CN1295210A

CN1295210A - Pipe joint

Info

Publication number: CN1295210A
Application number: CN00117638A
Authority: CN
Inventors: 池田浩二; 进藤孝彦; 山田晃; 石田尚树
Original assignee: KITAMURA GOKIN SEISAKUSHO
Current assignee: KITAMURA GOKIN SEISAKUSHO; Kitamura Alloy Manufacturing Co Ltd
Priority date: 1999-10-28
Filing date: 2000-05-18
Publication date: 2001-05-16
Anticipated expiration: 2020-05-18
Also published as: CN1143070C; JP3600764B2; KR20010039552A; KR100366129B1; JP2001124258A

Abstract

In the pipe joint in which a joint body 1 is provided with a cylindrical guide part 8, a groove hole 9 is formed in an outer circumferential surface of the guide part, a seal member 10 to be closely attached to the groove hole 9, a ring 18 is interposed between a cap nut 14 and the guide part 8, the resin connection pipe 22 is inserted from an opening part 17 of the cap nut 14, a guide ring 11 to cover the seal member 10 is externally fitted to the outer circumference of the guide part 8, and the guide ring 11 slides the guide part 8 while uniformly pressing the outer circumferential surface of the seal member 10 in a condition held by the inner circumferential surface of the connection pipe 22 and the outer circumferential surface of the guide part 8 when the connection pipe 22 is inserted from the opening part 17 of the cap nut 14.

Description

Pipe joint

The present invention relates to a kind of if insert be used to supply water, the connecting tube of heat supply water etc. just can form the pipe joint of connection.

Illustrated among Fig. 5,6 a kind of existing if insert be used to supply water, plug-in type pipe joint that the connecting tube of heat supply water etc. just can form connection and be not easy to extract.When carrying out simple declaration according to Fig. 5,6, pipe joint 30 is by having the sleeve pipe 31 that allows the sleeve 32 that connecting tube 38 inserts, be contained in Sealing 34 in the slotted eye 33 that takes shape on sleeve 32 peripheries, be formed with in sleeve pipe 31 inboards towards the circle 35 of the groove 36 of nipping of sleeve 32 and the cap 37 that is used for fastening ring 35 and constitute, when after being screwed to cap 37 on the sleeve pipe 31, connecting tube 38 being inserted between sleeves 32 and the cap 37, enclose 35 the groove 36 of nipping and nip on the outer circumferential face of connecting tube 38 and fixed.

In the aforementioned tube joint, when connecting tube is inserted between sleeve and the cap, or under the state of the relative sleeve axioversion of connecting tube, peg graft as illustrated in fig. 7, or when not having vertically to cut off the connecting tube of front-end face when pegging graft as illustrated in fig. 8, the connecting tube front end has been uncovered the outer circumferential face of Sealing, cause Sealing damage or cut-out, so exist the problem that causes poor sealing and leak, operability and reliability are not proper.

As long as the objective of the invention is will be used for supplying water, the connecting tube of heat supply water etc. inserts the pipe joint that just can couple together, and successfully realizes insertion and the raising operability and the water-proof performance of connecting tube.

Technological scheme 1 of the present invention is a kind of pipe joint, wherein adapter body has connecting tube is embedded in cylindric guide portion on the inboard of the convex thread portion that takes shape on the periphery outward, this guide portion is formed with slotted eye on outer circumferential face, the Sealing of tight contact connecting tube inner peripheral surface is installed in slotted eye, be provided with circle being screwed between acorn nut in the above-mentioned convex thread portion and the guide portion, resinous connecting tube is inserted from the opening portion of acorn nut, can be connected on the adapter body by the outer side face of circle extruded joint pipe, be embedded with the guide ring that can cover Sealing outside on the periphery of above-mentioned guide portion, this guide ring is sandwiched in when connecting tube is inserted from the acorn nut opening portion between the outer circumferential face of the inner peripheral surface of connecting tube and guide portion, and slide on guide portion in the outer circumferential face limit of the even squeeze sealing member in limit thus.

In technological scheme 2, above-mentioned guide ring is by being embedded in the cylindrical part on the guide portion outer circumferential face outward and constituting with the lip part of connecting tube front end butt.

The present invention is a kind of pipe joint, wherein adapter body has connecting tube is embedded in cylindric guide portion on the inboard of the convex thread portion that takes shape on the periphery outward, this guide portion is formed with slotted eye on outer circumferential face, the Sealing of tight contact connecting tube inner peripheral surface is installed in slotted eye, be provided with circle being screwed between acorn nut in the above-mentioned convex thread portion and the guide portion, resinous connecting tube is inserted from the opening portion of acorn nut, can be connected on the adapter body by the outer circumferential face of circle extruded joint pipe, owing to be embedded with the guide ring that can cover Sealing outside on the periphery of above-mentioned guide portion, this guide ring is sandwiched in when connecting tube is inserted from the acorn nut opening portion between the outer circumferential face of the inner peripheral surface of connecting tube and guide portion, slide on guide portion in the outer circumferential face limit of the even squeeze sealing member in limit thus, so, even the front-end face of connecting tube cuts into skewed or connecting tube when tilting when the opening portion by acorn nut inserts connecting tube in the adapter body, guide ring is the outer circumferential face of squeeze sealing member equably also, Sealing can not started distortion, can successfully insert, can promptly manage the connection operation, and eliminate the possibility of leaking that causes because of unreasonable connection.

