Quickly-assembled Christmas tree cap flange

Abstract

The utility model discloses a quick-assembly type Christmas tree cap flange, and particularly relates to the technical field of flanges. The fast-assembly type Christmas tree cap flange comprises a first flange and a second flange, a fixing groove is formed in the first flange, an opening is formed in one side of the fixing groove, flat notches are symmetrically formed in the two sides of the second flange, the fixing groove is matched with the second flange, and the second flange can be conveniently inserted into or moved into the fixing groove. A clamping block is arranged on the first flange and matched with the opening in the fixing groove, when the clamping block is installed on the first flange, the first flange is a complete flange, and when the second flange is located in the fixing groove and the clamping block is located at the opening of the fixing groove, the first flange, the second flange and the clamping block are fixed through a plurality of expansion pin assemblies. According to the quick-assembly type Christmas tree cap flange, the installation efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of flange technology, and in particular to a quick-installation oil well cap flange. Background Technology

[0002] The wellhead flange is a critical device used to seal and protect the wellhead during oil and gas field development. Its main functions are to prevent external impurities from entering, avoid wellhead corrosion, and ensure operational safety. During well completion, workover, or temporary shutdown, the wellhead flange needs to be frequently installed and disassembled. Its installation efficiency, sealing reliability, and ease of operation directly affect operating costs and safety.

[0003] Traditional wellhead flanges for oil production typically use a bolt-fastening structure, where multiple sets of bolts and nuts are used to connect the flange to the wellhead. Each bolt needs to be pre-tightened and calibrated individually, which is time-consuming and labor-intensive.

[0004] Therefore, it is necessary to provide a quick-installation oil well cap flange to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the existing technology, this utility model provides a quick-installation oil well cap flange that can improve installation efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The quick-installation oil well cap flange includes a first flange and a second flange. The first flange has a fixing groove with an opening on one side. The second flange has symmetrical flat cuts on both sides. The fixing groove is adapted to the second flange, allowing the second flange to be easily inserted into or moved inside the fixing groove. The first flange has a locking block that is adapted to the opening on the fixing groove. When the locking block is installed on the first flange, the first flange is a complete flange. When the second flange is located in the fixing groove and the locking block is located at the opening of the fixing groove, the three are fixed by multiple expansion pin components. The multiple expansion pin components pass through the first flange and the second flange, or the first flange, the second flange and the locking block, to achieve the connection and fixation of the first flange, the second flange and the locking block.

[0008] Preferably, the expansion pin assembly includes a cylindrical expansion pin and an expansion pin rod. After the first flange and the second flange are installed in place, the cylindrical expansion pin is first inserted through the first flange and the second flange.

[0009] Preferably, a guide block is provided on the inner wall of the cylindrical expansion pin, and a guide groove is provided on the expansion pin rod. After the two are installed, the guide block is located in the guide groove.

[0010] Preferably, a pressure groove is provided on the first flange, the pressure groove is connected to the fixed groove, and an annular lifting plate adapted to it is slidably sealed inside the pressure groove. A sealing gasket is fixed on the top of the annular lifting plate, and a flow channel hole is provided at the bottom of the pressure groove. A control valve is fixed inside the flow channel hole.

[0011] Preferably, the control valve includes a threaded tube that is threadedly sealed in a flow channel hole. An integrally formed mounting block is formed inside the threaded tube. The mounting block has a mounting hole and a flow hole. The diameter of the mounting hole is larger than the diameter of the flow channel hole. A spring is fixedly installed inside the mounting hole. A baffle is fixedly installed at one end of the spring. A sealing ring is fixed on the side of the baffle near the mounting block. A plurality of leakage holes are formed at one end of the threaded tube.

[0012] Preferably, the quick-installation oil well cap flange further includes an injection head, which is connected to the outlet pipe of the high-pressure liquid delivery device. The injection head includes a first screw cap, which is threadedly connected to a threaded pipe, and a supply pipe is passed through and fixed on the first screw cap.

[0013] Preferably, the quick-installation oil well cap flange further includes a drain head, which includes a second screw cap, and a top rod is fixedly installed inside the second screw cap.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) This utility model uses an expansion pin assembly to replace the traditional bolt connection. The expansion tension of the expansion pin achieves rigid fixation between flanges. No complicated tools are required during installation, and the expansion pin assembly can be removed by hammering during disassembly, which significantly improves the operating efficiency.

