Hardening and tempering type high-strength structural steel straight seam pipe welding device and welding system
By designing a heat-resistant high-strength structural steel straight seam pipe welding device with support and heating mechanisms, the problem of temperature maintenance during the longitudinal splicing of straight seam pipes was solved, enabling continuous and efficient welding, improving welding quality and reducing energy consumption.
Patent Information
- Application Number
- CN202423241194.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the existing technology, during the longitudinal splicing process of Q690D straight seam pipe, it is difficult to maintain the temperature of the steel plate, resulting in slow welding speed, large workload and easy cold cracking, which is more obvious in winter.
A welding device for quenched and tempered high-strength structural steel straight seam pipes is designed, including a support mechanism and a heating mechanism. The support mechanism supports the straight seam pipe in a horizontal state, and the heating mechanism heats the splice seam from below. The temperature is maintained between 150℃ and 200℃ using heating belts and insulation cotton, and continuous welding is achieved in conjunction with an automatic submerged arc welding machine.
It effectively solves the problem of maintaining the temperature of the splice seam, ensures welding continuity, reduces workload, improves welding efficiency and quality, simplifies post-weld processing, and saves energy.
Smart Images
Figure CN223811662U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to welding technical field relates to a kind of welding auxiliary device, especially to a kind of quenching and tempering high-strength structural steel straight seam pipe welding device and welding system. BACKGROUND
[0002] 2000t fixed hoist boom structure adopts truss structure type, main chord is Q690D material's straight seam pipe, according to the size of numerical control bending machine, the maximum length of straight seam pipe is defined as 11m, after steel plate is bent into circular arc shape, it is transferred to prewelding machine and is folded and spliced seam to make pipe into circle and spot welding fixed, then it is transferred to automatic submerged arc welding machine and carries out the welding of longitudinal splicing seam. Due to the particularity of Q690D material, steel plate at splicing seam needs to be preheated to 150~200 DEG C before welding, then welding is carried out using welding wire with diameter Φ4mm, after welding, weld needs to be treated to remove hydrogen, that is, weld is heated to 280~300 DEG C, and holding time is not less than 2 hours, then it is wrapped with heat insulation cotton and naturally cooled, otherwise cold crack is likely to occur. According to the traditional method, longitudinal splicing seam of whole pipe is preheated to 150~200 DEG C, then pipe is hoisted to support frame, and automatic submerged arc welding machine is used for welding, due to slow welding speed, weld length is very long, when the rear section of pipe is welded, the temperature of steel plate at splicing seam has dropped, pipe needs to be unloaded and reheated, so work load is increased, and the continuity of weld cannot be guaranteed, and welding defects are likely to occur. Especially in winter, steel plate cooling speed is faster, and the welding work of straight seam pipe is more affected. CONTENT OF UTILITY MODEL
[0003] The utility model provides a kind of quenching and tempering high-strength structural steel straight seam pipe welding device and welding system to overcome the defects of prior art.
[0004] To achieve the above object, the utility model adopts the following technical solutions:
[0005] Firstly, the utility model provides a kind of quenching and tempering high-strength structural steel straight seam pipe welding device, for assisting straight seam pipe welding, including support mechanism and heating mechanism;Support mechanism and heating mechanism are located below the straight seam pipe;The straight seam pipe is placed on support mechanism, and splicing seam faces down, and support mechanism supports straight seam pipe to be in horizontal state;Heating mechanism heats splicing seam from below.
[0006] Further, the support mechanism includes a plurality of support components arranged along the axial direction of the straight seam pipe;The support component includes two support members arranged on both sides below the straight seam pipe, and the straight seam pipe is placed on the two support members;The heating mechanism passes through the support component and is located between the two support members.
[0007] Further, the supporting assembly further comprises a supporting frame; two supporting members are arranged on the supporting frame and can move along the radial direction of the straight-seam pipe relative to the supporting frame.
[0008] Further, the supporting member comprises a roller and a roller support; the roller support is arranged on the supporting frame; the roller is mounted on the roller support and can rotate relative to the roller support, the rotation axis is parallel to the axial direction of the straight-seam pipe; the roller support has a bolt hole, the supporting frame has a waist-shaped hole arranged along the radial direction of the supporting pipe, and the roller support is adjustably connected to the waist-shaped hole of the supporting frame through a bolt and a nut.
[0009] Further, the supporting frame can move up and down.
