Hydraulic quick connecting device

Abstract

The invention discloses a hydraulic quick connecting device. The hydraulic quick connecting device comprises a structure body, a driving assembly, a buffering assembly, an isolation hood and the like. A driving assembly is installed outside the structure main body, an isolation hood is installed on the pipe section part of the structure main body, and a buffering assembly is installed at the position, abutting against a flange, of the structure main body; the left side of the hydraulic quick connecting device is connected with a pipeline, the right side of the hydraulic quick connecting device is connected with a flange through a driving assembly clamping jaw, each driving assembly is provided with an oil cylinder, a self-locking function is achieved, and the hydraulic quick connecting device is particularly suitable for fluid conveying of large-diameter pipelines and large-load working conditions. The device is applied to transportation from an offshore oil and gas production platform to a transport ship or from the transport ship to a land receiving station storage tank. Quick connection and separation can be achieved at the tail end of an inlet / outlet pipeline of a stern or a wharf loading and unloading platform.

Description

Technical Field

[0001] The invention relates to a quick connection device, in particular to a hydraulic quick connection device. Background Art

[0002] From the patent application with publication number CN101652595B, a coupling device is known: used for coupling a loading arm such as a marine loading arm to an inlet / outlet pipe of a liquid container, the coupling device comprises a cylindrical tube having a first inner diameter, a first end of the cylindrical tube is provided with a first flange that can be coupled to the loading arm, a second end of the cylindrical tube is provided with a second flange and a quick-action coupling member for coupling the inlet / outlet pipe to the pipe, wherein the quick-action coupling member is suitable for coupling an inlet / outlet pipe having a second inner diameter that is smaller than the first inner diameter.

[0003] The known connection devices have the following defects: the transmission parts are easy to wear when using threaded transmission, and the thread is easy to be stuck when the load is large, which leads to the situation that the clamping load is not synchronized. At the same time, the load capacity of the threaded transmission is mostly used for thread friction, which leads to a small clamping force. The connection and disconnection speed of the threaded transmission is slow. Summary of the invention

[0004] The purpose of the present invention is to provide a hydraulic quick connection device to address the problems existing in the prior art, so as to achieve quick connection and separation with the inlet / outlet pipe flange of a liquid container.

[0005] The technical solution for achieving the purpose of the present invention is: a hydraulic quick connection device, including a structural body, a drive assembly, a buffer assembly and an isolation cover, the drive assembly is evenly distributed and installed on the outer side of the circumference of the structural body to provide a uniform clamping force when clamping the docking flange, the buffer assembly is installed at one end of the structural body connected to the docking flange to protect the connection device and the docking flange during the connection process with the docking flange; the isolation cover is installed on the outer side of the structural body.

[0006] Preferably, the structural body includes a rear end flange, a straight pipe, a front end flange and a connecting bracket, the rear end flange is a standard flange, the rear end flange and the front end flange are respectively welded to both sides of the straight pipe, and the connecting bracket is welded to the outside of the straight pipe close to the rear end flange.

[0007] Preferably, the front end flange and the connecting bracket have bolt holes evenly distributed in an annular direction.

[0008] Preferably, a groove is formed on the inner flange surface of the front end flange, and two sealing grooves are formed on the outer side.

[0009] Preferably, the connecting bracket has an annular step on the side facing the front end flange and on the inner side of the front end flange.

[0010] Preferably, the rear end flange, the straight pipe, the front end flange and the connecting bracket are welded into one body.

[0011] Preferably, the driving assembly includes two rod frames and a driving oil cylinder, one end of each rod frame is connected to the front end flange through a front end connecting plate, and the other end is connected to the rear end flange through a rear end connecting plate, a claw is connected to the inner side of one end of each rod frame close to the front end connecting plate, an adjusting pressure block is connected to the front end of the claw, and a swing plate is connected to the inner side of one end close to the rear end connecting plate, and each claw is rotatably connected to a joint bearing on the outer side of one end close to the swing plate, and a spring assembly is connected between the two joint bearings on the same side, the cylinder barrel of the driving oil cylinder is installed between the two claws, and the cylinder rod of the driving oil cylinder is installed between the two swing plates. When connected, the cylinder rod of the driving oil cylinder drives the swing plate to rotate, pushes the compression spring assembly and drives the claw to rotate, and the adjusting pressure block on the claw presses the docking flange accordingly.

