A fatigue test device for a welded structure

Abstract

The utility model relates to related technical field of fatigue testing device, concretely is a kind of fatigue testing device for welded structure, including bottom plate and top plate, the one end of bottom plate is installed with lower clamping plate, the one end of top plate is installed with first telescopic part, the bottom of first telescopic part is installed with upper clamping plate, the middle part of top plate is installed with second telescopic part, the bottom of second telescopic part is installed with pressing plate, the other end of bottom plate is installed with first right angle lever, first right angle lever is connected with rotating sleeve, one end of rotating sleeve is connected with one end of clamping cylinder, the other end of top plate is installed with torsion assembly, the bottom of torsion assembly is connected with the outer wall of rotating sleeve, press the type fatigue test and torsional fatigue test of the connecting place of first columnar part and second columnar part are realized respectively by pressing block and torsion assembly, the position of first columnar part is adjusted by the bottom of lower clamping plate being installed with rotating frame, test is accurate, convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of fatigue testing devices, specifically a fatigue testing device for welded structures. Background Technology

[0002] A columnar connector is formed by joining two columnar components, including steel rods and steel pipes. In construction, two rods or pipes are often welded together for use. To ensure the weld strength, fatigue tests need to be performed on the welded columnar components. Conventional fatigue testing devices mostly adopt a pressing structure, which performs fatigue tests by fixing one columnar component and pressing the other columnar component. The testing method is simple, lacks torque testing, and requires manual rotation of the columnar components to adjust the pressing position, which is inconvenient. Therefore, those skilled in the art have proposed a fatigue testing device for welded structures to solve the problems mentioned in the background. Utility Model Content

[0003] The purpose of this invention is to provide a fatigue testing device for welded structures to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A fatigue testing device for welded structures includes a base plate, a top plate mounted on the base plate via a column, a lower clamping plate mounted on one end of the base plate via a mounting bracket, a first telescopic member mounted on one end of the top plate, an upper clamping plate mounted on the bottom end of the first telescopic member, the upper clamping plate being directly above the lower clamping plate, a second telescopic member mounted in the middle of the top plate, a pressing plate mounted on the bottom end of the second telescopic member, a first right-angle rod mounted on the top of the other end of the base plate, a rotating sleeve rotatably connected to the top of the first right-angle rod, one end of the outer wall of the rotating sleeve being connected to one end of a clamping cylinder via several second right-angle rods evenly distributed around the circumference of the clamping cylinder, the clamping cylinder and the rotating sleeve having a common central axis, a torsion assembly mounted on the other end of the top plate, the bottom of the torsion assembly being connected to the other end of the outer wall of the rotating sleeve, and a rotating frame mounted on the bottom of the lower clamping plate.

[0006] As a further improvement of this utility model: a lifting rod is installed on the inner bottom surface of the rotating frame, a slot is provided at the bottom of the lower clamping plate, and a rotating component is installed at the top of the lifting rod.

[0007] As a further embodiment of this utility model: the rotating assembly includes a lifting plate installed at the top of the lifting rod and two support rollers symmetrically and rotatably connected to the top of the lifting plate via vertical plates. A driving component is installed on the outer wall of one of the vertical plates, and the output end of the driving component is connected to one end of the corresponding support roller.

[0008] As a further improvement of this utility model: third telescopic members are installed on both sides of the clamping cylinder, and the two third telescopic members extend into the clamping cylinder at their closest points and are connected to side clamping plates.

[0009] As a further embodiment of this utility model: the torsion assembly includes a fourth telescopic member and a rotating rod. The top end of the fourth telescopic member is rotatably connected to the bottom end of the top plate, the bottom end of the fourth telescopic member is rotatably connected to the top end of the rotating rod, and the bottom end of the rotating rod is fixedly connected to the outer wall of one end of the rotating sleeve.

