CN212226348U - Sealing joint of special rubber pipe for petroleum - Google Patents

Abstract

The utility model belongs to the technical field of the rubber tube joint, specific saying relates to a sealing joint of special rubber tube of oil, the combined type rubber tube of specially adapted heavy-calibre, superhigh pressure. The rubber tube comprises a core tube inserted into the rubber tube, and a buckling ring and a hoop sleeve which are arranged outside the rubber tube; wherein, the clamping ring includes first ring body and second ring body, its respectively with core pipe constitutes anti-drawing structure and multistage seal structure, the hoop cover sets up the outside of clamping ring will connect the department locking, multistage seal structure includes by preceding face seal section, line seal section and the tooth seal section that sets gradually after to. The special rubber tube sealing joint for petroleum realizes multi-stage progressive sealing connection and split buckling and locking, and has the advantages of remarkably improving the tensile strength and high-pressure-resistant sealing performance of the joint, conveying the drift diameter of the joint, stabilizing the flow and the like.

Description

Sealing joint of special rubber pipe for petroleum

Technical Field

The utility model belongs to the technical field of the rubber tube joint, specific saying relates to a sealing joint of special rubber tube of oil, the combined type rubber tube of specially adapted heavy-calibre, superhigh pressure.

Background

Compared with a common plastic hose, the rubber hose emphasizes a rubber pipe formed by extrusion molding of polymer chemical raw materials through processes such as vulcanization and the like, the inner layer of the rubber hose is generally provided with a reinforcing layer wound by steel wires or fibers, and the rubber hose has the characteristics of flexibility and rigidity and is wider and wider in application range. In particular, in the field of petroleum industry, the composite rubber pipe is widely applied to oil pipes in shallow sea, besides drilling oil pipes and vibrating oil pipes.

The pipe orifice of the rubber pipe needs a special joint structure when being connected so as to ensure firm connection and tight sealing, the common joint is mostly of a buckling structure, a sheath is sleeved outside the butt joint of the pipe orifice of the rubber pipe, and then the joint is hooped and locked by a pipe contracting machine. At present, a drilling rubber pipe and inner blowout prevention pipe assembly for petroleum drilling is generally formed by drawing a core and an outer sleeve through a pipe locking machine, commonly called as 'one-pull', and the phenomenon that a joint falls off in the use process in a high-pressure state occurs; secondly, in the pipe reducing process of the joint structure, the outer sheath is easy to compress and deform the inner rubber pipe, and the flow velocity of a conveying medium are seriously influenced. In order to solve the problems, the joint structure inserts the connecting core pipe at the butt joint of the pipe orifices of the rubber pipe so as to improve the supporting force of the rubber pipe, however, the existing rubber pipe is mostly of a composite structure, the middle of the rubber pipe is provided with the enhancement layer so that the pipe diameter is continuously increased, the force is very high when the pipe is contracted and pressed at the joint, once the operation is improper, the core pipe is easily compressed and deformed, and the purpose of path conveying cannot be realized, so the core pipe supporting effect is poor, and the improvement is needed; moreover, the joint structure is too simple, the locking of the rubber tube usually adopts a triangular sealing structure (inverted tooth) with a single form, when the pipe is buckled and compressed, the buckling pressure distribution is uneven, the inner side of the rubber tube is easily damaged, when the rubber tube is used in severe environments such as underground and seabed, the problems of separation, fracture, medium leakage and the like easily occur when the rubber tube is stressed and stretched at the joint, the structural strength and the sealing performance of the rubber tube are seriously reduced, and the application range of the rubber tube is also limited.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a realize the special rubber tube sealing joint of oil of multistage progressive formula sealing connection, split type withhold locking, can show improvement joint tensile strength and high pressure resistant sealing performance and the latus rectum of joint department is carried, the flow is stable.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a sealing joint of special rubber tube of oil which characterized in that: comprises a core tube inserted into a rubber tube, and a buckling ring and a hoop sleeve which are arranged outside the rubber tube; wherein, the clamping ring includes first ring body and second ring body, its respectively with core pipe constitutes anti-drawing structure and multistage seal structure, the hoop cover sets up the outside of clamping ring will connect the department locking, multistage seal structure includes by preceding face seal section, line seal section and the tooth seal section that sets gradually after to.

