Pipeline welding auxiliary tool

Abstract

The utility model relates to the technical field of pipeline welding equipment, and provides a pipeline welding auxiliary tool which comprises a fixing ring, the fixing ring is divided into at least two arc-shaped sections in the circumferential direction of the fixing ring, every two adjacent arc-shaped sections are rotationally connected, and the axis of rotating connection is parallel to the axis of the fixing ring. The arc-shaped sections at the head and tail ends are detachably connected with each other; the limiting structures are arranged at intervals in the axial direction of the fixing ring, each limiting structure comprises at least three limiting rods arranged at intervals in the circumferential direction of the fixing ring, and at least one limiting rod is arranged on each arc-shaped subsection; the position of the limiting rod is adjustable along the radial direction of the fixing ring. According to the pipeline welding device, the technical problem that in the prior art, pipe openings of two pipelines are manually aligned and welded, the coaxiality of the two pipelines can be affected by the operation level of personnel and the field flatness, and therefore welding defects are prone to being generated in the welding process can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline welding equipment technical field, especially pipeline welding auxiliary frock. BACKGROUND

[0002] In the laying process of pipeline system, the situation of needing to butt joint two pipelines is often encountered; the existing method is generally to align the pipe mouths of two pipelines manually, and then to weld after ensuring that the coaxialities of two pipelines meet the requirements; however, due to the limitation of personnel operation level and site flatness, this method is often difficult to ensure that the pipe mouths of two pipelines remain aligned during the whole welding process, and thus welding defects are easily caused, and there is a certain security risk after pre-burial, and thus a pipeline welding auxiliary frock needs to be developed urgently. SUMMARY

[0003] The utility model aims at overcoming the technical problem that the coaxialities of two pipelines are affected by personnel operation level and site flatness when the pipe mouths of two pipelines are aligned manually and welded in the prior art, and provides a pipeline welding auxiliary frock.

[0004] In a first aspect, the utility model provides a pipeline welding auxiliary frock, comprising:

[0005] The fixed ring is divided into at least two arc segments along the circumference thereof, and the adjacent two arc segments are rotationally connected, and the axis of rotation is parallel to the axis of the fixed ring; the arc segments at the first end and the second end are detachably connected to each other;

[0006] The limiting structure is arranged at intervals along the axial direction of the fixed ring, and each limiting structure comprises at least three limiting rods arranged at intervals along the circumference of the fixed ring, and at least one limiting rod is arranged on each arc segment; the position of the limiting rod along the radial direction of the fixed ring is adjustable.

[0007] When two pipelines need to be butt jointed, the detachable connection of the arc segments at the first end and the second end is released, and at least one arc segment is rotated, so that the fixed ring originally in the form of a closed ring has a gap, so that the pipeline can be directly placed into the fixed ring from the gap, or the fixed ring can be sleeved on the pipeline from the gap; then the fixed ring is moved to the jointing seam of the adjacent two pipelines, and the two limiting structures are respectively clamped on the two pipelines; the limiting rods are moved along the radial direction of the fixed ring to the direction close to the pipeline until the limiting rods abut against the pipeline, so that the pipelines are fixed relative to the fixed ring; whether the pipe mouths of the two pipelines are aligned is observed, if not, the position of the limiting rod along the radial direction of the fixed ring is adjusted, so that the limiting rod pushes the corresponding pipeline to move along the radial direction of the fixed ring; the limiting rod is adjusted until the pipe mouths of the two pipelines are aligned, and then welding operation can be carried out.

[0008] From the above, the two pipes need to be connected to the pipe of the fixed ring, and the position of the pipe relative to the fixed ring depends only on the corresponding limit rod along the radial direction of the fixed ring, which is mainly affected by the machining accuracy and adjustment accuracy of the limit rod, the fixed ring and their mechanical connection structure, and will not be affected by the operation level of the staff, the site flatness, so this scheme can help the staff to align the pipe of the two pipes more accurately and quickly, and keep the two pipes aligned during the whole welding process, so as to ensure the welding quality of the welding operation and avoid welding defects, and then eliminate the safety hazards caused by welding defects.