[0010] This invention has the following advantages: The device clamps and fixes the first columnar member through the cooperation of the first telescopic member, the upper clamping plate, and the lower clamping plate; it presses the second columnar member through the cooperation of the second telescopic member and the pressing block, thereby conducting a pressing fatigue test on the connection between the first and second columnar members; the first columnar member is supported by the lifting rod driving the rotating component upward; and then the first columnar member is rotated by the rotating component, thereby realizing the automatic rotation of the first columnar member, which facilitates the adjustment of the angle for pressing fatigue testing; by setting the clamping cylinder and the torsion component to cooperate, the second columnar member can be twisted, thereby conducting a torsional fatigue test on the connection between the first and second columnar members. The test is more thorough, the test results are more accurate, and the operation is convenient, quick, and highly automated. Attached Figure Description

[0011] Figure 1 This is a side view of the overall structure of an embodiment of the present utility model.

[0012] Figure 2 This is a front view of the fit between the upper and lower clamping plates in an embodiment of this utility model.

[0013] Figure 3 This is a front view of the clamping cylinder and the torsion assembly in an embodiment of this utility model.

[0014] Figure 4 This is a schematic diagram of the rotating component in an embodiment of the present invention.

[0015] In the diagram: 1. Base plate; 2. Column; 3. Top plate; 4. Mounting frame; 5. Lower clamping plate; 6. Rotating frame; 7. Lifting rod; 8. First telescopic component; 9. Upper clamping plate; 10. Second telescopic component; 11. Pressing block; 12. First right-angle rod; 13. Rotating sleeve; 14. Second right-angle rod; 15. Clamping cylinder; 16. Torsion assembly; 17. Third telescopic component; 18. Side clamping plate; 19. Fourth telescopic component; 20. Rotating rod; 21. Rotating assembly; 22. Lifting plate; 23. Vertical plate; 24. Support roller; 25. Drive component; 26. Groove. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0020] Example 1: Please refer to Figures 1 to 3A fatigue testing device for welded structures includes a base plate 1, a top plate 3 mounted on the top of the base plate 1 via a column 2, a lower clamping plate 5 mounted on the top of one end of the base plate 1 via a mounting bracket 4, a first telescopic member 8 mounted on one end of the top plate 3, an upper clamping plate 9 mounted on the bottom end of the first telescopic member 8, the upper clamping plate 9 being directly above the lower clamping plate 5, a second telescopic member 10 mounted in the middle of the top plate 3, a pressing plate mounted on the bottom end of the second telescopic member 10, and a [missing information - likely a device name or design]. The first right-angle rod 12 has a rotating sleeve 13 rotatably connected to its top. One end of the outer wall of the rotating sleeve 13 is connected to one end of the clamping cylinder 15 via several second right-angle rods 14. The several second right-angle rods 14 are evenly distributed around the circumference of the clamping cylinder 15. The clamping cylinder 15 and the rotating sleeve 13 have a common central axis. The other end of the top plate 3 is equipped with a torsion assembly 16. The bottom of the torsion assembly 16 is connected to the other end of the outer wall of the rotating sleeve 13. The bottom of the lower clamping plate 5 is equipped with a rotating frame 6.

[0021] Please see Figure 1 , Figure 2 , Figure 4 The inner bottom surface of the rotating frame 6 is equipped with a lifting rod 7, the bottom of the lower clamping plate 5 is provided with a slot 26, and the top of the lifting rod 7 is equipped with a rotating assembly 21. The rotating assembly 21 includes a lifting plate 22 installed at the top of the lifting rod 7 and two support rollers 24 symmetrically and rotatably connected to the top of the lifting plate 22 via a vertical plate 23. A driving member 25 is installed on the outer wall of one of the vertical plates 23. The output end of the driving member 25 is connected to one end of the corresponding support roller 24. The support roller 24 is arranged parallel to the first columnar member.

[0022] Example 2: See Figures 1 to 3 Based on Embodiment 1, third telescopic members 17 are installed on both sides of the clamping cylinder 15. The two third telescopic members 17 extend into the clamping cylinder 15 at their respective close ends and are connected to side clamping plates 18. The upper clamping plate 9, lower clamping plate 5, and side clamping plate 18 are all installed at the ends of the corresponding telescopic members in a detachable manner. The shape and size of the upper clamping plate 9, lower clamping plate 5, and side clamping plate 18 correspond to the outer shape and size of the first columnar member and the second columnar member.