The additional technical characteristics of the sealing joint for the special rubber pipe for petroleum also comprise:

the tooth sealing section comprises a plurality of annular inverted teeth arranged on the outer surface of the core pipe, the inner surface of the second ring body is provided with annular convex strips corresponding to the annular inverted teeth, the annular inverted teeth and the annular convex strips are used for tightly gripping and sealing the rubber pipe, and the annular inverted teeth and the annular convex strips are both in a plurality of spiral forms or in a form of coaxial parallel arrangement;

the line sealing section comprises a plurality of first circumferential grooves formed in the outer surface of the core pipe, the cross section of each first circumferential groove is in an arc shape, first circumferential pressing strips corresponding to the first circumferential grooves are arranged on the inner surface of the second ring body, and the end parts of the first circumferential pressing strips and the arc-shaped bottoms of the first circumferential grooves seal the rubber pipe pressing lines;

the surface sealing section comprises a plurality of second annular grooves formed in the outer surface of the core pipe and second annular pressing strips arranged on the inner surface of the second annular body and corresponding to the second annular grooves, the cross sections of the second annular grooves are inverted trapezoidal, and the top surfaces of the second annular pressing strips and the bottom surfaces of the second annular grooves seal rubber pipe pressing surfaces;

the anti-drawing structure is located at the rear part of the multi-stage sealing structure and comprises a plurality of annular clamping grooves formed in the outer surface of the core pipe, annular clamping teeth matched with the annular clamping grooves are arranged on the inner surface of the first ring body, and the sections of the annular clamping grooves and the annular clamping teeth are both inverted trapezoids and used for at least locking a reinforcing layer of the rubber pipe;

the hoop sleeve wraps the buckling ring and the core pipe, an annular seal head is arranged at the end part of one side close to the core pipe, and a cavity for heat insulation is formed between the annular seal head and the buckling ring;

the hoop sleeve is provided with an extension section which exceeds the pipe orifice of the core pipe at one side close to the rubber pipe, and the end part of the extension section is provided with a hoop for locking the outer wall of the rubber pipe;

the extension section of the ferrule has an expanding expansion section at the pipe orifice of the core pipe;

-providing a bushing between the ferrule and the snap ring, the bushing locking the snap ring in place;

the core pipe, the buckling ring and the hoop sleeve are all made of heat-resistant alloy structural steel, the rubber pipe is a composite pipe comprising a reinforcing layer, the anti-pulling structure is at least connected with the reinforcing layer of the rubber pipe, the multi-stage sealing structure is at least connected with part of an inner rubber layer and the reinforcing layer of the rubber pipe, and the inner diameter of the core pipe is not less than the inner diameter of the rubber pipe.

The utility model provides a sealing joint of special rubber tube of oil compares with prior art, has following advantage: firstly, the core pipe of the sealing joint is inserted into the pipe orifice of the rubber pipe and forms a multi-stage progressive sealing structure with the buckling and pressing ring sleeved outside, the hoop is arranged on the outer layer of the buckling and pressing ring to lock the joint, the buckling and pressing ring can ensure that the inner side of the rubber pipe is locked with the core pipe and the connecting strength is improved, the buckling and pressing ring also has the effects of buffering the buckling and pressing force of the shrinking pipe and protecting the shape of the core pipe, and the purposes of large-flow transmission of the drift diameter and the flow rate at the joint and safety and stability of the; secondly, the multistage sealing structure in the rubber hose comprises a surface sealing section, a linear sealing section and a tooth sealing section which are sequentially arranged from front to back, so that a staged progressive sealing effect is realized, layered locking sealing is performed on the wall of the rubber hose, the pressure distribution of a pipe contracting buckle is ensured to be balanced, the inner layer of the rubber hose is protected from being damaged, a double-layer effect of enhancing the sealing and locking strength and reducing the compression damage of the rubber hose is achieved, and the high-pressure resistant sealing effect is excellent particularly in a petroleum pipeline; and thirdly, as the buckling ring is in split design, the buckling ring comprises a first ring body and a second ring body which are sleeved outside the rubber pipe, the first ring body and the second ring body respectively form an anti-pulling structure and a multi-stage sealing structure with the core pipe, the split structure is convenient for assembling the joint assembly, the functions of the first ring body and the second ring body are independent and closely related, the combination of longitudinal anti-pulling and strong sealing of the ring direction is realized, the locking buckling pressure can be further dispersed, the stress of the inner liner pipe and the core pipe is more balanced, the change of the inner diameter of the core pipe flow is prevented, and the guarantee is provided.

Drawings

Fig. 1 is a schematic structural diagram of a special rubber hose sealing joint for petroleum according to the patent.

