CN1191442C

CN1191442C - Quick connector for corrugated metal flexible tube

Info

Publication number: CN1191442C
Application number: CNB031293204A
Authority: CN
Inventors: 张申正
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-06-17
Filing date: 2003-06-17
Publication date: 2005-03-02
Anticipated expiration: 2023-06-17
Also published as: CN1460808A

Abstract

The present invention relates to a quick connector for a corrugated metal flexible tube, which comprises a main body (1) of the connector. The main body is provided with a jack in which the corrugated metal flexible tube can be inserted from back to front. The inner part of the jack is in sequence provided with a tooth-shaped claw ring (2), a sealing ring (3) and a clamping cover (4) from front to back along the direction of an axle, wherein the front end surface of the tooth-shaped claw ring (2) is limited by a step (12) arranged at the corresponding place of the jack of the main body. The present invention is characterized in that the outer peripheral surface at the back part of the pressing sleeve (4) is in a gradually shrinking conical shape, and the pressing sleeve (4) also comprises a limit sleeve (5) which is inserted in the jack of the main body from back to front. The inner wall at the front part of the limit sleeve (5) is provided with a conical surface matched with the outer periphery at the back part of the pressing sleeve (4), and the outer wall of the limit sleeve (5) is relatively fixed with the inner wall of the jack of the main body (1). Compared with the prior art, the present invention needs no external tools to reliably connect the corrugated metal flexible tube to the connector at the installation site, and can be connected with other pipeline connecting pieces via the front end of the main body of the connector. Once the connection is completed, the connector and the corrugated metal flexible tube are connected quite reliably. Even if the corrugated metal flexible tube is forcibly drawn, the connector is difficult to pull off the corrugated metal flexible tube.

Description

A kind of rapid pipe joint that is used for corrugated flexible metal tube

Technical field

The present invention relates to a kind of pipe joint, particularly a kind of rapid pipe joint that is used for connecting the corrugated flexible metal tube that is used to carry gas-liquid.

Background technique

The mode of traditional gas appliances such as connection LP gas cylinder, fuel tube or gas cooker is: tighten with Drop-proof with galvanized wire by the rubber pipe connection and at the two ends of rubber pipe; This Placement exists many defectives: install and transposing inconvenience, under bending state, block gas circuit easily, the rubber pipe corrosion-resistant, easily aging, working life is short, gas leak phenomenon takes place easily, just because of this, explosive incident is revealed in the annual gas poisoning or the combustion gas that all can take place to cause because of above-mentioned reason in all parts of the country.For solving the safe and reliable connectivity problem of gas pipeline, " the spirality shape corrugated metal hose connector " of our formerly Chinese utility model patent ZL97225276.2 number " plug-in type helical fissure metal hose connector " and ZL97225278.9 number discloses two kinds of main bodys is to be processed into the soft connecting tube with helical fissure metal tube, its two ends are welded with the thread connecting joint of metal, these two kinds of design proposals are owing to adopted the corrugated metal tube body, have certain flexible can be arbitrarily crooked and don't can bend, and it is convenient and reliable to be threaded, can thoroughly stop gas leakage, the choke phenomenon, thereby elimination is revealed because of combustion gas and is caused poisoning, the accident potential of explosive incident, practical effect is fine.Yet, just because of its termination connection employing is thread connecting mode, therefore corresponding gas appliance also must be supporting with thread connecting joint, and possess this condition have only a few cities such as Shanghai in China, the gas appliance in most of areas has still kept traditional rubber pipe inserted mode, and this has brought certain obstruction for applying of these two kinds of corrugated metal pipes; Simultaneously, corrugated metal pipe also has a minor defect, is exactly to embed dirt in its node easily and be difficult to cleaning.For this reason, we have proposed ZL01211062.0 number Chinese utility model patent " a kind of modified model metallic hose " again, it includes the metallic hose main body, its termination is welded with a metal joint, outside weld, be with a sheath, the afterbody of one plug-in type soft connector is enclosed within outside the described metal joint head, and the periphery wall of plug-in type soft connector is roughly equal with the sheath periphery wall, one cutting ferrule tightly wraps in outside described sheath and the plug-in type soft connector afterbody, makes the plug-in type soft connector be connected one because of pressing with metal joint; In order to solve the problem that node is embedded in dirt, outside the tube body of described corrugated metal, then also be with a soft protecting cover.But, more than three kinds of technological schemes, still exist a common drawback, the termination that is the corrugated flexible metal tube main body all must be welded with a metal joint, this just limits its length dimension, in case when dispatching from the factory, determine just can't change, more can't carry out freely reducing according to Len req at the scene.And existing various pipe joint is all at metal tube, plastic tube or composite pipe design, and not seeing has specially at the corrugated flexible metal tube design.

