Corrugated pipe angle deviation testing equipment

Abstract

The invention relates to the technical field of corrugated pipe testing equipment, and particularly discloses corrugated pipe angle deviation testing equipment which comprises a machine body, a supporting seat and a driving device. Two sets of swing assemblies are arranged on the supporting seat, each swing assembly comprises a swing frame rotationally connected with the supporting seat and a first flange seat fixed to the swing frame in an adjustable mode, and the two swing frames are in transmission connection through a synchronizing mechanism and are jointly driven by a driving device; two position-adjustable second flange seats are mounted on the machine body and are distributed on two sides of the two first flange seats, and central shafts of the two second flange seats and the two first flange seats are coplanar. According to the corrugated pipe angle deviation testing equipment, the actual working condition of the corrugated pipe can be simulated, and the accuracy of test data is improved; based on adjustable design, the applicability is wide; the two corrugated pipes are tested at the same time, the efficiency is high, the fluctuation of the load borne by the driving device can be reduced, the elastic potential energy of the corrugated pipes can be recycled, the operation stability is high, the energy consumption is low, and the testing cost is remarkably saved.

Description

Technical Field

[0001] The invention relates to the technical field of bellows testing equipment, and in particular to a bellows angle deviation testing equipment. Background Art

[0002] As the core component of high-precision flexible connection, welded bellows plays an irreplaceable key role in vacuum sealing systems, dynamic compensation devices, semiconductor manufacturing equipment, aerospace vehicles, precision instruments and other fields. Its fatigue life parameters directly determine the operating reliability and safety margin of the equipment, so its performance must be verified through standardized testing. The axial linear telescopic loading test method currently commonly used in the industry does not take into account the angular offset characteristics of the bellows when it moves with the swinging parts in multiple degrees of freedom under actual working conditions, resulting in significant differences between the experimental load spectrum and the actual stress state, making it difficult to accurately characterize the mechanical response characteristics and failure mechanism under angular offset conditions.

[0003] The patent with publication number CN117606763A provides a bellows swing test device, which can improve the test data by simulating the stress state under the swing condition. However, the structure of the equipment is relatively complex, the offset angle and bending radius are poorly adjustable, and the working condition reproduction ability is lacking. During the test, the load of the power system fluctuated violently and the operating stability was insufficient. In addition, since no energy feedback mechanism has been established, the elastic potential energy of the bellows cannot be recycled, resulting in low system energy efficiency and high operating energy consumption, which significantly increases the test cost. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a bellows angle deviation test device. It can accurately reproduce the stress state in the actual working process, lay the foundation for fatigue life assessment, and improve the reliability of test data. Based on the adjustable design, it can meet the test requirements of bellows with different lengths and working conditions, and has good applicability. At the same time, the device has the technical advantages of low operating energy consumption and high test efficiency.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: A bellows angle deviation test device comprises a machine body, on which a support seat and a driving device are fixed; the support seat is provided with two sets of symmetrical swing components, the swing components comprising a swing frame and a first flange seat, the lower end of the swing frame is rotatably connected to the support seat; the first flange seat is fixed to the swing frame in a position-adjustable manner; the two swing frames are connected through a synchronous mechanism and driven by the driving device, and can swing synchronously and in the same direction within a preset angle range; two second flange seats with adjustable positions are installed on the machine body, the two second flange seats are distributed on both sides of the two first flange seats, and the central axes of the four are coplanar; when two bellows are tested simultaneously, the first flange seat and the second flange seat on the same side are respectively fixedly connected to the two ends of a bellows, when the two swing frames are located in the middle of the stroke, the two first flange seats and the two second flange seats are symmetrically distributed and the central axes of the two first flange seats coincide, so that the shapes of the two bellows are in a symmetrical state, when the swing frame swings to one side to the end point of the stroke, the central axes of the first flange seat on this side coincide with the central axes of the second flange seat, and the corresponding bellows are in a contracted state.

