CN2694083Y

CN2694083Y - Fittings for water or steam

Info

Publication number: CN2694083Y
Application number: CN 200320100921
Authority: CN
Inventors: 黎莲威
Original assignee: Anye Global Co ltd
Current assignee: Anye Global Co ltd
Priority date: 2003-10-14
Filing date: 2003-10-14
Publication date: 2005-04-20
Anticipated expiration: 2013-10-14

Abstract

A water or steam pipe joint is provided, by which a pipe can be connected to a pipe without threading the end of the pipe, but using an internally toothed locking ring. The fitting includes a conventional tube fitting having internal threads at its mouth end, a conventional elastomeric seal ring contacting the inner end surface of the tube fitting; a positioning sleeve sleeved outside the sealing ring; an internal tooth locking ring disposed on the outer end surface of the positioning sleeve; the opening and closing ring is arranged outside the internal tooth locking ring, the inner diameter of the opening and closing ring is matched with the outer diameter of the pipe to be inserted in a sliding manner, the end surface facing the internal tooth locking ring is a withdrawing surface, and the outer circular surface facing the outside is provided with an external thread; an inner hole surface is provided with an internal thread matching with the external thread of the opening and closing ring, a cylindrical part of the outer surface is provided with a plug sleeve matched with the inner hole surface of the pipe joint in a sliding way, and the external thread part of the outer surface is provided with a plug sleeve screwed with the internal thread of the pipe joint. The pipe joint of the utility model can be used for the pipeline connection of a water supply or gas supply system.

Description

The pipe joint that is used for water or vapour

Technical field

The utility model relates to and catchmenting or the component of the device, particularly water supply piping system of vapour or water distribution.

Background technique

The simplest common water or steam pipe connect are to make internal thread (pipe thread) at the pipe end of accommodating of joint, make the outside thread that matches at the pipe end that must connect, and again this are shaped on externally threaded pipe end and are screwed in the internal thread of pipe joint.Because screw thread always has certain degree of depth, so pipe inevitably can be weakened in the mechanical strength of threaded end.Because pipe thread is generally all more coarse, so water or the steam pipe resistance when being screwed into pipe joint is very big.Because pipe shaft is smooth cylinder, can't use common spanner, therefore need use the pipe wrench that has special jaw to kill on pipe shaft, could be screwed into screw thread with strength, after assembling by the time, stay distortion and scar that jaw causes on the pipe shaft inevitably.

And in the time of need pulling down after the pipe that has installed has used a period of time, the strength of being taken is just bigger.This moment the screw thread position because of various reasons (for example, get rusty, distortion, gluing ...) only can an interlock get tightlyer, so the distortion that is caused by the pipe wrench jaw on the pipe shaft and scar can be more more serious.Simultaneously, whole pipe is also very easy ruptures at the screw thread position.

In addition, along with the progress in development in science and technology and epoch, the material of pipe also variation gets up: galvanized iron pipe (zinc-plated low charcoal steel pipe) is arranged, plastic tube (rigid pvc pipe) is arranged, the naked body copper pipe is arranged, have outer surface to be coated with the plastics copper pipe, there is internal surface to be coated with the plastics galvanized iron pipe, the outer surface chromium-plated tube is arranged, various alloy pipes are arranged.The appearance of pipe all should not be used the pipe spanner no matter be coated with or plate, because being coated with/the basic snap-in force that is subjected to not live pipe spanner jaw of just supporting of coating of outer surface, continuous being coated with/coating is certain to be destroyed by jaw.Even naked body copper pipe and alloy pipe because surface hardness is significantly less than the hardness of jaw, have used pipe wrench can make the pipe shaft surface stay ugly distortion and scar.

Therefore the someone is developed and the multiple pipe joint that not be used in pipe end system screw thread very early, and for example wherein a kind of is mouth of pipe turned welt, and this method only is applicable to the softer and yielding pipe of material, for example copper pipe.Another kind is to utilize the cushion rubber that compresses be positioned at the pipe end outer surface, for example common plastics sewer in the family.Though these two kinds of prior arts have been deleted pipe thread, the joint of pipe and joint is still by screw thread, and different is, and present outside thread is on the outer surface of pipe joint, and internal thread is on the swivel nut that is enclosed within on the pipe shaft.Though these two kinds of methods can be eliminated the problem that pipe shaft is not hindered by the jaw pincers, the unfortunate scope of using too little (galvanized iron pipe can not be used), structure (pipe end swivel nut) and operation (turned welt and nutting) hell to pay.

