CN215919380U - Submerged-arc welding reelpipe longitudinal joint welding preheating device - Google Patents
Submerged-arc welding reelpipe longitudinal joint welding preheating device Download PDFInfo
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- CN215919380U CN215919380U CN202122353544.4U CN202122353544U CN215919380U CN 215919380 U CN215919380 U CN 215919380U CN 202122353544 U CN202122353544 U CN 202122353544U CN 215919380 U CN215919380 U CN 215919380U
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Abstract
The utility model provides a submerged-arc welding reelpipe longitudinal seam welding preheating device, which comprises a base, wherein base support rib plates for supporting the base and a steel pipe are respectively connected to two sides of the base, the base support rib plates are arranged at intervals along the length direction of the base and extend along the width direction of the base, lug plates for moving or lifting the base are respectively connected to two sides of the base, an electric heating sheet for heating the steel pipe is arranged on the upper surface of the base, and an electric wire cable of the electric heating sheet is electrically connected with a power supply. The utility model can solve the problems of easy loss of welding preheating heat, uneven preheating and slow preheating, and has more convenient operation, higher efficiency and lower power consumption.
Description
Technical Field
The utility model relates to the technical field of welding and assembling processing, in particular to a longitudinal seam welding preheating device for a submerged-arc welding coiled pipe.
Background
In the fields of petrochemical industry, ocean platforms, ocean jackets, wind power jackets and the like, metal pipes are often used for conveying various media such as oil, gas and water, the requirements are high, pipes made of different materials and with different pipe diameters are also multiple, the technical requirements on the pipes are strict, the welding problem of the pipes is particularly important, and the welding of pipes with large pipe diameters and large wall thicknesses, pipe coiling and lengthening needs to use efficient welding methods such as submerged arc mechanical welding and the like. In order to ensure the welding quality and prevent the welding defect problems such as cold cracks and the like, the key step in analyzing the weldability and designing the welding process is preheating before welding, wherein the preheating before welding can remove the water around the groove of the pipe so as to avoid air holes in the welding seam; the pre-welding preheating can reduce the cooling speed of the welded seam after welding, and prevent the welding problems of welding cracks and the like caused by the generation of brittle and hard tissues such as martensite due to the too high cooling speed; therefore, pre-weld preheating is particularly important for welding carbon steel material pipelines. The greater the tube thickness, the higher the preheat temperature requirement.
During on-site welding, the preheating mode has roast heating and electrical heating, often heating area is limited, and rate of heating is slow, and the heat scatters and disappears seriously, and the heating is inhomogeneous, the inefficiency scheduling problem can not ensure preheating temperature accuracy and stability, consequently, need take measures to guarantee that the reelpipe longitudinal joint welding preheats evenly, and the energy is concentrated, and convenient construction promotes reelpipe efficiency.
The traditional method adopts flame baking to heat and electrically heat, the heating is carried out for one section, the temperature is not well controlled, and the preheating is not uniform; the mode of electrical heating is that directly lay the electrical heating piece on the pipe, get the electrical heating piece again after the heating, begin the welding, the electrical heating piece removes the back, and the temperature also reduces easily, and the temperature is inhomogeneous, and when welding was discontinuous midway, still need preheat again, preheats not thorough inhomogeneous.
In addition, after the preheating temperature reaches the required preheating temperature, the heat source is removed to start welding, the temperature is not easy to control, the preheating is slow, the preheating is not uniform, the heat is easy to lose, the protection is not in place, and the like; affecting the welding quality and efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a longitudinal seam welding preheating device for a submerged-arc welding coiled pipe, which can solve the problems of easy loss of welding preheating heat, uneven preheating and slow preheating, and is more convenient to operate, higher in efficiency and lower in power consumption.
In order to achieve the main purpose, the submerged arc welding coiled pipe longitudinal seam welding preheating device provided by the utility model comprises a base, wherein base support rib plates for supporting the base and a steel pipe are respectively connected to two sides of the base, the base support rib plates are arranged at intervals along the length direction of the base and extend along the width direction of the base, lug plates for moving or hoisting the base are respectively connected to two sides of the base, an electric heating sheet for heating the steel pipe is arranged on the upper surface of the base, and an electric wire cable of the electric heating sheet is electrically connected with a power supply; the base is provided with a cable through hole at one side close to the electric heating piece, and the cable through hole is used for extending out of an electric wire cable of the electric heating piece and is connected to a power supply; the preheating device further comprises heat insulation cotton, and the heat insulation cotton is placed above the inner groove of the steel pipe.
