Pipeline welding preheating device

Abstract

The utility model relates to the technical field of pipeline welding, and particularly discloses a pipeline welding preheating device which comprises a fixing frame and a base, a plurality of fixing rings are arranged in the fixing frame, and guide wheel assemblies for pipelines to pass through are arranged in the fixing rings. A movable ring is arranged on the front face of the fixed ring and rotationally connected with the fixed ring, an electric heating assembly used for heating a pipeline is arranged in the fixed ring, a mounting frame is arranged at the upper end of the base and arranged below the movable ring, and a rotation driving mechanism used for controlling the movable ring to rotate synchronously is arranged between the mounting frame and the movable ring. The pipeline penetrates through the fixed ring and the movable ring, the electric heating assembly preheats the pipeline penetrating through the movable ring and the fixed ring, in the preheating process, the rotary driving mechanism can control the movable ring to rotate, the movable ring drives the electric heating assembly to rotate together in the rotating process, the surface wall of the pipeline is heated evenly, and the finished product quality is better.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline welding, in particular to a pipeline welding preheating device. Background Art

[0002] Pipeline welding preheating is a process of heating the welding area before welding, aiming to improve the quality of the welded joint, reduce the welding residual stress, prevent the generation of cold cracks, and help improve the toughness of the weld metal.

[0003] For example, the Chinese patent with the application number CN202321378239.3 discloses a preheating device for pipeline welding, including two arc-shaped brackets used in cooperation. The arc-shaped bracket includes an arc-shaped plate, on which a spray gun assembly and a support assembly are arranged. A connecting screw is inserted into the through hole of the arc-shaped plate, and a locking nut is connected to the connecting screw to fix the connecting screw on the arc-shaped plate. A nozzle is arranged at the end of the connecting screw, and a joint is arranged at the head end of the connecting screw. The joint is connected to a gas pipe. The support assembly includes a support screw, which is inserted into the through hole of the arc-shaped plate, and a locking nut is connected to the support screw to fix the support screw on the arc-shaped plate. A roller is arranged at the end of the support screw. This preheating device uses the flame sprayed by the nozzle to preheat the connection of the pipeline. However, due to the fixed position of the nozzle, the flame sprayed by the nozzle will be limited to a certain place on the outer wall of the pipeline and cannot completely wrap the pipeline. Therefore, during preheating, the problem of uneven temperature in a local area of the outer wall of the pipeline will occur, affecting the quality of the welded finished product. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a pipeline welding preheating device to solve the defect that the existing preheating device will cause uneven temperature in a local area of the outer wall of the pipeline during pipeline preheating, affecting the quality of the welded finished product.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: A pipeline welding preheating device includes a fixed frame and a base. The base is fixedly connected to the upper end of the fixed frame. A plurality of fixed rings are arranged in the fixed frame. Each fixed ring is fixedly connected to the inner side of the fixed frame and placed horizontally. A guide wheel assembly for the pipeline to pass through is arranged in the fixed ring.

[0006] A movable ring is arranged on the front surface of the fixed ring. The movable ring is rotatably connected to the fixed ring. An electric heating component for heating the pipeline is arranged in the fixed ring.

[0007] An installation frame is arranged on the upper end of the base. The installation frame is placed below the movable ring. A rotation driving mechanism for controlling the synchronous rotation of each movable ring is arranged between the installation frame and the movable ring.

[0008] A further improvement lies in that: the rotary drive mechanism includes an annular gear and a toothed plate. The annular gear is sleeved outside the movable ring, and the annular gear is fixedly connected to the movable ring. The toothed plate is placed below the annular gear, and the toothed plate meshes with each annular gear. A horizontal drive member for pushing the toothed plate to move horizontally is provided in the mounting frame.

[0009] A further improvement lies in that: the translation drive member includes a screw rod, a motor and a nut seat. The screw rod is placed in the mounting frame, and both ends of the screw rod are rotatably connected to the mounting frame. The motor is installed outside the mounting frame, and the output shaft of the motor is fixedly connected to the screw rod. The nut seat is sleeved outside the screw rod, and the nut seat is threadedly connected to the screw rod. The nut seat is fixedly connected to the toothed plate through a connecting block.

