Connecting structure

Abstract

The utility model relates to the technical field of deepwater drilling, and discloses a connecting structure, a second connecting piece is sleeved on a first connecting piece, in order to enhance the connecting strength between the second connecting piece and the first connecting piece, a detachable locking piece is arranged on the second connecting piece, the locking piece comprises a locking part and an inserting part, the locking part is integrally in a sector ring shape, and the inserting part is arranged between the locking part and the first connecting piece. When the locking piece is located at the second position, the meshing teeth are clamped into the tooth grooves, the first connecting piece and the second connecting piece are connected through the locking piece, the contact face between the first connecting piece and the locking piece is a sector-ring-like contact face defined by the tooth faces of the meshing teeth, and the contact area of the first connecting piece and the locking piece is large. And the joint can bear larger load. The inserting part penetrates through the second connecting piece, the limiting piece can be connected with the inserting part and lock the locking piece at the second position, displacement of the locking piece after the first connecting piece and the second connecting piece are connected is avoided, and the connection reliability of the first connecting piece and the second connecting piece is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to deep water drilling technical field especially relates to a connecting structure. BACKGROUND

[0002] When carrying out marine oil and gas exploitation, in order to avoid seawater mixing into drilling fluid system to cause interference to the performance of drilling fluid, usually set up riser, for connecting underwater drilling appliance and water drilling device, and insulating internal drilling fluid and seawater, guaranteeing the safe operation of drilling operation under complex marine conditions. To avoid the loosening or disjointing between each riser section, usually set up the joint that can be mutually docked between adjacent pipe sections, to improve the overall sealing effect and structural integrity of the riser.

[0003] The conventional joint is mainly connected and fixed through the threaded connection mode, and the threaded surface processed on the joint has small stress area, and when the threaded surface is subjected to the complex conditions such as ocean current drag or vortex vibration in the ocean, the threaded surface is easily damaged by scouring, the connection effect between adjacent pipe sections is poor, and the related technology proposes a self-locking joint, the female joint is provided with a positioning pin capable of sliding up and down freely, the male joint is provided with a groove capable of clamping the positioning pin, and after clamping, the sliding outer sleeve is clamped and the positioning pin is covered and locked, the connection of the male joint and the female joint is enhanced.

[0004] In the self-locking joint, the positioning pin passes through the through hole outside the female joint and then clamps into the groove provided on the male joint, and the connection and fixing effect between the male joint and the female joint is only realized by the part of the spherical surface of the end of the positioning pin, when a large axial force or torque is borne, the stress of the spherical surface of the end of the positioning pin is highly concentrated, the structure of the positioning pin is easily damaged, and then the connection effect between the male joint and the female joint is affected. UTILITY MODEL CONTENTS

[0005] Based on the above problems, the purpose of the utility model is to provide a connecting structure, which can improve the compression strength of the connection between the first connecting piece and the second connecting piece, and improve the connection strength and connection stability of the two.

[0006] To achieve the above purpose, the following technical scheme is provided:

[0007] The utility model provides a connecting structure, which comprises:

[0008] The first connecting piece and the second connecting piece are sleeved on the first connecting piece.

[0009] The locking piece is detachably arranged on the second connecting piece, and the locking piece comprises a locking part and a plug-in part. The locking part is in the shape of a fan ring. Among the locking part and the first connecting piece, one is provided with engagement teeth, and the other is provided with a tooth groove capable of cooperating with the engagement teeth. The plug-in part is movably arranged in the second connecting piece. The locking piece has a first position and a second position. When the locking piece is in the first position, the locking part is in an uncoupling state with the first connecting piece. When the locking piece is in the second position, the engagement teeth are clamped into the tooth groove.

[0010] The limiting piece is movably arranged on the outer circumferential side of the second connecting piece. The limiting piece can be connected with the plug-in part and lock the locking piece in the second position.

[0011] Optionally, the limiting piece is slidingly arranged on the outer circumferential side of the second connecting piece. The limiting piece can be pressed against the plug-in part to make the engagement teeth clamped into the tooth groove.

[0012] Specifically, the limiting piece is provided with an inclined surface, which can be pressed against the plug-in part and drive the locking piece to switch from the first position to the second position.

