Super-large-diameter thick-wall pipe weld joint heat treatment brace

Abstract

The utility model provides a heat treatment brace for a welding seam of an ultra-large-diameter thick-wall pipe. In order to solve the problem that a heat preservation structure is inconvenient to arrange on the inner wall of the position, to be subjected to heat treatment, of an existing ultra-large-diameter thick-wall pipe, an arc-shaped support and a telescopic supporting rod are matched, and heat preservation cotton on the upper portion and part of the side face in the pipeline is supported through an outer ring of the arc-shaped support; the heat preservation cotton located on the lower portion can be attached to the inner wall of the pipeline under the action of gravity, laying arrangement of the heat preservation cotton on the inner wall of the pipeline is achieved, the problem that a heat preservation structure is inconvenient to arrange on the inner wall of the position, to be subjected to heat treatment, of an existing ultra-large-diameter thick-wall pipe is solved, heat loss is reduced, and the heat treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of pipeline welding heat treatment, in particular to a super-large diameter thick-walled pipe weld heat treatment support. Background Art

[0002] Generally, for alloy steel pipes and carbon steel pipes with wall thickness exceeding the standard requirements, residual stress exists in the weld after welding. These stresses will cause the generation and development of cracks, aggravate stress corrosion, and affect the service life of the pipeline. In order to eliminate welding residual stress and improve the performance of the welded joint area, heat treatment is required after welding, especially for large-diameter thick-walled pipes. For pipes with a diameter of no more than 1 meter, the main means of post-weld heat treatment is to tie heaters and insulation cotton on the outer ring of the part to be heat treated, and the inner ring of the part to be heat treated also needs to be insulated accordingly. However, due to the small diameter of the pipe, it is inconvenient for personnel to enter the interior to lay the insulation cotton. Therefore, the two ends of the pipe near the weld are generally blocked to reduce heat loss.

[0003] However, for extra-large thick-walled pipes with a diameter of more than 1 meter, during post-weld heat treatment, it is relatively simple to tie the heater and insulation cotton to the outer circle of the heat-treated part, but it is inconvenient to fix the insulation cotton in the inner circle of the heat-treated part. If the full-section filling and sealing method is adopted, due to the large size of the extra-large thick-walled pipe, the consumption of insulation cotton during filling and sealing is also large. There is also the problem of poor fit between the insulation cotton and the inner wall of the extra-large thick-walled pipe during the filling process, which increases its heat loss, affects the heat treatment effect of the weld and its surrounding areas, and increases construction costs. Utility Model Content

[0004] The purpose of the utility model is to provide a super-large diameter thick-walled pipe weld heat treatment support in view of the defects of the prior art, which adopts an arc-shaped support and a telescopic support rod to cooperate with each other, and utilizes the outer ring of the arc-shaped support to support the thermal insulation cotton on the upper part and part of the side of the pipe. The thermal insulation cotton located at the lower part can maintain contact with the inner wall of the pipe under the action of gravity, so as to realize the laying arrangement of the thermal insulation cotton on the inner wall of the pipe, solve the problem that it is inconvenient to arrange the thermal insulation structure on the inner wall of the existing super-large diameter thick-walled pipe to be heat treated, reduce heat loss and improve the heat treatment effect.

[0005] In order to achieve the above purpose, the following technical solutions are adopted:

[0006] A super-large diameter thick-walled pipe weld heat treatment support, comprising:

[0007] The arc-shaped bracket comprises a plurality of connecting rods, wherein the axes of the connecting rods are parallel to the axes of the arc-shaped bracket;

[0008] The telescopic support rod can be extended and retracted along the axial direction, and a sleeve is provided at one axial end, and the sleeve is sleeved outside a connecting rod to form a rotation connection;

[0009] The support is located outside the range of the arc-shaped bracket. The support is connected to the arc-shaped bracket through three telescopic struts. The telescopic struts are rotatably connected to the support at one end away from the sleeve in the axial direction.

[0010] Furthermore, the arc-shaped bracket also includes two arc-shaped rods arranged at intervals along its axial direction, and a plurality of connecting rods are connected between the two arc-shaped rods.

[0011] Furthermore, the two arc-shaped rods are arranged equidistantly, and the outer ring of the arc-shaped bracket forms a supporting arc surface for contacting the thermal insulation cotton.

[0012] Furthermore, the arc-shaped bracket is an elastic structure, and the chord length at the opening of the arc-shaped bracket can be adjusted under the action of the telescopic support rod.

[0013] Furthermore, the telescopic support rod passes through the opening of the arc-shaped support and is connected to the support.

