Flange alignment device

Abstract

The application relates to the technical field of flange butt joint tools, and discloses a flange aligning 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 second limiting assembly are connected through the driving assembly. The first connecting piece is connected to a first flange, and the first limiting assembly is abutted against the outer circumferential surface of a second flange. The second connecting piece is connected to the second flange, and the second limiting assembly is abutted against the outer circumferential surface of the first flange. Then, the first limiting assembly and the second limiting assembly are driven to move close to each other by using the driving device, so that the second limiting assembly moves along the outer circumferential surface of the first flange, and the first limiting assembly moves along the outer circumferential surface of the second flange, that is, the second flange can be driven to rotate coaxially relative to the first flange, and the 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 tool, in particular to a flange alignment device. BACKGROUND

[0002] The test piece of an aero-engine compressor needs to be repeatedly and multiple times tested and researched, and is generally tested on a special test bed. The exhaust end of the test piece is connected with the exhaust volute of the test bed by flanges. The flange, also called flange flange plate or flange, is used for the connection between two devices. The exhaust end of the test piece and the exhaust volute of the test bed are respectively provided with the same first flange and second flange, and the first flange and the second flange are both provided with a plurality of through holes in the circumferential direction. The through holes on the flanges are aligned one by one and connected by bolts. In order to ensure the installation accuracy, the alignment of the two flanges can be better solved by sequentially inserting the positioning pins through the through holes of the first flange and the second flange.

[0003] During the actual installation of the compressor and the exhaust volute, the compressor is always in a suspended state, and the special lifting appliance is a lifting beam, which can realize the movement of the compressor along the X, Y and Z axes. However, the lifting appliance does not have the function of rotating the compressor, and the suspension is shaking. Due to the factors such as large weight of the test piece, uncontrollable assembly posture, etc., even if the special lifting appliance is used to make the two flanges coaxial, it is also difficult to adjust the through holes on the two flanges to be aligned to allow the positioning pins to be inserted, and only the assembly personnel can repeatedly try to assemble and adjust, and occasionally complete the installation by increasing internal lateral 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 pass through one by one has become an important technical problem to be solved by the technical personnel in the field. SUMMARY

[0005] Therefore, 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 pass through one by one.

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

[0007] A first connecting piece is used for connecting with the first flange;

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

[0009] A second connecting piece is used for connecting with the second flange;

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

[0011] a driving assembly, the first limiting assembly and the second limiting assembly are connected through the driving assembly, and the driving assembly is suitable for driving the first limiting assembly and the second limiting assembly to move close to each other,

[0012] When the first connecting piece is connected with the first flange, the first limiting assembly is used to abut against the peripheral surface of the second flange; and when the second connecting piece is connected with the second flange, the second limiting assembly is used to abut against the peripheral surface of the first flange.

[0013] Optionally, the first limiting assembly comprises a first mounting plate connected with the first connecting piece, and the second limiting assembly comprises a second mounting plate connected with the second connecting piece, and the first mounting plate and the second mounting plate are connected through the driving assembly, and the driving assembly is suitable for driving the first mounting plate and the second mounting plate to move close to each other.

[0014] Optionally, the first limiting assembly further comprises a first limiting plate detachably connected with the first connecting piece, and when the first connecting piece is connected with the first flange, the first limiting plate is located outside the peripheral surface of the second flange and is used to abut against the peripheral surface of the second flange.

[0015] The second limiting assembly further comprises a second limiting plate detachably connected with the second connecting piece, and when the second connecting piece is connected with the second flange, the first limiting plate is located outside the peripheral surface of the first flange and is used to abut against the peripheral surface of the first flange.

[0016] Optionally, the first limiting plate is provided with a first arc surface used to abut against the peripheral surface of the second flange.

[0017] The second limiting plate is provided with a second arc surface used to abut against the peripheral surface of the first flange.

[0018] Optionally, the device further comprises:

[0019] a first adjusting element, the first limiting plate is connected with the first connecting piece through the first adjusting element, and when the first connecting piece is connected with the first flange, the first adjusting element is used to adjust the first connecting piece to move close to the second flange.

