Double-layer spiral welded pipe

Abstract

The invention discloses a double-layer spiral welded pipe, and relates to the technical field of spiral welded pipes. The double-layer spiral welded pipe comprises a first flange plate and a second flange plate which are fixedly connected to the two ends of a double-layer spiral welded pipe body, notches are formed in the side walls of the first flange plate and the second flange plate, and a plurality of first through holes formed in an array mode are formed in the end of the first flange plate. A plurality of second through holes arranged in an array mode are formed in the end of the second flange plate, a circular ring is detachably connected to the end of the second flange plate through a mounting mechanism, and the circular ring is arranged on the side wall of the double-layer spiral welded pipe body in a sleeving mode. According to the double-layer spiral welded pipe, the double-layer spiral welded pipe body can be conveniently placed, rolling can be avoided, the double-layer spiral welded pipe is more stable and reliable, meanwhile, the double-layer spiral welded pipe body can be conveniently stacked, and damage to the surface of the double-layer spiral welded pipe body can be avoided; and the double-layer spiral welded pipe body can be disassembled conveniently, and use is more convenient and faster.

Description

Technical Field

[0001] The invention relates to the technical field of spiral welded pipes, in particular to a double-layer spiral welded pipe. Background Art

[0002] Double-layer spiral welded pipe is a spiral steel pipe made by double-sided submerged arc welding technology. It has excellent properties such as high weld quality and strong pressure bearing capacity. Specifically, this steel pipe is made of strip steel, spirally formed by a forming machine, and then continuously welded by inner and outer double-sided submerged arc welding technology. The manufacturing process is highly automated and precisely controlled to ensure the quality and performance of the steel pipe. During the production process, the strip steel first undergoes strict material inspection and surface treatment, and then enters the pre-bending machine for pre-forming. Then, the strip steel enters the spiral forming unit and is gradually bent into a spiral shape through multiple rollers. At the same time, the inner and outer welding guns are simultaneously Submerged arc welding is performed in the next step to form a continuous spiral weld. The characteristics of the double-layer spiral welded pipe include high pressure bearing capacity, low resistance, low temperature resistance and corrosion resistance. Due to the double-sided submerged arc welding process, the weld quality is high, so it has a higher pressure bearing capacity. The inner wall of the steel pipe is smooth, and the resistance during fluid transportation is small, which can improve the transportation efficiency. At the same time, the steel pipe material has good low-temperature toughness and can maintain stable performance in a low temperature environment. In addition, according to user needs, the steel pipe can also be subjected to anti-corrosion treatment, such as galvanizing, painting, etc., to effectively resist the erosion of corrosive substances. In order to facilitate connection, flanges are usually fixed at both ends of the double-layer spiral welded pipe.

[0003] However, the existing double-layer spiral welded pipes are prone to rolling after being placed during use, and are not stable and reliable enough. At the same time, they are not convenient for stacking, and the surface of the double-layer spiral welded pipes is easily damaged during stacking. When connecting and fixing the double-layer spiral welded pipes, multiple bolts need to be tightened to fix the flange, and connection and disassembly are not convenient and quick enough. Summary of the invention

[0004] The object of the present invention is to provide a double-layer spiral welded pipe to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a double-layer spiral welded pipe, comprising a first flange and a second flange fixedly connected at both ends of the double-layer spiral welded pipe body, the side walls of the first flange and the second flange are both provided with notches, the end of the first flange is provided with a plurality of first through holes arranged in an array, and the end of the second flange is provided with a plurality of second through holes arranged in an array, the end of the second flange is detachably connected to a ring through a mounting mechanism, and the ring is sleeved on the side wall of the double-layer spiral welded pipe body, the side wall of the ring is fixedly connected to a conical cover, and the side wall of the conical cover is connected to a movable ring through a movable mechanism, the end of the movable ring is fixedly connected to a plurality of connecting rods arranged in an array, the connecting rods pass through the ring and are inserted into the second through holes, and a tightening mechanism is provided at the end of each connecting rod.

[0006] Preferably, the mounting mechanism includes a first annular groove formed at the end of the second flange, and a second annular groove formed at the end of the circular ring, and annular magnets are fixedly inserted in the first annular groove and the second annular groove, and the two magnets are arranged opposite to each other at different poles.

[0007] Preferably, the abutting mechanism comprises a stopper, and the stopper comprises a plane, and the stopper is connected to the end of the connecting rod via a moving assembly.

