CN220880891U - Pipeline continuously preheating workbench - Google Patents
Pipeline continuously preheating workbench Download PDFInfo
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- CN220880891U CN220880891U CN202322272495.0U CN202322272495U CN220880891U CN 220880891 U CN220880891 U CN 220880891U CN 202322272495 U CN202322272495 U CN 202322272495U CN 220880891 U CN220880891 U CN 220880891U
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- preheating
- heating
- support
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- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 239000000919 ceramic Substances 0.000 claims description 12
- 238000005485 electric heating Methods 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 67
- 238000000034 method Methods 0.000 abstract description 10
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000010953 base metal Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Abstract
The utility model relates to the field of continuous preheating equipment for large-caliber thick-wall pipeline alloy steel pipes and steel pipes made of other materials when submerged arc welding is used for automatic welding, in particular to a pipeline continuous preheating workbench, which comprises a support frame, wherein a curved surface sliding bracket is fixedly arranged at the top of the support frame, one surface of the curved surface sliding bracket, which is far away from the support frame, is a curved surface, the surface is a heating support surface, a heating device is paved on the heating support surface, and the heating device is connected with a temperature control cabinet; the utility model compares the continuous preheating mode, operability, working efficiency, continuous preheating quality and applicability of the large-caliber thick-wall alloy steel pipeline, has the characteristics of simple local material preparation, strong operability, small and balanced preheating temperature fluctuation and no characteristic of incapable installation, can be used for preheating before welding and in the welding process, and can greatly reduce the construction cost.
Description
Technical Field
The utility model relates to the field of continuous preheating equipment for large-caliber thick-wall pipeline alloy steel pipes and steel pipes made of other materials when submerged arc welding is used for automatic welding, in particular to a pipeline continuous preheating workbench.
Background
The preheating before welding and the continuous preheating in the welding process can slow down the cooling speed of a welding pool of a welding line of a large-diameter thick-wall pipeline during submerged-arc welding, prolong the solidification time of the welding pool during welding, facilitate the diffusion and escape of hydrogen in the pipeline from the welding line, avoid hydrogen cracks, reduce the quenching degree of the welding line and a heat affected zone, and improve the crack resistance of a welded joint. The method can uniformly preheat the base metal around the pipeline weld joint locally or integrally, and can reduce the temperature difference before and after the welding point of the pipeline weld joint, thereby reducing the stress generated by welding. The restraint degree of base materials at two sides of a pipeline welding line can be reduced by continuous preheating, and the crack occurrence rate is reduced along with the increase of the preheating temperature. The preheating is uneven, the temperature difference between the front end and the rear end of the welding spot is overlarge, and defects possibly occur, so that the welding quality of the pipeline is not facilitated.
If the heat output by the linear energy is only used in the welding process of the large-diameter thick-wall steel pipe, the temperature of a molten pool and the temperature of a peripheral base metal of the part where the original welding spot rotates for one circle can be reduced below the preheating temperature under the condition of natural cooling, so that the interlayer temperature is not ensured, the stress of a welding seam can be concentrated, the probability of generating cracks can be increased, and the welding quality can be reduced.
At present, when the conventional large-diameter thick-wall steel pipe is welded by submerged arc welding, if the preheating requirement exists before welding, the gas welding tool is generally adopted for flame heating, and if the use of the fire is limited, the ceramic caterpillar band is mostly adopted for electric heating to cause preheating. When flame heating is adopted, the preheating temperature is not easy to control, the preheating temperature difference is also larger, and the temperature is also continuously measured and preheated again and again in the welding process. When the ceramic track charged heating belt is adopted for preheating, the welding line of the pipeline continuously rotates, the rotation period time is longer, and the lead wire of the crawler ceramic electric heating belt and the lead wire of the thermocouple which are bound and fixed on two sides of the welding line of the pipeline cannot continuously rotate along with the pipeline, so that the welding line of the pipeline cannot be continuously preheated, the welding line and the base metal are heated by the line energy generated during the welding of the pipeline, the temperature of the position after the pipeline rotates for one circle, and the temperature of the base metal at the head end of the welding point and the preheating temperature between the welding line layers cannot be reached, so that the preheating effect in the welding process cannot be ensured.
