Welding pipe fitting
By designing the specific structure of the welded threaded pipe and the pipe fitting body in the welded pipe fittings, and using the principle of welding wire flowing into the gap during the welding process, the problems of incomplete welding and insufficient pulling force are solved, and stronger pulling force and better sealing are achieved.
Patent Information
- Application Number
- CN202421730306.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-19
AI Technical Summary
Welded pipe fittings are prone to false welding during welding, resulting in incomplete sealing and threaded connections require greater pulling force, which can easily lead to welding failure or leakage.
A welded pipe fitting is designed, which includes a pipe fitting body, a welded threaded pipe and a corresponding welding wire. The outer wall of the welded threaded pipe is provided with a welding wire groove, a first external thread and a welding area, an internal thread and a second inner wall are provided in the mounting hole of the pipe fitting body, and a hard sealing convex ring is provided on the side of the welding wire groove away from the welding area.
The welding wire flows into the gap between the welding area and the second inner wall under the action of gravity, and the stable connection and seal between the welded threaded pipe and the pipe fitting body is achieved, thereby improving the pulling force and sealing.
Smart Images
Figure CN222925106U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe fittings, and particularly relates to a welded pipe fitting. Background Art
[0002] Welded pipe fittings play an important connecting role in water supply and gas supply pipeline systems. When welded pipe fittings are welded, false welding may occur, resulting in incomplete welding and incomplete sealing, which may cause leakage during later use; according to different use scenarios, threaded connections may appear at the welding ends. Threaded connections require greater pulling force, and ordinary welding may cause the connection to be driven by the thread during connection, resulting in welding failure, detachment or leakage.
[0003] In view of this, the present utility model is specifically proposed. Content of the Utility Model
[0004] The purpose of the present utility model is to provide a welded pipe fitting, which has strong pulling force after welding and good sealing performance.
[0005] The embodiments of the present utility model are implemented as follows:
[0006] In a first aspect, the present utility model provides a welded pipe fitting, including a pipe fitting body, at least one welded threaded pipe, and welding wires corresponding to the number of welded threaded pipes;
[0007] The pipe fitting body has mounting holes corresponding to the number of welded threaded pipes. Each mounting hole has a first inner wall and a second inner wall connected to each other, and an internal thread is provided on the first inner wall;
[0008] On the outer wall of each welded threaded pipe, a first external thread, a welding area, and a welding wire groove are sequentially arranged from the end in the length direction, and the welding wire is arranged in the welding wire groove;
[0009] When each welded threaded pipe is assembled in the pipe fitting body, the first external thread, the welding area, and the welding wire groove are all located in the corresponding mounting hole, and the internal thread and the first external thread are connected through thread matching to realize the connection between the pipe fitting body and the welded threaded pipe.
[0010] In an optional embodiment, a hard sealing convex ring is provided on one side of the welding wire groove away from the welding area;
[0011] The second inner wall extends to the end face of the pipe fitting body, and a sharp corner structure is formed at the intersection of the second inner wall and the end face of the pipe fitting body;
[0012] A sealing notch for accommodating the sharp corner structure is formed in a circle on the side of the hard sealing convex ring facing the welding wire groove from its circumferential surface. After the sealing notch is formed, an inclined annular surface is correspondingly formed on the hard sealing convex ring, and the distance from the inclined annular surface to the axis of the mounting hole becomes smaller as it gets closer to the welding wire groove;
[0013] When the welded threaded pipe is arranged in the installation hole, the sharp corner structure abuts against the inclined annular surface.
[0014] In an alternative embodiment, the cross-sectional shape of the sealing notch on the axis passing through the installation hole is trapezoidal, and the inclined annular surface corresponds to the waist of the trapezoid.
[0015] In an alternative embodiment, the material of the pipe fitting body and / or the welded threaded pipe is metal.
[0016] In an alternative embodiment, the material of the pipe fitting body and / or the welded threaded pipe is brass.
[0017] In an alternative embodiment, the welding wire is a tin electrode or a silver electrode.
[0018] In an alternative embodiment, the groove wall of the welding wire groove close to the welding area is an inclined surface.
[0019] In an alternative embodiment, a second external thread is provided on the outer wall of the welded threaded pipe away from the first external thread.
[0020] In an alternative embodiment, the pipe fitting body is a tee, a cross, a four-way or an elbow.
[0021] The beneficial effects of the embodiments of the present utility model are as follows:
[0022] For the welded pipe fitting provided by the embodiments of the present utility model, due to the arrangement of the welding wire groove and the first external thread on the welded threaded pipe, and the specific arrangement of the installation hole of the pipe fitting body, when the welded pipe fitting is used, the molten welding liquid flows into the gap between the welding area and the second inner wall under the action of gravity, so that the welded threaded pipe and the pipe fitting body form a welded connection and a welded seal, thereby making the connection between the welded threaded pipe and the pipe fitting body have a stronger pulling force. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.
