A spiral winding device

Abstract

The present invention relates to a spiral winding device, which includes a spiral winding machine and an outer cylinder. The outer cylinder is mounted on the main body of the spiral winding machine, and a gap is left between the outer cylinder and the main body of the spiral winding machine for a tube blank to pass through. The inner wall of the outer cylinder is provided with a spiral groove, i.e., an internal thread; the outer periphery of the tube blank is provided with a spiral rib, i.e., an external thread, and the spiral rib is formed by a convex strip arranged on a plate and spirally wound together with the plate. The principle of thread matching is cleverly applied to the process of spiral winding of the plate, and the force of the spiral winding machine to transport the tube blank forward is converted into a radial force applied to the joint of the tube blank. Under the extrusion of this radial force, the joint of the tube blank is forced to be in close contact.

Description

Technical Field

[0001] The invention relates to a municipal drainage pipe, in particular to a spiral winding device. Background Art

[0002] Traditional spirally wound pipes are prone to cracking during use. Studies have found that the cracks are located at the joints. Traditional spirally wound pipes only treat the joints by hot-pressing welding or glue injection. Relatively speaking, the joints are relatively weak and are more likely to crack when under pressure.

[0003] At present, there are some explorations in the industry on how to strengthen the joints of spirally wound pipes:

[0004] For example, the spirally wound pipe and spirally wound pipe assembly (patent number: 201120488497.8) are designed with tenon-shaped flanges and wedge-shaped grooves, supplemented by melting fixation, to form a firm "integrated" structure, making the adjacent spirally wound pipes more firmly connected. It discloses a structure, such as Figure 1 As shown, the tenon flange and the wedge-shaped groove are axially matched, and the two are merely interlocked, which cannot effectively limit the axial displacement of the tube blank. Moreover, for automated spiral winding, how to insert the tenon flange into the wedge-shaped groove is also a problem that needs to be solved. The traditional spiral winding machine is obviously unable to achieve this. The above technical solution also only implicitly mentions "mechanical interlocking". Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a spiral winding device, which applies radial force when spirally winding a plate into a tube billet, forcing the joints of the tube billet to be in close contact.

[0006] The technical solution of the present invention:

[0007] A spiral winding device, the spiral winding device is used to spirally wind a plate into a tube blank; the spiral winding device comprises a spiral winding machine; the spiral winding device also comprises an outer cylinder, the outer cylinder is sleeved on the main body of the spiral winding machine, and a gap is left between the outer cylinder and the main body of the spiral winding machine for the tube blank to pass through, and the inner wall of the outer cylinder is provided with a spiral groove, i.e., an internal thread;

[0008] The outer periphery of the tube blank is provided with spiral ribs, i.e., external threads, and the spiral ribs are formed by convex strips arranged on the plate and spirally wound together with the plate;

[0009] The sheet is spirally wound into a tube by a spiral winding machine. The tube is sleeved on the main body of the spiral winding machine, rotated and transported forward. When it passes through the gap between the outer cylinder and the main body of the spiral winding machine, the internal thread on the inner wall of the outer cylinder matches the external thread on the outer circumference of the tube. The outer cylinder is fixed and a radial force is formed between the two. Under the extrusion of the radial force, the joints of the tube are in close contact.

[0010] A protrusion is arranged on one side of the plate, and a groove is arranged on the other side; when the plate is spirally wound into a tube blank, the protrusion is inserted into the groove and connected with the groove under the extrusion of radial force.

[0011] The protrusion is buckled with the groove; the buckling surface of the two is a plane perpendicular to the tube blank.

[0012] (The main body of the spiral winding machine includes a plurality of winding rollers, which are arranged in a circle to form a circumferential surface, and the tube blank is wound on the circumferential surface; each winding roller is connected to a driving device, and is driven by the driving device to rotate synchronously in the same direction; the driving device is composed of a motor and a sprocket, which are connected.)

[0013] The advantages of the present invention are reasonable design and simple structure. The principle of thread matching is cleverly applied to the process of spiral winding of the plate. The force of the spiral winding machine to transport the tube blank forward is converted into a radial force applied to the joint of the tube blank. Under the extrusion of this radial force, the protrusion is forced to insert into the groove; and the structure of the protrusion and the groove is optimized so that the protrusion and the groove are buckled. In this way, the axial and radial displacement of the tube blank can be effectively limited, and the finished spirally wound tube is less likely to crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the joint of the existing spirally wound pipe blank (the tenon-shaped flange is embedded in the wedge-shaped groove).

