Hot melt welding device for plastic butt joint

Abstract

The utility model discloses a kind of hot melting welding devices for plastic butt joint, including multiple support frames, multiple the support frame are all equipped with heating plate and fixed frame by cylinder respectively, connecting wire is installed on the heating plate, function block is fixedly arranged on the fixed frame, transmission chamber and rotating chamber are equipped in the function block, transmission shaft is rotatably arranged in the transmission chamber, power mechanism connected with transmission shaft is equipped on the fixed frame, screw rod extending into transmission chamber is rotatably arranged in the rotating chamber. The utility model is fixed from inside to outside by positioning plate, utilizes the annular structure of pipe material to bear internal force, can be fixed firm, can also avoid that external excessive pressure leads to pipe material deformation, ensure butt joint accuracy and internal flow area, guarantee use performance.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic pipe connection equipment, and in particular to a hot melt welding device for plastic butt welding. Background Technology

[0002] Plastic butt welding is a process that connects the ends of two thermoplastic pipes or profiles into a single unit. It is widely used in municipal, gas, chemical, and home decoration industries. Hot melt welding equipment, with its ability to melt and fuse the plastic contact surfaces to form a high-strength, highly airtight joint, has become the core equipment of this process. Compared to adhesive bonding and mechanical connections, it is more suitable for high-pressure and long-term use scenarios.

[0003] Existing thermoplastic welding equipment often uses external clamping components to hold the pipe, which can easily cause irreversible damage. Thermoplastic pipes have low rigidity and weak resistance to compression, requiring sufficient clamping force from the external clamps to prevent displacement during welding. However, insufficient force can lead to unstable positioning and misalignment of the weld surfaces; excessive force can flatten the pipe and damage its circular cross-section. This not only results in poor fit between the butt joints, affecting weld quality, but also reduces the internal flow area, increases transport resistance, and makes the pipe prone to cracking due to stress concentration, shortening its lifespan and even causing leakage hazards in high-pressure scenarios. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hot melt welding device for plastic butt welding.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hot melt welding device for plastic butt welding includes multiple support frames, each of which is equipped with a heating plate and a fixed frame via a cylinder. A connecting wire is installed on the heating plate. A functional block is fixedly mounted on the fixed frame. The functional block has a transmission chamber and a rotating chamber inside. A transmission shaft is rotatably mounted in the transmission chamber. A power mechanism connected to the transmission shaft is mounted on the fixed frame. A screw extending into the transmission chamber is rotatably mounted in the rotating chamber. The screw is connected to the transmission shaft via the transmission mechanism. A positioning plate is provided outside the functional block. The positioning plate is connected to the screw via a connecting mechanism.

[0007] Preferably, the power mechanism includes a drive motor fixedly mounted on a fixed frame, and the output shaft of the drive motor is fixedly connected to the transmission shaft.

[0008] Preferably, the transmission mechanism includes a first gear fixedly mounted on the transmission shaft, and a second gear meshing with the first gear is provided on the screw.

[0009] Preferably, the connecting mechanism includes a connecting frame threaded onto the screw, and the end of the connecting frame is fixedly connected to the positioning plate.

[0010] Preferably, each functional block has four positioning plates on its exterior, and the four positioning plates are evenly spaced around the perimeter.

[0011] Preferably, both the first gear and the second gear are bevel gears, and the specific meshing relationship between the first gear and the second gear is perpendicular meshing.

[0012] The beneficial effects of this utility model are:

[0013] 1. The positioning plate is fixed from the inside out, and the ring structure of the pipe is used to bear the internal force. This not only ensures a firm fixation, but also avoids the deformation of the pipe caused by excessive external pressure, ensuring docking accuracy and internal flow area, and guaranteeing performance.

[0014] 2. The first gear and the second gear mesh perpendicularly to achieve power conversion, drive multiple screws to rotate synchronously, ensure that the four positioning plates move synchronously and the force is even; and the U-shaped connecting frame has its own limit, making the transmission efficient and stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a hot melt welding device for plastic butt welding proposed in this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the structure viewed from below;

[0017] Figure 3 for Figure 1 A schematic diagram of the vertical section structure;

[0018] Figure 4 for Figure 3 An enlarged schematic diagram of the structure at point A.

[0019] In the diagram: 1 Support frame, 2 Cylinder, 3 Limiting frame, 4 Heating plate, 5 Connecting line, 6 Functional block, 7 Fixing frame, 8 Transmission chamber, 9 Rotating chamber, 10 Screw, 11 Transmission shaft, 12 First gear, 13 Second gear, 14 Connecting frame, 15 Positioning plate, 16 Drive motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-4A hot melt welding device for plastic butt welding includes multiple support frames 1. Each support frame 1 is equipped with a heating plate 4 and a fixed frame 7 via a cylinder 2. A connecting wire 5 is installed on the heating plate 4. A functional block 6 is fixedly installed on the fixed frame 7. The functional block 6 has a transmission chamber 8 and a rotating chamber 9 inside. A transmission shaft 11 is rotatably installed in the transmission chamber 8. A power mechanism connected to the transmission shaft 11 is installed on the fixed frame 7. A screw 10 extending into the transmission chamber 8 is rotatably installed in the rotating chamber 9. The screw 10 is connected to the transmission shaft 11 through a transmission mechanism. A positioning plate 15 is provided on the outside of the functional block 6. The positioning plate 15 is connected to the screw 10 through a connecting mechanism.

