An internal bracing positioning device for a pipe

Abstract

The application provides an inner support type positioning device for a pipe joint, which comprises a folding and unfolding driving element, a first inner support frame and a second inner support frame. The first inner support frame has a plurality of annularly distributed first support arms, each of which is connected to the folding and unfolding driving element through a first folding and unfolding arm. The folding and unfolding driving element can drive the first folding and unfolding arm to fold and unfold along the radial direction of the first inner support frame. The second inner support frame has a plurality of annularly distributed second support arms, each of which is connected to the folding and unfolding driving element through a second folding and unfolding arm. The folding and unfolding driving element can drive the second folding and unfolding arm to fold and unfold along the radial direction of the second inner support frame. The first inner support frame and the second inner support frame are coaxially arranged. The application solves the problem that the traditional external support frame hinders welding or bolt installation through the built-in and independently adjustable double support structure, significantly improves the butt coaxiality and positioning stability, and overcomes the defects of low precision and easy damage to the pipe wall caused by artificial support or temporary spot welding.

Description

Technical Field

[0001] This invention relates to the field of pipeline construction technology, and in particular to an internal support positioning device for pipe connection. Background Technology

[0002] During pipeline installation, the coaxiality and stability of pipeline connections directly affect the connection quality (such as weld sealing and flange fit). Traditional pipeline positioning often relies on external supports, temporary spot welding, or manual support. These methods generally have significant drawbacks: external supports require repeated adjustments, occupy a large space, and are located outside the pipeline, easily interfering with welding and connection operations and affecting the continuity of construction; temporary spot welding, while providing some fixation, can cause thermal or structural damage to the pipeline wall, failing to meet the requirements of precise construction; and manual support is limited by the operator's physical strength and judgment, easily leading to pipeline displacement during support, resulting in low connection accuracy and poor stability, making it difficult to meet the high standards of pipeline installation quality control. Summary of the Invention

[0003] The purpose of this invention is to provide an internal support positioning device for pipe assembly, thereby addressing the shortcomings in the aforementioned background technology.

[0004] The technical solution of the present invention is: an internal support positioning device for a pipe fitting, comprising:

[0005] Retraction and expansion drive components;

[0006] The first inner support frame has a plurality of first support arms that are distributed in a ring. Each first support arm is connected to the retraction drive unit through a first retraction arm. The retraction drive unit can drive the first retraction arm to retract and extend along the radial direction of the first inner support frame.

[0007] The second inner support frame has a plurality of second support arms that are distributed in a ring. Each second support arm is connected to the retraction drive member through a second retraction arm. The retraction drive member can drive the second retraction arm to retract and extend along the radial direction of the second inner support frame.

[0008] The first inner support frame and the second inner support frame are coaxially configured.

[0009] Furthermore, the retraction / extension drive includes an end seat, a first sleeve, a second sleeve, and a screw. The first sleeve is located between the end seat and the second sleeve. One end of the screw is rotatably connected to the end seat. The first sleeve and the second sleeve are respectively sleeved on the screw and are in transmission cooperation with it. The first retraction / extension arm is movably connected to the first support arm, the first sleeve, and the end seat. The second retraction / extension arm is movably connected to the second support arm, the first sleeve, and the second sleeve.

[0010] Furthermore, the first retractable arm includes a first connecting rod and a second connecting rod that are cross-hinged. The first support arm is provided with a first straight slot extending axially along the first inner support frame. The two ends of the first connecting rod are respectively rotatably connected to the first support arm and the end seat. One end of the second connecting rod is movably connected to the first straight slot, and the other end is rotatably connected to the first sleeve.

[0011] Furthermore, the second extension arm includes a third link and a fourth link that are cross-hinged. The second support arm is provided with a second straight slot that extends axially along the second inner support frame. The two ends of the third link are rotatably connected to the second support arm and the second sleeve, respectively. One end of the fourth link is movably connected to the second straight slot, and the other end is rotatably connected to the first sleeve.