[0006] In a preferred embodiment, the synchronization mechanism includes two synchronization gears and a driving gear, the two synchronization gears are coaxially fixedly connected to the two swing frames respectively, the driving gear is meshed with the two synchronization gears, and the driving gear is transmission-connected to the driving device.

[0007] In a preferred embodiment, the synchronization mechanism includes a first connecting rod, both ends of which are rotatably connected to the upper ends of the two swing frames respectively, and the two swing frames, the support seat and the first connecting rod together constitute a parallel four-bar mechanism.

[0008] In a preferred embodiment, first guide members parallel to each other are fixed to the two swing frames respectively, the two first flange seats are respectively slidably matched with the two first guide members, and the two first flange seats are respectively rotatably connected to the two ends of a second connecting rod; the second connecting rod and the support seat are respectively rotatably connected to a telescopic mechanism, and the telescopic mechanism, the second connecting rod and the support seat and any swing frame constitute a parallel four-bar mechanism, and the telescopic mechanism can be telescoped along the extension direction of the first guide member; Furthermore, each swing frame includes two swing arms that are spaced apart from each other, the first guide member is a guide groove provided on the side walls opposite to the two swing arms, and two slide blocks are fixed on the first flange seat, and the two slide blocks are respectively slidably matched with the two guide grooves; Furthermore, the telescopic mechanism is an automatic telescopic device.

[0009] In a preferred embodiment, the support seat is supported by a lifting device installed in the machine body, and the machine body is rotatably connected to two oblique arms symmetrically distributed on both sides of the support seat, and the two oblique arms are respectively fixed with second guide members extending linearly, and the two second flange seats are respectively slidably matched with the two second guide members, and the second flange seats are provided with locking bolts for locking their positions; an angle adjustment mechanism for adjusting the inclination angle of the two oblique arms is installed on the machine body; Furthermore, the lifting device is provided with at least two lifting columns extending vertically upward, and the support seat is fixedly supported by the lifting columns.

[0010] Furthermore, the lower end of the oblique arm extends into the body, and the angle adjustment mechanism includes a driving mechanism and two pull rods, and the lower ends of the two oblique arms are respectively connected to the driving mechanism via a pull rod.

[0011] In a preferred embodiment, the first flange seat and the second flange seat can be sealed and connected to the flange joint at the end of the bellows; at least one of the first flange seat and the second flange seat is connected to a vacuum hose that connects the inner cavity of the bellows with the vacuum generating system; Furthermore, the vacuum generating system is installed inside the machine body; and the vacuum hose is connected between the second flange seat and the vacuum generating system.

[0012] Compared with the prior art, the bellows angle deviation test device in the present invention has the following beneficial technical effects: 1. The offset angle and bending radius can be adjusted and preset, which can simulate the actual working conditions of the bellows and improve the objectivity and accuracy of the test data; based on the adjustability of the offset angle and bending radius, and the fact that the first flange seat and the second flange seat can be adjusted according to the length of the bellows, this equipment has a wide range of applicability.

[0013] 2. Two bellows of the same specifications can be tested simultaneously, which significantly improves efficiency.

[0014] 3. Since the two swing frames adopt a linkage design, during the test, when the offset angle of one bellows gradually increases to the set value, the other bellows undergoes reverse deformation, that is, gradually returns to the contracted state, and this alternation, on the one hand, reduces the volatility of the load on the drive device, improves the operating stability and energy efficiency ratio; on the other hand, during the contraction process of the bellows, the reverse load generated by the rebound force is used to drive the other bellows to deflect the angle, thereby reducing the load on the drive device, significantly reducing the operating energy consumption, and saving the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0016] Figure 1 It is a schematic structural diagram of a corrugated pipe angle offset test device.

[0017] Figure 2 It is a schematic structural diagram of the corrugated pipe angle offset test device in another direction.

[0018] Figure 3 It is a schematic structural diagram of the support base and two swing frames.

