CN107084281A - A kind of seabed flexible pipe laying fixing device - Google Patents

Abstract

The present invention discloses a kind of seabed flexible pipe laying fixing device, including solid ground device and pipeline stopping means, admittedly device insertion soil in, keep firm using the frictional force of soil, absorption affinity, bottom bearing, the negative pressure of device and internal weights, pipeline is fixed through pipeline stopping means by ring；Admittedly the device is hollow bottomless cylindrical structure, including upper casing and side wall；The centre of upper casing is provided with a slot, has been arranged circumferentially to be connected with pipeline stopping means, around slot in counterweight tank and exhaust hole, counterweight tank and exhaust hole and has been respectively arranged with balancing weight and exhaust apparatus；Admittedly the bottom of device side wall be provided with point finning, contribute to being initially inserted into for solid ground device, and pawl is provided with solid ground device inwall, to increase soil frictional force when solid ground device is extracted.Apparatus structure of the present invention is ingenious in design, flexibility is high, has a wide range of application, and convenient install improves the efficiency of pipe laying with dismounting, effective cost for reducing installation and transportation and reclaiming.

Description

A kind of seabed flexible pipe laying fixing device

Technical field

The present invention relates to submarine pipeline relevant equipment technical field, specifically related to a kind of seabed flexible pipe laying is filled with fixed Put.

Background technology

Seabed general enhancement layer, the high-density polyethylene by windings such as glass fibre, carbon fiber, aramid fibers of flexible pipe Jacket layer and inner liner that alkene, polypropylene etc. are made etc., which are bonded, to be constituted, and also has what is be composited by metal level and non-metallic layer Non-adhesive pipeline.Due to constituent material, the density of composite strengthening pipeline on the whole is often little with seawater difference, Therefore need to take specific process to make pipeline sink to seabed and ensure that it lays rear stability.

Seabed flexible pipe（Hereinafter referred to as sea is managed）Sinking is to behind seabed, and wave, ocean current and neighbouring anchorage regardless can all endanger And to the safety and stability of extra large pipe.It is embedded frequently with ditching for the pipe laying of flat tube section, shallow water area, but work as and run into Sea bed with more ragstone, ditching is embedded become it is extremely difficult, be at this moment accomplished by that sea bed surface will be moved on pipeline, Pipeline is covered by laying lithotripsy method, although the method cost of this jackstone is low by operating depth and the shadow for toppling over accuracy Ring notable, its counterweight pressure distribution is simultaneously unequal, for a long time ballast effect of the lower rubble by the scouring part conduit region such as wave current It can fail, in addition, the axial displacement of pipeline is limited in embedded or part balancing weight, and pipeline is in the transition of two kinds of laying methods Transitional region of the region also or from pipe laying to standpipe, pipeline is extremely unstable under axial force and circumferential force collective effect, easily Cause the fatigue of surface abrasion local buckling or other forms.

At deep-sea, because the embedded inconvenient cost of ditching is too high and smaller by man's activity, flexible pipe, which is mainly used, matches somebody with somebody The modes such as weight pad, stable briquetting, balancing weight.For counterweight pressure pad mode, typically also it is served only for protecting local pipe, increases Plus the laminating degree of local pipe and sea bed, it is a wide range of unrealistic using pressure pad；It is steady that stable briquetting can be divided into hinge type by form Level pressure block and the stable briquetting of the shape of a saddle, this counterweight mode must be realized to be smoothed to seabed, otherwise easily with swelling table Face forms the stress raisers that extruding causes flexible pipe；Balancing weight is generally constituted by upper and lower two pieces, and first choice is symmetrical with tube hub Design, be then bolted, can make the different shapes such as circle, rectangle, star, in actual laying, it is necessary to match somebody with somebody The many gross weights of pouring weight quantity are too big, and flexible pipe generally requires the support of stinger and stretcher, therefore counterweight when mounted Method has inconvenience in actual installation.At deep-sea, limited by Detection Techniques, it is impossible to depict submarine laying region completely Topography and geomorphology, while be also impossible on laying-out ensure landform it is fully horizontal, certainly exist more complicated morphologic region, And it is too big to transform deep-sea landform cost, also therefore, the placement of balancing weight is a test, it is ensured that keeping flat for balancing weight is stranded very much Difficulty, otherwise the long-term shear stress fatigue behaviour for balancing weight locking bolt is a test.

