Reinforced spiral steel pipe

Abstract

The utility model belongs to the field of spiral steel pipes, and particularly relates to a reinforced spiral steel pipe which comprises a spiral steel pipe body and a lining pipe, flange plates are welded to the front end and the rear end of the spiral steel pipe body respectively, reinforcing ribs are welded to the outer side of the lining pipe body and make contact with the inner wall of the spiral steel pipe body, and installation rings are welded to the front end and the rear end of the lining pipe body respectively. And the mounting ring is slidably connected to the inner side of the flange plate, a locking pin is slidably connected to the interior of the mounting ring, the locking pin is connected with the flange plate in an inserted mode, and a guide rod is fixedly connected to the inner side of the mounting ring. The lining pipe is arranged on the inner side of the spiral steel pipe, the lining pipe can be made of Teflon or other corrosion-resistant materials, the end portion and the outer wall of the lining pipe are respectively provided with the installation ring and the reinforcing rib, the reinforcing rib abuts against the inner wall of the spiral steel pipe, and the installation ring is located at the position of the flange plate. Therefore, the spiral steel pipe can be supported from the inner side, and the structural strength and the corrosion resistance of the spiral steel pipe are enhanced.

Description

Technical Field

[0001] The utility model relates to the field of spiral steel pipes, in particular to a reinforced spiral steel pipe. Background Technique

[0002] Spiral steel pipes are made of strip steel coils, formed by extrusion at room temperature, and welded by an automatic double-wire double-sided submerged arc welding process into spiral-seam steel pipes. For example, the utility model patent with the authorization announcement number CN112393029B proposes a corrosion-resistant spiral steel pipe, which includes a steel pipe body, a protective layer is arranged on the outer wall of the body, and also includes a connecting pipe head and a self-locking mechanism. The connecting pipe head axially opens a cavity, and two sections of steel pipe bodies are respectively inserted at the two ends of the cavity. Shoulders are arranged on the peripheral wall of the pipe head and the corresponding peripheral wall of the body at the cavity openings, and sealing rings are arranged on the peripheral wall of the body end and the surface of the shoulder; the self-locking mechanism includes a stud, a lock nut and an unlocking column.

[0003] However, the existing spiral steel pipes are helical as a whole and are made by welding. Compared with seamless steel pipes, their structural strength is relatively low. Therefore, it needs to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a reinforced spiral steel pipe, which solves the problem of low structural strength of the existing spiral steel pipe.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A reinforced spiral steel pipe, including a spiral steel pipe and a lining pipe. Flange plates are welded at both the front and rear ends of the spiral steel pipe. Reinforcing ribs are welded on the outer side of the lining pipe, and the reinforcing ribs are in contact with the inner wall of the spiral steel pipe. Installation rings are welded at both the front and rear ends of the lining pipe, and the installation rings are slidably connected to the inner side of the flange plates. A locking pin is slidably connected inside the installation ring, the locking pin is inserted into the flange plate, a guide rod is fixedly connected to the inner side of the installation ring, and the guide rod is slidably connected to the locking pin. A spring is arranged inside the locking pin, a backing plate is fixedly connected to the lower section of the pin body of the locking pin, a rotating rod is rotatably connected inside the installation ring, a cam is fixedly connected to the end of the rotating rod located inside the installation ring, and the cam is in contact with the backing plate.

[0006] Preferably, the number of the reinforcing ribs is multiple and they are distributed in a circular array. Through the arrangement of the reinforcing ribs, the spiral steel pipe can be supported from the inside, thereby increasing the strength of the spiral steel pipe.

[0007] Preferably, one end of the spring is fixedly connected to the guide rod, and the other end of the spring is fixedly connected to the inner surface of the locking pin. Through the arrangement of the spring, elastic force can act on the locking pin, so that it is always inserted into the flange plate.

[0008] Preferably, a ball is provided on the upper section of the rod body of the guide rod, and the ball contacts the inner surface of the locking pin. By providing the ball, the relative frictional force between the locking pin and the guide rod can be reduced.

