Large-diameter pipeline preheating device

Abstract

The utility model discloses a large-diameter pipeline preheating device. When a large-diameter pipeline is preheated, a plurality of ceramic heating pieces need to be connected and wound on the surface of the pipeline by a circle, two to three persons need to cooperate with each other to complete preheating, operation is inconvenient, and labor intensity is large. The burner comprises a circular ring gas pipe, a plurality of evenly-arranged flame nozzles (14) are fixed to the outer ring circumferential face of the circular ring gas pipe, two symmetrically-arranged U-shaped rods (5) are fixed to the upper portion and the lower portion of the circular ring gas pipe respectively, and supporting wheels (6) are fixed to the rod heads of the two U-shaped rods located on the upper side respectively. Universal wheels (13) are fixed to the rod heads of the two U-shaped rods located on the lower side respectively. An air inlet head (2) is arranged on the annular air pipe, the air inlet head is connected with a connecting hose (3), the connecting hose is connected to a distributor (1), and an air inlet end of the distributor is connected with an air inlet connecting pipe (11). The large-diameter pipeline preheating device is used for preheating large-diameter pipelines.

Description

Technical Field

[0001] The utility model relates to a large-diameter pipeline preheating device. Background Art

[0002] In the welding process of pipeline factory prefabrication, preheating of pipeline before welding is an essential process. At present, there are many ways to heat pipeline prefabrication, such as thermal oil heating, steam boiler heating, electric heating wire heating, electromagnetic heater heating, etc.

[0003] At present, factory-made pipeline prefabrication mostly adopts ceramic sheet electric heating for preheating. When preheating large-diameter pipelines, multiple ceramic heating sheets need to be connected and wrapped around the surface of the pipeline. Due to the large diameter of the pipeline, multiple ceramic sheets are heavy after being connected, and it requires two to three people to cooperate with each other to complete it. The operation is inconvenient and the labor intensity is high. Utility Model Content

[0004] The utility model aims at solving the problems existing in the prior art and provides a large-diameter pipeline preheating device.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A large-diameter pipeline preheating device, comprising a circular air pipe, a plurality of uniformly arranged flame spray nozzles are fixed on the outer circumferential surface of the circular air pipe, two symmetrically arranged U-shaped rods are fixed above and below the circular air pipe, support wheels are fixed at the rod heads of the two U-shaped rods on the upper side, and universal wheels are fixed at the rod heads of the two U-shaped rods on the lower side;

[0007] The circular air pipe is provided with an air inlet head, the air inlet head is connected to a connecting hose, the connecting hose is connected to a distributor, and the air inlet end of the distributor is connected to an air inlet connecting pipe.

[0008] The large-diameter pipeline preheating device, the circular air pipe includes an upper semicircular air pipe and a lower semicircular air pipe, the ends of the upper semicircular air pipe are respectively fixed with upper groove-shaped buckle plates, the ends of the lower semicircular air pipe are respectively fixed with lower groove-shaped buckle plates, the upper groove-shaped buckle plates and the lower groove-shaped buckle plates are respectively provided with sliding holes, and fixing bolts pass through the sliding holes to fix the upper groove-shaped buckle plate to the lower groove-shaped buckle plate.

[0009] The large-diameter pipeline preheating device, the distributor comprises a box body, and the box body is provided with an air inlet end and two air outlet ends. Beneficial Effects

[0010] 1. The utility model adopts a plurality of flame spray nozzles installed on the circular gas pipe. By connecting an external combustible gas power source, the butt weld of the pipe to be welded can be conveniently preheated. During operation, only one worker is needed to complete it, which liberates manpower and reduces labor intensity. At the same time, it can effectively improve work efficiency and solve the problem of difficult preheating of large-diameter pipe packages.

