Stretch-resistant double-clamping-sleeve joint structure

Abstract

The utility model provides a tensile double-ferrule joint structure which comprises a ferrule body, a nut sleeve in threaded connection with the ferrule body, a connecting pipe inserted into the nut sleeve and the ferrule body in an attached and sliding mode, external threads arranged on the outer portion of the end, away from the nut sleeve, of the ferrule body and external threads arranged in the nut sleeve. The front clamping sleeve and the rear clamping sleeve are arranged outside the connecting pipe in a sleeving mode, the positioning protruding ring is fixedly connected to the connecting pipe in a sleeving mode, and the clamping sleeve body is fixedly connected to the outer portion of the clamping sleeve body in a sleeving mode. The connecting strength of the connecting pipe and the clamping sleeve body is guaranteed, the pulling force borne by the connecting pipe and the clamping sleeve body can act on the protective sleeve, the anti-stretching effect of the connecting pipe and the clamping sleeve body is effectively improved, and the situation that the connecting pipe and the clamping sleeve body are pulled to cause loose connection is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting technology, and more specifically, to a tensile-resistant double ferrule fitting structure. Background Technology

[0002] The working principle of a ferrule fitting is to insert a steel pipe into the ferrule, tighten it using the ferrule nut, and press against the ferrule to cut into the pipe and seal it. It does not require welding when connecting to a steel pipe, which is beneficial for fire prevention, explosion protection, and high-altitude operations, and eliminates the drawbacks of improper welding. It is suitable for connecting pipelines carrying media such as oil, gas, and water. Ferrule fittings are specifically divided into single ferrule fittings and double ferrule fittings. Due to numerous defects, single ferrule fittings are gradually being replaced by double ferrule fittings. The working principle of a double ferrule fitting is to insert a steel pipe into the ferrule, tighten it using the ferrule nut, and press against the ferrule to cut into the pipe and seal it.

[0003] However, existing double ferrule fittings have low tensile strength and poor locking performance. Pipes connected by double ferrule fittings may experience pulling or dragging during use, which can cause the pipe to easily come off the fitting. In addition, the nut may loosen due to pipe shaking, resulting in insufficient clamping performance of the fitting, affecting the tightness of the connection between the fitting and the pipe, failing to meet safety requirements, and easily causing leakage or even safety hazards. Utility Model Content

[0004] The purpose of this invention is to provide a tensile-resistant double ferrule connector structure to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model provides a tensile-resistant double ferrule connector structure, comprising: a ferrule body; a nut sleeve threadedly connected to the ferrule body; a connecting tube slidably inserted into the nut sleeve and the ferrule body; an external thread disposed on the outside of the end of the ferrule body away from the nut sleeve; a front ferrule and a rear ferrule disposed inside the nut sleeve and fitted outside the connecting tube; a positioning protrusion fixedly fitted onto the connecting tube; a hexagonal protrusion fixedly fitted onto the outside of the ferrule body and adapted to the nut; and a reinforcing component disposed outside the ferrule body, the nut sleeve, the connecting tube, the positioning protrusion, and the hexagonal protrusion.

[0006] The reinforcement components are adapted to improve the stability of the mating of the ferrule body, the nut sleeve, and the connecting pipe.

[0007] Furthermore, the reinforcing component includes a protective sleeve disposed outside the connecting rod, an insertion hole opened on the protective sleeve, a positioning groove opened inside the protective sleeve and adapted to the nut sleeve and the outer wall of the hexagonal convex ring, and fasteners and limiting members disposed on the protective sleeve.

[0008] The nut sleeve and the hexagonal convex ring are both fitted and slidably inserted into the positioning groove;

[0009] The connecting rod is movably slidably inserted into the insertion hole.

[0010] Furthermore, the limiting component includes a plurality of limiting screws with annular array threads mounted on the protective sleeve and arranged perpendicularly to the sleeve body;

[0011] Several of the aforementioned limiting screws abut against the side of the hexagonal convex ring away from the nut sleeve.

[0012] Furthermore, the fastener includes a plurality of fastening screws with annular array threads mounted on the protective sleeve and perpendicularly disposed to the side of the positioning protrusion away from the nut sleeve;

[0013] Several of the fastening screws abut against the side of the positioning protrusion away from the nut sleeve.

