CN210978881U - Buckling type safety hose joint - Google Patents

Abstract

The utility model discloses a withhold formula safety hose nipple. Including inner tube (2) that have link (1), especially outer tube (3) cover establish the outer and near link (1) department threaded connection of one end of outer tube (3) and inner tube (2) of inner tube (2) outside inner tube (2), form the annular cavity of a centre gripping hose end portion between inner tube (2) and outer tube (3), the internal wall of outer tube (3) has a plurality of interior annular convex parts (4) that distribute in succession, the outer surface near-end oral area of inner tube (2) is a plurality of annular pawl (5) and 3 ~ 10 annular outer convex parts (6) near the inner, the height that highly is less than annular outer convex part (6) of annular pawl (5). The utility model discloses the tensile of hose assembly, high pressure resistant and the comprehensive properties of preventing leaking have been improved by a wide margin, and the cost of preparation reduces by a wide margin.

Description

Buckling type safety hose joint

The technical field is as follows:

the present invention relates to a joint of a hose for transporting liquid, and more particularly to a buckle-type metal joint at the end of a hose.

Background art:

the metal joint at the end part of the buckling-pressing type hose is a joint commonly used for conveying high-pressure liquid, and the general structure of the joint is that an inner pipe is provided with a connecting part, an outer pipe is sleeved outside the inner pipe and the outer pipe, annular inverted teeth are arranged on opposite wall surfaces of the inner pipe and the outer pipe, and the hose is clamped by the inner pipe and the outer pipe after the outer pipe is radially deformed by applying pressure to the outer pipe, so that the connection between the hose and the metal joint. When the hose is subjected to external tensile force, the clamped hose is subjected to axial deformation and radial deformation, and the radial deformation can generate a gap between the hose and the inner pipe and the outer pipe of the metal joint, so that liquid leakage can be generated, the biting force and the friction force between the hose and the inner pipe and the outer pipe can be reduced, the hose is easy to separate from the metal joint, and serious accidents can be caused, even serious accidents of personal injury can occur. Therefore, overcoming the above-mentioned drawbacks of the prior art is a problem that is urgently to be solved by the industry or petroleum industry.

The invention content is as follows:

the invention aims to disclose a buckling-pressing type safety hose joint which is simple in structure, can resist high pressure and high-strength stretching.

Realize the utility model discloses a technical solution is: including the inner tube that has the link, the key is that the outer tube cover is established including the outside of tubes and the one end of outer tube and the nearly link department threaded connection of inner tube, but forms the annular cavity of a centre gripping hose end portion between inner tube and the outer tube, and the internal face of outer tube has a plurality of continuous distribution's interior annular convex part, and the outer surface near-end oral area of inner tube is 3 ~ 10 annular outer convex parts of a plurality of annular pawl and nearly inner, and the height of annular pawl is less than the height of annular outer convex part.

The height of the annular outer convex part closest to the annular inverted tooth in the 3-10 annular outer convex parts is larger than that of the adjacent annular outer convex part.

The height of the annular convex part of the inner pipe from the inner end to the port direction is gradually reduced.

Among the inner annular convex parts which are continuously distributed in the outer pipe, the heights of 3-10 inner annular convex parts in the direction from the inner end to the port are gradually reduced.

The annular outer convex parts of the inner pipe and the inner annular convex parts of the outer pipe at corresponding positions are arranged in a staggered mode.

The rear end of the inner pipe is provided with an extension end with the length larger than that of the outer pipe.

The side wall of the outer pipe is provided with at least one through hole.

The heights of the annular outer convex parts and/or the annular inner convex parts are sequentially decreased by 0.15-0.25 mm.

The utility model discloses a withhold formula safety hose connector's inner tube and outer tube constitute by metal material, behind the end of inside and outside pipe centre gripping hose, apply external force to the outer pipe wall face, make the outer tube to the inseparable centre gripping hose constitution hose assembly of axle center radial contraction deformation back. Because made unique structural design to foretell inner tube and outer tube, make the interlock of joint to the hose increase by a wide margin, receive tensile external force and the breaking away from that produces to the hose simultaneously and set up multiple friction resistance face and increase the prevention position that the hose warp, and then improved the tensile resistance of hose assembly by a wide margin, high pressure resistant and prevent the comprehensive properties of leaking, make the utility model discloses can be used to high pressure, high tensile force's work, and the cost of manufacture reduces by a wide margin.

Description of the drawings:

fig. 1 is a schematic sectional view of the inner tube of the present invention.

Fig. 2 is a schematic sectional view of the outer tube of the present invention.

Fig. 3 is a schematic sectional view of the assembled inner and outer tubes and hose of the present invention.