[0020] a second adjusting element, the second limiting plate is connected with the second connecting piece through the second adjusting element, and when the second connecting piece is connected with the second flange, the second adjusting element is used to adjust the second connecting piece to move close to the first flange.

[0021] Optionally, the first adjusting element comprises a first adjusting screw, the first limiting plate is provided with a first through hole, the first connecting piece is provided with a first threaded hole, and the first adjusting screw is arranged through the first through hole and screwed in the first threaded hole.

[0022] And / or, the second adjusting element comprises a second adjusting screw, the second limiting plate is provided with a second through hole, the second connecting piece is provided with a second threaded hole, and the second adjusting screw is arranged through the second through hole and screwed in the second threaded hole.

[0023] Optionally, the driving assembly comprises:

[0024] A bolt is arranged through the first mounting hole and the second mounting hole, respectively.

[0025] A first nut is sleeved on the bolt, and the first nut and the screw cap of the bolt are located on the side away from each other of the first mounting hole and the second mounting hole, respectively.

[0026] Optionally, the driving assembly further comprises:

[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 comprises:

[0030] A fourth nut is sleeved on the bolt, and the first nut and the fourth nut are located on the side away from each other of the first mounting hole and the second mounting hole, respectively.

[0031] Optionally, the first connecting piece is provided with at least two first positioning holes for the positioning pin to pass through, and the two first positioning holes can be coaxially aligned with one through hole on the first flange, respectively.

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

[0033] The flange alignment device provided by the application comprises 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 driving assembly is adapted to drive the first limiting assembly and the second limiting assembly to approach each other.

[0034] After the first flange and the second flange are coaxial and end face abutment, the first connecting piece is connected to the first flange, and the first limiting assembly is abutted with the outer circumferential surface of the second flange, the second connecting piece is connected to the second flange, and the second limiting assembly is abutted with the outer circumferential surface of the first flange. Then use the driving device to drive the first limiting assembly and the second limiting assembly to move close to each other, so that the second limiting assembly moves along the outer circumferential surface of the first flange, and the first limiting assembly moves along the outer circumferential surface of the second flange. Thus, the second flange is guaranteed to rotate coaxially relative to the first flange at two locations, avoiding the posture of the second flange being uncontrollable when the second flange rotates coaxially relative to the first flange. Until the perforations on the second flange are coaxially aligned with the perforations on the first flange one by one, the alignment of the first flange and the second flange can be completed, which is convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present application, the following will briefly introduce the drawings needed to be used in the specific embodiments or related technology description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any inventive labor.

[0036] Figure 1 A first perspective view of a flange alignment device according to an embodiment of the present application;

[0037] Figure 2 A second perspective view of a flange alignment device according to an embodiment of the present application;

[0038] Figure 3 A first connecting piece structure diagram of a flange alignment device according to an embodiment of the present application;

[0039] Figure 4 A second connecting piece structure diagram of a flange alignment device according to an embodiment of the present application

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

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

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

[0043] BRIEF DESCRIPTION OF DRAWINGS

[0044] 1. first connecting piece; 11. first threaded hole; 12. first positioning hole; 2. first limiting assembly; 21. first mounting plate; 211. first mounting hole; 22. first limiting plate; 221. first through hole; 3. second connecting piece; 31. second threaded hole; 32. second positioning hole; 4. second limiting assembly; 41. second mounting plate; 411. second mounting hole; 42. second limiting plate; 421. second through hole; 5. driving assembly; 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 DESCRIPTION

[0045] To make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, any other embodiments obtained by those skilled in the art without creative efforts should fall into the scope of the present application.

[0046] The embodiments of the present application are described below in connection with Figures 1 to 7 .

[0047] According to the embodiments of the present application, in one aspect, a flange aligning device is provided, as shown in Figure 1 and Figure 2 , comprising: a first connecting piece 1, a first limiting assembly 2, a second connecting piece 3, a second limiting assembly 4, and a driving assembly 5.

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

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

[0050] Then the first connecting piece 1 is connected to the first flange 8, the first limiting assembly 2 is abutted against the outer circumferential surface of the second flange 9, the second connecting piece 3 is connected to the second flange 9, and the second limiting assembly 4 is abutted against the outer circumferential surface of the first flange 8. The first connecting piece 1 and the second connecting piece 3 are sequentially arranged along the circumference of the first flange 8 or the second flange 9.