Summary of the invention

Technical problem to be solved by this invention is that a kind of rapid pipe joint that is used for connecting the corrugated flexible metal tube that is used to carry gas-liquid is provided at above-mentioned prior art present situation.

The present invention solves the problems of the technologies described above the technological scheme that is adopted: this rapid pipe joint that is used for corrugated flexible metal tube includes a joint body, it has one can hold the jack that corrugated flexible metal tube inserts from back to front, in this jack, be disposed with the profile of tooth dog collar vertically from front to back, seal ring and clamping sleeve, wherein the front-end face of profile of tooth dog collar is spacing by the step institute that the body jack is provided with in the corresponding part, the rear portion outer circumferential face that it is characterized in that described clamping sleeve is the conical surface shape that shrinks gradually, and include a stop collar that inserts from back to front in the body jack, its front inner wall has the conical surface that matches with described clamping sleeve rear portion periphery, the jack inwall relative fixed of its outer wall and body.

The jack outer wall of described stop collar outer wall and body can be by simply being threaded and relative fixed, but better, can have an annular groove at described stop collar outer wall, simultaneously also have an annular groove, make the two relative fixed by being embedded the elastic metallic wire ring between this a pair of annular groove in the inwall corresponding part of body;

Dismounting under maintenance or other situations can be designed to the stop collar afterbody to have a flange for convenience, and a packing ring is set between the rear end of this flange and body, and opens a darker annular groove again in abutting connection with ground before the annular groove of described body;

In order to guarantee when dispatching from the factory assembling, reason does not push away before with stop collar and in the shallow annular groove after causing the elastic metallic wire ring to snap in prematurely leaning in the body, also can snap in the expanding ring of a thickness greater than described packing ring between the rear end of described stop collar tail flange and body.

Described clamping sleeve is good with plastic material, and existing certain rigid has certain flexibility again so that seal ring successfully produces deformation, so that the further sealing to the corrugated flexible metal tube periphery to be provided; In order to strengthen the deformation power that is applied on the seal ring, can be provided with metal insert at the front end of clamping sleeve, this metal insert can be the grommet-type on plane, but better, is the quarter bend fold-type with L type cross section; For the ease of making, reduce required precision, also can be provided with metal insert at the ear end face of seal ring, and, for the extruding force that makes clamping sleeve passes to seal ring more equably, also can be between the metal insert of the metal insert of seal ring and clamping sleeve lining with the lining ring of an elastic material.

In order to strengthen sealing effect, also can between the inwall of the rear portion of stop collar outer wall and body, be embedded seal ring.

For the corrugated flexible metal tube that is with protecting cover outward, when connecting, its front end must be removed the part protecting cover, the length of exposed portions serve is good just in time to be positioned at clamping sleeve after inserting before, like this, and after connection, clamping sleeve can be pressed on the periphery of protecting cover simultaneously, plays seal action better; In order further to strengthen sealing effect, also can be embedded a seal ring at the afterbody inwall place of stop collar, with and the outer wall (protecting cover) of corrugated flexible metal tube between seal, also therefore limited the radially movable of corrugated flexible metal tube simultaneously.

For convenient connection further, also can on the inner body wall before the profile of tooth dog collar, be shaped on the step of an internal diameter less than the corrugated flexible metal tube external diameter, like this, when mounted, corrugated flexible metal tube one can be inserted into the end, until being subjected to stopping of this step.

The front end of described body can be designed to existing various connecting head form, and be threaded being used for as carving, or be designed to the link type being used for the sleeve rubber pipe with outside thread, or the like.

Compared with prior art, the present invention need not by external tool, free-handly can reliably and apace be connected corrugated flexible metal tube on the joint in the erecting bed, then be connected with other pipe joints by the joint body front end, and in case connection is finished, both connections are quite reliable, even exert oneself the drawing corrugated flexible metal tube, also be difficult to pull, multiple-sealed design has simultaneously guaranteed good sealing effect, can be widely used in gas-liquid pipelines such as gas pipe line, water supply pipe and connect.