[0009] Preferably, the limit rod is threadedly connected with the fixed ring, and the axis of the threaded connection is arranged along the radial direction of the fixed ring.

[0010] The position of the limit rod can be adjusted by the threaded connection, which can avoid the self-moving of the limit rod under the radial load, such as the self-weight of the pipe, so as to avoid the offset of the position of the pipe relative to the fixed ring, and further avoid the misalignment of the two pipes to cause welding defects.

[0011] Preferably, the end of the limit rod away from the center of the fixed ring is provided with a hexagonal head.

[0012] The hexagonal head can be rotated by the wrench, which is more labor-saving for the staff.

[0013] Preferably, the end of the limit rod close to the center of the fixed ring is connected with a foot pad.

[0014] The foot pad can make the limit rod more stably abut against the pipe, so as to avoid the relative slip between the limit rod and the pipe, which reduces the positioning accuracy of the pipe and further affects the subsequent welding operation.

[0015] Preferably, the foot pad is movably connected with the limit rod, and the movable connection includes the rotation freedom around the axis of the limit rod.

[0016] Since the limit rod needs to be rotated for adjustment, the foot pad is rotatable on the limit rod, which can avoid the foot pad rotating together with the limit rod relative to the pipe and scratching the pipe.

[0017] Preferably, one side of the foot pad facing the center of the fixed ring is provided with an anti-slip structure, and the anti-slip structure includes at least one of anti-slip lines and rubber pads.

[0018] The anti-slip structure can inhibit the slip of the pipe relative to the limit rod, so as to ensure that the position of the pipe relative to the fixed ring is accurately matched with the position of the limit rod relative to the fixed ring.

[0019] Preferably, the arc-shaped segments at the two ends are connected to each other through threaded connections.

[0020] The present scheme can ensure reliable connection of the arc-shaped segments at the two ends, avoid accidental disconnection of the fixing ring during welding operation, thereby causing the limiting effect of the fixing ring on the pipeline to fail, and further negatively affecting the welding operation.

[0021] Preferably, the lengths of the arc-shaped segments along the circumference of the fixing ring are the same.

[0022] The present scheme is beneficial to manufacturing the arc-shaped segments in the same shape, achieving standardization of the arc-shaped segments, and further improving the production and manufacturing efficiency of the arc-shaped segments.

[0023] Preferably, the number of limiting rods in each set of limiting structures is greater than or equal to six.

[0024] The present scheme can ensure that the limiting rods uniformly support the pipeline along the circumferential direction of the pipeline, avoid uneven stress on the pipeline, thereby causing poor pipeline fixing effect, and further negatively affecting subsequent welding operation.

[0025] Preferably, the limiting rods are uniformly distributed along the circumference of the fixing ring.

[0026] The present scheme can further ensure that the limiting rods uniformly support the pipeline along the circumferential direction of the pipeline.

[0027] Compared with the prior art, the present utility model has the beneficial effects:

[0028] 1. The utility model provides a pipeline welding auxiliary tool, through the limiting rod that can adjust position along the fixed ring radial fixed two pipelines in the fixed ring that can open and close, can help staff more accurately and quickly align the pipe mouth of two pipelines, and keep two pipelines mutually aligned in whole welding process, thereby ensure the welding quality of welding operation and avoid welding defects, and further eliminate the security risks brought by welding defects. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a three-dimensional structure schematic diagram of a pipeline welding auxiliary tool in a closed state of the utility model;

[0030] Figure 2 is a three-dimensional structure schematic diagram of a pipeline welding auxiliary tool in an open state of the utility model;

[0031] Figure 3 is a front view structure schematic diagram of a pipeline welding auxiliary tool of the utility model;

[0032] Figure 4It is the partial sectional side view structural schematic diagram of the limiting rod of the pipeline welding auxiliary tool of the utility model;

[0033] Figure 5 It is the side view structural schematic diagram of the pipeline welding auxiliary tool of the utility model;

[0034] Figure 6 It is the use state three-dimensional structure schematic diagram of the pipeline welding auxiliary tool of the utility model under the opening state;

[0035] Figure 7 It is the use state three-dimensional structure schematic diagram of the pipeline welding auxiliary tool of the utility model under the closing state;

[0036] Figure 8 It is the use state side view structural schematic diagram of the pipeline welding auxiliary tool of the utility model under the closing state;

[0037] Icon: 1-fixed ring;10-arc segment;2-limiting rod;21-hexagonal head;22-thread segment;23-foot pad;3-threaded connecting piece;4-pipeline. DETAILED DESCRIPTION

[0038] The present application will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be understood as limiting the scope of the above-mentioned subject matter of the present application to only the following examples, and any technology realized based on the content of the present application falls within the scope of the present application.

