A pre-tightening device for manufacturing multi-layer wrapped containers

Abstract

This utility model discloses a pre-tightening device for manufacturing multi-layer wrapping containers. A steel wire rope is looped around an inner cylinder, which is positioned below a positioning plate. A pre-curved layer plate is then looped onto the inner cylinder, with the weld seam of the layer plate aligned with the bottom of the positioning plate. A hydraulic cylinder then actuates to increase the distance between the fixing frame and the positioning plate, causing the steel wire rope to tighten the layer plate onto the inner cylinder. The distance between two sets of pulleys is less than the diameter of the inner cylinder, limiting the distance between the steel wire ropes on both sides and ensuring better fit between the layer plate and the inner cylinder. Simultaneously, the steel wire rope tightens the layer plate, and guided by the arc-shaped structure at the bottom of the positioning plate, the weld seams of the layer plate, i.e., the two ends of the layer plate, align and wrap the layer plate. This solution utilizes the cooperation of the steel wire rope, hydraulic cylinder, and positioning plate to achieve layer wrapping. The process is simple, time-saving, and labor-saving, and more convenient than traditional clamping methods.

Description

Technical Field

[0001] This utility model belongs to the field of pressure vessel manufacturing, and in particular relates to a pre-tightening device for manufacturing multi-layer wrapped containers. Background Technology

[0002] In industries such as petroleum and chemical engineering, multi-layer wrapped pressure vessels are widely used for the storage and transportation of gases and liquids in harsh working environments such as high pressure and high temperature. Multi-layer integral wrapped pressure vessels offer advantages such as no deep circumferential welds, ideal structure, high safety, low cost, and short construction period, gradually replacing multi-layer cylindrical wrapped pressure vessels. During manufacturing, attention must be paid to the fit quality between the layers and the inner cylinder, as well as the staggering of the welds between each layer. Traditionally, the manufacturing process of multi-layer wrapped pressure vessels uses two semi-circular clamps to tightly fit the layers to the inner cylinder or adjacent layers. However, both ends of the clamps need to be fixed with bolts, making disassembly cumbersome when wrapping multiple layers, resulting in a long manufacturing cycle for the entire layer wrapping process. Therefore, it is necessary to design a new type of tooling to simplify the manufacturing process of multi-layer wrapped pressure vessels. Utility Model Content

[0003] (1) Technical problem to be solved: Provide a pre-tightening device for manufacturing multi-layer wrapping containers.

[0004] (2) The technical solution adopted by this utility model is as follows:

[0005] A pre-tightening device for manufacturing multi-layer wrapping containers includes a steel wire rope and, from top to bottom, a fixed frame, a hydraulic cylinder, and a positioning plate. The fixed frame has a lifting lug at its top and a winding shaft in its middle, which is rotatably connected to the fixed frame. A locking assembly is provided between the winding shaft and the fixed frame. The fixed frame and the positioning plate are connected via the hydraulic cylinder, which can adjust the distance between them. The positioning plate has an arc-shaped bottom with a slot. Two sets of pulleys are symmetrically arranged inside the slot. One end of the steel wire rope is fixed to the fixed frame, and the other end passes through the two sets of pulleys and is wound around the winding shaft, with the rope portion of the steel wire rope located between the two sets of pulleys.

[0006] A further technical solution is that the locking component includes two baffles fixed on the winding shaft, the baffles having positioning holes, the fixing frame having pin holes, and a pin being inserted inside the pin holes, the pin passing through the positioning holes on the two baffles.

[0007] (3) Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: When in use, the wire rope is looped on the inner cylinder, the inner cylinder is located below the positioning plate, the pre-curved layer plate is looped on the inner cylinder, the weld position of the layer plate is directly opposite the bottom of the positioning plate, and then the hydraulic cylinder is activated to increase the distance between the fixed frame and the positioning plate. The wire rope tightens the layer plate on the inner cylinder. The distance between the two sets of pulleys is less than the diameter of the inner cylinder. The two sets of pulleys can limit the distance between the wire ropes on both sides, so that the layer plate fits better with the inner cylinder. While the wire rope tightens the layer plate, under the guidance of the arc-shaped structure at the bottom of the positioning plate, the weld position of the layer plate, that is, the two ends of the layer plate, is aligned with each other to achieve the wrapping of the layer plate. This solution uses the cooperation of the wire rope, hydraulic cylinder and positioning plate to achieve the wrapping of the layer plate. During the process, the hydraulic cylinder can be controlled to tighten the layer plate. The operation is simple, time-saving and labor-saving. Compared with the traditional clamping method, it is more convenient. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0009] Figure 2 yes Figure 1 A schematic diagram of the structure on the other side of the state shown;

[0010] Figure 3 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0011] Figure 4 This is a schematic diagram of the overall three-dimensional structure of this utility model from another perspective;

[0012] Figure 5 This is a schematic diagram of the overall use of this utility model.

