1. Bolt pretension retractable connector under water, its characterized in that: the flange is connected with the end cover, two sealing rubber cylinders, a gasket, a fixing ring and a top head are sequentially arranged in the axial direction between the flange and the cylinder wall, pre-tightening bolts with the number equal to that of the top heads are arranged between the flange and the buckling plate, the flange is provided with trapezoidal threaded holes, and trapezoidal threads are arranged on the pre-tightening bolts and are matched with the pre-tightening bolts; the large end of each top is provided with a circular groove, the head of the pre-tightening bolt acts in the circular groove, the small end of each top is provided with a threaded hole, the connection is realized by matching a fixing bolt and a fixing ring, the flange end cover and the cylinder wall are provided with sealing rings, the flange is also provided with an annular groove, the large end of each top is positioned in the annular groove, and the outer surface of the cylinder wall is provided with a hanging ring.

2. The underwater bolt-pretensioning telescopic connector according to claim 1, characterized in that: the number of the ejection heads and the number of the pre-tightening bolts are six and are arranged at equal intervals.

3. The underwater bolt-pretensioning telescopic connector according to claim 2, characterized in that: the number of the pinch plates is two, the pinch plates are semicircular, three through holes are uniformly distributed, and the through holes do not influence the rotation work of the pre-tightening bolt.

4. The underwater bolt-pretensioning telescopic connector according to any of claims 1 to 3, characterized in that: the end cover is in clearance fit with the cylinder wall, and the flange is connected with the end cover and indicates that: the end cover is installed on the flange through a fixing bolt, an end cover guiding round platform is designed on the end cover, and the guiding round platform is matched with a flange ring groove on the flange.

5. The underwater bolt-pretensioning telescopic connector according to any of claims 1 to 3, characterized in that: the hoisting ring is hooked by a crane hook, the hoisting ring is placed between two connected pipelines, the cylinder wall and the flange are respectively welded with the two pipelines, the axial extension of the flange is adjusted, a pre-tightening bolt is screwed, the top head pushes the gasket, the gasket axially compresses the sealing rubber cylinder, when the sealing rubber cylinder is extruded and reaches the sealing requirement, the sealing rubber cylinder is kept in sealing performance by a self-locking characteristic locking mechanism with trapezoidal threads, and the pipeline connection is completed.

6. The underwater bolt-pretensioning telescopic connector according to claim 4, characterized in that: the hoisting ring is hooked by a crane hook, the hoisting ring is placed between two connected pipelines, the cylinder wall and the flange are respectively welded with the two pipelines, the axial extension of the flange is adjusted, a pre-tightening bolt is screwed, the top head pushes the gasket, the gasket axially compresses the sealing rubber cylinder, when the sealing rubber cylinder is extruded and reaches the sealing requirement, the sealing rubber cylinder is kept in sealing performance by a self-locking characteristic locking mechanism with trapezoidal threads, and the pipeline connection is completed.

Background

The underwater connector is used for connecting two pipelines underwater, due to errors of manufacturing and underwater installation, axial errors of the two pipelines connected by the connector can be greatly different from each other, and the underwater complex environment is particularly unfavorable for measuring the axial errors of the pipelines, so that the underwater telescopic connector is required to adjust the axial length of the telescopic connector according to the axial actual errors of the pipelines to connect the two pipelines.

However, due to the particularity of the subsea working environment, great difficulties are brought to the operation of the telescopic connector. Therefore, the telescopic connector suitable for underwater provides great convenience for the connection of pipelines.

Disclosure of Invention

The invention mainly aims to provide a telescopic connector which can be axially adjusted and sealed by manual operation under water aiming at the requirements that the underwater pipeline installation has uncertain axial errors and the telescopic connector is required to be axially adjusted and sealed.

The purpose of the invention is realized as follows: the flange is connected with the end cover, two sealing rubber cylinders, a gasket, a fixing ring and a top head are sequentially arranged in the axial direction between the flange and the cylinder wall, pre-tightening bolts with the number equal to that of the top heads are arranged between the flange and the buckling plate, the flange is provided with trapezoidal threaded holes, and trapezoidal threads are arranged on the pre-tightening bolts and are matched with the pre-tightening bolts; the large end of each top is provided with a circular groove, the head of the pre-tightening bolt acts in the circular groove, the small end of each top is provided with a threaded hole, the connection is realized by matching a fixing bolt and a fixing ring, the flange end cover and the cylinder wall are provided with sealing rings, the flange is also provided with an annular groove, the large end of each top is positioned in the annular groove, and the outer surface of the cylinder wall is provided with a hanging ring.