[0014] Furthermore, the ends of the three telescopic support rods installed on the support are connected to different circumferential positions of the arc-shaped bracket.

[0015] Furthermore, the axis of one of the three telescopic struts is arranged vertically, and the other two telescopic struts are symmetrically distributed relative to the vertically arranged strut.

[0016] Furthermore, the telescopic support rod includes a branch tube and a supporting screw rod, one end of the supporting screw rod is inserted into the branch tube to form a sliding connection, and an adjusting nut is matched on the supporting screw rod, and the adjusting nut abuts against one end of the branch tube.

[0017] Furthermore, one axial end of the branch pipe is connected to the sleeve, and the other end abuts against the adjusting nut.

[0018] Furthermore, the support is provided with support shafts distributed at intervals, and one end of the telescopic support rod axially away from the sleeve is rotatably connected to the support shaft.

[0019] Compared with the prior art, the utility model has the following advantages and positive effects:

[0020] (1) In view of the problem that it is inconvenient to set up an insulation structure on the inner wall of the super-large diameter thick-walled pipe to be heat treated, an arc-shaped bracket and a telescopic support rod are used in combination, and the outer ring of the arc-shaped bracket is used to support the insulation cotton on the upper part and part of the side of the pipe. The insulation cotton at the lower part can maintain contact with the inner wall of the pipe under the action of gravity, so that the insulation cotton can be laid on the inner wall of the pipe, thereby solving the problem that it is inconvenient to arrange the insulation structure on the inner wall of the super-large diameter thick-walled pipe to be heat treated, reducing heat loss and improving the heat treatment effect.

[0021] (2) An elastic arc-shaped bracket is used instead of a full-circular structure. It can be elastically deformed when placed in the pipeline, making it easy to move and adjust its position in the pipeline. It is supported by telescopic struts to deform it into an arc-shaped structure that adapts to the inner wall of the pipeline, ensuring the support effect on the thermal insulation cotton to improve the thermal insulation performance after laying.

[0022] (3) Supports are provided to jointly support the telescopic struts, constraining the telescopic struts to be away from one end of the sleeve so that they can be subjected to force in a coordinated manner. At the same time, they can be arranged symmetrically to ensure support stability.

[0023] (4) One end of the telescopic strut is connected to the connecting rod of the arc-shaped bracket through a sleeve rotation, which can adapt to the angle change of the telescopic strut through relative rotation when the axial length of the telescopic strut is adjusted. The telescopic strut can also adjust the axial length to push the arc-shaped bracket to form different deformation amounts, thereby adapting to pipes of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1 It is a schematic diagram of a heat treatment bracket for super-large diameter thick-walled pipe welds in an embodiment of the utility model.

[0026] Figure 2 It is a schematic diagram of the arrangement of the heat treatment bracket for the weld of the super-large diameter thick-walled pipe in the pipeline in the embodiment of the utility model.

[0027] Figure 3 It is a schematic diagram of the relative positions of the heat treatment bracket for the super-large diameter thick-walled pipe weld and the thermal insulation cotton in the embodiment of the utility model.

[0028] In the figure, 1. support, 2. telescopic support rod, 3. arc rod, 4. sleeve, 5. connecting rod, 6. arc bracket, 7. thermal insulation cotton, 8. pipe. DETAILED DESCRIPTION

[0029] In a typical implementation of the present invention, Figure 1-Figure 3 As shown, a heat treatment bracket for ultra-large diameter thick-walled pipe welds is proposed.

[0030] Below, a super-large diameter thick-walled pipe weld heat treatment bracket is described in detail with reference to the accompanying drawings.

[0031] like Figure 2As shown, the super-large diameter thick-walled pipe weld heat treatment bracket is used to assist in the heat treatment of super-large diameter thick-walled pipes with a diameter of more than 1 meter. It can support the thermal insulation cotton 7 inside the super-large diameter thick-walled pipe, so that the thermal insulation cotton 7 can be stably laid at the position to be heat treated to achieve insulation. Combined with external heating and other insulation structures, the performance of the super-large diameter thick-walled pipe joint area is met. The joint area corresponds to the weld and its surrounding areas. The super-large diameter thick-walled pipe weld heat treatment bracket is used to assist in the insulation work of the corresponding area of ​​the inner wall of the pipeline 8.