[0012] Furthermore, the second sleeve includes a coaxially configured sliding cylinder portion and an inner threaded cylinder portion. The sliding cylinder portion is slidably sleeved on the screw, and its two axial ends are respectively rotatably connected to the second retracting arm and the inner threaded cylinder portion. The rotation axis of the second retracting arm is perpendicular to the rotation axis of the inner threaded cylinder portion, and the inner threaded cylinder portion is sleeved on the screw and threadedly connected to it.

[0013] Furthermore, a handle is provided at the end of the screw away from the end seat.

[0014] Furthermore, the end of the second sleeve away from the end seat is provided with an anti-slip sleeve.

[0015] Furthermore, the screw and the end seat are connected by a first bearing, and the slide section and the inner threaded section are connected by a second bearing.

[0016] The beneficial effects of this invention include: the built-in, independently adjustable double-support structure avoids interference and occupation of the circumferential working space of the pipeline by external positioning fixtures, solving the problem of traditional external supports hindering welding or bolt installation; at the same time, this device provides symmetrical and stable support from inside the pipeline, significantly improving the coaxiality of the connection and the positioning stability, overcoming the defects of low precision and easy damage to the pipe wall caused by manual support or temporary spot welding; in addition, the retractable design of this device not only facilitates quick assembly and disassembly, but also adapts to different pipe diameters within a certain range, improving the flexibility, efficiency and overall quality control of construction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of pipe welding using an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a pipe flange connection using an embodiment of the present invention;

[0019] Figure 3 This is a right view of an embodiment of the present invention;

[0020] Figure 4 This is a left view of an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the connection between the screw and the end seat in an embodiment of the present invention;

[0022] Figure 6 This is a cross-sectional view of the second sleeve in an embodiment of the present invention.

[0023] In the picture:

[0024] 1. Retraction / Extension Drive Component; 11. End Seat; 12. First Sleeve; 13. Second Sleeve; 131. Sliding Cylinder Section; 132. Inner Threaded Sleeve Section; 14. Screw; 15. Handle; 16. Anti-slip Sleeve; 17. First Bearing; 18. Second Bearing;

[0025] 2. First inner support frame; 21. First support arm; 211. First straight slot; 22. First extension / retraction arm; 221. First connecting rod; 222. Second connecting rod;

[0026] 3. Second inner support frame; 31. Second support arm; 311. Second straight slot; 32. Second extension / retraction arm; 321. Third connecting rod; 322. Fourth connecting rod;

[0027] 4. Connecting ear. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] In the description of the embodiments of this invention, it should be understood that the terms "top," "bottom," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "set" and "connected" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0030] Reference Appendix Figure 1-6This invention provides an internal support positioning device for pipe assembly, comprising a retraction drive 1, a first internal support frame 2, and a second internal support frame 3. The first internal support frame 2 and the second internal support frame 3 are coaxially configured. The first internal support frame 2 has a plurality of first support arms 21 arranged in a ring, and each first support arm 21 is connected to the retraction drive 1 via a first retraction arm 22. The number of first retraction arms 22 and the first support arms 21 are the same and their positions correspond. The retraction drive 1 can drive the first retraction arms 22 to retract and expand radially along the first internal support frame 2. The second internal support frame 3 has a plurality of second support arms 31 arranged in a ring, and each second support arm 31 is connected to the retraction drive 1 via a second retraction arm 32. The number of second retraction arms 32 and the second support arms 31 are the same and their positions correspond. The retraction drive 1 can drive the second retraction arms 32 to retract and expand radially along the second internal support frame 3.

[0031] In use, firstly, the first retractable arm 22 and the second retractable arm 32 are retracted using the retractable drive 1, reducing the overall radial dimension of the device. The device is then inserted axially into the pipe to be connected, with the first inner support 2 and the second inner support 3 positioned in different pipes. Next, the first retractable arm 22 and the second retractable arm 32 are extended using the retractable drive 1, so that the first support arm 21 and the second support arm 31 fit tightly against the inner walls of the two pipe sections, thereby achieving synchronous internal support and centering positioning of the two pipe sections. After the pipes are connected and fixed, the first retractable arm 22 and the second retractable arm 32 are retracted again using the retractable drive 1, reducing the overall radial dimension of the device. The device can then be removed axially from the pipe.