[0010] A further improvement lies in that: the guide wheel assembly includes three guide wheel seats fixedly connected to the inner side of the fixed ring. Each guide wheel seat is evenly arranged in the circumferential direction of the axis of the fixed ring. A guide wheel is provided at one end of the guide wheel seat away from the fixed ring, and the guide wheel is rotatably connected to the guide wheel seat.

[0011] A further improvement lies in that: the electric heating assembly includes a plurality of connecting seats fixedly connected to the inner side of the movable ring. Each connecting seat is evenly arranged in the circumferential direction of the axis of the movable ring. The axis of the movable ring coincides with the axis of the fixed ring. An electric heating wire is fixedly connected between two adjacent connecting seats.

[0012] A further improvement lies in that: a rod support is provided at the upper end of the base. A limiting rod is provided in the rod support, and both ends of the limiting rod are fixedly connected to the rod support. The limiting rod penetrates through the connecting block, and the limiting rod is slidably connected to the connecting block.

[0013] A further improvement lies in that: a plurality of legs are provided at the bottom of the base. The legs are fixedly connected to the base, and rubber gaskets are provided at the bottoms of the legs.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The pipeline passes through the fixed ring and the movable ring. The electric heating assembly preheats the pipeline passing through the movable ring and the fixed ring. During the preheating process, the rotary drive mechanism controls the rotation of the movable ring. The movable ring drives the electric heating assembly to rotate together during the rotation, and the outer wall of the pipeline is heated evenly, and the finished product quality is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a structural diagram of the fixed frame in the present utility model.

[0018] Figure 2 It is the structural diagram of the fixed ring in the present utility model.

[0019] Figure 3 It is the structural diagram of the movable ring in the present utility model.

[0020] Figure 4 It is the structural diagram of the connecting block in the present utility model.

[0021] Wherein: 1. Fixed frame; 2. Base; 3. Mounting frame; 4. Screw; 5. Tooth plate; 6. Movable ring; 7. Nut seat; 8. Motor; 9. Fixed ring; 10. Guide wheel; 11. Guide wheel seat; 12. Ring gear; 13. Connecting seat; 14. Heating wire; 15. Connecting block; 16. Limit rod; 17. Rod support. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0023] According to Figure 1 , 2 , as shown in Figures 3 and 4, a pipeline welding preheating device is proposed in this embodiment, which includes a fixed frame 1 and a base 2. The base 2 is fixedly connected to the upper end of the fixed frame 1. A plurality of fixed rings 9 are provided inside the fixed frame 1. Each fixed ring 9 is fixedly connected to the inner side of the fixed frame 1 and is placed horizontally. A guide wheel assembly for the pipeline to pass through is provided inside the fixed ring 9;

[0024] A movable ring 6 is provided on the front surface of the fixed ring 9. The movable ring 6 is rotatably connected to the fixed ring 9. An electric heating assembly for heating the pipeline is provided inside the fixed ring 9; The pipeline passes through the fixed ring 9 and the movable ring 6. The guide wheel assembly will limit the pipeline and support the forward and backward movement and loading and unloading of the pipeline. The electric heating assembly preheats the pipeline passing through the movable ring 6 and the fixed ring 9. The arranged fixed rings 9 support the preheating device to preheat multiple groups of pipelines simultaneously, with higher efficiency.

[0025] A mounting frame 3 is provided on the upper end of the base 2. The mounting frame 3 is placed below the movable ring 6. A rotation driving mechanism for controlling the synchronous rotation of each movable ring 6 is provided between the mounting frame 3 and the movable ring 6. During the preheating process, the rotation driving mechanism will control the rotation of the movable ring 6. The movable ring 6 will drive the electric heating assembly to rotate together during the rotation, and the outer wall of the pipeline is evenly heated, and the finished product quality is better.

[0026] For the specific structure of the rotary drive mechanism, please refer to the following description.

[0027] The rotary drive mechanism includes a ring gear 12 and a tooth plate 5. The ring gear 12 is sleeved on the outside of the movable ring 6. The ring gear 12 is fixedly connected to the movable ring 6. The tooth plate 5 is placed under the ring gear 12. The tooth plate 5 is meshed with each ring gear 12. A horizontal driving member for pushing the tooth plate 5 to move horizontally is provided in the mounting frame 3.

