Axial tensile connection joint for stainless steel pipes

Abstract

The utility model belongs to pipeline connection technical field, concretely is a kind of stainless steel pipe axial tensile connecting joint, including the connecting joint body being made of embedding part, clamping part, fixed part, the accommodating cavity for accommodating stainless steel pipe end part is formed between embedding part and clamping part, sealing ring is equipped in accommodating cavity, clamping part end is equipped with clamping piece by being provided with slot, clamping piece end is equipped with clamping block, clamping groove is provided in stainless steel pipe connecting end, there is the clamping groove matched with clamping block in clamping groove, the chamber for the bending of clamping piece is formed in fixed part, the taper welding surface of both ends of fixed part, the obtuse angle soldering material part is formed between taper welding surface and stainless steel pipe outer wall, taper welding surface is close to the end of stainless steel pipe and is provided with chamfer, chamfer and taper welding surface form V-shaped structure, embedding part, clamping part, fixed part are integrally formed, the connecting joint of the utility model realizes double axial tensile by clamping location and welding reinforcement, and the anti-displacement stability after the connection of stainless steel pipe is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline connection technology, specifically a stainless steel pipe axial tensile connection joint. Background Technology

[0002] Stainless steel pipe is a tubular steel material with a closed loop cross-section. Many stainless steel pipes are used to transport fluids such as oil, natural gas, water, and steam. They are also widely used in the manufacture of mechanical parts and engineering structures. When building pipelines or assembling mechanical structures, multiple stainless steel pipes need to be connected, so suitable connectors are essential components.

[0003] Current stainless steel pipe fittings have the following drawbacks: insufficient axial tensile strength, making them difficult to resist displacement caused by external drag. Most existing pipe fittings rely solely on single clamping or welding methods for fixation. For example, some fittings are only connected by a clamping structure without additional reinforcement at the clamping point. During daily installation or use, the pipes may be accidentally pulled, subjected to fluid impact, or pulled by their own weight, causing the clamping point to loosen easily, resulting in relative axial movement between the two pipes. Other fittings rely solely on welding for fixation, resulting in concentrated stress at the weld. Once subjected to a large axial tensile force, the weld is prone to cracking, which can also loosen the pipe connection and prevent stable positioning. Therefore, to address the above problems, a stainless steel pipe axial tensile strength connection joint is proposed. Utility Model Content

[0004] To overcome the shortcomings of existing stainless steel pipe connectors, an axial tensile connection joint for stainless steel pipes is proposed.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The stainless steel pipe axial tensile connection joint of this utility model includes a connection joint body composed of an embedding part, a snap-fit ​​part, and a fixing part. When the embedding part is connected to the stainless steel pipe, it is embedded into its channel and fits against the inner wall. The connecting end of the stainless steel pipe is provided with a snap-fit ​​groove that cooperates with the snap-fit ​​part to limit the axial positioning of the connection joint body and the stainless steel pipe. When the fixing part is connected to the stainless steel pipe, its end abuts against the outer periphery of the stainless steel pipe and is fixed by welding.

[0006] Preferably, the end of the snap-fit ​​portion is provided with a snap-fit ​​element through a slot, the end of the snap-fit ​​element is provided with a snap-fit ​​block, the snap-fit ​​slot includes a snap-fit ​​groove that forms a snap-fit ​​engagement with the snap-fit ​​block, and the end of the snap-fit ​​block is provided with a slope.

[0007] Preferably, the snap-fit ​​component and the snap-fit ​​part are an integral structure, and the inner wall and outer wall of the snap-fit ​​component away from the snap-fit ​​block are provided with arc grooves for bending of the snap-fit ​​component.

[0008] Preferably, the fixing part has a cavity formed therein to provide bending space for the snap-fit ​​member.

[0009] Preferably, a receiving cavity for accommodating the end of the stainless steel tube is formed between the embedding part and the snap-fit ​​part, and a sealing ring is provided in the receiving cavity.

[0010] Preferably, both ends of the inner wall of the embedded part are provided with bevels, and the end of the bevel closest to the inner wall of the stainless steel tube has the largest diameter.

[0011] Preferably, the two ends of the fixing part are tapered welding surfaces, and the tapered welding surfaces form an obtuse angle welding part with the outer wall of the stainless steel pipe.

[0012] Preferably, the tapered welding surface has a chamfer at one end near the stainless steel tube, and the chamfer and the tapered welding surface form a V-shaped structure.

[0013] Preferably, the embedding part, the snap-fit ​​part, and the fixing part are integrally formed.