[0019] Figure 4 It is a schematic diagram of the distribution relationship of the support base, two swing frames, the first connecting rod and the second connecting rod.

[0020] Figure 5 It is a schematic diagram of the matching structure of the corrugated pipe angle offset test device and two corrugated pipes.

[0021] Figure 6 It is a schematic diagram of the state of the corrugated pipe angle offset test device when the swing frame swings to the middle position of the stroke.

[0022] Figure 7 It is a schematic diagram of the state of the corrugated pipe angle offset test device when the swing frame swings to one end of the stroke.

[0023] Figure 8 It is a schematic diagram of the state of the corrugated pipe angle offset test device when the swing frame swings to the other end of the stroke.

[0024] Figure 9 It is a schematic diagram of the principle of adjustable working parameters of the corrugated pipe angle offset test device.

[0025] Figure 10 It is a schematic structural diagram inside the machine body.

[0026] Figure 11 It is a schematic structural diagram of the corrugated pipe angle offset test device when the air extraction hose is set.

[0027] In the figure: 1. Machine body, 2. Second flange seat, 3. Support base, 4. Driving device, 5. First flange seat, 6. Swing frame, 61. Swing arm, 7. First connecting rod, 8. First rotating shaft, 9. Synchronous gear, 10. Driving gear, 11. Slide block, 12. First guiding member, 13. Second connecting rod, 14. Telescopic mechanism, 15. Second rotating shaft, 16. Flange joint, 17. Inclined arm, 18. Second guiding member, 19. Lifting column, 20. Pull rod, 21. Locking bolt, 22. Third rotating shaft, 23. Lifting device, 24. Driving mechanism, 25. Air extraction hose. Detailed implementation mode

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] Refer to Figures 1 - 5 As shown, the embodiment discloses a specific design scheme of a bellows angle offset test device, which includes a machine body 1, on which a support seat 3 and a driving device 4 are fixed; two sets of symmetrically structured swing components are provided on the support seat 3; each swing component includes a swing frame 6 and a first flange seat 5. The lower end of the swing frame 6 is rotationally connected to the support seat 3 through a first rotating shaft 8. The first flange seat 5 is used for fixedly connecting with a flange joint 16 at one end of the bellows. The position of the first flange seat 5 is higher than that of the first rotating shaft 8, and the first flange seat 5 is fixedly connected to the swing frame 6 in an adjustable position manner, so that the distance between the first flange seat 5 and the first rotating shaft 8 is adjustable; the two swing frames 6 in the two swing components are connected through a synchronization mechanism, and the two swing frames 6 are jointly driven by the driving device 4 and can swing reciprocally synchronously and in the same direction within a preset angle range; two second flange seats 2 with adjustable positions are installed on the machine body 1, and the second flange seats 2 are used for fixedly connecting with the flange joints 16 at the other end of the bellows. The two second flange seats 2 are distributed on both sides of the overall two first flange seats 5 and the central axes of the four are coplanar; Refer to Figures 5 - 8 As shown, when testing two bellows simultaneously, the two first flange seats 5 are respectively fixedly connected to the flange joints 16 at one end of the two bellows, and the flange joints 16 at the other end of the two bellows are respectively fixedly connected to the corresponding second flange seats 2, thereby installing and fixing two bellows with the same specifications on this test device; during the test, the driving device 4 drives the two swing components to swing reciprocally within a preset angle. When the two swing frames 6 swing to the middle position of the stroke, the four of the two first flange seats 5 and the two second flange seats 2 are symmetrically distributed and the central axes of the two first flange seats 5 coincide. At this time, the shapes of the two bellows are in a symmetric state. When the swing frame 6 swings to one side to the end point of the stroke, the central axes of the first flange seat 5 and the second flange seat 2 on this side coincide, and the corresponding bellows is in a contracted state. Based on the structural characteristics of the present invention, by routinely debugging the positional relationship among the swing frame 6, the first flange seat 5 and the second flange seat 2, the above test process can be realized, and there are no technical obstacles during the implementation process.