[0009] Preferably, one end of the rotating rod located outside the mounting ring is fixedly connected with a knob, and the knob is made of stainless steel. By providing the knob, it is convenient to rotate the rotating rod.

[0010] Preferably, two limiting rings are fixedly connected to the middle section of the rod body of the rotating rod, and the two limiting rings respectively contact the inner and outer surfaces of the mounting ring. By providing the limiting rings, a lateral limiting effect is exerted on the rotating rod.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By providing a lining pipe inside the spiral steel pipe in the present utility model, the lining pipe can be made of Teflon or other corrosion-resistant materials, and an installation ring and a reinforcing rib are respectively provided at the end and outer wall of the lining pipe. The reinforcing rib abuts against the inner wall of the spiral steel pipe, while the installation ring is located at the flange. In this way, the spiral steel pipe can be supported from the inside, enhancing its structural strength and corrosion resistance.

[0013] 2. By providing a locking pin elastically guided by a guide rod and a spring inside the mounting ring in the present utility model, the locking pin will be inserted into the flange under the elastic force of the spring. Then, by simply rotating the rotating rod, the cam at the end of the rotating rod rotates, so that the locking pin and the backing plate are forced to contract inward, and further the locking pin is separated from the flange. The disassembly and assembly of the lining pipe on the spiral steel pipe can be completed in one step, which is relatively convenient. Description of the Drawings

[0014] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0015] Figure 2 is the Figure 1 partial structural sectional three-dimensional view of the present utility model;

[0016] Figure 3 is the Figure 1 top view sectional view of the present utility model;

[0017] Figure 4 is the Figure 3 enlarged view of the structure of part A of the present utility model.

[0018] In the figure: 1, spiral steel pipe; 2, flange; 3, lining pipe; 4, reinforcing rib; 5, mounting ring; 6, locking pin; 7, guide rod; 8, ball; 9, spring; 10, backing plate; 11, rotating rod; 12, cam; 13, knob; 14, limiting ring. Detailed Embodiment

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-3 , a reinforced spiral steel pipe, including a spiral steel pipe 1 and an inner lining pipe 3. Flange plates 2 are welded to both the front and rear ends of the spiral steel pipe 1. Reinforcing ribs 4 are welded to the outer side of the inner lining pipe 3, and the reinforcing ribs 4 are in contact with the inner wall of the spiral steel pipe 1. The number of the reinforcing ribs 4 is multiple and they are distributed in a circular array. Through the arrangement of the reinforcing ribs 4, the spiral steel pipe 1 can be supported from the inside, thereby increasing the strength of the spiral steel pipe 1. Installation rings 5 are welded to both the front and rear ends of the inner lining pipe 3, and the installation rings 5 are slidably connected to the inner sides of the flange plates 2.

[0021] Please refer to Figure 3 , Figure 4 , a locking pin 6 is slidably connected inside the installation ring 5. The locking pin 6 is inserted into the flange plate 2. A guide rod 7 is fixedly connected to the inner side of the installation ring 5, and the guide rod 7 is slidably connected to the locking pin 6. A spring 9 is arranged inside the locking pin 6. One end of the spring 9 is fixedly connected to the guide rod 7, and the other end of the spring 9 is fixedly connected to the inner surface of the locking pin 6. Through the arrangement of the spring 9, elastic force can act on the locking pin 6 to make it always inserted into the flange plate 2. A backing plate 10 is fixedly connected to the lower section of the pin body of the locking pin 6.