By just significantly improving operability and reliability on the guide portion that only guide ring is embedded into existing pipe joint outward.

The longitudinal sectional view of Fig. 1 when to be connecting tube received before the pipe joint.

Fig. 2 is the longitudinal sectional view in connecting tube and the pipe joint connection procedure.

Fig. 3 is the longitudinal sectional view of connecting tube when being connected on the pipe joint.

Fig. 4 is the exploded perspective view of pipe joint.

Fig. 5 is the longitudinal sectional view in existing connecting tube and the pipe joint connection procedure.

Fig. 6 is the longitudinal sectional view of connecting tube when being connected on the existing pipe joint.

The connecting tube that Fig. 7 shows Fig. 5 is plugged into the situation in the pipe joint under heeling condition.

Fig. 8 shows and front-end face among Fig. 5 is cut into skewed connecting tube is plugged into situation in the pipe joint.

Below, describe embodiments of the invention with reference to the accompanying drawings in detail.

Pipe joint A of the present invention such as Fig. 1-shown in Figure 4 have adapter body 1 that band roughly becomes the guide portion 8 of columnar and outer embedding connecting tube 22, are screwed in acorn nut 14 on the adapter body 1, are arranged on the circle 18 between acorn nut 14 and the adapter body 1 and are embedded in guide ring 11 on the guide portion 8 outward.

As shown in Figure 1, 2, adapter body 1 roughly becomes cylindric and upwards having formed flow of hot water threads a pipe 2 with connecting at inner shaft, fix it for utilizing fastened tools such as spanner, on the end periphery of its outer circumferential face, formed the joint 6 that links to each other with other joint, on the periphery of the other end, formed the convex thread portion 7 slightly thicker than joint 6 for for example instrument hooking part 3 of hexagonal shape.

On the interior week of convex thread portion 7, be provided with the cylindric guide portion 8 thinner than connecting tube 22 according to predetermined interval, the front end of guide portion 8 is exposed at the front of convex thread portion 7, on the front end of outer circumferential face, axially be formed with the slotted eye 9,9 of annular side by side, the

identical Sealing

10,10 of shape has been installed respectively in slotted eye 9,9.In addition, slotted eye and Sealing can only have one, but a plurality of performance of watertightness that improved are set.

Sealing 10 leaks and is detained the foreign matter that sticks on connecting tube 22 inner peripheral surfaces and is made by the rubber elastomeric material for preventing, when being embedded on the guide portion 8 outside guide ring 11 and the connecting tube 22, Sealing 10,10 distortion are played seal action with connecting tube 22 inner peripheral surfaces tight contact the in waterproof ground thus.

Above-mentioned guide ring 11 as shown in Figure 4, be can cover the long cylinder portion 12 that is contained in a Sealing 10 on guide portion 8 outer circumferential faces and constitute than the lip part 13 that cylindrical part slightly slightly forms at ora terminalis place towards guide portion 8 front ends by length, and outer sliding freely being embedded on the periphery of guide portion 8.And, as shown in Figure 2, when lip part 13 contacted the end face of connecting tubes 22, the inner peripheral surface of cylindrical part 12 closely contacted with the outer circumferential face of Sealing 10, and when inserting connecting tube 22, lip part 13 is as illustrated in fig. 3 on the retainer 4 of adapter body 1 and stop.

Acorn nut 14 forms the internal thread part 15 in the convex thread portion 7 be screwed in adapter body 1 in the inner peripheral surface ingress, formed towards the diminishing conical surface 16 of opening portion 17 diameters that inserts connecting tube 21 at the most end of internal thread part 15.

Circle 18 is inserted into the inboard of the conical surface 16 in the acorn nut 14, and as shown in Figure 4, on an axial part, formed seam 19, circle 18 diameter can enlarge and dwindle, the concave-convex shape that is formed with the conical surface 20 that is easy to insert connecting tube 22 and extruding, connecting tube 22 outer circumferential faces of nipping within it on the side face groove 21 of nipping.Therefore, owing to circle 18 enlarged-diameter when inserting connecting tube 22 is easy among the insertion tube joint A, when applying the active force that connecting tube 22 is extracted from pipe joint A, circle 18 reduced, the groove 21 of nipping is nipped dearly in the outer circumferential face of connecting tube 22 and can not be extracted.

