Pipeline preheating device

Abstract

The utility model discloses a pipeline preheating device and belongs to the technical field of pipeline welding, the pipeline preheating device comprises a moving frame, a supporting frame, an annular frame and a plurality of preheating assemblies, the supporting frame is installed at the moving end of the moving frame, the annular frame is installed on the supporting frame, and the preheating assemblies are arranged on the annular frame. The preheating assemblies are evenly arranged on the annular frame in the circumferential direction, each preheating assembly comprises an electric telescopic rod, a mounting plate and a flame projector, the electric telescopic rods are fixedly mounted on the annular frame, the mounting plates are fixedly mounted at the telescopic ends of the electric telescopic rods, and the flame projectors are fixedly mounted on the mounting plates. When the small-caliber pipeline is heated, the electric telescopic rod is started and can drive the mounting plate to move, so that the flame projector moves towards the center of the annular frame, the power of the flame projector does not need to be increased, and energy waste is reduced.

Description

Technical Field

[0001] This application relates to the technical field of pipe welding, and in particular discloses a pipe preheating device. Background Technology

[0002] Welding, also known as fusion welding, is a manufacturing process and technology that joins metals or other thermoplastic materials such as plastics by heating, high temperature, or high pressure. In the welding process of prefabricated pipes, preheating before welding is an essential step.

[0003] Existing pipe preheating devices include a support frame, a ring frame, and flamethrowers. The ring frame is fixed to the top of the support frame. Multiple flamethrowers are installed and evenly fixed within the ring frame circumferentially. By placing the ring frame over the pipe to be welded, activating the flamethrowers, and moving the support frame, preheating of the pipe to be welded can be achieved.

[0004] Regarding the existing technology mentioned above, the inventors discovered that when the pipe diameter is small, the power of the flamethrower needs to be increased to ensure the preheating effect, which leads to energy waste. Utility Model Content

[0005] To reduce energy waste, this application provides a pipeline preheating device.

[0006] This application provides a pipeline preheating device, which adopts the following technical solution:

[0007] A pipeline preheating device includes a movable frame, a support frame, an annular frame, and preheating components. The support frame is installed at the movable end of the movable frame, and the annular frame is installed on the support frame. Multiple sets of preheating components are provided and are evenly arranged circumferentially on the annular frame. Each preheating component includes an electric telescopic rod, a mounting plate, and a flamethrower. The electric telescopic rod is fixedly installed on the annular frame, the mounting plate is fixedly installed on the telescopic end of the electric telescopic rod, and the flamethrower is fixedly installed on the mounting plate.

[0008] By adopting the above technical solution, when heating small-diameter pipes, the electric telescopic rod is activated, which can move the mounting plate, causing the flamethrower to move towards the center of the ring frame. This eliminates the need to increase the flamethrower power and reduces energy waste.

[0009] Optionally, the ring frame includes a lower hoop plate, an upper hoop plate, and fixing bolts. The lower hoop plate is fixedly installed on the support frame, and the upper hoop plate is fixed to the top of the lower hoop plate by fixing bolts.

[0010] By adopting the above technical solution and removing the fixing bolts, the upper hoop can be removed from the lower hoop, which makes it easier to place the pipe inside the ring frame and facilitates preheating of the pipe welding joint.

[0011] Optionally, the support frame includes a hydraulic cylinder and a first fixed plate. The hydraulic cylinder is fixed to the moving end of the movable frame, the first fixed plate is fixed to the telescopic end of the hydraulic cylinder, and the lower hoop is fixed to the first fixed plate.

[0012] By adopting the above technical solution, the hydraulic cylinder can drive the first fixed plate to rise and fall, thereby raising and lowering the ring frame, which facilitates the preheating component to preheat pipes at different heights.

[0013] Optionally, the movable frame includes a slide plate, a bidirectional screw, a drive motor, and sliders. The slide plate has a slide groove on its upper surface. The bidirectional screw is rotatably connected to the opposite side walls of the slide plate. The drive motor is fixed to the outer side of the slide plate, and the output end of the drive motor is fixedly connected to the bidirectional screw. Two sliders are provided, and two sets of annular frames are provided. The two sliders are respectively threaded to both sides of the bidirectional screw, and the two sliders are slidably connected in the slide groove of the slide plate.

[0014] By adopting the above technical solution, the drive motor is started, which can drive the bidirectional screw to rotate. The rotation of the bidirectional screw can drive the two sliders to move closer or further apart, thereby driving the two annular frames to move closer or further apart, which facilitates the simultaneous preheating of the two pipes to be welded.

[0015] Optionally, the movable frame and the support frame are each arranged in two sets symmetrically.

[0016] By adopting the above technical solutions, the support effect of the mobile frame and the support frame on the ring frame has been improved.

[0017] Optionally, rollers are installed at the bottom end of the chute plate.

[0018] By adopting the above technical solution, the preheating device can be moved easily.

[0019] Optionally, a second fixing plate is fixed to the side of the slide plate, and the second fixing plate is threadedly connected to a threaded support leg.