[0039] In the description of the specific embodiments of the present application, the orientation or positional relationship terms appearing in the description, such as "up", "down", "left", "right", "center", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, or are the orientation or positional relationship of the product / device / apparatus of the present application when it is normally used. These orientation or positional relationship terms are only used to facilitate the description of the present application scheme or to simplify the description in the specific embodiments, to facilitate the quick understanding of the scheme by the technicians, and are not intended to indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore cannot be understood as a limitation on the present application.

[0040] In addition, if the terms "horizontal", "vertical", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding device / component / element must be absolutely horizontal or vertical or overhanging or parallel, but can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", not that the structure must be completely horizontal, but can be slightly inclined. Alternatively, it can be simplified to understand that the corresponding device / component / element is arranged in the direction of "horizontal", "vertical", "overhanging", "parallel" and the like, and can have an error / deviation of ±10% relative to the corresponding direction, more preferably an error / deviation of ±8%, more preferably an error / deviation of ±6%, more preferably an error / deviation of ±5%, more preferably an error / deviation of ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the present application.

[0041] In addition, the terms "first", "second", "third" and the like in the terms are only used to distinguish the same or similar components for description, and should not be understood as emphasizing or implying the relative importance of the specific components.

[0042] In addition, in the description of the embodiments of the present application, "several", "a plurality of", "several" represent at least 2. It can be 2, 3, 4, 5, 6, 7, 8, 9, etc. Any case, it can even be more than 9 cases.

[0043] In addition, in the description of the technical solutions of the present application, unless otherwise specified / limited / limited, the terms "arrangement", "installation", "connection", "connection", "provided with", "laid", "arrangement" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, which can be welding, riveting, bolting, screwing, etc. The connection means commonly used in the art. Such connection can be mechanical connection, or electrical connection or communication connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements.

[0044] Embodiment 1

[0045] As shown in Figures 1 to 8 A pipe welding auxiliary tool includes a fixing ring 1 and a limiting structure. The inner diameter of the fixing ring 1 is greater than the outer diameter of the pipe to be welded 4. The fixing ring 1 is divided into at least two arc segments 10 along its circumference. The adjacent two arc segments 10 are rotationally connected, and the axis of rotation is parallel to the axis of the fixing ring 1. The arc segments 10 at the two ends are detachably connected to each other. At least two groups of limiting structures are arranged along the axial direction of the fixing ring 1. Each group of limiting structures includes at least three limiting rods 2 arranged along the circumference of the fixing ring 1. Each arc segment 10 is provided with at least one limiting rod 2. The radial position of the limiting rod 2 along the fixing ring 1 is adjustable.

[0046] In the above embodiments, the two arc-shaped segments 10 at the beginning and end are detachably connected to each other. For example, if the fixing ring 1 is divided into two arc-shaped segments 10, which are respectively the first arc-shaped segment 10 and the second arc-shaped segment 10, one end of the first arc-shaped segment 10 is rotatably connected to one end of the second arc-shaped segment 10, and the other end of the first arc-shaped segment 10 is detachably connected to the other end of the second arc-shaped segment 10. If the fixing ring 1 is divided into three arc-shaped segments 10, which are respectively the first arc-shaped segment 10, the second arc-shaped segment 10, and the third arc-shaped segment 10, the first arc-shaped segment 10 and the second arc-shaped segment 10 are rotatably connected, and the second arc-shaped segment 10 and the third arc-shaped segment 10 are rotatably connected. One end of the first arc-shaped segment 10 away from the second arc-shaped segment 10 and one end of the third arc-shaped segment 10 away from the second arc-shaped segment 10 are detachably connected. The specific way of rotatable connection includes but is not limited to using rotary bearings, hinges, and hinges. The specific way of detachable connection includes but is not limited to mortise and tenon connection, buckle connection, and threaded connection.

