CN212028849U - Buckling type safety hose assembly - Google Patents

Abstract

The utility model discloses a withhold formula safety hose assembly. Including establishing outer tube (2) outside inner tube (1) in the cover, especially inner tube (1) and outer tube (2) are in connecting portion (3) department threaded connection of near inner tube (1) one end, the one end of hose is withheld the centre gripping by inner tube (1) and outer tube (2), outer tube (2) internal wall has a plurality of interior annular protrusion (4), the surface of inner tube (1) has a plurality of cyclic annular pawl (5) of near end mouth portion and a plurality of outer annular protrusion (6) of near inner, the height that highly is less than outer annular protrusion (6) of cyclic annular pawl (5), in a plurality of interior annular protrusion (4) of the internal wall of outer tube (2), the height of 3 ~ 8 interior annular protrusion (4) of port direction by inner is degressive. The utility model discloses can stand great intraductal liquid pressure and higher tensile force and have splendid leak-proof performance.

Description

Buckling type safety hose assembly

The technical field is as follows:

the utility model relates to a hose that can carry liquid specifically indicates a hose assembly that can carry high-pressure liquid.

Background art:

the liquid conveying is a problem which must be faced by modern industry, wherein the technical problem faced by using flexible pipes (rubber pipes) to convey liquid is more, especially with the development of marine oil industry, an offshore drilling platform is a necessary device for marine oil production, for example, a semi-submersible offshore drilling platform needs six flexible pipe assemblies to perform hydraulic supporting connection between the platform and a ship body in order to keep verticality and stability, each flexible pipe is provided with an oil cylinder and communicated with an oil supply, when the ship body is in a floating state, the flexible pipe conveys hydraulic oil under the control of a command center, and a piston in the oil cylinder is pushed by a piston rod to reciprocate up and down to adjust hydraulic pressure so as to eliminate the deflection of the platform caused by floating inclination of the ship body, thereby keeping the offshore drilling platform in a horizontal state all the time and ensuring the normal operation of the platform. The hose can also be applied to systems such as drilling and well cementation of an ocean drilling platform, and matched products are applied to a self-elevating ocean drilling platform, a semi-submersible ocean drilling platform and a drilling ship. The flexible pipe is arranged on a drilling machine of a drilling platform, can be used for flexible connection between a drilling riser and a drilling machine rotating head, can also be used for connection between a mud pump and a manifold, adjustment of installation errors and shock absorption between the mud pump and a drilling machine pipeline, and can also be used for bridging between a platform drilling machine and a mud ship. When the flexible connection hose is used for high-pressure flexible connection between a rotary joint at the top of a drill rod and a gooseneck head of a stand pipe, high-pressure slurry is conveyed to a drill bit along with the up-and-down operation of the drill rod, and the slurry is driven into the underground through the drill rod and then returns to the ground for taking out rock nitrate drilled and cut, lubricating a well wall and cooling the drill bit, so that the flexible connection hose is an important accessory for ensuring marine drilling. The structure of the hose and the metal joint in the buckling-pressing type hose in the prior art is quite complex in preparation and high in cost, and the length of the non-bendable part in the hose assembly is too long, so that the use of the hose is affected.

The invention content is as follows:

the utility model aims at disclosing a safe and reliable hose assembly of a buckling type joint capable of resisting high pressure and high tensile force and preventing leakage.

Realize the utility model discloses a technical solution is: establish the outer tube outside the tube including the cover, the key is that inner tube and outer tube are in the connecting portion department threaded connection of near inner tube one end, the one end of hose is withheld the centre gripping by inner tube and outer tube, the internal face of outer tube has a plurality of interior annular arch, the surface of inner tube has a plurality of cyclic annular pawl that approach the port portion and is close a plurality of outer annular arch of inner, the height of cyclic annular pawl is less than outer annular arch's height, in a plurality of interior annular arch of the internal face of outer tube, by 3 ~ 8 interior annular arch's of inner to port direction height degressive.

The outer annular protrusions of the inner pipe and the inner annular protrusions of the outer pipe are arranged in a staggered mode, and the heights of the outer annular protrusions arranged in the direction from the inner end of the inner pipe to the port of the inner pipe in the outer annular protrusions of the inner pipe are gradually reduced.

The height of the outer annular bulges in the direction closest to the port is larger than that of the adjacent outer annular bulges.

