Swing fatigue test device for metal bellows

Abstract

The utility model belongs to the technical field of metal bellows detection, and particularly relates to a metal bellows swing fatigue test device which comprises a support, an air cylinder installed on the support, a swing mechanism arranged below the air cylinder and two sets of locking mechanisms installed on the air cylinder and the swing mechanism respectively. The locking mechanism comprises a connecting frame, a fixing ring, a rotating table, a limiting pin, a screw rod, a sliding seat and a boss, and the fixing ring is installed on the connecting frame. By driving the air cylinder to move up and down and adjusting the position of the sliding seat, the metal corrugated pipes with different sizes can be positioned, the boss can ensure that the metal corrugated pipes are centered and positioned, angle adjustment is carried out through the rotating table, different angles of the metal corrugated pipes can be synchronously and rapidly adjusted, and the positioning accuracy is improved. And different positions of the metal corrugated pipe are detected, so that the operation time of workers is saved.

Description

Technical Field

[0001] This utility model relates to the field of metal bellows testing technology, and in particular to a metal bellows swaying fatigue testing device. Background Technology

[0002] A metal bellows is a multifunctional thin-walled tubular component with transverse corrugations and flexibility. Under the action of external forces and torques, it can produce axial, angular, lateral, and combined displacements. Metal bellows play an irreplaceable role in many systems and are critical components. Failure of a metal bellows can lead to the failure of a subsystem or the entire system; therefore, the reliability (fatigue life) of the bellows is one of the most important performance indicators.

[0003] Commonly used metal bellows swing fatigue testing devices typically use a single fixed component to position a metal bellows of a single specification, and try to place its center at the center of the testing device. However, when testing metal bellows of different specifications, it is cumbersome to change the fixed component, and it is not convenient to adjust the angle of the metal bellows to test different parts of it. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a metal bellows swaying fatigue testing device to solve the problems mentioned in the background art.

[0005] A metal bellows swing fatigue testing device includes a support, a cylinder mounted on the support, a swing mechanism disposed below the cylinder, and two sets of locking mechanisms respectively mounted on the cylinder and the swing mechanism. The locking mechanism includes a connecting frame, a fixed ring, a rotating table, a limiting pin, a screw, a sliding seat, and a boss. The fixed ring is mounted on the connecting frame, the rotating table is rotatably mounted in the middle of the fixed ring and can be limited to the fixed ring by the limiting pin, the sliding seat is slidably disposed in a groove opened in the rotating table, the screw is mounted on one end face of the limiting pin and is provided with a nut, the sliding seat can move along the screw and is locked by the nut, and the boss is mounted on the other end face of the locking mechanism.

[0006] The swing mechanism includes a fixed base, a dual-axis motor, a coil, a connecting line, a slide, and an extension arm. The dual-axis motor consists of two motors, each mounted at one end of the fixed base. The coil is fixed to the two output ends of the dual-axis motor. The slide slides along the fixed base. The extension arm is fixed to both sides of the slide. The coil is connected to the extension arm via the connecting line.

[0007] By adopting the above technical solution, it is convenient to position metal corrugated pipes of different sizes, and the different positions of the metal corrugated pipes can be quickly adjusted for testing, saving the operator's time.

[0008] Four limiting holes are made at equal angles on the fixed ring. Two ear plates are opposite each other on the side of the rotating table. The limiting pin can be inserted into the ear plates of the rotating table and the limiting holes of the fixed ring to limit the rotating table in the fixed ring. The ear plates of the rotating table of the two sets of locking mechanisms are all set on the upper side of the rotating table.

[0009] By adopting the above technical solution, it is convenient to adjust the position of the bellows.

[0010] The protrusions on the two sets of locking mechanisms are respectively located on opposite sides, and the protrusions are arranged in a frustum structure. The sides of the protrusions are provided with slots that correspond one-to-one with the positions of the sliding seats.

[0011] By adopting the above technical solution, it is possible to center and restrict the corrugated pipe.

[0012] The mounting base is U-shaped.

[0013] By adopting the above technical solution, the swaying test of metal bellows is performed.

