Longitudinal seam welding device for small pressure steel pipe
By designing a longitudinal seam welding device for small pressure steel pipes, using gantry, electric hoist and detachable guide rail to achieve separate welding of inner and outer longitudinal seams, the problems of poor welding firmness and single application range of existing devices are solved, and the welding effect and scope of application of equipment are improved.
Patent Information
- Application Number
- CN202421798521.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing pressure steel pipe longitudinal seam welding devices cannot be welded separately to the inner and outer longitudinal seams. The welding is not firm and the equipment cost is high, and the scope of application is single.
A small pressure steel pipe longitudinal joint welding device is designed, including a gantry, an electric hoist, a detachable guide rail and a moving welding device, which can be welded internal and external longitudinal joints along the guide rail.
The inner and outer joints of the steel pipes have been welded separately, greatly improving the welding firmness and strength, suitable for steel pipes of different sizes, and expanding the scope of application.
Smart Images
Figure CN222919887U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal pipe processing, in particular to a longitudinal seam welding device for a small-sized penstock. Background Art
[0002] The penstock is an important water conservancy project material, and its manufacturing process involves multiple links. Among them, the most important ones are rolling and butt welding of steel plates; when the pipe diameter is small, it can be directly rolled and welded by one steel plate; when the pipe diameter is large, two or more steel plates need to be rolled and butt welded.
[0003] Generally, the longitudinal seam welding of the penstock is carried out by cooperating an overhanging welding platform and a roller rack. The penstock is placed on the fixed roller rack, and the overhanging welding platform runs back and forth to complete the longitudinal seam welding; however, the overhanging welding platform and the roller rack are relatively expensive, the equipment cost is high, and the inner and outer longitudinal seams cannot be welded separately during use, and the welding firmness is not good; in addition, the applicable range during welding is also relatively single, and the use effect is not ideal. Content of the Utility Model
[0004] The purpose of the utility model is to solve the above problems and provide a longitudinal seam welding device for a small-sized penstock that can weld the inner and outer longitudinal seams, greatly improves the welding firmness of the steel pipe, and the whole can be applicable to steel pipes of different sizes with a large applicable range.
[0005] To achieve the above purpose, the technical solution of the utility model is: a longitudinal seam welding device for a small-sized penstock, including a gantry and a steel pipe inside the gantry. Electric hoists are respectively arranged on both sides of the gantry. The electric hoists are connected to a support frame through pulling ropes. A detachable guide rail is arranged inside the support frame. A mobile welding device is arranged inside the guide rail. The mobile welding device can move along the guide rail, and the steel pipe is arranged directly below the guide rail.
[0006] Preferably, a supporting roller is arranged at the bottom of the steel pipe, and both ends of the supporting roller are installed on the ground through bearing seats.
[0007] Preferably, the mobile welding device includes a welding trolley, and the welding trolley welds the longitudinal seam of the steel pipe when moving along the guide rail.
[0008] Preferably, the guide rail and the welding trolley can be installed inside the steel pipe.
[0009] Preferably, limiting rods are symmetrically arranged on both sides of the support frame, and vertical limiting grooves are arranged inside the gantry. When the support frame moves up and down, the limiting rods move along the limiting grooves.
[0010] A longitudinal seam welding device for a small - sized penstock disclosed by the utility model comprises a gantry and a penstock inside the gantry. Electric hoists are respectively arranged on both sides of the gantry. The electric hoists are connected to a support frame through pulling ropes. A detachable guide rail is arranged inside the support frame. A mobile welding device is arranged inside the guide rail and can move along the guide rail. The penstock is arranged directly below the guide rail. Compared with the prior art, when in use, this longitudinal seam welding device for a small - sized penstock can weld both inner and outer longitudinal seams, greatly improving the welding firmness of the penstock, and the whole device can be applicable to penstocks of different sizes, having the beneficial effect of a large application range. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 FIG. is a schematic view of the overall structure of a longitudinal seam welding device for a small - sized penstock of the present utility model Figure 1 。
[0012] Figure 2 FIG. is a schematic view of the overall structure of a longitudinal seam welding device for a small - sized penstock of the present utility model Figure 2 。
[0013] Figure 3 FIG. is a schematic view of the overall structure of a longitudinal seam welding device for a small - sized penstock of the present utility model Figure 3 。
[0014] In the figure: 1. Gantry; 11. Limit groove; 2. Electric hoist; 3. Pulling rope; 4. Support frame; 41. Limit rod; 5. Guide rail; 6. Welding carriage; 7. Roller; 71. Bearing seat; 8. Penstock. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] Now, the present utility model will be further described in detail with reference to the accompanying drawings. The drawings are simplified schematic views, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0016] Please refer to Figures 1-3 , a longitudinal seam welding device for a small - sized penstock, comprising a gantry 1 and a penstock 8 inside the gantry 1. Electric hoists 2 are respectively arranged on both sides of the gantry 1. The electric hoists 2 are connected to a support frame 4 through pulling ropes 3. Therefore, when the electric hoists 2 operate, the support frame 4 can be driven to lift and lower through the pulling ropes 3. A detachable guide rail 5 is arranged inside the support frame 4. It is most convenient that the support frame 4 and the guide rail 5 are connected by bolts. A mobile welding device is arranged inside the guide rail 5 and can move along the guide rail 5. The penstock 8 is arranged directly below the guide rail 5.