The hose is composed of a supporting layer consisting of a rubber inner layer, an inner fiber cloth layer, a plurality of rubber layers and a plurality of wound steel wire layers, and an outer fiber cloth layer and an outer rubber protective layer from inside to outside.

The inner tube is provided with a plurality of outer annular bulges and a plurality of inner annular bulges, the outer tube is provided with a plurality of inner annular bulges and a plurality of outer annular bulges, the inner annular bulges and the outer annular bulges are respectively meshed with the inner surface and the outer surface of the supporting layer of the hose, and the inner annular inverted teeth of the inner tube are meshed with the inner rubber layer of the hose.

The inclined surface of the convex ring on the inner wall surface of the close port of the outer tube presses the end part of the outer rubber protective layer of the hose.

The port of the inner pipe is extended by an extension section compared with the port of the outer pipe.

The distance between the inner annular bulges and the outer annular bulges of the inner pipe and the outer pipe and the surface of the supporting layer of the corresponding hose is 1-4 mm.

The heights of the outer annular bulges of the inner pipe and the 3-8 inner annular bulges at the inner end of the outer pipe are sequentially decreased by 0.2-0.3 mm.

The utility model discloses a basic structure is withhold formula hose and metal joint and is connected, because special structural design has been made to the link and the metal joint of hose self structure and hose, adaptable different withholds the process method, realize the splendid connection cooperation of hose and metal joint, realize that the hose assembly can stand great intraductal liquid pressure and higher tensile force and can not appear breaking away from between hose and the metal joint, and have splendid leak-proof performance, the simple and manufacturing cost of simultaneous manufacturing process is lower.

Description of the drawings:

fig. 1 is a schematic overall sectional structural view of an embodiment of the present invention.

Fig. 2 is a schematic sectional structure view of the inner tube.

Fig. 3 is a schematic sectional structure view of the outer tube.

Fig. 4 is a sectional structure diagram of the hose.

The specific implementation mode is as follows:

the detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings, and it should be noted that the detailed description of the embodiments is provided for comprehensive understanding of the technical spirit of the present invention, and should not be construed as limiting the scope of the claims of the present invention.

Referring to fig. 1 to 4, the technical solution of the embodiment of the present invention is: establish outer tube 2 outside inner tube 1 including the cover, the key is that inner tube 1 and outer tube 2 are in 3 threaded connection of connecting portion of 1 one end of nearly inner tube, the one end of hose is withheld by inner tube 1 and 2 withholding of outer tube, the internal face of outer tube 2 has a plurality of interior annular bulge 4, the surface of inner tube 1 has a plurality of cyclic annular pawl 5 that are close to the port portion and a plurality of outer annular bulge 6 that are close to inner, cyclic annular pawl 5 highly is less than the height of outer annular bulge 6, in a plurality of interior annular bulge 4 of the internal face of outer tube 2, by interior 3 ~ 8 interior annular bulge 4's of port direction height degressive. The connecting portion 3 in the above-mentioned technical solution is a connecting portion for connecting with other hoses or other components, and it is only one of the prior art, for example, a connecting flange, and detailed description is omitted because of the prior art, the inner end refers to one end of the inside of the annular cavity formed after the inner and outer pipes (1, 2) are connected, and the port refers to the opening portion of the inner and outer pipes (1, 2) (shown in fig. 1); in actual preparation, after the inner and outer pipes (1, 2) and the hose are installed as shown in fig. 1, external force is applied to the outer pipe 2 to enable the outer pipe 2 to shrink and deform towards the axis direction so as to fasten and clamp the end part of the hose, the outer pipe 2 is occluded with the outer surface of the hose, and the occlusion degree or mutual embedding degree of the inner annular bulge 4 which is closer to the inner end to the outer surface of the hose is increased, so that the occlusion degree or the incremental increase of the occlusion force is formed; the annular inverted teeth 5 of the inner pipe 1 form a mutually-meshed surface on the inner surface of the hose to form a resistance surface, meanwhile, the height of the annular inverted teeth is smaller than that of the outer annular bulge 6, so that the meshing degree is smaller, the rubber surface of the hose cannot be damaged, and the excellent sealing performance is achieved; the height of the inner annular protrusion 4 of the outer tube 2 is equal to that of the outer annular protrusion 6 of the inner tube 1, or the height of the inner annular protrusion 4 is slightly larger than that of the outer annular protrusion 6, and the height difference is preferably 0.5-1.5 mm. Due to the structure, different compression or occlusion deformation sections are formed between the hose and the inner and outer pipes (1, 2), so that the tensile resistance of the hose assembly is improved, and the hose assembly has excellent sealing performance.