So once the someone found out the internal thread that replaces the prior art pipe joint with the internal tooth clamp ring, the pipe end that does not have screw thread is directly passed in the internal tooth clamp ring insertion tube joint, pipe has just moved back to come out.Unfortunately trial assembly is indispensable when practice of construction, if once assemble the back with regard to on-detachable words, equals both inaccurate people's trial assembly, does not allow the people keep in repair again.Therefore this way is unmanned so far uses.

The model utility content

The purpose of this utility model provides a kind ofly must not make the water or the steam pipe connect of the use internal tooth clamp ring of screw thread at pipe end, and it both had been applicable to the pipe of any material, can optionally insert pipe again and take out pipe.

In order to achieve the above object, water of the present utility model or steam pipe connect comprise: a traditional mouth end has the pipe joint of internal thread; Traditional elastic seal ring of this pipe joint interior edge face of contact; A setting sleeve that is enclosed within sealing circle outside; One places the internal tooth clamp ring on this setting sleeve exterior edge face; One place this internal tooth clamp ring outside, internal diameter and must insert that the tube outer diameter cunning joins, be one towards the end surfaces of this internal tooth clamp ring and move back the face of pulling out, on the outer round surface of outside, be shaped on externally threaded keying ring; The internal thread that bore area is shaped on and the outside thread of this keying ring matches, what the cylinder of outer surface was partly made and this pipe joint bore area cunning is joined, the outside thread of outer surface is partly made and the plug sleeve of the internal screw-thread screw of this pipe joint.

Description of drawings

Concrete structure of the present utility model will explain in conjunction with following accompanying drawing, wherein;

Fig. 1 is the three-dimensional exploded view of the utility model water or steam pipe connect;

Fig. 2 A～Fig. 2 E is respectively the parts drawing of each parts among Fig. 1;

Fig. 3 is the eave tile spanner stereogram that is used for the utility model water or steam pipe connect.

Embodiment

As shown in Figure 1, the utility model water or steam pipe connect are on the basis of the pipe joint 6 of prior art, have increased by five parts and have formed.Because make screw thread to the end of a pipe as five parts (1-5) among Fig. 1 are taken away this moment, be screwed in the internal thread of pipe joint 6, be exactly the prior art pipe joint method of standard.But the utility model has increased by five parts: the 5th, with the elastic seal ring of synthetic rubber (for example ethylene propylene rubber) system, be used for withstanding the pipe end of palpus connecting tube.4 is setting sleeves made of plastic that are enclosed within sealing circle 5 outsides, the inner periphery of the outer round surface of this setting sleeve 4 and pipe joint 6 matches, the cylindrical of the internal circular surfaces of this setting sleeve 4 and this elastic seal ring 5 matches, and makes these elastic seal ring 5 maintenances and tubular axis concentric.The end face outwardly of this setting sleeve 4 is shelved for the internal tooth clamp ring 3 of a stainless steel.The external diameter of this internal tooth clamp ring 3 is identical with the external diameter of this setting sleeve 4, and all the inner periphery with pipe joint 6 matches.In the outside of this internal tooth clamp ring 3 are keying rings 2 made of copper.These keying ring 2 end surfaces towards this internal tooth clamp ring are one and move back the face of pulling out that if this moves back the internal tooth that the face of pulling out is pressed to this internal tooth clamp ring 3, then these internal tooths just open.This keying ring 2 is shaped on outside thread on the outer round surface of outside (among the figure to the right).The interior circular diameter of this keying ring 2 is joined with the external diameter cunning that must be connected (insertion) pipe.1 is a plug sleeve, the internal thread that its bore area is shaped on and the outside thread of this keying ring 2 matches, and the cylinder of its outer surface is partly made and these pipe joint 6 bore area cunnings are joined, and the outside thread of its outer surface is partly made and the screw-internal thread fit of this pipe joint 6.

Fig. 2 A～Fig. 2 E is the parts drawing of the utility model water or steam pipe connect.Except pipe joint 6 (because it is a prior art), all shown.