[0047] In the above embodiments, the position of the limiting rod 2 along the radial direction of the fixing ring 1 is adjustable. For example, the limiting rod 2 is connected to the fixing ring 1 through a waist-shaped hole, a slide rail, or a screw rod, and the length direction of the waist-shaped hole, the slide rail, or the screw rod is along the radial direction of the fixing ring 1.

[0048] In an optional embodiment, the limiting rod 2 includes a threaded segment 22 provided with external threads, and the fixing ring 1 is provided with a corresponding threaded hole, and the axis of the threaded hole is arranged along the radial direction of the fixing ring 1. The threaded segment 22 is threadedly connected with the threaded hole, and rotating the limiting rod 2 can move the limiting rod 2 along the axis direction of the threaded hole.

[0049] In an optional embodiment, the end of the limiting rod 2 away from the center of the fixing ring 1 is provided with a hexagonal head 21. The hexagonal head 21 includes but is not limited to an internal hexagonal head 21 and an external hexagonal head 21.

[0050] In an optional embodiment, the end of the limiting rod 2 close to the center of the fixing ring 1 is connected with a foot pad 23, and the cross-sectional area of the foot pad 23 is greater than that of the limiting rod 2, so as to increase the contact area between the limiting rod 2 and the pipeline 4.

[0051] In an optional embodiment, the side of the foot pad 23 close to the center of the fixing ring 1 has an arc surface matched with the pipeline 4, so that the foot pad 23 can completely fit the pipeline 4 and has better limiting ability.

[0052] In an optional embodiment, the hardness of the foot pad 23 is less than that of the pipeline 4, so as to prevent the foot pad 23 from scratching the pipeline 4. For example, if the pipeline 4 is made of stainless steel, the foot pad 23 can be a soft iron component, a rubber component, or a plastic component.

[0053] In optional embodiments, the foot pad 23 is movably connected with the limiting rod 2, and the movably connection includes a rotation freedom around the axis of the limiting rod 2. For example Figure 4 As shown, a rotating shaft with an end stopper can be arranged at one end of the limiting rod 2 towards the center of the fixing ring 1, and a corresponding mounting hole is arranged in the foot pad 23, and the mounting hole is in clearance fit with the rotating shaft, so that the foot pad 23 can rotate freely relative to the limiting rod 2.

[0054] In optional embodiments, one side of the foot pad 23 towards the center of the fixing ring 1 is provided with an anti-skid structure, which includes at least one of an anti-skid pattern and a rubber pad.

[0055] In optional embodiments, the arc-shaped segments 10 at the two ends are connected with each other by the threaded connecting piece 3. For example Figures 1 to 3 As shown, a through hole with an axis parallel to the axis of the fixing ring 1 can be arranged at the end of each arc-shaped segment 10 at the two ends, when it is needed to connect the arc-shaped segments 10 at the two ends (i.e. when the fixing ring 1 is closed), the through holes on the two arc-shaped segments 10 are aligned, and the threaded connecting piece 3 such as a double-headed bolt is inserted thereinto, and then a nut is locked, and when it is needed to disconnect the arc-shaped segments 10 at the two ends (i.e. when the fixing ring 1 is opened), the nut is loosened and the threaded connecting piece 3 is pulled out, and then the arc-shaped segments 10 can be rotated freely.

[0056] Correspondingly, the rotation connection between the arc-shaped segments 10 can also be realized in the same way, so that Figures 1 to 3 For example, in the case where the fixing ring 1 contains two arc-shaped segments 10, the two arc-shaped segments 10 are both provided with through holes with axes parallel to the axis of the fixing ring 1, and the threaded connecting piece 3 is inserted into the through holes and locked by the nut; when the nut is tightened, or the threaded connecting piece 3 is inserted into the through holes on both sides, the fixing ring 1 is in a closed state; when the threaded connecting piece 3 on one side is removed and the nut of the threaded connecting piece 3 on the other side is loosened, the arc-shaped segment 10 can rotate around the axis of the remaining threaded connecting piece 3.

