Small-diameter high-strength spiral welded pipe

Abstract

The utility model relates to the technical field of spiral welded pipes, in particular to a small-diameter high-strength spiral welded pipe. The small-diameter high-strength spiral welded pipe comprises an outer barrel pipe and an inner barrel pipe inserted into the outer barrel pipe. A spiral ridge which is spirally arranged is fixedly embedded in the outer tube wall of the outer tube; and a steel ball is embedded on the inner tube wall of the inner tube. According to the small-diameter high-strength spiral welded pipe, a double-layer structure of the outer barrel pipe and the inner barrel pipe is adopted, and the outer barrel pipe and the inner barrel pipe are connected through the T-shaped connecting column, so that the connecting strength between the outer barrel pipe and the inner barrel pipe can be guaranteed, the strength of the whole spiral welded pipe is improved on the whole, and the service life of the spiral welded pipe is prolonged; when the spiral welded pipe is pre-embedded in the concrete, the spiral edges arranged on the outer cylinder pipe enable the outer cylinder pipe to have the function of a steel bar, the outer cylinder pipe can be used for supporting the internal structure of the concrete, and materials can also pass through the spiral welded pipe, so that material waste is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of spiral welded pipes, in particular to a small-diameter high-strength spiral welded pipe. Background Art

[0002] Spiral welded pipe is made by rolling low-carbon carbon structural steel or low-alloy structural steel strip into a tube blank at a certain spiral angle (called forming angle), and then welding the tube seam together. It can produce large-diameter steel pipes with narrower strip steel. The welded pipe should ensure that the water pressure test, tensile strength of the weld and cold bending performance meet the requirements.

[0003] Small diameter spiral welded pipes have been widely used in various industries due to their excellent performance in many aspects. Usually, small diameter spiral pipes are buried underground to transmit tap water or oil, etc. Due to excessive pressure in the pipe during use, the pipe will vibrate, which will cause serious damage to the pipe if it continues for a long time.

[0004] Therefore, it is necessary to provide a new small-diameter high-strength spiral welded pipe to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a small-diameter high-strength spiral welded pipe.

[0006] The small-diameter high-strength spiral welded pipe provided by the utility model comprises:

[0007] outer tube, and

[0008] An inner tube inserted into the outer tube;

[0009] The outer tube wall of the outer tube is fixedly fitted with a spiral rib, and the inner tube wall of the outer tube is provided with a plurality of annularly distributed and axially arranged T-shaped grooves;

[0010] A plurality of evenly distributed steel balls are embedded on the inner tube wall of the inner tube, and a plurality of annularly distributed and axially arranged T-shaped connecting columns are fixedly embedded on the outer tube wall of the inner tube;

[0011] The T-shaped connecting column on the inner tube is inserted into the T-shaped slot provided on the outer tube and is fixedly connected to the T-shaped slot.

[0012] Preferably, a ball groove is provided on the inner tube wall of the inner tube, and the steel ball is embedded in the ball groove and rotatably connected to the ball groove.

[0013] Preferably, one third of the sphere of the steel ball extends out of the ball groove.

[0014] Compared with the related art, the small diameter high strength spiral welded pipe provided by the utility model has the following beneficial effects:

[0015] 1. The spiral welded pipe in the utility model adopts a double-layer structure of an outer tube and an inner tube, and is connected by a T-shaped connecting column, which can ensure the connection strength between the outer tube and the inner tube, thereby improving the strength of the overall spiral welded pipe as a whole and increasing the service life of the spiral welded pipe;

[0016] 2. When the spiral welded pipe of the utility model is pre-buried in concrete, the spiral ridges arranged on the outer tube make the outer tube also serve as steel bars, which can be used to support the internal structure of the concrete and also allow materials to pass through the spiral welded pipe to avoid material waste. The steel balls in the inner tube can reduce the water hammer effect on the spiral welded pipe caused by the material passing through the spiral welded pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a preferred embodiment of a small-diameter high-strength spiral welded pipe provided by the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the outer tube shown;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the inner tube shown.

[0020] Numbers in the figure: 1, outer tube; 1a, T-slot; 2, inner tube; 3, spiral rib; 4, steel ball; 5, T-connecting column. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0023] See also Figures 1 to 3 The utility model provides a small-diameter high-strength spiral welded pipe in an embodiment, and the small-diameter high-strength spiral welded pipe includes: an outer tube 1 and an inner tube 2.

[0024] In the embodiments of the present invention, please refer to Figure 1 , Figure 2 and Figure 3The inner tube 2 is inserted into the outer tube 1. Specifically, the inner tube wall of the outer tube 1 is provided with a plurality of annularly distributed and axially arranged T-shaped grooves 1a, and the outer tube wall of the inner tube 2 is fixedly fitted with a plurality of annularly distributed and axially arranged T-shaped connecting columns 5, and the T-shaped connecting columns 5 on the inner tube 2 are inserted into the T-shaped grooves 1a provided on the outer tube 1 and fixedly connected to the T-shaped grooves 1a;

[0025] A spiral rib 3 is fixedly embedded on the outer tube wall of the outer tube 1, and a number of evenly distributed steel balls 4 are embedded on the inner tube wall of the inner tube 2. A ball groove is opened on the inner tube wall of the inner tube 2, and the steel ball 4 is embedded in the ball groove and rotatably connected to the ball groove, and one third of the sphere of the steel ball 4 extends out of the ball groove.

[0026] It should be noted that the spiral welded pipe in the present application adopts a double-layer structure of an outer tube 1 and an inner tube 2, and is connected by a T-shaped connecting column 5, which can ensure the connection strength between the outer tube 1 and the inner tube 2, thereby improving the strength of the overall spiral welded pipe as a whole and increasing the service life of the spiral welded pipe;

[0027] When the spiral welded pipe is embedded in concrete, the spiral ribs 3 on the outer tube 1 allow the outer tube 1 to also serve as reinforcement, which can be used to support the internal structure of the concrete and also allow materials to pass through the spiral welded pipe to avoid material waste. The steel balls 4 in the inner tube 2 can reduce the water hammer effect on the spiral welded pipe when the material passes through the spiral welded pipe.

[0028] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A small diameter high strength spiral welded pipe, characterized in that: include: an outer tube (1), and An inner tube (2) inserted into the outer tube (1); The outer tube wall of the outer tube (1) is fixedly fitted with a spiral corrugation (3) arranged in a spiral manner, and the inner tube wall of the outer tube (1) is provided with a plurality of annularly distributed and axially arranged T-shaped grooves (1a); A plurality of uniformly distributed steel balls (4) are embedded on the inner tube wall of the inner tube (2), and a plurality of annularly distributed and axially arranged T-shaped connecting columns (5) are fixedly embedded on the outer tube wall of the inner tube (2); The T-shaped connecting column (5) on the inner tube (2) is inserted into a T-shaped groove (1a) provided on the outer tube (1) and is fixedly connected to the T-shaped groove (1a).

2. The small-diameter high-strength spiral welded pipe according to claim 1, characterized in that: A ball groove is provided on the inner tube wall of the inner tube (2), and the steel ball (4) is embedded in the ball groove and rotatably connected to the ball groove.

3. The small-diameter high-strength spiral welded pipe according to claim 2, characterized in that: One third of the sphere of the steel ball (4) extends out of the ball groove.

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