CN210738492U - Tenon-and-mortise connection type bending limiter without transmitting torsional shear stress - Google Patents
Tenon-and-mortise connection type bending limiter without transmitting torsional shear stress Download PDFInfo
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- CN210738492U CN210738492U CN201921801018.6U CN201921801018U CN210738492U CN 210738492 U CN210738492 U CN 210738492U CN 201921801018 U CN201921801018 U CN 201921801018U CN 210738492 U CN210738492 U CN 210738492U
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- tenon
- mortise
- limiter
- female head
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Abstract
The utility model provides a do not transmit crooked limiter of mortise-tenon joint formula of twisting shear stress, belongs to the ocean engineering field, is applicable to the flexible tube and cable in ocean, includes n festival limit bent ware single knot structures, and every limit bent ware single knot structure includes two the same limiter halfbody structures of structure. This limit curved ware adopts unsmooth tenon fourth of the twelve earthly branches structure that combines to connect, and tenon fourth of the twelve earthly branches structure evenly distributed is in female head section, avoids using the corrosion failure that the bolt leads to in a large number, improves structural reliability, and the connection form is simple reasonable and has the flexibility, improves the installation effectiveness, does not influence the compliance of cable in addition, can wrench movement between each limit curved ware, and the torsional shear stress of actual operating mode is not transmitted, makes the functional stability of limit curved ware in practical application more excellent. The functional stability in practical application is more excellent.
Description
Technical Field
The utility model belongs to the ocean engineering field relates to a crooked limiter of high performance to flexible pipe cable, is applicable to the bending protection of flexible pipe cable in ocean.
Background
Since the wide use of petroleum and natural gas, oil and gas resources on land have been increasingly depleted by development to this day. Humans are gradually diverting the main place of oil and gas production from land to the ocean. As a life line for ocean oil and gas exploitation, the protection of a flexible submarine cable and a flexible pipeline (hereinafter referred to as a flexible pipe cable) is an important link in the whole oil and gas exploitation process. Preventing excessive bending of the flexible umbilical is a major aspect of protecting it.
The bending limiter is used for preventing the marine flexible pipe cable from being bent excessively, and the bending limiter is arranged at a position where the flexible pipe cable is possibly bent excessively so as to increase the bending rigidity of the section to protect the flexible pipe cable from being bent. The basic structure of the bend limiter is a variable-diameter semi-circumference cylindrical component which can be divided into two sections according to the geometric shape, namely a male head section and a neck section at the front end and a female head section at the tail end; and because the male head and the female head section are connected, the outer diameter of the bend limiter needs to be changed along the axial direction, the general bend limiter overall structure is formed by assembling the same bolt holes reserved in the normal direction of the assembly surface by the bend limiter monomer, and the whole bend limiter main body is connected only by means of the matching between the male head and the female head section and the radial connection of the bolts in the assembly process. Along with the continuous development of oil and gas exploitation to the deep and open sea, the in-place service environment of the flexible pipe cable is more and more severe, the allowable working hours for installation are less and less, and correspondingly, higher requirements are provided for the bearing capacity of the bend limiter and the convenience degree during installation. The bolt connection mode that traditional limit curved ware adopted not only the bolt position easily takes place destruction such as fatigue and installs loaded down with trivial details. It adopts the cross mortise-tenon joint mode of cross that it adopted to bend under current quick-connect does not have bolt, has restricted the axial rotation of limit bender combination, has destroyed the compliance of limit bender, considers the limit bender and receives the torsional moment influence in the practical application operating mode, and the transmission twists reverse shear stress between the structure, leads to the tenon fourth of the twelve earthly branches structure of public head department to take place destruction easily, consequently has certain limitation in practical application.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a do not transmit crooked limiter of mortise-tenon joint formula of twisting shear stress. This limit curved ware adopts unsmooth tenon fourth of the twelve earthly branches structure that combines to connect, and tenon fourth of the twelve earthly branches structure only distributes at female head section, not only makes things convenient for pouring processing, and easy installation improves junction fatigue strength, does not influence the compliance of pipe cable moreover, can wrench movement between each limit curved ware, and the shearing stress that the operating mode caused is twistd reverse in the not transmission, and the reliability that makes limit curved ware in practical application is more excellent.