In addition, above all of counterweight mode, which renews and discarded on its maintenance, recycles and reuses all relative difficulties, into This very high, the problem of existing in face of counterweight paving mode, towards deeper application waters and more complicated geographical conditions, it is necessary to one New flexible pipe laying apparatus is planted, problem above can not only be overcome, and good firm performance can be kept.

The content of the invention

The purpose of the present invention is to propose to a kind of seabed flexible pipe laying fixing device, most of flexible pipe laying is suitable for It is required that, either level also or the seabed with angle of inclination can ensure device grab ground steadiness, for landform Adaptability it is very good, and install it is easy to implement.

The present invention is realized using following technical scheme：A kind of seabed flexible pipe laying fixing device, including it is solid In ground device and the pipeline stopping means being connected with solid ground device, the insertion of device admittedly the soil, soil friction, sea are utilized Water inside and outside differential pressure and internal weights keep firm, and pipeline is fixed through pipeline stopping means by ring；It is described during device is admittedly Empty bottomless cylindrical structure, including upper casing and side wall, its upper casing are thicker；The centre of upper casing is provided with a slot, with pipeline Stopping means is connected, and has been arranged circumferentially around slot in counterweight tank and exhaust hole, the counterweight tank and exhaust hole respectively It is provided with balancing weight and exhaust apparatus；The shape of the balancing weight is consistent with counterweight tank bottom profile, and its height is less than and matched somebody with somebody Baking soda, the actual weight and shape of balancing weight can be determined according to actual needs；Admittedly the bottom of the device side wall is sharpening Portion, contributes to being initially inserted into solid ground device, and is provided with pawl on solid ground device madial wall, is pulled out with increasing solid ground device Soil frictional force when going out.

Further, the pipeline stopping means includes the pipe sleeve shielded to pipeline and matched with the slot Plug, the upper pipe collar and lower pipe collar that pipe sleeve is fixed are arranged with outside pipe sleeve, upper pipe collar and lower pipe collar are solid by bolt Connect calmly, and the plug is connected with lower pipe collar, pipeline passes through upper and lower pipe collar banding pipe sleeve, plug insertion by pipe sleeve In slot, and fixed by a retaining ring, device is connected by pipeline stopping means and admittedly.

Further, the slot is turbination structure, corresponding, and on solid ground, the inside of device has an inverted cone Body, equally, the plug are turbination structure, to match with slot.

Further, the exhaust apparatus includes being provided with vent board, vent board at the top of an outer barrel, outer barrel and is provided with It is provided with sealed compartment and lower sealed compartment in several gas ports, outer barrel, the bottom of upper sealed compartment and lower sealed compartment has inverted cone Shape valve port, and it is respectively arranged with upper sealed compartment and lower sealed compartment the upper sealing for realizing sealing or circulation that can locally move up and down Block and lower sealing block, and be provided with below vent board and to stretch into sealed compartment the upward overexercise of sealing block on to prevent Stopper posts.

Further, the outer barrel top is cylindrical, bottom is turbination structure, corresponding, in exhaust hole Bottom is provided with the rounding cone mouth with outer barrel bottom turbination structure matching.

Further, the exhaust apparatus is threadedly coupled with exhaust hole, i.e., be provided with the lateral wall of exhaust apparatus External screw thread, internal thread is provided with the madial wall of exhaust hole, by the way that exhaust apparatus is screwed in into exhaust hole and causes exhaust The bottom turbination structure of device is stuck at the rounding cone mouth of exhaust hole bottom, while forming sealing.