[0032] This invention, through its built-in, independently adjustable double-support structure, avoids interference and occupation of the circumferential working space of the pipeline by external positioning fixtures, solving the problem of traditional external supports hindering welding or bolt installation. At the same time, this device provides symmetrical and stable support from inside the pipeline, significantly improving the coaxiality of the connection and the stability of the positioning, overcoming the defects of low precision and easy damage to the pipe wall caused by manual support or temporary spot welding. In addition, the retractable design of this device not only facilitates quick assembly and disassembly, but also adapts to different pipe diameters within a certain range, improving the flexibility, efficiency and overall quality control of construction.

[0033] To ensure the uniformity of support and overall stability of the device, at least three sets of the first support arm 21, the first extension arm 22, the second support arm 31, and the second extension arm 32 are provided in this embodiment, and are evenly distributed along the circumference. This multi-point symmetrical support layout can ensure that the device forms a balanced circumferential contact force with the inner wall of the pipe when it is opened, effectively preventing the pipe from deviating or twisting during the docking process, further improving the alignment accuracy and operational reliability. In addition, the synergistic effect of multiple sets of support arms also enhances the structural rigidity, enabling it to maintain a stable positioning state when subjected to external loads or the self-weight of the pipe, which is especially suitable for construction docking scenarios of large-diameter or long-distance pipes.

[0034] Reference Appendix Figure 1 The retraction drive component 1 includes an end seat 11, a first sleeve 12, a second sleeve 13, a screw 14, and a handle 15. The first sleeve 12 is located between the end seat 11 and the second sleeve 13. One end of the screw 14 is rotatably connected to the end seat 11, and the other end is fixedly connected to the handle 15. The first sleeve 12 and the second sleeve 13 are respectively sleeved on the screw 14 and are in transmission cooperation with it. The transmission cooperation includes, but is not limited to, threaded connection. The first retraction arm 22 is movably connected to the first support arm 21, the first sleeve 12, and the end seat 11. The second retraction arm 32 is movably connected to the second support arm 31, the first sleeve 12, and the second sleeve 13.

[0035] More specifically, the first retractable arm 22 includes a first connecting rod 221 and a second connecting rod 222 that are cross-hinged. The first support arm 21 is provided with a first straight slot 211 that extends axially along the first inner support frame 2. The first straight slot 211 is located on the side of the first support arm 21 near the end seat 11. The two ends of the first connecting rod 221 are rotatably connected to the first support arm 21 and the end seat 11, respectively. One end of the second connecting rod 222 is movably connected to the first straight slot 211, and the other end is rotatably connected to the first sleeve 12. The second retractable arm 32 includes a third connecting rod 321 and a fourth connecting rod 322 that are cross-hinged. The second support arm 31 is provided with a second straight slot 311 that extends axially along the second inner support frame 3. The second straight slot 311 is located on the side of the second support arm 31 near the second sleeve 13. The two ends of the third connecting rod 321 are rotatably connected to the second support arm 31 and the second sleeve 13, respectively. One end of the fourth connecting rod 322 is movably connected to the second straight slot 311, and the other end is rotatably connected to the first sleeve 12.

[0036] In use, firstly, the first retractable arm 22 and the second retractable arm 32 are retracted, and the device is inserted axially into the first section of the pipe. Then, the second sleeve 13 is held and fixed, while the screw 14 is rotated by rotating the handle 15. Because the second retractable arm 32 has a certain rigidity, and based on the above structural configuration, the second retractable arm 32 cannot rotate around the axis of the screw 14. Therefore, when the second sleeve 13 is held and fixed, even if the screw 14 rotates, it will not cause the first sleeve 12 to rotate. That is, at this time, the relative positions of the first sleeve 12 and the second sleeve 13 are fixed, while the screw 14 rotates and undergoes axial displacement, causing the end seat 11 to undergo axial displacement, so that the end seat 11 gradually moves closer to the first sleeve 12, and the distance between the end seat 11 and the first sleeve 12 decreases. This causes the first connecting rod 221 and the second connecting rod 222 to rotate relative to each other. At the same time, the end of the second connecting rod 222 slides along the first straight groove 211, causing the first retractable arm 22 to gradually unfold and push the first support arm 21 radially away from the screw 14 until it is in close contact with the inner wall of the first section of pipe. Then, the second section of pipe is fitted over the device. By holding and fixing the handle 15 and the screw 14, the second sleeve 13 is rotated to move along the screw 14 axially toward the first sleeve 12, thereby causing the third connecting rod 321 and the fourth connecting rod 322 to rotate relative to each other. At the same time, the end of the fourth connecting rod 322 slides along the second straight groove 311, causing the second retractable arm 32 to gradually unfold and push the second support arm 31 radially away from the screw 14 until it is in close contact with the inner wall of the second section of pipe.

