Quick connecting flange with low pressure control function

Abstract

The utility model discloses a quick connection flange with a low pressure control function, and relates to the field of petroleum equipment. The connecting piece comprises an external connection flange arranged on external connection equipment in a matched mode and a connecting flange arranged on a connecting piece body in a matched mode, the connecting flange is provided with a quick connection structure, the quick connection structure comprises a groove formed in the connecting flange and an oil path opening formed in the outer wall of the connecting flange, and the oil path opening is communicated with the groove; a piston is slidably installed in the groove in a sealed mode, and a gland is in threaded connection with an opening of the groove. The quick connection structure further comprises stud bolts and locking bolts which are matched in number, and the stud bolts and the locking bolts are arranged on the two end faces of the piston respectively. The stud bolt hermetically penetrates through the gland and penetrates through the external connection flange to be connected with the stud nut; the locking bolt penetrates through the connecting flange in a sealed mode and is connected with a locking nut. The quick-connection structure has the advantages that synchronous pre-tightening of the bolts is achieved through the quick-connection structure on the connecting flange, so that the bolts are tightened simply and easily, mounting is quick, simple and convenient, and mounting efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of petroleum equipment and relates to a pipeline connector, in particular to a quick-connect flange with low pressure control. Background Art

[0002] Fittings are essential components for connecting multiple devices. For example, multi-way fittings are pipe connectors with multiple ports used to connect multiple pipes and devices together, or to divide a single pipeline into multiple branches. Multi-way fittings are widely used in piping systems in industries like the petroleum and chemical industries for distributing, mixing, or diverting fluids.

[0003] In oil drilling operations, multi-way fittings are required to connect to blowout preventers (BOPs), other equipment, and pipelines. Flanges are often used to connect these fittings to BOPs and pipelines. Flanges are fastened with bolts and nuts, and sealed with gaskets. To ensure a secure and reliable seal, numerous bolts are typically used to connect flanges. During installation, tools such as torque wrenches, hammer wrenches, or sledgehammers are required to tighten each bolt and nut individually. To ensure even force on the gasket and a reliable seal, the bolts and nuts must be tightened repeatedly, and the proper assembly sequence must be carefully considered. This results in long installation times, low efficiency, and high labor intensity for operators.

[0004] Moreover, repeated tightening of the bolts and nuts may cause uneven force on the sealing gasket, affecting the sealing effect. In addition, when disassembling it, it is also necessary to pay attention to unscrewing the bolts and nuts, which is also time-consuming and laborious. Utility Model Content

[0005] To address the time-consuming and labor-intensive technical issues of connecting connectors to external equipment, this utility model provides a quick-connect flange with low-pressure control. The quick-connect structure on the connecting flange achieves synchronous pre-tightening of the bolts, making bolt tightening simple and easy, enabling quick and easy installation and improving installation efficiency.

[0006] The technical solution adopted by the utility model is: to provide a quick-connect flange with low-pressure control, including an external connection flange matched with an external connection device and a connecting flange matched with a connecting part body, a quick-connect structure is provided on the connecting flange, the quick-connect structure includes a groove provided on the connecting flange and an oil passage provided on the outer wall of the connecting flange, the oil passage is connected to the groove, and a conversion joint or a screw plug is detachably installed in the oil passage; a piston is sealingly and slidingly installed in the groove, and a pressure cover is threadedly connected to the opening of the groove; the quick-connect structure also includes a matching number of threaded bolts and locking bolts, and the threaded bolts and the locking bolts are respectively arranged on the two end surfaces of the piston; the threaded bolts seal through the pressure cover and penetrate through the external connection flange to connect the threaded nut; the locking bolt seals through the connecting flange and is connected with a locking nut.

[0007] The threaded bolt assembled on the piston passes through the gland and then passes through the external flange, and is threadedly connected to the threaded nut. The threaded nut is tightened, and the other end face of the piston is assembled with a locking bolt, which is threadedly connected to the locking nut after passing through the connecting flange to complete the preparation work of the locking assembly. Then the conversion joint is connected to the oil port, and hydraulic oil is filled into the groove with the help of the oil port. The gland seals the opening of the groove to form a closed space in the groove, so that the hydraulic oil pushes the piston to slide along the groove, and simultaneously pulls the threaded bolt and threaded nut to tighten the external flange. And reach the pre-tightening force of the sealing assembly, and then tighten the locking nut to lock the external flange, and there is no need to pay attention to the assembly order of the threaded nut, which can significantly improve the assembly efficiency, and the piston increases the contact area with the hydraulic oil, reduces the pressure demand of the hydraulic oil, increases the safety of use, and reduces the cost of use. After the assembly is completed, after the groove is depressurized, the conversion joint is removed and the threaded plug is replaced to seal the oil outlet to avoid the outflow of hydraulic oil, and to avoid the loosening of the locking nut and the threaded nut causing the connection between the connecting flange and the external flange to be loose, resulting in seal failure, thereby ensuring reliability of use.