[0017] Specifically, the mobile welding device includes a welding carriage 6, and the welding carriage 6 welds the longitudinal seam of the penstock 8 when moving along the guide rail 5.
[0018] Since the guide rail 5 is detachably connected to the support frame 4, when welding the longitudinal seam of the steel pipe 8, the outer seam and the inner seam can be welded separately, thereby improving the welding firmness and strength. When the guide rail 5 and the welding trolley 6 are arranged outside the steel pipe, the outer seam of the steel pipe is welded; when the guide rail 5 and the welding trolley 6 are arranged inside the steel pipe, the inner seam of the steel pipe is welded.
[0019] Please refer to again Figures 1-2 , Figures 1-2 for welding the outer seam of the steel pipe. Before welding the outer seam, first turn the longitudinal seam of the steel pipe to the uppermost position, then the electric hoist 2 runs to drive the pulling rope 3 to lift the support frame 4 to an appropriate height, and then drive the welding trolley 6. At this time, the welding trolley 6 will weld along the uppermost longitudinal seam.
[0020] Please refer to again Figure 3 , Figure 3 for welding the inner seam of the longitudinal seam of the steel pipe. Before welding the inner seam, first rotate the steel pipe 8 so that the longitudinal seam is at the lowermost position, then disassemble the guide rail 5 and lower the support frame 4, and then pass the guide rail 5 through the steel pipe and fix it on the support frame 4; then adjust the height of the guide rail 5 and the welding trolley 6 again through the electric hoist and the pulling rope 3 until the welding trolley 6 can contact the inner seam of the longitudinal seam; when the welding trolley moves along the guide rail 5, the inner seam is welded.
[0021] Using like this can weld the inner and outer parts of the longitudinal seam of the steel pipe separately, greatly improving the welding firmness, increasing the strength of the steel pipe, and meeting the use requirements.
[0022] In addition, since the electric hoist 2 and the pulling rope 3 can adjust the height of the guide rail 5 and the welding trolley 6, it can be adjusted in real time according to the different diameters of the steel pipes during use, and can meet the welding use of steel pipes of different thicknesses, with a relatively wide range of applications.
[0023] Furthermore, two supporting rollers 7 for support are provided at the bottom of the steel pipe 8. The two ends of the supporting roller 7 are installed on the ground through bearing seats 71. The setting of the supporting roller 7 can adjust the position of the longitudinal seam of the steel pipe, facilitate the correspondence between the longitudinal seam and the welding trolley, and improve the welding accuracy.
[0024] In order to ensure that the guide rail 5 and the welding trolley 6 do not shift and shake during the vertical lifting process, limiting rods 41 are symmetrically arranged on both sides of the support frame 4, and vertical limiting grooves 11 are provided on the inner side of the gantry 1. When the support frame 4 moves up and down, the limiting rods 41 move along the limiting grooves 11. The outer ends of the limiting rods 41 are always arranged inside the limiting grooves 11, so the stability of the support frame 4 is improved and overall shaking is avoided.
[0025] In this embodiment, the two electric hoists 2 always run simultaneously.
[0026] In this embodiment, during the welding process, the bottom circumference of the idler roller 7 is supported and limited by external objects to prevent rotation during welding.
[0027] In this embodiment, the gantry, support frame, guide rail, etc. are all welded and fabricated from construction waste materials, with low overall cost and easy fabrication, saving costs for construction.
[0028] The steel pipe 8 in this embodiment is formed by bending a steel plate. When the steel plate is bent to form the steel pipe, there is a gap on the side, and this gap is the longitudinal seam of the steel pipe. This device is used to weld the inner and outer longitudinal seams of the steel pipe.
[0029] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
Claims
1. A small pressure steel pipe longitudinal seam welding device, comprising a gantry and a steel pipe in the gantry, characterized in that: Electric hoists are respectively provided on both sides of the gantry, and the electric hoists are connected to the support frame through pull ropes. A detachable guide rail is provided in the support frame, and a mobile welding device is provided in the guide rail. The mobile welding device can move along the guide rail, and the steel pipe is arranged directly below the guide rail.
2. The small pressure steel pipe longitudinal seam welding device according to claim 1 is characterized in that: A supporting roller is provided at the bottom of the steel pipe, and both ends of the supporting roller are installed on the ground through bearing seats.
3. The small pressure steel pipe longitudinal seam welding device according to claim 1 or 2, characterized in that: The mobile welding device comprises a welding carriage, and the welding carriage welds the longitudinal seam of the steel pipe when moving along the guide rail.
4. The small pressure steel pipe longitudinal seam welding device according to claim 3 is characterized in that: The guide rail and the welding carriage can be installed in the steel pipe.
5. The small pressure steel pipe longitudinal seam welding device according to claim 1 is characterized in that: Limiting rods are symmetrically arranged on both sides of the support frame, and a vertical limiting groove is arranged on the inner side of the gantry frame. When the support frame moves up and down, the limiting rod moves along the limiting groove.