[0028] The horizontal driving member pushes the toothed plate 5 to move horizontally between the base 2 and the movable ring 6. During the horizontal movement of the toothed plate 5, the teeth on the upper end surface of the toothed plate 5 will mesh with the ring gear 12 on the outside of the movable ring 6, thereby pushing the ring gear 12 to rotate. Since each ring gear 12 is meshed with the toothed plate 5 at the same time, each movable ring 6 will rotate at the same time to adjust the position of the electric heating component inside the movable ring 6.

[0029] About translation drive:

[0030] The translation drive member includes a screw rod 4, a motor 8 and a nut seat 7. The screw rod 4 is placed in the mounting frame 3. Both ends of the screw rod 4 are rotatably connected to the mounting frame 3. The motor 8 is mounted on the outside of the mounting frame 3. The output shaft of the motor 8 is fixedly connected to the screw rod 4. The nut seat 7 is sleeved on the outside of the screw rod 4. The nut seat 7 is threadedly connected to the screw rod 4. The nut seat 7 is fixedly connected to the tooth plate 5 through a connecting block 15. The connecting block 15 is arranged between the nut seat 7 and the tooth plate 5. One end of the connecting block 15 is fixed to the nut seat 7, and the other end of the connecting block 15 is fixed to the tooth plate 5. When the motor 8 drives the screw rod 4 to rotate, the screw rod 4 will drive the nut seat 7 to move along the rod body of the screw rod 4 through the cooperation with the nut seat 7. Since the tooth plate 5 is fixed to the nut seat 7 through the connecting block 15, when the nut seat 7 moves, the tooth plate 5 will also translate, thereby completing the shifting of the ring gear 12.

[0031] In addition, the guide wheel assembly includes three guide wheel seats 11 fixedly connected to the inner side of the fixing ring 9, each guide wheel seat 11 is evenly arranged in the circumferential direction of the axis of the fixing ring 9, and a guide wheel 10 is provided at one end of the guide wheel seat 11 away from the fixing ring 9, and the guide wheel 10 is rotatably connected to the guide wheel seat 11. The pipeline to be preheated passes through the center of the fixing ring 9, and the guide wheel 10 on the guide wheel seat 11 limits the pipeline from the circumferential side of the pipeline and supports the pipeline to move horizontally along the axis of the fixing ring 9 for loading and unloading.

[0032] In addition, the electrothermal component includes a plurality of connecting seats 13 fixedly connected to the inner side of the movable ring 6. Each connecting seat 13 is evenly arranged in the circumferential direction of the axis of the movable ring 6. The axis of the movable ring 6 coincides with the axis of the fixed ring 9. An electrothermal wire 14 is fixedly connected between two adjacent connecting seats 13. After the electrothermal wire 14 is electrified, it will generate heat to preheat the pipeline passing through the movable ring 6 and the fixed ring 9. During the preheating process, the movable ring 6 will rotate, so that the electrothermal wire 14 can evenly heat the outer wall of the pipeline.

[0033] To prevent the nut seat 7 from deflecting when moving along the rod body of the screw rod 4, which may affect the translational stability of the tooth plate 5. In a preferred solution, a rod support 17 is provided at the upper end of the base 2. A limiting rod 16 is provided inside the rod support 17. Both ends of the limiting rod 16 are fixedly connected to the rod support 17. The limiting rod 16 penetrates through the connecting block 15, and the limiting rod 16 is slidably connected to the connecting block 15. When the nut seat 7 moves along the rod body of the screw rod 4, the connecting block 15 fixed to the nut seat 7 will also move along the rod body of the limiting rod 16. The limiting rod 16 limits the connecting block 15 by cooperating with the connecting block 15, and the nut seat 7 will not deflect during movement.

[0034] In a preferred solution, a plurality of legs are provided at the bottom of the base 2. The legs are fixedly connected to the base 2, and rubber gaskets are provided at the bottoms of the legs. The rubber gaskets are fixed to the bottoms of the legs, which can play a role in shock absorption and anti-slip, improving the stability of the preheating device during operation.