[0014] The beneficial effects of this utility model are: This utility model provides a stainless steel pipe axial tensile connection joint. Through the design of the embedded part, snap-fit ​​part and fixing part of the connection joint body, the snap-fit ​​limiting and welding structure reinforces the double axial tensile structure, which improves the axial limiting ability and displacement resistance stability after the two stainless steel pipes are connected. The snap-fit ​​part has a snap-fit ​​piece with a slotted snap-fit ​​piece at its end, which can engage with the snap-fit ​​groove in the end of the stainless steel pipe. It can directly block the relative movement of the stainless steel pipe along the axial direction under external force, forming an axial anti-dislodgement guarantee. The end of the fixing part abuts against the outer circumference of the stainless steel pipe and is welded and fixed, forming a rigid whole between the connection joint body and the two stainless steel pipes. It can distribute the axial tensile force to the entire connection structure, avoid overload of the snap-fit ​​part, and further enhance the axial tensile effect. The double structure can effectively resist the axial displacement caused by external force and ensure the connection stability. Meanwhile, the embedded part fits tightly against the inner wall of the stainless steel pipe, which can reduce the interference of radial sway of the pipe on the axial limiting structure and provide support for the stable engagement of the snap-fit ​​block and the slot. The sealing ring in the cavity between the embedded part and the snap-fit ​​part can achieve sealing of the connection part while ensuring axial tensile performance, avoiding fluid leakage, and taking into account both structural stability and practical sealing performance. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a cross-sectional view of the structure of this utility model and the stainless steel pipe before assembly; Figure 2 This is a cross-sectional view of the structure of this utility model after assembly with a stainless steel pipe; Figure 3This is a three-dimensional view of the connector body of this utility model, with the fixing part removed. Legend: 100. Stainless steel pipe; 1. Connecting joint body; 101. Embedded part; 102. Snap-fit ​​part; 1021. Groove; 1022. Snap-fit ​​piece; 10221. Snap-fit ​​block; 10222. Sloping edge; 10223. Arc groove; 103. Fixing part; 2. Snap-fit ​​groove; 201. Snap-fit ​​groove; 3. Receiving cavity; 4. Sealing ring; 5. Bevel; 6. Conical welding surface; 7. Obtuse angle solder part; 8. Chamfer; 9. Chamber; 10. Solder. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] Specific implementation examples are given below.

[0018] Please see Figures 1-3 The present invention discloses an axial tensile connection joint for stainless steel pipes, comprising a connection joint body 1 consisting of an embedding part 101, a snap-fit ​​part 102, and a fixing part 103. When the embedding part 101 is connected to the stainless steel pipe 100, it is embedded into its channel and fits against the inner wall. The connecting end of the stainless steel pipe 100 is provided with a snap-fit ​​groove 2 that cooperates with the snap-fit ​​part 102 to axially limit the connection joint body 1 and the stainless steel pipe 100. A receiving cavity 3 for accommodating the end of the stainless steel pipe 100 is formed between the embedding part 101 and the snap-fit ​​part 102. A sealing ring 4 is provided in the receiving cavity 3. When the fixing part 103 is connected to the stainless steel pipe 100, its end abuts against the outer periphery of the stainless steel pipe 100 and is fixed by welding. The end of the snap-fit ​​part 102 is provided with a snap-fit ​​member 1022 through a slot 1021. The end of the snap-fit ​​member 1022 is provided with a snap-fit ​​block 10221. The snap-fit ​​groove 2 includes a snap-fit ​​groove 201 that forms a snap-fit ​​engagement with the snap-fit ​​block 10221, and the end of the snap-fit ​​block 10221 is provided with a ramp 10222. During operation, when connecting two stainless steel pipes 100, the embedding part 101 of the connecting connector body 1 is first aligned with the channel of one stainless steel pipe 100, so that the end of the connecting end of the stainless steel pipe 100 is inserted into the receiving cavity 3. During this process, the stainless steel pipe 100 also moves towards the snap-fit ​​part 102. The snap-fit ​​member 1022 on the snap-fit ​​part 102 contacts the end of the stainless steel pipe 100. The snap-fit ​​block 10221 at the end of the snap-fit ​​member 1022 will slide along the inner wall of the snap-fit ​​groove 2 at the end of the stainless steel pipe 100 under the guidance of the ramp 10222 until the snap-fit ​​block 10221 is snapped into the snap-fit ​​groove 201 of the snap-fit ​​groove 2. Axial limiting is achieved through snap-fit ​​engagement. After snap-fit ​​engagement, the sealing ring 4 in the receiving cavity 3 is squeezed by the end of the stainless steel pipe 100 and the inner wall of the receiving cavity 3. After elastic deformation, it fills the gap and forms a seal. At the same time as assembly, the fixing part 103 will be simultaneously sleeved on the outer wall of the stainless steel pipe 100, and then the same process is repeated. The method involves connecting another section of stainless steel pipe 100 to the other end of the connecting joint body 1. Finally, the contact point between the end of the fixing part 103 and the outer periphery of the stainless steel pipe 100 is welded to form a rigid connection, completing the overall assembly. Through the engagement and limiting of the snap-fit ​​block 10221 and the slot 201, and the reinforcement of the welding between the fixing part 103 and the stainless steel pipe 100, an axial anti-displacement structure is formed, improving the axial limiting ability of the two stainless steel pipes 100 after being connected by the connecting joint body 1. When external force causes the two stainless steel pipes 100 to be dragged by axial tension, the tight engagement of the snap-fit ​​block 10221 and the slot 201 will directly block the movement. The two stainless steel pipes 100 move relative to each other along the axial direction to avoid snap-fit ​​failure. The welding of the fixing part 103 further forms a rigid whole between the connecting joint body 1 and the two stainless steel pipes 100, distributing the axial tensile force to the entire connection structure and preventing overload of a single snap-fit ​​part. With double protection, it can effectively resist axial displacement caused by external drag and ensure the stability of the structure after connection. At the same time, the tight fit between the embedded part 101 and the inner wall of the stainless steel pipe 100 can reduce the interference of the radial sway of the stainless steel pipe 100 on the axial limiting structure, and provide support for the stable engagement of the snap-fit ​​block 10221 and the slot 201 to enhance the axial anti-movement effect.