[0011] 2. The utility model configures the circular air pipe to be a butt joint between an upper semicircular air pipe and a lower semicircular air pipe, and the position between the two is adjustable, so that the utility model can be suitable for preheating pipes with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a side view of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the distributor;

[0015] Figure 4 It is a schematic diagram of the structure when the utility model is used;

[0016] In the figure: 1. distributor; 2. air intake head; 3. connecting hose; 4. upper semicircular air pipe; 5. U-shaped rod; 6. supporting wheel; 7. hand pull rod; 8. upper grooved buckle plate; 9. fixing bolt; 10. lower grooved buckle plate; 11. air intake connecting pipe; 12. lower semicircular air pipe; 13. universal wheel; 14. flamethrower; 15. sliding hole; 16. pipeline; 17. air outlet; 18. box body; 19. air intake. DETAILED DESCRIPTION

[0017] Reference Figure 1-Figure 3 A large-diameter pipeline preheating device, which comprises a circular air pipe, a plurality of uniformly arranged flame nozzles 14 are fixed on the outer circumferential surface of the circular air pipe, the circular air pipe comprises an upper semicircular air pipe 4 and a lower semicircular air pipe 12, the ends of the upper semicircular air pipe are respectively fixed with upper grooved buckle plates 8, the ends of the lower semicircular air pipe are respectively fixed with lower grooved buckle plates 10, the upper grooved buckle plates and the lower grooved buckle plates are respectively provided with sliding holes 15, and fixing bolts 9 pass through the sliding holes to fix the upper grooved buckle plates with the lower grooved buckle plates;

[0018] When it is necessary to adjust the distance between the upper semicircular air pipe and the lower semicircular air pipe according to the inner diameter of the pipeline, tighten the fixing bolt, then make the universal wheel of the device fall to the bottom of the pipeline, pull the upper semicircular air pipe so that the upper supporting wheel contacts the upper part of the pipeline inner wall, and then tighten the fixing bolt to adjust the position.

[0019] Two symmetrically arranged U-shaped rods 5 are fixed above and below the circular air pipe, and support wheels 6 are fixed at the rod heads of the two U-shaped rods on the upper side, and universal wheels 13 are fixed at the rod heads of the two U-shaped rods on the lower side;

[0020] The circular air pipe is provided with an air inlet head 2 , which is connected to a connecting hose 3 , which is connected to a distributor 1 , and an air inlet end of the distributor is connected to an air inlet connecting pipe 11 .

[0021] The large-diameter pipeline preheating device, the distributor includes a box body 18, and the box body is provided with an air inlet end 19 and two air outlet ends 17.

[0022] A hand pull rod is fixed on the inner ring surface of the upper semicircular air pipe and the lower semicircular air pipe respectively, which is used to hold the pulling device by hand to move inside the pipe;

[0023] When preheating is required, the air intake pipe is connected to the combustible gas source, and then the combustible gas enters the distributor through the air intake pipe, and the distributor enters the connecting hose through two air outlet ends, and then enters the upper semicircular air pipe and the lower semicircular air pipe through the air intake head, and then sprays out through each flame nozzle, and then each flame nozzle is ignited by an igniter, and each flame nozzle sprays fire separately, and then the hand pull rod is used to push the device to the part that needs preheating, so as to achieve preheating of the part of the inner wall of the pipeline 16 that needs to be welded.

Claims

1. A large-diameter pipeline preheating device, characterized by: The ring gas pipe is composed of a plurality of uniformly arranged flamethrowers fixed on the outer circumferential surface of the ring gas pipe, two symmetrically arranged U-shaped rods are fixed above and below the ring gas pipe, support wheels are fixed at the rod heads of the two U-shaped rods on the upper side, and universal wheels are fixed at the rod heads of the two U-shaped rods on the lower side; The circular air pipe is provided with an air inlet head, the air inlet head is connected to a connecting hose, the connecting hose is connected to a distributor, and the air inlet end of the distributor is connected to an air inlet connecting pipe.

2. The large-diameter pipeline preheating device according to claim 1 is characterized in that: The circular ring air pipe includes an upper semicircular ring air pipe and a lower semicircular ring air pipe. The ends of the upper semicircular ring air pipe are respectively fixed with upper groove-shaped buckle plates, and the ends of the lower semicircular ring air pipe are respectively fixed with lower groove-shaped buckle plates. Sliding holes are respectively opened on the upper groove-shaped buckle plate and the lower groove-shaped buckle plate, and fixing bolts pass through the sliding holes to fix the upper groove-shaped buckle plate to the lower groove-shaped buckle plate.

3. The large-diameter pipeline preheating device according to claim 2 is characterized in that: The distributor comprises a box body, and the box body is provided with an air inlet end and two air outlet ends.

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