CN2460832Y

CN2460832Y - Internal conical surface cutting-sleeve type stainless steel compound tube joint

Info

Publication number: CN2460832Y
Application number: CN 00268474
Authority: CN
Inventors: 应宝庆
Original assignee: Shanghai Day Stainless Steel Composite Pipe Co Ltd; Shanghai New Technology Research Institute Of Eddie
Current assignee: Shanghai Day Stainless Steel Composite Pipe Co Ltd; Shanghai New Technology Research Institute Of Eddie
Priority date: 2000-12-29
Filing date: 2000-12-29
Publication date: 2001-11-21
Anticipated expiration: 2010-12-29

Abstract

The utility model relates to a stainless steel compound tube joint device of internal conical surface cutting-sleeve type, which is sheathed out of the compound tube, used for connecting tubes and composed of a fitting body, a cutting sleeve and nuts which are matched and combined. The utility model is characterized in that the outer wall of the fitting body is provided with external threads, and an internal conical surface with a small inner diameter and a big outer diameter is formed on the inner wall of the port on the external side of the fitting body; outer cambered surfaces are formed on both side ends of the cutting sleeve; the outer cambered surface at one end and the internal conical surface of the fitting body are tangential; the inner wall of the nut is provided with internal threads with the same dimension to the external threads on the outer wall of the fitting body, and an internal conical surface is formed on the inner wall at the back of the nuts, while the outer cambered surface on the other end of the cutting sleeve and the internal conical surface on the inner wall at the back of the nuts are tangential.

Description

Inner conical surface FERRULETYPE stainless steel composite pipe link

The utility model relates to a kind of pipe connection, relates in particular to a kind of inner conical surface FERRULETYPE stainless steel composite pipe link that can satisfy strong hydraulic pressure and high leak tightness pleasure.

Raising along with living standards of the people, requirement to the environment-friendly quality of aqueduct also improves thereupon, requirement provides high-quality stainless steel composite pipe as conduit pipe, to reduce the pollution of conduit pipe to water, requires corresponding water pipe link to be used with it thus.But, because outer hardness height of the stainless steel of composite pipe and tube wall are thinner, make it to be applied on being connected of composite pipe with the various forms of tubular union of the matching used prior art of composite pipe, cause the reason of this phenomenon to be, one, the material of prior art pipe joint can not satisfy the requirement of stainless steel composite pipe characteristic, they are two years old, because the incomplete defective of sealability of its structure, make the tubular union of prior art be difficult to satisfied the be higher than join strength that is higher than 6.4Mpa hydraulic pressure of stainless steel composite pipe and the requirement of sealability, therefore often occur because when hydraulic pressure is higher, the pipe joint place is infiltration just, even produce problem such as break, and influenced daily life and production, wasted the water of a large amount of preciousnesses again.

The purpose of this utility model is to provide a kind of improved inner conical surface FERRULETYPE stainless steel composite pipe link, and it can not only make things convenient for and properly connects stainless steel composite pipe, and can bear higher hydraulic pressure and reach strict seal request.

The purpose of this utility model is achieved in that

A kind of inner conical surface FERRULETYPE stainless steel composite pipe link is used for the connection of pipe, and it is set in outside the connected composite pipe, is formed a complete set of by fittings body, cutting ferrule, nut; Be characterized in:

Described fittings body outer wall is provided with outside thread, forms the inner conical surface that inner diameter is little, outer diameter is big on the inwall of this fittings body outside port; The two side ends of described cutting ferrule forms outer arced surface, and cutting ferrule one end outer arced surface and fittings body inner conical surface are tangent; Be provided with on the inwall of described nut with the fittings body outer wall on the internal thread of outside thread same size, on this nut rear inwall, form an inner conical surface, described cutting ferrule the other end outer arced surface is tangent with the inner conical surface on the nut rear inwall.

In above-mentioned inner conical surface FERRULETYPE stainless steel composite pipe link, wherein, the described inner conical surface angle α that is arranged on the port inner wall of the fittings body outside ₁Angular range 40 the degree to 50 the degree between.

In above-mentioned inner conical surface FERRULETYPE stainless steel composite pipe link, wherein, curved of the outer surface of described cutting ferrule, its ancient piece of jade, round, flat and with a hole in its centre is thick to be between 1 to 1.5 millimeter.

