Device capable of quickly connecting stud flange

Abstract

The utility model discloses a device capable of quickly connecting a stud flange, and relates to the field of petroleum equipment. The groove is formed in the quick-connection flange, the oil circuit port is formed in the outer wall of the quick-connection flange, and the oil circuit port is communicated with the groove; a piston is installed in the groove in a sealed and sliding mode, and a top cover is clamped and fixed to an opening of the groove. The quick connection structure further comprises a tension bolt and a locking bolt, the tension bolt is in threaded connection with a tension nut, and the locking bolt is in threaded connection with a locking nut. Sealing sheaths which are fixedly connected with the piston in a sealing manner are sleeved on the tension bolt and the locking bolt; the sealing sheaths are assembled with the top cover in a sealing and sliding manner; the tensioning bolts are sleeved with locking protective sleeves fixedly connected with the piston in a sealed mode, and the locking protective sleeves are located below the sealing protective sleeves, penetrate through the bottom of the quick connecting flange and abut against the tensioning nuts. The quick connection structure has the advantages that the quick connection structure is arranged on the quick connection flange, so that the locking bolts are pre-tightened synchronously, and the blowout preventer is quick, simple and convenient to install and operate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of petroleum equipment relates to blowout preventer, specifically relates to a device that can be connected to the device of quick connection of planting silk flange. BACKGROUND

[0002] Blowout preventer group is the key equipment in the oil and gas industry, which includes ram blowout preventer, annular blowout preventer and four-way and casing head components. These components can be assembled by flange connection, planting silk connection or clamp connection. Among them, the connection through API standard flange is widely used because of its wide applicability and reliability. In this connection mode, a sealing gasket ring is placed between the two flanges, and the two flanges are fastened together by bolts.

[0003] For large-diameter, high-pressure flange connection, torque wrench, hammer wrench or hammer and other tools are usually used to fasten the bolts and nuts one by one. However, this traditional fastening method has some limitations: about 50% of the torque is consumed by the friction of the bolt end face, 40% by the friction of the threaded pair, and only 10% of the torque is really used to generate pre-tightening force. In addition, this method is time-consuming and labor-intensive, and since the nuts need to be fastened one by one, the sealing gasket ring is unevenly stressed, which may result in unsatisfactory sealing effect. SUMMARY

[0004] The utility model solves the technical problem of time-consuming and laborious blowout preventer connection and provides a device that can quickly connect the planting silk flange. By setting a quick connection structure on the quick connection flange, it realizes synchronous pre-tightening of each locking bolt, making the blowout preventer installation operation fast and simple.

[0005] The technical solution adopted by this utility model is as follows: A device for quickly connecting threaded flanges is provided, including an external flange installed on an external connection device and a quick-connect flange installed on the connector body. The quick-connect flange is provided with a quick-connect structure, which includes a groove on the quick-connect flange and an oil passage on the outer wall of the quick-connect flange. The oil passage is connected to the groove, and a conversion connector or plug is detachably installed inside the oil passage. A piston is slidably installed in the groove, and a top cover is snapped and fixed at the opening of the groove. A cavity communicating with the groove is provided between the piston and the top cover. Quick connection. The structure also includes tension bolts and locking bolts. The top ends of the tension bolts and locking bolts pass through the piston and the top cover and are threadedly connected to the external flange. The bottom ends of the tension bolts and locking bolts pass through the quick-connect flange, and tension nuts are threaded onto the tension bolts, while locking nuts are threaded onto the locking bolts. Both tension bolts and locking bolts are fitted with sealing sleeves that are sealed and fixedly connected to the piston. The sealing sleeves are slidably fitted with the top cover. Locking sleeves are fitted onto the tension bolts that are sealed and fixedly connected to the piston. The locking sleeves are located below the sealing sleeves and pass through the bottom of the quick-connect flange, abutting against the tension nuts.

