Flange guiding device for installing under-pressure operation equipment

Abstract

The utility model relates to the technical field of under-pressure operation equipment, in particular to a flange guider for installing under-pressure operation equipment, which comprises a guide pipe, one end of the guide pipe is detachably connected with a first joint, the other end of the guide pipe is detachably connected with a second joint, and the outer diameter of the first joint is larger than that of the guide pipe. The face, away from the guide pipe, of the second connector is detachably connected with a center pipe. The center pipe and the guide pipe are coaxially arranged. The outer wall of the central pipe is sleeved with a guide cone and a locking nut, the guide cone comprises a cylinder part and a cone part connected with the cylinder part, the cylinder part abuts against the second connector, and the cone part abuts against the locking nut. The flange guider can be accurately and quickly inserted into a wellhead flange for pre-positioning, and gradually guides the cylinder part of the guide cone to enter the wellhead flange, so that coaxial positioning of a lower flange of equipment under pressure and an upper flange of the wellhead is realized, personal errors in the process that operators guide the equipment under pressure to be butted and potential safety hazards caused by manually righting the flanges are reduced, and the working efficiency is improved. And the accuracy and efficiency of flange butt joint are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of live work equipment technology, and in particular to a flange guide for the installation of live work equipment. Background Technology

[0002] Live pressure operations refer to operations performed inside the wellbore using specialized equipment (such as live pressure operation machines and sealing devices) while the wellhead of oil, gas, or water is under pressure. During these operations, the pressure inside the wellbore is maintained, eliminating the need for well control (washing) or pressure release. Live pressure operations can protect and maintain the original productivity of the formation, effectively protect formation pressure, avoid oil layer contamination, reduce the frequency of acidizing, fracturing, and other production enhancement measures, and provide favorable conditions for the long-term development and stable production enhancement of oil and gas fields.

[0003] Currently, commonly used live-line working machines are quite heavy (approximately 10-20 tons). When installing live-line working equipment, a crane is needed to lift the entire upper unit, which is then slowly lowered, with ground personnel guiding the connection between the equipment and the wellhead flange using steel cables. However, in actual production, the crane operator and ground personnel are often far from the flange connection point, resulting in a very slow connection process. In strong winds, the lifted upper unit sways significantly, further increasing the difficulty of connecting the equipment to the wellhead flange. If personnel are used to hold the equipment close to the flange, there is a poor coordination between the crane operator and the wellhead personnel, and due to line-of-sight errors, there is a significant risk of collisions and injuries to the wellhead personnel. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the main body of the live working machine being too heavy, making it difficult to connect with the wellhead flange and resulting in low working efficiency, and to provide a flange guide for the installation of live working equipment.

[0005] In a first aspect, this utility model provides a flange guide for installing pressurized equipment, comprising a guide pipe, one end of which is detachably connected to a first connector, and the other end of which is detachably connected to a second connector. The outer diameter of the first connector is larger than the outer diameter of the guide pipe. The side of the second connector opposite to the guide pipe is detachably connected to a central pipe, which is coaxially arranged with the guide pipe. A guide cone and a locking nut are fitted on the outer wall of the central pipe. The guide cone includes a cylindrical part and a conical part connected to the cylindrical part. The cylindrical part abuts against the second connector, and the conical part abuts against the locking nut.

