Quick connecting flange

Abstract

The invention discloses a quick connecting flange which comprises a shell, a piston, a cylinder cover and a gland, and a plurality of connecting bolts are arranged in a cavity of the shell; the piston, the cylinder cover and the gland are sequentially installed in the shell from bottom to top, the piston and the cylinder cover move up and down along the shell, the connecting bolt penetrates through the piston, the cylinder cover and the gland and is arranged on an upper oil hole and a lower oil hole in the shell, oil is injected to the lower portion of the piston through the lower oil hole, and the piston is connected with the cylinder cover through the connecting bolt. And the piston is jacked up, the bolt is jacked up, the upper nut is tightened, oil is injected to the upper portion of the piston through the upper oil injection hole, the piston moves downwards, the lower nut is tightened on the lower portion of the bolt, elastic deformation of the bolt is converted into pre-tightening force, and reliable sealing is achieved. The hydraulic wrench can be quickly and reliably connected with the flange under the condition that the hydraulic wrench is difficult to use or a torsion pre-tightening tool is lacked.

Description

Technical Field

[0001] This invention belongs to the field of petroleum equipment technology, and specifically relates to a quick-connect flange for blowout preventers, drilling crosses, crosses, and wellhead connections. Background Technology

[0002] Traditional flange connections require workers to tighten all bolts sequentially and one by one according to a tightening sequence. To achieve the required preload, tools such as torque wrenches and hammers are needed, which is time-consuming and labor-intensive. Furthermore, due to the harsh working conditions at the wellhead, workers sometimes have difficulty using tools, making flange connections extremely inconvenient. Manual tightening may also result in incorrect bolt tightening sequence or incorrect preload, causing seal failure and potentially leading to operational accidents. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a quick-connect flange for connecting blowout preventers, drilling two-way valves, four-way valves, and wellhead flanges, which addresses the above-mentioned problems existing in the use of ordinary flanges.

[0004] The technical problem to be solved by this invention can be achieved through the following technical solution: A quick-connect flange, comprising: The housing has multiple connecting bolts installed inside its cavity; A piston installed inside the housing and moving up and down along the housing, with the connecting bolt passing through the piston; A cylinder head installed within the housing and moving up and down along the housing, wherein the bolt passes through the piston and then through the cylinder head; A gland installed within the housing, the bolts passing through the piston and cylinder head before passing through the gland; The upper and lower oiling holes are provided on the housing. Oil is injected into the lower part of the piston through the lower oiling hole, which lifts the piston and the bolt. The upper nut is tightened, and oil is injected into the upper part of the piston through the upper oiling hole, which causes the piston to move downward and tighten the lower nut at the lower part of the bolt. This converts the elastic deformation of the bolt into preload, achieving a reliable seal.

[0005] In a preferred embodiment of the present invention, a flange is provided at a position above the lower oiling hole adjacent to the connecting bolt and below the upper oiling hole adjacent to the connecting bolt. The flange is embedded in the piston, so that the connecting bolt and the piston move up and down together.

[0006] In a preferred embodiment of the present invention, a retaining ring is provided between the gland and the cylinder head, a portion of which is embedded in the housing and the other portion is pressed onto the cylinder head by the gland.

[0007] In a preferred embodiment of the present invention, a first sealing ring is provided between the connecting bolt and the housing, a second sealing ring is provided between the connecting bolt and the piston, a third sealing ring is provided between the piston and the housing, a fourth sealing ring is provided between the piston and the cylinder head, a fifth sealing ring is provided between the bolt and the cylinder head, and a sixth sealing ring is provided between the cylinder head and the housing.

[0008] In a preferred embodiment of the present invention, a gasket is provided on the contact surface between the housing and the flange of the equipment to be connected.

[0009] The working principle of this invention is as follows: After installing the gasket, place the flange of the equipment to be connected onto the housing of this invention. Pressurize the lower oil injection hole to lift the piston and connecting bolt upwards, and manually tighten the upper nut. Release the pressure from the lower oil injection hole and pressurize the upper oil injection hole again. The piston moves downwards, elongating the connecting bolt. The connecting bolt undergoes elastic deformation, tightening the lower nut. After tightening the lower nut, release the oil pressure. The elastic deformation of the connecting bolt is converted into bolt preload, achieving a reliable seal. Attached Figure Description

[0010] Figure 1 This is a top view of a quick-connect flange according to the present invention.