In a further scheme, the upper surface of the base is provided with a groove for placing an electric heating sheet, and the outer contour of the groove is matched with the electric heating sheet.
In a further scheme, two base support rib plates are respectively arranged on one side of the base, are arranged at equal intervals and are vertically welded on the base.
In a further scheme, base support gusset is including the first supporting part that is used for supporting the steel pipe and the second supporting part that contacts ground, first supporting part is the half-circular arc structure that one end to other end radian is crescent gradually, the second supporting part is the straight plate structure, and its bottom is laminated with level ground mutually, half-circular arc structure bottom with straight plate structure surface integrated into one piece.
In a further scheme, the lifting lug plates are provided with holes and are symmetrically welded on two sides of the base respectively.
In a further scheme, the base is formed by welding carbon steel plates.
In a further scheme, the base support rib plate is formed by welding carbon steel plates.
In a further scheme, when the coiled pipe is welded, the preheating device is placed below an external groove of the steel pipe.
In a further scheme, a refractory brick is paved inside the base.
Therefore, the submerged-arc welding coiled pipe longitudinal seam welding preheating device provided by the utility model has the advantages that the steel pipe to be coiled and welded is placed on the preheating device, and submerged-arc welding is carried out according to the welding process after the required preheating temperature is reached.
The bottom of the device is paved with a plurality of layers of refractory bricks, so that the device can resist high temperature and maintain certain heat, and plays roles in heat preservation and auxiliary efficiency improvement; the electric heating plate is arranged on the base, and the steel pipe which is prevented from being rolled and bent and needs to be welded is arranged on the electric heating plate, so that the electric heating plate can be ensured to preheat a longitudinal seam needing to be welded, the steel pipe does not need to be moved, and the movable electric heating plate does not need to be bound; a layer of heat insulation cotton is covered on the inner side of the steel pipe above the longitudinal seam of the steel pipe, so that the steel pipe can be quickly preheated, the energy is saved, the efficiency is improved, and the quality is ensured; when the preheating temperature is required by the welding process, the heat insulation cotton is taken off, and then submerged arc welding can be started.
Therefore, the utility model solves the problems of easy loss of welding preheating heat, uneven preheating and slow preheating, is more convenient to operate, improves the efficiency, saves the energy and ensures the welding quality.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a submerged arc coiled pipe longitudinal seam welding preheating device of the utility model.
FIG. 2 is a front view of an embodiment of a submerged arc coiled pipe longitudinal seam welding preheating device of the present invention.
FIG. 3 is a side view of an embodiment of a submerged arc coiled pipe longitudinal seam welding preheating device of the present invention.
FIG. 4 is a schematic structural diagram of a submerged arc welding coil longitudinal seam welding preheating device with steel pipes removed in the embodiment of the utility model.
FIG. 5 is a schematic structural diagram of a submerged arc welding coil longitudinal seam welding preheating device in an embodiment of the utility model, in which a steel pipe and an electric heating plate are removed.
Fig. 6 is a partially enlarged view of fig. 1.
The utility model is further explained with reference to the drawings and the embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the utility model without any inventive step, are within the scope of protection of the utility model.
Referring to fig. 1 to 6, the submerged arc welding coiled pipe longitudinal seam welding preheating device comprises a base 7, wherein base support rib plates 3 used for supporting the base 7 and a steel pipe 1 are respectively connected to two sides of the base 7, the base support rib plates 3 are arranged at intervals along the length direction of the base 7 and extend along the width direction of the base 7, lug plates 4 used for moving or hoisting the base 7 are respectively connected to two sides of the base 7, an electric heating piece 6 used for heating the steel pipe 1 is arranged on the upper surface of the base 7, and an electric wire cable of the electric heating piece 6 is electrically connected with a power supply.
Wherein, the electric heating plate 6 of this embodiment is placed on the upper strata of base 7, when the reelpipe welding, places preheating device in the below of pipe groove, and electric heating plate 6 circular telegram heats. Of course, the length and number of the electric heating sheets 6 may be increased according to the length of the rolled steel pipe.
Wherein, a cable through hole 5 is arranged at one side of the base 7 close to the electric heating plate 6 for extending out of the electric wire cable of the electric heating plate 6 and connecting to a power supply. Therefore, the cable through hole 5 is formed in the base 7, so that a wire cable of the electric heating sheet 6 can conveniently penetrate out and is connected with a power supply required by heating.