[0010] Further, the supporting frame is provided with two slide rail supports, which are respectively arranged on the left and right sides of the supporting frame; the inner side of the slide rail support is provided with a vertically arranged sliding groove; the left and right sides of the supporting frame are fixedly provided with sliding blocks matched with the sliding grooves, the two sliding blocks are arranged in the corresponding sliding grooves and can slide up and down along the sliding grooves; the supporting assembly further comprises at least one jack; the jack is arranged below the supporting frame and supports the supporting frame.
[0011] Further, the heating mechanism comprises a heating belt; the heating belt is arranged below the straight-seam pipe along the axial direction of the straight-seam pipe and above the supporting frame.
[0012] Further, the heating mechanism further comprises thermal insulation cotton; the thermal insulation cotton is arranged below the straight-seam pipe along the axial direction of the straight-seam pipe, the heating belt is arranged above the thermal insulation cotton and above the supporting frame.
[0013] Further, the heating mechanism further comprises a support frame; the support frame is composed of a support plate and a plurality of supporting legs, and the support plate is fixed on the supporting legs; the support plate is arranged above the supporting frame, and the supporting legs are arranged between the supporting assemblies; the thermal insulation cotton is arranged on the upper surface of the support plate.
[0014] In the second aspect, the utility model provides a kind of welding system, including automatic submerged arc welding machine and guide rail thereof, and the tempering type high-strength structural steel straight-seam pipe welding device described above;Guide rail is arranged in one side of tempering type high-strength structural steel straight-seam pipe welding device, and with the straight-seam pipe on the tempering type high-strength structural steel straight-seam pipe welding device is located on same straight line;Automatic submerged arc welding machine is arranged on guide rail, can walk on guide rail and carry out welding to the joint seam of straight-seam pipe.
[0015] The utility model discloses beneficial effect lies in: the utility model provides a kind of tempering type high-strength structural steel straight seam pipe welding device and welding system that can be continuously heated for the problems existing in straight seam pipe longitudinal joint seam welding process, to solve the problem that steel plate temperature is difficult to keep at joint seam during welding process, effectively avoid the situation that cold crack appears due to temperature drop, so that welding can be continuously carried out, thereby reduce the welding workload, improve welding efficiency and quality. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the side view structural schematic diagram of tempering type high-strength structural steel straight seam pipe welding device.
[0017] Figure 2 It is the main view structural schematic diagram of tempering type high-strength structural steel straight seam pipe welding device.
[0018] Figure 3 It is the side view structural schematic diagram of welding system. DETAILED DESCRIPTION
[0019] The specific implementation of the utility model will be described below in combination with the drawings.
[0020] Example 1
[0021] As shown in Figure 1 and Figure 2 , the embodiment provides a kind of tempering type high-strength structural steel straight seam pipe welding device, including support mechanism and heating mechanism.Support mechanism and heating mechanism are located below straight seam pipe A.Support mechanism supports straight seam pipe A to be in horizontal state with straight seam pipe A being placed on support mechanism, and joint seam faces down.Heating mechanism heats joint seam from below.
[0022] Specifically, regarding the supporting mechanism: the supporting mechanism comprises a plurality of supporting assemblies 1 arranged along the axis of the straight seam pipe A. The supporting assembly 1 comprises two supporting members 11, which are arranged on the two sides below the straight seam pipe A, and the straight seam pipe A is placed on the two supporting members 11. The heating mechanism passes through the supporting assembly 1 and is located between the two supporting members 11.
[0023] The supporting assembly 1 further comprises a supporting frame 12. The two supporting members 11 are arranged on the supporting frame 12 and can move along the radial direction of the straight seam pipe A relative to the supporting frame 12. By moving, the distance between the two supporting members 11 can be changed, so that the supporting mechanism is suitable for straight seam pipes A with different diameters.
[0024] In an embodiment, the supporting member 11 comprises a roller 111 and a roller support 112. The roller support 112 is arranged on the supporting frame 12. The roller 111 is mounted on the roller support 112 and can rotate relative to the roller support 112, and the rotation axis is parallel to the axis of the straight seam pipe A. The roller support 112 has a bolt hole, and the supporting frame 12 has a waist-shaped hole arranged along the radial direction of the supporting pipe. The roller support 112 is adjustably connected to the waist-shaped hole of the supporting frame 12 by means of a bolt and a nut. That is, the roller support 112 is placed above the corresponding waist-shaped hole, the bolt hole is aligned with the waist-shaped hole, the bolt passes through the bolt hole and the waist-shaped hole, and the nut is tightened. The roller support 112 is fixed on the supporting frame 12. The adjustment method of the movement of the roller support 112 is as follows: loosen the nut, move the roller support 112 along the waist-shaped hole, and then tighten the nut to fix the roller support 112 when it reaches the desired position.
[0025] The supporting frame 12 can move up and down.