[0051] A driving device is used to drive the first limiting component 2 and the second limiting component 4 closer together, causing the second limiting component 4 to move along the outer circumferential surface of the first flange 8 and the first limiting component 2 to move along the outer circumferential surface of the second flange 9, thereby driving the second flange 9 to rotate coaxially relative to the first flange 8. The first limiting component 2 and the second limiting component 4 ensure that the second flange 9 rotates coaxially with the first flange 8, preventing uncontrollable posture due to excessive weight during coaxial rotation. Alignment of the first flange 8 and the second flange 9 is completed when all the through holes on the second flange 9 are coaxially aligned with all the through holes on the first flange 8, making the operation convenient.

[0052] Afterwards, passing at least two locating pins through the holes in the first flange 8 and the second flange 9 respectively will ensure that the second flange 9 is aligned with the first flange 8. Then, 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, such as Figure 7 As shown, for a flange group consisting of a first flange 8 and a second flange 9 that are coaxial and have their end faces touching, at least two flange alignment devices can be provided circumferentially in this flange group. For example:

[0054] A flange alignment device is installed on each of the left and right sides of the flange assembly. This arrangement allows the two flange alignment devices to limit the movement of the first flange 8 and the second flange 9 on the left and right sides of the flange assembly, respectively. This further restricts the coaxial rotation of the second flange 9 relative to the first flange 8, resulting in a better limiting effect.

[0055] Compared to setting a single flange alignment device, this effectively prevents the second flange 9 from shifting to the side away from the flange alignment device.

[0056] Alternatively, a flange alignment device can be installed on each of the four sides of the flange assembly: top, bottom, left, and right. This arrangement allows the four flange alignment devices to limit the movement of the first flange 8 and the second flange 9 on each of the four sides of the flange assembly. This further restricts the coaxial rotation of the second flange 9 relative to the first flange 8, resulting in a better limiting effect.

[0057] As an optional embodiment, such as Figures 1 to 4 As shown, the first limiting component 2 includes a first mounting plate 21, which is connected to the first connector 1. The second limiting component 4 includes a second mounting plate 41, which is connected to the second connector 3. The first mounting plate 21 and the second mounting plate 41 are connected by a drive component 5.

[0058] The drive assembly 5 can be used to drive the first mounting plate 21 and the second mounting plate 41 to move closer to each other, so that the first connector 1 and the second connector 3 move closer to each other.

[0059] In some embodiments, when the first connecting member 1 is connected to the first flange 8, the side wall of the first mounting plate 21 abuts against the peripheral surface of the second flange 9. When the second connecting member 3 is connected to the second flange 9, the side wall of the second mounting plate 41 abuts against the peripheral surface of the first flange 8. When the first mounting plate 21 and the second mounting plate 41 are driven to move towards each other by the driving device, the side wall of the second mounting plate 41 moves along the peripheral surface of the first flange 8, and the side wall of the first mounting plate 21 moves along the peripheral surface of the second flange 9. Thus, the rotation of the second flange 9 relative to the first flange 8 is guaranteed by the abutment of the second flange 9 against the first flange 8 at two locations.

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

[0061] After the first connecting member 1 is connected to the first flange 8, the first limiting plate 22 is connected to the first connecting member 1, such that the first limiting plate 22 abuts against the peripheral surface of the second flange 9. After the second connecting member 3 is connected to the second flange 9, the second limiting plate 42 is connected to the second connecting member 3, such that the second limiting plate 42 abuts against the peripheral surface of the first flange 8. Thus, when the first mounting plate 21 and the second mounting plate 41 are driven to move towards each other by the driving device, the side wall of the second limiting plate 42 moves along the peripheral surface of the first flange 8, and the side wall of the first limiting plate 22 moves along the peripheral surface of the second flange 9. Thus, the rotation of the second flange 9 relative to the first flange 8 is guaranteed by the abutment of the second flange 9 against the first flange 8 at two locations.

