CN1328536C - Internal expansion jointed pipe fitting special for steel-plastic composite pressure pipe - Google Patents
Internal expansion jointed pipe fitting special for steel-plastic composite pressure pipe Download PDFInfo
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- CN1328536C CN1328536C CNB2005101131487A CN200510113148A CN1328536C CN 1328536 C CN1328536 C CN 1328536C CN B2005101131487 A CNB2005101131487 A CN B2005101131487A CN 200510113148 A CN200510113148 A CN 200510113148A CN 1328536 C CN1328536 C CN 1328536C
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Abstract
The present invention relates to a special connecting pipe fitting for steel-plastic composite pressure pipes. The present invention comprises a threaded ring, a clamping ring and a left and a right sealing rubber rings, wherein grooves of complete turn are respectively arranged on the inner cylindrical surfaces of the threaded ring and the clamping ring; the end of a pipe prepared to be connected is sheathed with the threaded ring, and the end of the other pipe is sheathed with the clamping ring; expanding tools are inserted inside the pipes to expand the pipes into the groove to make the threaded ring and the clamping ring fixed with the pipes; the left and the right sealing rubber rings are respectively sheathed in the ends of two pipes of which ports are expanded; the threaded ring and the clamping ring are clamped and fixed. The present invention has the advantages of high withstand voltage, slippage prevention, good sealing effect, low cost, no reduction, safety and reliability.
Description
(1), technical field
The present invention relates to expanded joint jointed tubular workpieces in a kind of steel-plastic composite pressure pipe special use.
(2), background technique
The steel-plastic composite pressure pipe industry is a kind of new industry that has just grown up recent years, because characteristics such as its bearing capacity height, price are low, good corrosion resistance, linear expansion coeffcient are little, and had an optimistic view of by numerous manufacturing firms and user.But the pipe fitting of steel-plastic composite pressure pipe is supporting from existing market situation and field feedback, and allows of no optimist, and exists very big problem aspect pipe fitting supporting.
The special pipe fitting of the steel-plastic composite pressure pipe of Chu Xianing mainly contains following several in the market: sealing rigidity pipe fitting (2) clamp-press type pipe in (1) crimping; (3) groove-fastening type pipe fitting; (4) groove type pipe; (5) socket fitting.These pipe fittings in use all exist various problems.Therefore, the application and the popularization of steel-plastic composite pressure pipe have been restricted.
Sealing rigidity pipe fitting is that a kind of bearing capacity is higher in the crimping, and resistance to plucking takes off the stronger steel-plastic composite pressure pipe special pipe fitting of ability, but the connection of this pipe fitting needs the specific hydraulic flaring machine, the Work machine tool is relatively heavier, it is not too convenient to construct, and pipe fitting costs an arm and a leg maintenance difficult.
Clamp-press type pipe can only be used for the small-bore steel-plastic composite pipe of φ below 63.The problem of its existence is: (1) because this kind pipe fitting is the interior sealing means that adopts, and its passive neck bush is the inboard that is placed on pipe, so there is the tube reducing phenomenon in this kind pipe fitting in the joint of pipeline.(2) because this kind pipe fitting is stainless steel sleeve to be fastened on outer the moulding of pipe by special tool, be difficult to make pipe deformation, the outer resistance to plucking of having moulded of a tube material takes off effect, and bearing capacity is on the low side, may cause the poorly sealed of joint and leaks.
The groove-fastening type pipe fitting is a copper nickel plating pipe fitting, the bearing capacity height, and antiseptic power is strong, and it is more convenient to construct, but the problem of its existence is: (1) pipe fitting costs an arm and a leg; What (2) this kind pipe fitting adopted is interior sealing means, and some will put into tubing inside pipe fitting, so there is serious tube reducing problem in this kind pipe fitting in the joint of pipeline.
The problem that groove type pipe exists is: (1) this kind pipe fitting needs special tool that the slot rolling processing is carried out in the tubing end, roll out the groove of the certain width and the degree of depth in the tubing end, because the degree of depth of this groove has only about 2mm, only outer flow shape, several of steel pipes are indeformable, therefore bearing capacity is low, and resistance to plucking takes off a little less than the ability; (2) when the roll extrusion groove, tubing is inner can to produce projection, and this can produce a certain amount of tube reducing to the tube connector place; Therefore (3) plant the Placement resistance to plucking thus and take off a little less than the ability, can only be used to install with burying, and, make troubles to construction at the pipeline position mud buttress of will fetching water that turns round, and the increase operating expenses.