Connecting tube 22 is made by resins such as polypropylene, polyethylene, and it is inserted between the guide portion 8 of adapter body 1 and the acorn nut 14 in the formed space and waterproof extraterrestrial being embedded on the guide portion 8.For can from any direction of outside see the front end of connecting tube 22 whether be inserted into be arranged on instrument hooking part 3 in retainer 4 on weeks contact, equally spaced run through being provided with a plurality of affirmations hole 5 (being three in the present embodiment) at the instrument hooking part 3 upper edge side faces of adapter body 1.

In the present invention, in the time of connecting tube 22 being connected with pipe joint A, as shown in Figure 1, at first under the state that will enclose 18 insertion guide rings 11, acorn nut 14 is screwed in the convex thread portion 7 of joint 1.At this moment, guide ring 11 outer being embedded on the front end of guide portion 8.

Then, when from the state of Fig. 1 the front end of connecting tube 22 is inserted from the opening portion 17 of acorn nut 14 and outside on the guide portion 8 of scarved joint main body 1 time, the inner peripheral surface of connecting tube 22 is extraterrestrial as shown in Figure 2 to be embedded on the outer circumferential face of cylindrical part 12 of guide ring 11, and cylindrical part 12 is clamped between the outer circumferential face of the inner peripheral surface of connecting tube 22 and guide portion 8, and the whole outer circumferential face of the even squeeze sealing member 10 of the inner peripheral surface of cylindrical part 12 also covers Sealing 10 ground and slides.At this moment, cut into skewed even the front-end face of connecting tube 22 is not vertical or connecting tube 22 inserts in the opening portion 17 of acorn nut 14 under heeling condition, because connecting tube 22 is not embedded on the guide ring 11 with Sealing 10 is outer in contact, cylindrical part 12 inner peripheral surfaces of guide ring 11 are the whole outer circumferential face of squeeze sealing member 10 equably, so Sealing 10 can be because of connecting tube 22 front ends start, so can not cause damage.

In addition, when connecting tube 22 was inserted, the lip part 13 on the guide ring 11 was subjected to the pushing of connecting tube 22 end faces and moves with connecting tube 22, and as shown in Figure 3, the lip part 13 of guide ring 11 is when abutting against the retainer 4 of adapter body 1 and stop.At this moment, because connecting tube 22 is sandwiched between the guide portion 8 and circle 18 of adapter body 1, and enclose the outer circumferential face of 18 the conical surface 20 extruded joint pipes 22, the groove 21 of nipping is nipped in the outer circumferential face, connecting tube 22 is squeezed on the outer circumferential face of guide portion 8, so Sealing 10 has played seal action really, only otherwise unclamp acorn nut 14, just can not extract connecting tube.

And, even on the inner peripheral surface of connecting tube 22, adhered to foreign matter, also can block foreign matter by the Sealing 10 of the forward end on the guide portion 8 that is contained in adapter body 1 and can realize reliably and the sealing of connecting tube 22 by inboard seal 10.

In addition, whether the front end that can observe connecting tube 22 through the affirmation hole 5 on instrument hooking part 3 side faces touches the retainer 4 of adapter body 1, under the situation that does not touch retainer 4, confirm hole 5 on one side then can observe, get final product Yi Bian continue to insert connecting tube 22 inwards.

In such pipe joint A, even will from adapter body 1, extract connecting tube 22, then as long as circle 18 conical surfaces 16 along acorn nut 14 move to opening portion 17, the groove 21 of nipping will be nipped in the outer circumferential face of connecting tube 22 deeply, and the inner peripheral surface of Sealing 10 extruded joint pipes 22, thereby neither can leak and can not extract.

In addition, though in connecting tube 22 hydraulic pressure of water of circulation unusual when high connecting tube 22 can expand, Sealing 10 also be out of shape and closely is attached to reliably on the inner peripheral surface of connecting tube 22, so can not leak.

Claims

1. pipe joint, wherein adapter body has connecting tube is embedded in cylindric guide portion on the inboard of the convex thread portion that takes shape on the periphery outward, this guide portion is formed with slotted eye on outer circumferential face, the Sealing of tight contact connecting tube inner peripheral surface is installed in slotted eye, be provided with circle being screwed between acorn nut in the above-mentioned convex thread portion and the guide portion, resinous connecting tube is inserted from the opening portion of acorn nut, can be connected on the adapter body by the outer circumferential face of circle extruded joint pipe, it is characterized in that, be embedded with the guide ring that can cover Sealing outside on the periphery of above-mentioned guide portion, this guide ring is sandwiched in when connecting tube is inserted from the opening portion of acorn nut between the outer circumferential face of the inner peripheral surface of connecting tube and guide portion, and slide on guide portion in the outer circumferential face limit of the even squeeze sealing member in limit thus.

2. pipe joint as claimed in claim 1 is characterized in that, above-mentioned guide ring is by being embedded in the cylindrical part on the guide portion outer circumferential face outward and constituting with the lip part of connecting tube front end butt.