Bending fatigue testing device suitable for composite hoses of various sizes

Abstract

According to the bending fatigue testing device suitable for the composite hoses of various sizes, the two turntables are arranged, the eccentric connecting shafts are arranged on the turntables, and the two turntables are driven by the transmission assembly to synchronously rotate clockwise and anticlockwise respectively; the two ends hung on the composite hose can be close to each other or far away from each other, bending of the composite hose can be achieved, electrical switching is needed in the whole test process, and the structure is simple. The rotary table can be movably arranged in the horizontal direction so as to be close to or far away from each other, and composite hoses of different sizes and specifications can be connected; and meanwhile, a plurality of first connecting parts with different distances from the axis of the rotating disc are arranged on the rotating disc, and the connecting shafts are detachably arranged on the two first connecting parts at the same positions on the two rotating discs correspondingly, so that the device is further suitable for more composite hoses with different sizes and specifications.

Description

Technical Field

[0001] The utility model relates to the technical field of performance testing devices for composite hoses, in particular to a bending fatigue testing device suitable for composite hoses of various sizes. Background Art

[0002] LNG is liquefied natural gas, which is usually transported by LNG tankers after a series of ultra-low temperature liquefaction. The offshore use environment is complex, and the required product performance requirements are relatively high. Since the temperature of LNG reaches -161.5℃, the safety and sealing performance during transportation are particularly important. As the main component of LNG transportation on LNG tankers, the performance of LNG cryogenic composite hose directly affects the safety of the entire LNG transportation system. Therefore, LNG cryogenic composite hose needs to be fully verified before it can be used on board; and the existing test equipment, especially the bending fatigue test equipment, usually adopts mechanical linear reciprocating motion, and electrical switching is required during the entire test process. Its structure is complex and it cannot be applied to composite hoses of various sizes. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a bending fatigue testing device suitable for composite hoses of various sizes to solve the above problems.

[0004] The utility model adopts the following scheme:

[0005] The present application provides a bending fatigue testing device applicable to composite hoses of various sizes, comprising a frame, a transmission assembly arranged on the frame, and also comprising two turntables, two connecting shafts and two connecting assemblies;

[0006] The two rotating disks are rotatably arranged on the frame and can be moved in the horizontal direction; the rotating disk is provided with a plurality of first connecting parts with different distances from the axis of the rotating disk; the two connecting shafts are respectively detachably arranged on the two first connecting parts at the same position on the two rotating disks; the connecting assembly is movably arranged on the connecting shaft;

[0007] The connecting assembly is used to seal and connect the two ends of the composite hose; the transmission assembly is used to drive the two rotating disks to rotate synchronously clockwise and counterclockwise respectively, so that the two ends of the composite hose are close to each other or away from each other.

[0008] Furthermore, a plurality of second connection parts are arranged on the frame in a horizontal direction for rotatably connecting the turntable.

[0009] Furthermore, a plurality of the first connection portions are evenly distributed in a straight line along a radial direction of the turntable, or evenly distributed in a cross shape along radial directions perpendicular to each other.

[0010] Furthermore, the first connecting portion is a threaded hole, a straight-shaped mounting groove, or a cross-shaped mounting groove.

[0011] Furthermore, the connecting assembly includes a bearing seat, a blind plate connected to the bearing seat, and a bearing arranged on the bearing seat; the bearing is rotatably arranged on the connecting shaft; and flanges connected to the blind plate are arranged at both ends of the composite hose.

[0012] Furthermore, one of the blind plates is provided with a filling port, and the other blind plate is provided with an exhaust port.

[0013] Furthermore, a pressure detection device is provided on the filling port.

[0014] Furthermore, when the connection axes on the two rotating disks are farthest apart, the composite hose is in a straightened state; when the connection axes on the two rotating disks are closest apart, the composite hose reaches a desired bending radius.

[0015] Furthermore, the transmission assembly includes a driving motor, a reversing gear box, a coupling, a bearing seat, multiple first transmission shafts, and two second transmission shafts; the motor is connected to one of the reversing gear boxes through a chain drive; the reversing gear box is connected to the first transmission shaft through the coupling, and is connected to the other reversing gear box; two bearing seats are installed on the shaft of each transmission shaft; the two second transmission shafts are rotatably arranged on the frame, one end of which is connected to the axis of the turntable, and the other end is connected to the reversing gear box by chain drive.

[0016] Furthermore, a sensor for counting the number of times the composite hose is bent is included.