Further, the pipe sleeve is made up of the semi-circular cylindrical housing of two phase clampings, and the internal diameter of the pipe sleeve is bigger In outer diameter tube, to allow certain radial displacement and pipeline ovality, and be provided with the middle part outer wall of pipe sleeve with it is described The protruding ring that upper pipe collar and lower pipe collar coordinate, the both ends of pipe sleeve are processed that to be whittled into circular arc pointed.

Further, the upper pipe collar and lower pipe collar include two semicircle garter springs and two contiguous blocks, the company respectively Connect space of the block welding in the middle of the both ends of semicircle garter spring, and two semicircle garter springs mutually chimeric with the protruding ring, with Pipe collar and lower pipe collar is prevented to be subjected to displacement, fixed is more firm.

Further, the plug includes chunk, described upper group under upper chunk and turbination with the welding of lower pipe collar Block is cylinder, and the diameter of lower chunk is more than the diameter of upper chunk, and chunk is closely pasted with the slot under the turbination Close.

Further, the retaining ring includes upper disk and bottom axis, and the outer surface of bottom axis is provided with screw thread, And bottom axis is close to chunk under plug and set.

Compared with prior art, advantages and positive effects of the present invention are：

The great advantage for the fixing device that one, this programme are proposed shows its flexibility：1. the volume of total, weight It is smaller；The generation principle of fixed holding power is different from traditional counterweight mode；Whole device is to assemble, and all parts can be with Dismounting and replacing；2. different terrain environments, soil type and earth's surface inclination angle are suitable for；Meeting most flexible pipe laying will Ask, and can be used in combination with other laying methods；3. function has diversity, on the one hand pipeline can be fixed on into certain level Highly, applied to pipe vibration is reduced, it on the other hand can be used for fixed many different undersea devices in addition to pipeline；Side Just mount and dismount, be easy to repair and change；

Second, the firm and counterweight mechanism of the fixing device effectively reduces the hauled weight of pipe laying barge balancing weight, under be put in water In it is also more convenient and swift than traditional counterweight block mode or ditching mode, effectively reduce installation and transportation and reclaim cost, lifting The efficiency of pipe laying, and ensure that its firm effect is no less than traditional approach；

Third, the fixing device lays or is fixed with larger value for deep water：In deep water, either ditching or counterweight Cost will be greatly increased；For deeper waters, it is being not easy to do the seabed of careful exploration and smoothing processing, the adaptation of this device Property it is splendid, can make pipeline effectively avoid complexity sea-floor surficial；Deeper seabed, its seawater pressure is bigger, and this device is exactly Seawater pressure difference make use of to ensure firm, bigger hydraulic pressure, it is installed and firm effect is better.

Brief description of the drawings

Fig. 1 is fixing device overall structure diagram described in the embodiment of the present invention；

Fig. 2 is fixture structure exploded perspective view described in Fig. 1；

Fig. 3 is fixing device diagrammatic cross-section described in Fig. 1；

Fig. 4 is pipeline limit device structure schematic diagram described in the embodiment of the present invention；

Fig. 5 is schematic device admittedly described in the embodiment of the present invention；

Fig. 6 is exhaust apparatus solid described in the embodiment of the present invention with reference to figure；

Fig. 7 is the diagrammatic cross-section under exhaust apparatus sealing state described in the embodiment of the present invention；

Fig. 8 is the diagrammatic cross-section under exhaust apparatus exhaust condition described in the embodiment of the present invention.

Embodiment

In order to be more clearly understood from the above objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and implement The present invention will be further described for example.

