A tensile flexible joint for marine use

Abstract

The present invention discloses a tensile-resistant flexible joint for marine use, comprising a flange inner core, a sealing ring, an inner locking clamp, a split inner liner and a locking outer sleeve. The present invention adopts a clamp and a crimping joint to form a new joint form, the inner locking clamp bites and locks the flexible tube, the bite part destroys the glass fiber layer, and the part is sacrificed in exchange for a high-strength tensile bite force, the crimping locking part composed of the flange inner core, the split inner liner and the locking outer sleeve further locks and prevents slipping, while protecting the remaining glass fiber layer of the flexible tube at the connection, and ensuring the sealing through the sealing ring; the present invention is applicable to steel wire tubes and aramid tubes, as well as glass fiber tubes that are easily broken and high temperature and high pressure environments; at the same time, the present invention is easy to install, only a wrench is needed, and no special crimping devices such as crimping machines and power stations are required.

Description

Technical Field

[0001] The invention relates to the technical field of marine composite pipe joints, in particular to a marine tensile-resistant flexible joint. Background Art

[0002] Existing marine flexible pipe joints usually use crimping joints. In order to ensure the sealing and tensile performance of the crimping joints, the installation of traditional marine flexible pipe crimping joints requires the use of a crimping machine weighing hundreds of pounds. On-site installation is difficult and extremely inconvenient. Some existing clamp joints are easily crushed when the clamps are directly clamped at the joints under high pressure and high temperature environments, which will damage the glass fiber layer of the flexible pipe. The high temperature will also melt the pipe. The sealing performance of the clamp clamping point is difficult to ensure, and it is difficult to apply to marine flexible pipe joints.

[0003] There are also some existing crimping joints that are tightened by manual threads, such as shown in Patent ZL202121531720.2, but this type of crimping joint has insufficient tensile strength and is prone to dynamic fatigue failure and dragging and pulling off. Summary of the invention

[0004] In order to solve the above technical problems, the present invention designs a marine tensile flexible joint.

[0005] The present invention adopts the following technical solution:

[0006] A tensile-resistant flexible joint for marine use comprises a flange inner core, a sealing ring, an inner locking clamp, a split inner liner and a locking outer sleeve. A connecting boss and a clamp groove are arranged on the flange inner core. The connecting boss and the clamp groove are arranged closely. An inner core external thread is arranged on the connecting boss. A clamp clamp platform is arranged on the inner side of the inner locking clamp corresponding to the clamp groove. The clamp clamp platform and the clamp groove are arranged in cooperation. A sealing ring groove is arranged on the front section of the flange inner core. A sealing ring is arranged in the sealing ring groove. The flexible pipe is inserted into the flange inner core. The inner wall of the flexible tube is sealed with the sealing ring, the inner locking clamp clamps the clamp slot and the flexible tube for fastening and fixing. The outer side of the flexible tube is tightly fitted with a split inner liner, the split inner liner and the inner locking clamp are covered with a locking jacket, the locking jacket presses the split inner liner and the inner locking clamp, the locking jacket connection port is provided with an inner jacket thread, which is threadedly connected to the connecting boss through a thread, the outer side of the split inner liner is provided with a wedge-shaped outer wall, and the corresponding connection of the locking jacket is provided with a wedge-shaped inner wall.

[0007] The clamping platform of the two-petal inner locking clamp engages with the clamping groove of the flange inner core, and the clamp is locked by the bolt assembly. The inner teeth of the clamp engage with the outer wall of the flexible tube, effectively holding the flexible tube and preventing the flexible tube from being pulled off from the joint. The locking jacket squeezes the wedge-shaped outer wall of the split inner liner to lock the flexible tube, so that the concave and convex teeth of the split inner liner and the outer wall of the flexible tube engage more and more tightly, effectively preventing the flexible tube from being pulled off from the joint.

[0008] Preferably, a flange is integrally fixedly provided at the rear end of the flange inner core.

[0009] Preferably, the front section of the flange inner core is connected to the flexible tube with a serrated outer wall, and the split inner liner is correspondingly provided with concave and convex teeth to clamp the flexible tube. The serrated outer wall bites with the inner wall of the flexible tube, and the concave and convex teeth in the split inner liner bite with the outer wall of the flexible tube, effectively preventing the flexible tube and the joint from being pulled off.

[0010] Preferably, the inner side of the inner locking clamp is connected to the flexible tube with inner clamp teeth, and the inner clamp teeth clamp the flexible tube.

[0011] Preferably, the inner locking clamp is fixed and tightened by a two-piece clamp through a clamp locking bolt group.

[0012] Preferably, the split inner lining is formed by combining three equal lining petals.

[0013] Preferably, the locking sleeve is provided with a wrench force position cutout to facilitate the locking sleeve to be fastened and locked for installation.