[0008] Preferably, the moving assembly includes a fixed block fixedly connected to the end of the connecting rod, and two symmetrically arranged guide rods are inserted into the side wall of the fixed block, one end of the guide rod is fixed to the side wall of the block, and the other end of the guide rod is fixedly connected to the moving block, a reset member is arranged between the guide rod and the block, and the movement of the moving block is driven by a first pushing mechanism.

[0009] Preferably, the reset member comprises a spring sleeved on the side wall of each guide rod, and two ends of the spring are respectively fixed to the side wall of the stop block and the fixed block.

[0010] Preferably, the first pushing mechanism includes a strip opening opened at the end of the connecting rod, and the other end of the strip opening is arranged through the end of the movable ring, a sliding plate is slidably connected in the strip opening, and the sliding plate is fixed to the side wall of the movable block, a pushing rod is fixedly connected to the side wall of the sliding plate, and the movement of the pushing rod is pushed by the second pushing mechanism.

[0011] Preferably, the second pushing mechanism comprises a plurality of mounting blocks arranged in an array and fixedly connected to the end of the circular ring, and a protrusion is fixedly connected to the side wall of the mounting block.

[0012] Preferably, the moving mechanism includes a connecting plate fixedly connected to the side wall of the conical cover, and the side wall of the connecting plate is rotatably connected to a threaded rod, the side wall of the threaded rod is threadedly connected to a threaded tube, and the other end of the threaded tube is fixed to the end of the moving ring, and a guiding mechanism is arranged between the connecting plate and the moving ring.

[0013] Preferably, the guide mechanism comprises two symmetrically arranged sleeve rods fixedly connected to the side wall of the connecting plate, the side wall of each sleeve rod is sleeved with a sleeve, and the other end of the sleeve is fixed to the end of the movable ring.

[0014] Preferably, the end of the threaded rod is provided with a hexagon socket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This type of double-layer spiral welded pipe, by providing an installation mechanism, etc., is convenient for placing the double-layer spiral welded pipe body under the action of the notch, can avoid rolling, and is more stable and reliable. When the double-layer spiral welded pipe body needs to be stacked, the first flange of the upper double-layer spiral welded pipe body can be slid downward along the side wall of the conical cover, thereby pushing the conical cover and the ring to move away from the second flange, so that the first flange can be moved between the second flange and the ring, and the notch at the bottom of the first flange can be placed on the connecting rod, thereby facilitating the stacking of the double-layer spiral welded pipe body and avoiding damage to the surface of the double-layer spiral welded pipe body.

[0017] (2) This double-layer spiral welded pipe is provided with a tightening mechanism and a moving mechanism. When it is necessary to connect and fix two double-layer spiral welded pipe bodies, the connecting rod is inserted into the first through hole of the other double-layer spiral welded pipe body. Then, the threaded rod is rotated by an electric wrench or the like through the hexagon socket. Under the action of the guide mechanism, the moving ring moves toward the direction close to the connecting plate, and at the same time, drives multiple connecting rods to move synchronously. When the push rod is disengaged from the protrusion, the moving block can move toward the fixed block under the action of the spring. At the same time, the stopper is driven to move away from the fixed block through the guide rod. When the moving ring continues to move, it can drive multiple connecting rods to move synchronously, and drive the stopper to move, and make the plane abut against the side wall of the first flange. The ends of the first flange and the second flange are abutted against each other, so that the connection and fixation of the two double-layer spiral welded pipe bodies are achieved, which is convenient for connecting and fixing the double-layer spiral welded pipe bodies. When the two double-layer spiral welded pipe bodies need to be disassembled, the threaded rod is reversed to make the movable ring move in the direction away from the connecting plate, and drive the connecting rod to move synchronously, so that the first flange and the second flange are gradually loosened. When the end of the push rod abuts against the side wall of the protrusion, the movable block can be driven by the sliding plate to move in the direction away from the fixed block. At the same time, the spring is compressed, and the stop block is driven by the guide rod to move and reset in the direction close to the fixed block, so that the first flange and the second flange can be separated, thereby facilitating the disassembly of the two double-layer spiral welded pipe bodies, which is more convenient and quick to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the stacking state of the present invention;

[0020] Figure 3 It is a schematic diagram of the overall structure from another perspective of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the guide mechanism in the present invention;

[0022] Figure 5 It is a partial cross-sectional structural schematic diagram of the present invention;

[0023] Figure 6 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 7 for Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 8 for Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0026] Fig. 9 for Figure 5 Schematic diagram of the enlarged structure at D in the middle.