[0024] Figure 1 It is a schematic structural diagram of the welded pipe fitting provided by the embodiments of the present utility model;
[0025] Figure 2 It is an exploded view of the welded pipe fitting provided by the embodiments of the present utility model;
[0026] Figure 3 It is a cross-sectional view of the welded pipe fitting provided by the embodiments of the present utility model;
[0027] Figure 4 is Figure 3 a sectional view of the pipe fitting body in
[0028] Figure 5 is Figure 3 a sectional view of the welded threaded pipe in
[0029] Figure 6 is Figure 3 an enlarged view of area A in
[0030] Icon: 100 - welded pipe fitting; 110 - pipe fitting body; 111 - mounting hole; 112 - first inner wall; 113 - second inner wall; 114 - sharp corner structure; 120 - welded threaded pipe; 121 - first external thread; 122 - welding area; 123 - welding wire groove; 124 - second external thread; 130 - welding wire; 140 - hard seal ring; 141 - seal notch; 142 - inclined annular surface. Specific embodiments
[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.
[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.
[0033] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0034] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.
[0035] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0036] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0037] As Figure 1 and Figure 2 shown, the welded pipe fitting 100 provided by the embodiment of the present utility model includes a pipe fitting body 110, at least one welded threaded pipe 120, and welding wires 130 corresponding to the number of the welded threaded pipes 120;
[0038] As Figures 2 to 4 shown, the pipe fitting body 110 has mounting holes 111 corresponding to the number of the welded threaded pipes 120. Each mounting hole 111 has a first inner wall 112 and a second inner wall 113 that are connected to each other, and an internal thread is provided on the first inner wall 112;
[0039] As Figure 5 shown, on the outer wall of each welded threaded pipe 120, a first external thread 121, a welding area 122, and a welding wire groove 123 are sequentially provided from the end in the length direction, and the welding wire 130 is arranged in the welding wire groove 123;
[0040] When each welded threaded pipe 120 is assembled within the pipe fitting body 110, the first external thread 121, the welding area 122, and the welding wire groove 123 are all located within the corresponding mounting hole 111, and the internal thread and the first external thread 121 are thread - mated to achieve the connection between the pipe fitting body 110 and the welded threaded pipe 120.
[0041] The usage method of the welded pipe fitting 100 provided by the embodiment of the present utility model is as follows:
[0042] Place the welding wire 130 within the welding wire groove 123;
[0043] Insert the welded threaded pipe 120 into the mounting hole 111, and by screwing the welded threaded pipe 120, the first external thread 121 and the internal thread are thread - mated to achieve the preliminary connection between the welded threaded pipe 120 and the pipe fitting body 110;
[0044] Heat the position of the pipe fitting body 110 corresponding to the welding wire 130 to melt the welding wire 130. The melted welding liquid flows into the gap between the welding area 122 and the second inner wall 113 under the action of gravity, so that the welded threaded pipe 120 and the pipe fitting body 110 form a welded connection and a welded seal, thereby enabling the connection between the welded threaded pipe 120 and the pipe fitting body 110 to have a stronger pulling force.
[0045] Therefore, for the welded pipe fitting 100 provided by the present utility model, after heating the position where the welding wire 130 is provided, a stable connection between the welded threaded pipe 120 and the pipe fitting body 110 can be achieved, and after connection, it has good sealing performance and a stronger pulling force.
[0046] Optionally, as Figure 3 and Figure 6 shown, a hard - seal convex ring 140 is provided on the side of the welding wire groove 123 away from the welding area 122;
[0047] The second inner wall 113 extends to the end face of the pipe fitting body 110, and a sharp - angle structure 114 is formed at the junction of the second inner wall 113 and the end face of the pipe fitting body 110;
[0048] The hard - seal convex ring 140 is provided with a sealing notch 141 for accommodating the sharp - angle structure 114 on the side facing the welding wire groove 123 starting from its circumferential surface. After the sealing notch 141 is opened, an inclined annular surface 142 is formed on the hard - seal convex ring 140, and the distance from the inclined annular surface 142 to the axis of the mounting hole 111 is smaller closer to the welding wire groove 123;
[0049] When the welded threaded pipe 120 is arranged in the mounting hole 111, the sharp - angle structure 114 abuts against the inclined annular surface 142.
[0050] During the process of connecting the welded threaded pipe 120 to the pipe fitting body 110 through the first external thread 121 and the internal thread, as the welded threaded pipe 120 is screwed, the sharp corner structure 114 abuts against the inclined annular surface 142, and as the welded threaded pipe 120 continuously penetrates into the installation hole 111, the sharp corner structure 114 abuts against the inclined annular surface 142 more tightly, so that the sealing performance of the connection between the welded threaded pipe 120 and the pipe fitting body 110 is better. When the welded threaded pipe 120 is screwed to the end, the sharp corner structure 114 abuts most tightly, and the sealing performance of the connection between the welded threaded pipe 120 and the pipe fitting body 110 reaches the best.
[0051] Further, the shape of the cross-section of the sealing notch 141 on the axis passing through the installation hole 111 is trapezoidal, and the inclined annular surface 142 corresponds to the waist of the trapezoid.
[0052] Optionally, as Figure 3 shown, the groove wall of the welding wire groove 123 close to the welding area 122 is an inclined surface.