[0014] Furthermore, the reinforcing component also includes a rubber sleeve fixed inside the insertion hole;

[0015] The rubber sleeve is movably fitted onto the outside of the connecting pipe.

[0016] Furthermore, the rear retainer has a frustum-shaped annular structure, the inner wall of the retainer body is provided with a conical pressure groove that matches the rear retainer, the inner wall of the nut sleeve is provided with a first outer conical surface, the side of the front retainer away from the rear retainer is provided with a second outer conical surface corresponding to the first outer conical surface, the side of the front retainer close to the rear retainer is provided with a third outer conical surface, and the inner wall of the rear retainer is provided with an inner conical surface corresponding to the third outer conical surface.

[0017] Furthermore, a first sealing ring is fixedly fitted to the outside of the connecting tube, and the two sides of the first sealing ring abut against the positioning protrusion ring and the nut sleeve, respectively. A second sealing ring is provided inside the ferrule body, and the two sides of the second sealing ring abut against the inner wall of the ferrule body and the end of the connecting tube near the ferrule body, respectively.

[0018] Compared with the prior art, the embodiments of this utility model have the following beneficial effects:

[0019] This tensile-resistant double ferrule connector structure, through its reinforced components, restricts the rotation of the ferrule body and nut sleeve after the connecting tube and ferrule body are connected. This prevents the ferrule body from loosening and rotating due to shaking during use, thus ensuring the gripping performance of the connecting tube and the stability of the connection between the connecting tube and the ferrule body. At the same time, with the cooperation of the hexagonal convex ring and the positioning convex ring, the lateral movement of the ferrule body and the connecting tube is restricted. When the connecting tube is pulled or dragged, the tensile force is distributed to the protective sleeve, effectively improving the tensile strength of the connecting tube and the ferrule body, preventing the connecting tube from coming off the ferrule body and causing leakage of the transmission medium, and ensuring the safe use of this ferrule connector structure. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 A perspective view of the present invention is shown;

[0022] Figure 2 A partial front view of the present invention is shown;

[0023] Figure 3 A partial top view of the present invention is shown;

[0024] Figure 4 A partial bottom-view perspective view of this utility model is shown;

[0025] Figure 5 A partial perspective view of the present invention is shown;

[0026] Figure 6 A partial cross-sectional perspective view of the present invention is shown.

[0027] In the picture

[0028] 1. Compression sleeve body; 2. Nut sleeve; 3. Connecting pipe; 4. External thread; 5. Front compression sleeve; 6. Rear compression sleeve; 7. Positioning convex ring; 8. Hexagonal convex ring; 9. Reinforcing component; 10. Protective sleeve; 11. Insertion hole; 12. Positioning groove; 13. Fastener; 14. Limiting component; 15. Limiting screw; 16. Fastening screw; 17. Rubber sleeve; 18. Conical groove; 19. First outer conical surface; 20. Second outer conical surface; 21. Third outer conical surface; 22. Inner conical surface; 23. First sealing ring; 24. Second sealing ring. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0030] like Figure 1-6 As shown, a tensile-resistant double ferrule connector structure includes: a ferrule body 1; a nut sleeve 2 threadedly connected to the ferrule body 1; a connecting tube 3 slidably inserted into the nut sleeve 2 and the ferrule body 1; an external thread 4 disposed on the outside of the end of the ferrule body 1 away from the nut sleeve 2; a front ferrule 5 and a rear ferrule 6 disposed inside the nut sleeve 2 and fitted onto the outside of the connecting tube 3; a positioning protrusion 7 fixedly fitted onto the connecting tube 3; a hexagonal protrusion 8 fixedly fitted onto the outside of the ferrule body 1 and adapted to the nut; and a reinforcing component 9 disposed outside the ferrule body 1, the nut sleeve 2, the connecting tube 3, the positioning protrusion 7, and the hexagonal protrusion 8.