Detailed Description

The structure and the working principle of the special rubber pipe sealing joint for petroleum according to the present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1, it is a schematic structural diagram of the special rubber pipe sealing joint for petroleum according to the present invention. The structure of the novel sealing joint comprises a core pipe 2 inserted into a rubber pipe 1, and a buckling ring 3 and a hoop sleeve 4 which are arranged outside the rubber pipe 1; the buckling ring 3 comprises a first ring body 31 and a second ring body 32, the first ring body 31 and the second ring body 32 respectively form an anti-pulling structure and a multi-stage sealing structure with the core pipe 2, the hoop 4 is arranged on the outer side of the buckling ring 3 to lock the joint, and the multi-stage sealing structure comprises a face sealing section 321, a line sealing section 322 and a tooth sealing section 323 which are sequentially arranged from front to back.

The working principle is as follows: the core tube 2 is inserted into the orifice of the rubber tube 1, and the first ring body 31 and the second ring body 32 are respectively sleeved outside the core tube 2, wherein the first ring body 31 is positioned at the rear part of the core tube 2, and the first ring body and the second ring body compress the reinforced layer 11 (steel wire winding) of the rubber tube 1 to form a drawing-resistant structure; the second ring body 32 is positioned at the front part of the core pipe 2, the inner rubber layer and the enhancement layer 11 of the rubber pipe 1 are compressed by the second ring body and the second ring body to form a multi-stage sealing structure, and the multi-stage sealing structure respectively realizes a progressive composite sealing mode of surface sealing, line sealing 322 and tooth sealing with the inner side of the rubber pipe 1, so that the sealing is ensured to be precise, the rubber layer is not damaged, the disjointed leakage is prevented, the whole joint is locked by the hoop sleeve 4, the connecting structure strength and the high-pressure-resistant sealing performance of the joint assembly are further improved, meanwhile, the buckling ring can also disperse the buckling pressure degree of the contracted pipe, the core pipe 2 is protected.

In the structure of the sealing joint of the special rubber hose 1 for petroleum,

preferably, the tooth sealing section 323 comprises a plurality of circumferential inverted teeth 301 arranged on the outer surface of the core tube 2, the inner surface of the second ring body 32 is provided with a circumferential protruding strip 302 corresponding to the circumferential inverted teeth 301, the circumferential inverted teeth 301 and the circumferential protruding strip 302 bite and seal the rubber tube 1, and both the circumferential inverted teeth 301 and the circumferential protruding strip 302 are in a plurality of spiral forms or in a form of coaxial parallel arrangement, the tooth-shaped biting structure particularly enhances the connection strength, resists stretching and prevents separation, and preferably, the reinforcing layer 11 of the rubber tube 1 is arranged in the tooth sealing section 323;

the line sealing 322 section comprises a plurality of first circumferential grooves 303 arranged on the outer surface of the core pipe 2, the cross section of each first circumferential groove 303 is arc-shaped, the inner surface of the second ring body 32 is provided with a first circumferential bead 304 corresponding to the first circumferential groove 303, the end part of each first circumferential bead 304 and the arc-shaped bottom of each first circumferential groove 303 press the rubber pipe 1 against the line sealing 322, the sealing lines in the line sealing 322 section are arranged in a plurality of coaxial spiral shapes or in parallel, the conveying medium is prevented from leaking to the rear tooth sealing section 323, meanwhile, when the end part of the first circumferential bead 304 tightly presses the rubber hose 1, the two sides of the arc-shaped bottom of the first circumferential groove 303 provide redundant space for the deformation of the rubber layer, namely, the bottom part realizes the line sealing 322, the two sides contain the deformed rubber layers, the rubber layers are prevented from being damaged, the sealing safety effect is improved, and the reinforcing layer 11 and part of the inner rubber layer/outer rubber layer of the rubber tube 1 can be arranged in the line sealing 322 section;

the surface sealing section 321 includes a plurality of second circumferential grooves 305 disposed on the outer surface of the core tube 2 and a second circumferential bead 306 disposed on the inner surface of the second ring body 32 and corresponding to the second circumferential grooves 305, the cross section of the second circumferential groove 305 is inverted trapezoid, the top surface of the second circumferential bead 306 and the bottom surface of the second circumferential groove 305 press the rubber tube 1 to form a surface seal, the sealing surface in the surface sealing section 321 is a plurality of concentric spiral bands or parallel arranged rings, so as to prevent the conveying medium from leaking to the rear line sealing section 322, and meanwhile, the inverted trapezoid tooth-shaped engagement structure can provide sufficient pressure for the stable connection of the tube opening and the rubber tube 1, and can ensure an effective sealing area, and the inner rubber layer, the reinforcing layer 11 or a part of the outer rubber layer of the rubber tube 1 can be disposed in the surface sealing section 321;

