Stainless steel composite pipe connection fastener assembly

Abstract

This utility model discloses a stainless steel composite pipe connection and fastening assembly, including a connecting pipe with stainless steel composite pipes connected to both ends. Sealing rings are connected to both ends of the connecting pipe, and fastening threaded sleeves are fitted onto the outside of both sealing rings. The two fastening threaded sleeves are respectively fitted onto the outside of the front and rear ends of the connecting pipe and onto the outside of the stainless steel composite pipes. The inner cylindrical walls of the two fastening threaded sleeves have threads on the side closest to the connecting pipe. When the sealing gasket is compressed, hydraulic oil pushes a linkage push rod to extend outwards, and the linkage push rod compresses the linkage pressure ring and elastic oil bladder inside the fastening threaded sleeve. After the elastic oil bladder is compressed, hydraulic oil enters the expansion oil bladder through a connecting pipe. The expansion oil bladder pushes the telescopic claws to tightly adhere to the outer wall of the composite pipe, forming a double fastening mechanism. This enhances the anti-loosening ability of the threaded connection and automatically increases the clamping force of the claws as the fastening force increases, ensuring a stable connection.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection, and in particular to a stainless steel composite pipe connection and fastening assembly. Background Technology

[0002] In traditional pipe connection technologies, stainless steel composite pipes are usually connected by welding, flange connection or threaded fastening. These methods have problems such as difficulty in later maintenance, sealing performance being affected by gasket aging, easy loosening, and insufficient sealing reliability.

[0003] To address the aforementioned issues, this patent proposes a connection technology that can dynamically adapt to pipe end fit, possesses self-reinforcing sealing and dual fastening functions, thereby improving the reliability, durability, and environmental adaptability of stainless steel composite pipe connections and meeting the combined requirements of modern industrial pipeline systems for efficient sealing and convenient maintenance. Utility Model Content

[0004] The main purpose of this utility model is to propose a stainless steel composite pipe connection and fastening assembly, which aims to solve the problems of difficult maintenance, poor sealing performance due to gasket aging, and easy loosening caused by the traditional connection of stainless steel composite pipes using welding, flange connection or thread fastening.

[0005] To address the aforementioned problems, this utility model proposes a stainless steel composite pipe connection and fastening assembly, comprising a connecting pipe, with stainless steel composite pipes connected to both ends of the connecting pipe, and sealing rings connected to both ends of the connecting pipe. Two threaded fastening sleeves are fitted onto the outside of each sealing ring, respectively fitted onto the outside of the front and rear ends of the connecting pipe and onto the outside of the stainless steel composite pipes. The inner cylindrical walls of the two threaded fastening sleeves have threads on the side near the connecting pipe, and are connected to the stainless steel composite pipes via these threads. A sealing gasket is provided inside the end of each sealing ring away from the connecting pipe, and the two sealing gaskets are respectively positioned between the connecting pipe and the two stainless steel composite pipes, with hydraulic oil contained inside each sealing gasket.

[0006] Preferably, the sealing ring has a sealing groove at the end away from the connecting pipe, and the sealing gasket is engaged inside the sealing groove and protrudes from the outside of the sealing groove on the side away from the connecting pipe. The sealing groove is connected to multiple expansion holes at the end near the connecting pipe, and the multiple expansion holes are all opened on the outer wall of the sealing ring at the end near the connecting pipe.

[0007] Preferably, a support ring is provided inside the end of the sealing gasket away from the connecting pipe, and multiple connecting holes are provided inside the end of the sealing gasket near the connecting pipe. Each of the multiple connecting holes is provided with a linkage push rod, and the other end of the multiple linkage push rods is respectively inserted into multiple telescopic holes.

[0008] Preferably, the inner wall of the fastening threaded sleeve near the connecting pipe end is provided with an oil trough, the oil trough is connected to a plurality of connecting grooves, and the plurality of connecting grooves are all opened inside the fastening threaded sleeve, and the other end of the plurality of connecting grooves is connected to an expansion hole.

[0009] Preferably, the expansion hole is opened on the inner wall of the fastening threaded sleeve cylinder away from the connecting pipe, and is located on the thread on the inner wall of the fastening threaded sleeve away from the connecting pipe. The oil sump is internally slidably connected to a linkage pressure ring at the end away from the connecting pipe, and the linkage pressure ring protrudes outside the oil sump.

[0010] Preferably, an elastic oil naan is provided inside the oil naan trough on the side near the connecting pipe, and the elastic oil naan is located at the end of the linkage pressure ring near the connecting pipe. The elastic oil naan is connected to multiple connecting pipes, and the multiple connecting pipes are respectively located inside multiple connecting troughs.