The hose assembly is characterized in that a plurality of outer annular protrusions 6 of the inner tube 1 and a plurality of inner annular protrusions 4 of the outer tube 2 are arranged in a staggered mode, the heights of the outer annular protrusions 6 arranged from the inner end of the inner tube 1 to the port direction of the inner tube 1 in the outer annular protrusions 6 of the inner tube 1 are gradually reduced, the outer annular protrusions are matched with the inner annular protrusions 4 of the outer tube 2, effective clamping of a hose close to the inner end is achieved, or the meshing effect of the inner tube (1) and the outer tube (2) on the wall of the hose is improved, and the number of the outer annular protrusions 6 is preferably 3-8.

The height of the outer annular bulge 6 closest to the end opening direction of the outer annular bulges 6 is larger than that of the adjacent outer annular bulge 6, a resistance part for preventing the hose from falling off is formed between the inner pipe (1) and the outer pipe (2), when the hose is stretched by external force, the part of the hose clamped by the inner annular bulge 4 and the outer annular bulge 6, which is bound to fall off the inner pipe (1) and the outer pipe (2), must pass through a narrower narrow opening, which requires that the hose per se must have larger deformation, so that the resistance for the hose to fall off is increased, and the tensile resistance of the hose assembly is further improved.

The hose is composed of a rubber inner layer 7, an inner fiber cloth layer 8, a supporting layer 9 composed of a plurality of rubber layers and a plurality of wound steel wire layers, an outer fiber cloth layer 10 and an outer rubber protective layer 11 from inside to outside, and the hose with the structure has excellent compression resistance, good bending performance, wear resistance and corrosion resistance, and the outer rubber protective layer 11 also has good fireproof performance.

In order to further improve the connection between the metal joint and the hose and improve the overall performance of the hose assembly, the outer annular protrusions 6 of the inner tube 1 and the inner annular protrusions 4 of the outer tube 2 are respectively engaged with the inner and outer surfaces of the supporting layer 9 of the hose, that is, the inner and outer surfaces of the supporting layer 9 are engaged with the inner and outer annular protrusions (4, 6) of the inner and outer tubes (1, 2) by peeling off the inner rubber layer 7, the inner fiber cloth layer 8, the outer fiber cloth layer 10 and the outer rubber protective layer 11 of the hose corresponding to the inner annular protrusions 4 and the outer annular protrusions 6 on the inner and outer tubes (1, 2) during the manufacturing process, so that the outer tube 2 compresses the supporting layer 9 to shrink and deform towards the axis during the stress to shrink and deformation towards the axis, and part of the steel wires are located between the inner annular protrusions 4 and the outer annular protrusions 6, or the inner and outer surfaces of the supporting layer 9 form continuous waves, the connection between the hose and the metal joint is firmer and the hose is less likely to be separated from the metal joint when the hose is subjected to an external force, and the plurality of annular inverted teeth 5 of the inner pipe 1 are engaged with the rubber inner layer 7 of the hose.

The inclined plane of the outer convex ring 12 of the inner wall surface of the outer pipe 2 close to the port presses the end part of the outer rubber protective layer 11 of the hose, the inclined plane presses the outer rubber protective layer 11 to make it compress and deform, when the hose is subjected to external force of stretching, the hose part clamped by the metal joint has slight radial shrinkage, at this time, the outer rubber protective layer 11 releases to be compressed and deformed, so as to ensure that no pressure-free gap is generated between the inner wall surface of the outer pipe 2 and the outer surface of the hose, and the leakage-proof performance of the hose assembly is greatly improved. The port of the inner pipe 1 is extended by an extension section 13 compared with the port of the outer pipe 2, that is, after the outer pipe 2 is in threaded connection with the inner pipe 1, the inner pipe 1 is extended by the extension section 13 compared with the outer pipe 2, on one hand, the extension section 13 increases the contact length and area between the inner wall surface of the hose and the outer wall surface of the inner pipe 1 to improve the leakage-proof performance, and on the other hand, the extension section 13 has a tiny support for the hose, and the support can prevent the hose from being bent greatly at the port of the outer pipe 2 to generate a gap between the hose and the outer pipe 2 when the hose is bent.

