A welded pipe fitting unit

Abstract

This utility model belongs to the field of pipe fitting technology, specifically referring to a welded pipe fitting unit, which includes: a first fitting having a first welding end and a first connecting end for connecting to a first mounting component; a second fitting having a second welding end for adapting to the first welding end and a second connecting end for connecting to a second mounting component, the second connecting end having an anti-rotation groove; and a positioning clip for detachably being disposed between the second fitting and the second mounting component; wherein the first welding end and the second welding end can be welded at different circumferential positions. After the first fitting of this utility model is installed to the second fitting, its circumferential installation angle can be flexibly adjusted according to the position of the anti-rotation groove, and after welding and fixing, it forms a female fitting with a specific angle. This method does not require additional mold opening, and products with multiple circumferential installation angles can be manufactured under existing production conditions. Compared with re-molding, it significantly reduces development costs and shortens the project cycle.

Description

Technical Field

[0001] This utility model belongs to the field of pipe fittings technology, and specifically refers to a welded pipe fitting unit. Background Technology

[0002] In the field of new energy vehicles, the circumferential rotation of pipe joints must be strictly limited to suppress the damage caused by vibration. For this purpose, male and female joints are typically designed with a mating structure of anti-rotation keys and keyways. However, a practical contradiction arises: large automotive components with male joints are designed and manufactured by upstream suppliers, and the position of their anti-rotation keys is determined before production. Because upstream designers cannot fully predict the final installation environment and surrounding layout of this large automotive component in the vehicle, the preset orientation of the anti-rotation key often conflicts with the actual pipe routing. During downstream assembly, it is frequently found that the anti-rotation groove position of the standard female joint cannot allow for smooth pipe routing, or even makes installation impossible. To solve this problem, it is necessary to redevelop customized female joints, which significantly increases additional development costs and extends the project cycle. Utility Model Content

[0003] The purpose of this invention is to provide a welded pipe joint unit that is simple in structure, low in production cost, and highly applicable.

[0004] The purpose of this utility model is achieved as follows:

[0005] A welded pipe fitting unit includes: a first fitting having a first welding end and a first connecting end for connecting to a first mounting component; a second fitting having a second welding end for adapting to the first welding end and a second connecting end for connecting to a second mounting component, the second connecting end having an anti-rotation groove; and a positioning clip for detachably being disposed between the second fitting and the second mounting component; wherein the first welding end and the second welding end can be welded at different circumferential positions to change the circumferential mounting angle between the first fitting and the second fitting.

[0006] The present invention further includes a welding insertion part and a welding limiting part in one of the first welding end and the second welding end. The welding insertion part can be inserted into the other welding end and is limited by the welding limiting part. When the welding insertion part is installed, the circumferential position of the first welding end and the second welding end can be adjusted along the circumferential direction.

[0007] The present invention is further provided that the first connector is a bent pipe connector and the second connector is a straight pipe connector.

[0008] The present invention further includes a second sealing ring and a retaining ring sleeve inside the second connecting end of the second connector; the inner wall of the second connector is provided with a sealing ring abutment surface, and the retaining ring sleeve abuts the second sealing ring against the sealing ring abutment surface.

[0009] The present invention further includes a retaining ring having several deformation notches at the end away from the second sealing ring, and the inner wall of the end having a sloping surface to correspond to the sloping protrusion of the second mounting component.

[0010] The present invention further includes a first clip groove that communicates with the interior on the second connecting end of the second connector. The first clip groove is provided with a positioning clip, which has a disassembly part and two insertion parts that are integrally formed on the left and right sides of the disassembly part. The insertion parts can enter the interior through the first clip groove and are used to engage with the second clip groove of the second mounting part.

[0011] The present invention further includes an anti-detachment part formed by bending the outer end of the insertion part, and a corresponding anti-detachment groove is provided on the side wall of the second connecting end.

[0012] The present invention is further provided with a plurality of groove wall protrusions on the left and right side walls of the first clip groove.

[0013] The present invention further comprises that the outer wall of the first connecting end of the first connector is provided with a guide portion, a sealing ring mounting groove and a limiting ring portion in sequence, and a first sealing ring is provided in the sealing ring mounting groove.

[0014] The present invention is further provided with a barb portion between the sealing ring mounting groove and the limiting ring portion.