[0020] By adopting the above technical solution, before the preheating device is moved to the pipe to be welded, the threaded support leg is rotated so that the bottom end of the threaded support leg is lifted off the ground, making it easier for the preheating device to move to the pipe to be welded; after the preheating device is moved to the pipe to be welded, the threaded support leg is rotated so that the bottom end of the threaded support leg contacts the ground, making it difficult for the preheating device to move during operation, and making it easier for the preheating device to heat the pipe.

[0021] Optionally, a support disc is fixed to the bottom end of the threaded leg.

[0022] By adopting the above technical solution, the contact area between the threaded support leg and the ground is increased, thereby reducing the damage to the ground caused by the threaded support leg.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] When heating small-diameter pipes, the electric telescopic rod is activated. The electric telescopic rod can move the mounting plate, allowing the flamethrower to move towards the center of the ring frame without increasing the flamethrower power, thus reducing energy waste.

[0025] Start the drive motor, which can drive the bidirectional screw to rotate. The rotation of the bidirectional screw can drive the two sliders to move closer or further apart, thereby driving the two ring frames to move closer or further apart, which facilitates the simultaneous preheating of the two pipes to be welded.

[0026] Before the preheating device is moved to the pipe to be welded, rotate the threaded support leg so that the bottom end of the threaded support leg is off the ground, making it easier for the preheating device to move to the pipe to be welded; after the preheating device is moved to the pipe to be welded, rotate the threaded support leg so that the bottom end of the threaded support leg contacts the ground, making it difficult for the preheating device to move during operation, and making it easier for the preheating device to heat the pipe. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of this application.

[0028] Figure 2 This is a schematic diagram of the connection structure between the ring frame and the preheating component in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Moving frame; 11. Slide plate; 12. Bidirectional screw; 13. Drive motor; 14. Slider; 15. Roller; 16. Second fixed plate; 17. Threaded support leg; 171. Support disc; 2. Support frame; 21. Hydraulic cylinder; 22. First fixed plate; 3. Ring frame; 31. Lower hoop plate; 32. Upper hoop plate; 33. Fixing bolt; 4. Preheating assembly; 41. Electric telescopic rod; 42. Mounting plate; 43. Flamethrower. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0031] This application discloses a pipeline preheating device. (Refer to...) Figure 1 A pipeline preheating device includes a movable frame 1, a support frame 2, an annular frame 3, and a preheating component 4. The support frame 2 is mounted on the movable end of the movable frame 1. The annular frame 3 is mounted on the support frame 2. The preheating component 4 is mounted on the annular frame 3.

[0032] Reference Figure 1Two sets of movable frames 1 are symmetrically arranged. The movable frame 1 includes a slide plate 11, a bidirectional screw 12, a drive motor 13, sliders 14, rollers 15, a second fixed plate 16, and threaded legs 17. A slide groove is formed on the upper surface of the slide plate 11. The bidirectional screw 12 is rotatably connected to the opposite side walls of the slide plate 11. The drive motor 13 is fixed to the outer side of the slide plate 11, and its output end is fixedly connected to the bidirectional screw 12. Two sliders 14 are provided, each threadedly connected to both sides of the bidirectional screw 12, and slidably connected within the slide groove of the slide plate 11. When the drive motor 13 is started, it drives the bidirectional screw 12 to rotate, causing the two sliders 14 to move closer or further apart.

[0033] Reference Figure 1 Two rollers 15 are provided, installed at both ends of the bottom surface of the slide plate 11. Two second fixing plates 16 are provided, fixed at both ends of the outer side of the slide plate 11. Two threaded legs 17 are provided, threadedly connected to the two second fixing plates 16 respectively. A support disc 171 is fixed to the bottom end of the threaded leg 17. This increases the contact area between the threaded leg 17 and the ground, reducing damage to the ground. Before the preheating device moves to the pipe to be welded, the threaded leg 17 is rotated so that the bottom end of the threaded leg 17 is lifted off the ground, facilitating the movement of the preheating device to the pipe to be welded; after the preheating device moves to the pipe to be welded, the threaded leg 17 is rotated so that the bottom end of the threaded leg 17 contacts the ground, making it difficult for the preheating device to move during operation and facilitating the preheating device to heat the pipe.

[0034] Reference Figure 1 and Figure 2 Two sets of support frames 2 are symmetrically arranged. Each support frame 2 includes a hydraulic cylinder 21 and a first fixed plate 22. The hydraulic cylinder 21 is fixed at the middle position of the upper surface of the slider 14. The first fixed plate 22 is fixed to the telescopic end of the hydraulic cylinder 21. The annular frame 3 is mounted on the fixed plate. Activating the hydraulic cylinder 21 causes the first fixed plate 22 to rise and fall, thereby causing the annular frame 3 to rise and fall, facilitating the preheating assembly 4 to preheat pipes at different heights.