[0037] To ensure the effective implementation of the extension operation of the second inner support frame 3, in this embodiment, the second sleeve 13 includes a coaxially configured sliding cylinder part 131 and an inner threaded cylinder part 132. The sliding cylinder part 131 is slidably sleeved on the screw 14, and its two axial ends are respectively rotatably connected to the third connecting rod 321 and the inner threaded cylinder part 132. The rotation axis of the third connecting rod 321 is perpendicular to the rotation axis of the inner threaded cylinder part 132. The inner threaded cylinder part 132 is sleeved on the screw 14 and threadedly connected to it. When the first retractable arm 22 needs to be extended, the entire assembly of the fixed sliding cylinder 131 and the inner threaded cylinder 132 should be held to prevent the first sleeve 12 from rotating under the drive of the screw 14. When the second retractable arm 32 needs to be extended, the inner threaded cylinder 132 should be rotated so that it pushes the sliding cylinder 131 to move axially along the screw 14. During this process, since the first support arm 21 is tightly against the inner wall of the first section of the pipe, the first support arm 21 will no longer rotate around the axis of the screw 14. The first retractable arm 22 has a certain rigidity, and based on the above... The structure is configured such that the first retractable arm 22 will not rotate around the axis of the screw 14, and thus the first sleeve 12 will not rotate around the axis of the screw 14. The sliding cylinder 131 is pushed by the inner threaded cylinder 132 and gradually approaches the first sleeve 12. The distance between the sliding cylinder 131 and the first sleeve 12 decreases, causing the third connecting rod 321 and the fourth connecting rod 322 to rotate relative to each other. At the same time, the end of the fourth connecting rod 322 slides along the second straight groove 311, causing the second retractable arm 32 to gradually unfold and push the second support arm 31 radially away from the screw 14 until it is in close contact with the inner wall of the second section of the pipe.

[0038] More specifically, in this embodiment, the screw 14 and the end seat 11 are rotatably connected by the first bearing 17, and the slide cylinder 131 and the inner threaded cylinder 132 are rotatably connected by the second bearing 18.

[0039] To facilitate the hinged installation of the connecting rods, the outer edge of the end seat 11 is provided with a connecting lug 4 corresponding to the first connecting rod 221, the outer wall of the first sleeve 12 is provided with a connecting lug 4 corresponding to the second connecting rod 222 and the fourth connecting rod 322, and the outer wall of the slide cylinder 131 is provided with a connecting lug 4 corresponding to the third connecting rod 321. The connection between the first connecting rod 221, the second connecting rod 222, the third connecting rod 321 and the fourth connecting rod 322 and each component is in the form of bolts. In order to avoid the connecting rods getting stuck during the movement, each connecting bolt is not completely tightened, so as to ensure that the first connecting rod 221, the second connecting rod 222, the third connecting rod 321 and the fourth connecting rod 322 still have the necessary rotational freedom after assembly, thereby ensuring the smoothness and flexibility of the extension and retraction action.

[0040] In this embodiment, the first support arm 21 is strip-shaped and extends along the axial direction of the screw 14. Each set of first extension / retraction arms 22 is specifically configured as follows: two first connecting rods 221 and two second connecting rods 222 are symmetrically arranged on both sides of the first support arm 21. During assembly, a bolt is first used to connect the two first connecting rods 221 on both sides of the first support arm 21, making them a linkage. Then, another bolt is used to connect the two second connecting rods 222 on both sides of the first support arm 21. Finally, a third bolt is used to pass through the hinge joint between the connected first connecting rod 221 group and the second connecting rod 222 group, achieving a cross-hinged connection. Similarly, the configuration and connection logic of the second support arm 31 and the second extension / retraction arm 32 are completely consistent with the above, and therefore will not be repeated.