Description of drawings

Fig. 1 is the structure cross-sectional schematic of the embodiment of the invention one when installing and using.

Fig. 2 is the structure cross-sectional schematic of the embodiment of the invention one when not being in place fully as yet.

Fig. 3 is the embodiment of the invention one is prepared when dismounting after installation a structure cross-sectional schematic.

Fig. 4 is the schematic perspective view of profile of tooth dog collar in Fig. 1～3.

Fig. 5 is the schematic perspective view of clamping sleeve and metal insert thereof in Fig. 1～3.

Fig. 6 is the structure cross-sectional schematic of the embodiment of the invention two.

Fig. 7 is the structure cross-sectional schematic of the embodiment of the invention two.

Embodiment

Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.

As shown in Figure 1, by embodiments of the invention one, include a joint body 1, it has one can hold the jack that corrugated flexible metal tube 9 inserts from back to front, one stop collar 5 inserts in this jack from back to front, in this jack and the position before stop collar 5, be disposed with profile of tooth dog collar 2 (referring to Fig. 4), seal ring 3 and metal insert 31 thereof, elasticity lining ring 32, clamping sleeve 4 and metal insert 41 thereof vertically from front to back;

Wherein the front-end face of profile of tooth dog collar 2 is spacing by 12 on the step that the body jack is provided with in the corresponding part, and the rear portion outer circumferential face of described clamping sleeve 4 is the conical surface shape that shrinks gradually, and the front inner wall of stop collar 5 then has inner conical surface with it;

The outer wall of stop collar 5 has an annular groove 51, also has an annular groove 14 in the inwall corresponding part of body simultaneously, and when mounted, an elastic metallic wire ring 6 is embedded and wherein makes the two relative fixed, referring to Fig. 2;

In the present embodiment, described stop collar 5 afterbodys have a flange 55, and a packing ring 7 is set between the rear end of this flange 55 and body, and open a darker annular groove 13 again in abutting connection with ground before the annular groove 14 of described body;

When assembling is used, elastic metallic wire ring 6 is placed in the annular groove 51 of stop collar, insert body 1 then, referring to Fig. 2; When the annular groove 14 of annular groove 51 and body is mutually concordant, elastic metallic wire ring 6 outer opening also partly snap in the annular groove 14 of body, thereby stop collar 5 can't be retreated, at this moment, the tail flange front-end face of stop collar 5 just in time offsets with packing ring 7, referring to Fig. 1; And front end node 91 places of bellows 9 can not extract because of the tight card that is subjected to profile of tooth dog collar 2, and simultaneously, seal ring 3 because of the extruding that is subjected to clamping sleeve 4 deformation takes place, and tightly is pressed in the periphery of bellows 9, thereby plays seal action.

When needs are dismantled, packing ring 7 is taken off, then stop collar 5 is firmly pushed away forward again, make the annular groove 51 on the stop collar mutually concordant with the dark annular groove 13 of body, open also outside then elastic metallic wire ring 6 continues and all snap in the annular groove 14 of body, referring to Fig. 3, at this moment, spacing releasing can will be extracted stop collar 5 backward.

In order to guarantee when dispatching from the factory assembling, the reason mistake will not push away before the stop collar 5 and causes elastic metallic wire ring 6 to snap in prematurely in the body 1 dark annular groove 14, in the present embodiment, between the rear end of described stop collar tail flange 55 and body 1, also snap in the expanding ring 8 of a thickness greater than described packing ring 7.

The metal insert 41 of described clamping sleeve 4 is for having the quarter bend fold-type in L type cross section, and both circumferentially have a plurality of radially notches on the front-end face edge, referring to Fig. 5, so that clamping sleeve 4 can produce certain radially deformation after being subjected to stop collar 5 and compressing, thereby provide further sealing to corrugated flexible metal tube 9 peripheries;

For the corrugated flexible metal tube 9 that is with protecting cover 92 outward, when connecting, its front end must be removed the part protecting cover, the length of exposed portions serve just in time is positioned at before the clamping sleeve 4 after inserting, like this, and after connection, clamping sleeve 4 can be pressed on the periphery of protecting cover 92 simultaneously, plays seal action better;

In the present embodiment, in order to strengthen sealing effect, also between the inwall of the rear portion of stop collar 5 outer wall and body 1, be embedded with seal ring 56, with and the protecting cover 92 of corrugated flexible metal tube between seal, also therefore limited the radially movable of corrugated flexible metal tube 9 simultaneously;

For convenient connection further, present embodiment also is shaped on the step 11 of an internal diameter less than corrugated flexible metal tube 9 external diameters on the inner body wall before the profile of tooth dog collar 2, like this, and when mounted, corrugated flexible metal tube 9 one can be inserted into the end, until being subjected to stopping of this step 11.

54 for to be used for testing the auxiliary hole of sealability among the figure before dispatching from the factory, and 53 is its capping sheet.

The front end of described body 1 can be designed to existing various connecting head form, and be threaded being used for as carving, as be designed to the link type being used for the sleeve rubber pipe with outside thread, or the like, these change all within protection scope of the present invention.

As shown in Figure 6, be embodiments of the invention two, only be the metal insert 41 of clamping sleeve 4 ' for being the grommet-type on plane with embodiment one difference.

As shown in Figure 7, be embodiments of the invention three, be that with embodiment one, embodiment's two difference the metal insert of the metal insert of seal ring 3 and clamping sleeve 4 unites two into one 41 ", and therefore saved elasticity lining ring 32.

In fact, no matter be the metal insert of seal ring 3 or the metal insert of clamping sleeve 4, all be the deformation power that is applied on the seal ring 3 in order to strengthen, thereby, if clamping sleeve 4 is selected suitable material for use, make its existing certain rigid so that seal ring 3 successfully produces deformation, have certain flexibility again, so that the further sealing to corrugated flexible metal tube 9 peripheries to be provided, just can save metal insert.

Claims

1, a kind of rapid pipe joint that is used for corrugated flexible metal tube, include a joint body (1), it has one can hold the jack that corrugated flexible metal tube inserts from back to front, in this jack, be disposed with profile of tooth dog collar (2) vertically from front to back, seal ring (3) and clamping sleeve (4), wherein the front-end face of profile of tooth dog collar (2) is spacing by step (12) institute that the body jack is provided with in the corresponding part, the rear portion outer circumferential face that it is characterized in that described clamping sleeve (4) is the conical surface shape that shrinks gradually, and include a stop collar (5) that inserts from back to front in the body jack, its front inner wall has the conical surface that matches with described clamping sleeve (4) rear portion periphery, the jack inwall relative fixed of its outer wall and body (1).

2, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 1, it is characterized in that described stop collar (5) outer wall has an annular groove (51), simultaneously also have an annular groove (14), make the two relative fixed by being embedded elastic metallic wire ring (6) between this a pair of annular groove in the inwall corresponding part of body (1).

3, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 2, it is characterized in that described stop collar (5) has a flange, one packing ring (7) is set between the rear end of this flange and body, and also has a darker annular groove (13) in abutting connection with ground before at the annular groove (14) of described body.

4, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 3 is characterized in that also snapping in the expanding ring (8) of a thickness greater than described packing ring (7) between the rear end of described stop collar (5) tail flange and body.

5, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 1 is characterized in that being provided with metal insert (41) at the front end of described clamping sleeve (4).

6, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 5 is characterized in that described metal insert (41) is for the grommet-type on plane or have the quarter bend fold-type in L type cross section.

7, the rapid pipe joint that is used for corrugated flexible metal tube according to claim 5, it is characterized in that being provided with metal insert (31) at the ear end face of described seal ring (3), and, between the metal insert (41) of the metal insert (31) of seal ring and clamping sleeve, be lined with the lining ring (32) of an elastic material.

8,, it is characterized in that between the inwall of the rear portion outer wall of described stop collar (5) and body (1), being embedded with seal ring (52) according to the described rapid pipe joint that is used for corrugated flexible metal tube of arbitrary claim in the claim 1 to 7.

9,, it is characterized in that being embedded a seal ring (56) at the afterbody inwall place of described stop collar (5) according to the described rapid pipe joint that is used for corrugated flexible metal tube of arbitrary claim in the claim 1 to 7.

10,, it is characterized in that on described profile of tooth dog collar (2) inner body wall before, being shaped on the step (11) of an internal diameter less than the corrugated flexible metal tube external diameter according to the described rapid pipe joint that is used for corrugated flexible metal tube of arbitrary claim in the claim 1 to 7.