Fixed type plastic composite pipe reinforcing band ultrasonic welding machine

Abstract

The utility model discloses a fixed ultrasonic welding machine for a reinforcing band of a plastic composite pipe, and belongs to the technical field of plastic base pipe forming. The center of the mounting plate is provided with a through hole for a base pipe to pass through, and a reinforcing belt is wound on the surface of the base pipe; the at least three ultrasonic welding mechanisms are evenly distributed on the mounting plate, each ultrasonic welding mechanism comprises a welding head, the welding heads are used for making contact with reinforcing belts on the surface of the base tube and applying pressure, and friction heat is generated on the joint faces between the reinforcing belts and the base tube or between the adjacent reinforcing belts for welding through high-frequency vibration of the welding heads; the sum of the contact perimeters of the welding heads and the base tube is larger than or equal to the perimeter of the base tube. As the reinforcing belt and the base pipe do not need to be preheated, the problem that gaps between adjacent belts are changed after winding due to the fact that the preheated reinforcing belt is heated and stretched under the action of tension is avoided, the problem that the base pipe is stretched and deformed due to heating in the forward traction process is also avoided, and the quality of the formed composite pipe is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of plastic base pipe molding technology, specifically relating to a fixed plastic composite pipe reinforcing ultrasonic welding machine. Background Technology

[0002] Plastic composite pipes often use glass fiber or polyester filament as reinforcing material to coat PE to prepare reinforcing tape. The reinforcing tape is wound uniformly on the base pipe at a certain winding angle and a certain winding tension. In order to achieve the reinforcement effect, the reinforcing tape needs to be fused and bonded to the base pipe.

[0003] Current production processes typically involve preheating the reinforcing strip and the base tube, followed by spirally winding the reinforcing strip onto the base tube surface as the base tube is linearly conveyed and the winding machine rotates, forming a stable composite tube structure after cooling. However, this forming method has the following main drawbacks:

[0004] 1. Gap problem caused by changes in the width of the reinforcing belt:

[0005] During the winding process, the reinforcing strip needs to maintain a certain tension, which causes the preheated reinforcing strip to stretch and narrow. After being wound onto the surface of the base pipe, gaps may appear between adjacent reinforcing strips, thus affecting the overall quality and reinforcement effect of the composite pipe.

[0006] 2. Quality problems of the base pipe caused by thermal deformation and traction force:

[0007] During the linear transport of the base tube, it is subjected to continuous traction force. For preheated base tubes, thermal deformation is more likely to occur, especially under the influence of traction force. The base tube may be overstretched, thereby impairing the dimensional accuracy and mechanical properties of the final product. Summary of the Invention

[0008] This invention addresses the aforementioned problems in the existing technology by proposing a fixed ultrasonic welding machine for reinforcing strips of plastic composite pipes that ensures no deformation of the base pipe and controlled gaps between adjacent reinforcing strips.

[0009] This utility model can be achieved through the following technical solutions:

[0010] A fixed ultrasonic welding machine for reinforcing plastic composite pipes includes:

[0011] The mounting plate has a through hole in the center for the base tube to pass through, and the surface of the base tube has a spirally wound reinforcing strip;

[0012] An ultrasonic welding mechanism, comprising at least three units evenly distributed on the mounting plate, includes a welding head for contacting and applying pressure to the reinforcing strip on the surface of the base tube. The high-frequency vibration of the welding head generates frictional heat at the joint surface between the reinforcing strip and the base tube or between adjacent reinforcing strips, thus achieving welding.

[0013] The total contact perimeter between each of the welded joints and the base pipe is greater than or equal to the perimeter of the base pipe.

[0014] As a further improvement of this utility model, the welding head is mounted on the ultrasonic welding mechanism via a mounting bracket, and both ends of the welding head are rotatably connected to the mounting bracket via a rotating shaft structure.

[0015] As a further improvement of this utility model, the circumferential surface of the welding head is set as an arc-shaped surface with the same curvature as the base pipe. The welding head is driven to rotate by the friction force generated when the base pipe is transported in a straight line through the arc-shaped surface and the surface of the base pipe.