The problem that socket fitting exists is: (1) this kind Placement is the external sealed mode, the tube end face contact medium, therefore in order to prevent the end layering of steel-plastic composite pressure pipe tubing, must seal processing to the tubing end when the tubing sawing, difficulty of construction is bigger; (2) this kind pipe fitting does not possess anti-slip ability basically, and the tubing installation specification is relatively harsh, and the piping erection requirement mud buttress of fetching water that finishes increases difficulty of construction and expense; (3) the pipe fitting price is more expensive; (4) insert pipe fitting inside by tubing, extracting of tubing is difficult, and this just makes that the maintenance of pipeline is relatively more difficult.
(3), summary of the invention
In order to overcome the shortcoming of prior art, the invention provides expanded joint jointed tubular workpieces in a kind of steel-plastic composite pressure pipe special use, its withstand voltage height, anti-slip, good sealing effect, cost be low, tube reducing, safe and reliable not.
The present invention solves the technological scheme that its technical problem takes: it comprises threaded collar, snap ring, left and right sides O-ring seal, the groove that whole circle is arranged respectively on the inner cylindrical surface of described threaded collar and snap ring, end at a tubing of preparing to connect puts threaded collar, the end of another root tubing puts snap ring, with dilating frock insertion tubing inside tubing is dilated to described groove, threaded collar and snap ring and tubing are fixed, described left and right sides O-ring seal is inserted in the tubing end of two good mouths that expand respectively, and threaded collar and snap ring are fixedly clamped.
Described threaded collar and snap ring screw fixing by nut and the outside thread on the threaded collar that is enclosed within on the snap ring.
Described threaded collar and snap ring pass through bolt.
The present invention compared with prior art has following advantage: (1) this kind pipe fitting so there is not the problem of tube reducing in this kind pipe fitting in the joint, is a kind of pipe fitting of isometrical connection owing to adopted the inner bulging gate technology, has guaranteed the effective drift diameter of pipe; (2) because the threaded collar and the snap ring of this kind pipe fitting all is directly to expand on tubing by inner bulging gate, and the steel and the expansion of having moulded layer all consistent generation, the steel pipe layer has also played resistance to plucking and has taken off effect; Again since the tail diameter of threaded collar, snap ring and inner swelling method orchid less than enlarging after steel mould the diameter of steel pipe in the pipe, also increased the anti-pull-out force of pipe fitting.Make joint more safe and reliable by above-mentioned two kinds of measures; What (3) this kind pipe fitting adopted on sealing means is the sealing means that end face and side combine, so guaranteed the sealing reliability of joint; (4) because each parts on this kind pipe fitting all are removable, so this kind pipe fitting can recycling; (5) this pipe fitting adopts nut to be connected with flange, and dismounting is more convenient, is convenient to maintenance.
(4), description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 presses structural representation for expand tube spare equal coupling in the cold water nut formula of the present invention connects;
Fig. 2 is expand tube spare equal coupling linkage structure schematic representation in the hot water nut formula of the present invention;
Fig. 3 is expand tube spare elbow connection diagram in the cold water nut formula of the present invention;
Fig. 4 is expand tube spare elbow connection diagram in the hot water nut formula of the present invention;
Fig. 5 is expand tube spare equal coupling linkage structure schematic representation in the cold water flange-type of the present invention;
Fig. 6 is expand tube spare equal coupling linkage structure schematic representation in the hot water flange-type of the present invention;
Fig. 7 is expand tube spare elbow connection diagram in the cold water flange-type of the present invention;
Fig. 8 is expand tube spare elbow connection diagram in the hot water flange-type of the present invention.
(5), embodiment
The present invention is and earlier steel-plastic composite pressure pipe is carried out inner bulging gate, and then carries out the connection of pipeline, and the present invention all can not cause the tube reducing problem to pipeline.Sealing means all adopts the sealing means of tube end sealing and side sealing combination.
This kind pipe fitting Dn63 and following specification adopt the nut formula, and the above specification of Dn63 adopts flange-type.