[0008] To further optimize this technical solution, thread grooves are circumferentially provided on both end surfaces of the piston, the threaded bolts and the locking bolts are respectively threadedly connected to the thread grooves, and the piston is sealed and slidably assembled with the grooves by means of seals.

[0009] The piston is connected to the planting bolt and the locking bolt respectively through the thread grooves evenly distributed on the two end surfaces of the piston, which is simple to assemble and stable and reliable to use.

[0010] To further optimize the technical solution, the sealing member includes a piston sealing ring provided on the outer wall of the piston, and the piston sealing ring is sealingly and slidingly connected to the inner wall of the groove.

[0011] The piston sealing ring sleeved on the outer wall of the piston ensures the sealing of the assembly with the groove, thereby ensuring the smoothness and reliability of the hydraulic oil pushing the piston to slide along the groove.

[0012] To further optimize the technical solution, the outer wall of the piston is also provided with a wear-resistant belt, which is sealed and slidably assembled with the inner wall of the groove.

[0013] The wear-resistant belt guides and supports the piston, ensuring that the piston maintains the correct position during movement, avoiding wear of the piston sealing ring, protecting it and extending its service life.

[0014] To further optimize this technical solution, a bolt sealing ring is provided on the outer wall of the thread-planting bolt, and the bolt sealing ring is sealed and assembled with the pressure cover.

[0015] The bolt sealing ring ensures the sealing of the threaded bolt and the gland, avoids the leakage of hydraulic oil in the groove, and ensures safety and reliability in use.

[0016] To further optimize the technical solution, a sealing groove is provided on the end face of the connecting flange, and a gland sealing ring is provided in the sealing groove, and the gland sealing ring is sealed and fitted with the end face of the gland.

[0017] After the gland is assembled into place along the groove, the end face of the gland is sealed against the gland sealing ring to ensure the sealing of the groove, avoid leakage of hydraulic oil, and prevent dust and water from entering the groove.

[0018] The beneficial effects of the present invention are:

[0019] 1. The locking bolt at one end of the piston passes through the connecting flange and is connected to the locking nut. The threaded bolt at the other end of the piston passes through the gland, passes through the external flange and is connected to the threaded nut. After tightening the threaded nut, fill the groove with hydraulic oil through the oil port to push the piston to move, and make the threaded bolt and threaded nut pull the external flange to the pre-tightening force. Then tighten the locking nut to lock the external flange. Pay special attention to the smooth assembly of the locking nut, easy operation, and improved assembly efficiency.

[0020] 2. The piston is sealed with the groove by means of the piston seal ring, so as to ensure that the hydraulic oil pushes the piston to move along the groove smoothly and reliably. The wear-resistant belt on the outer wall of the piston guides and supports the piston, ensuring that the piston maintains the correct position during movement, avoiding wear of the piston seal ring, protecting it and extending its service life.

[0021] 3. The bolt sealing ring on the outer wall of the threaded bolt ensures the sealing of the threaded bolt and the gland, preventing the leakage of hydraulic oil in the groove. After the gland is assembled in place along the groove, the end face of the gland is sealed with the gland sealing ring on the end face of the connecting flange, thereby ensuring the sealing of the gland and the groove, preventing the leakage of hydraulic oil, and preventing dust and water from entering the groove.

[0022] 4. After the external flange is locked, release the pressure in the groove, remove the conversion joint, replace the plug to seal the oil passage to prevent the hydraulic oil from flowing out, thereby preventing the locking nut and the planting nut from loosening, thereby ensuring the firmness of the assembly of the connecting flange and the external flange and avoiding seal failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the structure of the quick-connect flange with low pressure control in this embodiment;

[0024] Figure 2 This is a schematic diagram of the structure of the connection flange and the external flange assembled in this embodiment;

[0025] Figure 3 Schematic diagram of the structure of the quick link structure of this embodiment;

[0026] Figure 4 This is a schematic structural diagram of the piston and groove assembly of this embodiment.