A kind of seabed flexible pipe laying fixing device, as depicted in figs. 1 and 2, including solid ground device 3 and with filling admittedly Put the pipeline stopping means 2 of 3 connections, in the insertion of device admittedly 3 soil, utilize soil friction, seawater inside and outside differential pressure and interior Portion's counterweight keeps firm, and pipeline 1 is fixed through pipeline stopping means 2 by ring；With reference to Fig. 3 and Fig. 5, the device admittedly 3 is Hollow bottomless cylindrical structure, including upper casing 31 and side wall 32, its upper casing 31 are thicker；The centre of upper casing 31 is provided with a slot 33, to be connected with pipeline stopping means 2, counterweight tank 34 and exhaust hole 35, the counterweight have been arranged circumferentially around slot 33 Balancing weight 4 and exhaust apparatus 5 are respectively arranged with groove 34 and exhaust hole 35；The shape of the balancing weight 4 and counterweight trench bottom Profile is consistent, and can be fan-shaped or other shapes, and its height is less than the depth of counterweight tank 34, the actual weight of balancing weight 4 and Shape can be determined according to actual needs, be put into after the balancing weight 4 of different weight, size, density and welded and seal.From Fig. 3 and The bottom that Fig. 5 can be seen that the side wall 32 of device admittedly 3 is point finning 321, and the thickness of side wall 32 gradually increases from down to up Thickness, contributes to being initially inserted into for solid ground device 3, and is provided with pawl 36 on the madial wall of solid ground device 3, to increase solid ground device Soil frictional force during extraction.

With reference to Fig. 4, the pipeline stopping means 2 include the pipe sleeve 21 that is shielded to pipeline and with the slot 33 The plug 22 of profile and angle automatching, the outside of pipe sleeve 21 is arranged with the upper pipe collar 23 and lower pipe collar 24 that pipe sleeve is fixed, on Pipe collar 23 is fixedly connected with lower pipe collar 24 by bolt 25, and the plug 22 is connected with lower pipe collar 24, and pipeline 1 passes through pipe sleeve 21, and by upper and lower pipe collar banding pipe sleeve 21, plug 22 is inserted in slot 33, and is fixed by a retaining ring 6, by pipeline Stopping means 2 and device 3 is connected admittedly.The slot 33 is turbination structure, corresponding, the inside tool of device 3 on solid ground There is an inverted cone 37, while the presence of inverted cone 37 causes soil is gradually compacted to be hardened, discharged the water inside soil And air, soil is fully contacted with pawl, add the grip of solid ground device.

In the present embodiment, with reference to Fig. 6-Fig. 8, the exhaust apparatus 5 is axially symmetric structure, including an outer barrel, the top of outer barrel Portion, which is provided with vent board, vent board, is provided with several gas ports 51；Fig. 7 and Fig. 8 are respectively unidirectional self-closing exhaust apparatus The structure chart of sealing state and exhaust condition section, specifically, sealed compartment 52 and lower sealed compartment 53 on being provided with outer barrel, on The bottom of sealed compartment 52 and lower sealed compartment 53 has turbination valve port 7, and in upper sealed compartment 52 and lower sealed compartment 53 respectively The upper sealing block 521 and lower sealing block 531 for realizing sealing or circulation that can move up and down are provided with, the coning angle of two sealing blocks is same Seal bulkhead cone angle consistent, laminating can form complete seal after compression, and be provided with below vent board stretch into it is close The interior stopper posts 54 to prevent the upward overexercise of upper sealing block 521 of batten down.

With suction pipe since absorbed water the gas port 51 of exhaust apparatus 5 gas when, the interior sealing block of exhaust apparatus 5 can be upward because of pressure change Mobile, in Fig. 6, the outer barrel top is that cylindrical 55, bottom is turbination structure 56, corresponding, in exhaust hole 35 Bottom is provided with the rounding cone mouth 351 with outer barrel bottom turbination structure matching, to provide corresponding seal pressure.The row Device of air 5 is threadedly coupled with exhaust hole 35.External screw thread is provided with the lateral wall of exhaust apparatus 5, in exhaust hole 35 Madial wall on be provided with internal thread, by by exhaust apparatus 5 screw in exhaust hole and cause exhaust apparatus bottom inverted cone Shape structure is stuck at the rounding cone mouth of exhaust hole bottom, while forming sealing.