[0027] In the figure: 1. double-layer spiral welded pipe body; 101. first flange; 102. second flange; 201. stopper; 202. plane; 301. guide rod; 302. fixed block; 303. moving block; 401. strip opening; 402. sliding plate; 403. pushing rod; 501. mounting block; 502. protrusion; 601. first annular groove; 602. second annular groove; 603. magnet; 701. connecting plate; 702. threaded pipe; 703. threaded rod; 801. sleeve; 802. sleeve rod; 9. hexagon socket; 10. spring; 11. notch; 12. first through hole; 13. second through hole; 14. circular ring; 15. conical cover; 16. moving ring; 17. connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 9 The present invention provides a technical solution: a double-layer spiral welded pipe, comprising a first flange 101 and a second flange 102 fixedly connected at both ends of a double-layer spiral welded pipe body 1, the side walls of the first flange 101 and the second flange 102 are both provided with a notch 11, the end of the first flange 101 is provided with a plurality of first through holes 12 arranged in an array, and the end of the second flange 102 is provided with a plurality of second through holes 13 arranged in an array, the end of the second flange 102 is detachably connected with a ring 14 through a mounting mechanism, and the ring 14 is sleeved on the side wall of the double-layer spiral welded pipe body 1, and the side wall of the ring 14 is fixed A conical cover 15 is connected, and the side wall of the conical cover 15 is connected to a moving ring 16 through a moving mechanism. The end of the moving ring 16 is fixedly connected to a plurality of connecting rods 17 arranged in an array. The connecting rods 17 pass through the circular ring 14 and are inserted in the second through hole 13, and a tightening mechanism is provided at the end of each connecting rod 17, which is convenient for placing the double-layer spiral welded pipe body 1 and can avoid rolling, making it more stable and reliable. At the same time, it is convenient for stacking the double-layer spiral welded pipe body 1 and can avoid damage to the surface of the double-layer spiral welded pipe body 1; it is convenient for disassembling the double-layer spiral welded pipe body 1 and is more convenient and quick to use.

[0030] The mounting mechanism includes a first annular groove 601 opened at the end of the second flange 102, and a second annular groove 602 is opened at the end of the ring 14, and annular magnets 603 are fixedly inserted in the first annular groove 601 and the second annular groove 602, and the two magnets 603 are arranged opposite to each other at different levels, so as to adsorb the ring 14 on the second flange 102.

[0031] The tightening mechanism includes a stopper 201, and the stopper 201 includes a plane 202. The stopper 201 is connected to the end of the connecting rod 17 through a moving component. When it is necessary to connect and fix the two double-layer spiral welded pipe bodies 1, the connecting rod 17 is inserted into the first through hole 12 of the other double-layer spiral welded pipe body 1. Then, the moving ring 16 is moved in a direction close to the connecting plate 701 through the moving mechanism, and at the same time, it drives multiple connecting rods 17 to move synchronously. At the same time, under the action of the moving component, the stopper 201 extends outward. When the moving ring 16 continues to move, it can drive multiple connecting rods 17 to move synchronously, and drive the stopper 201 to move, and make the plane 202 abut against the side wall of the first flange 101, so that the end of the first flange 101 and the end of the second flange 102 abut against each other, thereby realizing the connection and fixation of the two double-layer spiral welded pipe bodies 1, thereby facilitating the connection and fixation of the double-layer spiral welded pipe bodies 1.

[0032] The moving assembly includes a fixed block 302 fixedly connected to the end of the connecting rod 17, and two symmetrically arranged guide rods 301 are inserted into the side wall of the fixed block 302, one end of the guide rod 301 is fixed to the side wall of the stop block 201, and the other end of the guide rod 301 is fixedly connected to a moving block 303, a reset member is arranged between the guide rod 301 and the stop block 201, and the movement of the moving block 303 is driven by a first pushing mechanism, and the moving block 303 is pushed by the first pushing mechanism to move in a direction away from the fixed block 302.

[0033] The reset member includes a spring 10 sleeved on the side wall of each guide rod 301 , and both ends of the spring 10 are respectively fixed to the stopper 201 and the side wall of the fixed block 302 , so as to guide and reset the movement of the moving block 303 .