[0011] Preferably, the other end of the connecting pipe is connected to an expanding oil naan, and the expanding oil naan is located inside the expansion hole. Hydraulic oil is provided inside the elastic oil naan, the connecting pipe and the expanding oil naan. A telescopic claw is provided at one end of the expanding oil naan near the central axis of the fastening threaded sleeve, and the telescopic claw is slidably connected inside the expansion hole and attached to the outer wall of the stainless steel composite pipe.

[0012] Beneficial effects:

[0013] 1. The sealing gasket of this utility model is filled with hydraulic oil, which can automatically expand when the connecting pipe is squeezed with the stainless steel composite pipe to achieve self-adaptive sealing, effectively improve the sealing performance of the connection, prevent liquid or gas leakage, and adapt to the small tolerances of different pipe diameters to ensure tight fit.

[0014] 2. The sealing gasket of this utility model is equipped with a support ring inside, which keeps the end face of the sealing gasket flat under the action of hydraulic oil, ensuring uniform contact with the stainless steel composite pipe, avoiding local wear, improving the durability of the sealing gasket, and maintaining a long-term stable sealing effect.

[0015] 3. When the sealing gasket of this utility model is under pressure, the hydraulic oil pushes the linkage push rod to extend outward, and the linkage push rod squeezes the linkage pressure ring and elastic oil bladder inside the fastening threaded sleeve. After the elastic oil bladder is compressed, the hydraulic oil enters the expansion oil bladder through the connecting pipe. The expansion oil bladder pushes the telescopic claw to stick tightly to the outer wall of the composite pipe, forming a double fastening mechanism. This not only enhances the anti-loosening ability of the threaded connection, but also automatically increases the clamping force of the claw as the fastening force increases, ensuring a stable connection.

[0016] 4. The oil bladder groove, connecting groove and expansion hole of the fastening threaded sleeve of this utility model form a hydraulic transmission path, so that the compression force of the sealing gasket and the fastening force of the telescopic claw are related to each other, realizing dynamic balance, ensuring the synergistic effect of sealing and fastening, and improving the reliability and adaptability of the overall connection.

[0017] 5. The sealing ring, sealing gasket, hydraulic oil and fastening threaded sleeve of this utility model together form a multi-level sealing barrier, which effectively prevents media leakage. It is especially suitable for high pressure, high temperature or corrosive environment, and improves the safety and service life of pipeline system.

[0018] 6. This utility model adopts the assembly method of threaded sleeve and sealing ring, which is convenient for installation and disassembly. Maintenance does not require damage to the pipeline structure, reducing maintenance costs, while ensuring that the sealing performance is not affected after reassembly. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the connection and fastening assembly of this utility model;

[0021] Figure 2 This is a three-dimensional cross-sectional structural diagram of the connection and fastening assembly of this utility model;

[0022] Figure 3 This is a schematic diagram of the sealing ring connection structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the fastening threaded sleeve connection structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the elastic oil-fried dough connection structure of this utility model;

[0025] Figure 6 For the present utility model Figure 2 Enlarged diagram of point A in the middle.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1. Connecting pipe; 2. Sealing ring; 3. Fastening threaded sleeve; 4. Sealing gasket; 5. Sealing groove; 6. Telescopic hole; 7. Support ring; 8. Connecting insertion hole; 9. Linkage push rod; 10. Oil naan groove; 11. Connecting groove; 12. Expansion hole; 13. Linkage pressure ring; 14. Elastic oil naan; 15. Connecting pipe; 16. Expanding oil naan; 17. Telescopic claw. Detailed Implementation

[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To achieve the above-mentioned utility model objectives, such as Figures 1-6 As shown, this utility model provides a stainless steel composite pipe connection and fastening assembly, including a connecting pipe 1, with stainless steel composite pipes connected to both ends of the connecting pipe 1. Sealing rings 2 are connected to both ends of the connecting pipe 1, and fastening threaded sleeves 3 are fitted onto the outside of each sealing ring 2. The two fastening threaded sleeves 3 are respectively fitted onto the outside of the front and rear ends of the connecting pipe 1 and onto the outside of the stainless steel composite pipes. The inner cylindrical wall of the two fastening threaded sleeves 3 has threads on the side near the connecting pipe 1, and is connected to the stainless steel composite pipes through these threads. Sealing gaskets 4 are provided inside the two sealing rings 2 at the ends away from the connecting pipe 1. The two sealing gaskets 4 are respectively positioned between the connecting pipe 1 and the two stainless steel composite pipes. Hydraulic oil is installed inside both sealing gaskets 4 between the pipes. During the connection and fastening process between the two stainless steel composite pipes, the connecting pipe 1 is connected between the two stainless steel composite pipes, and the connection between the connecting pipe 1 and the stainless steel composite pipe is made through the sealing rings 2 at both ends. The connection between the connecting pipe 1 and the stainless steel composite pipe is sealed by the sealing gasket 4. Since the sealing gasket 4 is filled with hydraulic oil, the sealing gasket 4 can expand under the extrusion action between the connecting pipe 1 and the stainless steel composite pipe to achieve self-adaptive sealing, thereby improving the connection sealing performance between the connecting pipe 1 and the stainless steel composite pipe, and thus improving the connection sealing performance between the two stainless steel composite pipes.