[0019] Furthermore, the snap-fit ​​component 1022 and the snap-fit ​​part 102 are integrally formed. Both the inner and outer walls of the snap-fit ​​component 1022, away from the snap-fit ​​block 10221, are provided with arc grooves 10223 for bending the snap-fit ​​component 1022. During operation, the snap-fit ​​component 1022 and the snap-fit ​​part 102 are integrally formed using processes such as forging or casting, without any seams. When the end of the stainless steel pipe 100 pushes the snap-fit ​​block 10221, causing the snap-fit ​​component 1022 to bend outwards, the snap-fit ​​component 1022 moves away from the snap-fit ​​block 10221. The arc grooves 10223 on the inner and outer walls of the retaining block 10221 guide the deformation direction through the arc structure, avoiding local stress concentration during bending and controlling the deformation amplitude. This ensures that the retaining block 10221 can slide smoothly into the retaining groove 201, while preventing the retaining part 1022 from bending and breaking due to excessive bending. After the retaining block 10221 is inserted into the retaining groove 201, the deformation at the arc groove 10223 will generate a rebound force, making the retaining block 10221 fit tightly against the inner wall of the retaining groove 201, thus enhancing the retaining and limiting effect.

[0020] Furthermore, a chamber 9 is formed within the fixing part 103 to provide bending space for the snap-fit ​​member 1022. During operation, when the snap-fit ​​member 1022 bends due to the engagement of the snap-fit ​​block 10221 with the slot 201, the chamber 9 inside the fixing part 103 provides bending space for the snap-fit ​​member 1022, ensuring that the snap-fit ​​member 1022 can deform. The chamber 9 is hidden within the fixing part 103, without increasing the overall volume of the connector body 1, making the structure more compact and suitable for narrow installation spaces.

[0021] Furthermore, both ends of the inner wall of the embedded part 101 are provided with bevels 5, and the end of the bevel 5 closest to the inner wall of the stainless steel pipe 100 has the largest diameter. During operation, when fluid is transported in the stainless steel pipe 100, the fluid enters the channel of the embedded part 101 from the stainless steel pipe 100. Since the end of the bevel 5 closest to the inner wall of the stainless steel pipe 100 has the largest diameter, a smooth transition is formed from the inner wall of the stainless steel pipe 100 to the inner wall of the embedded part 101. When the fluid flows through the bevel 5, there is no obstruction caused by the sudden change in the channel diameter, which at the same time reduces the generation of eddies and turbulence and reduces the energy loss of the transport.