[0030] Refer to Figures 6 - 9As shown, the usage method and working principle of this bellows angle offset testing device are as follows: First, set the offset angle and bending radius.

[0031] Based on the structural characteristics of this bellows angle offset testing device, it can be determined that during the testing process, the two swing frames 6 have the same swing angle α, and this angle is the offset angle at both ends of the bellows during the testing process. Therefore, by using the driving device 4 to regulate the swing angle α of the swing frame 6, the offset angle can be preset; the distance L1 between the first flange seat 5 and the first rotating shaft 8 has a corresponding relationship with the bending radius of the bellows during the testing process. Therefore, by adjusting the position of the first flange seat 5 on the swing frame 6 to change the size of the distance L1 between the first flange seat 5 and the first rotating shaft 8, the bending radius can be preset.

[0032] Then, install the bellows to be tested.

[0033] Swing the swing frame 6 to one side until it reaches the stroke end point, adjust the position of the second flange seat 2 on this side to make the central axes of the second flange seat 2 and the first flange seat 5 coincide, and adjust the distance L2 between the second flange seat 2 and the first flange seat 5 according to the length of the bellows in the contracted state. Fix the two flange joints 16 of a bellows to the first flange seat 5 and the second flange seat 2 respectively, thus completing the installation and fixation of one bellows; swing the swing frame 6 to the other side until it reaches the stroke end point, and complete the installation and fixation of the second bellows in the same way; in the actual operation process, the above installation steps can be flexibly adjusted according to the actual situation.

[0034] Finally, conduct the test.

[0035] Use the driving device 4 to drive the two swing frames 6 to reciprocate within the preset angle, and be respectively pulled by the two first flange seats 5. The two bellows will cyclically perform angle offset and shrinkage reset, and complete the subsequent test work according to the test requirements.

[0036] The technical advantages of the bellows angle offset testing device in the present invention are as follows: Since the offset angle and bending radius can be adjusted and preset, the actual working conditions of the bellows when it plays the role of angle offset can be simulated, improving the objectivity and accuracy of the test data. Based on the adjustability of the offset angle and bending radius, and in addition, the first flange seat 5 and the second flange seat 2 can be adaptively adjusted according to the length of the bellows, making this bellows angle offset testing device applicable to the testing work of bellows with different lengths and application scenarios, and having good applicability.

[0037] The bellows angle offset testing device can test two bellows with the same specifications simultaneously, significantly improving the efficiency.

[0038] More importantly, as Figure 7 , Figure 8 shown, due to the linkage design of the two swing frames 6, during the test, as the deflection angle of one corrugated pipe gradually increases to the set value, the other corrugated pipe undergoes reverse deformation, that is, the deflection angle gradually decreases and finally returns to the contracted state, and this alternates. The actual effect brought is very significant. On the one hand, the overall load fluctuation on the driving device 4 is small, the operation is stable, and the energy efficiency ratio is high. On the other hand, during the process of the corrugated pipe returning to the contracted state, the reverse load generated by the resilience of the corrugated pipe can be used to drive the other corrugated pipe to deflect, thereby recovering the elastic potential energy of the corrugated pipe, reducing the load on the driving device 4, significantly reducing the operation energy consumption, saving the test cost, especially in the large - batch and multiple - time test work, the above - mentioned technical effects are particularly prominent.

[0039] The synchronization mechanism is arranged between the two swing frames 6 and is the key component to realize the synchronous and co - directional reciprocating swing of the two swing frames 6. Refer to Figures 2 - 4 shown, the present invention provides three implementation manners for the synchronization mechanism: First, the synchronization mechanism includes two synchronization gears 9 and a driving gear 10. The two synchronization gears 9 are respectively fixedly connected coaxially with the two swing frames 6, that is, the synchronization gears 9 and the swing frames 6 can jointly rotate around the first rotating shaft 8. The driving gear 10 meshes with the two synchronization gears 9, and the driving gear 10 is in transmission connection with the driving device 4; thus, when the driving gear 10 rotates, the two synchronization gears 9 rotate synchronously to drive the two swing frames 6 to swing synchronously and co - directionally; the driving device 4 is preferably a motor device.