1, expand tube spare equal coupling pipe fitting is made up of threaded collar 4, snap ring 1, nut 2, left and right sides O-ring seal 3 etc. in the nut formula.The connecting means of this kind pipe fitting is:
1) connection of equal coupling pipe fitting: (1) puts threaded collar 4 in the end of a tubing of preparing to connect; End at another root tubing of preparing to connect puts snap ring 1; (2) special use is dilated frock and insert tubing inside, tubing inside is dilated to the size of regulation, simultaneously threaded collar 4 and snap ring 1 are directly dilated the end of tubing, as shown in Figure 1; (3) left and right sides O-ring seal 3 is inserted in two tubing ends of mouth well of expanding, if making hot water pipeline uses, lengthening left and right sides O-ring seal 3 part in tubing, on the left and right sides O-ring seal 3 that dilates the position of tubing inside, put into left and right sides internal expension ring and spring ring 7 respectively, left and right sides O-ring seal 3 is compressed, with nut 2 two tubing are even tightly got final product then, as shown in Figure 2.
2) non-equal coupling pipe fitting and equal coupling pipe fitting are basic identical, and different is to save threaded collar 4, and nut 2 directly is connected with bigbore tubing.
3) with being connected of other pipe fittings such as threeway, elbow: (1) puts snap ring 1 in the tubing end of preparing to connect; (2) special use is dilated frock and insert tubing inside, dilate the size that causes regulation in the tubing end is carried out, simultaneously snap ring 1 is directly dilated the end of tubing; (3) left and right sides O-ring seal 3 is inserted in the tubing end, if making hot water pipeline uses, lengthening left and right sides O-ring seal 3 part in tubing, on the left and right sides O-ring seal 3 that dilates the position of tubing inside, put into left and right sides spring ring 7 respectively, compress left and right sides O-ring seal 3, with nut 2 tubing and pipe fitting are linked together and tightening nuts 2, promptly finished connection, as shown in Figure 4.
2, expand tube spare is made up of left and right sides inner swelling method orchid, bolt 10, left and right sides O-ring seal 3 etc. in the flange-type equal coupling;
1) connection of the blue straight-through pipe fitting of isometrical inner swelling method: (1) puts left and right sides inner swelling method orchid respectively in the end of two tubing preparing to connect; (2) special use is dilated frock and insert tubing inside, tubing inside is dilated to the size of regulation, simultaneously left and right sides inner swelling method orchid is directly dilated the end of tubing, as shown in Figure 5; (3) left and right sides O-ring seal 3 is inserted in two tubing ends of mouth well of expanding respectively, if making hot water pipeline uses, lengthening left and right sides O-ring seal 3 part in tubing, on the left and right sides O-ring seal 3 that dilates the position of tubing inside, put into left and right sides spring ring 7 respectively, compress left and right sides O-ring seal 3, as shown in Figure 6, with bolt 10 left and right sides inner swelling method orchid is linked together then, promptly finished the connection of this kind pipe fitting.
2) non-equal coupling pipe fitting and equal coupling pipe fitting are basic identical, and different is to save an inner swelling method orchid, directly is connected with pipe fitting.
3) with being connected of other pipe fittings such as threeway, elbow: (1) puts the inner swelling method orchid in the tubing end of preparing to connect; (2) special use is dilated frock and insert tubing inside, dilate the size that causes regulation in the tubing end is carried out, simultaneously the inner swelling method orchid is directly dilated the end of tubing, as shown in Figure 7; (3) left and right sides O-ring seal 3 is inserted in the tubing end, if making hot water pipeline uses, lengthening left and right sides O-ring seal 3 part in tubing, on the left and right sides O-ring seal 3 that dilates the position of tubing inside, put into left and right sides spring ring 7 respectively, press left and right sides tightening seal cushion rubber 3, as shown in Figure 8, the flange on orchid of the inner swelling method on the tubing and the pipe fitting is linked together, promptly finished connection with bolt 10.
Claims (4)
1, expanded joint jointed tubular workpieces in a kind of steel-plastic composite pressure pipe special use, it is characterized in that: it comprises threaded collar (4), snap ring (1), left and right sides O-ring seal (3), the groove that whole circle is arranged respectively on the inner cylindrical surface of described threaded collar (4) and snap ring (1), end at a tubing of preparing to connect puts threaded collar (4), the end of another root tubing puts snap ring (1), with dilating frock insertion tubing inside tubing is dilated to described groove, threaded collar (4) and snap ring (1) and tubing are fixed, described left and right sides O-ring seal (3) is inserted in the tubing end of two good mouths that expand respectively, and threaded collar (4) and snap ring (1) are fixedly clamped.