In above-mentioned inner conical surface FERRULETYPE stainless steel composite pipe link, wherein, the described radius R that is arranged on the outer arced surface of cutting ferrule two side ends is between 0.8 to 1.2 millimeter.

In above-mentioned inner conical surface FERRULETYPE stainless steel composite pipe link, wherein, the described angle α that is arranged on the inner conical surface on the inwall of the nut outside ₂Angular range 45 the degree to 55 the degree between.

The utility model inner conical surface FERRULETYPE stainless steel composite pipe link makes it compared with prior art owing to adopted above-mentioned technological scheme, has following advantage and good effect:

1. the utility model is owing to be arranged to the inner conical surface form with fittings body, and the two ends of cutting ferrule are arranged to the outer arced surface that matches with the fittings body inner conical surface, and the nut setting is the inner conical surface that matches with the cutting ferrule outer arced surface, also closely coincide together thereby cutting ferrule is embedded between fittings body and the nut, therefore increased the seal request of link itself with fittings body and nut;

2. the utility model is owing to be arranged on fittings body inner conical surface angle between 40 to 50 degree, and the inner conical surface angle of nut is arranged between 45 to 55 degree, makes it intensity and reaches more than the 10Mpa;

3. the utility model is owing to 1 ± 0.2 millimeter of cutting ferrule two ends outer arced surface radius R, its position that contacts with the conical surface of fittings body or nut is the closed circle that the point of contact forms, under the identical condition of screw thread screw-down torque, during its identical conical surface driving fit with two, little and the pressure height of area of contact, thus better sealability obtained;

4. the utility model is not because an inner conical surface that forms on the nut rear inwall extends to outboard end, therefore the cutting ferrule that is positioned at it can be connected nearly with nut with fittings body, thereby cutting ferrule is because therefore the position of becoming flexible before and after not having has increased the performance that seals again;

5. therefore the utility model can apply axial power to cutting ferrule because the cutting ferrule outer surface is arranged to arc shaped surface, cutting ferrule can radial contraction be out of shape, and be absorbed in the appropriate depth of the Stainless Steel Tube body that is positioned at it, thereby strengthen join strength and sealability.

By the description of the following embodiment that the utility model inner conical surface FERRULETYPE stainless steel composite pipe is connected, can further understand the purpose of this utility model, specific structural features and advantage in conjunction with its accompanying drawing.Wherein, accompanying drawing is:

Fig. 1 the structural representation that connects according to the inner conical surface FERRULETYPE stainless steel composite pipe that the utility model proposes;

Fig. 2 is the structural representation of Fig. 1 middle joint body;

Fig. 3 is the structural representation of cutting ferrule among Fig. 1;

Fig. 4 is the structural representation of nut among Fig. 1.

As shown in Figure 1, the utility model inner conical surface FERRULETYPE stainless steel composite pipe link is used for the connection between the pipe, and it is set in outside the connected composite pipe 1, by the use that forms a complete set of of fittings body 10, cutting ferrule 20, nut 30.

See also Fig. 1 and shown in Figure 2, described fittings body 10 is to be set in outside connected stainless steel composite pipe 1 tube wall when connecting, so shape round tube shape identical of fittings body 10 with the stainless steel composite pipe shape, the outer wall of fittings body 10 is provided with outside thread 11, be used for and being spirally connected of nut 30, form inner conical surface 12 on the inwall of fittings body 10 ports, it is little and inner conical surface 12 that opening that outer diameter is big is outside forms inner conical surface 12 angle α thus that this inner conical surface 12 is inner diameter ₁, this angle α ₁Angular range 40 the degree to 50 the degree between be suitable, in the utility model, angle α ₁Angle be 45 the degree.

See also Fig. 1 and shown in Figure 3, described cutting ferrule 20 is arranged between fittings body 10 and the nut 30, cutting ferrule 20 is selected the stainless steel material of approximate composite pipe chemical composition for use, what replace that the prior art cutting ferrule adopts is materials such as steel, copper, nylon, three problems that the prior art cutting ferrule exists have been solved thus, promptly, chemical corrosion and potential difference burn into be because of cutting ferrule and the lower combination force deficiency that causes of composite pipe friction factor, makes it to be easy to generate when circumstance of temperature difference changes greatly problems such as seepage because of cutting ferrule and composite pipe expansion coefficient are inconsistent; 21 curved of the outer surfaces of cutting ferrule 20, its ancient piece of jade, round, flat and with a hole in its centre is thick to be between 1 to 1.5 millimeter, the two side ends of cutting ferrule 20 forms outer arced surface 22, the radius R of this outer arced surface 22 is between 0.8 to 1.2 millimeter, in the utility model, radius R is 1 ± 0.2 millimeter, and cutting ferrule 20 one end outer arced surface 22 are tangent with fittings body 10 inner conical surfaces 12.