Therefore, after whole part assemblings were in place, the axial position of six parts was just fixing, can not become flexible each other.At this moment, plug sleeve 1 and any known method of pipe joint 6 usefulness can be fixed into one, for example pour in its two screw thread that match, thereby stop back-outing of plug sleeve 1 with glue, or the like.Like this, all assembling work has just been finished.Can must connect (insertions) pipe open and close the endoporus insertion of ring 2 by this, the pipe end that inwardly slide this moment can inwardly back down the internal tooth of tooth clamp ring 3, compresses elastic seal ring 5 and sent " noise made in coughing or vomiting " one by the internal tooth of internal tooth clamp ring 3 chucking when slightly bouncing back up to pipe end.At this moment pipe is stuck, again pulls out to come out.Clamping force is relevant by poor (also being the inclined degree of internal tooth when blocking pipe) of the internal diameter of the internal tooth of tooth clamp ring 3 and pipe end external diameter.Generally effect is comparatively desirable between 20 ° to 35 °.Because inclination is big more, it is also big more to reach the axial counter-force that opens and closes ring 2, plug sleeve 1 via internal tooth clamp ring 3, and too big axial force is very unfavorable through the thinnest mouth end that screw thread reaches pipe joint 6.The tilt angle is little, and most axial force changes into radial force, and the inner periphery thicker by the thickness of pipe joint 6 bears, and is just much reasonable.

In the time of need from pipe joint 6, taking out pipe, need only open and close ring 2 to this and rotate, keying ring 2 inside (lefts among the figure) are put in, open and close the internal tooth that the face of pulling out is pressed to internal tooth clamp ring 3 that moves back of ring 2 the inners, it is further sloped inwardly.Like this, the crown of internal tooth has left the pipe end outer round surface, and pipe just can take out easily.After pipe takes out, just can encircle 2 and go back to original position opening and closing, make the internal tooth of tooth clamp ring 3 be returned to the position of original approximate vertical.The back-outing to be screwed into of this keying ring 2 can be used any existing mode.As example, the utility model is to take to bore a plurality of recess 21 on the outer end annular surface of this keying ring 2, again two column caps on eave tile spanner 7 (see figure 3)s of Y shape 71 are inserted in these a plurality of recess 21 two radially in the recess 21, pull spanner 7, this keyings encircles 2 just along with having rotated.This opens and closes two rotation dead points of ring 2; One is when inwardly being screwed into, and this of this keying ring 2 moves back the face of pulling out and withstand on the exterior edge face of this setting sleeve 4 by this internal tooth.Another be this keying ring 2 outwards (among the figure to the right) fall back on when most.Can make the distance between these two dead points and be slightly less than 180 °.In addition, in order to look after mounting or dismounting people's during pipe operating habit, this keyings encircles 2 outside thread and is made into left tooth, so as eave tile spanner 7 when pulling to the right pipe tightened, pipe is released when pulling left.

Water of the present utility model or the steam pipe connect made by said method can cooperate the copper pipe of BS 2871Part1/EN 1057 through test, and the pressure requirement that meets copper fitting among the BS 864/EN 1254.The elastic seal ring 5 that ethylene propylene rubber is made when water temperature during at 1 ℃-20 ℃, can bear the pressure of 20 crust (about 300 pounds/square time) and water-tight when pressured state.When water temperature respectively at 30 ℃, when 65 ℃ and 90 ℃, can bear 16 crust (about 230 pounds/square time), the pressure of 10 crust (about 145 pounds/square time) and 6 crust (about 85 pounds/square time).Therefore water of the present utility model or steam pipe connect can be applied to all hot water or cold water's water systems and gas pipe-line system.

Because pipe is to insert in water of the present utility model or the steam pipe connect, so the coil serving of increased in size can not be arranged on the insertion end certain-length sliding joining.So will criticize the size that the plastic layer according to the form below that the copper pipe outer surface coats is recommended.

Connect specification
Connect specification		The copper pipe diameter	The copper pipe depth of engagement
15mm	20mm	The copper pipe diameter	The copper pipe depth of engagement
15mm	20mm	22mm	25mm
28mm	30mm	22mm	25mm
28mm	30mm	35mm	32mm
42mm	35mm	35mm	32mm

54mm	40mm
54mm	40mm	67mm	42mm
76mm	45mm	67mm	42mm

When batch removing the copper pipe surface plastics, do not injure copper pipe surface.Especially vertically do not draw deeply in copper pipe surface, because the scar of this form can cause copper pipe to leak under fatigue load in the future along tubular axis with point of a knife.

Because being connected of water of the present utility model or steam pipe connect and pipe is partly to combine by sliding to join and collude thorn two, so when pipe is pushed water pipe adapter of the present utility model a little rotation can be arranged.If be installed in the concrete or the position of underground, be preferably on the connecting port of pipe and joint and seal up gummed paper, or elder generation puts cushion rubber on copper pipe when mounted, again cushion rubber is pushed into the position that covers connecting port after finishing when plugging into, joins the gap and enter in the water pipe adapter by sliding to prevent any liquid or dust.

