly 2 further includes a first limiting plate 22. The first limiting plate 22 is detachably connected to the first connecting member 1. The second limiting assembly 4 further includes a second limiting plate 42. The second limiting plate 42 is detachably connected to the second connecting member 3.

[0061] After connecting the first connecting member 1 to the first flange 8, connect the first limiting plate 22 to the first connecting member 1 so that the first limiting plate 22 abuts against the circumferential surface of the second flange 9. After connecting the second connecting member 3 to the second flange 9, connect the second limiting plate 42 to the second connecting member 3 so that the second limiting plate 42 abuts against the circumferential surface of the first flange 8. In this way, when using the driving device to drive the first mounting plate 21 and the second mounting plate 41 to approach each other, the side wall of the second limiting plate 42 moves along the outer circumferential surface of the first flange 8, and the side wall of the first limiting plate 22 moves along the outer circumferential surface of the second flange 9. Thus, two-position limiting ensures that the second flange 9 rotates coaxially relative to the first flange 8.

[0062] Since the first flange 8 and the second flange 9 are the same, the first limiting plate 22 can be arranged along the axial direction of the first flange 8 or the second flange 9, so as to abut against both the circumferential surface of the second flange 9 and the circumferential surface of the first flange 8. The second limiting plate 42 can be arranged along the axial direction of the first flange 8 or the second flange 9, so as to abut against both the circumferential surface of the first flange 8 and the circumferential surface of the second flange 9.

[0063] In a still further embodiment, as Figure 1 and Figure 2 shown, the flange alignment device further includes a first adjusting element and a second adjusting element.

[0064] The first limiting plate 22 is connected to the first connecting member 1 through a first adjusting element. After connecting the first connecting member 1 to the first flange 8, the first limiting plate 22 is connected to the first connecting member 1 through the first adjusting element, so that the first limiting plate 22 is located outside the circumferential surface of the second flange 9. Then, the first adjusting element is used to adjust the distance between the first limiting plate 22 and the circumferential surface of the second flange 9, so that the first limiting plate 22 moves closer to the second flange 9 until the first limiting plate 22 abuts against the circumferential surface of the second flange 9.

[0065] With this setting, it can be applicable to second flanges 9 with different sizes, and the applicability is better.

[0066] The second limiting plate 42 is connected to the second connecting member 3 through a second adjusting element. After connecting the second connecting member 3 to the second flange 9, the second limiting plate 42 is connected to the second connecting member 3 through the second adjusting element, so that the second limiting plate 42 is located outside the circumferential surface of the first flange 8. Then, the second adjusting element is used to adjust the distance between the second limiting plate 42 and the circumferential surface of the first flange 8, so that the second limiting plate 42 moves closer to the first flange 8 until the second limiting plate 42 abuts against the circumferential surface of the first flange 8.

[0067] With this setting, it can be applicable to first flanges 8 with different sizes, and the applicability is better.

[0068] Specifically, in some embodiments, such as Figure 1 、 Figure 3 and Figure 5 shown, the first adjusting element includes a first adjusting screw 6. A first through hole 221 is provided on the first limiting plate 22, and a first threaded hole 11 is provided on the first connecting member 1. When the first connecting member 1 is connected to the first flange 8, the opening direction of the first threaded hole 11 is consistent with the radial direction of the first flange 8.

[0069] The first adjusting screw 6 is passed through the first through hole 221 and then screwed into the first threaded hole 11. Thus, the first limiting plate 22 is detachably connected to the first connecting member 1. At this time, the first limiting plate 22 is located outside the circumferential surface of the second flange 9, and then the first adjusting screw 6 is tightened to push the first limiting plate 22 to move closer to the circumferential surface of the second flange 9 until the first limiting plate 22 abuts against the circumferential surface of the second flange 9.

[0070] In some embodiments, such as Figure 1 、 Figure 4 and Figure 6 shown. The second adjusting element includes a second adjusting screw 7. A second through hole 421 is provided on the second limiting plate 42, and a second threaded hole 31 is provided on the second connecting member 3. When the second connecting member 3 is connected to the second flange 9, the opening direction of the second threaded hole 31 is consistent with the radial direction of the second flange 9.

[0071] Pass the second adjusting screw 7 through the second through hole 421 and then screw it into the second threaded hole 31. Thus, the second limiting plate 42 is detachably connected to the second connecting member 3. At this time, the second limiting plate 42 is located outside the circumferential surface of the first flange 8, and then tighten the second adjusting screw 7 to push the second limiting plate 42 to move closer to the circumferential surface of the first flange 8 until the first limiting plate 22 abuts against the circumferential surface of the first flange 8.

[0072] In some other embodiments, the second adjusting element includes a second adjusting screw 7, and at the same time the second adjusting element includes a second adjusting screw 7.

[0073] At least two first adjusting screws 6 are provided, and each first adjusting screw 6 correspondingly passes through a first through hole 221 and is screwed into a first threaded hole 11. In this way, at least two first adjusting screws 6 play a fixing role at the same time to prevent the first limiting plate 22 from rotating around the first adjusting screw 6.

