阅读说明：本技术 一种液压驱动的周向卡压式海底管道连接器 (Hydraulically-driven circumferential clamping type submarine pipeline connector ) 是由 王立权 李振宇 王刚 贾鹏 于 2019-09-26 设计创作，主要内容包括：本发明提供一种液压驱动的周向卡压式海底管道连接器,包括壳体,壳体是以中间位置为基准的左右对称的中空筒形结构,在壳体的左右两侧与被连接管道之间分别设置有压力环和基体,基体与管道接触,压力环位于在基体与壳体之间,所述壳体内表面设置有两道用于两个基体定位的环形凸肩,壳体左右两侧的内表面的周向均匀设置有液压槽,每个压力环的外表面的周向上均匀设置有与液压槽配合的矩形活塞、内表面设置有增力齿槽结构,基体外表面设置有与增力齿槽结构配合的增力齿结构,在壳体上设置有液压注入口和液压卸载口,在壳体的两端设置有端盖。本发明是一种仅通过周向旋转即可实现卡压式连接的海底管道连接器,为一体式,且具有自锁防松功能。(The invention provides a hydraulically-driven circumferential clamping-pressing type submarine pipeline connector, which comprises a shell, wherein the shell is of a bilaterally symmetrical hollow cylindrical structure taking a middle position as a reference, pressure rings and base bodies are respectively arranged between the left side and the right side of the shell and a pipeline to be connected, the base bodies are in contact with the pipeline, the pressure rings are positioned between the base bodies and the shell, two annular convex shoulders for positioning the two base bodies are arranged on the inner surface of the shell, hydraulic grooves are uniformly arranged on the circumferential direction of the inner surfaces of the left side and the right side of the shell, rectangular pistons matched with the hydraulic grooves are uniformly arranged on the circumferential direction of the outer surface of each pressure ring, reinforcing tooth groove structures are arranged on the inner surfaces of the pressure rings, reinforcing tooth structures matched with the reinforcing tooth groove structures are arranged on the outer surfaces of the base bodies, a hydraulic injection. The invention relates to a submarine pipeline connector which can realize clamping and pressing type connection only through circumferential rotation, is integrated, and has a self-locking and anti-loosening function.)

1. The utility model provides a hydraulic drive's circumference card pressure formula submarine pipeline connector, includes the casing, and the casing is with the hollow cylindrical structure of bilateral symmetry with the intermediate position as the benchmark, is provided with pressure ring and base member respectively between the left and right sides of casing and by the connecting tube, base member and pipeline contact, and the pressure ring is located between base member and casing, its characterized in that: the hydraulic pressure booster comprises a shell, a hydraulic pressure ring, a rectangular piston, a boosting tooth groove structure, a hydraulic injection port, a hydraulic unloading port and end covers, wherein two annular convex shoulders for positioning two base bodies are arranged on the inner surface of the shell, hydraulic grooves are uniformly formed in the circumferential direction of the inner surface of the left side and the right side of the shell, the rectangular piston matched with the hydraulic grooves is uniformly arranged on the circumferential direction of the outer surface of each pressure ring, the boosting tooth groove structure is arranged on the inner surface of the outer surface of each pressure ring, the boosting tooth structure matched with the boosting tooth.

2. A hydraulically driven circumferential clamp-on subsea pipeline connector according to claim 1, characterized by: the force increasing tooth structure is a wavy tooth-shaped structure, and the force increasing tooth groove consists of a groove and an inclined plane arranged between the groove and the groove.

3. A hydraulically driven circumferential clamp-on subsea pipeline connector according to claim 1 or 2, characterized in that: the hydraulic injection ports and the hydraulic relief ports are alternately arranged in the circumferential direction of the housing.

4. A hydraulically driven circumferential clamp-on subsea pipeline connector according to claim 1 or 2, characterized in that: sealing grooves are formed in the contact surface of the end cover and the shell, the rectangular piston and the hydraulic groove, and sealing rubber strips are arranged in the sealing grooves.