The invention also includes such structural features:

1. the number of the ejection heads and the number of the pre-tightening bolts are six and are arranged at equal intervals.

2. The number of the pinch plates is two, the pinch plates are semicircular, three through holes are uniformly distributed, and the through holes do not influence the rotation work of the pre-tightening bolt.

3. The end cover is clearance fit with the cylinder wall, and the flange is connected with the flange end cover and indicates that: the end cover is installed on the flange through a fixing bolt, an end cover guiding round platform is designed on the end cover, and the guiding round platform is matched with a flange ring groove on the flange.

4. The hoisting ring is hooked by a crane hook, the hoisting ring is placed between two connected pipelines, the cylinder wall and the flange are respectively welded with the two pipelines, the axial extension of the flange is adjusted, a pre-tightening bolt is screwed, the top head pushes the gasket, the gasket axially compresses the sealing rubber cylinder, when the sealing rubber cylinder is extruded and reaches the sealing requirement, the sealing rubber cylinder is kept in sealing performance by a self-locking characteristic locking mechanism with trapezoidal threads, and the pipeline connection is completed.

Compared with the prior art, the invention has the beneficial effects that: the underwater submersible pipeline can be installed in shallow water in an artificial saturation diving mode, the telescopic connector is used for connecting pipelines, the problem that axial errors are generated due to manufacturing and underwater installation of two pipelines connected underwater is solved, the operation time is effectively reduced, and the operation efficiency is improved; the flange is in clearance fit with the cylinder wall, so that the flange can freely stretch out and draw back axially in the cylinder wall and is used for offsetting the axial error of a connected pipeline; the pre-tightening bolt and the flange are provided with matched trapezoidal threads, so that the axial movement of the top head can be realized, and the self-locking function is realized; the structure of the top can ensure that the diameter of the pre-tightening bolt is increased under the condition that the outer diameter of the flange is not increased; the device is safe and reliable to work under the complex conditions of the seabed due to the pure mechanical structure.

The cylinder wall and the flange are designed to be in clearance fit, and before the pre-tightening bolt is screwed down, the flange can freely stretch out and draw back axially in the cylinder wall to offset the axial error of the connected pipeline; the side surface of the cylinder wall is provided with a buckle plate which can ensure that the flange can not fall off the cylinder wall when the flange axially extends and retracts; the flange and the pre-tightening bolt are provided with matched trapezoidal threads, so that when the pre-tightening bolt is tightened, the top can move axially, and after the top moves axially, the sealing performance of the sealing rubber cylinder is ensured by the self-locking characteristic of the trapezoidal threads; 6 pre-tightening bolts are designed, so that labor can be saved when half circles are sequentially screwed; the structure of the plug can ensure that the diameter of the pre-tightening bolts is increased under the condition that the outer diameter of the flange is not increased, and meanwhile, the circular groove of the plug can ensure that each pre-tightening bolt is only used for pushing one plug, so that the torque of rotating the pre-tightening bolts is reduced.

Drawings

Fig. 1 is a schematic overall use of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a side view of the present invention.

Fig. 4 is a cross-sectional view of the present invention.

Fig. 5 is an elevational, three-axis view of the present invention.

