CN2851784Y

CN2851784Y - Quick locking type connection structure of thin-walled metal pipe fitting

Info

Publication number: CN2851784Y
Application number: CN 200620032108
Authority: CN
Inventors: 卜莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-05-20
Filing date: 2006-05-20
Publication date: 2006-12-27
Anticipated expiration: 2016-05-20

Abstract

The purpose of the utility model is to provide a quick locking type connection structure of a thin wall metallic pipe fitting with the advantages of firm connection, good sealing property, raw material saving, shapely figure, easy and quick locking, easy maintenance and transformation. The utility model comprises a pipe fitting joint, a pipe, a sealing ring, an external pressure screw cap, and a top pressure ring, wherein the inner wall on the connection end of the pipe fitting joint is provided with a step hole in the pipe, a convex ring groove and a step hole in the top pressure ring in sequence from the inner side to the outer side. The outside of the end part of the connection end of the pipe fitting joint is provided with a screw thread outer connection opening, and the connection end of the pipe and the outer wall of the pipe project to form a loop of top push convex ring. The pipe is sheathed with the top pressure ring and is arranged inside the pipe fitting joint, and the external pressure screw cap arranged on the pipe quickly locks the pipe and is connected with the pipe fitting joint. The structure has the advantages of tension resistance, high pressure resistance strength and good sealing property. The thin wall metallic pipe fitting used causes the raw materials of steel raw material to be reduced to one third of the homogeneous structure. The utility model has the advantages low cost and shapely figure and is chiefly applied to the water supply industry, the drinking water industry, or the fluid delivery industry.

Description

A kind of thin-wall metal pipe quick-locking connection structure

Technical field

The utility model relates to a kind of linkage structure of metal pipe element, further, relates to a kind of thin-wall metal pipe quick-locking connection structure.

Background technique

In recent years, it is flourishing that the pipeline manufacturing industry is progressively being moved towards, and the use of conventional pipelines and link thereof is refinement step by step, and its Placement is made a lot of variety especially, is threaded usually or the groove type connection; Be connected firmly for reaching, closely, non-leakage purpose, generally need reprocess pipe fitting end, promptly open hinge screw thread or open channels at the port of pipe fitting, so that be connected with internal thread or groove, so just damage, weakened the intensity of pipe fitting end, for this reason, when producing pipe fitting, because worm tooth and groove have the certain height or the degree of depth, the wall thickness of pipe fitting just need be reserved as the surplus of machining screw tooth or groove, these cause the whole wall thickness of pipe fitting to be much higher than the size that real fluid pressure sets, it is actual needed wall thickness, design limiting just because of linkage structure, require processed pipe fitting that certain intensity will be arranged, promptly certain wall thickness to be arranged, in addition, pipe fitting during fabrication, tube material is wasted in a large number, this has increased cost of material virtually, has raised the market price of product, and, above Placement installation difficulty is bigger, the construction process more complicated, the pipe fitting processing technology is numerous and diverse, and these problems all make traditional pipe fitting joint structure be difficult to satisfy the vertiginous market demand.

In order to solve the cost height that the conventional pipelines linkage structure exists, the processing trouble, problems such as difficulty of construction is big, part thin-wall metal pipe linkage structure has appearred on the market successively, its linkage structure mainly is clamp-press type or ring pressure type, such linkage structure greatly reduces the use amount of pipe fitting steel, reduced waste, but such linkage structure is because of the self structure reason, there is following shortcoming again: 1, this kind linkage structure adopts thin-wall metal pipe, and adopt card to press or ring pressure Placement, in when construction; the metal body of the metal pipe element of thin-walled and thin-walled is extruded distortion simultaneously and forms this linkage structure; make that the own intensity of metal body of the metal pipe element of thin-walled and thin-walled is destroyed; damage, cause connectivity robustness; sealing; resistance to pressure is reliable inadequately; 2, the Placement that card is pressed or ring is pressed causes caliber to dwindle distortion, has reduced the latus rectum of body, has reduced the body flow; 3, card is pressed or ring is pressed the installation specification height of Placement, and difficulty is big, is not easy to grasp, and installs and not in placely is easy to occur that body is loosening, leakage, situation such as not withstand voltage, thereby cause the reduction in working life of pipe fitting joint structure; 4, the Placement that card is pressed or ring is pressed is the once-through structure, can't safeguard, is difficult for transforming again, in case quality problems occur or transform problem again, is not easy to solve very much; 5, the joint lines are not smooth, and the external form little rough lacks aesthetic feeling; 6, the pipe fitting processing technology is complicated, and design falls behind.