5. A hydraulically driven circumferential clamp-on subsea pipeline connector according to claim 3, characterized by: sealing grooves are formed in the contact surface of the end cover and the shell, the rectangular piston and the hydraulic groove, and sealing rubber strips are arranged in the sealing grooves.

Technical Field

The invention relates to a pipeline connecting device, in particular to a hydraulically-driven circumferential clamping type submarine pipeline connector, and belongs to the field of submarine pipeline connectors.

Background

Subsea pipeline connectors are mainly used for installing or repairing subsea oil and gas pipelines. At present, the connection method of the submarine pipeline mainly comprises the following steps: welding, bolt flange connection, clamp connection, clamping jaw connection, clamping pressure connection and the like. The clamping and pressing type connection mainly realizes connection and sealing by the aid of a force-increasing principle of a wedge-shaped inclined surface, and compared with other connection modes, the clamping and pressing type connection is more compact and simpler in structure, and accordingly is higher in reliability. The invention belongs to a clamping and pressing type connection.

The existing technology has the following defects:

at present, the force boosting effect of most of the clamping type pipeline connectors in the circumferential direction is not fully utilized. In addition, most connectors are used with external connecting devices to complete the connection. For example, the invention patent "releasable pipe connector" (invention patent 201610115655.2) is a typical press-fit type connector, in order to realize the radial reinforcement effect of a wedge-shaped structure, a plurality of wedge-shaped conical surfaces are designed in sequence along the axial direction, the connection is completed only by the axial movement of a pressurizing part during installation, the moving stroke is long, and the consumed time is long; in addition, the connector needs to be matched with a connecting tool (patent number: 201310276554.X) of the invention patent of a clamping type mechanical connector to be used together during installation to complete connection, and the connecting tool needs to be removed after connection, so that the installation complexity and difficulty are greatly increased, and the installation time is prolonged.

Disclosure of Invention

The invention aims to provide a hydraulically-driven circumferential clamping-pressing type submarine pipeline connector, which can realize clamping-pressing type connection only through circumferential rotation. The connector and the connecting tool are integrated and have self-locking and anti-loosening functions.

The purpose of the invention is realized as follows: the shell is a bilaterally symmetrical hollow cylindrical structure taking a middle position as a reference, a pressure ring and a base body are respectively arranged between the left side and the right side of the shell and a connected pipeline, the base body is in contact with the pipeline, the pressure ring is positioned between the base body and the shell, two annular convex shoulders for positioning the two base bodies are arranged on the inner surface of the shell, hydraulic grooves are uniformly arranged on the circumferential direction of the inner surface of the left side and the right side of the shell, a rectangular piston matched with the hydraulic grooves is uniformly arranged on the circumferential direction of the outer surface of each pressure ring, a boosting tooth groove structure is arranged on the inner surface of each pressure ring, a boosting tooth structure matched with the boosting tooth groove structure is arranged on the outer surface of the base body, a hydraulic injection port and a hydraulic.

The invention also includes such structural features:

1. the force increasing tooth structure is a wavy tooth-shaped structure, and the force increasing tooth groove consists of a groove and an inclined plane arranged between the groove and the groove.

2. The hydraulic injection ports and the hydraulic relief ports are alternately arranged in the circumferential direction of the housing.

3. Sealing grooves are formed in the contact surface of the end cover and the shell, the rectangular piston and the hydraulic groove, and sealing rubber strips are arranged in the sealing grooves.

Compared with the prior art, the invention has the beneficial effects that: the clamping and pressing type connection is realized only by a circumferential rotating and pushing mode, and the force boosting part does not move axially in the connection process and has very short circumferential stroke, so that the connection speed is higher; the self-locking function of the connector is realized through the wavy tooth-shaped inclined surface, so that additional positioning bolts and other structures are not needed, the overall volume and the structural complexity are reduced, and the use reliability is high; the seal anchoring latch of the invention simultaneously realizes two functions of sealing and anchoring the pipeline.

Drawings

Fig. 1 is a three-dimensional structural sectional view showing a preliminary mounting state of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the preliminary mounting state and the mounting completed state of the present invention.