[0026] In an embodiment, the supporting frame 12 is provided with two slide rail supports 131 fixed to the ground, which are respectively located on the left and right sides of the supporting frame 12. The inner side of the slide rail support 131 has a vertically arranged sliding groove, and the sliding groove is coated with lubricating grease. The left and right sides of the supporting frame 12 are fixed with sliding blocks 132 matched with the sliding grooves, and the two sliding blocks 132 are respectively arranged in the corresponding sliding grooves and can slide up and down along the sliding grooves. The supporting assembly 1 further comprises at least one jack 133. The jack 133 is arranged below the supporting frame 12 and supports the bottom of the supporting frame 12. That is, the supporting frame 12 is adjusted by the jack 133 to realize lifting movement, so that the supporting member 11 realizes lifting movement.
[0027] Regarding the heating mechanism: the heating mechanism comprises a heating belt 21. The heating belt 21 is arranged below the straight seam pipe A along the axis of the straight seam pipe A and above the supporting frame 12 between the two supporting members 11.
[0028] The heating mechanism further comprises heat insulation cotton 22. The heat insulation cotton 22 is arranged axially below the straight-seam pipe A and above the support frame 12 and between the two support members 11, and the heating belt 21 is laid above the heat insulation cotton 22.
[0029] The heating mechanism further comprises a support frame. The support frame is composed of a support plate 231 and a plurality of support legs 232. The support legs 232 are all fixed on the ground, and the support plate 231 is fixed on the plurality of support legs 232. The support plate 231 is above the support frame 12 and between the two support members 11, and the plurality of support legs 232 are between the plurality of support assemblies 1. The heat insulation cotton 22 is laid on the upper surface of the support plate 231.
[0030] Embodiment 2
[0031] As shown in Figure 3 the embodiment, a welding system is provided, which comprises an automatic submerged arc welding machine 31 and a guide rail 32 thereof, and the tempered high-strength structural steel straight-seam pipe welding device of embodiment 1.
[0032] The guide rail 32 is arranged on one side of the tempered high-strength structural steel straight-seam pipe welding device and is in the same straight line with the straight-seam pipe on the tempered high-strength structural steel straight-seam pipe welding device. Specifically, the center line of the guide rail 32 coincides with the longitudinal center line of the support frame (support plate 231) and the center line of the support frame 12. The automatic submerged arc welding machine 31 is arranged on the guide rail 32 and can walk on the guide rail 32 and weld the joint seam of the straight-seam pipe A. The automatic submerged arc welding machine and the guide rail thereof are prior art and will not be described in detail.
[0033] During welding, the guide rail 32 of the automatic submerged arc welding machine 31 is fixed on the ground, and the center line of the guide rail 32 coincides with the longitudinal center line of the support frame and the center line of the support frame 12. The automatic submerged arc welding machine 31 is arranged on the guide rail 32, and the automatic submerged arc welding machine 31 can move along the guide rail 32 through the walking drive of the automatic submerged arc welding machine 31 itself. Before hoisting the straight-seam pipe A, the distance between the two rollers 111 in each support assembly 1 is adjusted according to the diameter of the straight-seam pipe A, so as to adapt to the diameter of the straight-seam pipe A. The support frame 12 is lifted through the jack 133, that is, the roller 111 is lifted, so as to avoid that the heating belt 21 is damaged by the pressure of the straight-seam pipe A when the straight-seam pipe A is placed. Then, the heat preservation cotton 22 is laid on the support frame, and the heating belt 21 is placed on the heat preservation cotton 22. The straight-seam pipe A is hoisted and placed on the two rollers 111 of the plurality of support assemblies 1, and the longitudinal joint seam of the straight-seam pipe A faces downward. The support frame 12 is slowly lowered through the adjustment of the jack 133, and the roller 111 and the straight-seam pipe A are slowly lowered, so that the lower joint seam of the straight-seam pipe A is attached to the heating belt 21, but it needs to be noted that the heating belt 21 cannot be pressed by the weight of the straight-seam pipe A, so as to avoid that the heating belt 21 is damaged. The automatic submerged arc welding machine 31 is controlled to slowly move towards the straight-seam pipe A, and whether the center of the arc mechanism head of the automatic submerged arc welding machine 31 is aligned with the center of the joint seam of the straight-seam pipe A is observed through the camera of the cantilever head of the automatic submerged arc welding machine 31. If the center is not aligned, the straight-seam pipe A is adjusted until the center of the arc mechanism head of the automatic submerged arc welding machine 31 is aligned with the center of the joint seam of the straight-seam pipe A. After the position of the straight-seam pipe A is corrected, the heating belt 21 is started, the temperature of the joint seam of the straight-seam pipe A is heated to 150-200 DEG C, the heating belt 21 continues to work at the set temperature, and the automatic submerged arc welding machine 31 is started to weld the joint seam of the straight-seam pipe A. During the welding process, whether the center of the arc mechanism head of the automatic submerged arc welding machine 31 is aligned with the center of the joint seam of the straight-seam pipe A is observed through the operation table of the automatic submerged arc welding machine 31 at any time, and the position of the arc mechanism head is finely adjusted through the operation table of the automatic submerged arc welding machine 31, so as to ensure that the center of the arc mechanism head of the automatic submerged arc welding machine 31 is always aligned with the center of the joint seam of the straight-seam pipe A during the whole welding process, and welding defects such as incomplete penetration are avoided. The heat preservation cotton 22 can reduce the cooling speed of the joint seam of the straight-seam pipe A, so that the energy consumption of the heating belt 21 can be saved. After the welding is completed, the straight-seam pipe A is hoisted down, the weld is heated to 280-300 DEG C, the heat preservation time is not less than 2 hours, and the straight-seam pipe A is wrapped with the heat preservation cotton 22, so as to be naturally cooled.