[0012] Preferably, the spring assembly includes a spring rear end cover, a compression spring, and a spring front end cover. One end of the compression spring is connected to the joint bearing at the swing plate end through the spring rear end cover, and the other end is connected to the joint bearing at the claw end through the spring front end cover.

[0013] Preferably, a guide plate is connected to the outer side of the front connecting plate, the two swing plates are installed between the two rod frames through a fixed shaft, and a separation bushing is installed between the swing plates.

[0014] Preferably, the buffer assembly includes a buffer column, a buffer spring, a bolt and a baffle, one end of the buffer column is in the groove, and the other end face is higher than the front end flange end face, the buffer spring is sleeved on the outer shaft of the buffer column, one end of the bolt is in the straight tube, and the other end passes through the baffle and is embedded in the buffer column.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] (1) The flange clamping mechanism of the present invention has a short stroke and a fast docking speed, and is suitable for occasions requiring quick docking;

[0017] (2) The present invention is driven by multiple oil cylinders, has a large clamping force, and is suitable for heavy load conditions;

[0018] (3) The present invention is provided with a buffer assembly to avoid collision damage between the device itself and the opposite flange;

[0019] (4) The driving mechanism of the present invention has a compact structure, a small range of motion, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the axonometric structure of a hydraulic quick connection device of the present invention;

[0021] Figure 2It is a schematic diagram of the axonometric structure of the structural body of the connecting device of the present invention;

[0022] Figure 3 It is a schematic diagram of the main structure of the driving assembly of the connecting device of the present invention;

[0023] Figure 4 It is a schematic diagram of the front cross-sectional structure of the driving assembly of the connecting device of the present invention;

[0024] Figure 5 It is a schematic diagram of the isometric structure of the driving assembly claw of the connecting device of the present invention in an open state;

[0025] Figure 6 is a cross-sectional schematic diagram of a buffer assembly of a connecting device of the present invention;

[0026] In the figure: 1, structural body; 1-1, rear end flange; 1-2, straight pipe; 1-3, front end flange; 1-4, connecting bracket;

[0027] 2. Driving assembly; 2-1. Rod frame; 2-2. Swing plate; 2-3. Spherical bearing; 2-4. Spring rear end cover; 2-5. Compression spring; 2-6. Spring front end cover; 2-7. Clamping claw; 2-8. Adjusting pressure block; 2-9. Front end connecting plate 1; 2-10. Front end connecting plate 2; 2-11. Rear end connecting plate; 2-12. Driving cylinder; 2-13. Rotating shaft; 2-14. Fixed shaft; 2-15. Separation bushing; 2-16. Guide plate;

[0028] 3. Buffer assembly; 3-1. Buffer column; 3-2. Buffer spring; 3-3. Bolt; 3-4. Blocking piece;

[0029] 4. Isolation cover. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-6The present invention provides a technical solution: a hydraulic quick-connect device, comprising a structural body (1), a drive assembly (2), a buffer assembly (3) and an isolation cover (4). The drive assembly (2) is evenly distributed and installed on the outside of the structural body (1) to provide a uniform clamping force when clamping the docking flange. The buffer assembly (3) is installed on the front flange of the structural body (1) to protect the connecting device and the docking flange during the connection process with the docking flange to avoid structural damage. The isolation cover (4) is installed on the outside of the pipe part of the structural body (1) to protect the main structural part of the device and reduce the heat exchange between the connecting device and the outside when transporting low-temperature liquid. The left side of the hydraulic quick-connect device is connected to the pipeline, and the right side is connected to the flange through the claws of the drive assembly (2). Each set of drive assemblies is equipped with an oil cylinder and has a self-locking function. It is particularly suitable for fluid transportation in large-diameter pipelines and large load conditions.

[0032] The structural body (1) is welded by a rear end flange (1-1), a straight pipe (1-2), a front end flange (1-3) and a connecting bracket (1-4). The rear end flange is a standard flange used for connecting a connecting device to a pipe flange, and the front end flange is connected to a docking flange through a driving component. The rear end flange (1-1) and the front end flange (1-3) are respectively welded to both sides of the straight pipe (1-2), and the connecting bracket (1-4) is welded to the outside of the straight pipe (1-2) near the rear end flange (1-1). The rear end flange (1-1) is a standard flange. The front end flange (1-3) has bolt holes evenly distributed in an annular direction, which are used for bolting the front end flange to the front end connecting plate 1 and the front end connecting plate 2 of the driving component (2); the inner flange surface of the front end flange (1-3) is provided with a groove (1-5) for installing a buffer component (3); the outer side of the front end flange is provided with two sealing grooves (1-6) for installing a sealing ring to achieve sealing with the docking flange. The front end flange (1-3) has an annular step (1-7) on its inner side, and the connecting bracket has an annular step (1-8) on the side facing the front end flange (1-3) for mounting the isolation cover (4). The connecting bracket (1-4) has bolt holes evenly distributed in an annular direction for fixing the rear end connecting plate of the drive assembly.