Fig. 3 is a schematic structural diagram of the housing.

Fig. 4 is a schematic structural view of the end cap.

Fig. 5 is a schematic structural view (including a perspective view, a front view direction and a side view direction) of the pressure ring.

Fig. 6 is a schematic structural view (including a perspective view, a front view direction and a side view direction) of the base.

Detailed Description

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

With reference to fig. 1 to 6, the connector of the present invention is symmetrical in a two-terminal structure. The connector comprises a connector shell, an end cover, a pressure ring, a base body, a fastening bolt and a rubber sealing rubber strip.

The shell is in a hollow cylinder shape, and two end faces of the shell are flange plates matched with the end covers. An annular convex shoulder is arranged in the middle of the inner wall surface of the cylinder body of the shell and is used for being matched and positioned with the end surface of the substrate; 6 hydraulic grooves matched with the pressure ring are uniformly distributed and formed in the inner wall surface of the cylinder body between the flange plate and the annular convex shoulder along the circumferential direction; and a sealing groove is formed around the hydraulic groove and used for mounting a rubber sealing rubber strip. 6 hydraulic injection holes and 6 hydraulic unloading holes are uniformly distributed on the outer surface of the shell at intervals on two sides of the shell.

The pressure ring is in a hollow cylinder shape, and 6 convex rectangular pistons matched with the hydraulic grooves are uniformly distributed on the outer surface of the pressure ring in the circumferential direction; force increasing tooth grooves are uniformly distributed on the inner surface of the pressure ring along the circumferential direction, the tooth width direction of each tooth groove is parallel to the axial direction, the tooth grooves penetrate through the end surfaces of the two sides of the pressure ring, the circumferential shape of each force increasing tooth groove is wavy, each wavy wave trough is provided with a small inclined plane, and the inclined planes are used for limiting the rotation direction of the force increasing teeth after connection is completed, so that the self-locking function of the connector is realized.

The base body is in a hollow cylinder shape, the inner surface and the outer surface of one end of the base body are both in a cylinder shape, and the base body is matched with the annular convex shoulder of the shell in a positioning mode and is fixedly connected with the annular convex shoulder in a welding mode. Force increasing teeth are uniformly distributed on the outer surface of the other end of the base body along the circumferential direction, the circumferential tooth profile of each force increasing tooth is also wavy, the tooth width direction is along the axial direction, and the tooth profile is matched with the force increasing tooth grooves. And a plurality of circumferential sealing anchoring clamping teeth are uniformly distributed on the inner surface of the base body on the same side as the boosting teeth along the axial direction.

The end covers are uniformly provided with bolt through holes, the end covers are fastened on the disk surfaces of the flange plates at two ends through the fastening bolts, and each hydraulic groove and the rectangular piston form a closed hydraulic cylinder structure

The hydraulic grooves are rectangular, the number of the grooves is the same as that of the rectangular pistons, and the bottom surfaces of the grooves are smooth cylindrical surfaces coaxial with the shell.

The rectangular piston is a rectangular bulge on the outer surface of the pressure ring, the shape of the top surface of the piston is the same as that of the bottom surface of the hydraulic groove, and the piston is tightly matched with the rectangular piston after being assembled.

The hydraulic injection hole and the hydraulic unloading hole are both threaded through holes and are communicated with the hydraulic groove. When the connectors are connected, each hydraulic injection hole is connected with a hydraulic pipeline of an underwater operation robot, and the rectangular piston is pushed to move by injecting high-pressure environment-friendly hydraulic oil; when the connector is disconnected, each hydraulic unloading hole is connected with a hydraulic pipeline of the underwater operation robot, and high-pressure hydraulic oil is introduced to push the rectangular piston to move reversely.

Sealing grooves are formed in the disc surface of the flange plate, the inner side of the hydraulic groove, the outer surface of the rectangular piston and the inner side surface of the end cover and used for installing rubber sealing rubber strips to ensure sealing of the hydraulic cylinder structure.