[0022] Furthermore, both ends of the fixing part 103 are tapered welding surfaces 6. The tapered welding surfaces 6 and the outer wall of the stainless steel tube 100 form an obtuse angle weld portion 7. A chamfer 8 is provided at one end of the tapered welding surface 6 near the stainless steel tube 100, and the chamfer 8 and the tapered welding surface 6 form a V-shaped structure. During operation, when welding the fixing part 103 to the stainless steel tube 100, the solder 10 fills into the obtuse angle weld portion 7 formed by the tapered welding surface 6 and the outer wall of the stainless steel tube 100. The obtuse angle structure makes the solder 10 and the fixing part 10... The contact area between the end of the weld and the outer wall of the stainless steel pipe 100 is increased. At the same time, the V-shaped structure formed by the chamfer 8 and the tapered welding surface 6 expands the space for the weld filler and increases the welding stress area. It also guides the weld filler to be evenly distributed, making the adhesion of the weld filler 10 stronger. This ensures that the weld filler 10 is in full contact with the fixing part 103 and the outer wall of the stainless steel pipe 100, forming a strong welded joint and improving the load-bearing capacity. Through the combination of the above structures, the large stress area of ​​the weld filler 10 disperses the axial tensile force, prevents cracking of the welded part, and enhances the overall tensile strength.

[0023] Furthermore, the embedding part 101, the snap-fit ​​part 102, and the fixing part 103 are integrally formed. During operation, the embedding part 101, the snap-fit ​​part 102, and the fixing part 103 are integrally formed by processes such as integral forging, casting, or extrusion molding. The connecting joint body 1 has no splicing interface. The integral structure makes the material distribution of the connecting joint body 1 uniform. When subjected to axial tensile force, the tensile force is uniformly transmitted through the overall structure. There is no stress concentration at the splicing point, which improves the overall strength and rigidity of the connecting joint body 1, extends its service life, and improves its axial tensile stability.

[0024] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A stainless steel pipe axial tensile connection joint, characterized in that: The connector body (1) includes an insert (101), a snap-fit ​​part (102), and a fixing part (103). When the insert (101) is connected to the stainless steel pipe (100), it is inserted into its channel and fits against the inner wall. The connecting end of the stainless steel pipe (100) is provided with a snap-fit ​​groove (2) that cooperates with the snap-fit ​​part (102) to axially limit the connector body (1) and the stainless steel pipe (100). When the fixing part (103) is connected to the stainless steel pipe (100), its end abuts against the outer periphery of the stainless steel pipe (100) and is fixed by welding.

2. The axial tensile connection joint for stainless steel pipes according to claim 1, characterized in that: The end of the snap-fit ​​part (102) is provided with a snap-fit ​​member (1022) through a slot (1021), and the end of the snap-fit ​​member (1022) is provided with a snap-fit ​​block (10221). The snap-fit ​​groove (2) includes a snap-fit ​​groove (201) that forms a snap-fit ​​engagement with the snap-fit ​​block (10221), and the end of the snap-fit ​​block (10221) is provided with a ramp (10222).

3. The axial tensile connection joint for stainless steel pipes according to claim 2, characterized in that: The snap-fit ​​component (1022) and the snap-fit ​​part (102) are an integral structure. The inner wall and outer wall of the snap-fit ​​component (1022) away from the snap-fit ​​block (10221) are provided with arc grooves (10223) for bending of the snap-fit ​​component (1022).

4. The axial tensile connection joint for stainless steel pipes according to claim 3, characterized in that: The fixing part (103) has a chamber (9) that provides bending space for the snap-fit ​​member (1022).

5. The axial tensile connection joint for stainless steel pipes according to claim 1, characterized in that: A receiving cavity (3) for accommodating the end of the stainless steel tube (100) is formed between the embedding part (101) and the snap-fit ​​part (102), and a sealing ring (4) is provided in the receiving cavity (3).

6. The axial tensile connection joint for stainless steel pipes according to claim 1, characterized in that: Both ends of the inner wall of the embedded part (101) are provided with bevels (5), and the bevel (5) has the largest diameter at the end closest to the inner wall of the stainless steel tube (100).

7. The axial tensile connection joint for stainless steel pipes according to claim 1, characterized in that: The two ends of the fixing part (103) are tapered welding surfaces (6), and the tapered welding surfaces (6) and the outer wall of the stainless steel tube (100) form an obtuse angle welding part (7).

8. The axial tensile connection joint for stainless steel pipes according to claim 7, characterized in that: The tapered welding surface (6) has a chamfer (8) at one end near the stainless steel tube (100), and the chamfer (8) and the tapered welding surface (6) form a V-shaped structure.

9. The axial tensile connection joint for stainless steel pipes according to claim 1, characterized in that: The embedding part (101), the snap-fit ​​part (102), and the fixing part (103) are integrally formed.

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