[0035] The working principle of this application:

[0036] The pipeline passes through the fixed ring 9 and the movable ring 6. The guide wheel assembly will limit the pipeline and support the forward and backward movement and loading and unloading of the pipeline. The electrothermal component preheats the pipeline passing through the movable ring 6 and the fixed ring 9. The arranged fixed rings 9 support the preheating device to preheat multiple groups of pipelines simultaneously. The horizontal driving member pushes the tooth plate 5 to move horizontally between the base 2 and the movable ring 6. During the horizontal movement of the tooth plate 5, the teeth on the upper end surface of the tooth plate 5 will engage with the annular gear 12 on the outer side of the movable ring 6, thereby driving the annular gear 12 to rotate. Since each annular gear 12 meshes with the tooth plate 5 simultaneously, each movable ring 6 will rotate simultaneously. The movable ring 6 drives the electrothermal component to rotate together during rotation, and the outer wall of the pipeline is evenly heated, and the quality of the finished product is better.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A pipeline welding preheating device, comprising a fixed frame (1) and a base (2), wherein the base (2) is fixedly connected to the fixed frame (1), and is characterized in that: The fixed frame (1) is provided with a plurality of fixed rings (9). Each of the fixed rings (9) is fixedly connected to the inner side of the fixed frame (1) and placed horizontally. A guide wheel assembly for the pipeline to pass through is arranged in the fixed ring (9). A movable ring (6) is arranged on the front surface of the fixed ring (9). The movable ring (6) is rotatably connected to the fixed ring (9). An electric heating assembly for heating the pipeline is arranged in the fixed ring (9). An installation frame (3) is arranged at the upper end of the base (2). The installation frame (3) is placed below the movable ring (6). A rotation driving mechanism for controlling the synchronous rotation of each movable ring (6) is arranged between the installation frame (3) and the movable ring (6).

2. The preheating device for pipeline welding according to claim 1, wherein: The rotation driving mechanism includes an annular gear (12) and a toothed plate (5). The annular gear (12) is sleeved on the outer side of the movable ring (6). The annular gear (12) is fixedly connected to the movable ring (6). The toothed plate (5) is placed below the annular gear (12). The toothed plate (5) meshes with each annular gear (12). A horizontal driving member for pushing the toothed plate (5) to move horizontally is arranged in the installation frame (3).

3. A pipeline welding preheating device according to claim 2, characterized in that: The horizontal driving member includes a screw rod (4), a motor (8) and a nut seat (7). The screw rod (4) is arranged in the installation frame (3). The two ends of the screw rod (4) are rotatably connected to the installation frame (3). The motor (8) is installed on the outer side of the installation frame (3). The output shaft of the motor (8) is fixedly connected to the screw rod (4). The nut seat (7) is sleeved on the outer side of the screw rod (4). The nut seat (7) is threadedly connected to the screw rod (4). The nut seat (7) is fixedly connected to the toothed plate (5) through a connecting block (15).

4. A pipeline welding preheating device according to claim 1, characterized in that: The guide wheel assembly includes three guide wheel seats (11) fixedly connected to the inner side of the fixed ring (9). Each of the guide wheel seats (11) is evenly arranged in the circumferential direction of the axis of the fixed ring (9). A guide wheel (10) is arranged at one end of the guide wheel seat (11) away from the fixed ring (9). The guide wheel (10) is rotatably connected to the guide wheel seat (11).

5. A pipeline welding preheating device according to claim 1, characterized in that: The electric heating assembly includes a plurality of connecting seats (13) fixedly connected to the inner side of the movable ring (6). Each of the connecting seats (13) is evenly arranged in the circumferential direction of the axis of the movable ring (6). The axis of the movable ring (6) coincides with the axis of the fixed ring (9). An electric heating wire (14) is fixedly connected between two adjacent connecting seats (13).

6. A pipeline welding preheating device according to claim 3, characterized in that: A rod support (17) is arranged at the upper end of the base (2). A limiting rod (16) is arranged in the rod support (17). The two ends of the limiting rod (16) are fixedly connected to the rod support (17). The limiting rod (16) penetrates through the connecting block (15). The limiting rod (16) is slidably connected to the connecting block (15).

7. A pipeline welding preheating device according to claim 1, characterized in that: A plurality of legs are arranged at the bottom of the base (2). The legs are fixedly connected to the base (2). Rubber gaskets are arranged at the bottoms of the legs.

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