A ductile connection device to prevent pipe failure from fault locking stress release

Abstract

The application discloses a ductile connecting device for preventing pipeline damage caused by fault locking stress release, which is used for ductile connection of a first pipe body and a second pipe body, and comprises adjusting pipes, ductile connecting pipes and a base pipe, wherein the first pipe body and the second pipe body are respectively connected with an adjusting pipe on one side close to each other, the two adjusting pipes are respectively connected with a ductile connecting pipe on one side close to each other, and the two ductile connecting pipes are connected with an expansion pipe on one side close to each other; the two ductile connecting pipes and the expansion pipe are positioned in the same inner pipe and can move radially, axially and deflect in the inner pipe; and the inner pipe is positioned in the base pipe and can move radially in the base pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline connection, in particular to a ductile connection device for preventing pipeline damage caused by fault locking stress release. BACKGROUND

[0002] The Sino-Russian natural gas pipeline is under construction, and due to the complex terrain, it is inevitable to pass through the fault section. The creep deformation of the fault will cause the strain accumulation of the upper and lower plates of the fault, causing fault displacement, and the relative locking section of the fault, that is, the section where the fault is relatively static, will cause stress accumulation. This situation will cause relatively large stress accumulation. Once released, it will cause large displacement deformation. The current conventional pipeline structure is difficult to cope with such a situation.

[0003] Therefore, it is necessary to provide a ductile connection device for preventing pipeline damage caused by fault locking stress release to solve the problems raised in the background. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a ductile connection device for preventing pipeline damage caused by fault locking stress release, which is used for ductile connection of a first pipe body and a second pipe body, and comprises an adjusting pipe, a ductile connection pipe and a base pipe, wherein the side close to each other of the first pipe body and the second pipe body is respectively communicated with an adjusting pipe, the side close to each other of the two adjusting pipes is respectively communicated with a ductile connection pipe, and the side close to each other of the two ductile connection pipes is commonly connected with an expansion pipe.

[0005] The two ductile connection pipes and the expansion pipe are positioned in the same inner pipe and can move radially, axially and deflect in the inner pipe; the inner pipe is positioned in the base pipe and can move radially in the base pipe.

[0006] Further, as a preferred, the inner side of both ends of the inner pipe is fixed with a ring pad, the ring pad has elasticity, and the inner side of the ring pad is fixed with a first ring stopper.

[0007] Further, as a preferred, the inner surface of the first ring stopper is connected with the ductile connection pipe in sealing sliding mode.

[0008] Further, as a preferred, the end close to the expansion pipe of the ductile connection pipe is fixed with a second ring stopper, and the second ring stopper can be limited by the first ring stopper.

[0009] Further, as a preferred, the inner pipe is filled with a shear thickening agent.

[0010] Further, as a preferred, a plurality of springs are connected between the two second ring stoppers.

[0011] Further, as preferred, the outer surface of the two ends of the inner tube is connected with the inner surface of the base pipe by a plurality of buffer rods arranged in a circumferential direction.

[0012] Further, as preferred, the outer surface of the middle part of the inner tube is connected with the inner surface of the base pipe by a plurality of stabilizing mechanisms arranged in a circumferential direction, the stabilizing mechanism comprises a plurality of longitudinal bodies arranged in an array, two adjacent longitudinal bodies are connected by two horizontally symmetrically arranged horizontal frames, and an X-shaped frame is further connected between the two horizontal frames, and the longitudinal body is filled with a stabilizing pad.

[0013] Further, as preferred, the outer surface of the adjusting pipe is provided with a self-resetting assembly, the self-resetting assembly comprises a fixed ring, a support arm and a sliding ring, wherein the fixed ring is fixed to the outer surface of the adjusting pipe, a plurality of support arms are hinged on the circumferential direction of the fixed ring, the other end of the support arm is connected with a support block, the middle part of the support arm is hinged with a hinge arm, the hinge arm is hinged to the sliding ring, the sliding ring is slidingly sleeved on the outer surface of the adjusting pipe, and the sliding ring is connected with the fixed ring by a reset spring.

[0014] Further, as preferred, the base pipe is constructed in a hard stratum.

[0015] Compared with the prior art, the present application provides a ductile connecting device for preventing fault locking stress release from causing pipe damage, which has the following beneficial effects:

[0016] In the embodiment of the present application, the two ductile connecting pipes and the telescopic pipe are positioned in the same inner tube and can move radially, axially and deflect in the inner tube, thereby realizing the ductile connection between the first pipe body and the second pipe body, and the inner tube is positioned in the base pipe and can move radially in the base pipe, and for the above-mentioned possible movement modes, the device can buffer and absorb energy, greatly improving the stability of the device, and since the first pipe body and the second pipe body are ductilely connected, some movement will not particularly affect the transmission of fluid. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic diagram of a ductile connecting device for preventing fault locking stress release from causing pipe damage.

[0018] Fig. 2 It is a structural schematic diagram of a self-resetting assembly in a ductile connecting device for preventing fault locking stress release from causing pipe damage.