[0017] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0018] The utility model provides a bending fatigue test device suitable for composite hoses of various sizes. Through the arrangement of two turntables and the arrangement of an eccentric connecting shaft on the turntable, the two turntables are driven by a transmission component to rotate synchronously clockwise and counterclockwise respectively, so that the two ends of the composite hose suspended can be brought closer to or farther away from each other, thereby realizing the bending of the composite hose. The electrical switching is required during the entire test process, and the structure is simple. The turntable can be moved in the horizontal direction to be closer to or farther away from each other, and composite hoses of different sizes and specifications can be connected; at the same time, a plurality of first connecting parts with different distances from the axis of the turntable are arranged on the turntable, and the connecting shafts can be detachably arranged on the two first connecting parts at the same position on the two turntables, further applicable to composite hoses of more different sizes and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of a bending fatigue testing device applicable to composite hoses of various sizes according to an embodiment of the utility model, in which the composite hose is in a straightened state;

[0021] Figure 2 This is a schematic diagram of a bending fatigue testing device applicable to composite hoses of various sizes according to an embodiment of the utility model, in which the composite hose is in a bent state;

[0022] Figure 3 This is a side structural diagram of a bending fatigue testing device suitable for composite hoses of various sizes according to an embodiment of the utility model.

[0023] Figure 4 This is a schematic diagram of another embodiment of the utility model, a bending fatigue testing device applicable to composite hoses of various sizes, in which the composite hose is in a straightened state;

[0024] Figure 5 This is a schematic diagram of another embodiment of the utility model, a bending fatigue testing device applicable to composite hoses of various sizes, in which the composite hose is in a bent state;

[0025] Figure 6 It is another embodiment of the utility model, a bending fatigue testing device suitable for composite hoses of various sizes;

[0026] Icons: frame 1, turntable 2, connecting shaft 3, connecting assembly 4, composite hose 5, driving motor 6, reversing gear box 7, bearing seat 8, first transmission shaft 9, second transmission shaft 10, mounting groove 11, coupling 12. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] Example

[0029] Combination Figures 1 to 6 As shown, this embodiment provides a bending fatigue testing device applicable to composite hoses of various sizes, including a frame 1, a transmission assembly arranged on the frame 1, and also including two turntables 2, two connecting shafts 3 and two connecting assemblies 4;

[0030] The two rotating disks 2 are rotatably arranged on the frame 1 and can be moved in the horizontal direction; the rotating disk 2 is provided with a plurality of first connecting parts with different distances from the axis of the rotating disk 2; the two connecting shafts 3 are respectively detachably arranged on the two first connecting parts at the same position on the two rotating disks 2; the connecting assembly 4 is movably arranged on the connecting shaft 3;

[0031] The connecting assembly 4 is used to seal and connect the two ends of the composite hose 5; the transmission assembly is used to drive the two turntables 2 to rotate synchronously clockwise and counterclockwise respectively, so that the two ends of the composite hose 5 are close to each other or away from each other.

[0032] Specifically, in this embodiment, the frame 1 is provided with a plurality of second connection parts arranged in parallel in the horizontal direction for rotatable connection of the turntable 2. The connection assembly 4 includes a bearing seat 8, a blind plate connected to the bearing seat 8, and a bearing arranged on the bearing seat 8; the bearing is rotatably arranged on the connection shaft 3; flanges connected to the blind plates are arranged at both ends of the composite hose 5; a filling port is arranged on one of the blind plates, and an exhaust port is arranged on the other blind plate, so as to facilitate the filling of liquid nitrogen into the composite hose 5 according to the test standard. A pressure detection device is arranged on the filling port so as to understand the pressure in the composite hose at all times. The transmission assembly includes a driving motor 6, a reversing gear box 7, a coupling 12, a bearing seat 8, multiple first transmission shafts 9, and two second transmission shafts 10; the reversing gear box 7 is connected to the first transmission shaft 9 through the coupling 12; two bearing seats 8 are installed on the shaft of each transmission shaft; the two second transmission shafts 10 are rotatably arranged on the second connecting part through the bearing seat 8, one end of which is connected to the axis of the turntable 2, and the other end is chain-drivenly connected to the driving motor 6 and the reversing gear box 7 respectively.

[0033] In this embodiment, a sensor for counting the number of times the composite hose 5 is bent is also included; the sensor is arranged on the frame 1, and an induction element adapted to the sensor is eccentrically arranged on the shaft disc at the other end of the second transmission shaft 10. The setting of the counting sensor makes it easier to understand the number of times the composite hose is bent more clearly and intuitively, so as to remind the tester when to collect the corresponding data during the test. It should be noted that when the fatigue testing device is in the bending operation, when the connection shafts 3 on the two turntables 2 are farthest apart, the composite hose 5 is in a straight state; when the connection shafts 3 on the two turntables 2 are closest to each other, the composite hose 5 reaches the required bending radius.