[0015] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0016] The second connector of this invention is equipped with an anti-rotation groove. After the first connector is installed onto the second connector, its circumferential installation angle can be flexibly adjusted according to the position of the anti-rotation groove. After welding and fixing, it forms a female connector with a specific angle, thereby reducing the difficulty of pipeline layout in complex environments. This method does not require additional mold opening and can manufacture products with various circumferential installation angles under existing production conditions. Compared with re-molding, it significantly reduces development costs and shortens the project cycle, making it suitable for small-batch market demand or early-stage pilot projects, helping companies to quickly respond to the market and seize opportunities. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the pipe connector unit of this utility model.

[0018] Figure 2 This is the second structural schematic diagram of the pipe connector unit of this utility model.

[0019] Figure 3 This is an exploded view of the pipe connector unit of this utility model.

[0020] Figure 4This is a schematic diagram of the installation structure of the pipe connector unit of this utility model.

[0021] The meaning of the labels in the diagram:

[0022] First connector 1; Second connector 2; Positioning clip 3; Second sealing ring 4; Snap ring sleeve 5;

[0023] First welding end 11; welding insertion part 111; welding limiting part 112; first connecting end 12; guide part 121; sealing ring mounting groove 122; limiting ring part 123; first sealing ring 124; barb part 125;

[0024] Second welding end 21; Second connecting end 22; Anti-rotation groove 221; Groove wall protrusion 222; Anti-disengagement groove 223; Limiting boss 224; Sealing ring abutment surface 23; First clamping groove 24;

[0025] Disassembly part 31; Plug-in part 32; Anti-detachment part 33;

[0026] Deformation notch 51; Sloping surface 52;

[0027] First mounting component 100; fixing sleeve 101;

[0028] Second mounting component 200; ramp protrusion 201; second clamping groove 202; anti-rotation key 203. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments:

[0030] Example 1:

[0031] like Figure 1 , 2 As shown in Figure 3, a welded pipe fitting unit is used to connect a first mounting component 100 and a second mounting component 200. It includes a first connector 1, a second connector 2, a positioning clip 3, a first sealing ring 124, a second sealing ring 4, and a retaining ring sleeve 5.

[0032] Specifically, the first connector 1 has a first welding end 11 for connecting to the second connector 2 and a first connecting end 12 for connecting to the first mounting member 100. The second connector 2 has a second welding end 21 for adapting to the first welding end 11 and a second connecting end 22 for connecting to the second mounting member 200. The second connecting end 22 is provided with an anti-rotation groove 221 that is adapted to the anti-rotation key 203 of the second mounting member 200. The first welding end 11 and the second welding end 12 can be welded at different circumferential positions to change the circumferential mounting angle between the first connector 1 and the second connector 2.

[0033] In this embodiment, the first welding end 11 is provided with a welding insertion part 111 and a welding limiting part 112. The welding insertion part 111 is annular, and its outer diameter is basically the same as the main body size of the first connector 1. The welding limiting part 112 is an annular protrusion. The welding insertion part 111 can be inserted into the second welding end 21 and is limited by the welding limiting part 112. The inner wall of the second welding end 21 is against the outer wall of the welding insertion part 111, and the end wall of the second welding end 21 is against the welding limiting part 112. The thickness of the welding limiting part 112 is the same as the wall thickness of the second welding end 21. After connection, the outer wall dimensions of the welding limiting part 112 and the second welding end 21 are basically the same. When the welding insertion part 111 is installed, the circumferential position of the first welding end 11 and the second welding end 21 can be adjusted along the circumferential direction of the second welding end 21.

[0034] In this embodiment, during production, after the first connector is installed onto the second connector, its circumferential installation angle can be flexibly adjusted according to the position of the anti-rotation groove. Finally, the first welding end 11 and the second welding end 21 are connected and fixed by ultrasonic welding, thereby forming a pipe connector unit with a specific angle. The size of this pipe connector unit is basically the same as the original standard female connector. This method does not require additional mold opening and can manufacture products with various circumferential installation angles under existing production conditions to suit different application scenarios. Compared with re-molding, it significantly reduces development costs and shortens the project cycle, making it suitable for small-batch market demand or early-stage pilot projects.

[0035] like Figure 4 As shown, in this embodiment, the first connector 1 is a bent pipe connector, the second connector 2 is a straight pipe connector, the first mounting component 100 is a pipeline, and the second mounting component 200 is an automotive component with a male connector (e.g., an exhaust chamber).