[0006] When connecting the external flange and the quick-connect flange, the tension bolt and the locking bolt are tightened into the threaded holes on the external flange, respectively. The tension bolt and the locking bolt pass through the passage formed by the sealing sleeve and the locking sleeve on the quick-connect flange, and through the bottom of the quick-connect flange. The tension nut and the locking nut are then threaded onto each other, with the tension nut abutting against the locking sleeve and the locking nut against the end face of the quick-connect flange. When locking the external flange, hydraulic oil is injected into the groove of the quick-connect flange through the oil inlet, pushing the piston downwards along the groove and causing the locking sleeve to move downwards. The locking sleeve then pushes the tension nut. The tension bolts move downwards, and the threaded connection between the tension bolts and the external flange causes the external flange to move downwards and come into contact with the end face of the quick-connect flange. At the same time, the external flange causes the locking bolts to move downwards synchronously, creating a gap between the locking nut and the end face of the quick-connect flange. After tightening the locking nut with a wrench or similar tool until it comes into contact with the end face of the quick-connect flange, the external flange and the quick-connect flange are locked. The sealing gasket between the external flange and the quick-connect flange is uniformly compressed and deformed to achieve a seal. Because each locking bolt is pulled by the external flange and reaches the preload synchronously, a quick connection is achieved, and no extra attention is needed to the assembly sequence, significantly improving assembly efficiency.

[0007] To further optimize this technical solution, the piston is provided with a threaded through hole that matches and penetrates the tension bolt and locking bolt. Both the sealing sleeve and the locking sleeve are threadedly sealed and assembled with the threaded through hole. The quick-connect flange is provided with a locking through hole that matches the threaded through hole and the locking sleeve. The locking sleeve is slidably sealed and assembled with the locking through hole. The top cover is provided with a sealing through hole that matches the threaded through hole and the sealing sleeve. The sealing through hole is slidably sealed and assembled with the sealing sleeve.

[0008] The sealing sleeve and locking sleeve are screwed onto the piston by threads. The structure is simple and easy to assemble. The locking through hole on the quick-connect flange and the sealing through hole on the top cover facilitate the smooth sliding of the locking sleeve and sealing sleeve, ensuring the reliability of operation.

[0009] To further optimize this technical solution, the piston is provided with a piston sealing ring, and the top cover is provided with a top cover sealing ring. Both the piston sealing ring and the top cover sealing ring are in sealing contact with the inner wall of the groove.

[0010] The piston seal ring ensures the sealing performance of the piston sliding along the groove, while the top cover seal ring ensures the sealing performance of the top cover and the groove assembly.

[0011] To further optimize this technical solution, the sealing sleeve is provided with a Y-type sealing ring and an O-type sealing ring. The Y-type sealing ring is in sealing contact with the top cover, and the O-type sealing ring is in sealing contact with the threaded through hole.

[0012] Y-type seals and O-rings are used to ensure the sealing performance of the sealing sleeve and piston assembly, as well as the sealing performance of the sealing sleeve sliding along the top cover.

[0013] To further optimize this technical solution, an O-ring and a Y-ring are respectively provided in the groove, with the O-ring sealing contacting the top cover and the Y-ring sealing contacting the piston.

[0014] O-rings and Y-rings ensure the sealing of the top cover and piston assembly with the groove, preventing hydraulic oil leakage from the groove and ensuring reliable operation.

[0015] To further optimize this technical solution, a recessed platform is provided at the bottom of the groove, and an elastic component is placed inside the recessed platform, with the elastic component abutting against the piston.

[0016] After the external flange and quick-connect flange are unlocked, the oil pressure is released, allowing the piston to actively reset under the support of the elastic components inside the sink, so that the piston can be moved again by hydraulic pressure for quick connection and use, making it flexible in use.

[0017] To further optimize this technical solution, the elastic component is an air spring.

[0018] The elastic component uses an air spring structure, which is simple, stable and reliable in use, and has low operating costs.

[0019] To further optimize this technical solution, the lower ends of both the tension bolt and the locking bolt are tapered structures.

[0020] The tapered structure at the lower end of the tension bolt and locking bolt makes the connection between the tension nut and locking nut and their threaded parts simple and smooth.

[0021] To further optimize this technical solution, the matching tension bolts and tension nuts, as well as the locking bolts and locking nuts, all have trapezoidal threads.

[0022] The tension bolts and locking bolts are connected to the tension nut and locking nut respectively by means of trapezoidal threads, which enhances the connection strength and ensures the firmness and reliability of use.

[0023] To further optimize this technical solution, a self-sealing union connector is connected to the oil inlet, and the self-sealing union connector and the adapter or plug can be detachably installed.

[0024] When using a self-sealing union to install or remove adapters or plugs, hydraulic oil leakage is effectively prevented.