[0057] In optional embodiments, the lengths of the arc-shaped segments 10 along the circumference of the fixing ring 1 are the same. For example, for Figures 1 to 3 In the case where the fixing ring 1 contains two arc-shaped segments 10, the two arc-shaped segments 10 are both semicircular segments.

[0058] In optional embodiments, the number of the limiting rods 2 in each limiting structure is greater than or equal to six.

[0059] In optional embodiments, the limiting rods 2 are uniformly distributed along the circumference of the fixing ring 1.

[0060] When it is needed to connect two pipes 4, the detachable connection of the arc-shaped segments 10 at the two ends is released, and at least one arc-shaped segment 10 is rotated, so that the fixing ring 1 originally in the shape of a closed ring is Figure 2The gap shown indicates that it can be directly... Figure 6 As shown, insert pipe 4 into retaining ring 1 through the notch, or slip retaining ring 1 onto pipe 4 through the notch; then move retaining ring 1 to the joint between two adjacent pipes 4, and as shown... Figures 7 to 8 The two sets of limiting structures are respectively locked onto the two pipes 4; the limiting rod 2 is moved radially towards the pipe 4 along the fixing ring 1 until the limiting rod 2 abuts the pipe 4, thus fixing the pipe 4 relative to the fixing ring 1; observe whether the pipe openings of the two pipes 4 are aligned. If they are not aligned, adjust the position of the limiting rod 2 radially along the fixing ring 1 so that the limiting rod 2 pushes the corresponding pipe 4 radially along the fixing ring 1. When adjusting one of the limiting rods 2, the limiting rod 2 on the opposite side radially along the fixing ring 1 can be released first to avoid the limiting rods 2 on both sides squeezing the pipe 4 at the same time; adjust the limiting rod 2 until the pipe openings of the two pipes 4 are aligned, and then welding can be carried out.

[0061] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pipe welding aid characterized by, The utility model relates to a fixing ring (1) is divided into at least two arc segments (10) along its circumference, two adjacent arc segments (10) are rotationally connected, the axis of rotation is parallel to the axis of the fixing ring (1), the arc segment (10) of first and last ends is detachably connected with each other. Limiting structure, at least two groups of limiting structure are arranged along the axial direction of the fixing ring (1), each group of limiting structure includes at least three limiting rods (2) arranged along the circumference of the fixing ring (1), at least one limiting rod (2) is arranged on each arc segment (10), the position of the limiting rod (2) along the radial direction of the fixing ring (1) is adjustable, the limiting rod (2) is screw connected with the fixing ring (1), and the axis of the screw connection is arranged along the radial direction of the fixing ring (1). The end of the limiting rod (2) away from the center of the fixing ring (1) is provided with a hexagonal head (21).

2. A pipe welding aid as defined in claim 1, wherein The end of the limiting rod (2) close to the center of the fixing ring (1) is connected with a foot pad (23).

3. A pipe welding aid as defined in claim 1, wherein, The foot pad (23) is movably connected with the limiting rod (2), and the movable connection includes the rotation freedom around the axis of the limiting rod (2).

4. A pipe welding aid as defined in claim 3, wherein, The side of the foot pad (23) towards the center of the fixing ring (1) is provided with anti-slip structure, and the anti-slip structure includes at least one of anti-slip lines and rubber pads.

5. A pipe welding aid as defined in claim 3, wherein, The arc segment (10) of first and last ends is connected with each other through a threaded connector (3).

6. A pipe welding aid as claimed in any one of claims 1 to 5, wherein, The length of each arc segment (10) along the circumference of the fixing ring (1) is the same.

7. A pipe welding aid as claimed in any one of claims 1 to 5, wherein, The number of limiting rods (2) in each group of limiting structure is greater than or equal to six.

8. A pipe welding aid as claimed in any one of claims 1 to 5, wherein, The limiting rods (2) are uniformly distributed along the circumference of the fixing ring (1).

9. A pipe welding aid as claimed in any one of claims 1 to 5, wherein, ​

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