[0016] As a further improvement of this utility model, each of the welding heads can be arranged on the same plane along the axial direction of the base pipe, or staggered.

[0017] As a further improvement of this utility model, the ultrasonic welding mechanism further includes a radial adjustment component disposed on the mounting plate, the welding head being disposed on the radial adjustment component, and the distance between the welding head and the base tube being adjusted by the radial adjustment component.

[0018] As a further improvement of this utility model, the radial adjustment component includes:

[0019] A radial linear module is disposed on the mounting plate, and the radial linear module is perpendicular to the base tube;

[0020] A radial moving seat is disposed on the sliding seat of the radial linear module. The sliding seat is driven by a motor to move and move the radial moving seat closer to or away from the base tube.

[0021] As a further improvement of this utility model, the ultrasonic welding mechanism further includes a transducer and an amplitude transformer, wherein the transducer, the amplitude transformer, the mounting bracket, and the welding head are connected in sequence.

[0022] As a further improvement of this utility model, the transducer is disposed on the radial moving seat, and the welding head is disposed facing the base tube and the two are perpendicular to each other.

[0023] As a further improvement of this utility model, a pressure sensor is installed between the radial moving seat and the sliding seat, and a spring is sleeved on the pressure sensor, with the two ends of the spring abutting against the radial moving seat and the sliding seat respectively.

[0024] As a further improvement of this utility model, each of the ultrasonic welding mechanisms is distributed on the mounting plate in an axisymmetric or centrally symmetrical manner.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Ensure welding quality: The total contact circumference of the base pipe of each welding head is greater than or equal to the circumference of the base pipe. Therefore, the base pipe only needs to be conveyed in a straight line, and the welding head can cover and weld the reinforcing strip on the entire circumference of the base pipe. This design not only simplifies the operation process of the equipment, but also significantly improves the uniformity and reliability of welding, ensuring the high quality standard of the final product.

[0027] 2. Rotation mechanism of the welding head: The welding head has a rotation function. Driven by the friction force generated when the base tube is transported in a straight line, the welding head rotates. The rotation mechanism of the welding head reduces the friction between it and the base tube, avoids damage to the surface of the reinforcing strip, and also extends the service life of the welding head.

[0028] 3. Ensure the quality of composite pipe: Ultrasonic welding is only performed on the contact surface between the reinforcing strip and the base pipe, as well as the contact surface of adjacent reinforcing strips. It is not necessary to preheat the reinforcing strip and the base pipe separately. This avoids the problem of the reinforcing strip being stretched under tension after preheating, which would cause the gap between adjacent strips to change after winding. It also avoids the problem of the base pipe being stretched and deformed due to heat during the forward pulling process, thus ensuring the quality of the formed composite pipe.

[0029] 4. Reduced costs: Since it is not necessary to heat the reinforcing strip and the base tube separately, the corresponding heating equipment is reduced. In particular, when preheating the base tube, an infrared heating cylinder for the base tube to pass through is required. Such an infrared heating cylinder is expensive. However, this application only requires a few ultrasonic welding mechanisms, which greatly reduces production costs.

[0030] 5. Energy-saving and efficient: Compared with traditional heating and welding, ultrasonic welding consumes less energy, has a faster welding speed, and is also more environmentally friendly and safer;

[0031] 6. Precise control of welding pressure: Through the combination of spring and pressure sensor, the contact pressure between the welding head and the base tube can be precisely controlled to ensure that the pressure applied during the welding process is neither too high nor too low, thereby improving the welding quality and consistency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a fixed plastic composite pipe reinforcing ultrasonic welding machine according to Embodiment 1 of this utility model;

[0033] Figure 2 This is the utility model Figure 1 A structural diagram from another perspective;

[0034] Figure 3 This is a schematic diagram of the structure of the fixed plastic composite pipe reinforcing ultrasonic welding machine according to Embodiment 2 of this utility model;

[0035] Figure 4 This is a structural schematic diagram of a fixed plastic composite pipe reinforcing ultrasonic welding machine according to Embodiment 3 of this utility model.