[0013] Figure 6 This is a schematic diagram from another perspective when the entire utility model is in use;

[0014] Figure 7 This is a schematic diagram of the layer fitting process of this utility model. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] like Figures 1-7As shown. A pre-tightening device for manufacturing multi-layer wrapping containers includes a steel wire rope 1 and, from top to bottom, a fixed frame 2, a hydraulic cylinder 6, and a positioning plate 8. A winding shaft 3 is provided in the middle of the fixed frame 2, and the winding shaft 3 is rotatably connected to the fixed frame 2. A locking component is provided between the winding shaft 3 and the fixed frame 2. The fixed frame 2 and the positioning plate 8 are connected by the hydraulic cylinder 6, which can adjust the distance between the fixed frame 2 and the positioning plate 8. The bottom of the positioning plate 8 has an arc-shaped structure, and a groove is provided at the bottom of the positioning plate 8. The slot 7 has two sets of pulleys 10 symmetrically arranged inside. One end of the wire rope 1 is fixed to the fixed frame 2, and the other end of the wire rope 1 is wound around the winding shaft 3 after passing through the two sets of pulleys 10. The rope portion of the wire rope 1 is located between the two sets of pulleys 10. The locking assembly includes two baffles 5 fixed to the winding shaft 3. The baffles 5 have positioning holes 9, and multiple positioning holes 9 can be arranged circumferentially. The fixed frame 2 has pin holes 11, and pins 4 are arranged inside the pin holes 11, passing through the positioning holes 9 on the two baffles 5. A rocker arm is fixed to the end of the winding shaft 3.

[0017] Working principle: The basic structure of pressure vessel layer wrapping is as follows: after the end caps are welded to both ends of the inner cylinder, the inner cylinder with end caps is placed on the roller frame, so that the inner cylinder is in a suspended state, and the inner cylinder with end caps can rotate as a whole (the inner cylinder with end caps is installed on the rotating bracket). The purpose is to allow the inner cylinder to rotate when wrapping the layers so that the weld seams of the layers can be staggered. The traditional method of using two semi-circular clamps to tighten the layers also requires the inner cylinder to be in a suspended state and able to rotate. When using, select one or more pre-tightening devices for multi-layer wrapping container manufacturing according to the size of the pressure vessel. The top of the fixed frame 2 is equipped with lifting lugs, which are used to connect the hook of the crane. The process of looping the wire rope 1 onto the inner cylinder is as follows: the end of the wire rope 1 that is fixed to the fixed frame 2 is first passed through the bottom of the inner cylinder and then fixed to the fixed frame 2. Depending on the diameter of the inner cylinder, the winding shaft 3 is rotated to release or tighten the wire rope 1. After determining the diameter, the pin 4 is inserted into the pin hole 11 and the positioning hole 9 to lock the winding shaft 3. Before placing the shelf, a sufficient distance is maintained between the wire rope 1 and the inner cylinder. After the pre-bent shelf is looped onto the inner cylinder, the opening between the two ends of the shelf should be smaller than the inner cylinder. The hydraulic pump is started to supply oil to the hydraulic cylinder 6. The piston of the hydraulic cylinder 6 extends, increasing the distance between the fixed frame 2 and the positioning plate 8. The wire rope 1 tightens the shelf onto the inner cylinder. The two sets of sliding... The distance between the pulleys 10 is less than the diameter of the inner cylinder. The two sets of pulleys 10 can limit the distance between the steel wire ropes 1 on both sides, so that the shelf can fit better with the inner cylinder. While the steel wire ropes 1 tighten the shelf, under the guidance of the arc-shaped structure at the bottom of the positioning plate 8, the weld position of the shelf, that is, the two ends of the shelf, are aligned with each other to achieve the wrapping of the shelf. The piston rod of the hydraulic cylinder 6 is fixed to the fixed frame 2 by bolts, and the cylinder body of the hydraulic cylinder 6 is fixed to the positioning plate 8 by bolts. The length of the positioning plate 8 should at least cover the diameter of the last layer of shelf after wrapping (that is, the outer diameter of the formed pressure vessel). Two steel wire ropes 1 are used, and each set of pulleys 10 has two wheel grooves.

[0018] Sheet assembly process: Pre-bend and roll the shelf ends within 300mm according to the diameter of each shelf to ensure the fit between the shelf ends and the inner cylinder and the upper shelf after wrapping. Weld lifting lugs to the longitudinal ends of the shelf for use in shelf assembly and rotation after assembly (as shown in the figure). After the shelves are assembled, use an electric hoist to rotate the longitudinal seam of the shelf to the top. Use a roller frame rotating device to adjust the longitudinal seam position of the upper shelf to meet the angle requirements between the longitudinal welded joints of the shelf as required by the drawings and technical conditions. After the adjustment is appropriate, use a pre-tightening device to pre-tighten the shelf.

[0019] The above are merely preferred embodiments of this utility model.

Claims

1. A pre-tensioning device for the manufacture of multi-ply wrapped containers, characterized by, The system includes a wire rope (1) and a fixed frame (2), a hydraulic cylinder (6) and a positioning plate (8) arranged sequentially from top to bottom. A winding shaft (3) is provided in the middle of the fixed frame (2). The winding shaft (3) is rotatably connected to the fixed frame (2). A locking component is provided between the winding shaft (3) and the fixed frame (2). The fixed frame (2) and the positioning plate (8) are connected by the hydraulic cylinder (6). The hydraulic cylinder (6) can adjust the distance between the fixed frame (2) and the positioning plate (8). The bottom of the positioning plate (8) is an arc-shaped structure, and a slot (7) is provided at the bottom of the positioning plate (8). Two sets of pulleys (10) are symmetrically arranged inside the slot (7). One end of the wire rope (1) is fixed to the fixed frame (2), and the other end of the wire rope (1) is wound around the winding shaft (3) after passing through the two sets of pulleys (10).

2. A pre-tensioning device for manufacturing a multi-layered wrapping container according to claim 1, characterized in that, The locking assembly includes two baffles (5) fixed on the winding shaft (3), with positioning holes (9) on the baffles (5) and pin holes (11) on the fixing frame (2). A pin is provided inside the pin hole (11) and the pin passes through the positioning holes (9) on the two baffles (5).

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