[0023] Please see Figure 1 , Figure 3 The torsion assembly 16 includes a fourth telescopic member 19 and a rotating rod 20. The top end of the fourth telescopic member 19 is rotatably connected to the bottom end of the top plate 3, and the bottom end of the fourth telescopic member 19 is rotatably connected to the top end of the rotating rod 20. The bottom end of the rotating rod 20 is fixedly connected to the outer wall of one end of the rotating sleeve 13.

[0024] Working principle: The models of the first telescopic component 8, the second telescopic component 10, the third telescopic component 17, the lifting rod 7, and the driving component 25 can be selected from existing technologies. Each component is connected to an external control circuit. Pressure sensors are installed on the second telescopic component 10 and the fourth telescopic component 19 to detect and control the pressing force and turning force, respectively. In use, the first columnar component is placed on the lower clamping plate 5, and the second columnar component is placed below the pressing block 11. The first telescopic component 8 drives the upper clamping plate 9 to move down to clamp the first columnar component. The second telescopic component 10 drives the pressing block 11 to move down to press the second columnar component, thereby conducting a pressing fatigue test on the weld between the first and second columnar components to relieve fatigue. The upper clamping plate 9 is clamped by the lifting rod 7 driving the support roller 24 to move upward to support the first columnar member. Then, the driving member 25 drives the support roller 24 to rotate, thereby driving the first columnar member to rotate, realizing the adjustment of the pressing position for the pressing fatigue test. After the second columnar member is placed in the clamping cylinder 15, the third telescopic member 17 drives the side clamping plate 18 to move to clamp the second columnar member. The fourth telescopic member 19 repeatedly extends or shortens to drive the rotating sleeve 13 to rotate, thereby driving the clamping cylinder 15 to rotate, thereby twisting the second columnar member, realizing the torsional fatigue test at the connection between the first and second columnar members. The inner circumference of the upper clamping plate 9, the lower clamping plate 5, and the side clamping plate 18 are all provided with anti-slip pads to ensure clamping stability.

[0025] All components of this utility model are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fatigue testing device for welded structures, comprising a base plate, characterized in that, A top plate is mounted on the top of the base plate via a column. A lower clamping plate is mounted on the top of one end of the base plate via a mounting bracket. A first telescopic member is mounted on one end of the top plate, and an upper clamping plate is mounted on the bottom end of the first telescopic member. The upper clamping plate is located directly above the lower clamping plate. A second telescopic member is mounted in the middle of the top plate, and a pressing plate is mounted on the bottom end of the second telescopic member. A first right-angle rod is mounted on the top of the other end of the base plate. A rotating sleeve is rotatably connected to the top of the first right-angle rod. One end of the outer wall of the rotating sleeve is connected to one end of the clamping cylinder via several second right-angle rods. The several second right-angle rods are evenly distributed around the circumference of the clamping cylinder. The clamping cylinder and the rotating sleeve have a common central axis. A torsion assembly is mounted on the other end of the top plate, and the bottom of the torsion assembly is connected to the other end of the outer wall of the rotating sleeve. A rotating frame is mounted on the bottom of the lower clamping plate.

2. The fatigue testing device for welded structures according to claim 1, characterized in that, A lifting rod is installed on the inner bottom surface of the rotating frame, a slot is provided at the bottom of the lower clamping plate, and a rotating component is installed at the top of the lifting rod.

3. The fatigue testing device for welded structures according to claim 2, characterized in that, The rotating assembly includes a lifting plate mounted on the top of the lifting rod and two support rollers symmetrically and rotatably connected to the top of the lifting plate via vertical plates. A driving component is mounted on the outer wall of one of the vertical plates, and the output end of the driving component is connected to one end of the corresponding support roller.

4. The fatigue testing device for welded structures according to claim 1, characterized in that, The clamping cylinder is equipped with third telescopic members on both sides, and the two third telescopic members extend into the clamping cylinder at their closest points and are connected to side clamping plates.

5. The fatigue testing device for welded structures according to claim 4, characterized in that, The torsion assembly includes a fourth telescopic member and a rotating rod. The top end of the fourth telescopic member is rotatably connected to the bottom end of the top plate, and the bottom end of the fourth telescopic member is rotatably connected to the top end of the rotating rod. The bottom end of the rotating rod is fixedly connected to the outer wall of one end of the rotating sleeve.

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