A tensile and torsional testing device for LNG flexible pipe

Abstract

The utility model discloses a kind of tension-torsion testing devices of LNG flexible pipeline, including machine table, left mounting seat one and left mounting seat two are fixed in one side of machine table, servo motor is fixed on left mounting seat one, torque sensor is fixed on left mounting seat two, torque sensor and servo motor are connected by shaft coupling, right mounting seat one and right mounting seat two are fixed in the other side of machine table, cylinder is fixed on right mounting seat one, guide block is fixed on right mounting seat two, movable rod is slidably connected horizontally on guide block, tension sensor is connected between movable rod and cylinder, torque sensor and movable rod are also connected with connecting disc, connecting disc and pipeline clamping assembly are detachably connected, pipeline clamping assembly includes work disc, support head is fixed on work disc, work disc is connected by steel wire rope and hoop, connecting hole one is set on work disc, connecting hole two is set on connecting disc, fastener is arranged in connecting hole one and connecting hole two, and connecting disc and work disc are fixed together.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a tension and torsion testing device for LNG flexible pipelines. Background Technology

[0002] During LNG unloading, flexible LNG pipelines effectively buffer pressure fluctuations, preventing leaks or explosions. Their excellent flexibility allows for easy bending and folding for convenient transportation and use. Furthermore, they offer superior sealing performance and a long service life. In short, flexible LNG pipelines not only ensure the safety of unloading operations but also provide significant convenience for operators. In practical applications, they will withstand various loads such as tension and torque. To ensure their performance, tensile and torsional testing is essential. Additionally, to facilitate the assembly and disassembly of LNG flexible pipelines and ensure reliable clamping, it is necessary to design a tensile and torsional testing device for LNG flexible pipelines. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a tensile-torsion testing device for LNG flexible pipelines.

[0004] To achieve the above objectives, the technical solution of this utility model is: a tension and torsion testing device for LNG flexible pipelines, comprising a machine base, with a left mounting seat 1 and a left mounting seat 2 fixed on one side of the machine base. A servo motor is fixed on the left mounting seat 1, and a torque sensor is fixed on the left mounting seat 2. The torque sensor and the servo motor are connected via a coupling. A right mounting seat 1 and a right mounting seat 2 are fixed on the other side of the machine base. A cylinder is fixed on the right mounting seat 1, and a guide block is fixed on the right mounting seat 2. A movable rod is horizontally slidably connected to the guide block. A tension sensor is connected between the movable rod and the cylinder. Both the torque sensor and the movable rod are connected to the connecting plate. The connecting plate and the pipe clamping assembly are detachably connected. The pipe clamping assembly includes a working plate with a support head fixed on it. The working plate is connected to a clamp by a steel wire rope and a clamp. With the cooperation of the clamp and the support head, the end of the LNG flexible pipe can be clamped. A first connection hole is opened on the working plate, and a second connection hole is opened on the connecting plate. Fasteners are inserted into the first and second connection holes to fix the connecting plate and the working plate together.

[0005] The working disc also has two protruding posts, and the connecting disc has recessed grooves that mate with the protruding posts.

[0006] The work plate is also fixed with two handles.

[0007] The support head includes an inlet portion with a bevel and a support portion with knurling.

[0008] A control box is also installed on the machine.

[0009] By adopting the above technical solution, the beneficial effects of this utility model are: In this utility model, the pipe clamping assembly adopts a structure that combines a clamp and a support head. The guide part of the support head facilitates quick insertion of the pipe end, and the knurled design of the support part increases the friction with the inner wall of the pipe. Combined with the clamping of the clamp, it can effectively prevent the pipe from slipping or falling off during the test, ensuring the reliability of the clamping. The connecting plate and the working plate are connected by fasteners, and the positioning is achieved by the cooperation of the protruding post and the recessed groove. This not only ensures the stability of the connection between the two, but also facilitates the quick assembly and disassembly of the pipe clamping assembly, improving the testing efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the planar structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the removed portion of this utility model; In the diagram, 1. Machine base; 2. Left mounting seat one; 3. Servo motor; 4. Coupling; 5. Left mounting seat two; 6. Torque sensor; 7. Working disc; 7a. Protruding column; 7b. Connecting hole one; 7c. Handle; 8. Connecting disc; 8a. Recessed groove; 8b. Connecting two; 9. Movable rod; 10. Guide block; 11. Right mounting seat two; 12. Tension sensor; 13. Cylinder; 14. Right mounting seat one; 15. Control box; 16. Support head; 16a. Inlet part; 16b. Support part; 17. Clamp; 18. Steel wire rope; 19. Fastener; 20. LNG flexible pipeline. Detailed Implementation