[0062] Since the first flange 8 and the second flange 9 are identical, the first limiting plate 22 can be arranged along the axial direction of the first flange 8 or the second flange 9, such that the first limiting plate 22 abuts against the peripheral surface of the second flange 9 and the peripheral 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, such that the second limiting plate 42 abuts against the peripheral surface of the first flange 8 and the peripheral surface of the second flange 9.

[0063] In still further embodiments, as shown in Figure 1 and Figure 2 the flange aligning device further comprises a first adjusting element and a second adjusting element.

[0064] The first limiting plate 22 is connected with the first connecting piece 1 through a first adjusting element. After the first connecting piece 1 is connected with the first flange 8, the first limiting plate 22 is connected on the first connecting piece 1 through the first adjusting element, so that the first limiting plate 22 is located outside the peripheral surface of the second flange 9. Then the distance between the first limiting plate 22 and the peripheral surface of the second flange 9 is adjusted by using the first adjusting element, so that the first limiting plate 22 moves close to the second flange 9 until the first limiting plate 22 abuts against the peripheral surface of the second flange 9.

[0065] In this way, the second flange 9 with different sizes can be applied, and the applicability is better.

[0066] The second limiting plate 42 is connected with the second connecting piece 3 through a second adjusting element. After the second connecting piece 3 is connected with the second flange 9, the second limiting plate 42 is connected on the second connecting piece 3 through the second adjusting element, so that the second limiting plate 42 is located outside the peripheral surface of the first flange 8. Then the distance between the second limiting plate 42 and the peripheral surface of the first flange 8 is adjusted by using the second adjusting element, so that the second limiting plate 42 moves close to the first flange 8 until the second limiting plate 42 abuts against the peripheral surface of the first flange 8.

[0067] In this way, the first flange 8 with different sizes can be applied, and the applicability is better.

[0068] Specifically, in some embodiments, as shown in Figure 1 , Figure 3 and Figure 5 , the first adjusting element includes a first adjusting screw 6, a first through hole 221 is formed on the first limiting plate 22, and a first threaded hole 11 is formed on the first connecting piece 1. When the first connecting piece 1 is connected on the first flange 8, the first threaded hole 11 is formed in the radial direction of the first flange 8.

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

[0070] In some embodiments, as shown in Figure 1 , Figure 4 and Figure 6 , the second adjusting element includes a second adjusting screw 7, a second through hole 421 is formed on the second limiting plate 42, and a second threaded hole 31 is formed on the second connecting piece 3. When the second connecting piece 3 is connected on the second flange 9, the second threaded hole 31 is formed in the radial direction of the second flange 9.

[0071] The second adjusting screw 7 is screwed into the second threaded hole 31 through the second through hole 421. Thus, the second limiting plate 42 is detachably connected to the second connecting piece 3. At this time, the second limiting plate 42 is located outside the peripheral surface of the first flange 8. Then, the second adjusting screw 7 is tightened to push the second limiting plate 42 to move close to the peripheral surface of the first flange 8 until the first limiting plate 22 abuts against the peripheral surface of the first flange 8.

[0072] In some other embodiments, the second adjusting element includes the second adjusting screw 7.

[0073] In some embodiments, the first adjusting element includes the first adjusting screw 6. In some embodiments, the first adjusting element includes at least two first adjusting screws 6. Each first adjusting screw 6 is screwed into a first threaded hole 11 through a first through hole 221.

[0074] In some embodiments, the second adjusting element includes the second adjusting screw 7. In some embodiments, the second adjusting element includes at least two second adjusting screws 7. Each second adjusting screw 7 is screwed into a second threaded hole 31 through a second through hole 421.

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

[0076] As shown in Figure 3 and Figure 4 The first mounting hole 211 and the second mounting hole 411 are respectively arranged through the first limiting assembly 2 and the second limiting assembly 4. The bolt 51 is sequentially arranged through the first mounting hole 211 and the second mounting hole 411. The first nut 52 is sleeved on the bolt 51. The screw cap of the bolt 51 and the first nut 52 are located on the sides of the first mounting hole 211 and the second mounting hole 411, respectively.