[0031] The reinforcing component 9 is adapted to improve the stability of the mating of the ferrule body 1, the nut sleeve 2, and the connecting pipe 3. In use, the connecting pipe 3 is passed through the nut sleeve 2 and inserted into the ferrule body 1. At this time, the hexagonal convex ring 8 is rotated using a tool to control the rotation of the ferrule body 1, allowing it to move within the nut sleeve 2. This, in turn, pushes the front ferrule 5 and the rear ferrule 6 to move, converting the axial movement of the ferrule body 1 into radial compressive force on the connecting pipe 3. This controls the deformation of the front ferrule 5 and the rear ferrule 6 to clamp the connecting pipe 3, completing the connection between the connecting pipe 3 and the ferrule body 1. The rear ferrule 6 and the front ferrule 5 form an effective double-tight seal between the ferrule body 1 and the connecting pipe 3, preventing leakage of the transmission medium. After the connection is completed, the six faces of the hexagonal convex ring 8 correspond one-to-one with those of the nut sleeve 2. At this point, the reinforcing component 9... The hexagonal convex ring 8 and the nut sleeve 2 can restrict the rotation. When the connecting pipe 3 is shaken, it can prevent the nut sleeve 2 from loosening due to vibration, thus preventing the connection between the nut sleeve 2 and the ferrule body 1 from loosening. This ensures the gripping performance of the connecting pipe 3 and the tightness of the connection between the ferrule body 1 and the connecting pipe 3. At the same time, the reinforcing component 9, together with the hexagonal convex ring 8 and the positioning convex ring 7, can restrict the lateral movement of the ferrule body 1 and the connecting pipe 3. Therefore, when the connecting pipe 3 and the ferrule body 1 are pulled, the tensile force will be applied to the protective sleeve 10 in the reinforcing component 9, which greatly enhances the tensile strength of the connecting pipe 3 and the ferrule body 1. This prevents the connecting pipe 3 from coming off the ferrule body 1 when it is pulled or dragged, thus meeting the connection requirements of the connecting pipe 3.

[0032] Optionally, the reinforcing component 9 includes a protective sleeve 10 disposed outside the connecting rod, an insertion hole 11 opened on the protective sleeve 10, a positioning groove 12 opened inside the protective sleeve 10 and adapted to the outer wall of the nut sleeve 2 and the hexagonal convex ring 8, and fasteners 13 and limiting members 14 disposed on the protective sleeve 10.

[0033] The nut sleeve 2 and the hexagonal convex ring 8 are both fitted and slidably inserted into the positioning groove 12;

[0034] The connecting rod is slidably inserted into the insertion hole 11. After the connecting tube 3 and the ferrule body 1 are stably connected, the angle of the hexagonal convex ring 8 is consistent with the angle of the nut sleeve 2. At this time, the protective sleeve 10 is moved, allowing the connecting tube 3 to move within the insertion hole 11, and allowing the nut sleeve 2 and the hexagonal convex ring 8 to enter the positioning groove 12 within the protective sleeve 10. At this time, the outer walls of the nut sleeve 2 and the hexagonal convex ring 8 abut against the inner wall of the positioning groove 12, thereby restricting the rotation of the nut sleeve 2 and the hexagonal convex ring 8 and preventing the threaded connection between the ferrule body 1 and the nut sleeve 2 from being damaged. The loosening of the ferrule body 1 and the nut sleeve 2 is effectively prevented from causing insufficient gripping performance of the connecting tube 3, thus affecting the tightness of the connection of the connecting tube 3. Then, the fastener 13 and the limiting member 14 are controlled to complete the stable assembly of the protective sleeve 10 and limit the lateral movement of the connecting tube 3 and the ferrule body 1. When the connecting tube 3 is shaken and pulled, the tensile force on the ferrule body 1 and the connecting tube 3 will act on the protective sleeve 10, thereby increasing the tensile strength of the connecting tube 3 and the ferrule body 1 and ensuring the tensile strength of the double ferrule connector structure.