In order to achieve the above object, the utility model discloses a technical scheme be:
the utility model provides a do not transmit crooked limiter of mortise-tenon joint type of twisting shear stress, crooked limiter of mortise-tenon joint type passes through mortise-tenon joint, including n festival limit curved ware main part, n festival limit curved ware main part includes 2n structure identical limit curved ware monomers, and every festival limit curved ware main part is formed by two identical limit curved ware monomers connection, n be positive integer, concrete value is decided according to actual demand.
Each bending limiter monomer is of a semi-circumference cylindrical structure and comprises three parts, namely a male head at the front end, a middle neck section 3 and a female head section 4 at the tail end, wherein the three parts are of an integrally formed structure. One end of each bending limiter monomer in the direction of the normal of the assembling surface of the female head section 4 is provided with a tenon structure 6, and the tenon structure 6 is a convex structure; the other end is equipped with fourth of twelve earthly branches structure 7, and fourth of twelve earthly branches structure 7 is sunk structure, is equipped with public head shoulder 5 on every single public head peripheral surface of limit curved ware, and female head shoulder 9 is equipped with to female head section 4 rear end.
The tenon structure 6 and the mortise structure 7 of the two bending limiter monomers are mutually matched to form a tenon-and-mortise structure, and a whole section of bending limiter is formed by means of matching assembly between the male head and the female head sections without bolt connection or other connecting rings. The male head, the neck section 3 and the female head section 4 form an integral structure with a reducing communicating inner cavity inside in the assembled whole bend limiter main body, the integral structure is used for placing a pipe cable and protecting the pipe cable, and two female head shoulders 9 form a shoulder cavity after assembly. The tenon-and-mortise structures are the same in thickness and number, and the thickness is 1/4-1/2 of the wall thickness of the female head cavity section; the tenon-and-mortise structure can adopt a variable cross-section type and trapezoidal structure, so that the root of the tenon structure is effectively prevented from being broken and damaged; the tenon structure 6 and the mortise structure 7 form a certain angle, so that the sliding and locking are convenient, and the installation efficiency is improved; generally, two to three mortise and tenon joints are adopted, so that the installation is not too much to cause complexity, and the structure is not easy to be unstable due to too little mortise and tenon joint.
The whole section of bend limiter main part inside include three coaxial but the different cavity of internal diameter, female head section 4 from the public head of front end to rear end is cavity passageway 8, female head cavity 10, shoulder cavity 11 in proper order, three cavity link up each other, the cavity is arranged from small to big according to the internal diameter and is cavity passageway 8, shoulder cavity 11, female head cavity 10.
The hollow channel 8 penetrates through the male head and the neck section 3 and extends to the female head section 4 to reserve a placing space for the protected pipe cable. The hollow channel 8 is a circular truncated cone at the male head, and is a cylinder at the neck section 3 and the female head section 4.
The inner diameter of the shoulder cavity is larger than the outer diameter of the neck section 3 and smaller than the outer diameter of the male head, a space is reserved for placing a pipe cable, the shoulder cavity is also used for providing the relative rotation amount between the reserved bend limiter sections, and the inner cavity is mainly used for being matched with the outer contours of the male head and the neck to form a locking structure. The shoulder cavity is provided with a chamfer.
Furthermore, the angle range of the acute angle between the tenon structure and the mortise structure and between the tenon structure and the assembling surface is 20-60 degrees, and the tenon structure and the mortise structure do not have an inclination angle after being assembled, so that a complete and smooth circumferential surface is formed.
In the assembly process, a male head of a first bending limiter monomer is inserted into a female head section 4 of a previous bending limiter monomer in sequence, a male head shoulder part 5 on the periphery of the first male head is clamped in a female head cavity 10, and after the bottom bending limiter monomers are matched in sequence, the marine flexible pipe cable is placed; and then the bending limiter monomer on the upper part slides along the direction parallel to the matching surface and vertical to the axis to enable the tenon-and-mortise structures to be mutually matched, and the assembled bending limiter monomer is rotated by a certain angle, so that the assembly can be completed. When the flexible pipe cable is under the action of external force, the male head and the female head section at the contact part are locked mutually, so that the flexible pipe cable can be prevented from generating large bending deformation in the use process, and the flexible pipe cable is prevented from being excessively bent.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the bolt is not needed for fastening, so that the corrosion failure of the metal bolt is avoided, and the structural reliability is improved.