[0030] Preferably, the sealing ring 2 has a sealing groove 5 at the end away from the connecting pipe 1, and the sealing gasket 4 is snapped into the sealing groove 5 and protrudes from the outside of the sealing groove 5 away from the connecting pipe 1. The sealing groove 5 has multiple expansion holes 6 connected to the end near the connecting pipe 1, and the multiple expansion holes 6 are all opened on the outer wall of the sealing ring 2 near the end near the connecting pipe 1. The sealing gasket 4 has a support ring 7 inside the end away from the connecting pipe 1, and the sealing gasket 4 has multiple connecting holes 8 at the end near the connecting pipe 1. The multiple connecting holes 8 are all provided with linkage push rods 9, and the other ends of the multiple linkage push rods 9 are respectively inserted into the multiple expansion holes 6. During the process of the sealing gasket 4 being squeezed, the sealing gasket 4 is compressed into the sealing groove 5, and the oil pressure of the internal hydraulic oil is increased, causing the sealing gasket 4 to expand, so that the sealing gasket 4 can fit tightly inside the sealing groove 5 and tightly fit on the end face of the stainless steel composite pipe.

[0031] Meanwhile, the support ring 7 inside the sealing gasket 4, supported by hydraulic oil, supports the end of the sealing gasket 4 near the stainless steel composite pipe end face, ensuring that the contact surface between the sealing gasket 4 and the stainless steel composite pipe remains flat. This ensures uniform contact force, reduces wear on the sealing gasket 4, and improves the durability of the sealing gasket 4.

[0032] In addition, the sealing gasket 4 can compress multiple linkage push rods 9 through the support ring 7, causing the multiple linkage push rods 9 to move towards the end of the connecting pipe 1 inside the multiple telescopic holes 6 and protrude from the outside of the sealing ring 2 near one end.

[0033] Preferably, the inner wall of the fastening threaded sleeve 3 near the connecting pipe 1 has an oil trough 10. The oil trough 10 is externally connected to multiple connecting grooves 11, all of which are located inside the fastening threaded sleeve 3. The other end of each connecting groove 11 is connected to an expansion hole 12, which is located on the inner cylindrical wall of the fastening threaded sleeve 3 away from the connecting pipe 1, and on the threaded side of the inner wall of the fastening threaded sleeve 3 away from the connecting pipe 1. The oil trough 10 at the end away from the connecting pipe 1 is internally slidably connected to a linkage. A pressure ring 13, and a linkage pressure ring 13 protruding outside the oil naan trough 10, is provided inside the oil naan trough 10 near the connecting pipe 1. The elastic oil naan 14 is located at the end of the linkage pressure ring 13 near the connecting pipe 1. Multiple connecting pipes 15 are connected to the outside of the elastic oil naan 14, and the multiple connecting pipes 15 are respectively located inside multiple connecting grooves 11. The other end of the connecting pipe 15 is connected to an expanding oil naan 16, and the expanding oil naan 16 is located inside the expansion hole 12. The elastic oil naan 14, the connecting pipes 15 and the expansion hole 12 are connected. Hydraulic oil is installed inside each of the oil naan bread 16. Each expansion oil naan bread 16 has a telescopic claw 17 at the end near the central axis of the fastening threaded sleeve 3. The telescopic claw 17 is slidably connected inside the expansion hole 12 and adheres to the outer wall of the stainless steel composite pipe. During the process of fastening the threaded sleeve 3 to the outside of the stainless steel composite pipe, the inner wall of the end of the threaded sleeve 3 near the connecting pipe 1 adheres to the outer wall of the sealing ring 2 near the connecting pipe 1, thus squeezing the linkage pressure ring 13 and compressing it into the oil naan bread trough. Inside the 10, the elastic oil 14 is squeezed, and at the same time, multiple protruding linkage push rods 9 will squeeze the linkage pressure ring 13 again, and squeeze the elastic oil 14 through the linkage pressure ring 13. The hydraulic oil inside the elastic oil 14 is introduced into the expansion oil 16 through the connecting pipe 15 under the squeezing action, causing the expansion oil 16 to expand. The expansion of the expansion oil 16 pushes the telescopic claw 17 out of the expansion hole 12, so that the expansion hole 12 fits tightly against the outer wall of the stainless steel composite pipe.