See also Fig. 1 and shown in Figure 4, described nut 30 is to be arranged in outside cutting ferrule 20 and the fittings body 10, therefore be provided with on the inwall of nut 30 with fittings body 10 outer walls on the internal thread 31 of outside thread 11 same sizes, internal thread 31 is arranged on the front middle part section of nut 30, and on these nut 30 rear inside wall, forming an inner conical surface 32, described cutting ferrule 20 the other end outer arced surface 22 are tangent with the inner conical surface 32 on nut 30 rear inside wall; Little greatly outward in inner conical surface 32 is is the big inside shape of opening, forms the angle α of inner conical surface 32 thus ₂, this angle α ₂Angular range 45 the degree to 55 the degree between comparatively suitable, this angle α in the utility model ₃Angle be 50 the degree; In addition, form an inner conical surface 32 and do not extend to outboard end on nut 30 rear inside wall, institute is so that be positioned at the position that its cutting ferrule becomes flexible before and after not having, and can be connected with nut with fittings body nearly, increased the performance that seals so again; And, when outside nut 30, cutting ferrule 20, fittings body 10 are set in connected composite pipe 1 successively, giving threaded together, cutting ferrule 20 two side ends outer arced surface 22 are subjected to the active force of fittings body 10 inner conical surfaces 12 and the reaction force of nut 30 inner conical surfaces 32 simultaneously, because the angle effect of the conical surface, produced the radial effect power of central direction again simultaneously, force 22 contraction deformations of cutting ferrule 20 two side ends outer arced surface, be absorbed in the body appropriate depth, thereby obtain join strength and sealability.

In sum, the utility model inner conical surface FERRULETYPE stainless steel composite pipe link is owing to designed the new geometrical shape that fittings body, cutting ferrule closely are linked in nut, improved the cutting ferrule structure and material, the sealability, decay resistance and the join strength that have increased link itself are therefore very practical.

Claims

1. an inner conical surface FERRULETYPE stainless steel composite pipe link is used for the connection of pipe, and it is set in outside the connected composite pipe (1), is formed a complete set of by fittings body (10), cutting ferrule (20), nut (30); It is characterized in that:

Described fittings body (10) outer wall is provided with outside thread (11), forms the inner conical surface (12) that inner diameter is little, outer diameter is big on the inwall of this fittings body (10) outside port;

The two side ends of described cutting ferrule (20) forms outer arced surface (22), and cutting ferrule (20) one end outer arced surface (22) is tangent with fittings body (10) inner conical surface (12);

Be provided with on the inwall of described nut (30) with fittings body (10) outer wall on the internal thread (31) of outside thread (11) same size, form an inner conical surface (32) on this nut (30) rear inside wall, described cutting ferrule (20) holds outer arced surface (22) tangent with the inner conical surface (32) on nut (30) rear inside wall in addition.

2. a kind of inner conical surface FERRULETYPE stainless steel composite pipe link as claimed in claim 1 is characterized in that: described inner conical surface (12) the angle α that is arranged on the port inner wall of fittings body (10) outside ₁Angular range 40 the degree to 50 the degree between.

3. a kind of inner conical surface FERRULETYPE stainless steel composite pipe link as claimed in claim 1 is characterized in that: curved of the outer surface (21) of described cutting ferrule (20), its ancient piece of jade, round, flat and with a hole in its centre is thick to be between 1 to 1.5 millimeter.

4. a kind of inner conical surface FERRULETYPE stainless steel composite pipe link as claimed in claim 1 is characterized in that: the described radius R that is arranged on the outer arced surface (22) of cutting ferrule (20) two side ends is between 0.8 to 1.2 millimeter.

5. a kind of inner conical surface FERRULETYPE stainless steel composite pipe link as claimed in claim 1 is characterized in that: the described angle α that is arranged on the inner conical surface (32) on the inwall of nut (30) outside ₂Angular range 45 the degree to 55 the degree between.