[0041] To provide a better grip and anti-slip performance, an anti-slip sleeve 16 is provided on the end of the second sleeve 13 away from the end seat 11 in this embodiment.

[0042] Compared with the prior art, the beneficial effects of the present invention include at least the following: the built-in, independently adjustable double support structure avoids interference and occupation of the circumferential working space of the pipeline by external positioning fixtures, and solves the problem that traditional external supports hinder welding or bolt installation; at the same time, the device provides symmetrical and stable support from inside the pipeline, which significantly improves the coaxiality of the connection and the positioning stability, and overcomes the defects of low precision and easy damage to the pipe wall caused by manual support or temporary spot welding; in addition, the retractable design of the device not only facilitates quick assembly and disassembly, but also adapts to different pipe diameters within a certain range, improving the flexibility, efficiency and overall quality control of construction.

[0043] The above are preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An internal support positioning device for a pipe fitting, characterized in that, include: Retraction and expansion drive components; The first inner support frame has a plurality of first support arms that are distributed in a ring. Each first support arm is connected to the retraction drive unit through a first retraction arm. The retraction drive unit can drive the first retraction arm to retract and extend along the radial direction of the first inner support frame. The second inner support frame has a plurality of second support arms that are distributed in a ring. Each second support arm is connected to the retraction drive member through a second retraction arm. The retraction drive member can drive the second retraction arm to retract and extend along the radial direction of the second inner support frame. The first inner support frame and the second inner support frame are coaxially configured.

2. The internal support positioning device for pipe assembly according to claim 1, characterized in that, The retraction and extension drive component includes an end seat, a first sleeve, a second sleeve, and a screw. The first sleeve is located between the end seat and the second sleeve. One end of the screw is rotatably connected to the end seat. The first sleeve and the second sleeve are respectively sleeved on the screw and are in transmission cooperation with it. The first retraction and extension arm is movably connected to the first support arm, the first sleeve, and the end seat. The second retraction and extension arm is movably connected to the second support arm, the first sleeve, and the second sleeve.

3. The internal support positioning device for pipe assembly according to claim 2, characterized in that, The first retractable arm includes a first connecting rod and a second connecting rod that are cross-hinged. The first support arm is provided with a first straight slot extending axially along the first inner support frame. The two ends of the first connecting rod are respectively rotatably connected to the first support arm and the end seat. One end of the second connecting rod is movably connected to the first straight slot, and the other end is rotatably connected to the first sleeve.

4. The internal support positioning device for pipe assembly according to claim 2, characterized in that, The second extension arm includes a third link and a fourth link that are cross-hinged. The second support arm is provided with a second straight slot that extends axially along the second inner support frame. The two ends of the third link are rotatably connected to the second support arm and the second sleeve, respectively. One end of the fourth link is movably connected to the second straight slot, and the other end is rotatably connected to the first sleeve.

5. The internal support positioning device for the pipe fitting according to any one of claims 2-4, characterized in that, The second sleeve includes a coaxially arranged sliding cylinder and an inner threaded cylinder. The sliding cylinder is slidably sleeved on the screw, and its two axial ends are respectively rotatably connected to the second retracting arm and the inner threaded cylinder. The rotation axis of the second retracting arm is perpendicular to the rotation axis of the inner threaded cylinder. The inner threaded cylinder is sleeved on the screw and threaded to it.

6. The internal support positioning device for pipe assembly according to claim 5, characterized in that, The screw has a handle at the end away from the end seat.

7. The internal support positioning device for pipe assembly according to claim 5, characterized in that, The end of the second sleeve away from the end seat is provided with an anti-slip sleeve.

8. The internal support positioning device for pipe assembly according to claim 5, characterized in that, The screw and the end seat are connected by a first bearing, and the slide section and the inner threaded section are connected by a second bearing.

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