[0034] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back" and the like cited in the utility model are only for the convenience of clear description, and are not used to limit the scope of the utility model. The change or adjustment of the relative relationship is also regarded as the scope of the utility model without substantial change of the technical content.
[0035] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used to limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel, for assisting in the welding of the straight-seam pipe, characterized in that: it comprises a supporting mechanism and a heating mechanism; the supporting mechanism and the heating mechanism are both located below the straight-seam pipe; the straight-seam pipe is placed on the supporting mechanism with the spliced seam facing downward, and the supporting mechanism supports the straight-seam pipe in a horizontal state; the heating mechanism heats the spliced seam from below; the supporting mechanism comprises a plurality of supporting assemblies arranged along the axial direction of the straight-seam pipe; each supporting assembly comprises two supporting members arranged on both sides below the straight-seam pipe, and the straight-seam pipe is placed on the two supporting members; the heating mechanism passes through the supporting assemblies and is located between the two supporting members; each supporting assembly further comprises a supporting frame; the two supporting members are arranged on the supporting frame and can move along the radial direction of the straight-seam pipe relative to the supporting frame; the heating mechanism comprises a heating belt; the heating belt is arranged below the straight-seam pipe along the axial direction of the straight-seam pipe and above the supporting frame; the heating mechanism further comprises thermal insulation cotton; the thermal insulation cotton is arranged below the straight-seam pipe along the axial direction of the straight-seam pipe, and the heating belt is arranged above the thermal insulation cotton and above the supporting frame.
2. The device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel according to claim 1, characterized in that: each supporting member comprises a roller and a roller support; the roller support is arranged on the supporting frame; the roller is mounted on the roller support and can rotate relative to the roller support, and the axis of rotation is parallel to the axial direction of the straight-seam pipe; the roller support has a bolt hole, and the supporting frame has a waist-shaped hole arranged along the radial direction of the pipe; the roller support is adjustably connected to the waist-shaped hole of the supporting frame through a bolt and a nut.
3. The device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel according to claim 1, characterized in that: the supporting frame can move up and down.
4. The device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel according to claim 3, characterized in that: the supporting frame is provided with two slide rail supports arranged on the left and right sides of the supporting frame respectively; the inner side of each slide rail support has a vertically arranged sliding groove; the left and right sides of the supporting frame are fixed with sliding blocks matched with the sliding grooves, and the two sliding blocks are arranged in the corresponding sliding grooves and can slide up and down along the sliding grooves; each supporting assembly further comprises at least one jack; the jack is arranged below the supporting frame and supports the supporting frame.
5. The device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel according to claim 1, characterized in that: the heating mechanism further comprises a bracket; the bracket is composed of a support plate and a plurality of supporting legs, and the support plate is fixed on the supporting legs; the support plate is located above the supporting frame, and the supporting legs are located between the supporting assemblies; the thermal insulation cotton is laid on the upper surface of the support plate.
6. A welding system, characterized in that: it comprises an automatic submerged arc welding machine and its guide rail, and the device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel according to any one of claims 1-5; the guide rail is arranged on one side of the device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel, and the straight-seam pipe on the device for welding a straight-seam pipe of a quenched and tempered high-strength structural steel is located on the same straight line as the guide rail; the automatic submerged arc welding machine is arranged on the guide rail and can walk on the guide rail to weld the spliced seam of the straight-seam pipe.