[0025] The beneficial effects of this utility model are as follows:

[0026] 1. When tightening the external flange and quick-connect flange, hydraulic oil is injected into the groove of the oil passage to push the piston down, which in turn moves the locking sleeve down and pushes the tension nut and tension bolt down. The tension bolt is threadedly connected to the external flange, so that the external flange moves down synchronously and is pressed against the end face of the quick-connect flange. The downward movement of the external flange also moves the locking bolt down synchronously, creating a gap between the locking nut and the end face of the quick-connect flange. After tightening the locking nut with a wrench or similar tool until it abuts against the end face of the quick-connect flange, the external flange and quick-connect flange are quickly locked. The sealing gasket between the external flange and quick-connect flange is evenly compressed and deformed to achieve a seal.

[0027] 2. After each locking bolt is pulled down by the external flange, it reaches the preload simultaneously. Therefore, by tightening the locking nut and abutting the end face of the quick-connect flange, a quick locking connection is achieved. Moreover, the tightening operation of the locking nut does not require any special attention to the assembly sequence, which significantly improves the assembly efficiency.

[0028] 3. When unlocking the external flange and quick-connect flange, hydraulic oil is injected into the groove. The hydraulic oil acts on the piston, causing the tension bolt to pull the external flange down and push the locking bolt down, making the locking nut loose from the end face of the quick-connect flange, so that it can be easily unscrewed and quickly unlocked.

[0029] 4. The sealing sleeve and locking sleeve on the piston form a passage on the quick-connect flange, which facilitates the connection of the tension bolt and the locking bolt. It is easy to use. After the external flange and the quick-connect flange are unlocked, the piston is actively reset by releasing the oil pressure in the groove, so that the piston can be moved again by hydraulic pressure for quick connection. It is flexible in use. Attached Figure Description

[0030] Fig. 1 This is a cross-sectional structural schematic diagram of the device for quickly connecting wire-loaded flanges in this embodiment;

[0031] Fig. 2 This is an exploded view of the device for quickly connecting wire-loaded flanges according to this embodiment;

[0032] Fig. 3 This is a schematic diagram of the air spring and quick-connect flange assembly structure in this embodiment.

[0033] In the diagram: 1. External flange; 2. Quick-connect flange; 201. Groove; 2011. O-ring seal; 2012. Y-ring seal; 2013. Countersunk plate; 2014. Air spring; 202. Oil inlet; 203. Cavity; 204. Locking through hole; 3. Piston; 301. Threaded through hole; 302. Piston seal; 4. Top cover; 401. Sealing through hole; 402. Top cover seal; 5. Tensioning bolt; 501. Tensioning nut; 6. Locking bolt; 601. Locking nut; 7. Sealing sleeve; 701. Y-ring seal for sleeve; 702. O-ring seal for sleeve; 8. Locking sleeve. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Please see the appendix Figs. 1-3 A device for quickly connecting wire-loaded flanges includes an external flange 1 that is installed on the external connection equipment and a quick-connect flange 2 that is installed on the body of the connector. The quick-connect flange 2 can be placed on the riser or the four-way connector. The quick-connect flange 2 can also be made into a test flange, a sleeve flange, etc., so that it has the ability to quickly connect.

[0036] The quick-connect flange 2 is equipped with a quick-connect structure, which includes a groove 201 on the flange 2. A top cover 4 is snap-fitted into the opening of the groove 201, facilitating easy disassembly, maintenance, and replacement, ensuring flexibility of use. A sealing ring is provided on the top cover 4 to ensure a tight seal between it and the groove 201. A piston 3 is slidably mounted inside the groove 201, and a cavity 203 is provided between the piston 3 and the top cover 4, communicating with the groove 201. An oil port 202 is provided on the outer wall of the quick-connect flange 2, which communicates with the groove 201. When connected, by installing a conversion connector on the oil inlet 202, it is connected to the hydraulic pump, and hydraulic oil can be injected into the groove 201. The hydraulic oil is injected into the cavity 203, pushing the piston 3 to slide along the groove 201. O-ring 2011 and Y-ring 2012 are respectively installed in the groove 201. O-ring 2011 seals against the top cover 4, and Y-ring 2012 seals against the piston 3. The piston 3 is also equipped with a piston 3 sealing ring, which abuts against the inner wall of the groove 201, thereby preventing hydraulic oil leakage and ensuring reliable use.

[0037] After replacing the adapter in the oil port 202 with a plug, the groove 201 is sealed. When installing the adapter or plug in the oil port 202, in order to prevent the hydraulic oil in the groove 201 from flowing out, a self-sealing union can be installed on the oil port 202. When using the self-sealing union to install or remove the adapter or plug, the hydraulic oil can be effectively prevented from flowing out.