[0032] like Figure 1 As shown, the heat treatment bracket for the weld of the super-large diameter thick-walled pipe includes an arc-shaped bracket 6, a telescopic support rod 2 and a support 1. The arc-shaped bracket 6 serves as the main structure for contacting and supporting the thermal insulation cotton 7. It can carry the thermal insulation cotton 7 and lay the thermal insulation cotton 7 on the inner wall of the pipe 8. One end of the telescopic support rod 2 is connected to the connecting rod 5 of the arc-shaped bracket 6 through a sleeve 4. The sleeve 4 and the connecting rod 5 of the arc-shaped bracket 6 form a rotational connection, so that the telescopic support rod 2 can be rotated to adjust the angle when it is extended and retracted along the axial direction; the support 1 serves as the bottom bearing structure, and the arc-shaped bracket 6 is connected through three telescopic support rods 2 to maintain the position of the arc-shaped bracket 6.

[0033] When the arc bracket 6 supports the thermal insulation cotton 7, it needs to adapt to the direction of the inner wall of the pipe 8. The arc bracket 6 is an elastic structure, which can be deformed under the action of the telescopic support rod 2 to achieve an arc shape coaxially distributed with the inner wall of the pipe 8. Therefore, in this embodiment, the axis of the arc bracket 6 is colinear with the axis of the pipe 8 where the arc bracket 6 is matched. The axial direction of the arc bracket 6 also refers to the direction in which the axis of the pipe 8 extends. Correspondingly, a plurality of connecting rods 5 are provided on the arc bracket 6, and the axis of the connecting rod 5 is parallel to the axis of the arc bracket 6. When the arc bracket 6 and the pipe 8 are not matched, the arc bracket 6 changes from an arc shape to an arc. At this time, for the convenience of expression, the axis in the arc state is still called the axis in the ordinary arc state.

[0034] The support rod can be extended and retracted along its axial direction. After one end of the support rod is connected to the support 1, the arc-shaped bracket 6 at the connection sleeve 4 can be deformed by extension and retraction.

[0035] The support 1 is located outside the range of the arc-shaped bracket 6, and the support 1 is connected to the arc-shaped bracket 6 through three telescopic struts 2. The end of the telescopic strut 2 axially away from the sleeve 4 is rotatably connected to the support 1, so as to adapt to the distribution angle change caused by the change of the axial length of the telescopic strut 2.

[0036] like Figure 1 As shown, the structure of the arc bracket 6 is described in detail. The arc bracket 6 includes an arc rod 3 and a connecting rod 5, wherein two arc rods 3 are spaced apart along the axial direction of the arc bracket 6, and the two arc rods 3 are equidistantly arranged, and the outer ring of the arc bracket 6 forms a supporting arc surface for contacting the thermal insulation cotton 7; multiple connecting rods 5 are connected between the two arc rods 3.

[0037] The arc-shaped rod 3 is an elastic rod. In order to maintain the distance between the two arc-shaped rods 3, the connecting rod 5 can be a rigid rod.

[0038] The arc-shaped bracket 6 forms an elastic structure, and the chord length at the opening of the arc-shaped bracket 6 can be adjusted under the action of the telescopic support rod 2, and the adjustment process is realized by using the curvature change of the elastic arc-shaped rod 3.

[0039] When the chord length at the opening of the arc-shaped bracket 6 is shortened, the two sides of the arc-shaped bracket 6 can be separated from the position of fitting the inner wall of the pipe 8, thereby facilitating the adjustment of the position; when the corresponding field at the opening of the arc-shaped bracket 6 is extended, the two sides of the arc-shaped bracket 6 can gradually approach the inner wall of the pipe 8 until the thermal insulation cotton 7 is pushed to fit.

[0040] like Figure 1 and Figure 2 As shown, the telescopic support rod 2 passes through the opening of the arc-shaped bracket 6 and is connected to the support 1, so that the support 1 is located outside the range of the arc-shaped bracket 6. The support 1 can abut against the bottom of the inner wall of the pipe 8, support the arc-shaped bracket 6, the telescopic support rod 2 and stabilize their positions.

[0041] The ends of the three telescopic struts 2 installed on the support 1 are connected to different circumferential positions of the arc-shaped bracket 6 to achieve multi-point support. The axis of one of the three telescopic struts 2 is arranged vertically, and the other two telescopic struts 2 are symmetrically distributed relative to the vertically arranged strut, so as to present a Figure 1 The bracing state is shown.

[0042] The support 1 is provided to jointly support the telescopic support rod 2, constraining the telescopic support rod 2 to be away from the position of one end of the sleeve 4 so that they can be subjected to force in a coordinated manner, and at the same time, they can be arranged symmetrically to ensure support stability.

[0043] like Figure 1 As shown, for the structure of the telescopic support rod 2, the present embodiment adopts a sliding plug-in method of the branch tube and the supporting screw rod. The telescopic support rod 2 includes a branch tube and a supporting screw rod. One end of the supporting screw rod is inserted into the branch tube and forms a sliding connection. The supporting screw rod is equipped with an adjusting nut, which abuts against one end of the branch tube. One axial end of the branch tube is connected to the sleeve 4, and the other end abuts against the adjusting nut.

