CN2481942Y - Connecting pipe fitting for thin wall stainless steel tubing - Google Patents

Abstract

The utility model discloses a connecting pipe fitting used for a thin wall stainless steel pipe fitting, the connecting pipe fitting comprises one or more connecting pipe ends. The cavities in the connecting ends are mutually communicated. The utility model is characterized in that at least one groove is arranged on the outer wall of at least one connecting end, the groove surrounds the pipe wall for one circle, and the longitudinal section of the pipe wall is U shaped. The utility model enlarges the pipe diameter range of the thin wall pipe, increases the connection reliability, because the wall of the used pipe is thin, the utility model saves the material, and is advantageous for the promotion and operation of the stainless steel pipe fitting.

Description

Thin-wall stainless steel tubing connection pipe fitting

The utility model relates to a kind of thin-wall stainless steel tubing connection pipe fitting.

Current thin-wall stainless steel tubing has been applied on the water supply pipe, and the connection between the tubing then is a key factor of its application of restriction.To this, except that complicated traditionally screw thread, welding manner, at present domestic have only a kind ofly introduce Japanese riveting Le Geshi extruding Placement by Jiangsu a company, as shown in Figure 1.Its shortcoming is: 1) it is to be enclosed within outside the tubing with connection pipe fitting, partly seals with the O type of special tool extruding pipe fitting edge protuberance, so just determines that the tubing wall is thick, otherwise, during extruding easily with the tubing compressive strain; And thickness of pipe wall, the tubing cost is just high, also is unfavorable for the popularization of stainless steel drinking water pipe.(2) this Placement is first sealing, and back pressure pipe is fixedly connected.Be applied in the pipe network like this, once tubing and pipe fitting attachment portion are subjected to the external force effect, hermetic unit is earlier stressed, and is loosening thereupon, can occur leaking and polluting.(3) the maximum connection of this Placement diameter is a 65mm tubing, and the tubing bore is far longer than it in the tap water practical application.

The utility model purpose is to reduce and connects difficulty, thereby reduces the Stainless Steel Tube cost, is beneficial to marketing; And be connected firmly, solve tap water secondary pollution problem in pipe network, to improve the water quality of people's potable water.

The utility model realizes that the scheme of above-mentioned purpose is: a kind of thin-wall stainless steel tubing connection pipe fitting, comprise one or more connection pipe ends, the cavity of each connecting end inside interconnects, it is characterized in that: at least one groove is arranged on the outer wall of at least one connecting end, described groove took the shape of the letter U on the tube wall longitudinal section around one week of tube wall.

Adopt the beneficial effect of above scheme: on the connection pipe fitting be not have the projection but fluted, like this, card during means of press seals tubing outside and connection pipe fitting interior, this just greatly reduces the wall thickness requirement to tubing, though the tube wall of connection pipe fitting is thicker, but the length of connection pipe fitting is wanted much shorter compared with tubing, is to have saved material greatly generally.And, connecting with this connection pipe fitting, its good sealing effect is connected firmly.

Fig. 1 is a Placement schematic representation of the prior art.

Fig. 2 is the utility model Placement schematic representation.

Fig. 3 a is the situation schematic representation of the utility model seal area before cassette.

The situation schematic representation that Fig. 3 b is this utility model seal area in cassette is crossed kind.

Fig. 4-the 7th, several concrete connection pipe fitting schematic representation of the utility model.

Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.

Fig. 1 is the situation of prior art, among this figure, earlier tubing 2 is inserted in the pipe fitting 1, and with special tool extruding A district, envelope presses the B district to finish connection more then.Require tubing 2 walls that certain thickness must be arranged like this.Otherwise when extruding A, B two districts, tubing A-B district part meeting modification, seepage.Therefore, increase with the tubing bore, wall thickness increases thereupon.Just run counter to the principle of making thin-wall stainless steel.At present this type of to connect maximum caliber be 65MM, in addition, this type of connection, seal area B outside, connection area A if be subjected to external force effect seal area B earlier stressed, easily produces seepage interior in pipe network, dangerous.

See Fig. 4-7, shown in then be thin-wall stainless steel tubing of the present utility model with connection pipe fitting 1, they all comprise one or more connection pipe ends 11, the cavity of each connecting end 11 inside interconnects, it is characterized in that: on the outer wall of at least one connecting end 11 fluted 12, described groove 12 can be more than one, around one week of tube wall, takes the shape of the letter U on the tube wall longitudinal section.O-ring seal 13 is arranged in groove 12, and the outer surface of described O-ring seal 13 is concordant with the outer surface of connecting end 11, forms card means of press seals district 14.Wherein Fig. 4 is isometrical butt joint pipe fitting, and Fig. 5 is the reducing tee pipe fitting, and Fig. 6 is an equal-diameter elbow spare, and Fig. 7 is pipe close (or claiming pipe cap).Obviously, except these situations, also may be other shapes, as reducing butt joint, equal tee, non-90 degree bend pipes etc.

Between the outer of the connecting end 11 of described groove 12, also has clamp-press type connection area 15.

With groove 12 is boundary, and the external diameter of connecting end 11 outer ends is less than the external diameter of the inner, and the internal diameter of the outside dimension of connecting end 11 outer ends and connected tubing 2 adapts.

Above-mentioned pipe fitting 1 can obtain with the following method: with extruding recessed (U type) groove 12 in common pipe fitting 1 middle part, put into O-ring seal 13 in groove 12, cushion rubber 13 outsides and pipe fitting 1 outer wall level get final product.

During connection, only need operate (see figure 2) as follows: connection pipe fitting 1 is inserted tubing 2 ports, be inserted into groove 12 inboards on the pipe fitting 1, cover O-ring seal 13 and (see Fig. 3 a), with special tool fixedly tubing 2 and pipe fitting 1, block pressure pipe material 2 ports then, extrude concave ring, make the cushion rubber 13 between tubing and the pipe fitting play seal action (seeing Fig. 3 b).Adopt useful such scheme.Can reduce the thickness of tubing 1 greatly, reduce cost, enlarge the connection bore, it is easier, safer that clamp-press type is connected.

Because connection of the present utility model is that pipe fitting 1 is inserted in the tubing 2, card is pressed 15 districts, connection area, seals means of press seals district 14 again and finishes connection.Design can reduce the thickness of tubing 2 greatly, thereby reduce cost like this.The envelope of this kind indent formula is pressed simultaneously, and reliability is pressed greater than the outer convex type envelope of Fig. 1.The tubing that can connect the diameter 12mm-150mm bore of industry requirements such as tap water, medicine, enlarged the using scope of thin walled tube, in addition, among Fig. 2, seal area 14 is interior, and clamp-press type connection area 15 as is subjected to the external force effect outside, can not exert an influence, more increase the reliability of this kind connection envelope nip 14.

In a word, the utility model has solved following technical problem: (1) innovation is complicated screw thread, the welding manner of Stainless Steel Tube tradition in the past, adopts simple clamp-press type to connect.(2) overcome the above-mentioned shortcoming of Japanese riveting Le Geshi, can make the connection of thin-wall stainless steel safer, cost is lower, installs easier.(3) enlarge clamp-press type and connect bore, maximum can connect the tubing of diameter 150mm.

Claims (5)

1, a kind of thin-wall stainless steel tubing connection pipe fitting, comprise one or more connection pipe ends (11), the inner cavity of each connecting end (11) interconnects, it is characterized in that: at least one groove (12) is arranged on the outer wall of at least one connecting end (11), described groove (12) took the shape of the letter U on the tube wall longitudinal section around one week of tube wall.

2, thin-wall stainless steel tubing connection pipe fitting as claimed in claim 1 is characterized in that: O-ring seal (13) is arranged in groove (12), and the outer surface of described O-ring seal (13) is concordant with the outer surface of connecting end (11), forms seal area (14).

3, thin-wall stainless steel tubing connection pipe fitting as claimed in claim 1 or 2 is characterized in that: also have clamp-press type connection area (15) between the outer of the connecting end (11) of described groove (12).

4, thin-wall stainless steel tubing connection pipe fitting as claimed in claim 1 or 2, it is characterized in that: with groove (12) is boundary, the external diameter of connecting end (11) outer end is less than the external diameter of the inner, and the internal diameter of the outside dimension of connecting end (11) outer end and connected tubing (2) adapts.

5, thin-wall stainless steel tubing connection pipe fitting as claimed in claim 3, it is characterized in that: with groove (12) is boundary, the external diameter of connecting end (11) outer end is less than the external diameter of the inner, and the internal diameter of the outside dimension of connecting end (11) outer end and connected tubing (2) adapts.

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