[0034] The first pushing mechanism includes a strip opening 401 opened at the end of the connecting rod 17, and the other end of the strip opening 401 is arranged to pass through the end of the movable ring 16, a sliding plate 402 is slidably connected in the strip opening 401, and the sliding plate 402 is fixed to the side wall of the movable block 303, a pushing rod 403 is fixedly connected to the side wall of the sliding plate 402, and the movement of the pushing rod 403 is pushed by the second pushing mechanism, and the pushing rod 403 is pushed to move by the second pushing mechanism, and at the same time, the movable block 303 is driven to move in a direction away from the fixed block 302 by the sliding plate 402.

[0035] The second pushing mechanism includes a plurality of mounting blocks 501 arranged in an array and fixedly connected to the end of the circular ring 14, and a protrusion 502 is fixedly connected to the side wall of the mounting block 501. When the end of the pushing rod 403 abuts against the side wall of the protrusion 502, the moving block 303 can be driven to move away from the fixed block 302 through the sliding plate 402.

[0036] The moving mechanism includes a connecting plate 701 fixedly connected to the side wall of the conical cover 15, and the side wall of the connecting plate 701 is rotatably connected to a threaded rod 703, the side wall of the threaded rod 703 is threadedly connected to a threaded tube 702, and the other end of the threaded tube 702 is fixed to the end of the moving ring 16, and a guiding mechanism is arranged between the connecting plate 701 and the moving ring 16 to rotate the threaded rod 703. Under the action of the guiding mechanism, the moving ring 16 moves and drives multiple connecting rods 17 to move synchronously.

[0037] The guiding mechanism includes two symmetrically arranged sleeve rods 802 fixedly connected to the side wall of the connecting plate 701. The side wall of each sleeve rod 802 is sleeved with a sleeve 801, and the other end of the sleeve 801 is fixed to the end of the moving ring 16, which guides the movement of the moving ring 16.

[0038] The end of the threaded rod 703 is provided with a hexagon socket 9, and the threaded rod 703 is rotated through the hexagon socket 9 using an electric wrench or the like.

[0039] Working principle: When in use, under the action of the notch 11, it is convenient to place the double-layer spiral welded pipe body 1, which can avoid rolling and is more stable and reliable. When the double-layer spiral welded pipe body 1 needs to be stacked, the first flange 101 of the upper double-layer spiral welded pipe body 1 can be slid downward along the side wall of the conical cover 15, so as to push the conical cover 15 and the ring 14 to move away from the second flange 102, so that the first flange 101 can be moved between the second flange 102 and the ring 14, and the notch 11 at the bottom of the first flange 101 can be placed on the connecting rod 17, so as to facilitate the stacking of the double-layer spiral welded pipe body 1, and at the same time, it can avoid damage to the surface of the double-layer spiral welded pipe body 1;

[0040] When it is necessary to connect and fix two double-layer spiral welded pipe bodies 1, the connecting rod 17 is inserted into the first through hole 12 of the other double-layer spiral welded pipe body 1, and then, the threaded rod 703 is rotated by the inner hexagon 9 using an electric wrench, and under the action of the guide mechanism, the movable ring 16 moves toward the direction close to the connecting plate 701, and at the same time, drives multiple connecting rods 17 to move synchronously. When the push rod 403 is disengaged from the protrusion 502, the movable block 303 can move toward the direction close to the fixed block 302 under the action of the spring 10, and at the same time, the stopper 201 is driven to move in the direction away from the fixed block 302 through the guide rod 301;

[0041] When the moving ring 16 continues to move, it can drive the multiple connecting rods 17 to move synchronously, and drive the stopper 201 to move, so that the plane 202 abuts against the side wall of the first flange 101, so that the end of the first flange 101 and the end of the second flange 102 abut against each other, so as to realize the connection and fixation of the two double-layer spiral welded pipe bodies 1, thereby facilitating the connection and fixation of the double-layer spiral welded pipe bodies 1;

[0042] When it is necessary to disassemble the two double-layer spiral welded pipe bodies 1, the threaded rod 703 is reversed to make the movable ring 16 move away from the connecting plate 701, and drive the connecting rod 17 to move synchronously, thereby gradually loosening the first flange 101 and the second flange 102. When the end of the push rod 403 abuts against the side wall of the protrusion 502, the movable block 303 can be driven by the sliding plate 402 to move away from the fixed block 302. At the same time, the spring 10 is compressed, and the stop block 201 is driven by the guide rod 301 to move and reset in the direction close to the fixed block 302, so that the first flange 101 can be separated from the second flange 102, thereby facilitating the disassembly of the two double-layer spiral welded pipe bodies 1 and making it more convenient and quick to use.