[0006] This utility model provides a flange guide for installing live-line working equipment. The outer diameter of the first connector is larger than the outer diameter of the lead pipe. This design allows for convenient lifting of the lead pipe using a crane through the first connector. During use, the flange guide is inserted into the center of the live-line equipment and gradually lowered until a portion of the cylindrical part of the guide cone protrudes from the lower flange of the live-line equipment. The lead pipe is then secured using the fixing slips of the live-line equipment. The entire live-line equipment is then lifted, allowing the conical part of the guide cone to be accurately and quickly inserted into the wellhead flange for pre-positioning. The cylindrical part of the guide cone is gradually guided into the wellhead flange, achieving coaxial positioning between the lower flange of the live-line equipment and the upper flange of the wellhead. The live-line equipment is then rotated in the same plane using a steel cable to align the holes of the lower flange of the live-line equipment with those of the upper flange of the wellhead, allowing for the insertion of a portion of the bolts. The live-line equipment is then lowered, its load resting on the wellhead flange. The remaining bolts are then connected to complete the installation of the live-line equipment. This design avoids the need for multiple adjustments to positional deviations required in traditional manual methods, reducing human error during the docking process and the safety hazards associated with manually straightening flanges. It significantly improves the accuracy and efficiency of flange docking. Furthermore, the diameter of the cylindrical section can be matched to the flange's inner diameter, further enhancing the self-centering capability of the guide cone. Even in severe weather conditions such as strong winds, the guiding action of the guide pipe and guide cone ensures accurate flange docking, improving the environmental adaptability of this flange guide. Components such as the guide pipe, first connector, second connector, center pipe, guide cone, and lock nut are all detachable. The overall structure is simple and modular, facilitating quick assembly and disassembly. It allows for flexible replacement of guide cones of different sizes to suit various flange dimensions, making it widely applicable. The cylindrical section of the guide cone abuts against the second connector, and the conical section abuts against the lock nut, effectively reducing secondary adjustments caused by guide cone wobbling, lowering operation time, and improving docking reliability.

[0007] Preferably, the outer diameter of the first connector is 6 cm to 10 cm larger than the outer diameter of the lead tube.

[0008] The outer diameter of the first joint is 6-10 cm larger than that of the lead pipe, providing a larger connection area for the lifting device. This allows the lifting device to grip the first joint more securely, reducing the risk of loosening or slipping during the lifting process.

[0009] Preferably, the second connector includes a lead tube connection part and a central tube connection part, wherein the lead tube connection part is threadedly connected to the outer wall of the lead tube, and the central tube connection part is threadedly connected to the inner wall of the central tube.

[0010] The threaded connection allows for easy assembly or disassembly of the lead tube connection and the central tube connection. This modular design facilitates equipment maintenance and replacement. In case of partial damage, the entire device does not need to be replaced; only the damaged parts need to be replaced, thus reducing maintenance costs and time.

[0011] Preferably, the second connector further includes a protrusion located between the lead tube connection portion and the central tube connection portion, and the column portion abuts against the protrusion.

[0012] The protrusion provides a clear positioning reference for the column. When the column abuts against the protrusion, it effectively restricts the axial movement of the column, ensures the coaxiality between the column and the second joint, improves the alignment accuracy of the overall device, facilitates the smooth flange docking process, and avoids increased docking difficulty due to component misalignment.

[0013] Preferably, the protrusion has a regular polygonal structure.

[0014] Setting the protrusions as regular polygonal structures, such as squares or hexagons, allows for better integration with specialized tools (such as pipe wrenches), facilitating the installation, adjustment, or disassembly of equipment. The polygonal protrusion design also allows tools to grip the protrusions more securely, reducing operational difficulties and safety risks caused by slippage.

[0015] Preferably, the second connector is capable of sealing at least one end of the lead tube.

[0016] The second connector 12 can seal at least one end of the lead pipe, effectively preventing foreign objects from falling into the lead cone during flange alignment.

[0017] Preferably, the outer wall of the end where the central tube connects to the central tube connection portion has a regular polygonal structure.

[0018] The outer wall of the end where the central tube connects to the central tube connector is set to a regular polygonal structure, such as a regular square or a regular hexagon, which can be better combined with special tools (such as pipe wrenches), facilitates the connection between the central tube and the central tube connector, and provides convenience for the installation, adjustment or disassembly of the equipment.

[0019] Preferably, the transition section from the cylindrical part to the conical part has a rounded chamfered structure.