[0074] At least two second adjusting screws 7 are provided, and each second adjusting screw 7 correspondingly passes through a second through hole 421 and is screwed into a second threaded hole 31. In this way, at least two second adjusting screws 7 play a fixing role at the same time to prevent the second limiting plate 42 from rotating around the second adjusting screw 7.

[0075] As an alternative embodiment, as Figure 1 and Figure 2 shown, the driving assembly 5 includes a bolt 51 and a first nut 52.

[0076] As Figure 3 and Figure 4 shown, first mounting holes 211 and second mounting holes 411 are respectively formed through the first limiting assembly 2 and the second limiting assembly 4. After passing the bolt 51 through the first mounting hole 211 and the second mounting hole 411 in sequence, sleuth the first nut 52 on the bolt 51 so that the first nut 52 and the nut of the bolt 51 are respectively located on the opposite sides of the first mounting hole 211 and the second mounting hole 411.

[0077] With such a setting, tighten the first nut 52 to make the first nut 52 move closer to the nut of the bolt 51, thereby pushing the first limiting assembly 2 and the second limiting assembly 4 closer to each other.

[0078] It should be noted that the diameters of the first mounting hole 211 and the second mounting hole 411 should be larger than the diameter of the bolt 51.

[0079] The first mounting hole 211 and the second mounting hole 411 can also be waist-shaped holes.

[0080] The first mounting hole 211 can be formed on the first mounting plate 21 of the first limiting component 2, and the second mounting hole 411 can be formed on the second mounting plate 41 of the second limiting component 4.

[0081] In an alternative embodiment, as Figure 1 and Figure 2 shown, the driving component 5 further includes a second nut 53 and a third nut 54. The bolt 51 first passes through the second mounting hole 411 and then through the first mounting hole 211. Both the second nut 53 and the third nut 54 are sleeved on the bolt 51.

[0082] Both the second nut 53 and the third nut 54 are located between the first mounting hole 211 and the second mounting hole 411. The second nut 53 is located between the third nut 54 and the first mounting hole 211, and the third nut 54 is located between the second nut 53 and the second mounting hole 411.

[0083] With such an arrangement, loosening the second nut 53 and tightening the first nut 52 can make the first limiting component 2 and the second limiting component 4 approach each other.

[0084] Loosening the first nut 52, loosening the second nut 53, and tightening the third nut 54 can make the first limiting component 2 and the second limiting component 4 move away from each other, and the adjustment is more flexible and convenient.

[0085] It is worth mentioning that when the first limiting component 2 and the second limiting component 4 move away from each other, the first connecting member 1 and the second connecting member 3 also move away from each other, or the second flange 9 can rotate coaxially relative to the first flange 8, thereby aligning the second flange 9 and the first flange 8.

[0086] In an alternative embodiment, as Figure 1 and Figure 2 shown, the driving component 5 further includes a fourth nut 55. The fourth nut 55 is sleeved on the bolt 51, and the first nut 52 and the fourth nut 55 are respectively located on opposite sides of the first mounting hole 211 and the second mounting hole 411.

[0087] With such an arrangement, the first nut 52 can be tightened to make the first limiting component 2 and the second limiting component 4 approach each other, or the fourth nut 55 can be loosened to make the first limiting component 2 and the second limiting component 4 approach each other, and the adjustment is more flexible and convenient.

[0088] As an alternative implementation manner, as Figure 3 and Figure 4 shown, at least two first positioning holes 12 are provided on the first connecting member 1. The positions of the first positioning holes 12 are set according to the positions of the through holes on the first flange 8, so that the first positioning holes 12 can be coaxially aligned with the through holes on the first flange 8 one by one.

[0089] After aligning each first positioning hole 12 on the first connecting member 1 with each perforation on the first flange 8 coaxially one by one, a pin is used to pass through each first positioning hole 12 and then inserted into the corresponding aligned perforation, thereby connecting the first connecting member 1 and the first flange 8. Since at least two first positioning holes 12 are provided, under the positioning action of the corresponding number of positioning pins, the first connecting member 1 cannot move radially along the first flange 8 relative to the first flange 8. Thus, when the first flange 8 rotates, it drives the first connecting member 1 to move together.

[0090] At least two second positioning holes 32 are provided on the second connecting member 3. The positions of the second positioning holes 32 are set according to the positions of the perforations on the second flange 9, so that each of the second positioning holes 32 can be coaxially aligned with each of the perforations on the second flange 9 one by one.

[0091] After aligning each second positioning hole 32 on the second connecting member 3 with each perforation on the second flange 9 coaxially one by one, a pin is used to pass through each second positioning hole 32 and then inserted into the corresponding aligned perforation, thereby connecting the second connecting member 3 and the second flange 9. Since at least two second positioning holes 32 are provided, under the positioning action of the corresponding number of positioning pins, the second connecting member 3 cannot move radially along the first flange 8 relative to the second flange 9. Thus, when the second flange 9 rotates, it drives the second connecting member 3 to move together.