[0015] Figure 2 It is a schematic diagram of the use of spiral winding equipment.

[0016] Figure 3 It is a schematic diagram of the tube billet structure.

[0017] Figure 4 It is a schematic diagram of a half section of the outer cylinder.

[0018] Figure 5 It is a schematic diagram of the connection at the joint of the tube blank.

[0019] In the figure, a plate 1, a protrusion 1-1, a groove 1-2, a convex strip 1-3, a tube blank 2, an external thread 2-1, a spiral winding machine 3, an external cylinder 4, and an internal thread 4-1. DETAILED DESCRIPTION

[0020] like Figure 2-5As shown, a spiral winding device is used to spirally wind a plate 1 into a tube 2; the spiral winding device comprises a spiral winding machine 3; the spiral winding device also comprises an outer cylinder 4, the outer cylinder 4 is sleeved on the main body of the spiral winding machine 3, and a gap is left between the outer cylinder 4 and the main body of the spiral winding machine 3 for the tube 2 to pass through, and the inner wall of the outer cylinder 4 is provided with a spiral groove, that is, an internal thread 4-1;

[0021] The outer periphery of the tube blank 2 is provided with spiral ribs, namely external threads 2-1, and the spiral ribs are formed by convex strips 1-1 provided on the plate 1 and spirally wound together with the plate 1;

[0022] The sheet 1 is spirally wound into a tube blank 2 by a spiral winding machine 3. The tube blank 2 is sleeved on the main body of the spiral winding machine 3, rotated and transported forward. When it passes through the gap between the outer cylinder 4 and the main body of the spiral winding machine 3, the internal thread 4-1 on the inner wall of the outer cylinder 4 matches with the external thread 2-1 on the outer circumference of the tube blank 2. The outer cylinder 4 is fixed and a radial force is formed between the two. Under the extrusion of the radial force, the joint of the tube blank 2 is in close contact.

[0023] The plate 1 is provided with a protrusion 1-2 on one side and a groove 1-3 on the other side; when the plate 1 is spirally wound into a tube blank 2, the protrusion 1-2 is inserted into the groove 1-3 and connected thereto under the extrusion of radial force;

[0024] The protrusion 1-2 is buckled with the groove 1-3; the buckling surface of the two is a plane perpendicular to the tube blank 2.

[0025] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spiral winding device, the spiral winding device is used to spirally wind a plate into a tube blank; the spiral winding device comprises a spiral winding machine; It is characterized in that The spiral winding device also includes an outer cylinder, which is sleeved on the main body of the spiral winding machine, with a gap between the outer cylinder and the main body of the spiral winding machine for the tube blank to pass through, and the inner wall of the outer cylinder is provided with a spiral groove, i.e., an internal thread; The outer periphery of the tube blank is provided with spiral ribs, i.e., external threads, and the spiral ribs are formed by convex strips arranged on the plate and spirally wound together with the plate; The plate is spirally wound into a tube blank by a spiral winding machine. The tube blank is sleeved on the main body of the spiral winding machine, rotated and transported forward. When it passes through the gap between the outer cylinder and the main body of the spiral winding machine, the internal thread on the inner wall of the outer cylinder matches the external thread on the outer circumference of the tube blank. The outer cylinder is fixed and a radial force is formed between the two. Under the extrusion of the radial force, the joint of the tube blank is in close contact; The main body of the spiral winding machine includes a plurality of winding rollers, which are arranged in a circle to form a circumferential surface, and the tube blank is wound on the circumferential surface; each winding roller is connected to a driving device respectively, and is driven by the driving device to rotate synchronously in the same direction; the driving device is composed of a motor and a sprocket, and a connection.

2. A spiral winding device according to claim 1, It is characterized in that A protrusion is arranged on one side of the plate, and a groove is arranged on the other side; when the plate is spirally wound into a tube blank, the protrusion is inserted into the groove and connected with the groove under the extrusion of radial force.

3. A spiral winding device according to claim 2, It is characterized in that The protrusion is buckled with the groove; the buckling surface of the two is a plane perpendicular to the tube blank.

Images