[0036] In this embodiment, the male connector of the second mounting component 200 and the second connector 2 are connected and fixed by a quick-connect structure. There are many quick-connect structures on the market; the quick-connect structure in this embodiment is as follows:

[0037] like Figure 4 As shown, the male connector is provided with a sloping protrusion 201, an annular second clamping groove 202, and an anti-rotation key 203 in sequence from the outside to the inside. The outer diameter of the male connector is adapted to the inner diameter of the second welding end 21, and the outer diameter of the sloping protrusion 201 is adapted to the inner diameter of the second connecting end 22. The inner diameter of the second welding end 21 is smaller than the inner diameter of the second connecting end 22, forming a stepped surface between the two.

[0038] like Figure 3 , 4As shown, the inner wall of the second connector 2 is provided with a sealing ring abutment surface 23 (i.e., a stepped surface) and a second sealing ring 4 and a retaining ring sleeve 5 are installed. The retaining ring sleeve 5 has a ring structure. One end of the retaining ring 4 abuts against the sealing ring abutment surface 23, and the other end is provided with a number of pairs of deformation notches 51. In this embodiment, a pair of symmetrically arranged deformation notches 51 are provided to facilitate the retaining ring sleeve 5 to be installed into the second connector 2 after deformation. At the same time, a slope surface 52 is provided at the inner wall end away from the second sealing ring 4. The slope surface 52 is used to correspond to the slope protrusion 201 of the second mounting part 200. When the male connector is inserted into the second connecting end 22 of the second connector 2, the inner diameter of the male connector is the same as the inner diameter of the first connector 1. The outer end face of the male connector can be limited by the end face of the welding insertion part 111. The slope protrusion 201 abuts against the slope surface 52 of the retaining ring sleeve 5, pushing the retaining ring sleeve 5 closer to the second sealing ring 4, and together with the sealing ring abutment surface 23, squeezing the second sealing ring 4, causing the second sealing ring 4 to undergo radial deformation, thereby sealing the gap between the outer wall of the male connector and the inner wall of the second connector 2.

[0039] The second connecting end 22 of the second connector 2 has a first clamping groove 24 that communicates with the interior. The first clamping groove 24 is provided with a positioning clamp 3. The positioning clamp 3 is detachably disposed between the second connector 2 and the second mounting part 200 and is used to fix the axial position of the two.

[0040] Specifically, such as Figure 3 As shown, the positioning clip 3 is U-shaped and has a disassembly part 31, two insertion parts 32 integrally formed on the left and right sides of the disassembly part 31, and an anti-detachment part 33 bent at the outer end of the insertion part 32. When the positioning clip 3 is installed, the disassembly part 31 can form a gap with the outer surface of the second connector 2, which is convenient for the user to disassemble directly or quickly disassemble using a specific tool. The two insertion parts 32 enter the interior through the first clip groove 24 and engage with the second clip groove 202 of the second mounting member 200, thereby fixing the second connector 2 to the second mounting member 200.

[0041] To prevent the positioning clip 3 from automatically detaching, the outer end of the insertion part 32 is bent to form an anti-detachment part 33. Simultaneously, two corresponding anti-detachment grooves 223 are provided on the side wall of the second connecting end 22. Each anti-detachment groove 223 is surrounded by a limiting boss 224. The front side of the front portion of the limiting boss 224 is provided with a guide slope for guiding the anti-detachment part 33 into the anti-detachment groove 223, allowing the corresponding anti-detachment part 33 to smoothly enter and be contained within the corresponding anti-detachment groove 223. Furthermore, the rear side of the front portion of the limiting boss 224 (i.e., the front side wall of the anti-detachment groove 223) is provided with an arc-shaped guide surface for guiding the anti-detachment part 33 out of the anti-detachment groove 223; the rear portion of the limiting boss 224 has a limiting surface (i.e., the rear side wall of the anti-detachment groove 223) to prevent the positioning clip 3 from being over-installed.

[0042] Preferably, a plurality of groove wall protrusions 222 are provided on the left and right side walls of the first clamping groove 24 to limit the installation angle and axial position of the positioning clamp 3.