[0092] Both the first connecting member 1 and the second connecting member 3 can be plate-shaped. After fitting the plate surface of the first connecting member 1 to the end surface of the first flange 8, each first positioning hole 12 is coaxially aligned with each perforation on the flange one by one. After fitting the plate surface of the second connecting member 3 to the end surface of the second flange 9, each second positioning hole 32 is coaxially aligned with each perforation on the second flange 9, and the connection is more reliable and stable.

[0093] Although the embodiments of the present application are described with reference to the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the present application.

Claims

1. A flange alignment device, characterized in that: include: A first connecting member (1), used for connecting to a first flange (8); A first limiting component (2) connected to the first connecting member (1); A second connecting member (3), used for connecting to a second flange (9); A second limiting component (4) connected to the second connecting member (3); a driving assembly (5), wherein the first limiting assembly (2) and the limiting assembly are connected via the driving assembly (5), and the driving assembly (5) is adapted to drive the first limiting assembly (2) and the second limiting assembly (4) to move closer to each other. Wherein, when the first connecting member (1) is connected to the first flange (8), the first limiting assembly (2) is used to abut against the circumferential surface of the second flange (9); when the second connecting member (3) is connected to the second flange (9), the second limiting assembly (4) is used to abut against the circumferential surface of the first flange (8).

2. The flange alignment device according to claim 1, characterized in that: The first limiting assembly (2) comprises a first mounting plate (21) connected to the first connecting member (1), the second limiting assembly (4) comprises a second mounting plate (41) connected to the second connecting member (3), the first mounting plate (21) and the second mounting plate (41) are connected via the driving assembly (5), and the driving assembly (5) is suitable for driving the first mounting plate (21) and the second mounting plate (41) to approach each other.

3. The flange alignment device according to claim 2, characterized in that: The first limiting assembly (2) further comprises a first limiting plate (22) detachably connected to the first connecting member (1); when the first connecting member (1) is connected to the first flange (8), the first limiting plate (22) is located outside the circumference of the second flange (9) and is used to abut against the circumference of the second flange (9); The second limiting assembly (4) also includes a second limiting plate (42) detachably connected to the second connecting member (3); when the second connecting member (3) is connected to the second flange (9), the first limiting plate (22) is located outside the circumference of the first flange (8) and is used to abut against the circumference of the first flange (8).

4. The flange alignment device according to claim 3, characterized in that: The first limiting plate (22) is provided with a first arc surface, and the first arc surface is used to abut against the circumferential surface of the second flange (9); The second limiting plate (42) is provided with a second arc surface, and the second arc surface is used to abut against the circumferential surface of the first flange (8).

5. The flange alignment device according to claim 3, characterized in that: Also includes: a first adjusting element, wherein the first limiting plate (22) is connected to the first connecting member (1) via the first adjusting element, and when the first connecting member (1) is connected to the first flange (8), the first adjusting element is used to adjust the first connecting member (1) to move closer to the second flange (9); A second adjusting element, wherein the second limiting plate (42) is connected to the second connecting member (3) via the second adjusting element, and when the second connecting member (3) is connected to the second flange (9), the second adjusting element is used to adjust the second connecting member (3) to move closer to the first flange (8).

6. The flange alignment device according to claim 5, characterized in that: The first adjusting element comprises a first adjusting screw (6), a first through hole (221) is formed on the first limiting plate (22), a first threaded hole (11) is formed on the first connecting member (1), and the first adjusting screw (6) passes through the first through hole (221) and is screwed into the first threaded hole (11); And / or, the second adjusting element comprises a second adjusting screw (7), a second through hole (421) is provided on the second limiting plate (42), a second threaded hole (31) is provided on the second connecting member (3), and the second adjusting screw (7) is arranged through the second through hole (421) and screwed into the second threaded hole (31).

7. The flange alignment device according to claim 1, characterized in that: The driving assembly (5) comprises: A bolt (51), wherein the first limiting assembly (2) and the second limiting assembly (4) are respectively provided with a first mounting hole (211) and a second mounting hole (411), and the bolt (51) is provided through the first mounting hole (211) and the second mounting hole (411); The first nut (52) is sleeved on the bolt (51), and the first nut (52) and the nut of the bolt (51) are respectively located on the sides of the first mounting hole (211) and the second mounting hole (411) that are away from each other.

8. The flange alignment device according to claim 7, characterized in that: The driving assembly (5) further comprises: a second nut (53), sleeved on the bolt (51) and located between the first mounting hole (211) and the second mounting hole (411); A third nut (54) is sleeved on the bolt (51) and is located between the first mounting hole (211) and the second mounting hole (411).

9. The flange alignment device according to claim 7, characterized in that: Also includes: The fourth nut (55) is sleeved on the bolt (51), and the first nut (52) and the fourth nut (55) are respectively located on the sides of the first mounting hole (211) and the second mounting hole (411) that are away from each other.

10. The flange alignment device according to claim 1, characterized in that: The first connecting member (1) is provided with at least two first positioning holes (12) for the positioning pins to pass through, wherein the two first positioning holes (12) can be coaxially aligned with a through hole on the first flange (8) respectively; And / or, the second connecting member (3) is provided with at least two second positioning holes (32) for the positioning pins to pass through, wherein the two second positioning holes (32) can be coaxially aligned with a through hole on the second flange (9) respectively.

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