[0016] (2) The hydraulically driven sealing gasket of this utility model achieves adaptive pressing with the flange surface by high-pressure liquid. The sealing pressure is dynamically adjusted with the liquid pressure, which can adapt to the sealing requirements under different working conditions and has high sealing reliability.

[0017] (3) The control valve of this utility model has a built-in spring and baffle structure. After the liquid is injected, the flow channel hole is automatically closed to maintain the high pressure state in the pressure tank. When the pressure is released, the pressure release channel is triggered by the liquid release head rod to avoid accidental splashing of high pressure liquid during disassembly and ensure operation safety. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the quick-installation oil well cap flange provided by this utility model;

[0019] Figure 2 for Figure 1 An exploded view of the quick-installation tree cap flange;

[0020] Figure 3 A breakdown diagram of a single component experiencing price increases;

[0021] Figure 4 This is a cross-sectional view of the first and second flanges.

[0022] Figure 5 This is a cross-sectional view of the control valve and the liquid supply head.

[0023] Figure 6 This is a cross-sectional view of the control valve and the discharge head.

[0024] The corresponding names of the reference numerals in the attached drawings are as follows: 1. First flange; 2. Second flange; 3. Flat cut; 4. Fixing groove; 5. Locking block; 7. Expansion pin assembly; 71. Cylindrical expansion pin; 72. Expansion pin rod; 73. Guide block; 74. Guide groove; 8. Pressure groove; 9. Annular lifting plate; 10. Sealing gasket; 11. Flow channel hole; 12. Control valve; 13. Threaded pipe; 14. Mounting block; 15. Mounting hole; 16. Flow hole; 17. Spring; 18. Baffle; 19. Leakage hole; 20. First screw cap; 21. Liquid supply pipe; 22. Second screw cap; 23. Top rod. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0026] Example 1

[0027] like Figure 1-6 As shown, the quick-installation oil well cap flange provided by this utility model includes: a first flange 1 and a second flange 2. The first flange 1 has a fixing groove 4, and an opening is provided on one side of the fixing groove 4. The second flange 2 has symmetrical flat cuts 3 on both sides. The fixing groove 4 is adapted to the second flange 2, and the second flange 2 can be easily inserted into or moved inside the fixing groove 4. The first flange 1 is provided with a locking block 5, which is adapted to the opening on the fixing groove 4. When the locking block 5 is installed on the first flange 1, the first flange is a complete flange. When the second flange 2 is located in the fixing groove 4 and the locking block 5 is located at the opening of the fixing groove 4, the three are fixed by multiple expansion pin components 7. The multiple expansion pin components 7 pass through the first flange 1, the second flange 2, or the first flange 1, the second flange 2 and the locking block 5 to realize the connection and fixation of the first flange 1, the second flange 2 and the locking block 5. The installation operation is simple, convenient and quick. Disassembly is also relatively convenient. As long as the multiple expansion pin components 7 are removed, the first flange 1 and the second flange 2 can be easily and quickly separated.

[0028] Example 2

[0029] like Figure 3As shown, the expansion pin assembly 7 includes a cylindrical expansion pin 71 and an expansion pin rod 72. After the first flange 1 and the second flange 2 are installed in place, the cylindrical expansion pin 71 is first inserted through the first flange 1 and the second flange 2. The first flange 1 and the second flange 2 are fixed under the action of the cylindrical expansion pin 71. In order to ensure that the cylindrical expansion pin 71 maintains a stable expansion force, the expansion pin rod 72 is inserted into the cylindrical expansion pin 71 and in close contact with the inner wall of the cylindrical expansion pin 71. Under the support of the expansion pin rod 72, the cylindrical expansion pin 71 can maintain a stable tension for fixing the first flange 1 and the second flange 2.

[0030] Furthermore, a guide block 73 is provided on the inner wall of the cylindrical expansion pin 71, and a guide groove 74 is provided on the expansion pin rod 72. After the two are installed, the guide block 73 is located in the guide groove 74. The purpose of providing the guide block 73 and the guide groove 74 is that when removing the cylindrical expansion pin 71 and the expansion pin rod 72, the round rod tool can simultaneously contact the expansion pin rod 72 and the guide block 73, and the round rod tool can be hammered, so that the cylindrical expansion pin 71 and the expansion pin rod 72 can be moved at the same time, thereby achieving synchronous removal.