2, expanded joint jointed tubular workpieces in the steel-plastic composite pressure pipe special use according to claim 1 is characterized in that: described threaded collar (4) and snap ring (1) screw fixing by being enclosed within nut (2) on the snap ring (1) and the outside thread on the threaded collar (4).
3, expanded joint jointed tubular workpieces in the steel-plastic composite pressure pipe special use according to claim 1 is characterized in that: described threaded collar (4) and snap ring (1) are fixing by bolt (10).
4, expanded joint jointed tubular workpieces in the steel-plastic composite pressure pipe special use according to claim 1 is characterized in that: dilate in tubing inside on the left and right sides O-ring seal (3) at position and put into left and right sides internal expension ring and spring ring (7) respectively, left and right sides O-ring seal (3) is compressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101131487A CN1328536C (en) | 2005-10-15 | 2005-10-15 | Internal expansion jointed pipe fitting special for steel-plastic composite pressure pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101131487A CN1328536C (en) | 2005-10-15 | 2005-10-15 | Internal expansion jointed pipe fitting special for steel-plastic composite pressure pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1752505A CN1752505A (en) | 2006-03-29 |
| CN1328536C true CN1328536C (en) | 2007-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101131487A Active CN1328536C (en) | 2005-10-15 | 2005-10-15 | Internal expansion jointed pipe fitting special for steel-plastic composite pressure pipe |
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| Country | Link |
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| CN (1) | CN1328536C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116857472B (en) * | 2023-09-05 | 2023-12-26 | 江苏英斯坦福环境科技有限公司 | High pressure steel wire pipe plastic flanging connection structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179519Y (en) * | 1993-12-25 | 1994-10-12 | 周训钊 | Low pressure flexible pipe joint |
| JPH10122453A (en) * | 1996-10-18 | 1998-05-15 | Tokyo Gas Co Ltd | Fitting device of pipe for compressed natural gas car |
| CN2390086Y (en) * | 1998-06-22 | 2000-08-02 | 李明义 | Strong pipe joint structure with expanding flexibility |
| US6398268B1 (en) * | 1999-03-04 | 2002-06-04 | Nitto Kohki Co., Ltd. | Pipe coupling for female screw |
| CN2586865Y (en) * | 2002-08-09 | 2003-11-19 | 新兴铸管股份有限公司 | Pipe fittings special for screw cap connection type steel-plastic composite pressure pipe |
| CN2588167Y (en) * | 2002-08-09 | 2003-11-26 | 新兴铸管股份有限公司 | Flange join type steel-plastics combined joint for pressure pipe |
| JP2005061536A (en) * | 2003-08-13 | 2005-03-10 | Jfe Pipe Fitting Mfg Co Ltd | Heat-resistant pipe joint |
-
2005
- 2005-10-15 CN CNB2005101131487A patent/CN1328536C/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2179519Y (en) * | 1993-12-25 | 1994-10-12 | 周训钊 | Low pressure flexible pipe joint |
| JPH10122453A (en) * | 1996-10-18 | 1998-05-15 | Tokyo Gas Co Ltd | Fitting device of pipe for compressed natural gas car |
| CN2390086Y (en) * | 1998-06-22 | 2000-08-02 | 李明义 | Strong pipe joint structure with expanding flexibility |
| US6398268B1 (en) * | 1999-03-04 | 2002-06-04 | Nitto Kohki Co., Ltd. | Pipe coupling for female screw |
| CN2586865Y (en) * | 2002-08-09 | 2003-11-19 | 新兴铸管股份有限公司 | Pipe fittings special for screw cap connection type steel-plastic composite pressure pipe |
| CN2588167Y (en) * | 2002-08-09 | 2003-11-26 | 新兴铸管股份有限公司 | Flange join type steel-plastics combined joint for pressure pipe |
| JP2005061536A (en) * | 2003-08-13 | 2005-03-10 | Jfe Pipe Fitting Mfg Co Ltd | Heat-resistant pipe joint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1752505A (en) | 2006-03-29 |
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