More than the problem of Cun Zaiing in actual applications, has exposed its fatal shortcoming gradually, in the course of time, will bring inconvenience to the user.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of and be connected firmly, good seal performance, can save raw material, beautiful shape in a large number, be easy to quick locking, be easy to the thin-wall metal pipe quick-locking connection structure safeguarding and transform.

Goal of the invention of the present utility model is to realize by following technological scheme:

A kind of thin-wall metal pipe quick-locking connection structure, comprise pipe fitting joint 1, body 2, seal ring 3 and external compression nut 10, external compression nut 10 caps are provided with body perforation 11, this quick-locking connection structure also includes the roof pressure ring 9 in order to roof pressure seal ring 3, the inwall of described pipe fitting joint 1 connecting end is by lining and outer being disposed with in order to shoulder hole 4 in the body that plugs body 2, in order to bulge loop groove 5 that seal ring 3 is set with in order to shoulder hole 6 in the roof pressure ring that plugs roof pressure ring 9, the connecting end end arranged outside of described pipe fitting joint 1 has screw thread external tapping 7, the connecting end tube wall protuberance of described body 2 forms a circle pushing tow bulge loop 8, wherein, seal ring 3 is arranged in the bulge loop groove 5, roof pressure ring 9 is arranged in the interior shoulder hole 6 of roof pressure ring, external compression nut 10 is set on the body 2, pushing tow bulge loop 8 rear ends, the end body of the connecting end of body 2 passes roof pressure ring 9 and is arranged in the body of pipe fitting joint 1 in the shoulder hole 4, the setting that matches with the screw thread external tapping 7 of pipe fitting joint 1 of external compression nut 10 on the body 2, the cap pushing tow of external compression nut 10 is in pushing tow bulge loop 8 rear ends of body 2, pushing tow bulge loop 8 front end pushing tows are on roof pressure ring 9, roof pressure ring 9 crush seal circles 3 and constitute thin-wall metal pipe quick-locking connection structure with this on body 2;

Pushing tow bulge loop 8 outside diameter of described body 2 are greater than the diameter of shoulder hole 6 in the roof pressure ring, pushing tow bulge loop 8 front ends of described body 2 and the axial length of its connecting port are less than or equal to interior shoulder hole 4 far-ends of pipe fitting joint 1 and the axial length of its connecting port, and described roof pressure ring 9 axial lengths are greater than shoulder hole 6 axial lengths in the roof pressure ring;

Pushing tow bulge loop 8 outside diameter of described body 2 are less than or equal to the diameter of shoulder hole 6 in the roof pressure ring, pushing tow bulge loop 8 rear ends of described body 2 and the axial length of its connecting port are less than or equal to interior shoulder hole 4 far-ends of pipe fitting joint 1 and the axial length of its connecting port, and the axial length sum of described roof pressure ring 9 and pushing tow bulge loop 8 is greater than the axial length of shoulder hole 6 in the roof pressure ring;

Described pipe fitting joint 1 inwall is to be made by the expansion of thin-wall metal inner tube wall by shoulder hole 6 in shoulder hole 4, bulge loop groove 5 and the roof pressure ring in lining and the outer body that sets gradually, and described screw thread external tapping 7 is to be made by the tube wall roller system coarse-pitch thread of pipe fitting joint 1;

The screw thread of described screw thread external tapping 7 is the coarse-pitch thread of recessed tube wall or the coarse-pitch thread that protrudes tube wall;

In described external compression nut 10 caps coarse-pitch thread 12 is set, external compression nut 10 is to be made by thin metallic tubd, and coarse-pitch thread 12 is to be made by thin-wall metal tube wall roller system coarse-pitch thread, and coarse-pitch thread 12 is the coarse-pitch thread of recessed tube wall or the coarse-pitch thread that protrudes tube wall;