[0019] Fig. 3 It is an implementation schematic diagram of a ductile connecting device for preventing fault locking stress release from causing pipe damage.

[0020] In the figure: 1, the first pipe body; 2, the second pipe body; 3, the adjusting pipe; 4, the ductile connecting pipe; 5, the first ring stop; 6, the telescopic pipe; 7, the ring pad; 8, the second ring stop; 9, the self-resetting assembly; 10, the spring; 11, the shear thickening agent; 12, the buffer rod; 13, the longitudinal body; 14, the cross frame; 15, the X-shaped frame; 16, the inner pipe; 17, the base pipe; 91, the fixing ring; 92, the supporting arm; 93, the supporting block; 94, the sliding ring; 95, the articulated arm; 96, the reset spring. DETAILED DESCRIPTION

[0021] Embodiment: Please refer to Figs. 1-3 In the embodiment of the present application, a ductile connecting device for preventing pipeline damage caused by fault locking stress release is used for connecting a first pipe body 1 and a second pipe body 2 in series, which comprises an adjusting pipe 3, a ductile connecting pipe 4 and a base pipe 16, wherein the side close to each other of the first pipe body 1 and the second pipe body 2 is respectively connected with an adjusting pipe 3, and the length of the first pipe body 1 and the second pipe body 2 is often long, in order to well butt joint the two, the embodiment is provided with an adjusting pipe 3, and the length of the adjusting pipe 3 can be flexibly adjusted according to the actual situation;

[0022] The side close to each other of the two adjusting pipes 3 is respectively connected with a ductile connecting pipe 4, and the side close to each other of the two ductile connecting pipes 4 is commonly connected with a telescopic pipe 6;

[0023] In fact, the two ductile connecting pipes 4 and the telescopic pipe 6 are integrally formed, and can be configured as a preset structure;

[0024] Since the adjusting pipe 3 is configured, the length of the adjusting pipe 3 can be flexibly configured to adapt to the first pipe body, the second pipe body, the ductile connecting pipe and the like;

[0025] The length of the adjusting pipe 3 can be flexibly adjusted according to the actual situation, and the adjusting pipe 3 is not configured as a telescopic structure, but different lengths of the adjusting pipe 3 are selected or prepared according to the actual situation;

[0026] In addition, the adjusting pipe 3 and the first pipe body are connected by a flange structure, the adjusting pipe 3 and the second pipe body are connected by a flange structure, and the adjusting pipe 3 and the ductile connecting pipe 4 are connected by a flange structure;

[0027] Both the flexible connecting pipe 4 and the telescopic pipe 6 are positioned in the inner pipe 16 and can move radially, axially and deflect in the inner pipe 16, so as to realize the flexible connection between the first pipe body and the second pipe body. When the stratum where the first pipe body is located changes, the first pipe body can move upward or downward relative to the second pipe body, at this time, the first pipe body moves radially in the inner pipe 16; the first pipe body can move horizontally relative to the second pipe body, at this time, the first pipe body moves axially in the inner pipe 16; the first pipe body can deflect relative to the second pipe body, at this time, the first pipe body deflects in the inner pipe 16.

[0028] The inner pipe 16 is positioned in the base pipe 17 and can move radially in the base pipe 17, at this time, the whole inner pipe moves, that is, when the first pipe body and the second pipe body move upward, downward or horizontally synchronously, it is manifested that the inner pipe moves radially in the base pipe 17.

[0029] In fact, for the above-mentioned various possible moving modes, the embodiment can buffer and absorb energy, greatly improving the stability of the device, and because the first pipe body and the second pipe body are flexibly connected, some movements will not particularly affect the transmission of fluid.

[0030] In the embodiment, the inner side of both ends of the inner pipe 16 is fixed with a ring pad 7, the ring pad 7 has elasticity, the inner side of the ring pad 7 is fixed with a first ring stop 5.

[0031] In addition, the inner surface of the first ring stop 5 is sealingly and slidably connected with the flexible connecting pipe 4.

[0032] In this case, as a preferred embodiment, the inner pipe 16 is filled with a shear thickening agent 11. In fact, the shear thickening agent 11 is composed of a dispersed phase and a dispersion medium, including shear thickening liquid and shear thickening gel, etc. Under normal circumstances, the shear thickening agent 11 is very soft, and once it encounters high-speed impact or extrusion, the shear thickening agent 11 becomes hard to digest external force. When the external force disappears, the shear thickening agent 11 will return to its original soft state, it has a strong ability to absorb impact, that is, the shear thickening agent 11 appears shear thinning phenomenon under low shear rate; under high shear rate, it appears shear thickening phenomenon, which can well protect the telescopic pipe 6 and provide buffering and energy absorption for various movements.

[0033] In addition, the flexible connecting pipe 4 is fixed with a second ring stop 8 near one end of the telescopic pipe 6, the second ring stop 8 can be limited by the first ring stop 5, thereby limiting the axial movement position of the first pipe body and the second pipe body.