[0011] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0012] like Figure 1-2As shown, the tension and torsion testing device for this LNG flexible pipeline includes a machine base 1. A left mounting base 1 (2) and a left mounting base 2 (5) are fixed on one side of the machine base 1. A servo motor 3 is fixed on the left mounting base 1 (2), and a torque sensor 6 is fixed on the left mounting base 2 (5). The torque sensor 6 and the servo motor 3 are connected via a coupling 4. A right mounting base 1 (14) and a right mounting base 2 (11) are fixed on the other side of the machine base 1. A cylinder 13 is fixed on the right mounting base 14, and a guide block 10 is fixed on the right mounting base 2 (11). A movable rod 9 is horizontally slidably connected to the guide block 10. A tension sensor 12 is connected between the movable rod 9 and the cylinder 13. The torque sensor 6 and the movable rod 9 are also connected to a connecting plate 8. The connecting plate 8 and the pipeline clamping assembly are detachably connected. The pipeline clamping assembly includes a working plate 7, on which a support head 16 is fixed. The working plate 7 has a through-hole... The steel wire rope 18 is connected to the clamp 17, and with the cooperation of the clamp 17 and the support head 16, the end of the LNG flexible pipe 20 can be clamped. The working plate 7 has a first connection hole 7b, and the connecting plate 8 has a second connection hole 8b. Fasteners 19 are inserted into the first connection hole 7b and the second connection hole to fix the connecting plate 8 and the working plate 7 together. In practice, the end of the LNG flexible pipe 20 is inserted into the support head 16 and the end of the LNG flexible pipe 20 is fixed with the clamp 17. There can be two pairs of pipe clamping components. One pair is installed on the machine 1 for tension and torsion testing, while the other pair can be installed and fixed in advance for the next LNG flexible pipe 20 to be tested. Then, only four fasteners 19 need to be installed and removed to complete the installation of the LNG flexible pipe 20 on the machine 1 or to remove it from the machine 1.

[0013] The working disc 7 also has two protruding posts 7a, and the connecting disc 8 has a recessed groove 8a that mates with the protruding posts 7a.

[0014] Two handles 7c are also fixed on the work plate 7. The handles 7c on the work plate 7 are designed to make it easy for operators to pick up and install the pipe clamping components, further improving the convenience of operation.

[0015] The support head 16 includes an inlet portion 16a with a bevel and a support portion 16b with knurling.

[0016] The machine 1 is also equipped with a control box 15. The control box 15 is set up to facilitate centralized control and data acquisition of the entire testing process, making the testing operation more intelligent and precise. This adopts existing technology, and its circuits do not need to be redesigned.

[0017] This invention, by incorporating a servo motor 3, a torque sensor 6, a cylinder 13, and a tension sensor 12, can simultaneously apply tension and torque to the LNG flexible pipeline 20, achieving a combined tension-torsion test and comprehensively evaluating the performance of the LNG flexible pipeline 20 under complex stress conditions. The pipeline clamping assembly adopts a structure where a clamp 17 and a support head 16 cooperate. The guide part 16a of the support head 16 facilitates quick insertion of the pipeline end, and the knurled design of the support part 16b increases the friction with the inner wall of the pipeline. Combined with the clamping of the clamp 17, it can effectively prevent the pipeline from slipping or falling off during the test, ensuring the reliability of the clamping. The connecting plate 8 and the working plate 7 are connected by fasteners 19, and the positioning is achieved by the cooperation of the protruding post 7a and the recessed groove 8a, which not only ensures the stability of the connection between the two but also facilitates the quick assembly and disassembly of the pipeline clamping assembly, improving testing efficiency.

[0018] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0019] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A tensile-torsion testing device for LNG flexible pipelines, comprising a machine base (1), characterized in that, The machine base (1) is fixed with a left mounting seat 1 (2) and a left mounting seat 2 (5) on one side. A servo motor (3) is fixed on the left mounting seat 1 (2), and a torque sensor (6) is fixed on the left mounting seat 2 (5). The torque sensor (6) and the servo motor (3) are connected by a coupling (4). The machine base (1) is fixed with a right mounting seat 1 (14) and a right mounting seat 2 (11) on the other side. A cylinder (13) is fixed on the right mounting seat 1 (14), and a guide block (10) is fixed on the right mounting seat 2 (11). A movable rod (9) is horizontally slidably connected to the guide block (10). A tension sensor (12) is connected between the movable rod (9) and the cylinder (13). The moment sensor (6) and the movable rod (9) are also connected to the connecting plate (8). The connecting plate (8) and the pipe clamping assembly are detachably connected. The pipe clamping assembly includes a working plate (7). A support head (16) is fixed on the working plate (7). The working plate (7) is connected to a clamp (17) by a wire rope (18). With the cooperation of the clamp (17) and the support head (16), the end of the LNG flexible pipe (20) can be clamped. A first connection hole (7b) is opened on the working plate (7). A second connection hole (8b) is opened on the connecting plate (8). Fasteners (19) are inserted into the first connection hole (7b) and the second connection hole and fix the connecting plate (8) and the working plate (7) together.

2. The tensile-torsion testing device for an LNG flexible pipeline according to claim 1, characterized in that, The working disc (7) also has two protruding posts (7a), and the connecting disc (8) has a recessed groove (8a) that matches the protruding posts (7a).

3. The tensile-torsion testing device for an LNG flexible pipeline according to claim 2, characterized in that, Two handles (7c) are also fixed on the work plate (7).

4. The tensile-torsion testing device for an LNG flexible pipeline according to claim 1, characterized in that, The support head (16) includes an inlet portion (16a) with a bevel and a support portion (16b) with knurling.

5. The tensile-torsion testing device for an LNG flexible pipeline according to claim 1, characterized in that, The machine tool (1) is also equipped with a control box (15).

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