[0077] In this way, the first nut 52 is tightened to move close to the screw cap of the bolt 51, thereby pushing the first limiting assembly 2 and the second limiting assembly 4 to move close to each other.

[0078] It should be noted that the diameters of the first mounting hole 211 and the second mounting hole 411 are greater 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 arranged on the first mounting plate 21 in the first limiting assembly 2, and the second mounting hole 411 can be arranged on the second mounting plate 41 in the second limiting assembly 4.

[0081] In optional embodiments, as shown in Figure 1 and Figure 2 , the driving assembly 5 further comprises a second nut 53 and a third nut 54. The bolt 51 passes through the second mounting hole 411 and then the first mounting hole 211. The second nut 53 and the third nut 54 are both sleeved on the bolt 51.

[0082] The second nut 53 and the third nut 54 are both 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] In this way, loosening the second nut 53 and tightening the first nut 52 can make the first limiting assembly 2 and the second limiting assembly 4 approach each other.

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

[0085] It is worth mentioning that when the first limiting assembly 2 and the second limiting assembly 4 move away from each other, the first connecting piece 1 and the second connecting piece 3 also move away from each other, and the second flange 9 can also rotate coaxially relative to the first flange 8, so that the second flange 9 and the first flange 8 are aligned.

[0086] In optional embodiments, as shown in Figure 1 and Figure 2 , the driving assembly 5 further comprises a fourth nut 55, which is sleeved on the bolt 51, and the first nut 52 and the fourth nut 55 are located on the side away from each other of the first mounting hole 211 and the second mounting hole 411, respectively.

[0087] In this way, the first nut 52 can be tightened to make the first limiting assembly 2 and the second limiting assembly 4 approach each other, or the fourth nut 55 can be loosened to make the first limiting assembly 2 and the second limiting assembly 4 approach each other, and the adjustment is more flexible and convenient.

[0088] As an optional implementation, as shown in Figure 3 and Figure 4 , the first connecting piece 1 is provided with at least two first positioning holes 12. The positions of the first positioning holes 12 are arranged according to the positions of the through holes on the first flange 8, so that each first positioning hole 12 can be coaxially aligned with each through hole on the first flange 8.

[0089] After each first positioning hole 12 on the first connecting piece 1 is coaxially aligned with each through hole on the first flange 8, a pin is inserted through each first positioning hole 12 and into the corresponding aligned through hole, thereby connecting the first connecting piece 1 with the first flange 8. Since there are at least two first positioning holes 12, the first connecting piece 1 cannot move radially relative to the first flange 8 under the positioning action of the corresponding number of positioning pins, so that the first flange 8 moves together with the first connecting piece 1 when it rotates.

[0090] The second connecting piece 3 is provided with at least two second positioning holes 32. The positions of the second positioning holes 32 are set according to the positions of the through holes on the second flange 9, so that each second positioning hole 32 can be coaxially aligned with each through hole on the second flange 9.

[0091] After each second positioning hole 32 on the second connecting piece 3 is coaxially aligned with each through hole on the second flange 9, a pin is inserted through each second positioning hole 32 and into the corresponding aligned through hole, thereby connecting the second connecting piece 3 with the second flange 9. Since there are at least two second positioning holes 32, the second connecting piece 3 cannot move radially relative to the first flange 8 under the positioning action of the corresponding number of positioning pins, so that the second flange 9 moves together with the second connecting piece 3 when it rotates.

[0092] The first connecting piece 1 and the second connecting piece 3 can both be plate-shaped. After the plate surface of the first connecting piece 1 is attached to the end surface of the first flange 8, each first positioning hole 12 is coaxially aligned with each through hole on the flange. After the plate surface of the second connecting piece 3 is attached to the end surface of the second flange 9, each second positioning hole 32 is coaxially aligned with each through hole on the second flange 9, thereby making the connection more reliable and stable.