[0038] The quick-connect structure on the quick-connect flange 2 also includes a tension bolt 5 and a locking bolt 6. The bottom ends of the tension bolt 5 and the locking bolt 6 both penetrate the quick-connect flange 2. The tension bolt 5 is threaded with a tension nut 501, and the locking bolt 6 is threaded with a locking nut 601. The top ends of the tension bolt 5 and the locking bolt 6 both penetrate upward through the piston 3 and the top cover 4, and are threadedly assembled with the outer flange 1.

[0039] When the tension bolt 5 and the locking bolt 6 pass through the piston 3, in order to ensure the sealing of their assembly, a sealing sleeve 7 is fitted on both the tension bolt 5 and the locking bolt 6. The sealing sleeve 7 is sealed and assembled with the piston 3, and the sealing sleeve 7 is also sealed and slidably assembled with the top cover 4 to maintain the sealed assembly of the piston 3 and the groove 201. A threaded through hole 301 matching the sealing sleeve 7 is opened on the piston 3. The sealing sleeve 7 is threadedly assembled with the threaded through hole 301, which is easy to assemble. The sealing sleeve 7 is provided with a Y-type sealing ring 701 and an O-type sealing ring 702 for the sleeve. The Y-type sealing ring 701 seals and abuts against the top cover 4, and the O-type sealing ring 702 seals and abuts against the threaded through hole 301, thereby preventing the hydraulic oil in the groove 201 from leaking.

[0040] A locking sleeve 8 is also fitted on the tension bolt 5. The locking sleeve 8 is located below the sealing sleeve 7. The locking sleeve 8 is threaded into the threaded through hole 301 on the piston 3. The locking sleeve 8 passes through the bottom of the quick-connect flange 2 and abuts against the tension nut 501. After the piston 3 is pushed downward along the groove 201 by the hydraulic oil, it pushes the locking sleeve 8 downward. Due to the abutment between the locking sleeve 8 and the tension nut 501, the tension bolt 5 also moves downward and pulls the outer flange 1 and the quick-connect flange 2 to connect, eliminating the gap between the outer flange 1 and the quick-connect flange 2, and creating a gap between the locking nut 601 and the quick-connect flange 2, making it easier to tighten the locking nut 601. After abutting against the quick-connect flange 2, the quick-connect flange 2 and the outer flange 1 are locked. The sealing gasket ring between the outer flange 1 and the quick-connect flange 2 is uniformly compressed and deformed to achieve sealing and realize the quick connection function.

[0041] The working principle of this quick-connect device for threaded flanges is as follows: After tightening the tension bolt 5 and locking bolt 6 into the threaded holes on the outer flange 1, the tension bolt 5 and locking bolt 6 are passed through the passage formed by the sealing sleeve 7 and locking sleeve 8 inside the quick-connect flange 2. After the tension bolt 5 and locking bolt 6 pass through the bottom surface of the quick-connect flange 2, the tension nut 501 and locking nut 601 are tightened on the tension bolt 5 and locking bolt 6, respectively. When locking the outer flange 1 and the quick-connect flange 2, hydraulic oil is injected into the groove 201 of the quick-connect flange 2 through the oil port 202. The hydraulic oil pushes the piston 3 to move down along the groove 201 and also moves the locking sleeve 8 downward. The contact between the locking sleeve 8 and the tension nut 501 pushes the tension nut 501 and tension bolt 5 downward, while the threaded connection between the tension bolt 5 and the outer flange 1 causes the outer flange 1 to move downward and come into contact with the end face of the quick-connect flange 2. Simultaneously, as the external flange 1 moves downward, the locking bolt 6 moves downward synchronously, creating a gap between the locking nut 601 and the end face of the quick-connect flange 2. Using a wrench or similar tool, the locking nut 601 is tightened until it abuts against the end face of the quick-connect flange 2, locking the external flange 1 and quick-connect flange 2. The sealing gasket between the external flange 1 and quick-connect flange 2 is uniformly compressed and deformed to achieve a seal. Because each locking bolt 6 is pulled by the external flange 1 to reach the preload simultaneously, a quick connection is achieved, and no extra attention is needed to the assembly sequence, significantly improving assembly efficiency. After the external flange 1 and quick-connect flange 2 are locked, the oil pressure can be released. When unlocking the external flange 1 and quick-connect flange 2, hydraulic oil is injected again into the groove 201 through the oil inlet 202. The hydraulic oil acts on the piston 3, causing the tension bolt 5 to pull the external flange 1 downward, pushing the locking bolt 6 downward, loosening the lock nut 601 and the end face of the quick-connect flange 2, making it easy to unscrew and achieve quick unlocking. After the external flange 1 and quick-connect flange 2 are unlocked, the oil pressure is released, allowing the piston 3 to actively reset under the action of the air spring 2014, so that it can be quickly connected again.