Because close this elastic seal ring 5 that relies on fully of liquid between water of the present utility model or steam pipe connect and the pipe, so the end face of the mouth of pipe should just can make this elastic seal ring 5 uniform-compressions with the bottom end keeping parallelism of pipe joint after assembling finishes, just can guarantee sealing.Therefore, to note the perpendicularity requirement of otch and tubular axis the time marquis who cuts out pipe.To remove any burr that is enough to stab this elastic seal ring 5 after cutting out pipe.

Above to each part material therefor for example, just in order to make everybody produce embodiment's product, be not restriction to water of the present utility model or steam pipe connect by this.In fact pipe joint 6 can be used various alloys such as copper, steel, iron, selects casting for use, punching press, and several different methods manufacturings such as oil pressure, the plastics of very applying adopt injection moulding, and methods such as blowing are made.The also not necessarily non-ethylene propylene rubber of using of elastic seal ring 5, other effect identical materials can be used.Be example above with the copper pipe, so copper pipe surface is lived in the very easy embedding of the steel internal tooth of internal tooth clamp ring 3.But when the hardness of tubing improves, when for example using steel pipe or iron pipe, because the steel internal tooth of internal tooth clamp ring 3 can't embed steel (or iron) tube-surface effectively, thus to embed the annular groove of a spill of position system at this internal tooth of pipe, so that admit those internal tooths.Effect of the present utility model has been except having eliminated the work of making screw thread at pipe two, thereby saved the machine and the man-hour of making screw thread.Simplified the operation when installing again, made construction safer.The speed of installing engineering and the reuse degree of old material have more been improved.

Claims

1. A water or steam pipe joint, comprising a traditional pipe joint with an internal thread at the mouth, characterized in that it also includes:

A conventional elastomeric seal contacting the inner end face of the pipe joint;

A positioning sleeve set outside the sealing ring;

an inner tooth locking ring placed on the outer end face of the positioning sleeve;

One is placed outside the inner tooth locking ring, the inner diameter and the outer diameter of the pipe to be inserted are slip-fitted, the end surface facing the inner tooth locking ring is a withdrawal surface, and the outer circular surface facing the outside is formed with external threads The opening and closing loop;

The surface of an inner hole is made of an inner thread that matches the outer thread of the opening and closing ring, the cylindrical part of the outer surface is made to fit smoothly with the inner hole surface of the pipe joint, and the outer thread part of the outer surface is made to match the outer thread of the pipe joint. A plug sleeve that is screwed into the internal thread of the pipe joint.

2. The water or steam pipe joint as claimed in claim 1, characterized in that the elastic sealing ring is made of synthetic rubber.

3. The water or steam pipe joint according to claim 1, characterized in that the positioning sleeve is made of plastic.

4. The water or steam pipe joint according to claim 1, characterized in that the internal tooth locking ring is made of stainless steel.

5. The water or steam pipe joint according to claim 4, characterized in that the inclination of the internal teeth of the internal tooth locking ring is preferably between 20° and 35°.

6. The water or steam pipe joint as claimed in claim 1, characterized in that the opening and closing ring is made of copper.

7. The water or steam pipe joint according to claim 6, characterized in that there are a plurality of recesses on the annular surface of the outer end of the opening and closing ring for inserting the column head of the hook wrench.

8. The water or steam pipe joint as claimed in claim 6, characterized in that the external thread on the outer circular surface of the opening and closing ring can be made into a left tooth that conforms to the user's habit.

9. The water or steam pipe joint as claimed in claim 1, characterized in that the plug sleeve is made of copper.

10. The water or steam pipe joint as claimed in claim 1, characterized in that the plug sleeve is fitted to the conventional pipe joint with an internal thread at the mouth end and fixed into one piece.

11. The water or steam pipe joint according to any one of claims 1 to 10, characterized in that the water or steam pipe joint needs to be slip-fitted and inserted into the connecting pipe, which has the minimum joint length listed in the following table: Connection Specifications Copper pipe diameter Copper Tube Joint Depth 15mm 20mm 22mm 25mm 28mm 30mm 35mm 32mm 42mm 35mm 54mm 40mm 67mm 42mm 76mm 45mm

12. The water or steam pipe joint according to any one of claims 1 to 10, characterized in that when the hardness of the internal teeth of the internal tooth locking ring cannot be effectively embedded in the surface of the pipe to be connected, the A concave groove is formed at the embedded part of the internal teeth to receive the internal gear rings.