(2) The installation mode of the sliding installation and the mutual locking of the tenon-and-mortise structures effectively improves the installation efficiency.
(3) The connection form of the tenon-and-mortise structure is simple and reasonable, has certain flexibility, and can reduce the manufacturing cost.
(4) The compliance of the pipe cable is not damaged, the torsional shear stress is not transmitted, and the integral structure is prevented from being damaged by torsion.
Drawings
Fig. 1 is the novel crooked limiter single section assembly schematic diagram of mortise-tenon joint formula flexible pipe cable.
Fig. 2 is an assembly view of a plurality of sections of the novel bending limiter of the tenon-and-mortise connection type flexible pipe cable.
Fig. 3 is an assembly view of a plurality of sections of the novel bending limiter for the tenon-and-mortise connection type flexible pipe cable.
In the figure: 1, a bending limiter monomer A; 2, a bending limiter monomer B; 3 a neck section; 4, a female head section; 5 male shoulder; 6, a tenon structure; a mortise structure; 8, a hollow channel; 9 female shoulder; 10 female cavity; 11 shoulder cavity.
Detailed Description
The invention is described below with reference to the accompanying examples, but not intended to limit the scope of the invention.
Fig. 1, fig. 2 and fig. 3 exemplarily show the overall structure of the novel tenon-and-mortise connection type flexible pipe cable bending limiter described in the present invention and the connection method thereof, and those skilled in the art can completely understand that any plurality of bending limiters can be sequentially connected in practical use according to the method shown in fig. 1, fig. 2 and fig. 3.
Fig. 1 exemplarily depicts a connection mode between a single bend limiter A1 and a single bend limiter B2; after the tenon structures 6 and the mortise structures 7 of the two monomers are in butt joint, the tenon and the mortise are matched with each other by sliding along the direction parallel to the matching surface and perpendicular to the axis, and then the installation can be completed.
Fig. 2 exemplarily illustrates a connection relationship of the first joint limiter body and the second joint limiter body, and the first joint limiter body and the second joint limiter body are identical in structure. One end of the female head section of each bending limiter is provided with a tenon structure 6, the other end of the female head section is provided with a mortise structure 7, the wall thickness of the female head cavity section is 25cm, and the mortise structure is 10 cm; the cross section is a rectangular cross section, so that the root of the tenon structure is effectively prevented from being broken and damaged; the acute angle between the tenon and the assembling surface is 48 degrees, and the tenon-and-mortise structures have no inclination angle after being assembled, thereby forming a complete and smooth circumferential surface. Slippage after installation is avoided; two mortise and tenon joints are adopted, so that the installation is not too much to cause complexity, and the structure is not easy to be unstable due to too little installation. The tenon fourth of twelve earthly branches structure can effectually improve the installation effectiveness of limit curved ware, avoids metal bolt to take place to corrode and destroys. When in connection, the male head and neck section 3 of the second bending limiter unit is inserted into the female head section 4 of the first bending limiter unit, and the shoulder 5 at the periphery of the male head and neck of the second bending limiter unit is clamped in the cavity 10 by the female head shoulder 9 of the first bending limiter unit.
Fig. 3 is an exemplary multi-section assembly mode of the novel tenon-and-mortise connection type limiter for the marine flexible pipe cable, during assembly, two sections of the bending limiter monomers at the bottom are firstly matched according to the mode shown in fig. 2 to form a hollow channel 8, the marine flexible pipe cable is placed to enable the marine flexible pipe cable to pass through the hollow channel 8, and then the upper bending limiter is extended to be parallel to a matching surface and to slide in the direction perpendicular to the axis to enable tenon-and-mortise joints to be matched with each other, so that the assembly can be completed. When the flexible pipe cable is subjected to bending deformation under the action of external force to a certain degree, the male head and the female head section at the contact part are locked mutually, so that the flexible pipe cable can be prevented from generating larger bending deformation in the use process, and the flexible pipe cable is prevented from being excessively bent.