it should be noted that, because the pipe diameter of the special petroleum rubber pipe 1 is large, the pipe wall is thick, the multi-stage sealing structure formed by the second buckling ring and the core pipe 2 performs layered compression sealing on the rubber pipe 1, the sections of the circumferential convex strip 302, the first circumferential pressing strip 304 and the second circumferential pressing strip 306 on the inner surface of the second ring body 32 are set to be rectangular, and of course, the sections of the circumferential convex strip 302 can also be set to be inverted tooth-shaped according to the structure of the outer surface of the core pipe 2, for example, the tooth sealing section 323; a section of the wire seal 322, the cross section of the first circumferential bead 304 may be provided with a taper shape; the section of the face seal section 321 and the second circumferential bead 306 may be an inverted trapezoid; meanwhile, the distance, the number and the size of the rubber tubes 1 in each sealing section can be adaptively adjusted according to different layers so as to meet the requirements of actual working conditions;

furthermore, in order to enhance the effect of the pipeline drift diameter conveying, the multistage sealing structure is preferably arranged in a conical inclined plane between the core pipe 2 and the buckling ring 3, namely, the part of the core pipe 2 inserted into the rubber pipe 1 is conical, and the diameter of the conical tip port of the multistage sealing structure can be consistent with the inner diameter of the rubber pipe 1, namely, after the rubber pipe 1 is butted, the flow and the flow speed of the internal conveying of the rubber pipe are completely unchanged, the drift diameter effect is better, and the operation without flow resistance and smoothness is really realized;

as a preferred embodiment, the anti-pulling structure is located at the rear of the multi-stage sealing structure, the anti-pulling structure includes a plurality of circumferential clamping grooves 307 arranged on the outer surface of the core tube 2, the inner surface of the first ring body 31 is provided with circumferential clamping teeth 308 matched with the circumferential clamping grooves 307, the sections of the circumferential clamping grooves 307 and the circumferential clamping teeth 308 are both inverted trapezoids for at least locking the reinforcing layer 11 of the rubber tube 1, the inverted trapezoids toothed meshing structure can lock the reinforcing layer 11 of the rubber tube 1 more safely and stably, internal disjunction and unstable sealing phenomena during longitudinal stretching of the joint are prevented, meanwhile, mutual independence of an anti-pulling function and a sealing connection function is realized, when the pipe is locked and buckled, respective stress is more balanced, a buckling pressure rubber layer is prevented from being damaged or the inner diameter of the core tube 2 is changed, and through-;

preferably, the hoop sleeve 4 wraps the buckling ring 3 and the core tube 2, the end part of one side, close to the core tube 2, of the hoop sleeve is provided with the annular seal head 41, a cavity 40 for heat insulation is formed between the annular seal head 41 and the buckling ring 3, the heat insulation cavity 40 can block heat transmission, a glue layer is prevented from being fused or a multi-stage sealing structure is prevented from being damaged by heat during welding operation of the joint, and the use safety performance of the sealing joint is improved;

furthermore, the hoop sleeve 4 is provided with an extension section 42 which exceeds the pipe orifice of the core pipe 2 at one side close to the rubber pipe 1, the end part of the extension section 42 is provided with a hoop 43 for locking the outer wall of the rubber pipe 1, the extension section 42 deeply wraps the root part of the rubber pipe 1 and is positioned by the hoop 43, the movement of the rubber pipe 1 is protected by guiding, the end parts of the core pipe 2 and the second ring body 32 are prevented from being worn and the rubber pipe 1 is prevented from being bent, and the service life of a joint pipeline is prolonged;

furthermore, the extension section 42 of the hoop 4 is provided with an expanding expansion section 44 at the pipe orifice of the core pipe 2, the delivery pressure of the special petroleum rubber pipe 1 is high, the joint of the pipe fitting and the joint is subjected to stacking and twisting of rubber layers due to the internal pressure or external stretching and pulling, the mutual abrasion is serious, and the expanding expansion section 44 provides a redundant space for the deformation of the rubber layers, so that the rubber pipe 1 and the sealing structure are protected;

the two end parts of the hoop sleeve 4 are respectively buckled and fixed with the core pipe 2 and the outer wall of the rubber pipe 1 through the annular seal head 41 and the hoop ring 43, so that the function of positioning the internal buckling ring 3 is achieved, further, the lining 5 is arranged between the hoop sleeve 4 and the buckling ring, the buckling ring 3 is locked and positioned by the lining 5, the buckling ring 3 is prevented from position shifting when the pipe is locked and pressed or the joint is pressed in work, the phenomenon of instability of a sealing structure is avoided, the overall strength of a joint composite structure is enhanced, and a plurality of parts are connected and combined more tightly and firmly;