[0022] The power mechanism includes a drive motor 16 fixedly mounted on the fixed frame 7, and the output shaft of the drive motor 16 is fixedly connected to the transmission shaft 11.

[0023] The transmission mechanism includes a first gear 12 fixedly mounted on the transmission shaft 11, and a second gear 13 meshing with the first gear 12 on the screw 10. Both the first gear 12 and the second gear 13 are bevel gears, and their meshing relationship is perpendicular. This bevel gear meshing enables power transmission, allowing multiple screws 10 to rotate synchronously after the drive motor 16. The thread orientation of the screws 10 is set according to their rotation direction, ensuring that the multiple positioning plates 15 outside each functional block 6 move synchronously closer or further away.

[0024] The connecting mechanism includes a connecting frame 14 threaded onto the screw 10, with the end of the connecting frame 14 fixedly connected to the positioning plate 15. The connecting frame 14 has a U-shaped design, with its vertical portion sliding through the inner wall of the rotating chamber 9 and extending to the outside of the functional block 6. Therefore, it has its own limit and will not rotate with the screw 10.

[0025] Each functional block 6 has four external positioning plates 15, which are evenly spaced circumferentially. This even spacing ensures uniform force distribution and guarantees the stability of the fixed pipe from the inside out.

[0026] When using this utility model:

[0027] The drive motor 16 (power mechanism) is started, and its output shaft drives the transmission shaft 11 to rotate in the transmission chamber 8. The first gear 12 (bevel gear) on the transmission shaft 11 meshes perpendicularly with the second gear 13 (bevel gear) on the screw 10 (transmission mechanism), thereby driving the screw 10 in the rotating chamber 9 to rotate. The screw 10 drives the connecting frame 14 (connecting mechanism) to move through the thread, so that the positioning plate 15 squeezes the hollow plastic pipe from the inside to the outside, thereby fixing the pipe. At the same time, the pipe end is limited by the limiting frame 3 to ensure stability.

[0028] Then two of the cylinders 2 are activated, causing the ends of the two pipes to approach and make contact.

[0029] Then, the other two cylinders 2 are started, which moves the heating plate 4 close to the outside of the interface of the two pipes; the heating plate 4 is connected to the power supply through the connecting wire 5 and heated to the plastic melting temperature (such as 180-200℃ for PE pipes) to heat the outer wall and end face of the pipe end, so that the plastic at the contact surface melts and the connection operation is performed.

[0030] After the connection is complete, first move the heating plate 4 away, then wait for it to cool down to fully connect. Then, the positioning plate 15 retracts and moves closer to release the fixation. Finally, move the two functional blocks away to remove the two pipes that are connected together.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hot-melt welding device for plastic butt joining comprising a plurality of support frames (1), characterized in that, Each of the multiple support frames (1) is equipped with a heating plate (4) and a fixed frame (7) respectively via a cylinder (2). A connecting line (5) is installed on the heating plate (4). A functional block (6) is fixedly installed on the fixed frame (7). The functional block (6) is equipped with a transmission chamber (8) and a rotating chamber (9) inside. A transmission shaft (11) is rotatably installed in the transmission chamber (8). A power mechanism connected to the transmission shaft (11) is installed on the fixed frame (7). A screw (10) extending into the transmission chamber (8) is rotatably installed in the rotating chamber (9). The screw (10) is connected to the transmission shaft (11) through a transmission mechanism. A positioning plate (15) is provided on the outside of the functional block (6). The positioning plate (15) is connected to the screw (10) through a connecting mechanism.

2. The hot melt welding device for plastic butt welding according to claim 1, characterized in that, The power mechanism includes a drive motor (16) fixedly mounted on a fixed frame (7), and the output shaft of the drive motor (16) is fixedly connected to the transmission shaft (11).

3. The hot melt welding device for plastic butt welding according to claim 2, characterized in that, The transmission mechanism includes a first gear (12) fixedly mounted on the transmission shaft (11), and a second gear (13) meshing with the first gear (12) on the screw (10).

4. The hot melt welding device for plastic butt welding according to claim 3, characterized in that, The connecting mechanism includes a connecting frame (14) threadedly mounted on the screw (10), and the end of the connecting frame (14) is fixedly connected to the positioning plate (15).

5. A hot melt welding device for plastic butt welding according to claim 4, characterized in that, Each of the functional blocks (6) has four positioning plates (15) on its exterior, and the four positioning plates (15) are evenly spaced around the perimeter.

6. The hot melt welding device for plastic butt welding according to claim 5, characterized in that, Both the first gear (12) and the second gear (13) are bevel gears, and the specific meshing relationship between the first gear (12) and the second gear (13) is perpendicular meshing.

Images