[0020] The rounded chamfer design makes the transition section smoother, which can better guide the flange of the pressurized equipment to move from the cylindrical part to the conical part, and then connect with the wellhead flange.

[0021] Preferably, it further includes a gasket located between the conical portion and the locking nut.

[0022] The shim prevents the cone from directly contacting the lock nut, thus preventing wear or damage caused by direct friction during use. This extends the service life of both the cone and the lock nut, and reduces the maintenance and replacement costs of the equipment. In complex well site environments, the lock nut may become loose. The shim provides additional contact and friction to slow down the loosening of the nut and maintain the stability of the device.

[0023] Preferably, the first connector and the second connector are threadedly connected to the lead tube, the second connector is threadedly connected to the center tube, the lead cone is interference-fitted to the center tube, and the center tube is threadedly connected to the lock nut.

[0024] The flange guide features multiple connection methods, making it more reliable and stable in complex well site environments. It boasts excellent sealing, vibration resistance, and adaptability, while also facilitating installation, disassembly, and maintenance. This design effectively enhances the overall performance of the equipment, meeting the demands for high-intensity, high-precision, and high-stability operations.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] 1. The flange guide provided by this utility model for installing live-line work equipment, by setting a guide cone, the cone part of which can be accurately inserted into the wellhead flange for pre-positioning, and gradually guides the cylindrical part of the guide cone into the wellhead flange, realizing the coaxial positioning of the lower flange of the live-line work equipment and the upper flange of the wellhead. Then, by rotating the live-line work equipment in the same plane with a steel rope, the holes of the lower flange of the live-line work equipment and the holes of the upper flange of the wellhead can be aligned, thereby inserting part of the screw rod, and then lowering the live-line work equipment, placing the load of the live-line work equipment on the wellhead flange, and connecting the remaining screw rod to complete the installation of the live-line work equipment. This avoids the problem of needing to adjust the position deviation multiple times in the traditional manual method, reduces the human error in the operator's guidance and docking process and the safety hazards of manually straightening the flange, and greatly improves the accuracy and efficiency of flange docking.

[0027] 2. The flange guide for installing pressurized equipment provided by this utility model has a first joint with an outer diameter larger than the outer diameter of the lead pipe. This design allows for easy lifting of the lead pipe using a crane through the first joint, thus improving the ease of use of the flange guide.

[0028] 3. The flange guide for installing pressurized equipment provided by this utility model has detachable components such as the guide pipe, first connector, second connector, central pipe, guide cone, and lock nut. The overall structure is simple and modular, which facilitates quick assembly and disassembly. It can flexibly replace the guide cone of the matching size according to different flange sizes, and has a wide range of applications. The cylindrical part of the guide cone abuts against the second connector, and the conical part abuts against the lock nut, which effectively reduces the secondary adjustment caused by the shaking of the guide cone, reduces the operation time, and improves the reliability of docking. Attached Figure Description

[0029] Figure 1 A cross-sectional view of a flange guide used for installing live work equipment;

[0030] Figure 2 This is a cross-sectional view of the second connector;

[0031] Figure 3 Left view of the second connector;

[0032] Figure 4 This is a sectional view of the cone.

[0033] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0034] Figure 6 This is the left view of the central tube.

[0035] Marked in the image:

[0036] 1-Inlet tube, 11-First connector, 12-Second connector, 121-Inlet tube connection, 122-Central tube connection, 123-Protrusion, 2-Central tube, 3-Inlet cone, 31-Columnar part, 32-Conical part, 4-Locking nut, 5-Washer. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0038] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0039] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0040] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0041] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0042] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0043] Example 1

[0044] Because the main body of the live-line working machine is relatively heavy (approximately 10t~20t), it is difficult to connect the flange of the live-line working machine to the wellhead flange when it is necessary to do so. Therefore, this embodiment provides a flange guide for the installation of live-line working machines, such as... Figure 1 As shown, the system includes a lead pipe 1, which can be a hydraulic hose at the construction site. One end of the lead pipe 1 is detachably connected to a first connector 11. Specifically, the first connector 11 can be threaded onto the lead pipe 1. The outer diameter of the first connector 11 is larger than that of the lead pipe 1, specifically 6-10 cm larger. This arrangement allows for the use of a lifting device to hold the first connector 11 during on-site operations, providing a larger connection area for the lifting device and enabling it to grip the first connector 11 more securely, reducing the risk of loosening or slippage during lifting. The lifting device then lifts the lead pipe 1 so that it passes through the flange of the pressurized equipment.