The tooth form of the seal anchoring latch is triangular, a gap is reserved between the top end of the latch and the surface of the pipeline before connection, and the latch is pressed and embedded into the surface of the pipeline in the connection process, so that the seal and pipeline anchoring functions of the connector are realized.

The hardness of the materials of the pressure ring and the shell is greater than that of the base body, the base body is radially contracted to a large extent integrally in the connecting process, and other structures are not deformed obviously.

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which the right half of the connector shown in fig. 1 is illustrated for reasons of symmetry of the structure of the invention:

the assembling process of the connector before entering water comprises the following steps: before entering water, the base body 1 is inserted into the shell 3, the toothless end of the base body is matched with the annular convex shoulder 14 of the shell, the pressure ring 2 is axially inserted into a gap between the shell and the base body, and the base body and the shell are welded and fixed at the annular convex shoulder. Finally, the end caps 5 on both sides are covered and the fastening bolts 4 are tightened. When the connector is assembled, the structural positions of the parts are shown in figure 1.

The underwater connection process comprises the following steps: after the connector is put into water and all hydraulic pipeline joints (not shown in the figure) of the underwater operation robot are respectively connected with the threads of the hydraulic injection holes 13, the underwater robot carries the connector to submerge to a preset water depth position, the connected pipeline 6 is inserted into a specified position from two sides of the base body, and at the moment, the state of the connector is as shown in figure 1, and a small gap exists between the outer wall of the pipeline and the base body.

When the pressure ring is installed, as shown in fig. 2, an underwater robot is used as a power source, high-pressure environment-friendly hydraulic oil is injected into the shell through a hydraulic pipeline, the hydraulic oil flowing into the hydraulic groove 15 and the rectangular piston 17 cannot flow out due to the sealing effect of the inner rubber sealing rubber strips (not shown) embedded into the sealing grooves 11 and 16, the generated pressure pushes the rectangular piston to move clockwise along the circumferential direction relative to the shell, so that the pressure ring integrally rotates clockwise along the circumferential direction relative to the shell, and the pressure ring is welded and fixed with the base body, so that the pressure ring also rotates clockwise relative to the base body. As shown in the enlarged partial view I in FIG. 2, the force-increasing tooth grooves 7 rotate clockwise and circumferentially relative to the force-increasing teeth 9, and because the inclined surfaces of the wave-shaped teeth 8 generate wedge-shaped force-increasing action, the force-increasing tooth grooves press each force-increasing tooth, so that the base body is radially compressed, and the whole base body is radially contracted. The sealing anchoring latch 18 on the inner side of the base body is tightly contacted with the connected pipeline and embedded into the surface of the pipeline, so that the sealing and anchoring effects on the connected pipeline are realized. And finally, removing all the hydraulic pipelines and finishing the underwater installation operation.

The self-locking process is realized: when the rectangular piston moves to be in contact with the side wall of the hydraulic groove, the rectangular piston cannot move continuously, the pressure ring also stops rotating in the circumferential direction, at the moment, as shown in a partial enlarged view II in fig. 2, a small inclined plane 10 of the force-increasing tooth groove is in contact with the tooth top of the force-increasing tooth, so that the pressure ring has the tendency of continuously rotating clockwise in the circumferential direction relative to the base body, the accidental anticlockwise rotation of the pressure ring in the use process is avoided, the blocking effect generated by the small inclined plane is realized, and the self-locking function of the connector is realized.

The underwater relieving process comprises the following steps: the underwater operation robot connects a plurality of hydraulic pipeline joints with the threads of 6 hydraulic unloading holes 12 on the shell respectively. The high-pressure environment-friendly hydraulic oil is injected through the hydraulic pipeline, the pressure action of the hydraulic pipeline breaks through the obstruction of the inclined surface, the rectangular piston is forced to move anticlockwise, and therefore the pressure ring rotates anticlockwise and circumferentially, and the relative position of the partial enlarged view I is recovered from the partial enlarged view II in the figure 2. The basal body is separated from the surface of the pipeline by the sealing anchoring latch under the action of the elasticity of the basal body. At this time, the release of the connector from the pipe is realized.