[0013] Specifically, the limiting piece is provided with a stop part, and the second connecting piece is provided with a stop surface. When the limiting piece locks the locking piece in the second position, the stop part abuts against the stop surface.

[0014] Specifically, the plug-in part is provided with an unlocking hole. An unlocking tool can cooperate with the unlocking hole to drive the locking piece to switch between the first position and the second position.

[0015] Optionally, the connecting structure further comprises a resilient piece. The resilient piece is clamped between the locking part and the second connecting piece. When the locking piece is in the second position, the resilient piece is in an energy storage state. The locking piece can switch from the second position to the first position under the elastic force of the resilient piece.

[0016] Specifically, the second connecting piece is provided with a limiting hole capable of limiting the locking part from passing out of the second connecting piece.

[0017] Optionally, the limiting piece is rotatably arranged on the second connecting piece. When the limiting piece rotates in a first direction, the limiting piece can press against the outer end surface of the plug-in part and drive the locking piece to switch from the first position to the second position. When the limiting piece rotates in a second direction opposite to the first direction, the limiting piece can be disconnected from the plug-in part, so that the locking piece can switch from the second position to the first position.

[0018] Optionally, among the first connecting piece and the second connecting piece, one is provided with a plurality of limiting protrusions, and the other is provided with a limiting groove capable of cooperating with the limiting protrusions. When the plurality of limiting protrusions are clamped into the limiting groove, the engagement teeth and the tooth groove are opposite to each other. The locking piece can switch from the first position to the second position to lock the first connecting piece and the second connecting piece.

[0019] Optionally, the connecting structure further comprises a plurality of sealing members arranged at the connection between the first connecting member and the second connecting member.

[0020] The utility model discloses the beneficial effect that:

[0021] The utility model provides a connecting structure, the second connecting member is set on the first connecting member, for the connecting strength between both, the utility model discloses detachable locking piece is provided on the second connecting member, and the locking piece includes locking portion and plug -in portion, and the locking portion is whole and presents the fan ring, and locking portion and the first connecting member, one is provided with the meshing tooth, and the other is provided with the tooth groove that can cooperate with the meshing tooth, and when the locking piece is in the second position, the meshing tooth is clamped into the tooth groove, and the first connecting member and the second connecting member are connected through the locking piece, and the contact surface between the first connecting member and the locking piece is the contact surface of the fan ring that the tooth surface of meshing tooth surrounds, and the contact area of both is larger, and the connecting place can bear larger axial force or torque, and the connecting stability of the first connecting member and the second connecting member also has the promotion accordingly. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment of the utility model will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the contents of the embodiment of the utility model and these drawings without paying the creative labor.

[0023] Figure 1 It is the explosion map of the connecting structure provided by the embodiment of the utility model;

[0024] Figure 2 It is the structure schematic view of the locking piece provided by the embodiment of the utility model;

[0025] Figure 3 It is the cross section view of the locking piece provided by the embodiment of the utility model;

[0026] Figure 4 It is the structure schematic view of the second connecting member provided by the embodiment of the utility model;

[0027] Figure 5 It is the structure schematic view of the connecting structure when the locking piece is in the first position provided by the embodiment of the utility model;

[0028] Figure 6is a structure diagram of the connecting structure when the locking piece is in the second position.

[0029] In the figure:

[0030] 1, first connecting piece; 11, tooth groove; 12, limiting protrusion; 2, second connecting piece; 21, limiting hole; 22, limiting groove; 3, locking piece; 31, locking part; 311, meshing tooth; 32, plug-in part; 321, unlocking hole; 4, limiting piece; 41, stop part; 5, sealing piece. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model embodiment will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner" and "outer" is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0033] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] As Figures 1 to 6The utility model provides a connecting structure, including first connecting piece 1, the second connecting piece 2 of setting in first connecting piece 1, locking piece 3 and spacing piece 4, wherein, locking piece 3 includes locking portion 31 and inserting portion 32, locking portion 31 is fan ring shape, locking portion 31 and the both of first connecting piece 1, one is provided with meshing tooth 311, the other is provided with the tooth groove 11 that can cooperate with meshing tooth 311, inserting portion 32 is movably provided in second connecting piece 2, locking piece 3 has first position and second position, when locking piece 3 is in first position, locking portion 31 and first connecting piece 1 are in the state of not clamping, to adjust the position of meshing tooth 311 compared with tooth groove 11 in time.