Described external compression nut 10 is to be made by thin metallic tubd, is shaped on some coarse-pitch thread projectioies at the threaded line top roll of thin-wall metal tube wall, and the coarse-pitch thread projection is the coarse-pitch thread projection of recessed tube wall or the coarse-pitch thread projection of protruding tube wall;

Described pipe fitting joint 1 body is straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend; Described pipe fitting joint 1 body is threeway branch pipe or equal tee or reducing tee or straight cross or reducing cross; The pipe connection mouth of described straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend or threeway branch pipe or equal tee or reducing tee or straight cross or reducing cross is the end of outside thread or internal thread or thin-wall metal pipe quick-locking connection structure.

The utility model has substantive distinguishing features and progressive with respect to prior art, specifically, following beneficial effect is arranged:

1, thin-wall metal pipe quick-locking connection structure described in the utility model, its characteristics are:

A: the roof pressure ring that is adopted makes seal ring roof pressure tightly on body, has strengthened the sealability of this linkage structure and tension, compressive strength, and against shock, high pressure resistant;

B: the coarse-pitch thread external compression nut that is adopted not only can carry out quick locking with the coarse-pitch thread port of pipe fitting joint and be connected, and the pushing tow bulge loop that can give body is with jacking force, and this jacking force can prevent that body under high pressure is forced out pipe fitting joint;

Constantly test and the many-side test through the claimant, find this linkage structure in like product, its tension, compressive strength height, good seal performance, and against shock, high pressure resistant are more suitable in quick connection, and are difficult for after connecting rotating, being difficult for breaking away from;

2, the pipe fitting joint that linkage structure of the present utility model adopted, body and roof pressure ring all are to be made by thin-wall metal pipe, even connect fast that the external compression nut of locking usefulness can be to be made by thin-wall metal pipe, but its connectivity robustness, sealing, tensile strength and compressive strength are better than product of the same type; Through measuring and calculating, the employed steel raw material of the thin-wall metal pipe goods that the utility model adopted only is 1/3rd of a like product, in other words, its cost only has the very little part of like product, and it has the market competition advantage of immeasurable low cost, low cost;

3, each parts of this linkage structure itself need not carry out damaging reprocessing, the wall thickness of each parts more must not set according to specific (special) requirements, promptly need not reserve the machining allowance of each parts, and each parts of this linkage structure need only be shaped and can use by diffusion, Comparatively speaking, this makes the metal consumptive material of each parts greatly reduce, and production technology is few, cost of production is little, and processing is simple;

What 4, each parts of this linkage structure adopted is the thin-wall metal pipe goods, and it is aesthetic in appearance generous, and it is happy to connect effect, gives a kind of integrated beauty of people;

5, each parts of this linkage structure can freely be dismantled, install, and have solved the problem that existing thin-wall metal pipe linkage structure is not easy to safeguard or transform again;

6, the Placement of this linkage structure does not make the flow of body reduce, and has guaranteed the transfusion ability of body.

Description of drawings

Fig. 1 is the sectional structure schematic representation of pipe fitting joint described in the utility model;

Fig. 2 is the sectional structure schematic representation of seal ring described in the utility model;

Fig. 3 is the sectional structure schematic representation of roof pressure ring described in the utility model;

Fig. 4 is the sectional structure schematic representation of body described in the utility model;

Fig. 5 is one of sectional structure schematic representation of external compression nut described in the utility model;

Fig. 6 is one of sectional structure schematic representation of thin-wall metal pipe quick-locking connection structure described in the utility model;

Fig. 7 be thin-wall metal pipe quick-locking connection structure described in the utility model the sectional structure schematic representation two;

Fig. 8 is one of broken section structural representation of pipe fitting joint described in the utility model;

Fig. 9 be pipe fitting joint described in the utility model the broken section structural representation two;

Figure 10 be external compression nut described in the utility model the sectional structure schematic representation two;

Figure 11 be external compression nut described in the utility model the sectional structure schematic representation three;

Figure 12 is the structural representation of seal ring described in the utility model;

Figure 13 is the sectional structure schematic representation with equal tee of thin-wall metal pipe quick-locking connection structure described in the utility model.