Wherein, preheating device still includes the cotton 2 of heat preservation, and the cotton 2 of heat preservation is placed in steel pipe 1 inside groove top. Therefore, during preheating, the heat insulation cotton 2 is placed above the inner groove of the steel pipe 1, and after preheating is completed, the heat insulation cotton 2 is taken down and welding is started.
In this embodiment, the upper surface of the base 7 is provided with a groove 71 for placing the electric heating sheet 6, and the outer contour of the groove 71 is matched with the electric heating sheet 6.
Preferably, two base support rib plates 3 are respectively arranged on one side of the base 7, and the two base support rib plates 3 are arranged at equal intervals and are vertically welded on the base 7. Certainly, the number of the base support rib plates 3 is not limited to 2, but may be 1, 3 or more than 3, and the base support rib plates can be specifically designed according to the requirements of users.
In this embodiment, base support gusset 3 is including the first supporting part that is used for supporting steel pipe 1 and the second supporting part that contacts ground, and first supporting part is the one end half-circular arc structure to other end radian crescent gradually, and the second supporting part is the straight plate structure, and its bottom is laminated with level ground mutually, half-circular arc structure bottom and straight plate structure surface integrated into one piece.
Wherein, the lifting lug plates 4 are provided with holes and are respectively symmetrically welded on two sides of the base 7. As can be seen, the lifting lug plate 4 is fixed with the base 7 by welding, so that the device is convenient to move or lift;
preferably, the base 7 is welded from a carbon steel plate. Therefore, the base 7 is formed by welding and splicing a wider carbon steel plate with better performance.
Preferably, the base support rib plate 3 is formed by welding carbon steel plates. Therefore, the wider carbon steel plate with better performance is selected, the base support rib plate 3 is spliced by welding and is fixed with the base 7 by welding and used for supporting the base 7 and the steel pipe 1.
Preferably, a refractory brick is laid inside the base 7. Therefore, bricks made of refractory materials are laid in the base 7, the electric heating pieces 6 are placed on the refractory bricks, and the refractory bricks can resist high temperature and have a heat preservation effect to a certain extent. Of course, if necessary, the refractory sand can be additionally paved to achieve better effect.
In this embodiment, the preheating device is placed under the outer bevel of the steel pipe 1 when the coil pipe is welded. The steel pipe 1 to be rolled and welded in the embodiment is a product steel pipe 1 which is actually rolled, and longitudinal seams are welded; the material can be made of different materials, and the specifications such as pipe diameter, wall thickness and the like can be realized. And placing the workpiece on a preheating device, and performing submerged-arc welding according to a welding process after the workpiece reaches the required preheating temperature.
Specifically, the utility model mainly relates to a steel pipe 1 which needs to be rolled and welded, heat insulation cotton 2, a base support rib plate 3, a lug plate 4, a cable through hole 5, an electric heating plate 6 and a base 7.
Cable through holes 5 are formed in two sides and two ends of the base 7, so that wires and cables of the electric heating sheet 6 can conveniently penetrate out and are connected with a power supply required by heating; avoid the cable confusion, increase unsafe factor.
Bricks of refractory material are laid inside the base 7, and electric heating plates 6 are placed on the refractory bricks. The refractory brick can resist high temperature and has the effect of heat preservation to a certain extent. If necessary, refractory sand can be additionally paved to achieve better effect.
The electric heating plate 6 is placed on the upper layer of the base 7, when the reel pipe is welded, the preheating device is placed below the groove of the pipe, and the electric heating plate 6 is electrified for heating.
And (3) placing the heat insulation cotton 2 above the inner groove of the steel pipe 1, taking down the heat insulation cotton 2 after preheating is finished, and starting welding.
In practical use, steel plates with certain strength and specifications are selected and spliced into a base 7 with a large graphic shape, a base supporting rib plate 3 and a lug plate 4 through welding, wire through holes in the base 7 are formed in two sides of the base 7, welding quality needs to be guaranteed, and stability is guaranteed.
Next, bricks of refractory material are laid inside the base 7, on which the electrical heating plates 6 are placed.
Then, the preheating device is placed below the groove of the pipe, the electric heating sheet 6 is electrified for heating, the pipe does not need to be moved or rotated, and the rolled steel pipe 1 can be made of various materials and specifications. And when the preheating temperature meets the requirements of the welding process, starting welding. Therefore, the device is convenient and quick to use, the safety is guaranteed, and the risk caused by misoperation is avoided.
Therefore, the submerged arc welding coiled pipe longitudinal seam welding preheating device provided by the utility model has the advantages that the steel pipe 1 needing to be coiled and welded is placed on the preheating device, and submerged arc welding is carried out according to a welding process after the required preheating temperature is reached.