Disclosure of utility model
In order to solve the problems, the utility model provides a pipeline continuous preheating workbench which is suitable for continuous preheating during welding of petrochemical large-caliber thick alloy steel wall pipelines and has the advantages of simplicity in manufacture, flexibility in movement and convenience in disassembly.
The utility model relates to a pipeline continuous preheating workbench, which comprises a support frame, wherein a curved surface sliding bracket is fixedly arranged at the top of the support frame, one surface of the curved surface sliding bracket, which is far away from the support frame, is a curved surface, the surface is a heating support surface, a heating device is paved on the heating support surface, and the heating device is connected with a temperature control cabinet;
The support frame is a height-adjustable support frame.
Preferably, the support frame comprises a horizontally arranged mounting table and a vertically arranged support column, and the curved surface sliding bracket is fixedly arranged on the mounting table;
The support column sets up three at least, the support column includes sleeve pipe and lifting column, be provided with the external screw thread on the lifting column, threaded connection has back nut on the lifting column, sheathed tube one end links to each other with the mount table is fixed, and sheathed tube other end cup joints on the lifting column, and offsets with back nut, is connected with the universal wheel on the one end that the lifting column kept away from the sheathed tube.
Preferably, the curved surface sliding bracket comprises a left bracket and a right bracket which are symmetrically arranged on the mounting table, wherein one surfaces of the left bracket and the right bracket, which are far away from the mounting table, are supporting surfaces, and the supporting surfaces on the left bracket and the right bracket form the heating supporting surfaces;
the tangent planes of the ends of the support surfaces on the left bracket and the right bracket, which are close to each other, are parallel to the plane of the mounting table.
Preferably, the left bracket and the right bracket are provided with locking sliding grooves on one surface of the mounting table, locking holes are formed in the mounting table corresponding to the positions of the locking sliding grooves, the left bracket and the right bracket are fixedly connected with the mounting table through locking bolts penetrating through the locking sliding grooves and the locking holes, the positions of the locking bolts in the locking sliding grooves are adjusted, and the distance between the left bracket and the right bracket is increased or reduced.
Or preferably, the heating device is a crawler-type ceramic electric heating belt.
Preferably, the heating support surface is an arc surface.
Preferably, the heating support surface radius is 300mm.
Preferably, the sleeve is fixedly connected to the same support plate, which is arranged perpendicular to the sleeve.
The utility model compares the continuous preheating mode, operability, working efficiency, continuous preheating quality and applicability of the large-caliber thick-wall alloy steel pipeline, has the characteristics of simple local material preparation, strong operability, small and balanced preheating temperature fluctuation and no characteristic of incapable installation, can be used for preheating before welding and in the welding process, and can greatly reduce the construction cost. The traditional continuous preheating heating mode has the defects that the flame preheating has low applicability, the infrared radiator heating equipment has high cost and high power, the pipeline is inconvenient to internally install, the elbow is connected with a straight pipe or two sections of longer pipelines can not be installed, the operability is poor, and the use condition of potential safety hazards is relatively high.
The utility model has the advantages of low energy consumption, easy operability, high working efficiency, high quality, strong applicability, high safety and low requirement on using conditions, can be used for preheating before welding and in the welding process, is convenient for manufacturing, mounting and using of first-line heat treatment construction units, and is worthy of popularization and application.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a top view of the heating device removed from the drawing.
Fig. 4 is a perspective view of the heating device removed according to the present utility model.
Reference numerals: 1-heating device, 2-left bracket, 3-right bracket, 4-locking bolt, 5-sleeve, 6-lifting column, 7-back nut.