Embodiment

For concrete technical characteristics of the utility model and tangible advantage further are described, provide embodiment of the present utility model below in conjunction with accompanying drawing:

As shown in Figure 6 and Figure 7, a kind of thin-wall stainless steel pipe fitting quick-locking connection structure includes thin-wall stainless steel pipe fitting joint 1, thin-wall stainless steel body 2, seal ring 3, stainless steel external compression nut 10 and in order to the thin-wall stainless steel roof pressure ring 9 of roof pressure seal ring 3;

As Fig. 1, Fig. 8 and shown in Figure 9, the inwall of described thin-wall stainless steel pipe fitting joint 1 connecting end is by lining and outer being disposed with in order to shoulder hole 4 in the body that plugs thin-wall stainless steel body 2, in order to bulge loop groove 5 that seal ring 3 is set with in order to shoulder hole 6 in the roof pressure ring that plugs roof pressure ring 9, and the connecting end end arranged outside of described thin-wall stainless steel pipe fitting joint 1 has screw thread external tapping 7;

As Fig. 2 and shown in Figure 12, described seal ring 3 is corrosion resistant, resilient rubber products, and it is shaped as circular, and its cross section is between semicircle shape and 3/4ths circle shapes, and being beneficial to has bigger area of contact with thin-wall stainless steel body 2 outer walls;

As shown in Figure 3, described thin-wall stainless steel roof pressure ring 9 is to be made by one section thin-wall stainless steel metal tube;

As shown in Figure 4, the connecting end of described thin-wall stainless steel body 2 protuberance forms a circle pushing tow bulge loop 8;

As Fig. 5, Figure 10 and shown in Figure 11, described stainless steel external compression nut 10 caps are provided with body perforation 11, and the nut inwall is provided with the screw thread that matches with the screw thread external tapping 7 of the connecting end end arranged outside of described thin-wall stainless steel pipe fitting joint 1;

As shown in Figure 6 and Figure 7; Sealing ring 3 is arranged in the bulge loop groove 5 of thin-wall stainless steel pipe fitting joint 1; Thin-wall stainless steel roof pressure ring 9 is arranged in the interior shoulder hole 6 of roof pressure ring of thin-wall stainless steel pipe fitting joint 1; Thin-wall stainless steel roof pressure ring 9 one ends top is located on the sealing ring 3; Stainless steel external compression nut 10 is set in the rear end of thin-wall stainless steel body 2 pushing tow bulge loops 8 by self body perforation 11; The end body of the link of thin-wall stainless steel body 2 passes thin-wall stainless steel roof pressure ring 9 and is arranged in the body of pipe fitting joint 1 in the shoulder hole 4; Pushing tow bulge loop 8 pushing tows of thin-wall stainless steel body 2 are on the other end of thin-wall stainless steel roof pressure ring 9; The power that matches and produced with the stainless steel external compression nut 10 on the thin-wall stainless steel body 2 and the screw thread external tapping 7 of thin-wall stainless steel pipe fitting joint 1; This power causes pushing tow bulge loop 8 one sides of stainless steel external compression nut 10 cap pushing tow thin-wall stainless steel bodys 2; And then cause pushing tow bulge loop 8 opposite side pushing tow thin-wall stainless steel roof pressure rings 9; At last; Thin-wall stainless steel roof pressure ring 9 crush seal circles 3 and consist of thin-wall stainless steel pipe fitting quick-locking connection structure with this on thin-wall stainless steel body 2;

Thin-wall stainless steel pipe fitting joint 1 and thin-wall stainless steel body 2, thin-wall stainless steel pipe fitting joint 1 and thin-wall stainless steel roof pressure ring 9, thin-wall stainless steel body 2 and thin-wall stainless steel roof pressure ring 9, tolerance fit is provided with mutually, it mainly is beneficial to and is connected firmly, and is beneficial to sealability, is beneficial to high pressure resistant impact.