[0035] Reference Figure 1 and Figure 2Two sets of ring-shaped frames 3 are provided. The ring-shaped frame 3 includes a lower hoop plate 31, an upper hoop plate 32, and fixing bolts 33. The lower hoop plate 31 is fixedly installed on the upper surface of the first fixing plate 22. The upper hoop plate 32 is fixed to the top of the lower hoop plate 31 by the fixing bolts 33. Multiple sets of preheating components 4 are provided, evenly distributed on the upper hoop plate 32 and the lower hoop plate 31. The preheating component 4 includes an electric telescopic rod 41, a mounting plate 42, and a flamethrower 43. The electric telescopic rod 41 is fixedly installed on the ring-shaped frame 3. The mounting plate 42 is fixedly installed on the telescopic end of the electric telescopic rod 41. The flamethrower 43 is fixedly installed on the inner side of the mounting plate 42.

[0036] Reference Figure 1 and Figure 2 When heating small-diameter pipes, the electric telescopic rod 41 is activated, which can move the mounting plate 42, causing the flamethrower 43 to move towards the center of the ring frame 3. This eliminates the need to increase the power of the flamethrower 43, thus reducing energy waste.

[0037] The implementation principle of a pipeline preheating device according to an embodiment of this application is as follows: Before pipeline preheating, the upper clamp plate 32 is removed by removing the fixing bolts 33. After the upper clamp plate 32 is removed, the hydraulic cylinder 21 is activated, which drives the lower clamp plate 31 to descend, so that the upper surface of the lower clamp plate 31 is lower than the bottom surface of the pipeline. After the upper surface of the lower clamp plate 31 is lower than the bottom surface of the pipeline, the preheating component 4 is moved directly below the pipeline, and the hydraulic cylinder 21 is activated, which drives the lower clamp plate 31 to rise, so that the upper surface of the lower clamp plate 31 is located at the center of the pipeline. The upper clamp plate 32 is installed by installing the fixing bolts 33. After the upper clamp plate 32 is installed, the electric telescopic rod 41 is activated, which can drive the mounting plate 42 to move, thereby adjusting the position of the flamethrower 43 to facilitate pipeline preheating. After the position of the flamethrower 43 is adjusted, the drive motor 13 and the flamethrower 43 are started simultaneously. The drive motor 13 can drive the two sets of annular frames 3 to move away from each other, which can simultaneously heat the two pipelines to be welded.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A duct preheating apparatus characterized by: The device includes a movable frame (1), a support frame (2), a ring frame (3), and a preheating assembly (4). The support frame (2) is installed on the movable end of the movable frame (1), and the ring frame (3) is installed on the support frame (2). The preheating assembly (4) is provided in multiple sets, and the multiple sets of the preheating assembly (4) are evenly arranged on the ring frame (3) along the circumference. The preheating assembly (4) includes an electric telescopic rod (41), a mounting plate (42), and a flamethrower (43). The electric telescopic rod (41) is fixedly installed on the ring frame (3), the mounting plate (42) is fixedly installed on the telescopic end of the electric telescopic rod (41), and the flamethrower (43) is fixedly installed on the mounting plate (42).

2. A duct preheating apparatus according to claim 1, characterised in that: The ring frame (3) includes a lower hoop plate (31), an upper hoop plate (32), and fixing bolts (33). The lower hoop plate (31) is fixedly installed on the support frame (2), and the upper hoop plate (32) is fixed to the top of the lower hoop plate (31) by fixing bolts (33).

3. A duct preheating apparatus according to claim 2, characterised in that: The support frame (2) includes a hydraulic cylinder (21) and a first fixing plate (22). The hydraulic cylinder (21) is fixed to the moving end of the movable frame (1), and the first fixing plate (22) is fixed to the telescopic end of the hydraulic cylinder (21). The lower hoop plate (31) is fixed on the first fixing plate (22).

4. A duct preheating apparatus according to claim 1, wherein: The movable frame (1) includes a slide plate (11), a bidirectional screw (12), a drive motor (13), and a slider (14). The upper surface of the slide plate (11) is provided with a slide groove. The bidirectional screw (12) is rotatably connected to the opposite side walls of the slide plate (11). The drive motor (13) is fixed on the outer side of the slide plate (11), and the output end of the drive motor (13) is fixedly connected to the bidirectional screw (12). Two sliders (14) are provided, and two sets of the ring frame (3) are provided. The two sliders (14) are respectively threaded to both sides of the bidirectional screw (12), and the two sliders (14) are slidably connected in the slide groove of the slide plate (11).

5. A duct preheating apparatus according to claim 4, characterised in that: The movable frame (1) and the support frame (2) are both symmetrically arranged in two sets.

6. A duct preheating apparatus according to claim 4, characterised in that: Rollers (15) are installed at the bottom of the slide plate (11).

7. A duct preheating apparatus according to claim 6, characterised in that: The slide plate (11) is fixed with a second fixing plate (16) on its side, and the second fixing plate (16) is threadedly connected with a threaded support leg (17).

8. A duct preheating apparatus according to claim 7, characterised in that: The bottom end of the threaded leg (17) is fixed with a support disc (171).

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