[0035] Locking piece 3 is detachably provided in second connecting piece 2, when needing to connect first connecting piece 1 and second connecting piece 2 closely, can move locking piece 3 from first position to second position, so that meshing tooth 311 is clamped into tooth groove 11, and when needing to disconnect the connection between first connecting piece 1 and second connecting piece 2, can move locking piece 3 from second position to first position, and then locking piece 3 is taken out from second connecting piece 2, the dismounting of locking piece 3 is completed, and the operation of transporting, storing or maintaining of the three is facilitated. Figure 3 Locking piece 3 is detachably provided in second connecting piece 2, when needing to connect first connecting piece 1 and second connecting piece 2 closely, can move locking piece 3 from first position to second position, so that meshing tooth 311 is clamped into tooth groove 11, and when needing to disconnect the connection between first connecting piece 1 and second connecting piece 2, can move locking piece 3 from second position to first position, and then locking piece 3 is taken out from second connecting piece 2, the dismounting of locking piece 3 is completed, and the operation of transporting, storing or maintaining of the three is facilitated.

[0036] To avoid displacement of the locking piece 3 after the first connecting piece 1 is connected with the second connecting piece 2, a limiting piece 4 is movably arranged on the outer periphery of the second connecting piece 2, and the limiting piece 4 can be connected with the plug-in part 32 and lock the locking piece 3 in the second position, thereby improving the connection reliability of the first connecting piece 1 and the second connecting piece 2. In an embodiment, the limiting piece 4 is slidably arranged on the outer periphery of the second connecting piece 2, and during the sliding process, the limiting piece 4 can be pressed against the plug-in part 32, so that the meshing teeth 311 are clamped into the tooth groove 11, thereby realizing the connection of the first connecting piece 1 and the second connecting piece 2. When it is necessary to disassemble the connection structure, the limiting piece 4 can be slid in the opposite direction, so that the locking piece 3 is switched from the second position back to the first position. The limiting piece 4 is slidably arranged, which is beneficial to the convenience of installation and disassembly, and the installation and disassembly process can be realized without additional operation tools, and the operation difficulty is relatively small.

[0037] A stop portion 41 can be arranged on the limiting piece 4, and a corresponding stop surface is arranged on the second connecting piece 2. When the limiting piece 4 locks the locking piece 3 in the second position, the stop portion 41 abuts against the stop surface, so that the limiting piece 4 can continuously press against the plug-in part 32, thereby limiting the radial displacement of the locking piece 3, and the first connecting piece 1 and the second connecting piece 2 can be locked by the locking piece 3. In addition, to realize the pressing action of the limiting piece 4 on the plug-in part 32 during the sliding process, an inclined surface can be arranged on the limiting piece 4. During the sliding of the limiting piece 4, the inclined surface can press against the outer end surface of the plug-in part 32 and drive the locking piece 3 to switch from the first position to the second position. The limiting piece 4 provided with the inclined surface can not only limit the locking piece 3, but also drive the locking piece 3, thereby saving the time for adjusting the position of the locking piece 3 by using additional operation tools and effectively improving the connection efficiency.

[0038] To facilitate the switching of the locking piece 3 between the first position and the second position, a resilient piece can also be arranged between the locking part 31 and the second connecting piece 2. When the locking piece 3 is in the first position, the resilient piece is in a natural state of maintaining its inherent shape. The application of external force to the locking piece 3 can cause the resilient piece to elastically deform and change from the natural state to an energy storage state. When the external force is removed, the locking piece 3 can be automatically switched from the second position to the first position under the elastic force of the resilient piece. The use of the resilient piece can automatically switch the locking piece 3 from the second position to the first position, thereby simplifying the position adjustment process of the locking piece 3 and reducing the difficulty of switching the locking piece 3 between the first position and the second position. The resilient piece can be a spring. Figure 4 As shown in FIG. 8, to limit the locking part 31 from being pulled out of the second connecting piece 2 during the initial installation of the locking piece 3, a limiting hole 21 can be formed in the second connecting piece 2, and the hole diameter of the limiting hole 21 is smaller than the cross-sectional size of the locking part 31.