As shown in Figure 6; pushing tow bulge loop 8 outside diameter of thin-wall stainless steel body 2 are greater than the diameter of shoulder hole 6 in the roof pressure ring; pushing tow bulge loop 8 front ends of described thin-wall stainless steel body 2 and the axial length of its connecting port are less than or equal to interior shoulder hole 4 far-ends of described thin-wall stainless steel pipe fitting joint 1 and the axial length of its connecting port, described thin-wall stainless steel roof pressure ring 9 axial lengths are not less than shoulder hole 6 axial lengths in the roof pressure ring;

As shown in Figure 7; pushing tow bulge loop 8 outside diameter of thin-wall stainless steel body 2 are less than or equal to the diameter of shoulder hole 6 in the roof pressure ring; pushing tow bulge loop 8 rear ends of described thin-wall stainless steel body 2 and the axial length of its connecting port are less than or equal to interior shoulder hole 4 far-ends of described thin-wall stainless steel pipe fitting joint 1 and the axial length of its connecting port, the axial length sum of described thin-wall stainless steel roof pressure ring 9 and pushing tow bulge loop 8 is not less than the axial length of shoulder hole 6 in the roof pressure ring;

As shown in Figure 1, described thin-wall stainless steel pipe fitting joint 1 inwall is that expansion is made to thin-wall stainless steel pipe fitting joint 1 inwall by shoulder hole 6 in shoulder hole 4, bulge loop groove 5 and the roof pressure ring in lining and the outer body that sets gradually;

As Fig. 8 and shown in Figure 9, the screw thread of described thin-wall stainless steel pipe fitting joint 1 connecting port is that thin-wall stainless steel pipe fitting joint 1 tube wall roller system coarse-pitch thread is made, this coarse-pitch thread can be single head or bull coarse-pitch thread, and this coarse-pitch thread can be indent screw thread or outer convex thread;

As shown in Figure 5, described stainless steel external compression nut 10 is stainless steel cast members, and its outer surface carries out polishing treatment, and its inwall is single head or bull coarse-pitch thread, itself and the supporting use of screw thread of corresponding thin-wall stainless steel pipe fitting joint 1 connecting port;

As shown in Figure 10 and Figure 11, described stainless steel external compression nut 10 is that thin-wall stainless steel tube wall roller system coarse-pitch thread is made, its inwall is provided with single head or bull coarse-pitch thread, this coarse-pitch thread can be indent screw thread or outer convex thread, itself and the supporting use of screw thread of corresponding thin-wall stainless steel pipe fitting joint 1 connecting port;

Described stainless steel external compression nut 10 is that thin-wall stainless steel tube wall coarse-pitch thread line top roll system thread protrusion is made, the single head of wall or bull coarse-pitch thread line are provided with thread protrusion within it, this thread protrusion can be indent thread protrusion or evagination thread protrusion, itself and the supporting use of screw thread of corresponding thin-wall stainless steel pipe fitting joint 1 connecting port.

Described thin-wall stainless steel pipe fitting joint 1 body is straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend; The pipe connection mouth of described straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend is an outside thread or for internal thread or be the end of thin-wall stainless steel pipe fitting quick-locking connection structure.

Described thin-wall stainless steel pipe fitting joint 1 body is threeway branch pipe or reducing tee or straight cross or reducing cross; The pipe connection mouth of described threeway branch pipe or reducing tee or straight cross or reducing cross is outside thread or is internal thread or be the end of thin-wall stainless steel pipe fitting quick-locking connection structure.

As shown in figure 13, described thin-wall stainless steel pipe fitting joint 1 body is an equal tee, and its connection mouth is the port of outside thread 13 interfaces and two thin-wall stainless steel pipe fitting quick-locking connection structures.

The thin-wall stainless steel pipe fitting quick-locking connection structure that the utility model adopted, make sealability and connectivity robustness obtain sufficient assurance, simultaneously, this structural design is ingenious, easy processing, the easy row of connecting part, long service life is easy to safeguard, transform, the more important thing is that it can save a large amount of production raw material, its cost is greatly reduced, and sales price declines to a great extent, and market is easier to accept.