[0034] As a preferred embodiment, a plurality of springs 10 are connected between the two second ring stops 8.

[0035] The spring 10 can limit the initial state of the two flexible connecting tubes 4, and it can also provide buffering energy absorption for various movements, just like shear thickening.

[0036] In this embodiment, the outer surfaces of both ends of the inner tube 16 are connected to the inner surface of the base tube 17 by a plurality of circumferentially distributed buffer rods 12.

[0037] In this embodiment, the outer surface of the middle part of the inner tube 16 is connected to the inner surface of the base tube 17 by a plurality of circumferentially distributed stabilizing mechanisms. The stabilizing mechanism includes a plurality of arrayed vertical bodies 13. Two adjacent vertical bodies 13 are connected by two symmetrically distributed horizontal frames 14. An X-shaped frame 15 is also connected between the two horizontal frames. The vertical bodies are filled with stabilizing pads.

[0038] In this embodiment, as Fig. 2 The outer surface of the regulating tube 3 is provided with a self-resetting assembly 9. The self-resetting assembly 9 includes a fixed ring 91, a support arm 92, and a slip ring 94. The fixed ring 91 is fixed to the outer surface of the regulating tube 3. Multiple support arms 92 are hinged to the circumference of the fixed ring 91. The other end of the support arm 92 is connected to a support block 93. A hinge arm 95 is hinged to the middle of the support arm 92. The hinge arm 95 is hinged to the slip ring 94. The slip ring 94 is slidably sleeved on the outer surface of the regulating tube 3 and is connected to the fixed ring 91 by a return spring.

[0039] The elastic action of the reset spring itself can drive the support arm 92 to expand outward, thereby maintaining the coaxiality between the first tube and the base tube 17 in the initial stage, and maintaining the coaxiality between the second tube and the base tube 17. This setting also enables, on the one hand, to provide buffer energy absorption for the radial movement or deflection of the first tube or the second tube, and on the other hand, to continuously guide it to reset.

[0040] As a preferred embodiment, the base pipe 17 is constructed in a hard stratum. In fact, the base pipe 17 should not only be constructed in a hard stratum, but its optimal location should be close to the location where a fault may occur.

[0041] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A ductile connection device to prevent pipe failure from fault locking stress release, characterized by: It is used for the toughness series connection of the first pipe body (1) and the second pipe body (2), which comprises an adjusting pipe (3), a toughness connecting pipe (4) and a base pipe (17), wherein the side close to each other of the first pipe body (1) and the second pipe body (2) is respectively communicated with an adjusting pipe (3), the side close to each other of the two adjusting pipes (3) is respectively communicated with a toughness connecting pipe (4), and the side close to each other of the two toughness connecting pipes (4) is commonly connected with an expansion pipe (6); Both of the two toughness connecting pipes (4) and the expansion pipe (6) are positioned in the same inner pipe (16) and can move radially, axially and deflect in the inner pipe (16); the inner pipe (16) is positioned in the base pipe (17) and can move radially in the base pipe (17); The inner side of both ends of the inner pipe (16) is fixed with a ring pad (7), the ring pad (7) has elasticity, and the inner side of the ring pad (7) is fixed with a first ring block (5); The inner surface of the first ring block (5) is sealingly and slidably connected with the toughness connecting pipe (4); The end close to the expansion pipe (6) of the toughness connecting pipe (4) is fixed with a second ring block (8), and the second ring block (8) can be limited by the first ring block (5); The inner pipe (16) is filled with a shear thickening agent (11); A plurality of springs (10) are connected between the two second ring blocks (8); The outer surface of both ends of the inner pipe (16) is connected with the inner surface of the base pipe (17) by a plurality of circumferentially distributed buffer rods (12); The outer surface of the middle part of the inner pipe (16) is connected with the inner surface of the base pipe (17) by a plurality of circumferentially distributed stabilizing mechanisms, the stabilizing mechanism comprises a plurality of arrayed longitudinal bodies (13), two adjacent longitudinal bodies (13) are connected by two symmetrically distributed horizontal frames (14) above and below, and X-shaped frames (15) are further connected between the two horizontal frames, and the longitudinal body is filled with a stabilizing pad; The outer surface of the adjusting pipe (3) is provided with a self-resetting assembly (9), the self-resetting assembly (9) comprises a fixed ring (91), a support arm (92) and a sliding ring (94), wherein the fixed ring (91) is fixed to the outer surface of the adjusting pipe (3), a plurality of support arms (92) are hinged on the circumference of the fixed ring (91), the other end of the support arm (92) is connected with a support block (93), the middle part of the support arm (92) is hinged with a hinge arm (95), the hinge arm (95) is hinged to the sliding ring (94), the sliding ring (94) is slidably sleeved on the outer surface of the adjusting pipe (3) and connected with the fixed ring (91) by a reset spring.

2. A ductile connection device to prevent pipe failure from fault- locking stress release according to claim 1, characterized in that: The base pipe (17) is constructed in a hard stratum.

Images