Detailed Description
The utility model relates to a pipeline continuous preheating workbench, which comprises a support frame, wherein a curved surface sliding bracket is fixedly arranged at the top of the support frame, one surface of the curved surface sliding bracket, which is far away from the support frame, is a curved surface, the surface is a heating support surface, a heating device 1 is paved on the heating support surface, and the heating device 1 is connected with a temperature control cabinet;
The support frame is a height-adjustable support frame.
The support frame comprises a horizontally arranged mounting table and a vertically arranged support column, and the curved surface sliding bracket is fixedly arranged on the mounting table;
The support column sets up three at least, the support column includes sleeve pipe 5 and lift post 6, be provided with the external screw thread on the lift post 6, threaded connection has back nut 7 on the lift post 6, the one end of sleeve pipe 5 links to each other with the mount table is fixed, and the other end of sleeve pipe 5 cup joints on the lift post 6, and offsets with back nut 7, is connected with the universal wheel on the one end that sleeve pipe 5 was kept away from to the lift post 6.
The curved surface sliding bracket comprises a left bracket 2 and a right bracket 3 which are symmetrically arranged on the mounting table, one surfaces, far away from the mounting table, of the left bracket 2 and the right bracket 3 are supporting surfaces, and the supporting surfaces of the left bracket 2 and the right bracket 3 form the heating supporting surfaces;
The tangential planes of the ends of the support surfaces of the left bracket 2 and the right bracket 3, which are close to each other, are parallel to the plane of the mounting table.
The left bracket 2 and the right bracket 3 are provided with locking sliding grooves towards one surface of the installation table, locking holes are formed in the installation table at positions corresponding to the locking sliding grooves, the left bracket 2 and the right bracket 3 are fixedly connected with the installation table through locking bolts 4 penetrating through the locking sliding grooves and the locking holes, the positions of the locking bolts 4 in the locking sliding grooves are adjusted, and the distance between the left bracket 2 and the right bracket 3 is increased or reduced.
The heating device 1 is a crawler-type ceramic electric heating belt.
The heating supporting surface is an arc surface.
The radius of the heating support surface is 300mm.
The sleeve 5 is fixedly connected with the same supporting plate, and the supporting plate is vertically arranged with the sleeve 5.
When the ceramic crawler belt electric heating device is used, the distance between the left bracket 2 and the right bracket 3 on the device is adjusted according to the diameter of a pipeline, then a ceramic crawler belt electric heating belt with the length and the width being matched with those of a heating supporting surface is selected, and the ceramic crawler belt electric heating belt is placed on the heating supporting surface; according to the position of the welding seam of the automatic welding, the utility model is arranged under the welding seam, the height is adjusted to be 3 cm-5 cm away from the position under the welding seam of the bottom of the automatic welding pipeline, and the clearance between the crawler-type ceramic electric heating belt and the outer wall of the pipeline is ensured, so that the damage to a tool or the crawler-type ceramic electric heating belt caused by the friction of the outer surface of the bottom pipeline without clearance is prevented. The baking temperature of the crawler-type ceramic electric heating belt is monitored by a thermocouple of the temperature control cabinet, and the preheating temperature of the welding seam head end of the pipeline is monitored at any time by an infrared thermometer or a thermocouple. Before welding, when the preheating temperature reaches the welding temperature of the pipe, the automatic welding machine is started.
The temperature control cabinet can be used for controlling the temperature in the welding process, the infrared thermometer is used for continuously measuring the position of the head end of the welding spot of the welding seam, a temperature balance point is found, the peripheral temperature of the welding seam is ensured to be always in a standard range, the infrared thermometer is used for measuring the temperature of the head end of the welding spot of the welding seam at intervals to prevent over-temperature, and therefore continuous preheating work is carried out before welding of alloy steel pipes, and welding quality is ensured.
The pipeline continuous preheating workbench provided by the utility model has the following beneficial effects:
The utility model has the advantages of simple structure, convenient manufacture, local material drawing on the construction site and great reduction of the construction cost.