During exhaust, in Fig. 8, upper sealing block 521 is picked up first, and and then lower sealing block 531 is picked up, due to special Planform, sealing block will not be sealed reversely, form complete unimpeded path in whole exhaust apparatus, internal and air water along Path is flowed into suction pipe, is pumped into water aspirator, when solid ground device cylinder inside and outside differential pressure is identical, admittedly device begin to decline and gradually insert In burying, treat that solid ground device disposes completion in soil, extract suction pipe, it is upper and lower close under inside and outside differential pressure and self gravitation effect Envelope block returns to original position, so as to form dual-pressure sealing.

In addition, will be seen that from Fig. 2, the pipe sleeve 21 is made up of the semi-circular cylindrical housing 26 of two phase clampings, and described The internal diameter of pipe sleeve 21 is slightly larger than the external diameter of pipeline 1, to allow certain radial displacement and pipeline ovality, and at the middle part of pipe sleeve 1 The protruding ring 27 with the upper pipe collar 23 and the cooperation of lower pipe collar 24 is provided with outer wall, the section of protruding ring 27 is isosceles trapezoid. Pipe sleeve edge is designed to buffer transition, and the contact stress reduced with pipeline is concentrated, and the upper pipe collar 23 and lower pipe collar 24 are distinguished Including two semicircle garter springs 28 and two contiguous blocks 29, the contiguous block 29 is welded on the both ends of semicircle garter spring 28, and Space 281 in the middle of two semicircle garter springs 28 is mutually chimeric with the protruding ring 27, after upper and lower pipe collar bolt connection, two pieces Semi-circular cylindrical housing is tightened to form interference engagement to fix, to prevent upper pipe collar 23 and lower pipe collar 24 to be subjected to displacement, Gu Fixed is more firm.

The plug 22 includes chunk 222, the upper chunk under upper chunk 221 and turbination with the welding of lower pipe collar 221 be cylinder, and the diameter of lower chunk 222 is more than the diameter of upper chunk, chunk 222 and the slot under the turbination 33 are brought into close contact.The retaining ring 6 includes upper disk 61 and bottom axis 62, and the outer surface of bottom axis 62 is provided with spiral shell Line.

Whole fixing device when landing because device itself and balancing weight weight have necessarily the initially amount of involving in soil, Gu Ground device is internally formed closing.The water drawn by exhaust apparatus inside device admittedly is gentle, forms the pressure difference with outside seawater, Device side wall is pressed into soil admittedly under pressure；In the presence of inverted cone inside solid ground device, the soil of press-in Pressed more real and more real, while being combined closely with side wall and pawl.After press-in is finished, sealing is internally formed, in soil frictional force, seawater Under the collective effect of pressure difference and counterweight, whole fixing device keeps firm；During exhaust, under exhaust apparatus effect, by arrival gas The suction of mouth, upper sealing block and lower sealing block are picked up successively, because internal special construction is designed, and form one from top to bottom Path, internal sea water and air along this path discharge；When the gas port is exposed in seawater, by seawater pressure, two sealings Block is compressed to its conical surface and is close to turbination valve port circular conical surface, and now path is closed, and exhaust apparatus is internally formed dual close Envelope.

The fixing device that the present embodiment is proposed can form firm and lasting seabed fixed effect to floor file flexible duct, Enter the counterweight inside soil resistance, device negative pressure and upper casing at ground structure by using solid ground device to ensure whole device Stability, and by pawl, the partial structurtes arrangement such as inverted cone further improves the grasp and stability of solid ground device, shape Into good and lasting fixed effect；It can also lay what is fixed for other subsea equipments as needed above solid ground device Stopping means, does not elaborate herein, has general applicability and flexibility for the fixation of submarine structure；Furthermore, the dress The adaptability put and flexibility are high, strong to complicated landform and different soil suitabilities, soil of the fixing device in different soil properties It can insert and fasten in earth.

In addition, the depth of device insertion and the insertion angle on ground etc. can suitably be adapted to difference admittedly Seabed situation；Meanwhile, exhaust apparatus and stopping means are also convenient for handling, are easy to maintenance to change, and the design to exhaust apparatus has There are self-tightening and double sealing effect, more traditional exhaust outlet is safer, more flexible, with better seal effect and longer make Use the life-span；Whole fixing device small volume, installation save seabed flexible duct simply and without staff's diving operation Lay cost, more traditional seabed compound pipeline complex pipeline fixed form, which has more, to have an economic benefit and security, also can as needed with Other counterweight modes are used cooperatively, such as ditching buried channel etc., and the scope of application is wider.

The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc. Imitate embodiment and be applied to other fields, but every without departing from technical solution of the present invention content, the technical spirit according to the present invention Any simple modification, equivalent variations and the remodeling made to above example, still fall within the protection domain of technical solution of the present invention.

Claims (10)

1. a kind of seabed flexible pipe laying fixing device, it is characterised in that be connected including solid ground device and with solid ground device Pipeline stopping means；

Admittedly the device is hollow bottomless cylindrical structure, including upper casing and side wall；The centre of upper casing is provided with a slot, To be connected with pipeline stopping means, counterweight tank and exhaust hole, the counterweight tank and exhaust have been arranged circumferentially around slot Balancing weight and exhaust apparatus are respectively arranged with through hole；Admittedly the bottom of the device side wall is provided with point finning, and is filling admittedly Put and pawl is provided with madial wall.

2. fixing device according to claim 1, it is characterised in that：The pipeline stopping means include pipe sleeve and with it is upper State the plug of slot matching；The upper pipe collar and lower pipe collar that pipe sleeve is fixed, upper pipe collar and lower pipe collar are arranged with outside pipe sleeve It is bolted to connection；The plug is connected with lower pipe collar, in plug insertion slot, and is fixed by a retaining ring.

3. fixing device according to claim 2, it is characterised in that：The slot is turbination structure, corresponding, Admittedly device inside have an inverted cone.

4. fixing device according to claim 1, it is characterised in that：The exhaust apparatus includes an outer barrel, the top of outer barrel Portion, which is provided with vent board, vent board, is provided with several gas ports；Sealed compartment and lower sealed compartment, upper sealing are provided with outer barrel Cabin and the bottom of lower sealed compartment, which have in turbination valve port, upper sealed compartment and lower sealed compartment, is respectively arranged with the reality that can move up and down The upper sealing block and lower sealing block for now sealing or circulating, and be provided with below vent board and to stretch into sealed compartment in backstop The stopper posts of sealing block.

5. fixing device according to claim 4, it is characterised in that：The outer barrel top is that cylindrical structural, bottom are Turbination structure, it is corresponding, it is provided with the bottom of exhaust hole and exhaust apparatus outer barrel bottom turbination structure matching Rounding cone mouth.

6. fixing device according to claim 5, it is characterised in that：The exhaust apparatus is threadedly coupled with exhaust hole.

7. fixing device according to claim 2, it is characterised in that：The pipe sleeve by two phase clampings semi-circular cylindrical shell Body is constituted, and the internal diameter of the pipe sleeve is more than outer diameter tube.

8. fixing device according to claim 7, it is characterised in that：The upper pipe collar and lower pipe collar include two and half respectively Circular garter spring and two contiguous blocks, the contiguous block are welded in the middle of the both ends of semicircle garter spring, and two semicircle garter springs Space it is mutually chimeric with the protruding ring.

9. fixing device according to claim 2, it is characterised in that：The plug includes the upper chunk welded with lower pipe collar And chunk under turbination, the upper chunk for cylinder, and lower chunk diameter be more than upper chunk diameter.

10. fixing device according to claim 9, it is characterised in that：The retaining ring includes upper disk and bottom card Axle, the outer surface of bottom axis is provided with screw thread, and bottom axis is close to chunk under plug and set.