[0014] Preferably, the front section of the flange inner core is provided with two sealing ring grooves, and sealing rings are provided in the sealing ring grooves. The flange inner core is equipped with two sealing rings, and the flexible tube is inserted into the bottom of the flange inner core, and a seal is formed between the inner wall of the flexible tube and the sealing ring to prevent leakage of the internal medium.

[0015] Preferably, the slope of the wedge-shaped outer wall is 2 degrees.

[0016] The beneficial effects of the present invention are as follows: (1) the present invention adopts a new joint form by combining a clamp and a crimping joint. The inner locking clamp bites and locks the flexible tube. The bite part destroys the glass fiber layer and sacrifices the part in exchange for high-strength tensile bite force. The crimping locking part composed of the flange inner core, the split inner lining and the locking outer sleeve further locks and prevents it from falling off while protecting the remaining glass fiber layer of the flexible tube at the connection point, and ensures the sealing through the sealing ring; (2) the present invention is suitable for steel wire tubes and aramid tubes, as well as glass fiber tubes that are easily broken and high temperature and high pressure environments; (3) the present invention is easy to install and only requires a wrench, without the need for special crimping devices such as crimping machines and power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 yes Figure 1 A cross-sectional view in the AA direction;

[0019] Figure 3 It is an exploded view of the present invention;

[0020] Figure 4It is a structural schematic diagram of the flange inner core in the present invention;

[0021] Figure 5 yes Figure 4 A cross-sectional view of

[0022] Figure 6 It is a stereoscopic view of the inner locking clamp in the present invention;

[0023] Figure 7 It is a left side view of the inner locking clamp in the present invention;

[0024] Figure 8 It is a partial cross-sectional view of the inner locking clamp in the present invention;

[0025] Fig. 9 It is a schematic diagram of an internal structure of the split liner in the present invention;

[0026] Fig.10 It is a stereogram of the split lining in the present invention;

[0027] Fig.11 It is a left side view of the split liner in the present invention;

[0028] Fig.12 It is a front view of the locking jacket of the present invention;

[0029] Fig.13 It is a schematic diagram of the internal structure of the locking jacket in the present invention;

[0030] Fig.14 It is a left side view of the locking jacket of the present invention;

[0031] In the figure: 1. flange inner core, 2. sealing ring, 3. flexible tube, 4. inner locking clamp, 5. split inner lining, 6. locking outer sleeve, 7. clamp locking bolt group, 8. flange, 9. inner core outer thread, 10. clamp groove, 11. serrated outer wall, 12. sealing ring groove, 13. clamp base, 14. clamp inner teeth, 15. concave and convex teeth, 16. wedge-shaped outer wall, 17. wrench force position cutout, 18. outer sleeve inner thread, 19. wedge-shaped inner wall. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0033] Example: Figure 1-Figure 3As shown, a tensile-resistant flexible joint for marine use comprises a flange inner core 1, a sealing ring 2, an inner locking clamp 4, a split inner liner 5 and a locking outer sleeve 6. A connecting boss and a clamp groove are arranged on the flange inner core. The connecting boss and the clamp groove are arranged closely. An inner core external thread 9 is arranged on the connecting boss. A clamp clamp platform 13 is arranged on the inner side of the inner locking clamp corresponding to the clamp groove. The clamp clamp platform and the clamp groove are arranged in cooperation. Two sealing ring grooves 12 are arranged on the front section of the flange inner core. A sealing ring is arranged in the sealing ring groove. A flexible pipe 3 is inserted into the flange inner core. The inner core of the flange is close to the clamp groove 10, and a seal is formed between the inner wall of the flexible tube and the sealing ring. The inner locking clamp clamps the clamp groove and the flexible tube to be fastened and fixed. The outside of the flexible tube is close to the clamp groove and is covered with a split liner. The split liner and the inner locking clamp are covered with a locking jacket. The locking jacket presses the split liner and the inner locking clamp. The locking jacket connection port is provided with a jacket internal thread 18, which is threadedly connected to the connecting boss through a thread. The outside of the split liner is provided with a wedge-shaped outer wall 16, and the corresponding connection of the locking jacket is provided with a wedge-shaped inner wall 19.

[0034] like Figure 4 and Figure 5 As shown, the rear end of the flange core is integrally fixed with a flange 8. The front section of the flange core is connected to the flexible pipe with a serrated outer wall 11, and the split inner lining is correspondingly provided with concave and convex teeth 15 to clamp the flexible pipe.

[0035] like Figure 6 , Figure 7 and Figure 8 As shown, the inner side of the inner locking clamp is provided with inner clamp teeth 14 at the connection between the inner side of the inner locking clamp and the flexible tube, and the inner clamp teeth clamp the flexible tube. The inner locking clamp is fixed and fastened by the two clamps through the clamp locking bolt group 8.