The main reference numbers in the figures illustrate: 1 cylinder wall, 2 flanges, 3 jacks, 4 fixing rings, 5 gaskets, 6 sealing rubber cylinders, 6 'sealing rubber cylinders, 7 pre-tightening bolts, 8 buckling plates, 9 fixing bolts, 10 lifting rings, 11 flange trapezoidal threaded holes, 11' pre-tightening bolt trapezoidal threads, 12 flange top ends, 13 flange annular grooves, 14 jack threaded holes, 15 flange side pipelines, 16 cylinder wall side pipelines, 17 flange pipeline extension sections, 18 end covers, 19 buckling plate through holes, 20O-shaped rings, 21 flange annular grooves, 22 end cover guide circular truncated cones, 23 jack circular grooves, 24 end cover annular grooves and 25 flange bottom ends.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 5, the invention relates to an underwater bolt pre-tightening telescopic connector, which comprises 1 cylinder wall 1, 1 flange 2, 1 flange pipeline extension section 17, 6 ejection heads 3, 1 fixing ring 4, 1 gasket 5, 2 sealing rubber cylinders 6, 6', 1 end cover 18, 1O-ring 20, 6 pre-tightening bolts 7, 2 buckle plates 8 and 32 fixing bolts 9, and is characterized in that: the flange 2 can freely stretch out and draw back in the axial direction in the cylinder wall 1, after the stretching position of the flange 2 is determined, the pre-tightening bolts 7 are sequentially screwed up by hand for half a circle, and the operation is circulated, so that the top 3 pushes the gasket 5 to extrude the sealing glue cylinders 6 and 6', and the sealing work of the underwater connector is completed.

As shown in fig. 1 to 5, the present invention is an underwater bolt-pretensioning telescopic connector, wherein: the inner side of the cylinder wall 1 is in clearance fit with the bottom end 25 of the flange, the flange 2 can freely stretch out and draw back in the cylinder wall 1 before the pre-tightening bolt 7 is tightened, and four lifting ring screws 10 are designed on the outer side of the cylinder wall 1. The flange 2 is provided with 6 trapezoidal threaded holes 11 which are matched with trapezoidal threads 11' of the pre-tightening bolts 7; the flange 2 is provided with an annular groove 21 which can be matched with the top head 3; the flange pipeline extension section 17 is designed to facilitate the processing of 6 trapezoidal threaded holes 11 at the bottom end 25 of the flange, and after the trapezoidal threads 11 are processed, the flange pipeline extension section 17 and the flange 2 are welded on land; the flange top end 12 is designed with an end cap 18, so that the gasket 5 and the packing unit 6, 6' are assembled from the flange top end 12. The top 3, the circumference design has 6, and is corresponding with 6 pretension bolts 7, and the main aspects have circular recess 23, and pretension bolt 7 head effect is in circular recess 23, and the other end design has screw hole 14, uses fixing bolt 9 and retainer plate 4 cooperation. The two buckle plates 8 are semicircular and are uniformly provided with three through holes 19, so that the flange 2 can be prevented from being axially pulled out when axially moving in the cylinder wall 1, and meanwhile, the through holes 19 can ensure that the rotation work of the pre-tightening bolt 7 is not influenced. The end cover 18 is in clearance fit with the cylinder wall 1 and is arranged on the flange 2 through a fixing bolt 9; an end cover guide circular truncated cone 22 is designed to be matched with the flange ring groove 21, so that the end cover 18 is ensured to be correctly installed; the end cover 18 is designed with an annular groove 24 which is matched with the O-shaped ring 20, so that impurities can be blocked in the axial moving process of the flange 2, and the sealing performance of the sealing rubber cylinders 6 and 6' is ensured. The two sealing rubber cylinders 6 and 6' are axially arranged, the cross sections of the sealing rubber cylinders are right-angled trapezoids, and double sealing can be realized by mutual matching. The gasket 5 has 1, and the thickening design of gasket 5 can guarantee that when top 3 axial displacement in proper order, can not local axial bulge too big, makes sealed packing element 6, 6' atress uneven, leads to sealed inefficacy. The underwater bolt pre-tightening telescopic connector hooks the hanging ring 10 through a crane hook and is lowered to the seabed. The suspension ring 10 is fixed to the cylinder wall 1 by means of screws 9.

The invention relates to an underwater bolt pre-tightening telescopic connector, which is characterized in that: hooking the lifting ring 10 by using a crane lifting hook, lowering the lifting ring to two ends of a connected pipeline 15 and 16, welding the cylinder wall 1 with the pipeline 16, adjusting the axial extension of the flange 2, welding the flange 2 with the pipeline 15 together, manually screwing the pre-tightening bolt 7, enabling the top 3 to push the gasket 5, enabling the gasket 5 to axially compress the sealing rubber cylinders 6 and 6 ', completing extrusion of the sealing rubber cylinders 6 and 6' and achieving the sealing requirement, completing manual operation, and enabling the sealing rubber cylinders 6 and 6 'to keep the sealing performance by using a self-locking characteristic locking mechanism of the trapezoidal thread 11', and completing pipeline connection.