[0044] One end of the telescopic strut 2 is rotated through the sleeve 4 to connect the connecting rod 5 of the arc-shaped bracket 6, which can adapt to its angle change through relative rotation when the telescopic strut 2 adjusts its axial length. The telescopic strut 2 can also adjust the axial length to push the arc-shaped bracket 6 to form different deformation amounts, thereby adapting to pipes 8 of different sizes.

[0045] The support 1 is provided with support shafts distributed at intervals, and one end of the telescopic support rod 2 axially away from the sleeve is rotatably connected to the support shaft. There are three support shafts, which are connected to the three telescopic support rods 2 in a one-to-one correspondence.

[0046] It is understandable that the arc-shaped bracket 6 can also be used to carry and position other heat treatment tools such as the heater, and the heater or insulation cotton 7 can be fixed using the tensioning principle. The heater or insulation cotton 7 only covers the vicinity of the circumferential weld on the inner wall of the pipe 8 and covers the weld position, effectively ensuring the insulation effect and reducing the consumption of the insulation cotton 7.

[0047] When using:

[0048] (1) The device is set in a relaxed state, the telescopic support rod 2 is shortened to a state convenient for insertion into the pipe 8, the arc-shaped support 6 is bent to a state convenient for insertion into the pipe 8, and is placed inside the pipe 8 near the weld;

[0049] (2) Place the insulation cotton 7 tightly against the arc-shaped bracket 6, and first adjust the telescopic support rod 2 arranged vertically in the middle so that the top of the arc-shaped bracket 6 is in close contact with the top of the inner wall of the pipe 8;

[0050] (3) Adjust the two tilted telescopic support rods 2 so that the two sides of the arc-shaped support 6 are in close contact with the two sides of the inner wall of the pipe 8, so that the top and side insulation cotton 7 are in the desired state;

[0051] (4) The heat-insulating cotton 7 at the bottom of the pipe 8 is kept in contact with the inner wall of the pipe 8 under the action of gravity, and the support 1 abuts against the bottom of the inner wall of the pipe 8 to maintain the stability of the arc-shaped bracket 6 and the telescopic support rod 2.

[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A super-large diameter thick-walled pipe weld heat treatment bracket, characterized in that: include: The arc-shaped bracket comprises a plurality of connecting rods, wherein the axes of the connecting rods are parallel to the axes of the arc-shaped bracket; The telescopic support rod can be extended and retracted along the axial direction, and a sleeve is provided at one axial end, and the sleeve is sleeved outside a connecting rod to form a rotation connection; The support is located outside the range of the arc-shaped bracket. The support is connected to the arc-shaped bracket through three telescopic struts. The telescopic struts are rotatably connected to the support at one end away from the sleeve in the axial direction.

2. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 1, characterized in that: The arc-shaped bracket also includes two arc-shaped rods arranged at intervals along its axial direction, and a plurality of connecting rods are connected between the two arc-shaped rods.

3. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 2, characterized in that: The two arc-shaped rods are arranged at equal distances, and the outer ring of the arc-shaped bracket forms a supporting arc surface for contacting the thermal insulation cotton.

4. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 1, 2 or 3, characterized in that: The arc-shaped bracket is an elastic structure, and the chord length at the opening of the arc-shaped bracket can be adjusted under the action of the telescopic support rod.

5. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 4, characterized in that: The telescopic support rod passes through the opening of the arc-shaped support and is connected to the support.

6. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 1, characterized in that: The ends of the three telescopic support rods installed on the support are connected to different circumferential positions of the arc-shaped bracket.

7. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 6, characterized in that: The axis of one of the three telescopic struts is arranged vertically, and the other two telescopic struts are symmetrically distributed relative to the vertically arranged strut.

8. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 1, 6 or 7, characterized in that: The telescopic support rod comprises a branch pipe and a supporting screw rod, one end of the supporting screw rod is inserted into the branch pipe to form a sliding connection, and an adjusting nut is matched on the supporting screw rod, and the adjusting nut abuts against one end of the branch pipe.

9. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 8, characterized in that: One axial end of the branch pipe is connected to the sleeve, and the other end abuts against the adjusting nut.

10. The super-large diameter thick-walled pipe weld heat treatment bracket according to claim 1, characterized in that: The support is provided with support shafts which are distributed at intervals, and one end of the telescopic support rod axially away from the sleeve is rotatably connected to the support shaft.

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