[0033] The driving assembly (2) is composed of a rod frame (2-1), a swing plate (2-2), a joint bearing (2-3), a spring rear end cover (2-4), a compression spring (2-5), a spring front end cover (2-6), a claw (2-7), an adjustment pressure block (2-8), a first front end connecting plate (2-9), a second front end connecting plate (2-10), a rear end connecting plate (2-11), a driving oil cylinder (2-12), a rotating shaft (2-13), a fixed shaft (2-14), a separation bushing (2-15) and a guide plate (2-16). The rod frame (2-1) is respectively welded to the first front end connecting plate (2-9), the second front end connecting plate (2-10) and the rear end connecting plate (2-11), and the first front end connecting plate (2-9), the second front end connecting plate (2-10) and the rear end connecting plate (2-11) are all provided with bolt mounting holes (2-17), and the rod frame is bolted to the structural body and serves as a supporting frame of the connecting rod mechanism of the driving assembly. The swing plate (2-2) is installed between the two rod frames (2-1) through a fixed shaft (2-14), and the separation bushing (2-15) is installed between the two swing plates. The joint bearing (2-3), the spring rear end cover (2-4), the compression spring (2-5), the spring front end cover (2-6), and the joint bearing (2-3) are coaxially connected in series, wherein the joint bearing is threadedly connected to the spring front end cover and the spring rear end cover. The joint bearing (2-3) is respectively installed on the swing plate (2-2) and the outer side of the claw (2-7) through a rotating shaft (2-13). The lower part of the claw (2-7) is installed between the two rod frames (2-1) and is connected to the rod frame (2-1) through a fixed shaft (2-13). The adjustment pressure block (2-8) is bolted to the front end of the claw (2-7) for directly pressing the docking flange. The cylinder barrel of the driving oil cylinder (2-12) is installed between the two clamping claws (2-7), connected with the clamping claws (2-7) and the rod frame (2-1) through a pin shaft (2-13), and the cylinder rod is installed between the two swing plates (2-2). The guide plate (2-16) is bolted to the first front end connecting plate (2-9).

[0034] The buffer assembly (3) is installed at the groove (1-5) on the front end surface of the front end flange (1-3), and comprises a buffer column (3-1), a buffer spring (3-2), a bolt (3-3) and a baffle (3-4). One end of the buffer column (3-1) is in the groove (1-5), and the other end surface is higher than the end surface of the front end flange (1-3). The buffer spring (3-2) is sleeved on the outer shaft of the buffer column (3-1). One end of the bolt (3-3) is in the straight tube (1-2), and the other end passes through the baffle (3-4) and is embedded in the buffer column (3-1). The height of the buffer column is higher than the front end flange surface to provide a buffer protection effect.

[0035] Working principle: The rear flange of the connecting device is connected to the downstream pipeline, and the front flange of the connecting device is clamped and connected to the upstream pipeline flange through the driving component. When docking, one of the connecting device and the docking pipeline flange is a moving part, which moves axially to the other side so that the flanges of the two are basically in contact, and the clamping and fixing is completed by the driving component of the connecting device. The driving component on the connecting device is initially in the open state, such as Figure 5 As shown. After the flange of the connecting device and the flange of the mating pipe are basically in contact (or there is a certain position deviation), the hydraulic system supplies oil, and the cylinder rods of the drive components drive the cylinders to extend synchronously, driving the swing plate to rotate counterclockwise around the fixed axis, thereby pushing the compression spring and driving the claw to rotate, and the adjustment block on the claw presses the mating flange. Finally, the axis of the compression spring is below the center line of the fixed axis of the swing plate, and the mating flange is clamped and produces a self-locking effect.