[0036] In the diagram, 100 is the mounting plate; 200 is the ultrasonic welding mechanism; 210 is the welding head; 211 is the amplitude transformer; 212 is the transducer; 220 is the mounting bracket; 230 is the radial linear module; 231 is the sliding seat; 232 is the motor; 240 is the radial moving seat; 250 is the pressure sensor; 251 is the spring; and 300 is the base tube. Detailed Implementation

[0037] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0038] Example 1

[0039] like Figure 1-2 As shown, this utility model provides a fixed ultrasonic welding machine for reinforcing plastic composite pipes, comprising:

[0040] Mounting plate 100 is fixedly installed and has a through hole in the center for the base tube 300 to pass through. The surface of the base tube 300 has a spirally wound reinforcing strip.

[0041] The ultrasonic welding mechanism 200 is provided with at least three and evenly distributed on the mounting plate 100. The ultrasonic welding mechanism 200 includes a welding head 210, which is used to contact and apply pressure to the reinforcing strip on the surface of the base tube 300. The high-frequency vibration of the welding head 210 generates frictional heat at the joint surface between the reinforcing strip and the base tube 300 or between adjacent reinforcing strips and welds them.

[0042] The total contact perimeter of each welding head 210 with the base pipe 300 is greater than or equal to the perimeter of the base pipe 300, meaning that each welding head 210 can cover and weld the reinforcing strip on the entire perimeter of the base pipe 300.

[0043] It should be noted that in the existing technology, the reinforcing strip and the base tube 300 need to be preheated separately. Then, with the linear conveying of the base tube 300 and the rotation of the winding machine, the winding machine can spirally wind the reinforcing strip onto the surface of the base tube 300. However, this forming method has two problems. First, the preheated reinforcing strip becomes narrower due to stretching during winding, resulting in gaps between adjacent reinforcing strips after winding. Second, the preheated base tube 300 is prone to thermal deformation due to the traction force during linear conveying, which can lead to excessive stretching of the base tube 300.

[0044] In contrast, in this solution, when the base tube 300 passes through the mounting plate 100, its surface is already wrapped with multiple layers of reinforcing strips. That is, the welding machine provided in this embodiment only has the welding function. In actual operation, as the base tube 300 is conveyed in a straight line, the welding head 210 is in place and performs ultrasonic welding on the surface of the base tube 300. This method does not require preheating of the base tube 300 and the reinforcing strip, thus avoiding the problems caused by preheating of both in the prior art.

[0045] Furthermore, since the total contact circumference of the base tube 300 of each welding head 210 is greater than or equal to the circumference of the base tube 300, the base tube 300 only needs to be conveyed in a straight line, and the welding head 210 can cover and weld the reinforcing strip on the entire circumference of the base tube 300. This design not only simplifies the operation process of the equipment, but also significantly improves the uniformity and reliability of the welding, ensuring the high quality standard of the final product.

[0046] In summary, the ultrasonic welding machine provided in this embodiment has at least the following advantages:

[0047] 1. Ensure the quality of the composite pipe: Ultrasonic welding is only performed on the contact surface between the reinforcing strip and the base pipe 300, as well as the contact surface of adjacent reinforcing strips. It is not necessary to preheat the reinforcing strip and the base pipe 300 separately. This avoids the problem of the reinforcing strip being stretched under tension after preheating, which would cause the gap between adjacent strips to change after winding. It also avoids the problem of the base pipe 300 being stretched and deformed due to heat during the forward pulling process, thus ensuring the quality of the composite pipe after molding.

[0048] 2. Cost reduction: Since it is not necessary to heat the reinforcing strip and the base tube 300 separately, the corresponding heating equipment is reduced. In particular, when preheating the base tube 300, an infrared heating tube is required for the base tube 300 to pass through, which is expensive. However, this application only requires a number of ultrasonic welding mechanisms 200, which greatly reduces production costs.