[0014] The end of the extension arm away from the slide is positioned directly below the rotary table.

[0015] By adopting the above technical solution, limitations on the connection cable can be avoided.

[0016] The beneficial effects of this novel metal bellows swing fatigue testing device are:

[0017] By driving the cylinder to move up and down and adjusting the position of the sliding seat, it can be used to position metal bellows of different sizes. The boss can ensure that the metal bellows is centered and positioned. By adjusting the angle of the rotary table, different angles of the metal bellows can be adjusted simultaneously and quickly, and different positions of the metal bellows can be detected, saving the operator's time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the metal bellows swing fatigue testing device proposed in this utility model.

[0019] Figure 2 This is a diagram of the metal bellows swaying fatigue testing device proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the metal bellows swing fatigue testing device proposed in this utility model.

[0021] In the diagram: 1. Bracket; 2. Cylinder; 3. Locking mechanism; 301. Connecting frame; 302. Fixing ring; 303. Rotary table; 3031. Slide groove; 304. Limit pin; 305. Screw; 306. Sliding seat; 307. Boss; 3071. Groove; 4. Swinging mechanism; 401. Fixing seat; 402. Dual-axis motor; 403. Wire reel; 404. Connecting wire; 405. Sliding seat; 406. Extension arm. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0023] Reference Figure 1-3 A metal bellows swing fatigue testing device includes a support 1, a cylinder 2 mounted on the support 1, a swing mechanism 4 disposed below the cylinder 2, and two sets of locking mechanisms 3 respectively mounted on the cylinder 2 and the swing mechanism 4. The locking mechanism 3 includes a connecting frame 301, a fixed ring 302, a rotating table 303, a limiting pin 304, a screw 305, a sliding seat 306, and a boss 307. The fixed ring 302 is mounted on the connecting frame 301. The rotating table 303 is rotatably mounted in the middle of the fixed ring 302 and can be limited to the fixed ring 302 by the limiting pin 304. The sliding seat 306 is slidably disposed in the sliding groove 3031 opened on the rotating table 303. The screw 305 is mounted on one end face of the limiting pin 304 and is provided with a nut. The sliding seat 306 can move along the screw 305 and is locked by the nut. The boss 307 is mounted on the other end face of the locking mechanism 3.

[0024] The swing mechanism 4 includes a fixed base 401, a dual-axis motor 402, a coil 403, a connecting line 404, a slide 405, and an extension arm 406. The dual-axis motor 402 consists of two motors, which are respectively installed at both ends of the fixed base 401. The coil 403 is fixed at the two output ends of the dual-axis motor 402. The slide 405 slides along the fixed base 401. The extension arm 406 is fixed at both sides of the slide 405. The coil 403 is connected to the extension arm 406 through the connecting line 404.

[0025] According to the length of the metal bellows, the drive cylinder 2 pushes and pulls a set of locking mechanisms 3 at its output end to move up and down. According to the position of the slot at the flange of the metal bellows, the sliding seat 306 slides along the slide groove 3031. Then, the nut on the screw 305 is rotated to limit the sliding seat 306, so that the two ends of the metal bellows correspond to the bosses 307 of the two locking mechanisms 3 respectively. The external bolts are inserted into the holes at the sliding seat 306 and the flange of the metal bellows. Then, the external nut is used to tightly connect the metal bellows flange and the sliding seat 306, thus completing the positioning of the two ends of the metal bellows.

[0026] Then, two dual-axis motors 402 can be driven to drive the spool 403 at their output ends, so that one set of dual-axis motors 402 controls the spool 403 to release the wire, and the other set of dual-axis motors 402 controls the spool 403 to retract the wire, thereby driving the slide 405 to move along the track of the fixed seat 401, and then a set of locking mechanisms 3 on the swing mechanism 4 drives the metal bellows to swing.

[0027] During this process, the swing angle of the metal bellows can be changed. The limiting pin 304 is pulled out from the fixed ring 302, the rotating table 303 is rotated 90 degrees, and then the limiting pin 304 is inserted back into the fixed ring 302 to limit the rotating table 303. This allows for swing detection of the metal bellows at different positions. The fixed seat 401 is U-shaped, thus enabling the swing detection of the metal bellows.