[0045] The other end of the lead tube 1 is detachably connected to the second connector 12. Specifically, the second connector 12 can be threaded into the lead tube 1. The side of the second connector 12 facing away from the lead tube 1 (e.g.) Figure 1 The center tube 2 is detachably connected to the right side of the second connector 12 shown. Specifically, the center tube 2 can be threaded to the second connector 12. The center tube 2 is coaxially arranged with the lead tube 1. The outer wall of the center tube 2 is fitted with a lead cone 3 and a locking nut 4. Specifically, the lead cone 3 can be interference-fitted to the center tube 2, and the locking nut 4 can be threaded to the center tube 2.

[0046] like Figure 4 As shown, the guide cone 3 includes a cylindrical portion 31 and a conical portion 32 connected to the cylindrical portion 31. Figure 4 For example, the column part 31 can be a hollow cylindrical structure (e.g., it can be...). Figure 4 The portion to the left of the dashed line), the cone portion 32 can be an internally hollow cone structure or a frustum structure (e.g., it could be...). Figure 4 The portion to the right of the dashed line), the tip of the cone portion 32 (if it is a cone structure) or the upper base (if it is a frustum structure) faces away from the column portion 31 (for example, it could be...). Figure 4 (Right side). It is foreseeable that the column part 31 and the cone part 32 are one way of dividing the structure of the guide cone 3, and do not mean that the guide cone 3 must be a split structure, that is, the guide cone 3 can also be a one-piece molded structure.

[0047] The cylindrical portion 31 abuts against the second connector 12, and the conical portion 32 abuts against the locking nut 4. Figure 1For example, when installing the guide cone 3, the center tube 2 can be threaded to the second connector 12 first, and then the guide cone 3 can be interference-fitted to the outer wall of the center tube 2 until the column part 31 abuts against the second connector 12. Then, the locking nut 4 can be threaded to the end of the center tube 12 away from the second connector 12 until the cone part 32 abuts against the locking nut 4.

[0048] Furthermore, such as Figure 1 As shown, a washer 5 can also be provided between the conical part 32 and the locking nut 4. The washer 5 can prevent the conical part 32 from directly contacting the locking nut 4, thereby preventing wear or damage caused by direct friction during use, extending the service life of the conical part 32 and the locking nut 4, and reducing the maintenance and replacement costs of the equipment. In the complex environment of the well site, the locking nut 4 may experience loosening of its threads. The washer 5 can slow down the loosening tendency of the locking nut 4 by providing additional contact and friction, and maintain the stability of the device.