[0049] 3. Ensure welding quality: The total contact circumference of the base tube 300 of each welding head 210 is greater than or equal to the circumference of the base tube 300. Therefore, the base tube 300 only needs to be conveyed in a straight line, and the welding head 210 can cover and weld the reinforcing strip on the entire circumference of the base tube 300. This design not only simplifies the operation process of the equipment, but also significantly improves the uniformity and reliability of welding, ensuring the high quality standard of the final product.

[0050] 4. Energy-saving and efficient: Compared with traditional heating and welding, ultrasonic welding consumes less energy, has a faster welding speed, and is also more environmentally friendly and safer.

[0051] Preferably, the welding head 210 is mounted on the ultrasonic welding mechanism 200 via the mounting bracket 220. The two ends of the welding head 210 are rotatably connected to the mounting bracket 220 via a rotating shaft structure, which enables the welding head 210 to have a self-rotation function. As the base tube 300 is linearly conveyed, the friction force generated drives the self-rotation. The self-rotation mechanism of the welding head 210 reduces the friction between it and the base tube 300, avoids damage to the surface of the reinforcing strip caused by the welding head 210, and also extends the service life of the welding head 210.

[0052] Furthermore, the circumferential surface of the welding head 210 is set as an arc-shaped surface with the same curvature as the base tube 300. This means that the welding head 210 can fit tightly with the surface of the base tube 300, ensuring that ultrasonic energy can be uniformly applied to the joint surface between the reinforcing strip and the base tube 300 or between adjacent reinforcing strips.

[0053] In summary, the circumferential surface of the welding head 210 is set as an arc surface with the same curvature as the base tube 300, and combined with its rotation mechanism, it greatly improves the stability and reliability of the welding process, while also helping to maintain high-quality welding results and extend the service life of the equipment.

[0054] Preferably, each welding head 210 can be arranged on the same plane along the axial direction of the base tube 300, or staggered. Both arrangements can ensure welding quality and can be flexibly adjusted according to specific production needs.

[0055] Preferably, the ultrasonic welding mechanism 200 also includes a radial adjustment component disposed on the mounting plate 100, and the welding head 210 is disposed on the radial adjustment component. The distance between the welding head 210 and the base tube 300 is adjusted by the radial adjustment component. This design allows base tubes 300 of different specifications to be matched by adjusting the position of the welding head 210, which greatly enhances the application range and flexibility of the equipment.

[0056] Preferably, the radial adjustment component includes:

[0057] A radial linear module 230 is mounted on the mounting plate 100 and is perpendicular to the base tube 300.

[0058] The radial moving seat 240 is mounted on the sliding seat 231 of the radial linear module 230. The sliding seat 231 is driven to move by the motor 232, which in turn drives the radial moving seat 240 to move closer to or further away from the base tube 300.

[0059] Furthermore, the ultrasonic welding mechanism 200 also includes a transducer 212 and an amplitude transformer 211. The transducer 212, amplitude transformer 211, mounting bracket 220, and welding head 210 are connected in sequence. The transducer 212 is mounted on the radial moving seat 240, and the welding head 210 is positioned facing the base tube 300 and perpendicular to it. Thus, the distance between the welding head 210 and the base tube 300 can be adjusted by the radial linear module 230. This allows the equipment to be adapted to base tubes 300 of different specifications, and also allows for adjustment of the contact pressure between the welding head 210 and the base tube 300, thereby improving the welding quality.

[0060] Preferably, a pressure sensor 250 is installed between the radial moving seat 240 and the sliding seat 231, and a spring 251 is sleeved on the pressure sensor 250. The two ends of the spring 251 abut against the radial moving seat 240 and the sliding seat 231, respectively.

[0061] The pressure sensor 250 is used to detect the pressure generated when the welding head 210 contacts the base tube 300. The function of the spring 251 is to provide a stable elastic force when the welding head 210 contacts the base tube 300, so as to ensure the contact pressure between the welding head 210 and the base tube 300.