[0053] The above setting of the welding wire groove 123 facilitates the outflow of the welding wire 130 after melting from the welding wire groove 123, and avoids the retention of the welding liquid in the welding wire groove 123.
[0054] Further, as Figure 3 and Figure 5 shown, a second external thread 124 is provided on the outer wall of the welded threaded pipe 120 away from the first external thread 121.
[0055] The second external thread 124 of the welded threaded pipe 120 is used to connect with other threaded pipes in the pipeline system.
[0056] Optionally, the material of the pipe fitting body 110 and / or the welded threaded pipe 120 is metal.
[0057] Further, the material of the pipe fitting body 110 and / or the welded threaded pipe 120 is brass.
[0058] Optionally, the material of the welding wire 130 is tin electrode or silver electrode.
[0059] The welding wire 130 of the above material can achieve the sealed welding of the pipe fitting body 110 and the welded threaded pipe 120, and make the connection have a stronger pulling force.
[0060] It should be noted that the welded pipe fitting 100 provided in the embodiment of the present utility model as shown in the attached drawings belongs to a two-way structure. In other embodiments of the present utility model, the pipe fitting body 110 can also be a three-way, four-way or elbow. In addition, the welded pipe fitting 100 provided in the embodiment of the present utility model as shown in the attached drawings only includes one welded threaded pipe 120. One interface of the two-way corresponds to an installation hole, and the other interface has a conventional structure. In other embodiments of the present utility model, for a two-way, three-way, four-way or elbow, it can include 2 welded threaded pipes 120, or for a three-way or four-way, it can include 3 welded threaded pipes 120, or for a four-way, it can include 4 welded threaded pipes 120.
[0061] In summary, for the welded pipe fitting 100 provided in the embodiment of the present utility model, due to the arrangement of the welding wire groove 123 and the first external thread 121 on the welded threaded pipe 120, and the specific arrangement of the installation hole 111 of the pipe fitting body 110, when the welded pipe fitting 100 is in use, the melted welding liquid flows into the gap between the welding area 122 and the second inner wall 113 under the action of gravity, so that the welded threaded pipe 120 and the pipe fitting body 110 form a welded connection and a welded seal, thereby making the connection between the welded threaded pipe 120 and the pipe fitting body 110 have a stronger pulling force.
[0062] In a preferred embodiment, the arrangement of the sharp angle structure 114 on the pipe fitting body 110 and the arrangement of the inclined annular surface 142 on the welded threaded pipe 120 can achieve a hard seal connection of the pipe fitting, realizing double seals of welded seal and hard seal of the pipe fitting, and further improving the sealing performance of the pipe fitting connection.
[0063] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A welded pipe fitting, characterized in that: It comprises a pipe body, at least one welded threaded pipe and welding wires corresponding to the number of the welded threaded pipes; The pipe body has mounting holes corresponding to the number of the welded threaded pipes, each of the mounting holes has a first inner wall and a second inner wall connected to each other, and the first inner wall is provided with an internal thread; The outer wall of each of the welded threaded pipes is provided with a first external thread, a welding area and a welding wire groove in sequence from the end in the length direction, and the welding wire is arranged in the welding wire groove; When each of the welded threaded tubes is assembled in the pipe body, the first external thread, the welding area and the welding wire groove are all located in the corresponding mounting hole, and the internal thread and the first external thread are threadedly matched to achieve the connection between the pipe body and the welded threaded tube.
2. The welded pipe fitting according to claim 1, characterized in that: A hard sealing convex ring is provided on one side of the welding wire slot away from the welding area; The second inner wall extends to the end surface of the pipe body, and a circle of sharp angle structure is formed at the intersection of the second inner wall and the end surface of the pipe body; The hard sealing convex ring is provided with a sealing notch for accommodating the pointed structure on the side facing the welding wire groove from the circumference thereof, and after the sealing notch is provided, a circle of inclined annular surface is correspondingly formed on the hard sealing convex ring, and the distance between the inclined annular surface and the axis of the mounting hole is smaller as it is closer to the welding wire groove; When the welded threaded pipe is arranged in the mounting hole, the pointed structure abuts against the inclined annular surface.
3. The welded pipe fitting according to claim 2, characterized in that: The cross-section of the sealing notch on the axis passing through the mounting hole is in the shape of a trapezoid, and the inclined annular surface corresponds to the waist of the trapezoid.
4. The welded pipe fitting according to claim 1, characterized in that: The pipe body and / or the welded threaded pipe are made of metal.
5. The welded pipe fitting according to claim 4, characterized in that: The material of the pipe fitting body and / or the welded threaded pipe is brass.
6. The welded pipe fitting according to claim 4, characterized in that: The welding wire is a tin welding rod or a silver welding rod.
7. The welded pipe fitting according to claim 1, characterized in that: The groove wall of the welding wire groove close to the welding area is an inclined surface.
8. The welded pipe fitting according to claim 1, characterized in that: The outer wall of the welded threaded pipe away from the first outer thread is provided with a second outer thread.
9. The welded pipe fitting according to claim 1, characterized in that: The pipe fitting body is a two-way, three-way, four-way or elbow.