Claims

1, a kind of thin-wall metal pipe quick-locking connection structure, comprise pipe fitting joint (1), body (2), seal ring (3) and external compression nut (10), external compression nut (10) cap is provided with body perforation (11), it is characterized in that: this quick-locking connection structure also includes the roof pressure ring (9) in order to roof pressure seal ring (3), the inwall of described pipe fitting joint (1) connecting end is by lining and outer being disposed with in order to shoulder hole (4) in the body that plugs body (2), in order to bulge loop groove (5) that seal ring (3) is set with in order to shoulder hole (6) in the roof pressure ring that plugs roof pressure ring (9), the connecting end end arranged outside of described pipe fitting joint (1) has screw thread external tapping (7), the connecting end tube wall protuberance of described body (2) forms a circle pushing tow bulge loop (8), wherein, seal ring (3) is arranged in the bulge loop groove (5), roof pressure ring (9) is arranged in the interior shoulder hole (6) of roof pressure ring, external compression nut (10) is set on the body (2), pushing tow bulge loop (8) rear end, the end body of the connecting end of body (2) passes roof pressure ring (9) and is arranged in the body of pipe fitting joint (1) in the shoulder hole (4), the setting that matches with the screw thread external tapping (7) of pipe fitting joint (1) of external compression nut (10) on the body (2), the cap pushing tow of external compression nut (10) is in pushing tow bulge loop (8) rear end of body (2), pushing tow bulge loop (8) front end pushing tow is on roof pressure ring (9), roof pressure ring (9) crush seal circle (3) and constitutes thin-wall metal pipe quick-locking connection structure with this on body (2).

2, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1, it is characterized in that: pushing tow bulge loop (8) outside diameter of described body (2) is greater than the diameter of shoulder hole (6) in the roof pressure ring, pushing tow bulge loop (8) front end of described body (2) and the axial length of its connecting port are less than or equal to interior shoulder hole (4) far-end of body of pipe fitting joint (1) and the axial length of its connecting port, and described roof pressure ring (9) axial length is greater than shoulder hole (6) axial length in the roof pressure ring.

3, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1, it is characterized in that: pushing tow bulge loop (8) outside diameter of described body (2) is less than or equal to the diameter of shoulder hole (6) in the roof pressure ring, pushing tow bulge loop (8) rear end of described body (2) and the axial length of its connecting port are less than or equal to interior shoulder hole (4) far-end of body of pipe fitting joint (1) and the axial length of its connecting port, and the axial length sum of described roof pressure ring (9) and pushing tow bulge loop (8) is greater than the axial length of shoulder hole (6) in the roof pressure ring.

4, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1, it is characterized in that: described pipe fitting joint (1) inwall is to be made by the expansion of thin-wall metal inner tube wall by shoulder hole (6) in shoulder hole (4), bulge loop groove (5) and the roof pressure ring in lining and the outer body that sets gradually, and described screw thread external tapping (7) is to be made by the tube wall roller system coarse-pitch thread of pipe fitting joint (1).

5, according to claim 1 or 4 described a kind of thin-wall metal pipe quick-locking connection structures, it is characterized in that: the screw thread of described screw thread external tapping (7) is the coarse-pitch thread of recessed tube wall or the coarse-pitch thread that protrudes tube wall.

6, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1, it is characterized in that: in described external compression nut (10) cap coarse-pitch thread (12) is set, external compression nut (10) is to be made by thin metallic tubd, coarse-pitch thread (12) is to be made by thin-wall metal tube wall roller system coarse-pitch thread, and coarse-pitch thread (12) is the coarse-pitch thread of recessed tube wall or the coarse-pitch thread that protrudes tube wall.

7, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1, it is characterized in that: described external compression nut (10) is to be made by thin metallic tubd, threaded line top roll at the thin-wall metal tube wall is shaped on some coarse-pitch thread projectioies, and the coarse-pitch thread projection is the coarse-pitch thread projection of recessed tube wall or the coarse-pitch thread projection of protruding tube wall.

8, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1 is characterized in that: described pipe fitting joint (1) body is straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend.

9, a kind of thin-wall metal pipe quick-locking connection structure according to claim 1 is characterized in that: described pipe fitting joint (1) body is threeway branch pipe or equal tee or reducing tee or straight cross or reducing cross.

10, according to Claim 8 or 9 described a kind of thin-wall metal pipe quick-locking connection structures, it is characterized in that: the pipe connection mouth of described straight tube or 45 ° of bend pipes or 90 ° of bend pipes or iso-diameter elbow or reducing bend or threeway branch pipe or equal tee or reducing tee or straight cross or reducing cross is the end of outside thread or internal thread or thin-wall metal pipe quick-locking connection structure.