[0028] This device facilitates the positioning of metal bellows of different sizes and allows for quick adjustment of the metal bellows to different positions for inspection, saving operators' time.

[0029] Four limiting holes are made at equal angles on the fixed ring 302. Two ear plates are placed opposite each other on the side of the rotating table 303. The limiting pin 304 can be inserted into the ear plate of the rotating table 303 and the limiting hole of the fixed ring 302 to limit the rotating table 303 in the fixed ring 302. The ear plates of the rotating table 303 of the two sets of locking mechanisms 3 are all set on the upper side of the rotating table 303; so as to facilitate the quick adjustment of the position of the metal bellows and to perform swing detection on the metal bellows at different angles.

[0030] The two sets of locking mechanisms 3 have protrusions 307 respectively located on opposite sides, and the protrusions 307 are arranged in a frustum structure. The sides of the protrusions 307 are provided with slots 3071 that correspond one-to-one with the positions of the sliding seats 306. The metal bellows is confined between the two protrusions 307. The arrangement of the protrusions 307 ensures that the metal bellows is placed in the center. By inserting bolts into the sliding seats 306 to connect the flanges of the metal bellows, the metal bellows is stably positioned and will not move.

[0031] The end of the extension arm 406 away from the slide 405 is positioned directly below the extended rotary table 303; this ensures a certain distance between the connecting line 404 and the fixing ring 302, preventing the connecting line 404 from being affected during the swing detection of the metal bellows, thus avoiding detection failure.

[0032] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A metal bellows swing fatigue testing device, comprising a support (1), a cylinder (2) mounted on the support (1), a swing mechanism (4) disposed below the cylinder (2), and two sets of locking mechanisms (3) respectively mounted on the cylinder (2) and the swing mechanism (4), characterized in that: The locking mechanism (3) includes a connecting frame (301), a fixed ring (302), a rotating platform (303), a limiting pin (304), a screw (305), a sliding seat (306), and a boss (307). The fixed ring (302) is mounted on the connecting frame (301). The rotating platform (303) is rotatably mounted on the middle of the fixed ring (302) and can be limited to the fixed ring (302) by the limiting pin (304). The sliding seat (306) is slidably disposed in the slide groove (3031) opened on the rotating platform (303). The screw (305) is mounted on one end face of the limiting pin (304) and is provided with a nut. The sliding seat (306) can move along the screw (305) and be locked by the nut. The boss (307) is mounted on the other end face of the locking mechanism (3). The swing mechanism (4) includes a fixed base (401), a dual-axis motor (402), a coil (403), a connecting line (404), a slide (405), and an extension arm (406). The dual-axis motor (402) consists of two motors respectively installed at both ends of the fixed base (401). The coil (403) is fixed at the two output ends of the dual-axis motor (402). The slide (405) slides along the fixed base (401). The extension arm (406) is fixed at both sides of the slide (405). The coil (403) is connected to the extension arm (406) through the connecting line (404).

2. The metal bellows oscillating fatigue testing device according to claim 1, characterized in that: Four limiting holes are opened at equal angles on the fixed ring (302). The rotating table (303) has two ear plates facing each other on its side. The limiting pin (304) can be inserted into the ear plate of the rotating table (303) and the limiting hole of the fixed ring (302) to limit the rotating table (303) in the fixed ring (302). The ear plates of the rotating table (303) of the two sets of locking mechanisms (3) are all set on the upper end side of the rotating table (303).

3. The metal bellows oscillation fatigue testing device according to claim 2, characterized in that: The bosses (307) on the two sets of locking mechanisms (3) are respectively set on opposite sides, and the bosses (307) are set in a frustum structure. The side of the bosses (307) is provided with slots (3071) that correspond one-to-one with the position of the sliding seat (306).

4. The metal bellows oscillation fatigue testing device according to claim 3, characterized in that: The fixing base (401) is arranged in a U-shape.

5. The metal bellows oscillating fatigue testing device according to claim 4, characterized in that: The end of the extension arm (406) away from the slide (405) is positioned directly below the rotating platform (303).

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