[0040] Second, the synchronization mechanism includes a first connecting rod 7. The two ends of the first connecting rod 7 are respectively rotatably connected to the upper ends of the two swing frames 6. The two swing frames 6, the support seat 3 and the first connecting rod 7 together form a parallelogram four - bar mechanism; based on the transmission characteristics of the parallelogram four - bar mechanism, when the two swing frames 6 swing, they must remain synchronous and co - directional; Third, the above two structures are combined and implemented, that is, synchronization gears 9 are respectively installed and fixed at the lower ends of the two swing frames 6, the two synchronization gears 9 mesh with the driving gear 10, and at the same time, the upper ends of the swing frames 6 are connected by the first connecting rod 7, thereby making the cooperation structure of the two swing frames 6 more stable and improving the strength.

[0041] The first flange seat 5 is fixed on the swing frame 6 in a position - adjustable manner to ensure that the distance between the first flange seat 5 and the first rotating shaft 8 is adjustable, so as to meet the test requirements of different bending radii; Specifically, linear guides such as rails and guide grooves can be installed on the swing frame 6. The first flange seat 5 is slidably engaged with the linear guide, so that the position of the first flange seat 5 is adjustable. A locking member is provided on the first flange seat 5 to lock the position of the first flange seat 5. Preferably, as Figure 3 , Figure 4 shown, first guides 12 extending linearly are respectively fixed on the two swing frames 6. The two first guides 12 are parallel, being rails or guide grooves. Since the two swing frames 6 swing in the same direction and synchronously, the two first guides 12 can always remain parallel. The two first flange seats 5 are respectively slidably engaged with the two first guides 12. The two first flange seats 5 are respectively rotatably connected to both ends of a second connecting rod 13 via a second rotating shaft 15. The axes of the two first rotating shafts 8 and the two second rotating shafts 15 are parallel and the four are distributed at the vertices of a parallelogram. Thus, the two swing frames 6, the second connecting rod 13 and the support base 3 form a parallelogram linkage. The second connecting rod 13 and the support base 3 are respectively rotatably connected to a telescopic mechanism 14. The telescopic mechanism 14, the second connecting rod 13 and the support base 3 form a parallelogram linkage with any one of the swing frames 6, and the telescopic mechanism 14 can telescopically extend along the extending direction of the first guide 12. Thus, the telescopic movement of the telescopic mechanism 14 can drive the first flange seat 5 to slide on the first guide 12 to adjust the distance between the first flange seat 5 and the first rotating shaft 8, that is, the bending radius. Based on the above structural design of the multi-linkage, it can be ensured that the distances between the two first flange seats 5 and the corresponding first rotating shafts 8 are equal, and at the same time, it is also ensured that the installation method of the telescopic mechanism 14 will not interfere with the swinging of the swing frame 6. Further, each swing frame 6 includes two swing arms 61 spaced along the length direction of the first rotating shaft 8. The first guide 12 is a guide groove formed on the opposite side walls of the two swing arms 61. Two sliders 11 are fixed on the first flange seat 5. The two sliders 11 are respectively slidably engaged with the two guide grooves. Thus, the cooperation structure between the swing frame 6 and the first flange seat 5 is more stable. Further, the telescopic mechanism 14 is an automatic telescopic device such as an electric push rod or a cylinder. Combining with the existing mature automation control technology, the automatic and precise adjustment of the bending radius can be realized.