[0049] The flange guide provided in this embodiment for installing live-line working equipment has an outer diameter of the first connector 11 larger than that of the lead pipe 1. This design allows for convenient lifting of the lead pipe 1 using a crane via the first connector 11. During use, the flange guide is inserted into the center of the live-line working equipment and gradually lowered until a portion of the cylindrical part 31 of the guide cone 3 protrudes from the lower flange of the live-line working equipment. The lead pipe 1 is then secured using the fixing slips of the live-line working equipment. The entire live-line working equipment is then lifted, allowing the conical part 32 of the guide cone 3 to be accurately and quickly inserted into the wellhead flange for pre-positioning. The cylindrical part 31 of the guide cone 3 is gradually guided into the wellhead flange, achieving coaxial positioning between the lower flange of the live-line working equipment and the upper flange of the wellhead. The live-line working equipment is then rotated in the same plane using a steel cable to align the holes of the lower flange of the live-line working equipment with those of the upper flange of the wellhead, allowing for the insertion of a portion of the bolts. The live-line working equipment is then lowered, its load resting on the wellhead flange. The remaining bolts are then connected to complete the installation of the live-line working equipment. This design avoids the need for multiple adjustments to positional deviations required in traditional manual methods, reducing human error during the docking process and the safety hazards associated with manually straightening the flange, thus significantly improving the accuracy and efficiency of flange docking. Furthermore, the diameter of the column portion 31 can be matched to the flange's inner diameter, further enhancing the self-centering capability of the guide cone 3. Even in severe weather conditions such as strong winds, the guiding action of the guide pipe 1 and guide cone 3 ensures accurate flange docking, improving the environmental adaptability of this flange guide. Components such as the guide pipe 1, first connector 11, second connector 12, center pipe 2, guide cone 3, and locking nut 4 are all detachable, featuring a simple, modular design that facilitates quick assembly and disassembly. The guide cone 3 can be flexibly replaced with matching sizes to accommodate different flange dimensions, making it widely applicable. The column portion 31 of the guide cone 3 abuts against the second connector 12, and the cone portion 32 abuts against the locking nut 4, effectively reducing secondary adjustments caused by guide cone 3 wobbling, lowering operation time, and improving docking reliability.

[0050] Example 2

[0051] Based on Example 1, this example describes the specific structure of the second connector 12, such as... Figure 2 , Figure 3As shown, in this embodiment, the second connector 12 includes a lead pipe connection portion 121 that opens towards the lead pipe 1 and a central pipe connection portion 122 that protrudes towards the central pipe 2. The internal thread of the lead pipe connection portion 121 matches the external thread of the outer wall of the lead pipe 1, so that the lead pipe connection portion 121 is threadedly connected to the outer wall of the lead pipe 1. The external thread of the central pipe connection portion 122 matches the internal thread of the central pipe 2, so that the central pipe connection portion 122 is threadedly connected to the inner wall of the central pipe 2. By setting the threaded connection method, the lead pipe connection portion 121 and the lead pipe 1, and the central pipe connection portion 122 and the central pipe 2 can be easily assembled or disassembled. This modular design facilitates the maintenance and replacement of the equipment. When partial damage occurs, it is not necessary to replace the entire device; only the damaged parts need to be replaced, thus reducing maintenance costs and time.

[0052] like Figure 2 As shown, there is a protrusion 123 between the lead tube connection 121 and the central tube connection 122. The outer diameter of the protrusion 123 is larger than the outer diameter of the lead tube connection 121 and the central tube connection 122, so that the column part 31 can abut against the protrusion 123.

[0053] The protrusion 123 provides a clear positioning reference for the column 31. When the column 31 abuts against the protrusion 123, it can effectively restrict the axial movement of the column 31, ensure the coaxiality between the column 31 and the second joint 12, improve the alignment accuracy of the overall device, facilitate the smooth flange docking process, and avoid increased docking difficulty due to component misalignment.

[0054] To facilitate the connection between the second connector 12 and the lead tube 1, the protrusion 123 can also be configured as a regular polygon structure, for example... Figure 3 As shown, Figure 3 The protrusion 123 is configured as a regular hexagonal structure. Setting the protrusion 123 as a regular polygonal structure, such as a regular quadrilateral or a regular hexagon, can better integrate with special tools (such as pipe wrenches) and facilitate the installation, adjustment or disassembly of the equipment. The polygonal protrusion design allows the tool to grip the protrusion 123 more firmly, reducing the difficulty of operation and safety risks caused by slippage.

[0055] Furthermore, such as Figure 1 , Figure 2 As shown, the second connector 12 can seal at least one end of the lead pipe 1. Specifically, for example, the protrusion 123 can be made into a solid structural component to prevent foreign objects from falling from the lead pipe 1 into the wellhead during flange alignment.