Compared with the traditional infrared radiator and flame preheating equipment, the welding seam automatic welding device has the advantages that the installation is difficult, the welding seam automatic welding of part of pipe fittings is free from being incapable of being installed, compared with the traditional heating mode of flame preheating and infrared preheating, the welding seam automatic welding device is higher in applicability, wide in preheating range, excellent in continuous preheating effect, balanced in continuous preheating temperature and guaranteed in preheating quality, and the welding quality of large-caliber thick-wall alloy steel pipes and other material pipes is further improved.
The utility model has adjustable height and adjustable heating pipe diameter, and is suitable for all alloy steel pipes and other steel pipes with nominal diameter ranging from DN650 to DN1500 and wall thickness ranging from delta=20mm to 70mm, which are preheated before welding and continuously in the welding process.
Claims (8)
1. The pipeline continuous preheating workbench comprises a support frame and is characterized in that a curved surface sliding bracket is fixedly arranged at the top of the support frame, one surface of the curved surface sliding bracket, which is far away from the support frame, is a curved surface, the surface is a heating support surface, a heating device is paved on the heating support surface, and the heating device is connected with a temperature control cabinet;
The support frame is a height-adjustable support frame.
2. The continuous pipeline preheating workbench according to claim 1, wherein the supporting frame comprises a horizontally arranged mounting table and a vertically arranged supporting column, and the curved sliding bracket is fixedly arranged on the mounting table;
The support column sets up three at least, the support column includes sleeve pipe and lifting column, be provided with the external screw thread on the lifting column, threaded connection has back nut on the lifting column, sheathed tube one end links to each other with the mount table is fixed, and sheathed tube other end cup joints on the lifting column, and offsets with back nut, is connected with the universal wheel on the one end that the lifting column kept away from the sheathed tube.
3. The continuous preheating workbench for pipelines according to claim 2, wherein the curved sliding brackets comprise a left bracket and a right bracket which are symmetrically arranged on the mounting table, wherein one surfaces of the left bracket and the right bracket, which are far away from the mounting table, are supporting surfaces, and the supporting surfaces on the left bracket and the right bracket form the heating supporting surfaces;
the tangent planes of the ends of the support surfaces on the left bracket and the right bracket, which are close to each other, are parallel to the plane of the mounting table.
4. A pipeline continuous preheating workbench according to claim 3, wherein a locking chute is arranged on one surface of the left bracket and the right bracket facing the mounting table, a locking hole is arranged on the mounting table corresponding to the locking chute, the left bracket and the right bracket are fixedly connected with the mounting table through locking bolts penetrating through the locking chute and the locking hole, the positions of the locking bolts in the locking chute are adjusted, and the distance between the left bracket and the right bracket is increased or decreased.
5. A pipeline continuous preheating workbench according to any of claims 2-4, wherein said heating means is a caterpillar ceramic electric heating belt.
6. The continuous preheating table for a pipeline according to claim 5, wherein the heating support surface is an arc surface.
7. A pipeline continuous pre-heat stage according to claim 6, wherein said heated support surface has a radius of 300mm.
8. A pipeline continuous preheating workbench according to claim 7, wherein said sleeves are fixedly connected to the same support plate, said support plate being arranged perpendicular to the sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272495.0U CN220880891U (en) | 2023-08-23 | 2023-08-23 | Pipeline continuously preheating workbench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272495.0U CN220880891U (en) | 2023-08-23 | 2023-08-23 | Pipeline continuously preheating workbench |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220880891U true CN220880891U (en) | 2024-05-03 |
Family
ID=90875340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322272495.0U Active CN220880891U (en) | 2023-08-23 | 2023-08-23 | Pipeline continuously preheating workbench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220880891U (en) |
-
2023
- 2023-08-23 CN CN202322272495.0U patent/CN220880891U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |