CN2634238Y

CN2634238Y - Double clip pressure type stainless steel pipe

Info

Publication number: CN2634238Y
Application number: CN 03249515
Authority: CN
Inventors: 邱宗贤
Original assignee: MAO DEHONG
Current assignee: MAO DEHONG
Priority date: 2003-07-14
Filing date: 2003-07-14
Publication date: 2004-08-18
Anticipated expiration: 2013-07-14

Abstract

Double clamp type stainless steel fitting is provided with an interface body, an annular shape convex provided at the certain position from the end of the fitting and a seal ring arranged in the groove of the internal hole; the position sidestep for the inserted pipe is provided in the internal hole of the interface body; the through diameter in which the interface body contacts the water is kept same with the connected steel pipe or/and has the smooth transition. During the installation, it is only required to press the double clamps on both sides of the convex by special tool to make both sides of the interface body wall and the steel pipe be deformed and stuck with each other as well as stuck with the seal gasket together, therefore the strength will double increased, compared with the standard single clamp of the existed stainless steel fitting, the seal performance is greatly increased and the pressure can reach to 10Mpa in the pressure test. The interface has the same through diameters in the operation, so the water resistance is not increased and no scale is aggraded to cause the fitting corrosive and affect the water quality. The positioned sidestep can ensure the limit dimension of the steel pipe to be a constant value, so the pipe size can be calculated accurately, the installation is very convenient, the whole structure is quite simple and the expensive stainless steel is consumed less to decrease the cost greatly.

Description

Two jam-on stainless steel pipe fittings

(1) technical field: two jam-on stainless steel pipe fittings belong to engineering element pipe fitting (F16L).

(2) background technique: for human Jiankang, in order to make potable water not because of pipe material for water supply is subjected to secondary pollution, urban construction portion promotes the use of thin-wall stainless steel as water supply line at present.

Existing disclosed thin-wall stainless steel pipe fitting has to adopt in the middle of connecting the steel tube head flange has seal ring, cylindrical to have the loose joint of nut wire ring to tighten structure.Though it is easy to maintenance that this class formation is dismantled, complex structure, the stainless steel materials are many, cost an arm and a leg, and the cost height is difficult to promote the use of.

Urban construction portion has formulated [CJ/T151-2001 book wall Stainless Steel Tube] standard and [CJ/T152-2001 stainless steel clamp-press type pipe] standard, this clamp-press type pipe is simple in structure, cost is low, can be described as [single deck tape-recorder pressure stainless steel pipe], its structure is seen Fig. 1, Fig. 2 pipe fitting connecting body two-port 1.3a establishes annular protrusion 1.1a in the place, be provided with O shape rubber ring 2 in it, after two quilts connect Stainless Steel Tube 3 insertions, see Fig. 2 with the personality card depressor in termination protuberance one side card pressure, the card splenium divides 4a only in two protuberance inboards, annular protrusion is not yielding, O shape rubber ring is not yielding yet, so sealing is poor, holds withstand voltage low.

Chinese patent discloses a kind of [extruding type pipe joint] (ZL00251669) sees and protuberance 1.1b and interior seal ring 2 thereof is housed Fig. 3 on the connecting body 1b that it has a segment distance Xb apart from port one .3b.Also formed [two card pressure] and strengthen sealing when pressing with the special tool card, but this pipe joint has following defective: 1. at the connecting body endoporus, two are connect between steel pipe, the overcurrent latus rectum is variant, be that D1b and D3b are inequality, because of joint overcurrent latus rectum changes, produce water resistance when making work; And the medium and small slag of water easily deposits this place, produces corrosion, influences water quality.2. the connecting body endoporus is not established the positioning step that inserts for steel pipe, makes the definite limited of pipe-line system installation dimension position, influences installation process.

(3) summary of the invention: the utility model is exactly the defective that will solve above-mentioned pipe fitting: complex structure, and the Stainless Steel Tube material use quantity is many, the cost height; Sealing is poor, and water resistance is big, and is perishable etc.Its technological scheme is as follows:

Two jam-on stainless steel pipe fittings, has connecting body 1, establish annular protrusion 1.1 on it, in the groove in the annular protrusion seal ring 2 that shape matches with protuberance is set, the annular protrusion position be connecting body 1 with the inserting section X1 that is connected Stainless Steel Tube 3 within, annular protrusion have apart from the position of connecting body port one .3 certain distance X (for two cards press with); It is characterized in that: the A. annular protrusion is provided with one at each port x place; B. be provided with and connected the positioning step 1.2 that steel tube head matches at the connecting body endoporus; C. in connecting body, the overcurrent latus rectum D1 and the steel pipe 3 overcurrent latus rectum D2 that are connected the non-inserting section X2 of plumbers shed remain unchanged or/and seamlessly transit 1.4c, 1.4d.

Sealing ring material can adopt rubber or copper or other soft metal.Seal ring can adopt O-ring seals.The shape of cross section of annular protrusion can be circular arc or rectangle or trapezoidal, and its corresponding seal ring sectional shape matches with it.

The utility model beneficial effect: 1, simple in structure, cost is low, easy for installation: as only to need to adopt Stainless Steel Tube to connect body with being connected identical material of Stainless Steel Tube and specification, two ends inserting section reaming forms, connected steel pipe and inserted, with special tool card pressure ring shape protuberance both sides, promptly installed at last by the positioning step location.2. adopt connecting body annular protrusion to port that certain distance is arranged, make the annular protrusion both sides pressed by card, promptly two cards are pressed.Join strength doubles between steel pipe and pipe fitting; And because of both sides pressurized easy deformation, see Fig. 5, it is both sides hexagonal shaped 4 or both sides circular arc 5 that the two cards in protuberance both sides are pressed the back; Also extrusion of seal ring in it has improved sealability greatly.When book wall Stainless Steel Tube inside nominal diameter DN was respectively 12～50 (mm) its wall thickness (0.6～1.2), its test pressure reached 8～10MPa.3. the two cards in protuberance both sides are pressed, and the inside and outside tube wall in both sides sticks to one the join strength height.4. the interior overcurrent latus rectum of the interior non-inserting section X2 of connecting body remains unchanged or seamlessly transits, and flowing water does not increase through pipe fitting place water resistance during work, and waterproof slag deposits, corrodes pipe fitting and does not influence water quality.(5) set the position step, making the spacing size of steel pipe is definite value, and pipe sizing calculates accurately easy for installation during installation.

(4) description of drawings:

One of Fig. 1 background technique positive view (stainless steel clamp-press type pipe standard)

Fig. 2 Fig. 1 profile plan view

Two positive views of Fig. 3 background technique

Fig. 4 the utility model embodiment 1 positive view (straight tube spare)

Fig. 5 Fig. 4 profile existing figure that bows

Fig. 6 the utility model embodiment 2 positive views (elbow)

Fig. 7 the utility model embodiment 3 positive views (threeway)

(5) embodiment:

See Fig. 4, two cards are pressed stainless steel straight tube spares, fittings body 1 usefulness with connect the Stainless Steel Tube chambering at two ends of steel pipe 3 and formed with the material same specification.The connecting body two ends are respectively established an annular convex 1.1 and are provided with certain distance X with fittings body port one .3, establish O shape rubber seal 2 in the annular convex inner groovy.Fittings body 1 endoporus is set position step 1.2 and is cooperated the location with insertion steel pipe 3 terminations.And overcurrent latus rectum D1 of this place and pipe diameter D2 remain unchanged.

See Fig. 5, personality card press tool card pressure ring shape protuberance both sides, after this moment, both sides were pressed by two cards, shape deformation was six sides 4, or is garden arc 5, both sides fittings body tube wall and steel pipe, the seal ring etc. of distortion are bonded as one, and improve join strength and sealing.

See Fig. 6, Fig. 7, Stainless Steel Elbow pipe fitting and tee pipe fitting are provided with fittings body 1c, 1d respectively; Seal ring 2; Annular protrusion 1.1c, 1.1d; Protuberance has certain distance Xc, Xd to port one .3c, 1.3d; Positioning step 1.2c, 1.2d; The fittings body endoporus is seen shown in 1.4c, the 1.4d for remaining unchanged and seamlessly transitting by flowing hole in the non-inserting section of 3 of company's steel pipes.

Claims

1. two jam-on stainless steel pipe fittings, has connecting body (1), establish annular protrusion (1.1) on it, in the groove in the annular protrusion seal ring (2) that shape matches with protuberance is set, the annular protrusion position is located at connecting body (1) and connects within the inserting section (X1) of Stainless Steel Tube (3) with quilt, and annular protrusion has certain distance (X) apart from the position of connecting body port (1.3); It is characterized in that the A. annular protrusion locates to be provided with one apart from each port (X) on connecting body; B. be provided with and connected the positioning step (1.2) that steel tube head matches at the connecting body endoporus; C. in connecting body, the overcurrent latus rectum (D1) that is connected the non-inserting section (X2) between steel pipe remains unchanged with steel pipe (3) overcurrent latus rectum (D2) or/and seamlessly transit (1.4c), (1.4d).

2. by the described pipe fitting of claim 1, it is characterized in that sealing ring material adopts rubber or copper or other soft metal.

3. by the described pipe fitting of claim 1, it is characterized in that seal ring adopts O-ring seals.

4. by the described pipe fitting of claim 1, the shape of cross section that it is characterized in that annular protrusion is circular arc or rectangle or trapezoidal, and its seal ring shape matches with it.