The invention relates to a working principle and advantages of an underwater bolt pre-tightening telescopic connector, which are as follows:

1. the flange 2 and the cylinder wall 1 of the underwater bolt pre-tightening telescopic connector are in clearance fit, and before the pre-tightening bolt 7 works, the flange 2 can freely extend and retract in the cylinder wall 1 in the axial direction, so that two connected pipelines 15 and 16 with uncertain axial distance can be connected.

2. The cylinder wall 1 is provided with a buckle plate 8 which can prevent the flange 2 from being pulled out of the cylinder wall 1 when the flange is telescopically adjusted, and meanwhile, the rotation work of the pre-tightening bolt 7 cannot be influenced.

3. The structure of the plug 3 can ensure that the diameter of the pre-tightening bolts 7 is increased under the condition that the outer diameter of the flange 2 is not increased, and meanwhile, the circular groove 23 of the plug 3 can ensure that each pre-tightening bolt 7 is only used for pushing one plug 3, so that the torque for rotating the pre-tightening bolts 7 is reduced.

4. The pre-tightening bolt 7 and the flange 2 are provided with matched trapezoidal threads 11 and 11 ', and the self-locking can be realized while the axial movement of the pushing gasket 5 is ensured, so that the sealing performance of the sealing rubber cylinders 6 and 6' is ensured.

5. In consideration of the complex working environment of the seabed, the tool adopts a pure mechanical structure, so that the invention is safer and more reliable.

6. By utilizing the telescopic connector, the axial error of a connected pipeline in manual or underwater robot measurement is avoided, the operation efficiency is high, the manpower and material resources are saved, and the engineering cost is reduced.

In conclusion, the invention provides an underwater bolt pre-tightening telescopic connector which comprises 1 cylinder wall, 1 flange, 6 jacks, 1 fixing ring, 1 gasket, 2 sealing rubber cylinders, 1 end cover, 1O-shaped ring, 6 pre-tightening bolts, 2 buckle plates and 32 fixing bolts. The improvement is as follows: after the axial position of the flange in the cylinder wall is adjusted in a manual saturated diving mode, manually screwing a pre-tightening bolt to enable the top head to push the thick gasket so as to extrude the sealing rubber cylinder, thereby achieving the purpose of sealing; the threaded hole of the flange and the thread of the pre-tightening bolt matched with the threaded hole are trapezoidal threads, and after the pre-tightening bolt is screwed and the sealing rubber barrel is extruded to meet the sealing requirement, the sealing performance of the sealing rubber barrel is kept by the self-locking characteristic of the trapezoidal threads; in the process of screwing the pre-tightening bolts, each pre-tightening bolt is sequentially screwed for a half circle, and the operation is circulated, so that the thick gasket is enabled to integrally move in an approximate axial direction, and the sealing failure caused by uneven stress of the sealing rubber cylinder due to over large local axial protrusion of the thick gasket is prevented; the front end of the top head is provided with a fixed ring, so that when the top head is installed, the effect of primarily fixing the top head is achieved, and the flange is conveniently installed in the barrel wall; the structure of the top head can ensure that the diameter of the pre-tightening bolts is increased under the condition that the outer diameter of the flange is not increased, and meanwhile, the circular groove of the top head can ensure that each pre-tightening bolt is only used for pushing one top head, so that the torque for rotating the pre-tightening bolts is reduced; the end cover enables the gasket and the sealing rubber cylinder to be assembled from the top end of the flange, and is provided with an end cover guiding round table which is matched with a ring groove of the flange to ensure that the end cover is correctly installed in the radial direction; a limiting plate is arranged on the side surface of the cylinder wall to prevent the flange from being pulled out axially; the sealing rubber cylinder is prevented from being extruded by complex mechanisms such as hydraulic pressure and the like, the structure is simpler, the engineering safety is ensured, and the engineering quality is improved.