[0022] Please refer to Figure 4 , a rotating rod 11 is rotatably connected inside the installation ring 5. A cam 12 is fixedly connected to one end of the rotating rod 11 located inside the installation ring 5, and the cam 12 is in contact with the backing plate 10. A ball 8 is arranged on the upper section of the rod body of the guide rod 7, and the ball 8 is in contact with the inner surface of the locking pin 6. Through the arrangement of the ball 8, the relative friction between the locking pin 6 and the guide rod 7 can be reduced. A knob 13 is fixedly connected to the end of the rotating rod 11 located outside the installation ring 5, and the knob 13 is made of stainless steel. Through the arrangement of the knob 13, it is convenient to rotate the rotating rod 11. Two limiting rings 14 are fixedly connected to the middle section of the rod body of the rotating rod 11, and the two limiting rings 14 are respectively in contact with the inner and outer surfaces of the installation ring 5. Through the arrangement of the limiting rings 14, a lateral limiting effect is exerted on the rotating rod 11.

[0023] The specific implementation process of the present utility model is as follows: When in use, first rotate the rotating rod 11 through the knob 13. The rotating rod 11 drives the cam 12 to rotate. During the rotation of the cam 12, a thrust is given to the backing plate 10, so that the locking pin 6 on the side of the backing plate 10 retracts into the mounting ring 5 and compresses the spring 9. Then, keep the state of the locking pin 6, and place the inner liner tube 3 into the spiral steel pipe 1. Then continue to rotate the rotating rod 11 so that the long end of the cam 12 is disengaged from the backing plate 10, thus removing the thrust on the backing plate 10. The locking pin 6 is reset under the elastic force of the spring 9 and inserted into the flange 2. In this way, the installation of the inner liner tube 3 is completed. At this time, the reinforcing rib 4 abuts against the inner wall of the spiral steel pipe 1, and the mounting ring 5 is placed in the flange 2. The inner liner tube 3 can be made of Teflon or corrosion-resistant material, which can provide support for the spiral steel pipe 1 from the inside and also provide corrosion resistance.

[0024] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A reinforced spiral steel pipe, comprising a spiral steel pipe (1) and a lining pipe (3), characterized in that: Flange plates (2) are welded to both the front and rear ends of the spiral steel pipe (1). Reinforcing ribs (4) are welded to the outer side of the inner lining pipe (3), and the reinforcing ribs (4) are in contact with the inner wall of the spiral steel pipe (1). Mounting rings (5) are welded to both the front and rear ends of the inner lining pipe (3), and the mounting rings (5) are slidably connected to the inner sides of the flange plates (2). A locking pin (6) is slidably connected to the inside of the mounting ring (5). The locking pin (6) is inserted into the flange plate (2). A guide rod (7) is fixedly connected to the inner side of the mounting ring (5), and the guide rod (7) is slidably connected to the locking pin (6). A spring (9) is arranged inside the locking pin (6). A backing plate (10) is fixedly connected to the lower section of the pin body of the locking pin (6). A rotating rod (11) is rotatably connected to the inside of the mounting ring (5). One end of the rotating rod (11) located inside the mounting ring (5) is fixedly connected to a cam (12), and the cam (12) is in contact with the backing plate (10).

2. The reinforced spiral steel pipe according to claim 1, wherein: The number of the reinforcing ribs (4) is multiple, and they are distributed in an annular array.

3. The reinforced spiral steel pipe according to claim 1, wherein: One end of the spring (9) is fixedly connected to the guide rod (7), and the other end of the spring (9) is fixedly connected to the inner surface of the locking pin (6).

4. The reinforced spiral steel pipe according to claim 1, wherein: Ball bearings (8) are arranged on the upper section of the rod body of the guide rod (7), and the ball bearings (8) are in contact with the inner surface of the locking pin (6).

5. The reinforced spiral steel pipe according to claim 1, characterized in that: One end of the rotating rod (11) located outside the mounting ring (5) is fixedly connected to a knob (13), and the knob (13) is made of stainless steel.

6. The reinforced spiral steel pipe according to claim 1, wherein: Two limiting rings (14) are fixedly connected to the middle section of the rod body of the rotating rod (11), and the two limiting rings (14) are respectively in contact with the inner and outer surfaces of the mounting ring (5).

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