[0011] Figure 2 This is a front view of a quick-connect flange according to the present invention.

[0012] Figure 3 This is a cross-sectional view of a quick-connect flange according to the present invention.

[0013] Figure 4 for Figure 3 A magnified view of a portion of the image. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0015] See Figures 1 to 4 The quick-connect flange shown in the figure is suitable for quick connection of blowout preventers, drilling four-way valves, two-way valves, and wellhead flanges. It includes a housing 100, multiple connecting bolts 200, a piston 300, a cylinder head 400, a gland 500, and a retaining ring 600.

[0016] Multiple connecting bolts 200 are disposed inside the housing 100 cavity. The piston 300, cylinder head 400, and gland 500 are installed sequentially from top to bottom inside the housing 100 cavity. The connecting bolts 200 pass through the piston 300, cylinder head 400, and gland 500 sequentially from bottom to top. The gland 500 is installed on the cylinder head 400 by gland screws 510.

[0017] The housing 100 is provided with an upper oiling hole 110 and a lower oiling hole 120. A flange 210 is provided above the lower oiling hole 120 and below the upper oiling hole 110, adjacent to the connecting bolt 200. The flange 210 is embedded in the piston 300, so that the connecting bolt 200 and the piston 300 move up and down together.

[0018] A first sealing ring 710 is provided between the connecting bolt 200 and the housing 100, a second sealing ring 720 is provided between the connecting bolt 200 and the piston 300, a third sealing ring 730 and 740 are provided between the piston 300 and the housing 100, a fourth sealing ring 750 is provided between the piston 300 and the cylinder head 400, a fifth sealing ring 760 is provided between the connecting bolt 200 and the cylinder head 400, and a sixth sealing ring 770 is provided between the cylinder head 400 and the housing 100.

[0019] The retaining ring 600 is positioned between the gland 500 and the cylinder head 400. Part of the retaining ring 600 is embedded in the housing 100, and the other part is pressed onto the cylinder head 400 by the gland 500.

[0020] After installing the gasket 900 on the contact surface between the housing 100 and the flange 800 to be connected, place the flange 800 on the housing 100 of this invention. Inject oil into the piston 300 and the lower part of the flange 210 through the lower oiling hole 120 to lift the piston 300 and the connecting bolt 200. Tighten the upper nut 220. Inject oil into the upper part of the piston 300 through the upper oiling hole 110, so that the piston 300 moves downward and tightens the lower nut 230 at the lower part of the connecting bolt 200. This converts the elastic deformation of the connecting bolt 200 into preload, achieving a reliable seal.

Claims

1. A quick-connect flange, characterized in that, include: The housing has multiple connecting bolts installed inside its cavity; A piston installed inside the housing and moving up and down along the housing, with the connecting bolt passing through the piston; A cylinder head installed within the housing and moving up and down along the housing, wherein the bolt passes through the piston and then through the cylinder head; A gland installed within the housing, the bolts passing through the piston and cylinder head before passing through the gland; The upper and lower oiling holes are provided on the housing. Oil is injected into the lower part of the piston through the lower oiling hole, which lifts the piston and the bolt. The upper nut is tightened, and oil is injected into the upper part of the piston through the upper oiling hole, which causes the piston to move downward and tighten the lower nut at the lower part of the bolt. This converts the elastic deformation of the bolt into preload, achieving a reliable seal.

2. The quick-connect flange according to claim 1, characterized in that, A flange is provided above the lower oiling hole of the connecting bolt and below the upper oiling hole of the connecting bolt. The flange is embedded in the piston, so that the connecting bolt and the piston move up and down together.

3. The quick-connect flange according to claim 1, characterized in that, A retaining ring is provided between the gland and the cylinder head. Part of the retaining ring is embedded in the housing, and the other part is pressed onto the cylinder head by the gland.

4. A quick-connect flange according to claim 1, characterized in that, A first sealing ring is provided between the connecting bolt and the housing, a second sealing ring is provided between the connecting bolt and the piston, a third sealing ring is provided between the piston and the housing, a fourth sealing ring is provided between the piston and the cylinder head, a fifth sealing ring is provided between the bolt and the cylinder head, and a sixth sealing ring is provided between the cylinder head and the housing.

5. A quick-connect flange according to claim 1, characterized in that, A gasket is provided on the contact surface between the housing and the flange of the equipment to be connected.

Images