Claims

1. A device for quickly connecting a wire-loaded flange, comprising an external flange (1) fitted onto an external connection device and a quick-connect flange (2) fitted onto the connector body, characterized in that: The quick-connect flange (2) is provided with a quick-connect structure, which includes a groove (201) on the quick-connect flange (2) and an oil port (202) on the outer wall of the quick-connect flange. The oil port (202) is connected to the groove (201), and a conversion connector or plug is detachably installed in the oil port (202). A piston (3) is slidably installed in the groove (201), and a top cover (4) is snapped and fixed at the opening of the groove (201). A cavity (203) connected to the groove (201) is provided between the piston (3) and the top cover (4). The quick-connect structure also includes alternating tension bolts (5) and locking bolts (6). The top ends of the tension bolts (5) and locking bolts (6) pass through the piston (3) and the top cover (4). The cover (4) is threaded to the external flange (1); the bottom ends of the tension bolt (5) and the locking bolt (6) both penetrate the quick-connect flange (2), and the tension bolt (5) is threaded with a tension nut (501), and the locking bolt (6) is threaded with a locking nut (601); the tension nut (501) and the locking nut (601) are both fitted with a sealing sleeve (7) that is sealed and fixedly connected to the piston (3), and the sealing sleeve (7) is sealed and slidably assembled with the top cover (4); the locking nut (601) is fitted with a locking sleeve (8) that is sealed and fixedly connected to the piston (3), the locking sleeve (8) is located below the sealing sleeve (7), and penetrates the bottom of the quick-connect flange (2), and is sealed and slidably assembled with the quick-connect flange (2).

2. The device for quickly connecting wire-supported flanges according to claim 1, characterized in that: The piston (3) has a threaded through hole (301) that matches and penetrates the tension bolt (5) and locking bolt (6). The sealing sleeve (7) and locking sleeve (8) are both threadedly sealed to the threaded through hole (301). The quick-connect flange (2) has a locking through hole (204) that matches the threaded through hole (301) and locking sleeve (8). The locking sleeve (8) is sealed and slidably assembled with the locking through hole (204). The top cover (4) has a sealing through hole (401) that matches the threaded through hole (301) and sealing sleeve (7). The sealing through hole (401) is sealed and slidably assembled with the sealing sleeve (7).

3. The device for quickly connecting wire-supported flanges according to claim 2, characterized in that: The piston (3) is provided with a piston (3) sealing ring, and the top cover (4) is provided with a top cover (4) sealing ring. Both the piston (3) sealing ring and the top cover (4) sealing ring are sealed and abutted against the inner wall of the groove (201).

4. The device for quickly connecting wire-supported flanges according to claim 2, characterized in that: The sealing sleeve (7) is provided with a Y-type sealing ring (701) and an O-type sealing ring (702) for the sleeve. The Y-type sealing ring (701) for the sleeve is sealed and abuts against the top cover (4), and the O-type sealing ring (702) for the sleeve is sealed and abuts against the threaded through hole (301).

5. The device for quickly connecting wire-supported flanges according to claim 1, characterized in that: The groove (201) is provided with an O-ring (2011) and a Y-ring (2012) for the body, respectively. The O-ring (2011) is sealed and abuts against the top cover (4), and the Y-ring (2012) is sealed and abuts against the piston (3).

6. The device for quickly connecting wire-supported flanges according to claim 5, characterized in that: A recessed platform (2013) is provided at the bottom of the groove (201), and an elastic member is placed in the recessed platform (2013). The elastic member abuts against the piston (3).

7. The device for quickly connecting wire-supported flanges according to claim 6, characterized in that: The elastic component is an air spring (2014).

8. The device for quickly connecting wire-supported flanges according to claim 1, characterized in that: The lower ends of both the tension bolt (5) and the locking bolt (6) are tapered structures.

9. The device for quickly connecting wire-supported flanges according to claim 1, characterized in that: The matching tension bolts (5) and tension nuts (501), as well as the locking bolts (6) and locking nuts (601), all have trapezoidal threads.

10. The device for quickly connecting wire-supported flanges according to claim 1, characterized in that: The oil inlet (202) is connected to a self-sealing union connector, which can be detached and installed with a conversion connector or plug.

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