Furthermore, the tenon-and-mortise structures of the single bending limiter are uniformly distributed on the female head section 4.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
The above-mentioned embodiments only represent the embodiments of the present invention, but can not be understood as the limitation of the scope of the present invention, and it should be noted that, for those skilled in the art, a plurality of variations and improvements can be made without departing from the concept of the present invention, and all of them belong to the protection scope of the present invention.
Claims (3)
1. The tenon-and-mortise connection type bending limiter without transmitting torsional shear stress is characterized in that the tenon-and-mortise connection type bending limiter is connected through a tenon-and-mortise joint and comprises n sections of bending limiter main bodies, and each n section of bending limiter main bodies comprises 2n bending limiter single bodies with the same structure;
each bending limiter monomer is of a reducing semi-circular cylindrical structure and comprises a male head at the front end, a middle neck section (3) and a female head section (4) at the tail end, and the three parts are of an integrally formed structure; one end of each bending limiter monomer in the female head section (4) along the normal direction of the assembly surface is provided with a convex tenon structure (6), the other end of each bending limiter monomer is provided with a concave mortise structure (7), and the thickness and the number of the mortise structures are the same; a male head shoulder (5) is arranged on the outer peripheral surface of the male head of each bending limiter monomer, and a female head shoulder (9) is arranged at the rear end of the female head section (4);
the tenon structures (6) and the mortise structures (7) of the two bending limiter monomers are mutually matched to form a tenon-and-mortise structure, and a whole section of bending limiter is formed by matching and assembling the male head and the female head sections without bolt connection or other connecting rings; the assembled whole bend limiter main body is characterized in that a male head, a neck section (3) and a female head section (4) form an integral structure with a reducing communicating inner cavity inside, the integral structure comprises three coaxial cavities with different inner diameters, the female head section (4) from the male head at the front end to the female head section at the rear end is sequentially provided with a hollow channel (8), a female head cavity (10) and a shoulder cavity (11), the three cavities are communicated with each other, and the cavities are arranged into the hollow channel (8), the shoulder cavity (11) and the female head cavity (10) from small to large according to the inner diameters and used for placing a pipe cable and protecting the pipe cable;
in the assembling process, a male head of a first bottom bend limiter monomer is inserted into a female head section (4) of a previous bend limiter monomer, a male head shoulder (5) on the periphery of the first male head is clamped in a female head cavity (10), and after the bottom bend limiter monomers are matched in sequence, an ocean flexible pipe cable is placed; then the bending limiter monomer at the upper part slides along the direction parallel to the matching surface and vertical to the axis to enable the tenon-and-mortise structures to be mutually matched, and the assembled bending limiter monomer is rotated by a certain angle to complete the assembly; when the flexible pipe cable is under the action of external force, the male head and the female head section at the contact part are locked mutually, so that the flexible pipe cable is prevented from being bent excessively.
2. The bending limiter of mortise and tenon joint type for transmitting torsional shear stress according to claim 1, wherein the thickness of the mortise and tenon joint structure (7) and the tenon joint structure (6) is 1/4-1/2 of the wall thickness of the female cavity section.
3. The bending limiter of mortise and tenon joint type for transmitting torsional shear stress according to claim 1, wherein the acute angle between the tenon structure (6) and the mortise structure (7) and the assembling surface is in the range of 20-60 degrees, and the tenon and mortise structure has no inclination angle after the tenon and mortise structures are assembled to form a complete and smooth circumferential surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921801018.6U CN210738492U (en) | 2019-10-25 | 2019-10-25 | Tenon-and-mortise connection type bending limiter without transmitting torsional shear stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921801018.6U CN210738492U (en) | 2019-10-25 | 2019-10-25 | Tenon-and-mortise connection type bending limiter without transmitting torsional shear stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210738492U true CN210738492U (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921801018.6U Expired - Fee Related CN210738492U (en) | 2019-10-25 | 2019-10-25 | Tenon-and-mortise connection type bending limiter without transmitting torsional shear stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210738492U (en) |
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2019
- 2019-10-25 CN CN201921801018.6U patent/CN210738492U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200612 Termination date: 20201025 |