The specific implementation mode is as follows:

the detailed description of the embodiments of the present invention is given in detail with reference to the accompanying drawings, and it should be noted that the detailed description of the embodiments is provided for the purpose of facilitating the 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 3, the technical solution of the embodiment of the present invention is: the hose connecting structure comprises an inner tube 2 with a connecting end 1, the key is that an outer tube 3 is sleeved outside the inner tube 2, one end of the outer tube 3 is in threaded connection with the position, close to the connecting end 1, of the inner tube 2, an annular cavity capable of clamping or accommodating the end of a hose is formed between the inner tube 2 and the outer tube 3, the connecting end 1 is connected with joints or other parts of other hoses, the connecting end 1 is in the prior art, various structures in the prior art can be selected for use, detailed description is omitted, the inner wall surface of the outer tube 3 is provided with a plurality of inner annular convex parts 4 which are continuously distributed, the near-end opening part of the outer surface of the inner tube 2 is provided with a plurality of annular inverted teeth 5 and 3-10 annular outer convex parts 6 close to the inner end, and the height of. The inner end refers to the innermost end of the annular cavity, the other end is a port part or also called an outer end, when actually manufacturing the hose assembly, a hose end part is arranged in the annular cavity of the inner and outer pipes (2, 3), a circumferential centripetal external force is applied to the surface of the outer pipe 3, the outer pipe 3 is wholly contracted towards the axial direction, finally a plurality of inner annular convex parts 4 on the inner wall surfaces of the inner and outer pipes (2, 3) are pressed on the outer surface of the hose, a mutually embedded part is formed between the inner annular convex parts and the outer annular convex part or a continuous convex-concave surface is formed between the inner annular convex parts and the outer annular inverted teeth, a plurality of continuous convex-concave surfaces and tooth-shaped surfaces which are mutually embedded are formed between the inner annular convex parts 6 and the annular inverted teeth 5 of the inner pipe 2 and the inner surface of the hose, and the contact surfaces of the hose and the inner and the, the inner and outer surfaces of the hose have different structures of resistance surfaces, so that the metal joint is tightly connected with the hose, and the connection strength is high, particularly, the inner annular convex part 4 and the annular outer convex part 6 are embedded into the hose to be deeper and are directly extruded or embedded with a main supporting part with a steel wire winding layer in the hose (shown in figure 3), so that the metal joint plays the role of a main resistance surface. The annular inverted teeth 5 of the inner tube 2 and the inner surface of the hose form a resistance surface which is embedded with each other, and a sealing effect is also achieved due to the fact that the annular inverted teeth are mainly pressed and embedded with the rubber surface of the hose. Therefore, foretell the utility model discloses have good comprehensive properties, preparation technology greatly simplifies simultaneously, and the cost of manufacture reduces by a wide margin, and resistance to compression, stretch-proofing and prevent that the leakage performance reaches or surpasss current high-pressure hose assembly.

In order to further improve the resistance of the hose joint to the hose or the connection strength between the hose joint and the hose, the height of the annular convex part 6 closest to the annular inverted tooth 5 in the 3-10 annular convex parts 6 is larger than that of the adjacent annular convex part 6; after the actual hose connector is connected to the hose, the annular convex portion 6 closest to the annular inverted tooth 5 forms a narrow opening through which the internally held hose must pass to disengage from the hose connector, which results in that the portion of the hose must overcome more resistance or must deform itself more to pass through the narrow opening, i.e., the above-described structure improves the strength of the connection between the hose and the hose connector.

Similarly, in order to improve the connection strength between the hose and the hose joint, the height of the annular convex part 6 of the inner pipe 2 is gradually reduced from the inner end to the end port, after the actual hose joint is connected with the hose, the structure ensures that the clamped part of the hose is more stressed and deformed more and the connection strength is more, the outer pipe 3 is deformed to the axial direction under the action of external force except the increased connection strength, the deformation of the part of the outer pipe 3 close to the threaded connection position of the inner pipe (2) and the outer pipe (3) is limited by the threaded connection part and slightly reduced, and the structure ensures that the extrusion force of the inner pipe (2) and the outer pipe (3) to the end part of the hose is not reduced under the condition of slightly reduced deformation, thereby ensuring the improvement of the connection strength between the hose and the hose joint.

In order to further improve the connection strength between the hose connector and the hose, among the plurality of inner annular convex parts 4 continuously distributed in the outer pipe 3, the heights of 3-10 inner annular convex parts 4 in the direction from the inner end to the port are gradually reduced, that is, the height of the inner annular convex part 4 close to the innermost end is the maximum, and the action of the inner annular convex part 4 on the hose is the same as that of the annular outer convex part 6 described in the previous natural section, so that the pressing and extruding force of the inner annular convex part 4 on the hose is improved, and the connection strength between the hose connector and the hose is further improved.