[0031] Example 3

[0032] like Figure 4 As shown, a pressure groove 8 is provided on the first flange 1, which is connected to the fixed groove 4. An annular lifting plate 9 adapted to it is slidably and sealed inside the pressure groove 8. A sealing gasket 10 is fixed on the top of the annular lifting plate 9. A flow channel hole 11 is provided at the bottom of the pressure groove 8. A control valve 12 is fixed inside the flow channel hole 11. In use, the control valve 12 is connected to the high-pressure liquid conveying device, which conveys the high-pressure liquid into the flow channel hole 11 and into the pressure groove 8, pushing the annular lifting plate 9 to move upward. The annular lifting plate 9 drives the sealing gasket 10 to move upward and make tight contact with the second flange 2 until the liquid pressure in the high-pressure liquid conveying device is consistent with the liquid in the pressure groove 8. Then, the control valve 12 is separated from the high-pressure liquid conveying device. At this time, the sealing gasket 10 is squeezed and deformed, thus sealing the first flange 1 and the second flange 2.

[0033] Furthermore, the control valve 12 includes a threaded tube 13 threadedly sealed in a flow channel hole 11. An integrally formed mounting block 14 is formed inside the threaded tube 13. The mounting block 14 has a mounting hole 15 and a flow hole 16. The diameter of the mounting hole 15 is larger than the diameter of the flow channel hole 16. A spring 17 is fixedly installed inside the mounting hole 15. A baffle 18 is fixedly installed at one end of the spring 17. A sealing ring is fixed to the side of the baffle 18 near the mounting block 14. When the high-pressure liquid conveying device interacts with the control... When the control valve 12 is connected and liquid is supplied to the pressure tank 8, the high-pressure liquid will push the baffle 18 to move away from the mounting block 14. When the high-pressure liquid delivery device is separated from the control valve 12, the spring 17 contracts, and at the same time, the high-pressure liquid in the pressure tank 8 also pushes the baffle 18 closer to the mounting block 14 until the baffle 18 is in close contact with the mounting block 14. In this way, the pressure tank 8 can maintain a high-pressure state, thereby ensuring the seal between the first flange 1 and the second flange 2. One end of the threaded pipe 13 is provided with multiple leakage holes 19.

[0034] Furthermore, the quick-installation oil well cap flange also includes an injection head, which is connected to the outlet pipe of the high-pressure liquid delivery device. The injection head includes a first screw cap 20, which is threadedly connected to a threaded pipe 13. A supply pipe 21 is passed through and fixed on the first screw cap 20. When it is necessary to supply liquid to the pressure tank 8, the first screw cap 20 is threadedly installed on the threaded pipe 13, so that the port of the supply pipe 21 is in sealed contact with the installation pipe 14. At this time, the high-pressure liquid in the supply pipe 21 can enter the flow channel hole 16. When the liquid in the pressure tank 8 reaches a specific pressure, and it is necessary to pull out the injection head, the first screw cap 20 is rotated in the opposite direction to move the supply pipe 21 outward. At this time, some residual high-pressure liquid will enter between the inner wall of the threaded pipe 13 and the outer wall of the supply pipe 21, and finally flow out through the leakage hole 19.

[0035] Furthermore, the quick-installation oil well cap flange also includes a drain head, which includes a second screw cap 22. A push rod 23 is fixedly installed inside the second screw cap 22. When the second screw cap 23 is threaded onto the threaded pipe 13, the push rod 23 will contact the baffle 18 and push the baffle 18 to move, causing the high-pressure liquid in the pressure groove 8 to flow out, thereby sealing the first flange 1 and the second flange 2. This is suitable for separating the first flange 1 and the second flange 2.