Claims

1. A double-layer spiral welded pipe, comprising a first flange (101) and a second flange (102) fixedly connected to both ends of a double-layer spiral welded pipe body (1), the side walls of the first flange (101) and the second flange (102) are both provided with a notch (11), the end of the first flange (101) is provided with a plurality of first through holes (12) arranged in an array, and the end of the second flange (102) is provided with a plurality of second through holes (13) arranged in an array, characterized in that: The end of the second flange (102) is detachably connected to a circular ring (14) via a mounting mechanism, and the circular ring (14) is sleeved on the side wall of the double-layer spiral welded pipe body (1), the side wall of the circular ring (14) is fixedly connected to a conical cover (15), and the side wall of the conical cover (15) is connected to a movable ring (16) via a movable mechanism, the end of the movable ring (16) is fixedly connected to a plurality of connecting rods (17) arranged in an array, the connecting rods (17) pass through the circular ring (14) and are inserted into the second through hole (13), and a tightening mechanism is provided at the end of each connecting rod (17).

2. A double-layer spiral welded pipe according to claim 1, characterized in that: The mounting mechanism comprises a first annular groove (601) formed at the end of the second flange (102), and a second annular groove (602) is formed at the end of the circular ring (14), and annular magnets (603) are fixedly inserted in the first annular groove (601) and the second annular groove (602), and the two magnets (603) are arranged opposite to each other at different levels.

3. A double-layer spiral welded pipe according to claim 1, characterized in that: The abutting mechanism comprises a stopper (201), and the stopper (201) comprises a plane (202), and the stopper (201) is connected to the end of the connecting rod (17) via a moving assembly.

4. A double-layer spiral welded pipe according to claim 3, characterized in that: The moving assembly comprises a fixed block (302) fixedly connected to the end of the connecting rod (17), and two symmetrically arranged guide rods (301) are inserted into the side wall of the fixed block (302), one end of the guide rod (301) is fixed to the side wall of the stopper (201), and the other end of the guide rod (301) is fixedly connected to the moving block (303), a reset member is arranged between the guide rod (301) and the stopper (201), and the movement of the moving block (303) is driven by a first driving mechanism.

5. A double-layer spiral welded pipe according to claim 4, characterized in that: The reset member comprises a spring (10) sleeved on the side wall of each guide rod (301), and two ends of the spring (10) are respectively fixed to the side wall of the stop block (201) and the fixed block (302).

6. The double-layer spiral welded pipe according to claim 3, characterized in that: The first pushing mechanism comprises a strip opening (401) opened at the end of the connecting rod (17), and the other end of the strip opening (401) is arranged to pass through the end of the moving ring (16), a sliding plate (402) is slidably connected in the strip opening (401), and the sliding plate (402) is fixed to the side wall of the moving block (303), the side wall of the sliding plate (402) is fixedly connected to the pushing rod (403), and the movement of the pushing rod (403) is driven by the second pushing mechanism.

7. A double-layer spiral welded pipe according to claim 6, characterized in that: The second pushing mechanism comprises a plurality of mounting blocks (501) arranged in an array and fixedly connected to the end of the circular ring (14), and a protrusion (502) is fixedly connected to the side wall of the mounting block (501).

8. The double-layer spiral welded pipe according to claim 1, characterized in that: The moving mechanism comprises a connecting plate (701) fixedly connected to the side wall of the conical cover (15), and the side wall of the connecting plate (701) is rotatably connected to a threaded rod (703), the side wall of the threaded rod (703) is threadedly connected to a threaded tube (702), and the other end of the threaded tube (702) is fixed to the end of the moving ring (16), and a guiding mechanism is provided between the connecting plate (701) and the moving ring (16).

9. The double-layer spiral welded pipe according to claim 8, characterized in that: The guide mechanism comprises two symmetrically arranged sleeve rods (802) fixedly connected to the side wall of the connecting plate (701), the side wall of each sleeve rod (802) being sleeved with a sleeve (801), and the other end of the sleeve (801) being fixed to the end of the moving ring (16).

10. The double-layer spiral welded pipe according to claim 8, characterized in that: The end of the threaded rod (703) is provided with a hexagon socket (9).

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