A flange docking centering guide device

Abstract

This utility model relates to the field of flange connection technology and discloses a flange docking centering guide device for assisting the connecting bolts in inserting into the bolt holes on the flange. The guide device includes a guide head and a protective sleeve. One end of the protective sleeve is open, and the other end is fixedly connected to the guide head. The tip of the guide head extends away from the protective sleeve. The maximum diameter of the guide head is equal to the outer diameter of the protective sleeve. The inner diameter of the protective sleeve is larger than the outer diameter of the connecting bolt, and the outer diameter of the protective sleeve is smaller than the inner diameter of the bolt hole. The protective sleeve can be fitted onto the end of the connecting bolt and completely cover the threads on the connecting bolt. The guide device in this utility model can be directly fitted onto and temporarily fixed to the end of the bolt. During the alignment of two flanges, the guide device acts as a guide rod to extend into the bolt hole, which not only provides better guidance and makes the alignment operation faster and more accurate, but more importantly, protects the bolt from any damage and eliminates potential safety hazards.

Description

Technical Field

[0001] This utility model relates to the field of flange connection technology, and in particular to a flange docking centering guide device. Background Technology

[0002] In oilfield downhole operations, such as fracturing, well testing, and well workover, rapid and reliable connection of equipment manifolds (e.g., choke manifolds, fracturing manifolds, venting lines, etc.) is crucial. Flange connections are a widely used and reliable pipeline connection structure. Therefore, oilfield manifolds are typically connected using weld neck flanges or blind flanges, with a high-pressure seal achieved by bolting between the two flanges.

[0003] As attached Figure 1-2 The flange connection structure shown requires that, during the mating of flanges 1, each bolt hole 11 on both flanges 1 must be precisely aligned before the connecting bolts 2 can be smoothly inserted. Although some equipment exists for positioning and mating flanges 1, oilfield construction sites are generally outdoor environments or even downhole spaces, making it impossible for specialized equipment to operate in conditions of limited space, muddy environments, and loose, unstable ground. Therefore, in such field environments, the alignment of flanges 1 still mainly relies on manual experience, using pry bars, sledgehammers, or inserting the connecting bolts 2 as guide rods into the bolt holes 11 on the flanges 1 to forcibly align the two flanges 1.

[0004] This operating method is not only inefficient and labor-intensive, but more importantly, it easily damages the threads on the connecting bolt 2. Damaged connecting bolt 2 may strip or break under high pressure, leading to serious safety accidents. Therefore, a special tool needs to be designed that is simple, convenient, suitable for complex environments, can assist in aligning the flange bolt holes 11, and can effectively protect the threads on the connecting bolt 2. Utility Model Content

[0005] To address the problem in existing technologies where there is a lack of tools to assist in aligning bolt holes when connecting flanges at oilfield construction sites, the purpose of this utility model is to provide a flange docking centering guide device that can be directly fitted and temporarily fixed to the end of the bolt. During the alignment of two flanges, this guide device acts as a guide rod to extend into the bolt hole, which not only provides better guidance and makes the alignment operation faster and more accurate, but more importantly, protects the bolt from any damage and eliminates potential safety hazards.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A flange docking centering guide device is provided to assist connecting bolts in passing through bolt holes on a flange. The guide device includes a guide head and a protective sleeve. One end of the protective sleeve is open, and the other end is fixedly connected to the guide head. The tip of the guide head extends away from the protective sleeve. The maximum diameter of the guide head is equal to the outer diameter of the protective sleeve. The inner diameter of the protective sleeve is larger than the outer diameter of the connecting bolt, and the outer diameter of the protective sleeve is smaller than the inner diameter of the bolt hole. The protective sleeve can be fitted onto the end of the connecting bolt and completely cover the threads on the connecting bolt.

[0007] The present invention is further configured such that: the guide head is conical in shape and the tip of the guide head is located on the axis of the protective cylinder.

[0008] The present invention is further configured such that the guide head and the protective cylinder are integrated into one unit.

[0009] The present invention is further configured such that: the guiding device further includes a connecting structure, the connecting structure being used to fix the guiding device to the end of the connecting bolt.

[0010] The present invention is further configured such that: the connecting structure is a threaded section disposed on the inner wall of the protective cylinder and capable of threaded engagement with the connecting bolt, and the protective cylinder is screwed onto the connecting bolt through the connecting structure.