[0036] Working principle: During installation, firstly, align the second flange 2 with the fixing groove opening of the first flange and insert it. Then, insert the locking block 5 to complete the flange structure, forming a complete annular profile. Next, insert the cylindrical expansion pin 71 through the first flange 1, the second flange 2, and the locking block 5. The expansion tension generated by the expansion pin rod 72 inserted into the expansion pin achieves rigid locking of the three. At the same time, the cooperation between the guide block 73 on the inner wall of the expansion pin and the guide groove 74 of the expansion pin rod ensures synchronous withdrawal during subsequent disassembly. During the sealing stage, high-pressure liquid is injected into the flow channel hole 16 of the control valve 12 through the injection head. The liquid enters the pressure groove 8 through the flow hole 16, pushing the annular lifting plate 9 upward, causing the sealing gasket 10 to fit tightly against the second flange 2. When the liquid pressure stabilizes, rotate the injection head in the opposite direction, causing the spring 17 of the control valve 12 to pull the baffle 18 to reset and close the flow channel hole 16. At this time, the leakage hole 9 discharges the residual liquid, and the pressure groove 8 maintains a constant high pressure to ensure that the sealing gasket is continuously pressed. When disassembling the first flange 1 and the second flange 2, screwing in the second cap 22 of the drain head causes the push rod 23 to push open the baffle 18 to release pressure. Liquid in the pressure tank 8 is discharged through the drain hole 16, and the sealing gasket 10 is released from its compressed state. Then, a round-bar tool is used to hammer the expansion pin 72 and the guide block 73, simultaneously pulling out the expansion pin assembly 7. After removing the retaining block 5, the second flange 2 can be pulled out along the opening direction of the fixing groove, completing the non-destructive separation. The entire process, through the combination of modular mechanical structure and hydraulic control, achieves efficient flange installation, dynamic sealing, and safe disassembly.

Claims

1. A quick-installation oil well cap flange, characterized in that, include: The first flange (1) and the second flange (2) are provided with a fixing groove (4) on the first flange (1) and an opening on one side of the fixing groove (4). The second flange (2) is provided with flat cuts (3) on both sides. The fixing groove (4) is adapted to the second flange (2). The second flange (2) can be easily inserted into or moved inside the fixing groove (4). The first flange (1) is provided with a locking block (5). The locking block (5) is adapted to the opening on the fixing groove (4). When the locking block (5) is installed on the first flange (1), the first flange (1) is a complete flange. When the second flange (2) is located in the fixing groove (4) and the locking block (5) is located at the opening of the fixing groove (4), the three are fixed by multiple expansion pin components (7). The multiple expansion pin components (7) pass through the first flange (1), the second flange (2) or the first flange (1), the second flange (2) and the locking block (5) to realize the connection and fixation of the first flange (1), the second flange (2) and the locking block (5).

2. The quick-installation oil well cap flange according to claim 1, characterized in that, The expansion pin assembly (7) includes a cylindrical expansion pin (71) and an expansion pin rod (72). After the first flange (1) and the second flange (2) are installed in place, the cylindrical expansion pin (71) is first inserted through the first flange (1) and the second flange (2).

3. The quick-installation oil well cap flange according to claim 2, characterized in that, A guide block (73) is provided on the inner wall of the cylindrical expansion pin (71), and a guide groove (74) is provided on the expansion pin rod (72). After the two are installed, the guide block (73) is located in the guide groove (74).

4. The quick-installation oil well cap flange according to claim 1, characterized in that, The first flange (1) is provided with a pressure groove (8), which is connected to the fixed groove (4). The pressure groove (8) is fitted with a matching annular lifting plate (9) in a sliding seal. A sealing gasket (10) is fixed on the top of the annular lifting plate (9). A flow channel hole (11) is provided at the bottom of the pressure groove (8), and a control valve (12) is fixed inside the flow channel hole (11).

5. A quick-installation oil well cap flange according to claim 4, characterized in that, The control valve (12) includes a threaded tube (13) with a threaded seal installed in a flow channel hole (11). An installation block (14) is integrally formed inside the threaded tube (13). An installation hole (15) and a flow hole (16) are provided on the installation block (14). The diameter of the installation hole (15) is larger than the diameter of the flow channel hole (11). A spring (17) is fixedly installed inside the installation hole (15). A baffle (18) is fixedly installed at one end of the spring (17). A sealing ring is fixed on the side of the baffle (18) near the installation block (14). A plurality of leakage holes (19) are provided at one end of the threaded tube (13).

6. The quick-installation oil well cap flange according to claim 5, characterized in that, The quick-installation oil well cap flange also includes an injection head, which is connected to the outlet pipe of the high-pressure liquid delivery device. The injection head includes a first screw cap (20), which is threadedly connected to a threaded pipe (13). A supply pipe (21) is passed through and fixed on the first screw cap (20).

7. A quick-installation oil well cap flange according to claim 5, characterized in that, The quick-installation oil well cap flange also includes a drain head, which includes a second screw cap (22), and a top rod (23) is fixedly installed inside the second screw cap (22).

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