The bottom of the device is paved with a plurality of layers of refractory bricks, so that the device can resist high temperature and maintain certain heat, and plays roles in heat preservation and auxiliary efficiency improvement; the electric heating plate 6 is arranged on the base 7, the steel pipe 1 which is prevented from being rolled and bent and needs to be welded is arranged on the electric heating plate 6, so that the electric heating plate 6 can preheat a longitudinal seam needing to be welded without moving the steel pipe 1 or binding the electric heating plate 6; a layer of heat insulation cotton 2 is arranged on the longitudinal seam of the steel pipe 1 and on the inner side cover of the steel pipe 1, so that the steel pipe can be quickly preheated, the energy is saved, the efficiency is improved, and the quality is ensured; when the preheating temperature required by the welding process is reached, the heat insulation cotton 2 is taken off, and then submerged-arc welding can be started.
Therefore, the utility model solves the problems of easy loss of welding preheating heat, uneven preheating and slow preheating, is more convenient to operate, improves the efficiency, saves the energy and ensures the welding quality.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made to the present invention by using the design concept also fall within the protection scope of the present invention.
Claims (9)
1. The utility model provides a submerged arc welding reelpipe longitudinal joint welding preheating device which characterized in that includes:
the base comprises a base, wherein base support rib plates used for supporting the base and a steel pipe are respectively connected to two sides of the base, the base support rib plates are arranged at intervals along the length direction of the base and extend along the width direction of the base, lug plates used for moving or hoisting the base are respectively connected to two sides of the base, an electric heating sheet used for heating the steel pipe is arranged on the upper surface of the base, and an electric wire cable of the electric heating sheet is electrically connected with a power supply;
the base is provided with a cable through hole at one side close to the electric heating piece, and the cable through hole is used for extending out of an electric wire cable of the electric heating piece and is connected to a power supply;
the preheating device further comprises heat insulation cotton, and the heat insulation cotton is placed above the inner groove of the steel pipe.
2. The submerged arc coiled pipe longitudinal seam welding preheating device of claim 1, characterized in that:
the base upper surface is equipped with the recess that is used for placing electric heating piece, the outside profile of recess with electric heating piece cooperation sets up.
3. The submerged arc coiled pipe longitudinal seam welding preheating device of claim 1, characterized in that:
and two base support rib plates are respectively arranged on one side of the base, are arranged at equal intervals and are vertically welded on the base.
4. The submerged arc coiled pipe longitudinal seam welding preheating device of claim 3, characterized in that:
the base support gusset is including the first supporting part that is used for supporting the steel pipe and the second supporting part that contacts ground, first supporting part is one end half-circular arc structure to other end radian crescent gradually, the second supporting part is the straight plate structure, and its bottom is laminated with level ground mutually, half-circular arc structure bottom with straight plate structure surface integrated into one piece.
5. The submerged arc coil longitudinal seam welding preheating device according to any one of claims 1 to 4, characterized in that:
the lifting lug plates are provided with holes and are symmetrically welded on two sides of the base respectively.
6. The submerged arc coil longitudinal seam welding preheating device according to any one of claims 1 to 4, characterized in that:
the base is formed by welding carbon steel plates.
7. The submerged arc coil longitudinal seam welding preheating device according to any one of claims 1 to 4, characterized in that:
the base support rib plate is formed by welding carbon steel plates.
8. The submerged arc coil longitudinal seam welding preheating device according to any one of claims 1 to 4, characterized in that:
when the reel pipe is welded, the preheating device is placed below the outer groove of the steel pipe.
9. The submerged arc coil longitudinal seam welding preheating device according to any one of claims 1 to 4, characterized in that:
and refractory bricks are laid in the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122353544.4U CN215919380U (en) | 2021-09-27 | 2021-09-27 | Submerged-arc welding reelpipe longitudinal joint welding preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122353544.4U CN215919380U (en) | 2021-09-27 | 2021-09-27 | Submerged-arc welding reelpipe longitudinal joint welding preheating device |
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| Publication Number | Publication Date |
|---|---|
| CN215919380U true CN215919380U (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122353544.4U Active CN215919380U (en) | 2021-09-27 | 2021-09-27 | Submerged-arc welding reelpipe longitudinal joint welding preheating device |
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| Country | Link |
|---|---|
| CN (1) | CN215919380U (en) |
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2021
- 2021-09-27 CN CN202122353544.4U patent/CN215919380U/en active Active
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