[0035] Optionally, the limiting member 14 includes a plurality of limiting screws 15 that are mounted on the protective sleeve 10 with an annular array thread and are arranged perpendicularly to the sleeve body 1;

[0036] Several of the limiting screws 15 abut against the side of the hexagonal convex ring 8 away from the nut sleeve 2. After the protective sleeve 10 is fitted onto the outside of the connecting pipe 3, the nut sleeve 2 and the ferrule body 1, several limiting screws 15 are rotated to control the tail ends of several limiting screws 15 to contact the ferrule body 1, thereby limiting the movement of the protective sleeve 10 and completing the initial assembly of the protective sleeve 10.

[0037] Optionally, the fastener 13 includes a plurality of fastening screws 16 that are mounted on the protective sleeve 10 with an annular array thread and are perpendicularly arranged to the side of the positioning protrusion 7 away from the nut sleeve 2.

[0038] Several of the fastening screws 16 abut against the side of the positioning protrusion 7 away from the nut sleeve 2. When the protective sleeve 10 is fitted onto the outside of the connecting pipe 3, the nut sleeve 2, and the ferrule body 1, and is initially fixed by the limiting member 14, several fastening screws 16 can be rotated to control the tail ends of several fastening screws 16 to approach and abut against the positioning protrusion 7. As several fastening screws 16 are tightened, the movement of the protective sleeve 10 is controlled, thereby making the limiting member 14 abut against the hexagonal protrusion 8 stably. This ensures that the protective sleeve 10 is stably assembled outside the connecting pipe 3, the nut sleeve 2, and the ferrule body 1, and effectively restricts the movement of the connecting pipe 3.

[0039] Optionally, the reinforcing component 9 also includes a rubber sleeve 17 fixed inside the insertion hole 11;

[0040] The rubber sleeve 17 is movably sleeved on the outside of the connecting pipe 3. When the protective sleeve 10 is stably assembled with the fastener 13 through the limiting member 14 on the outside of the connecting pipe 3, the nut sleeve 2 and the ferrule body 1, the rubber sleeve 17 is placed between the protective sleeve 10 and the connecting pipe 3. When the connecting pipe 3 shakes, it can buffer and protect the connecting pipe 3, thereby improving the stability of the connection of the connecting pipe 3 through the double ferrule joint structure.

[0041] Optionally, the rear retaining sleeve 6 has a frustum-shaped annular structure. The inner wall of the retaining sleeve body 1 is provided with a conical groove 18 that matches the rear retaining sleeve 6. The inner wall of the nut sleeve 2 is provided with a first outer conical surface 19. The side of the front retaining sleeve 5 away from the rear retaining sleeve 6 is provided with a second outer conical surface 20 corresponding to the first outer conical surface 19. The side of the front retaining sleeve 5 close to the rear retaining sleeve 6 is provided with a third outer conical surface 21. The rear retaining sleeve 6 is provided with an inner conical surface 22 corresponding to the third outer conical surface 21. After the connecting tube 3 passes through the nut sleeve 2 and is inserted into the retaining sleeve body 1, the retaining sleeve body is rotated. Body 1 allows the ferrule body 1 to move within the nut sleeve 2. At this time, part of the rear ferrule 6 will be placed within the conical pressure groove 18. As the ferrule body 1 moves, it pushes the rear ferrule 6 to compress the connecting tube 3. At the same time, the inner conical surface 22 on the rear ferrule 6 abuts against the third outer conical surface 21 on the front ferrule 5. When the second outer conical surface 20 on the front ferrule 5 abuts against the first outer conical surface 19 inside the nut sleeve 2, the front ferrule 5 compresses and fixes the connecting tube 3 under the synchronous pushing of the rear ferrule 6. Thus, under the double locking of the front ferrule 5 and the rear ferrule 6, the connection between the connecting tube 3 and the ferrule body 1 is stable.