[0034] Preferably, a plurality of the first connecting portions are evenly distributed along the radial direction of the turntable 2, which facilitates that the two connecting shafts 3 are respectively arranged on the two first connecting portions at the same position on the two turntables 2, so that when the two turntables 2 rotate synchronously clockwise and counterclockwise respectively, the two connecting shafts 3 can synchronously approach or move away from each other, thereby realizing the bending of the composite hose 5.

[0035] Preferably, the first connection portion is a threaded hole, which facilitates the quick and detachable connection of the connecting shaft 3, so as to better adapt to the composite hose 5 of different sizes. Figure 6 The first connecting portion may also be a straight or cross-shaped mounting groove 11 , so that the connecting shaft 3 can be quickly moved and fixed on the mounting groove 11 .

[0036] The utility model provides a bending fatigue test device suitable for composite hoses of various sizes. Through the arrangement of two turntables 2 and the arrangement of an eccentric connecting shaft 3 on the turntable 2, the two turntables 2 are driven by a transmission component to rotate synchronously clockwise and counterclockwise respectively, so that the two ends of the composite hose 5 suspended thereon can be brought closer to or farther from each other, thereby realizing the bending of the composite hose 5. The turntable 2 needs to be electrically switched during the entire test process, and the structure is simple. The turntable 2 can be moved in the horizontal direction to be brought closer to or farther from each other, and composite hoses 5 of different sizes and specifications can be connected. At the same time, the turntable 2 is provided with a plurality of first connecting parts with different distances from the axis of the turntable 2, and the connecting shaft 3 can be detachably arranged on the two first connecting parts at the same position on the two turntables 2, respectively, so as to further be suitable for composite hoses 5 of more different sizes and specifications.

[0037] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

Claims

1. A bending fatigue testing device suitable for composite hoses of various sizes, comprising a frame and a transmission assembly arranged on the frame, characterized in that: Also included are two turntables, two connecting shafts, and two connecting components; The two rotating disks are rotatably arranged on the frame and can be moved in the horizontal direction; the rotating disk is provided with a plurality of first connecting parts with different distances from the axis of the rotating disk; the two connecting shafts are respectively detachably arranged on the two first connecting parts at the same position on the two rotating disks; the connecting assembly is movably arranged on the connecting shaft; The connecting assembly is used to seal and connect the two ends of the composite hose; the transmission assembly is used to drive the two rotating disks to rotate synchronously clockwise and counterclockwise respectively, so that the two ends of the composite hose are close to each other or away from each other.

2. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 1 is characterized in that: A plurality of second connection parts are arranged on the frame in a horizontal direction for rotatably connecting the turntable.

3. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 1 is characterized in that: The plurality of first connection portions are evenly distributed along the radial direction of the rotating disk to form a straight line, or evenly distributed along radial directions perpendicular to each other to form a cross.

4. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 3 is characterized in that: The first connecting portion is a threaded hole, a straight-shaped mounting groove, or a cross-shaped mounting groove.

5. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 1, characterized in that: The connecting assembly includes a bearing seat, a blind plate connected to the bearing seat, and a bearing arranged on the bearing seat; the bearing is rotatably arranged on the connecting shaft; and flanges connected to the blind plate are arranged at both ends of the composite hose.

6. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 5, characterized in that: One of the blind plates is provided with a filling port, and the other blind plate is provided with an exhaust port.

7. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 6, characterized in that: The filling port is provided with a pressure detection device.

8. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 1, characterized in that: When the connection axes on the two rotating disks are farthest apart, the composite hose is in a straightened state; when the connection axes on the two rotating disks are closest apart, the composite hose reaches a desired bending radius.

9. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 2, characterized in that: The transmission assembly includes a driving motor, a reversing gear box, a coupling, a bearing seat, a plurality of first transmission shafts, and two second transmission shafts; the motor is connected to one of the reversing gear boxes through a chain drive; the reversing gear box is connected to the first transmission shaft through the coupling, and is connected to the other reversing gear box; two bearing seats are installed on the shaft of each transmission shaft; the two second transmission shafts are rotatably arranged on the frame, one end of which is connected to the axis of the turntable, and the other end is connected to the reversing gear box through a chain drive.

10. The bending fatigue testing device applicable to composite hoses of various sizes according to claim 1, characterized in that: A sensor for counting the number of times the composite hose is bent is also included.

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