[0034] Therefore, the fastening threaded sleeve 3 can both connect and fasten the stainless steel composite pipe through the thread and fasten the stainless steel composite pipe through multiple telescopic claws 17. The fastening strength of the multiple telescopic claws 17 to the stainless steel composite pipe is related to the fastening strength between the connecting pipe 1 and the stainless steel composite pipe, and increases as the fastening strength between the connecting pipe 1 and the stainless steel composite pipe increases.

[0035] Conversely, the elastic oil sac 14 can support and push multiple linkage push rods 9 through the linkage pressure ring 13, allowing the elastic oil sac 14 to react on the multiple linkage push rods 9, causing the multiple linkage push rods 9 to push the support ring 7, thereby improving the sealing performance between the sealing gasket 4 and the end face of the stainless steel composite pipe.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A stainless steel composite pipe connection and fastening assembly, characterized in that, The device includes a connecting pipe (1), which is connected to stainless steel composite pipes at both ends. It is also connected to sealing rings (2) at both ends. Each of the two sealing rings (2) is fitted with a fastening threaded sleeve (3), which is fitted to the front and rear ends of the connecting pipe (1) and the stainless steel composite pipes. The inner cylindrical wall of the two fastening threaded sleeves (3) is threaded on the side of the connecting pipe (1) and connected to the stainless steel composite pipes through the threads. Each of the two sealing rings (2) is fitted with a sealing gasket (4) at the end away from the connecting pipe (1). The two sealing gaskets (4) are respectively positioned between the connecting pipe (1) and the two stainless steel composite pipes, and hydraulic oil is provided inside each sealing gasket (4).

2. The stainless steel composite pipe connection and fastening assembly as described in claim 1, characterized in that, The sealing ring (2) has a sealing groove (5) at the end away from the connecting pipe (1), and the sealing gasket (4) is snapped into the sealing groove (5) and protrudes out of the sealing groove (5) on the side away from the connecting pipe (1). The sealing groove (5) has multiple expansion holes (6) at the end near the connecting pipe (1), and the multiple expansion holes (6) are all opened on the outer wall of the sealing ring (2) near the connecting pipe (1).

3. The stainless steel composite pipe connection and fastening assembly as described in claim 2, characterized in that, The sealing gasket (4) has a support ring (7) inside the end away from the connecting pipe (1). The sealing gasket (4) has multiple connecting holes (8) at the end near the connecting pipe (1). Each of the multiple connecting holes (8) has a linkage push rod (9) inside, and the other end of the multiple linkage push rods (9) is inserted into multiple telescopic holes (6).

4. The stainless steel composite pipe connection and fastening assembly as described in claim 3, characterized in that, The fastening threaded sleeve (3) has an oil trough (10) on the inner wall of one end near the connecting pipe (1). The oil trough (10) is connected to a plurality of connecting grooves (11) on the outside. All the connecting grooves (11) are opened inside the fastening threaded sleeve (3). The other end of the plurality of connecting grooves (11) is connected to an expansion hole (12).

5. The stainless steel composite pipe connection and fastening assembly as described in claim 4, characterized in that, The expansion hole (12) is opened on the inner wall of the fastening threaded sleeve (3) away from the connecting pipe (1), and is located on the thread on the inner wall of the fastening threaded sleeve (3) away from the connecting pipe (1). The oil naan groove (10) is internally slidably connected to a linkage pressure ring (13) at the end away from the connecting pipe (1), and the linkage pressure ring (13) protrudes outside the oil naan groove (10).

6. The stainless steel composite pipe connection and fastening assembly as described in claim 5, characterized in that, The oil naan trough (10) has an elastic oil naan (14) inside on the side near the connecting pipe (1), and the elastic oil naan (14) is located at the end of the linkage pressure ring (13) near the connecting pipe (1). The elastic oil naan (14) is connected to multiple connecting pipes (15) on the outside, and the multiple connecting pipes (15) are located inside multiple connecting grooves (11).

7. A stainless steel composite pipe connection and fastening assembly as described in claim 6, characterized in that, The other end of the connecting pipe (15) is connected to an expanding oil naan (16), and the expanding oil naan (16) is located inside the expansion hole (12). Hydraulic oil is provided inside the elastic oil naan (14), the connecting pipe (15) and the expanding oil naan (16). The expanding oil naan (16) is provided with a telescopic claw (17) at one end near the central axis of the fastening threaded sleeve (3), and the telescopic claw (17) is slidably connected inside the expansion hole (12) and attached to the outer wall of the stainless steel composite pipe.

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