[0042] Optionally, a first sealing ring 23 is fixedly sleeved on the outside of the connecting pipe 3. The two sides of the first sealing ring 23 abut against the positioning protrusion 7 and the nut sleeve 2, respectively. A second sealing ring 24 is provided inside the ferrule body 1. The two sides of the second sealing ring 24 abut against the inner wall of the ferrule body 1 and the end of the connecting pipe 3 near the ferrule body 1, respectively. After the assembly of the reinforcing component 9 is completed, the connecting pipe 3 and the positioning protrusion 7 can be pushed to stably compress the second sealing ring 24 and the first sealing ring 23, so that the first sealing ring 23 and the second sealing ring 24 are deformed, thereby effectively improving the sealing effect of the first sealing ring 23 and the second sealing ring 24, and thus ensuring the sealing performance of the overall connection between the ferrule body 1 and the connecting pipe 3.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tensile-resistant double ferrule connector structure, characterized in that, include: The system comprises: a ferrule body (1); a nut sleeve (2) threadedly connected to the ferrule body (1); a connecting tube (3) fitted and slidably inserted into the nut sleeve (2) and the ferrule body (1); an external thread (4) located on the outside of the end of the ferrule body (1) away from the nut sleeve (2); a front ferrule (5) and a rear ferrule (6) located inside the nut sleeve (2) and fitted onto the outside of the connecting tube (3); a positioning protrusion (7) fixedly fitted onto the connecting tube (3); a hexagonal protrusion (8) fixedly fitted onto the outside of the ferrule body (1) and adapted to the nut; and a reinforcing assembly (9) located outside the ferrule body (1), the nut sleeve (2), the connecting tube (3), the positioning protrusion (7), and the hexagonal protrusion (8). The reinforcing component (9) is adapted to improve the stability of the mating of the ferrule body (1), the nut sleeve (2) and the connecting pipe (3).

2. The tensile-resistant double ferrule connector structure as described in claim 1, characterized in that, The reinforcement component (9) includes a protective sleeve (10) disposed outside the connecting rod, an insertion hole (11) opened on the protective sleeve (10), a positioning groove (12) opened inside the protective sleeve (10) and adapted to the outer wall of the nut sleeve (2) and the hexagonal convex ring (8), and fasteners (13) and limiting members (14) disposed on the protective sleeve (10); The nut sleeve (2) and the hexagonal convex ring (8) are both fitted and slidably inserted into the positioning groove (12); The connecting rod is movably slidably inserted into the insertion hole (11).

3. The tensile-resistant double ferrule connector structure as described in claim 2, characterized in that, The limiting member (14) includes a plurality of limiting screws (15) that are mounted on the protective sleeve (10) with an annular array thread and are perpendicular to the sleeve body (1); Several of the limiting screws (15) abut against the side of the hexagonal convex ring (8) away from the nut sleeve (2).

4. The tensile-resistant double ferrule connector structure as described in claim 3, characterized in that, The fastener (13) includes a plurality of fastening screws (16) with annular array threads mounted on the protective sleeve (10) and perpendicularly arranged to the side of the positioning protrusion (7) away from the nut sleeve (2); Several of the fastening screws (16) abut against the side of the positioning protrusion (7) away from the nut sleeve (2).

5. The tensile-resistant double ferrule connector structure as described in claim 4, characterized in that, The reinforcing component (9) also includes a rubber sleeve (17) fixed inside the insertion hole (11); The rubber sleeve (17) is movably fitted outside the connecting pipe (3).

6. The tensile-resistant double ferrule connector structure as described in claim 1, characterized in that, The rear sleeve (6) has a frustum-shaped ring structure. The inner wall of the sleeve body (1) is provided with a conical pressure groove (18) that is adapted to the rear sleeve (6). The inner wall of the nut sleeve (2) is provided with a first outer conical surface (19). The side of the front sleeve (5) away from the rear sleeve (6) is provided with a second outer conical surface (20) that corresponds to the first outer conical surface (19). The side of the front sleeve (5) close to the rear sleeve (6) is provided with a third outer conical surface (21). The inner wall of the rear sleeve (6) is provided with an inner conical surface (22) that corresponds to the third outer conical surface (21).

7. The tensile-resistant double ferrule connector structure as described in claim 6, characterized in that, The connecting tube (3) is fixedly fitted with a first sealing ring (23), and the two sides of the first sealing ring (23) abut against the positioning protrusion (7) and the nut sleeve (2) respectively. The ferrule body (1) is provided with a second sealing ring (24), and the two sides of the second sealing ring (24) abut against the inner wall of the ferrule body (1) and the end of the connecting tube (3) near the ferrule body (1) respectively.

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