furthermore, the inner surface of the hoop sleeve 4 is provided with a plurality of annular buffer grooves 45, the buffer grooves 45 are coaxially arranged in parallel or are of a spiral structure, after the buffer grooves 45 deform, the surface area is extended, the outer wall of the rubber tube 1 and the core tube 2 can be tightened more, the joint part is more stable, the locking force is improved, and the effect of preventing disjointing is achieved, meanwhile, the buffer grooves 45 are matched with the hoop 43 and the annular seal head 41 for use, the acting force on the core tube 2 during locking and pressing of the locking tube can be relieved, the stress of the buckling and pressing ring 3 is more uniform, foreign matters are prevented from entering the interior of the joint structure by the double-end plugging, and the safety performance of the;

preferably, the core tube 2, the buckling ring 3 and the hoop sleeve 4 are made of heat-resistant alloy structural steel, the mechanical strength is high, the pressure resistance and the corrosion resistance are realized, the processing and the manufacturing are convenient, the using performance and the economic benefit are good, the rubber tube 1 is a composite tube comprising a reinforcing layer 11, the anti-pulling structure is at least connected with the reinforcing layer 11 of the rubber tube 1, the multi-stage sealing structure is at least connected with part of an inner rubber layer/outer rubber layer and the reinforcing layer 11 of the rubber tube 1, the inner diameter of the core tube 2 is preferably not less than the inner diameter of the rubber tube 1, the drift diameter conveying is ensured, and the flow rate and the.

Claims (10)

1. The utility model provides a sealing joint of special rubber tube of oil which characterized in that: comprises a core tube inserted into a rubber tube, and a buckling ring and a hoop sleeve which are arranged outside the rubber tube; wherein, the clamping ring includes first ring body and second ring body, its respectively with core pipe constitutes anti-drawing structure and multistage seal structure, the hoop cover sets up the outside of clamping ring will connect the department locking, multistage seal structure includes by preceding face seal section, line seal section and the tooth seal section that sets gradually after to.

2. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the tooth sealing section is including setting up the multichannel hoop pawl of core pipe surface, the internal surface of second ring body set up with the hoop sand grip that the hoop pawl corresponds, hoop pawl and hoop sand grip are sealed and the two is the form of multichannel spiral form or for coaxial line parallel arrangement with the rubber tube clenching.

3. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the line seal section is including setting up the first hoop recess of the multichannel of core pipe surface, the cross-section of first hoop recess is convex, the internal surface of second ring body set up with the first hoop layering that first hoop recess corresponds, the tip of first hoop layering and the arc bottom of first hoop recess are sealed with rubber tube crimping line.

4. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the face seal section is including setting up the annular groove of multichannel second and setting on the core pipe surface are in the internal surface of second ring body with the annular layering of second that the annular groove of second corresponds, the annular groove cross-section of second is down trapezoidal, the top surface of the annular layering of second compresses tightly the face with the rubber tube with the bottom surface of the annular groove of second and seals.

5. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the anti-pulling structure is located at the rear part of the multi-stage sealing structure and comprises a plurality of annular clamping grooves formed in the outer surface of the core pipe, annular clamping teeth matched with the annular clamping grooves are arranged on the inner surface of the first ring body, and the sections of the annular clamping grooves and the annular clamping teeth are inverted trapezoids and used for at least locking a reinforcing layer of a rubber pipe.

6. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the hoop cover wraps the buckling ring, the core pipe and the end part of one side, close to the core pipe, of the core pipe, and a cavity for heat insulation is formed between the annular seal head and the buckling ring.

7. The sealing joint of the special rubber hose for petroleum according to claim 1 or 6, characterized in that: the hoop sleeve is provided with an extension section which exceeds the pipe opening of the core pipe at one side close to the rubber pipe, and the end part of the extension section is provided with a hoop for locking the outer wall of the rubber pipe.

8. The sealing joint of the special rubber hose for petroleum according to claim 7, characterized in that: the extension section of the hoop sleeve is provided with an expanding expansion section at the pipe orifice of the core pipe.

9. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: and a bushing is arranged between the hoop sleeve and the buckling ring, and the buckling ring is locked and positioned by the bushing.

10. The sealing joint of the special rubber hose for petroleum according to claim 1, characterized in that: the core pipe, the buckling ring and the hoop sleeve are all made of heat-resistant alloy structural steel, the rubber pipe is a composite pipe comprising a reinforcing layer, the anti-pulling structure is at least connected with the reinforcing layer of the rubber pipe, the multi-stage sealing structure is at least connected with part of an inner rubber layer and the reinforcing layer of the rubber pipe, and the inner diameter of the core pipe is not less than the inner diameter of the rubber pipe.

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