The distance between the inner annular protrusions 4 and the outer annular protrusions 6 of the inner and outer pipes (1, 2) and the surface of the supporting layer 9 of the corresponding hose is 1-4 mm, when the heights of the inner annular protrusions 4 and/or the outer annular protrusions 6 are the same, the distance is 1-2 mm, and the external force applying mode of the outer pipe 2 is preferably a rolling process, so that the inner pipe 1, the outer pipe 2 and the hose are more suitable to be meshed, when the heights of the inner annular protrusions 4 and/or the outer annular protrusions 6 are gradually decreased, the distance is 1-3.5 mm, on one hand, a space is reserved for gradual decrease of the heights, on the other hand, a selection is reserved for the external force applying mode of the outer pipe 2, and for example, the rolling process can be adopted, and a radial pressing mode can also be adopted.

The heights of the outer annular protrusions 6 of the inner pipe 1 and the 3-8 inner annular protrusions 4 close to the inner end of the outer pipe 2 are sequentially decreased by 0.2-0.3 mm, the structure can enable the clamping force of the inner pipe (1) and the outer pipe (2) to the hose to be properly increased, excessive stress concentration cannot be generated in the supporting layer 9 of the hose due to proper height change, and the structure is beneficial to improving tensile strength.

Claims (9)

1. The utility model provides a withhold formula safety hose assembly, establish outer tube (2) outside inner tube (1) including the cover, its characterized in that inner tube (1) and outer tube (2) are in connecting portion (3) department threaded connection of near inner tube (1) one end, the one end of hose is withheld the centre gripping by inner tube (1) and outer tube (2), outer tube (2) internal face has a plurality of interior annular protrusion (4), the surface of inner tube (1) has a plurality of cyclic annular pawl (5) of near end mouth portion and a plurality of outer loop form protrusion (6) of near inner, the height that highly is less than outer loop form protrusion (6) of cyclic annular pawl (5), in a plurality of interior annular protrusion (4) of the internal face of outer tube (2), the height by 3 ~ 8 interior annular protrusion (4) of inner to port direction is degressive.

2. The buckle-type safety hose assembly according to claim 1, wherein the plurality of outer annular protrusions (6) of the inner tube (1) are disposed to be offset from the plurality of inner annular protrusions (4) of the outer tube (2), and the heights of the plurality of outer annular protrusions (6) arranged in the direction from the inner end of the inner tube (1) to the port of the inner tube (1) among the plurality of outer annular protrusions (6) of the inner tube (1) are decreased progressively.

3. The buckle-type safety hose assembly according to claim 1 or 2, wherein the height of the outer annular projection (6) in the direction of the proximal port of the plurality of outer annular projections (6) is greater than the height of the adjacent outer annular projection (6).

4. A push-on safety hose assembly as claimed in claim 3 wherein said hose is formed from an inner rubber layer (7), an inner fiber cloth layer (8), a support layer (9) comprising a plurality of rubber layers and a plurality of wound steel wire layers, an outer fiber cloth layer (10) and an outer rubber protector layer (11) from the inside to the outside.

5. A snap-on safety hose assembly according to claim 4 wherein the plurality of outer annular protrusions (6) of the inner tube (1) and the plurality of inner annular protrusions (4) of the outer tube (2) are snap-fitted to the inner and outer surfaces of the support layer (9) of the hose, respectively, and the plurality of annular inverted teeth (5) of the inner tube (1) are snap-fitted to the inner rubber layer (7) of the hose.

6. A snap-on hose assembly as claimed in claim 5 wherein the outer tube (2) has an outer annular ring (12) on its inner wall surface adjacent the port, the outer annular ring having a sloping surface which presses against the end of the outer rubber protector (11) of the hose.

7. The buckle-type safety hose assembly according to claim 6, wherein the inner tube (1) has an extension (13) at its end which is extended from the end of the outer tube (2).

8. A snap-on safety hose assembly according to claim 5 wherein the distance between the inner annular bead (4) and the outer annular bead (6) of the inner and outer tubes (1, 2) and the surface of the corresponding support layer (9) of the hose is 1 to 4 mm.

9. The buckling type safety hose assembly according to claim 8, wherein the heights of the plurality of outer annular protrusions (6) of the inner tube (1) and the 3 to 8 inner annular protrusions (4) near the inner end of the outer tube (2) are sequentially decreased by 0.2 to 0.3 mm.

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