[0062] Specifically, after the welding head 210 abuts against the surface of the base tube 300, the radial moving seat 240 continues to be driven in the same direction. At this time, the spring 251 is compressed and provides elastic force towards the base tube 300 to the welding head 210, forming welding pressure and feeding it back to the pressure sensor 250 until the pressure value received by the pressure sensor 250 is within the preset pressure range.

[0063] By combining the spring 251 and the pressure sensor 250, the contact pressure between the welding head 210 and the base tube 300 can be precisely controlled, ensuring that the pressure applied during the welding process is neither too high nor too low, thereby improving the welding quality and consistency.

[0064] Example 2

[0065] like Figure 3 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 eliminates the self-rotation mechanism of the welding head 210. During the linear conveying of the base tube 300, the welding head 210 always remains in place and welds the reinforcing strip.

[0066] Example 3

[0067] like Figure 4 As shown, the difference between Embodiment 3 and Embodiment 2 is that the ultrasonic welding mechanism 200 in Embodiment 2 adopts an axisymmetric distribution, while the ultrasonic welding mechanism 200 in Embodiment 3 adopts a centrally symmetrical distribution. Both of these arrangements can achieve uniform welding of the reinforcing strip.

[0068] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0069] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0070] Furthermore, in this utility model, descriptions involving "", "a", "one", etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "" or "a" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A fixed ultrasonic welding machine for reinforcing plastic composite pipes, characterized in that, include: The mounting plate has a through hole in the center for the base tube to pass through, and the surface of the base tube has a spirally wound reinforcing strip; An ultrasonic welding mechanism, comprising at least three units evenly distributed on the mounting plate, includes a welding head for contacting and applying pressure to the reinforcing strip on the surface of the base tube. The high-frequency vibration of the welding head generates frictional heat at the joint surface between the reinforcing strip and the base tube or between adjacent reinforcing strips, thus achieving welding. The total contact circumference between each of the welded joints and the base pipe is greater than or equal to the circumference of the base pipe.

2. The fixed-type ultrasonic welding machine for reinforcing plastic composite pipes according to claim 1, characterized in that, The welding head is mounted on the ultrasonic welding mechanism via a mounting bracket, and both ends of the welding head are rotatably connected to the mounting bracket via a rotating shaft structure.

3. The fixed-type ultrasonic welding machine for reinforcing plastic composite pipes according to claim 1, characterized in that, The circumferential surface of the welding head is set as an arc-shaped surface with the same curvature as the base pipe. The welding head is driven to rotate by the friction force generated when the base pipe is transported in a straight line through the arc-shaped surface and the surface of the base pipe.

4. The fixed-type ultrasonic welding machine for reinforcing plastic composite pipes according to claim 1, characterized in that, Each of the aforementioned welding heads may be located on the same plane along the axial direction of the base pipe, or may be staggered.

5. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 2, characterized in that, The ultrasonic welding mechanism further includes a radial adjustment assembly disposed on the mounting plate, and the welding head is disposed on the radial adjustment assembly, thereby adjusting the distance between the welding head and the base tube.

6. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 5, characterized in that, The radial adjustment component includes: A radial linear module is disposed on the mounting plate, and the radial linear module is perpendicular to the base tube; A radial moving seat is disposed on the sliding seat of the radial linear module. The sliding seat is driven by a motor to move and move the radial moving seat closer to or away from the base tube.

7. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 6, characterized in that, The ultrasonic welding mechanism also includes a transducer and an amplitude transformer, wherein the transducer, the amplitude transformer, the mounting bracket, and the welding head are connected in sequence.

8. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 7, characterized in that, The transducer is mounted on the radially movable seat, and the welding head is positioned facing the base tube and perpendicular to it.

9. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 6, characterized in that, A pressure sensor is installed between the radial moving seat and the sliding seat, and a spring is sleeved on the pressure sensor. The two ends of the spring abut against the radial moving seat and the sliding seat, respectively.

10. A fixed ultrasonic welding machine for reinforcing plastic composite pipes according to claim 1, characterized in that, Each of the ultrasonic welding mechanisms is distributed on the mounting plate in an axisymmetric or centrally symmetrical manner.

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