[0093] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A flange alignment device, characterized by, The utility model relates to a flange connecting device, including: First connecting piece (1) is used for connecting with first flange (8); First limiting component (2) is connected on first connecting piece (1); Second connecting piece (3) is used for connecting with second flange (9); Second limiting component (4) is connected on second connecting piece (3); Driving assembly (5), first limiting component (2) and second limiting component (4) are connected through driving assembly (5), and driving assembly (5) is suitable for driving first limiting component (2) and second limiting component (4) to be close to each other, Wherein, when first connecting piece (1) is connected with first flange (8), first limiting component (2) is used for abutting with the circumferential surface of second flange (9), and when second connecting piece (3) is connected with second flange (9), second limiting component (4) is used for abutting with the circumferential surface of first flange (8).

2. The flange alignment device of claim 1, wherein, First limiting component (2) includes first mounting plate (21) connected with first connecting piece (1), second limiting component (4) includes second mounting plate (41) connected with second connecting piece (3), and first mounting plate (21) and second mounting plate (41) are connected through driving assembly (5), and driving assembly (5) is suitable for driving first mounting plate (21) and second mounting plate (41) to be close to each other.

3. The flange alignment device of claim 2, wherein, First limiting component (2) further includes first limiting plate (22) detachably connected with first connecting piece (1), and when first connecting piece (1) is connected with first flange (8), first limiting plate (22) is located on the outside of the circumferential surface of second flange (9) and is used for abutting with the circumferential surface of second flange (9); Second limiting component (4) further includes second limiting plate (42) detachably connected with second connecting piece (3), and when second connecting piece (3) is connected with second flange (9), first limiting plate (22) is located on the outside of the circumferential surface of first flange (8) and is used for abutting with the circumferential surface of first flange (8).

4. The flange alignment device of claim 3, wherein, First limiting plate (22) is provided with first arc surface, and the first arc surface is used for abutting with the circumferential surface of second flange (9); Second limiting plate (42) is provided with second arc surface, and the second arc surface is used for abutting with the circumferential surface of first flange (8).

5. The flange alignment device of claim 3, wherein, Further including: First adjusting element, first limiting plate (22) is connected with first connecting piece (1) through first adjusting element, and when first connecting piece (1) is connected with first flange (8), first adjusting element is used for adjusting first connecting piece (1) to move close to second flange (9); Second adjusting element, second limiting plate (42) is connected with second connecting piece (3) through second adjusting element, and when second connecting piece (3) is connected with second flange (9), second adjusting element is used for adjusting second connecting piece (3) to move close to first flange (8).

6. The flange alignment device of claim 5, wherein, The first adjusting element comprises a first adjusting screw (6), a first through hole (221) is formed in the first limiting plate (22), a first threaded hole (11) is formed in the first connecting piece (1), the first adjusting screw (6) is arranged through the first through hole (221) and is screwed in the first threaded hole (11); And / or, the second adjusting element comprises a second adjusting screw (7), a second through hole (421) is formed in the second limiting plate (42), a second threaded hole (31) is formed in the second connecting piece (3), the second adjusting screw (7) is arranged through the second through hole (421) and is screwed in the second threaded hole (31).

7. The flange alignment apparatus of claim 1, wherein, The driving assembly (5) comprises: A bolt (51), a first mounting hole (211) and a second mounting hole (411) are respectively arranged through the first limiting assembly (2) and the second limiting assembly (4), the bolt (51) is arranged through the first mounting hole (211) and the second mounting hole (411); A first nut (52) is sleeved on the bolt (51), and the first nut (52) and the nut of the bolt (51) are located on the side away from each other of the first mounting hole (211) and the second mounting hole (411).

8. The flange alignment device of claim 7, wherein, The driving assembly (5) further comprises: A second nut (53) is 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 located between the first mounting hole (211) and the second mounting hole (411).

9. The flange alignment device of claim 7, wherein, Further comprising: A fourth nut (55) is sleeved on the bolt (51), and the first nut (52) and the fourth nut (55) are located on the side away from each other of the first mounting hole (211) and the second mounting hole (411).

10. The flange alignment apparatus of claim 1, wherein, At least two first positioning holes (12) for positioning pins are arranged on the first connecting piece (1), and two first positioning holes (12) can be coaxially aligned with a through hole on the first flange (8) respectively; And / or, at least two second positioning holes (32) for positioning pins are arranged on the second connecting piece (3), and two second positioning holes (32) can be coaxially aligned with a through hole on the second flange (9) respectively.

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