[0027] In the figure, 1. Connector body; 2. Connecting flange; 201. Groove; 202. Oil passage; 203. Gland; 204. Sealing groove; 2041. Gland sealing ring; 3. External flange; 4. Piston; 401. Threaded groove; 402. Piston sealing ring; 403. Wear-resistant belt; 5. Threaded bolt; 501. Threaded nut; 502. Bolt sealing ring; 6. Locking bolt; 601. Locking nut. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] Please see the attached Figure 1-4 , a quick-connect flange with low pressure control, including an external flange 3 provided on an external device and a connecting flange 2 provided on a connector body 1, the external flange 3 is assembled with the external device, and a quick-connect structure is provided on the connecting flange 2, which realizes the quick connection of the connecting flange 2 and the external flange 3, thereby connecting the connector body 1 with the external device, the quick-connect structure includes a groove 201 provided on the connecting flange 2 and an oil passage 202 provided on the outer wall of the connecting flange 2, the oil passage 202 is connected to the groove 201, and a conversion joint and a plug are disassembled and installed in the oil passage 202, a piston 4 is sealingly and slidingly installed in the groove 201, a pressure cap 203 is threadedly connected to the opening of the groove 201, and the pressure cap 203 is threadedly assembled with the connecting flange 2 to restrict the piston 4 in the groove 201 and seal the opening of the groove 201, so that a closed space is formed in the groove 201, and then the oil passage is passed through the oil passage After the hydraulic oil is filled into the groove 201 by 202, the piston 4 can be pushed to slide along the groove 201. The piston 4 is slidably assembled with the groove 201 with the help of a seal. The seal is a piston sealing ring 402 sleeved on the outer wall of the piston 4. The piston sealing ring 402 is sealed and slidably connected with the inner wall of the groove 201. The piston sealing ring 402 ensures the sealing of the assembly of the piston 4 and the groove 201, and ensures the smooth sliding of the piston 4. At the same time, the piston 4 increases the contact area with the hydraulic oil, reduces the pressure requirement of the hydraulic oil, increases the safety factor of use, and does not require an additional high-pressure pump, reducing the cost of use. The outer wall of the piston 4 is also sleeved with a wear-resistant belt 403, which is also sealed and slidably assembled with the inner wall of the groove 201. The wear-resistant belt 403 guides and supports the piston 4, ensuring that the piston 4 maintains the correct position during movement, reducing the wear of the piston sealing ring 402, so as to protect it and extend its service life;

[0030] Please see the attached Figure 1-4When the gland 203 is assembled with the groove 201, a sealing groove 204 is provided on the end face of the connecting flange 2, and a gland sealing ring 2041 is provided in the sealing groove 204. After the gland 203 and the connecting flange 2 are assembled in place, the end face of the gland 203 abuts against the end face of the connecting flange 2, and the end face of the gland 203 is sealed and fitted with the gland sealing ring 2041, thereby ensuring the sealing of the groove 201, avoiding leakage of hydraulic oil, and preventing dust and water from entering the groove 201;

[0031] Please see the attached Figure 1-4 , The quick-connect structure on the connecting flange 2 also includes a number and position matching planting bolts 5 and locking bolts 6. The planting bolts 5 and locking bolts 6 are tightened and fixed on the piston 4 with the help of threaded grooves 401. The threaded grooves 401 are provided on both end faces of the piston 4, making it easy to assemble, flexible and easy to use. When the planting bolts 5 pass through the gland 203 and the external flange 3 in a sealed manner, rubber columns are evenly distributed along the circumferential direction at the bottom of the groove 201. The rubber columns support the piston 4, so that the planting bolts 5 are fully extended out of the gland 203 and the external flange 3, and the planting nuts 501 are connected. The outer wall of the planting bolts 5 is sleeved with There is a bolt sealing ring 502, which is used to ensure the sealing of the assembly of the threaded bolt 5 and the pressure cover 203. After the locking bolt 6 is sealed and passed through the connecting flange 2, it is threadedly connected to the locking nut 601. When hydraulic oil is filled into the groove 201 to push the piston 4 to move, the piston 4 synchronously pulls the threaded threaded bolt 5 and the threaded nut 501 to pull the external flange 3 to achieve the pre-tightening force. Then, by tightening the locking bolt 6 and the locking nut 601, the external flange 3 is tightened and fixed to complete the assembly operation. Since the threaded bolt 5 and the threaded nut 501 reach the pre-tightening force synchronously, there is no need to pay extra attention to the assembly sequence, and the operation is simple;