[0056] It is foreseeable that in this embodiment, the lead tube connection part 121, the protrusion part 123, and the central tube connection part 122 are only one way of dividing the structure of the second connector 12, and do not mean that the second connector 12 must be a split structure, that is, the second connector 12 can also be an integrally formed structure.

[0057] Example 3

[0058] Based on Example 2, this example describes the specific structure of the central tube 2 and the guide cone 3. For example... Figure 4 , Figure 5 As shown, in this embodiment, the transition section from the cylindrical part 31 to the conical part 32 can be a rounded chamfer structure. The rounded chamfer design makes the transition section smoother, which can better guide the flange of the pressurized operation equipment to move along the cylindrical part 31 to the conical part 32, and then dock with the wellhead flange.

[0059] Furthermore, such as Figure 1 , Figure 6 As shown, the outer wall of the end where the central tube 2 connects to the central tube connecting part 122 is a regular polygonal structure, for example... Figure 6 The illustration shows a case where the outer wall of the end where the central tube 2 connects to the central tube connector 122 is a regular hexagonal structure. Setting the outer wall of the end where the central tube 2 connects to the central tube connector 122 to a regular polygonal structure, such as a regular quadrilateral or a regular hexagon, allows for better integration with special tools (such as pipe wrenches), facilitating the connection between the central tube 2 and the central tube connector 122, and providing convenience for the installation, adjustment, or disassembly of the equipment.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flange guide for installing live-line work equipment, characterized in that, Includes a lead tube (1), one end of which is detachably connected to a first connector (11), and the other end of which is detachably connected to a second connector (12). The outer diameter of the first connector (11) is larger than the outer diameter of the lead tube (1). The side of the second connector (12) facing away from the lead tube (1) is detachably connected to a central tube (2). The central tube (2) is coaxially arranged with the lead tube (1). The outer wall of the central tube (2) is fitted with a guide cone (3) and a locking nut (4). The guide cone (3) includes a column part (31) and a cone part (32) connected to the column part (31). The column part (31) abuts against the second connector (12), and the cone part (32) abuts against the locking nut (4).

2. A flange guide for installing pressurized equipment according to claim 1, characterized in that, The outer diameter of the first connector (11) is 6-10 cm larger than the outer diameter of the lead tube (1).

3. A flange guide for installing pressurized equipment according to claim 1, characterized in that, The second connector (12) includes a lead tube connection part (121) and a central tube connection part (122). The lead tube connection part (121) is threaded to the outer wall of the lead tube (1), and the central tube connection part (122) is threaded to the inner wall of the central tube (2).

4. A flange guide for installing pressurized equipment according to claim 3, characterized in that, The second connector (12) also includes a protrusion (123) located between the lead tube connection (121) and the central tube connection (122), and the column part (31) abuts against the protrusion (123).

5. A flange guide for installing pressurized equipment according to claim 4, characterized in that, The protrusion (123) is a regular polygonal structure.

6. A flange guide for installing pressurized equipment according to claim 4, characterized in that, The second connector (12) is capable of sealing at least one end of the lead tube (1).

7. A flange guide for installing pressurized equipment according to claim 3, characterized in that, The outer wall of the end where the central tube (2) is connected to the central tube connecting part (122) is a regular polygonal structure.

8. A flange guide for installing pressurized equipment according to claim 1, characterized in that, The transition section from the columnar part (31) to the conical part (32) has a rounded chamfer structure.

9. A flange guide for installing live-line work equipment according to claim 1, characterized in that, It also includes a gasket (5) located between the cone portion (32) and the locking nut (4).

10. A flange guide for installing live-line work equipment according to any one of claims 1-9, characterized in that, The first connector (11) and the second connector (12) are threaded to the lead tube (1), the second connector (12) is threaded to the center tube (2), the lead cone (3) is interference-fitted to the center tube (2), and the center tube (2) is threaded to the lock nut (4).

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