[0036] like Fig. 9 , Fig.10 and Fig.11 As shown, the split inner lining is formed by combining three equal lining petals. The slope of the wedge-shaped outer wall is 2 degrees.

[0037] like Fig.12 , Fig.13 and Fig.14 As shown, a wrench force position cutout 17 is provided on the locking sleeve.

[0038] The present invention combines a clamp and a crimping joint to form a new joint form. The inner locking clamp bites and locks the flexible tube. The bite part destroys the glass fiber layer and sacrifices the local area in exchange for high-strength tensile bite force. The crimping locking part composed of the flange inner core, the split lining and the locking outer sleeve further locks and prevents it from falling off, while protecting the remaining glass fiber layer of the flexible tube at the connection point, and ensuring the sealing through the sealing ring. The present invention is suitable for steel wire tubes and aramid tubes, as well as easily broken glass fiber tubes and high temperature and high pressure environments. The present invention is easy to install and only requires a wrench, without the need for special crimping devices such as a crimping machine and a power station.

[0039] When the present invention is in use, the flexible tube is inserted into the flange inner core until it is close to the clamp groove, a seal is formed between the inner wall of the flexible tube and the sealing ring, and the serrated outer wall arranged at the connection between the front section of the flange inner core and the flexible tube clamps the flexible tube, and the clamping platform of the two-petal inner locking clamp bites with the clamp groove of the flange inner core, and the clamp is locked by the bolt group, and the inner teeth of the clamp bite with the outer wall of the flexible tube, effectively bites the flexible tube and prevents the flexible tube and the joint from being pulled off. The split inner lining is composed of three lining petals, the inner wall is provided with concave and convex teeth, and the outer wall has a wedge-shaped slope. The locking sleeve is tightened with the flange inner core thread, so that the concave and convex teeth of the lining petal and the outer wall of the flexible tube bite more and more tightly, effectively preventing the flexible tube and the joint from being pulled off, and the locking sleeve is provided with a wrench clamping space, and the inner thread of the sleeve and the outer thread of the inner core are squeezed after being tightened, so that the split lining petal is squeezed and the inner wall of the lining petal and the outer wall of the flexible tube are slowly squeezed and bitten, thereby completing the locking of the joint and the sealing and tightening of the flexible tube.

[0040] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A marine tensile flexible joint, characterized in that: The utility model comprises a flange inner core, a sealing ring, an inner locking clamp, a split inner liner and a locking sleeve. A connecting boss and a clamp groove are arranged on the flange inner core, and the connecting boss and the clamp groove are arranged closely. An inner core external thread is arranged on the connecting boss, and a clamp clamp platform is arranged on the inner side of the inner locking clamp corresponding to the clamp groove. The clamp clamp platform and the clamp groove are arranged in cooperation with each other. A sealing ring groove is arranged on the front section of the flange inner core, and a sealing ring is arranged in the sealing ring groove. The flexible tube is inserted into the flange inner core until it is close to the clamp groove, and a seal is formed between the inner wall of the flexible tube and the sealing ring. The inner locking clamp clamps the clamp groove and the flexible tube to be fastened and fixed. The outer side of the flexible tube is close to the clamp groove and is provided with a split inner liner. The split inner liner and the inner locking clamp sleeve are provided with a locking sleeve. The locking sleeve presses the split inner liner and the inner locking clamp. The locking sleeve connection port is provided with a sleeve internal thread, which is threadedly connected to the connecting boss through a thread. A wedge-shaped outer wall is arranged outside the split inner liner, and a wedge-shaped inner wall is arranged at the corresponding connection of the locking sleeve.

2. The marine tensile flexible joint according to claim 1 is characterized in that: A flange is integrally fixedly arranged at the rear end of the flange inner core.

3. The marine tensile flexible joint according to claim 1 is characterized in that: A serrated outer wall is provided at the connection between the front section of the flange inner core and the flexible pipe, and concave and convex teeth are correspondingly provided in the split inner lining to clamp the flexible pipe.

4. The marine tensile flexible joint according to claim 1 is characterized in that: The connection between the inner side of the inner locking clamp and the flexible tube is provided with inner teeth of the clamp, and the inner teeth of the clamp clamp the flexible tube.

5. The marine tensile flexible joint according to claim 1 is characterized in that: The inner locking clamp is fixed and tightened by two clamps through a clamp locking bolt group.

6. The marine tensile flexible joint according to claim 1 is characterized in that: The split inner lining is formed by combining three equal lining petals.

7. The marine tensile flexible joint according to claim 1 is characterized in that: The locking sleeve is provided with a wrench force position cutout.

8. The marine tensile flexible joint according to claim 1 is characterized in that: Two sealing ring grooves are arranged on the front section of the flange inner core, and sealing rings are arranged in the sealing ring grooves.

9. The marine tensile flexible joint according to claim 1, characterized in that: The slope of the wedge-shaped outer wall is 2 degrees.

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