[0042] The second flange seat 2 is installed on the machine body 1 to provide support for one end of the corrugated pipe. To ensure that the corrugated pipe angle offset test equipment can be applicable to corrugated pipes of different lengths, the second flange seat 2 is installed on the machine body 1 in a position-adjustable manner. In specific implementation, a support arm for supporting the second flange seat 2 can be provided on the machine body 1. The second flange seat 2 can be fixedly bolted to different positions on the support arm, thereby realizing the adjustability of the position of the second flange seat 2. A more preferred method is: Refer to Figure 9 ,Figure 10 As shown, the support seat 3 is supported by a lifting device 23 installed on the machine body 1, and the machine body 1 is rotatably connected to two oblique arms 17 via two third rotating shafts 22. The two oblique arms 17 are symmetrically distributed on both sides of the support seat 3, and the third rotating shaft 22 is parallel to the axis of the second rotating shaft 15. The two oblique arms 17 are respectively fixed with second guide members 18 extending in a straight line and perpendicular to the extension direction of the third rotating shaft 22. The second guide members 18 are guide rails or guide grooves. The two second flange seats 2 are respectively slidably matched with the two second guide members 18, and the second flange seats 2 are provided with locking bolts 21 for locking their positions; an angle adjustment mechanism capable of driving the two oblique arms 17 to rotate to adjust the tilt angle is installed on the machine body 1; Therefore, after the offset angle and the bending radius are preset, the inclination angle of the inclined arm 17 can be adjusted by the angle adjustment mechanism to adjust the direction of the second flange seat 2, so as to ensure that when the swing frame 6 swings to one side to the end point of the stroke, the central axes of the second flange seat 2 and the first flange seat 5 on this side are coplanar and parallel, and then the upper and lower positions of the support seat 3 are adjusted by the lifting device 23, and the position of the second flange seat 2 on the second guide member 18 is adjusted, so as to ensure that the central axes of the second flange seat 2 and the first flange seat 5 coincide with each other and the spacing just meets the installation requirements of the corrugated pipe in the contracted state; making the adjustment operation of the relative position of the first flange seat 5 and the second flange seat 2 more convenient and accurate; Furthermore, the lifting device 23 is an electric or hydraulic lifting device, and the lifting device 23 is provided with at least two lifting columns 19 extending vertically upward, and the support seat 3 is fixedly supported by the lifting columns 19 .

[0043] Furthermore, the lower end of the inclined arm 17 extends into the body 1, and the angle adjustment mechanism includes a driving mechanism 24 and two pull rods 20. The lower ends of the two inclined arms 17 are respectively connected to the driving mechanism 24 via a pull rod 20. Thus, the driving mechanism 24 can drive the inclined arms 17 to rotate via the pull rod 20 to adjust the inclination angles of the two inclined arms 17 at the same time.

[0044] In the application conditions where the bellows angle is offset, the bellows is often required to maintain an internal vacuum state. In this case, the force applied to the bellows during operation is relatively complex. Testing under normal pressure cannot reproduce the actual force state of the bellows, resulting in the test results being seriously deviated from the actual situation. In order to meet the test needs in this scenario, the present invention also has the following technical improvements: See also Figure 11As shown, the first flange seat 5 and the second flange seat 2 can be hermetically connected to the flange joint at the end of the bellows; among the first flange seat 5 and the second flange seat 2, at least one is connected with an air extraction hose 25 that communicates the inner cavity of the bellows with the vacuum generating system; when testing the bellows, the air in the bellows can be evacuated by using the air extraction hose 25 to keep the inside of the bellows in a vacuum state to meet the testing requirements of the bellows involving vacuum working conditions. Since the air extraction hose 25 has the characteristic of being bendable and deformable, it will not pose a substantial obstacle to the movement of the first flange seat 5 and the second flange seat 2.