[0011] The present invention is further configured such that the threaded section is located inside the protective cylinder at one end near the guide head.

[0012] The present invention is further configured such that: the connecting structure is a magnetic block disposed inside the protective cylinder, and the guiding device is attracted to the connecting bolt by the magnetic block.

[0013] The present invention is further configured such that the magnetic block is fixed inside the protective cylinder at one end near the guide head.

[0014] In summary, the beneficial effects achieved by this utility model are as follows: (1) When connecting two flanges, the protective sleeve can be placed at the end of the connecting bolt. At this time, the conical guide head guides the combination of the connecting bolt and the guide device into the bolt hole on the flange, which has a better guiding effect and higher docking efficiency. (2) During the flange docking process, the protective sleeve always completely covers the threads on the connecting bolts, effectively preventing the threads on the connecting bolts from being damaged during the docking process; (3) A magnetic block is installed inside the protective cylinder. The magnetic block can attract the connecting bolts to achieve a stable connection between the guide device and the connecting bolts and to facilitate quick assembly and disassembly, thus avoiding the steps of assembling and disassembling the guide device from affecting the docking efficiency on site. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the structure of the flange after it has been connected in the background art of this utility model; Figure 2 This is a schematic diagram of the flange connection structure in the background art of this utility model; Figure 3 This is a schematic diagram of the flange docking centering guide device in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram showing the installation position of the guide device on the connecting bolt in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the guide device in Embodiment 1 of this utility model when docking with the flange; Figure 6 This is a schematic diagram of the flange docking centering guide device in Embodiment 2 of this utility model.

[0017] In the diagram: 1. Flange; 11. Bolt hole; 2. Connecting bolt; 21. Nut; 3. Guide device; 31. Guide head; 32. Protective cylinder; 33. Magnetic block; 34. Threaded section. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0019] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Example 1

[0021] As attached Figure 3-5 As shown, a flange docking centering guide device includes a guide head 31, a protective cylinder 32, and a magnetic block 33.

[0022] The guide device 3 assists the connecting bolts 2 in passing through the bolt holes 11 on the flange 1. Specifically, both the flange 1 and the connecting bolts 2 are common structures in the prior art. Several bolt holes 11 are evenly distributed around the center on the flange 1, and the inner diameter of the bolt holes 11 is larger than the outer diameter of the connecting bolts 2. When all the bolt holes 11 on the two flanges 1 are aligned, the bolt shank of the connecting bolt 2 passes through the bolt holes 11, and the nuts 21 are screwed on both ends of the bolt shank to complete the connection and fixation of the two flanges 1.

[0023] The protective cylinder 32 is a cylindrical structure with an opening at one end and a guide head 31 at the other end.

[0024] The guide head 31 has a conical structure with its tip extending away from the protective cylinder 32, and the tip of the guide head 31 is located on the axis of the protective cylinder 32.

[0025] The maximum diameter of the guide head 31 is equal to the outer diameter of the protective cylinder 32. In this embodiment, the guide head 31 and the protective cylinder 32 are integrally formed, so the side wall of the guide head 31 and the outer side wall of the protective cylinder 32 are continuous smooth surfaces. After the tip of the guide head 31 enters the bolt hole 11, the entire guide head 31 and the protective cylinder 32 can then enter the bolt hole 11.

[0026] The inner diameter of the protective sleeve 32 is slightly larger than the outer diameter of the connecting bolt 2, so that the protective sleeve 32 can be fitted onto the end of the connecting bolt 2. Furthermore, the outer diameter of the protective sleeve 32 is slightly smaller than the inner diameter of the bolt hole 11, so that the protective sleeve 32 can pass through the bolt hole 11.

[0027] The length of the protective sleeve 32 is greater than the length of the threaded end of the connecting bolt 2. Therefore, after the protective sleeve 32 is fitted onto the end of the connecting bolt 2, the protective sleeve 32 can completely cover the thread on the connecting bolt 2, preventing the thread from being damaged.

[0028] The guide device 3 is also provided with a connecting structure, which is used to fix the guide device 3 to the end of the connecting bolt 2 to prevent the guide device 3 from falling off the connecting bolt 2 during the flange 1 docking process.