[0032] The working principle of this quick-connect flange with low-pressure control is as follows: the connector body 1 is connected to the external flange 3 of the external connection equipment via the connecting flange 2 provided with the matching connection flange 2 on the pipe mouth. The threaded bolt 5 is assembled with the piston 4 in the groove 201 of the connecting flange 2. The threaded bolt 5 passes through the gland 203 in a sealed manner, penetrates the external flange 3, and is threadedly connected to the threaded nut 501. The threaded nut 501 and the threaded bolt 5 are tightened. The locking bolt 6 connected to the other end of the piston 4 passes through the connecting flange 2 and then is threadedly connected to the locking nut 601. Then, the conversion joint is connected to the oil passage 202, and the conversion joint is connected to the oil pump device, so that the hydraulic oil is injected into the groove 201 through the oil passage 202. The groove 201 is blocked by the pressure cover 203 to form a closed space, so that the hydraulic oil pushes the piston 4 to move along the groove 201, thereby synchronously pulling the threaded bolt 5 and the threaded nut 501, and synchronously reaching the pre-tightening force on the external flange 3, so that the threaded bolt 5 and the threaded nut 501 lock the external flange 3. Then, by tightening the locking nut 601, the external flange 3 is locked. Since the threaded bolt 5 and the threaded nut 501 reach the pre-tightening force synchronously, there is no need to pay attention to the assembly order of the locking nut 601, and it can be tightened, which is simple and labor-saving. At the same time, the piston 4 increases the contact area with the hydraulic oil, reduces the use pressure requirement of the hydraulic oil, improves the safety of use, and reduces the cost of use. After the external flange 3 is assembled, the groove 201 is depressurized and the conversion joint is replaced with a screw plug to prevent leakage of the hydraulic oil in the groove 201, thereby preventing the locking nut 601 and the threaded nut 501 from loosening, causing the connection between the connecting flange 2 and the external flange 3 to be loose, resulting in sealing failure.

Claims

1. A quick-connect flange with low pressure control, comprising an external connection flange (3) matched with an external connection device and a connecting flange (2) matched with a connector body (1), characterized in that: The connecting flange (2) is provided with a quick-connect structure, which includes a groove (201) provided on the connecting flange (2) and an oil passage (202) provided on the outer wall of the connecting flange (2), the oil passage (202) being connected to the groove (201), and a conversion joint or a screw plug being detachably installed in the oil passage (202); a piston (4) is sealingly and slidably installed in the groove (201), and a pressure cover (203) is threadedly connected to the opening of the groove (201); the quick-connect structure also includes a matching number of threaded bolts (5) and locking bolts (6), which are respectively provided on both end surfaces of the piston (4); the threaded bolts (5) sealably pass through the pressure cover (203) and penetrate the external connecting flange (3) to connect with the threaded nut (501); the locking bolt (6) sealably passes through the connecting flange (2) and is connected with the locking nut (601).

2. The quick-connect flange with low pressure control according to claim 1, characterized in that: The piston (4) is provided with thread grooves (401) along the circumferential direction on both end surfaces. The threaded bolts (5) and the locking bolts (6) are respectively threadedly connected to the thread grooves (401). The piston (4) is sealed and slidably assembled with the grooves (201) by means of a sealing member.

3. The quick-connect flange with low pressure control according to claim 2, characterized in that: The sealing member comprises a piston sealing ring (402) provided on the outer side wall of the piston (4), and the piston sealing ring (402) is sealingly and slidingly connected to the inner wall of the groove (201).

4. The quick-connect flange with low pressure control according to claim 3, characterized in that: The outer wall of the piston (4) is also sleeved with a wear-resistant belt (403), and the wear-resistant belt (403) is sealingly and slidingly assembled with the inner wall of the groove (201).

5. The quick-connect flange with low pressure control according to claim 1, characterized in that: The outer wall of the thread-planting bolt (5) is provided with a bolt sealing ring (502), and the bolt sealing ring (502) is sealed and assembled with the pressure cover (203).

6. The quick-connect flange with low pressure control according to claim 1, characterized in that: A sealing groove (204) is provided on the end face of the connecting flange (2), and a gland sealing ring (2041) is provided in the sealing groove (204). The gland sealing ring (2041) is in sealing contact with the end face of the gland (203).

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