[0045] Furthermore, the vacuum generating system is installed inside the machine body 1; there are two air extraction hoses 25, which are respectively connected between the two second flange seats 2 and the vacuum generating system. During the testing process, the position of the second flange seat 2 remains unchanged. Therefore, it is possible to avoid the shaking or movement of the air extraction hose 25 from affecting the vacuum degree inside the bellows.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

[0047] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

Claims

1. A bellows angle deviation testing device, comprising a body, a support base and a driving device are fixed on the body; the support base is provided with two sets of structurally symmetrical swing assemblies, the swing assemblies comprising a swing frame and a first flange seat, the lower end of the swing frame is rotatably connected to the support base; the first flange seat is fixed to the swing frame in a position-adjustable manner; the two swing frames are connected through a synchronous mechanism and are driven by the driving device together, and can swing back and forth synchronously and in the same direction within a preset angle range; two second flange seats with adjustable positions are installed on the body, the two second flange seats are distributed on both sides of the two first flange seats and the central axes of the four are coplanar; when two bellows are tested at the same time, when the two swing frames are in the middle position of the stroke, the two first flange seats and the two second flange seats are symmetrically distributed and the central axes of the two first flange seats coincide, and when the swing frame swings to one side to the end point of the stroke, the first flange seat on that side coincides with the central axis of the second flange seat.

2. The bellows angle deviation test device according to claim 1, characterized in that: The synchronization mechanism includes two synchronization gears and a driving gear. The two synchronization gears are respectively coaxially fixedly connected with the two swing frames. The driving gear is meshed with the two synchronization gears, and the driving gear is transmission-connected with the driving device.

3. The bellows angle deviation test device according to claim 1 or 2, characterized in that: The synchronization mechanism comprises a first connecting rod, both ends of which are rotatably connected to the upper ends of the two swing frames respectively, and the two swing frames, the support seat and the first connecting rod together form a parallel four-bar mechanism.

4. The bellows angle deviation test device according to claim 1, characterized in that: The two swing frames are respectively fixed with first guide members parallel to each other, and the two first flange seats are respectively slidably matched with the two first guide members, and the two first flange seats are respectively rotatably connected to the two ends of a second connecting rod; the second connecting rod and the support seat are respectively rotatably connected to a telescopic mechanism, and the telescopic mechanism, the second connecting rod and the support seat and any swing frame constitute a parallel four-bar mechanism, and the telescopic mechanism can be telescoped along the extension direction of the first guide member.

5. The bellows angle deviation test device according to claim 4, characterized in that: Each swing frame includes two swing arms distributed at intervals, the first guide member is a guide groove provided on the opposite side walls of the two swing arms, and two slide blocks are fixed on the first flange seat, and the two slide blocks are respectively slidably matched with the two guide grooves.

6. The bellows angle deviation test device according to claim 4, characterized in that: The telescopic mechanism is an automatic telescopic device.

7. The bellows angle deviation test device according to claim 1, characterized in that: The support seat is supported by a lifting device installed in the machine body. The machine body is rotatably connected to two oblique arms symmetrically distributed on both sides of the support seat. The two oblique arms are respectively fixed with second guide members extending in a straight line. The two second flange seats are respectively slidably matched with the two second guide members, and the second flange seats are provided with locking bolts. An angle adjustment mechanism for adjusting the inclination angle of the two oblique arms is installed on the machine body.

8. The bellows angle deviation test device according to claim 7, characterized in that: The lifting device is provided with at least two lifting columns extending vertically upward, and the support seat is fixedly supported by the lifting columns.

9. The bellows angle deviation test device according to claim 7, characterized in that: The lower end of the oblique arm extends into the machine body, and the angle adjustment mechanism includes a driving mechanism and two pull rods. The lower ends of the two oblique arms are respectively connected to the driving mechanism through a pull rod.

10. The bellows angle deviation test device according to claim 1, characterized in that: The first flange seat and the second flange seat can be sealed and connected to the flange joint at the end of the bellows; at least one of the first flange seat and the second flange seat is connected to an exhaust hose that connects the inner cavity of the bellows with the vacuum generating system.

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