Still in order to improve the joint strength of the hose joint and the hose, the annular outer convex parts 6 of the inner pipe 2 and the inner annular convex parts 4 of the corresponding positions on the outer pipe 3 are arranged in a staggered mode, the structure enables the wall surface of the compressed hose to form a continuous S-shaped structure, more bending or bending parts are formed on the wall surface of the hose or the supporting layer with the steel wire winding layer inside the hose, when the hose is stretched by external force, the hose can be separated from the restraint or limitation of the inner pipe (2) and the outer pipe (3) only by overcoming larger resistance or generating larger deformation per se, and the tensile resistance of the hose assembly is necessarily improved.

In various tests on the hose assembly composed of the hose joint and the hose of the above structure, it was found that the leakage occurred mainly at the proximal end portion, and when the hose assembly was actually used, the hose inevitably suffered from the conditions of swinging, vibration or large bending, etc., in which the outer surface of the hose and the rear end portion of the outer tube 3 were stress points, and when the hose itself was not constrained by the inner and outer tubes (2, 3), the hose itself was deformed to be slightly flat, which caused the clearance or partial separation of the hose and the ports of the inner and outer tubes (2, 3), which adversely affected the sealing between the hose and the hose joint, and therefore the rear end of the inner tube 2 had an extended end 7 having a length longer than that of the outer tube 3, which caused the position of the action of the hose due to the swinging, vibration or bending to be transferred to the port of the extended end 7 of the inner tube 2, the occurrence of the aforementioned drawbacks is avoided and leakage of liquid is prevented.

In order to improve the comprehensive performance of the hose connector and the hose, at least one through hole 8 is formed in the side wall of the outer pipe 3, the through hole 8 enables the outside to be communicated with the annular cavity, after the hose connector and the hose shown in fig. 3 are assembled, the outer pipe 3 can be directly buckled and pressed to enable the outer pipe 3 to deform, high-strength adhesive can be injected through the through hole 8 before buckling and pressing, or high-strength adhesive can be injected through the through hole 8 under pressure after buckling and pressing, and therefore the connection strength of the hose connector and the hose and the leakage prevention performance can be further improved.

When the heights of the annular outer convex parts 6 and the inner annular convex parts 4 are in a descending state, in order to ensure the assembly and the connection strength between the hose and the hose joint, the heights of the annular outer convex parts 6 and/or the inner annular convex parts 4 are sequentially reduced by 0.15-0.25 mm, so that the ascending of the internal extrusion force is ensured, and the proper gap is also ensured to ensure the assembly.

Claims (8)

1. The utility model provides a withhold formula safety hose connector, including inner tube (2) that have link (1), its characterized in that outer tube (3) cover is established outside inner tube (2) and the one end of outer tube (3) and the nearly link (1) of inner tube (2) department threaded connection, but form the annular cavity of a centre gripping hose end portion between inner tube (2) and outer tube (3), the internal face of outer tube (3) has a plurality of inner ring shape convex parts (4) that distribute in succession, the outer surface near-end oral area of inner tube (2) is a plurality of annular pawl (5) and 3 ~ 10 annular outer convex parts (6) of nearly inner, the height that highly is less than annular outer convex part (6) of annular pawl (5).

2. The buckle-type safety hose connector according to claim 1, wherein the height of the annular protrusion (6) closest to the annular inverted tooth (5) among the 3 to 10 annular protrusions (6) is greater than the height of the adjacent annular protrusion (6).

3. The buckle-type safety hose connector according to claim 1, wherein the height of the annular protrusion (6) of the inner tube (2) decreases from the inner end to the end opening.

4. The buckling-type safety hose coupler as claimed in claim 1, 2 or 3, wherein the height of 3-10 inner annular protrusions (4) in the direction from the inner end to the port decreases progressively among the plurality of inner annular protrusions (4) continuously distributed in the outer pipe (3).

5. The buckle-type safety hose connector according to claim 4, wherein the plurality of annular protrusions (6) of the inner tube (2) and the plurality of inner annular protrusions (4) of the outer tube (3) at corresponding positions are offset from each other.

6. The buckle-type safety hose connector according to claim 5, wherein the rear end of the inner tube (2) has an extended end (7) having a length greater than that of the outer tube (3).

7. The buckle-type safety hose connector according to claim 6, wherein the outer tube (3) has at least one through hole (8) in its side wall.

8. The buckling-type safety hose coupler according to claim 5, 6 or 7, wherein the heights of the annular outer convex portions (6) and/or the inner annular convex portions (4) are sequentially decreased by 0.15-0.25 mm.

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