[0036] The present invention is applied to the transmission from offshore oil and gas production platforms to transport ships or from transport ships to storage tanks at land receiving stations. The terminal of the inlet / outlet pipeline placed at the stern of the ship or the dock loading and unloading platform can realize rapid connection and separation.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic quick connection device, comprising a structural body (1), a drive assembly (2), a buffer assembly (3) and an isolation cover (4), characterized in that: The drive components (2) are evenly distributed and installed on the outer side of the circumference of the structural body (1) to provide a uniform pressing force when clamping the docking flange; the buffer component (3) is installed at one end of the structural body (1) connected to the docking flange to protect the connecting device and the docking flange during the connection process with the docking flange; the isolation cover (4) is installed on the outer side of the structural body (1).

2. A hydraulic quick connection device according to claim 1, characterized in that: The structural body (1) comprises a rear end flange (1-1), a straight pipe (1-2), a front end flange (1-3) and a connecting bracket (1-4); the rear end flange (1-1) is a standard flange; the rear end flange (1-1) and the front end flange (1-3) are respectively welded to two sides of the straight pipe (1-2); and the connecting bracket (1-4) is welded to the outside of the straight pipe (1-2) near the rear end flange (1-1).

3. A hydraulic quick connection device according to claim 2, characterized in that: The front end flange (1-3) and the connecting bracket (1-4) have bolt holes evenly distributed in the annular direction.

4. A hydraulic quick connection device according to claim 2, characterized in that: The front end flange (1-3) has a groove (1-5) on its inner flange surface and two sealing grooves (1-6) on its outer side.

5. A hydraulic quick connection device according to claim 2, characterized in that: The connecting bracket (1-4) has an annular step on the side facing the front end flange (1-3) and on the inner side of the front end flange (1-3).

6. A hydraulic quick connection device according to claim 2, characterized in that: The rear end flange (1-1), the straight pipe (1-2), the front end flange (1-3) and the connecting bracket (1-4) are welded into one body.

7. A hydraulic quick connection device according to claim 2, characterized in that: The driving assembly (2) comprises two rod frames (2-1) and a driving oil cylinder (2-12); one end of each rod frame (2-1) is connected to a front end flange (1-3) via a front end connecting plate, and the other end is connected to a rear end flange (1-1) via a rear end connecting plate (2-11); a claw (2-7) is connected to the inner side of one end of each rod frame (2-1) close to the front end connecting plate, an adjusting pressure block (2-8) is connected to the front end of the claw (2-7), a swing plate (2-2) is connected to the inner side of one end close to the rear end connecting plate (2-11), and each claw (2-7) is connected to the swing plate (2-2). The outer sides of the ends of the moving plates (2-2) close to each other are rotatably connected with joint bearings (2-3), and a spring assembly is connected between the two joint bearings (2-3) on the same side. The cylinder barrel of the driving oil cylinder (2-12) is installed between the two claws (2-7), and the cylinder rod of the driving oil cylinder (2-12) is installed between the two swing plates (2-2). When connected, the cylinder rod of the driving oil cylinder (2-12) drives the swing plate (2-2) to rotate, pushes the compression spring assembly and drives the claws (2-7) to rotate, and the adjustment pressure block on the claws (2-7) presses the docking flange.

8. A hydraulic quick connection device according to claim 7, characterized in that: The spring assembly comprises a spring rear end cover (2-4), a compression spring (2-5), and a spring front end cover (2-6); one end of the compression spring (2-5) is connected to the joint bearing (2-3) at the end of the swing plate (2-2) through the spring rear end cover (2-4), and the other end is connected to the joint bearing (2-3) at the end of the claw (2-7) through the spring front end cover (2-6).

9. A hydraulic quick connection device according to claim 8, characterized in that: The outer side of the front connecting plate is connected to a guide plate (2-16); the two swing plates (2-2) are installed between the two rod frames (2-1) via a fixed shaft (2-14); and a separation bushing (2-15) is installed between the swing plates (2-2).

10. A hydraulic quick connection device according to any one of claims 1 to 9, characterized in that: The buffer assembly (3) comprises a buffer column (3-1), a buffer spring (3-2), a bolt (3-3) and a baffle (3-4); one end of the buffer column (3-1) is in the groove (1-5), and the end face of the other end is higher than the end face of the front flange (1-3); the buffer spring (3-2) is sleeved on the outer shaft of the buffer column (3-1); one end of the bolt (3-3) is in the straight tube (1-2), and the other end passes through the baffle (3-4) and is embedded in the buffer column (3-1).

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