[0029] In this embodiment, the connecting structure is a magnetic block 33 disposed inside the protective cylinder 32.

[0030] The magnetic block 33 is a cylindrical block structure, fixed inside the protective cylinder 32 near one end of the guide head 31. When the guide device 3 is fitted onto the connecting bolt 2, the end of the connecting bolt 2 near the magnetic block 33 is attracted by magnetic force, thus the entire guide device 3 is attracted to the connecting bolt 2 by the magnetic block 33. After the flange is connected, the guide device 3 can be directly pulled off the connecting bolt 2 to complete the separation.

[0031] The implementation principle of the above embodiments is as follows: When using this flange docking centering guide device to dock flange 1, first, select two connecting bolts 2, screw nuts 21 onto one end, and insert them into the corresponding bolt holes 11 on flange 1. Then, attach the two guide devices 3 to the ends of the two connecting bolts 2 using magnetic attraction. Slowly bring the two flanges 1 closer together, using the guide head 31 to guide the two connecting bolts 2 into their corresponding bolt holes 11. Next, insert all remaining connecting bolts 2 into the remaining bolt holes 11. Finally, remove the guide devices 3 and screw nuts 21 onto all connecting bolts 2 and tighten them.

[0032] Example 2

[0033] As attached Figure 6 As shown, this utility model discloses a flange docking centering guide device. Unlike the first embodiment, the connection structure is a threaded section 34 that is set on the inner wall of the protective cylinder 32 and can be threaded with the connecting bolt 2.

[0034] The threaded section 34 is located inside the protective sleeve 32 near the end of the guide head 31, and the length of the threaded section 34 is very short. After the guide device 3 is fitted onto the connecting bolt 2, the end of the connecting bolt 2 is close to the threaded section 34 and can be threadedly connected to the threaded section 34 by simple screwing, so that the entire guide device 3 is fixed to the connecting bolt 2 by the threaded section 34.

[0035] After the flange 1 is connected, the guide device 3 can be removed by simply turning it in the opposite direction. The length of the threaded section 34 only needs to be sufficient to fix the guide device 3 to the connecting bolt 2. Under this premise, the shorter the threaded section 34, the higher the efficiency of disassembling and assembling the guide device 3.

[0036] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A flange butt centering guide device for assisting the insertion of a connecting bolt (2) into a bolt hole (11) of a flange plate (1), characterized in that The guiding device (3) includes a guide head (31) and a protective cylinder (32). One end of the protective cylinder (32) is open and the other end is fixedly connected to the guide head (31). The tip of the guide head (31) extends away from the protective cylinder (32). The maximum diameter of the guide head (31) is equal to the outer diameter of the protective cylinder (32). The inner diameter of the protective cylinder (32) is greater than the outer diameter of the connecting bolt (2) and the outer diameter of the protective cylinder (32) is smaller than the inner diameter of the bolt hole (11). The protective cylinder (32) can be sleeved on the end of the connecting bolt (2) and completely cover the threads on the connecting bolt (2).

2. The flange butt centering guide of claim 1, wherein, The guide head (31) is conical in shape and the tip of the guide head (31) is located on the axis of the protective cylinder (32).

3. A flange butt centring guide according to claim 1 or 2, characterised in that, The guide head (31) and the protective cylinder (32) are integrated.

4. The flange butt centering guide of claim 1 wherein, The guide device (3) further includes a connecting structure for fixing the guide device (3) to the end of the connecting bolt (2).

5. The flange butt centering guide of claim 4, wherein, The connecting structure is a threaded section (34) set on the inner wall of the protective cylinder (32) and capable of threaded engagement with the connecting bolt (2). The protective cylinder (32) is screwed onto the connecting bolt (2) through the connecting structure.

6. The flange docking centering guide device according to claim 5, characterized in that, The threaded section (34) is located inside the protective cylinder (32) at one end near the guide head (31).

7. The flange butt centering guide of claim 4 wherein, The connection structure is a magnetic block (33) set inside the protective cylinder (32), and the guide device (3) is attached to the connecting bolt (2) by the magnetic block (33).

8. The flange butt centering guide of claim 7, wherein, The magnetic block (33) is fixed inside the protective cylinder (32) at one end near the guide head (31).

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