[0039] In other embodiments, the limiting piece 4 can also be rotationally arranged on the second connecting piece 2. The limiting piece 4 is provided with guide protrusions at intervals, and the adjacent guide protrusions are provided with an avoiding slot. When the locking piece 3 is in the first position, rotating the limiting piece 4 in the first direction can continuously apply force to the external end face of the plug-in part 32 by the guide protrusions, thereby driving the locking piece 3 to gradually move from the first position to the second position. When the meshing teeth 311 are engaged with the tooth groove 11, the rotation of the limiting piece 4 can be stopped to lock the locking piece 3 in the second position, thereby completing the connection of the first connecting piece 1 and the second connecting piece 2. When disassembling the first connecting piece 1 and the second connecting piece 2, the limiting piece 4 can be rotated in the second direction opposite to the first direction until the guide protrusions are not in contact with the plug-in part 32 and the plug-in part 32 is opposite to the avoiding slot, and then the rotation of the limiting piece 4 is stopped. At this time, the limiting piece 4 is disconnected with the plug-in part 32, and the locking piece 3 can be switched from the second position to the first position by using an unlocking tool. In order to simplify the position switching process of the locking piece 3, a resilient piece can also be arranged between the locking part 31 and the second connecting piece 2. When the guide protrusions press against the plug-in part 32, the movement of the locking part 31 can pull the resilient piece to make the resilient piece in a stretched state. When the limiting piece 4 is rotated to the position that the guide protrusions are not in contact with the plug-in part 32 and the plug-in part 32 is opposite to the avoiding slot, the locking piece 3 can automatically switch from the second position to the first position by the reset characteristics of the resilient piece.

[0040] In order to enhance the connection strength of the first connecting piece 1 and the second connecting piece 2, in addition to the locking piece 3, a plurality of limiting protrusions 12 can be arranged on the outer surface of one of the first connecting piece 1 and the second connecting piece 2, and a limiting groove 22 capable of cooperating with the limiting protrusions 12 can be arranged on the outer surface of the other. When the plurality of limiting protrusions 12 are clamped into the limiting groove 22, the meshing teeth 311 and the tooth groove 11 are opposite. At this time, the locking piece 3 can be switched from the first position to the second position to lock the first connecting piece 1 and the second connecting piece 2 by the locking piece 3. The plurality of limiting protrusions 12 and the limiting groove 22 can accurately position the locking piece 3. When the limiting protrusions 12 are clamped into the limiting groove 22, the meshing teeth 311 and the tooth groove 11 can be opposite. Correspondingly, the locking piece 3 can be locked. The limiting protrusions 12 clamped into the limiting groove 22 can also avoid the relative rotation between the first connecting piece 1 and the second connecting piece 2. In addition, when the connection structure is applied to deep water drilling or other fluid flow fields, in order to improve the overall sealing performance of the connection structure and avoid the communication between the internal fluid of the first connecting piece 1 and the second connecting piece 2 and the external environment, a plurality of sealing pieces 5 can be arranged at the connection of the first connecting piece 1 and the second connecting piece 2. The sealing piece 5 can be a sealing ring or a sealing strip.