[0043] Furthermore, there are many types of connection structures for the first connecting end 12 of the first connector 1, which are set according to the type of the corresponding female connector. For example... Figure 3 As shown, in this embodiment, the outer wall of the first connecting end 12 is sequentially provided with a guide portion 121, a sealing ring mounting groove 122, and a limiting ring portion 123. A first sealing ring 124 is provided in the sealing ring mounting groove 122. The first mounting component 100 (pipeline) is directly mounted on the first connecting end 12 and fixedly connected by a fixing sleeve 101. To increase the stability of the connection structure, a barb portion 125 is also provided on the first connecting end 12 between the sealing ring mounting groove 122 and the limiting ring portion 123. When the fixing sleeve 101 is fixed, the barb portion 125 can be partially embedded into the inner wall of the first mounting component 100 (pipeline).

[0044] Preferably, a third sealing ring can be provided between the outer wall of the welding insertion part 111 and the inner wall of the second welding end 21 to further improve the sealing performance.

[0045] Example 2:

[0046] This embodiment is basically the same as Embodiment 1, except that the second welding end 21 is provided with a welding insertion part 111 and a welding limiting part 112. The welding insertion part 111 is annular, and the welding limiting part 112 is an annular protrusion. The welding insertion part 111 can be inserted into the first welding end 11 and is limited by the welding limiting part 112.

[0047] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A welded pipe fitting unit, characterized in that, include: The first connector (1) has a first welding end (11) and a first connecting end (12) for connecting the first mounting member (100); The second connector (2) has a second welding end (21) for adapting to the first welding end (11) and a second connecting end (22) for connecting to the second mounting member (200), wherein the second connecting end (22) is provided with an anti-rotation groove (221); and A positioning clip (3) is provided for detachably being disposed between the second connector (2) and the second mounting member (200); The first welding end (11) and the second welding end (21) can be welded at different circumferential positions to change the circumferential installation angle between the first joint (1) and the second joint (2).

2. The welded pipe joint unit according to claim 1, characterized in that: In the first welding end (11) and the second welding end (21), one of the welding ends is provided with a welding insertion part (111) and a welding limiting part (112). The welding insertion part (111) can be inserted into the other welding end and is limited by the welding limiting part (112). During installation, the welding insertion part (111) can adjust the circumferential position of the first welding end (11) and the second welding end (21) along the circumferential direction.

3. The welded pipe joint unit according to claim 2, characterized in that: The first connector (1) is a bend connector, and the second connector (2) is a straight connector.

4. A welded pipe joint unit according to any one of claims 1-3, characterized in that: The second connector (2) is provided with a second sealing ring (4) and a retaining ring sleeve (5) in the second connecting end (22); The inner wall of the second connector (2) is provided with a sealing ring abutment surface (23), and the retaining ring sleeve (5) abuts the second sealing ring (4) against the sealing ring abutment surface (23).

5. A welded pipe joint unit according to claim 4, characterized in that: The retaining ring sleeve (5) has several deformation notches (51) at the end away from the second sealing ring (4), and the inner wall of the end is provided with a slope surface (52) to correspond to the slope protrusion (201) of the second mounting member (200).

6. A welded pipe joint unit according to any one of claims 1-3, characterized in that: The second connector (2) has a first clip groove (24) that communicates with the interior on its second connecting end (22). The first clip groove (24) is provided with the positioning clip (3). The positioning clip (3) has a disassembly part (31) and two insertion parts (32) that are integrally formed on the left and right sides of the disassembly part (31). The insertion part (32) can enter the interior through the first clip groove (24) and is used to engage with the second clip groove (202) of the second mounting part (200).

7. A welded pipe joint unit according to claim 6, characterized in that: The outer end of the plug (32) is bent to form an anti-detachment part (33), and a corresponding anti-detachment groove (223) is provided on the side wall of the second connection end (22).

8. A welded pipe joint unit according to claim 6, characterized in that: The first clip groove (24) has several groove wall protrusions (222) on its left and right side walls.

9. A welded pipe joint unit according to any one of claims 1-3, characterized in that: The outer side wall of the first connecting end (12) of the first connector (1) is provided with a guide part (121), a sealing ring mounting groove (122) and a limiting ring part (123) in sequence, and a first sealing ring (124) is provided in the sealing ring mounting groove (122).

10. A welded pipe joint unit according to claim 9, characterized in that: A barb (125) is provided between the sealing ring mounting groove (122) and the limiting ring (123).

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