[0041] In a specific embodiment, when the first connecting piece 1 and the second connecting piece 2 need to be connected, first, the inner edges of the two are aligned, then the locking piece 3 is inserted into the second connecting piece 2 until the locking piece 3 reaches the first position, at this time, the fan ring surface of the locking part 31 tightly abuts the inner wall surface of the second connecting piece 2, and the insertion part 32 partially penetrates out of the outer end surface of the second connecting piece 2, so as to realize the preliminary fixation of the locking piece 3 and the second connecting piece 2, then the second connecting piece 2 with the locking piece 3 is moved until the limiting protrusion 12 is clamped into the limiting groove 22, at this time, the meshing teeth 311 are opposite to the tooth groove 11, the locking hole 321 is connected by using the unlocking tool, the locking piece 3 is moved to the second position, that is, the meshing teeth 311 are clamped with the tooth groove 11, the preliminary connection of the first connecting piece 1 and the second connecting piece 2 is completed, then the limiting piece 4 arranged on the outer circumferential side of the second connecting piece 2 is slid until the stop portion 41 clamps the outer edge of the second connecting piece 2, and the limiting piece 4 is pressed against the insertion part 32, so as to realize the limiting of the locking piece 3 and the fixation of the limiting piece 4, thereby realizing the close connection of the first connecting piece 1 and the second connecting piece 2.

[0042] It should be noted that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A connection structure, characterized by, include: A first connector (1) and a second connector (2) sleeved on the first connector (1); A locking member (3) is detachably disposed on the second connecting member (2). The locking member (3) includes a locking part (31) and a plug-in part (32). The locking part (31) is fan-shaped. One of the locking part (31) and the first connecting member (1) is provided with a meshing tooth (311), and the other is provided with a tooth groove (11) that can cooperate with the meshing tooth (311). The plug-in part (32) is movably disposed on the second connecting member (2). The locking member (3) has a first position and a second position. When the locking member (3) is in the first position, the locking part (31) and the first connecting member (1) are not engaged. When the locking member (3) is in the second position, the meshing tooth (311) is engaged with the tooth groove (11). The limiting member (4) is movably disposed on the outer periphery of the second connector (2). The limiting member (4) can connect with the plug-in part (32) and lock the locking member (3) in the second position.

2. The connection structure according to claim 1, characterized in that The limiting member (4) is slidably disposed on the outer periphery of the second connector (2), and the limiting member (4) can press against the insertion part (32) so that the meshing tooth (311) is engaged in the tooth groove (11).

3. The connection structure according to claim 2, characterized in that The limiting member (4) is provided with an inclined surface, which can press against the insertion part (32) and drive the locking member (3) to switch from the first position to the second position.

4. The connection structure according to claim 2, characterized by The limiting member (4) is provided with a stop part (41), and the second connecting member (2) is provided with a stop surface. When the limiting member (4) locks the locking member (3) in the second position, the stop part (41) abuts against the stop surface.

5. The connection structure according to claim 1, wherein The plug part (32) has an unlocking hole (321), and the unlocking tool can cooperate with the unlocking hole (321) to drive the locking member (3) to switch between the first position and the second position.

6. The connection structure according to claim 1, wherein The connection structure also includes an elastic element, which is sandwiched between the locking part (31) and the second connecting member (2). When the locking member (3) is in the second position, the elastic element is in an energy storage state. The locking member (3) can switch from the second position to the first position under the elastic force of the elastic element.

7. The connection structure according to claim 1, wherein The second connector (2) is provided with a limiting hole (21), which can restrict the locking part (31) from passing through the second connector (2).

8. The connection structure according to claim 1, wherein The limiting piece (4) is rotationally arranged on the second connecting piece (2), when the limiting piece (4) rotates along a first direction, the limiting piece (4) can press against the external end surface of the plug-in part (32) and drive the locking piece (3) to switch from the first position to the second position; when the limiting piece (4) rotates along a second direction opposite to the first direction, the limiting piece (4) can be disconnected with the plug-in part (32), so that the locking piece (3) can switch from the second position to the first position.

9. The connection structure according to claim 1, wherein Among the first connecting piece (1) and the second connecting piece (2), one is provided with a plurality of limiting protrusions (12), and the other is provided with a limiting groove (22) capable of cooperating with the limiting protrusions (12), when a plurality of limiting protrusions (12) are clamped into the limiting groove (22), the meshing teeth (311) and the tooth groove (11) are opposite, and the locking piece (3) can switch from the first position to the second position to lock the first connecting piece (1) and the second connecting piece (2).

10. The connection structure according to claim 1, wherein The connecting structure further comprises a plurality of sealing pieces (5), and a plurality of sealing pieces (5) are arranged at the connection between the first connecting piece (1) and the second connecting piece (2).

Images