Plastic composite pipe reinforcing band laser welding device

Abstract

The utility model discloses a laser welding device for a reinforcing band of a plastic composite pipe, and belongs to the technical field of plastic pipe forming. The center of the rotary body is provided with a through hole for a base tube to pass through; the belt wheel is arranged on the rotary body, the belt wheel outputs the reinforcing belt to the surface of the base pipe, and the reinforcing belt is spirally wound on the surface of the base pipe at a preset winding angle along with the linear movement of the base pipe and the rotation of the rotary body; and the laser welding mechanism is arranged on the rotary body and faces the joint point of the reinforcing band and the base tube, and a laser beam emitted by the laser welding mechanism heats resin on the surface of the reinforcing band and the surface of the base tube to the melting temperature at the same time and enables the reinforcing band and the base tube to be welded together. Due to the fact that the reinforcing belts and the base pipe do not need to be preheated respectively, the problem that gaps between adjacent belts are changed after winding due to the fact that the preheated reinforcing belts are heated and stretched under the action of tension is solved, the problem that the base pipe is stretched and deformed due to heating in the forward traction process is also solved, and the quality of the formed composite pipe is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of plastic pipe forming, specifically relates to a plastic composite pipe reinforcing tape laser welding device. BACKGROUND

[0002] Plastic composite pipes are often prepared into reinforcing tapes by coating PE with glass fiber or polyester filament as reinforcing material, and the reinforcing tapes are uniformly wound on the pipes at a certain winding angle and a certain winding tension. In order to achieve the reinforcing effect, the reinforcing tapes need to be fusion bonded to the pipes.

[0003] The current production process usually includes preheating the reinforcing tapes and the pipes, and then the reinforcing tapes are spirally wound on the pipe surface by the winding machine along with the linear movement of the pipe and the rotating action of the winding machine, so that a stable composite pipe structure is formed after cooling. However, this forming method has the following main defects:

[0004] 1. Gap problem caused by the change of the width of the reinforcing tapes:

[0005] During the winding process, the reinforcing tapes need to maintain a certain tension, which will cause the preheated reinforcing tapes to be stretched and narrowed. When wound on the pipe surface, gaps may occur between adjacent reinforcing tapes, thereby affecting the overall quality and reinforcing effect of the composite pipe.

[0006] 2. Pipe quality problem caused by thermal deformation and traction force:

[0007] During the linear movement of the pipe, the pipe will be subjected to a continuous traction force. For the pipe that has been preheated, it is more prone to thermal deformation, especially under the influence of the traction force, the pipe may be excessively stretched, thereby damaging the dimensional accuracy and mechanical properties of the final product. INVENTION CONTENTS

[0008] The utility model is proposed to solve the above problems in the prior art, and provides a plastic composite pipe reinforcing tape laser welding device capable of ensuring that the pipe is not deformed and the gap between adjacent reinforcing tapes is controlled.

[0009] The utility model can be implemented by the following technical solutions:

[0010] A plastic composite pipe reinforcing tape laser welding device, comprising:

[0011] A rotating body having a through hole in the center for the passage of a base pipe;

[0012] A pulley arranged on the rotating body, the pulley outputs the reinforcing tapes to the surface of the base pipe, and the reinforcing tapes are spirally wound on the surface of the base pipe at a preset winding angle along with the linear movement of the base pipe and the rotation of the rotating body;

[0013] A laser welding mechanism is arranged on the rotary body and is arranged towards the joint position of the reinforcing belt and the base pipe, and a laser beam emitted by the laser welding mechanism simultaneously heats the resin on the surface of the reinforcing belt and the surface of the base pipe to a melting temperature and welds the two together.

[0014] As a further improvement of the utility model, the reinforcing belt and the base pipe form an included angle at the joint position of the two, and the laser welding mechanism is located on the side of the included angle formed by the two.

[0015] As a further improvement of the utility model, a plurality of mounting plates are arranged on the rotary body.

[0016] As a further improvement of the utility model, the laser welding mechanism is mounted on the mounting plate through a clamp, and a plurality of laser welding mechanisms can be integrated in one clamp to adapt to reinforcing belts of different widths.

[0017] As a further improvement of the utility model, the laser welding mechanism comprises a laser head and an optical device assembly, the laser head is rotatably connected with the optical device assembly, and the optical device assembly is movably arranged on the clamp.

[0018] As a further improvement of the utility model, the laser head generates uniformly distributed rectangular laser focal points, and the heating temperature and heating time of the laser on the resin are controlled by adjusting the laser power.

[0019] As a further improvement of the utility model, a pressure wheel mechanism is further arranged on each mounting plate.

[0020] As a further improvement of the utility model, the pressure wheel mechanism comprises a pressure wheel, and the pressure wheel is used for abutting against the joint position of the reinforcing belt and the base pipe to press the reinforcing belt.

[0021] As a further improvement of the utility model, the pressure wheel mechanism further comprises a linear motor and a connecting plate, the linear motor is arranged on the mounting plate, the connecting plate is connected with the linear motor, and the pressure wheel is arranged at the end of the connecting plate, the connecting plate is driven to move by the linear motor, and the pressure wheel is close to or away from the base pipe.

[0022] As a further improvement of the utility model, with the linear conveying of the base pipe and the rotation of the rotary body, each belt wheel synchronously conveys the reinforcing belt to the surface of the base pipe to form a multi-layer reinforcing belt structure, and each layer of the reinforcing belt structure is welded by an independent laser welding mechanism.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. Ensure the quality of the composite pipe: ultrasonic welding is only carried out on the contact surface of the reinforcing belt and the base pipe and the contact surface of adjacent reinforcing belts, and the reinforcing belt and the base pipe do not need to be heated separately, thereby avoiding the problem that the reinforcing belt after preheating is stretched under the action of tension due to heating, causing the gap between adjacent belts to change after winding, and avoiding the problem that the base pipe is stretched and deformed due to heating during forward traction, ensuring the quality of the composite pipe after forming;

[0025] 2. Reduce cost: due to the fact that the reinforcing belt and the base pipe do not need to be heated separately, the corresponding heating equipment is reduced, especially when preheating the base pipe, an infrared heating cylinder for the base pipe to pass through needs to be provided, which has a high cost, while the present application only needs to provide a plurality of laser welding mechanisms, greatly reducing the production cost;

[0026] 3. Improve production efficiency: laser welding is a fast and accurate connection method, which can complete the welding work simultaneously during the winding of the reinforcing belt, greatly shortening the production cycle and eliminating the need for additional cooling steps.

[0027] 4. Improve welding quality: laser welding can ensure that the welding surface of the base pipe and the reinforcing belt is uniformly heated, improving the welding quality;

[0028] 5. Strong adaptability: the laser welding mechanism can be flexibly adjusted according to different pipe diameters and reinforcing belt specifications, and is suitable for the manufacture of various types of plastic composite pipes, increasing the application range of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 is a structural schematic view of the plastic composite pipe reinforcing belt laser welding device of the present application;

[0030] Fig. 2 is a schematic view of the base pipe winding the reinforcing belt.

[0031] In the figure, 100, a rotary body; 110, a pulley; 111, a reinforcing belt; 112, a guide wheel; 120, a laser welding mechanism; 121, a clamp; 122, a laser head; 123, an optical device assembly; 124, a laser beam; 130, a mounting plate; 140, a pressure roller mechanism; 141, a pressure roller; 142, a linear motor; 143, a linear motor; 200, a base pipe. DETAILED DESCRIPTION

[0032] The following is a specific embodiment of the present application combined with the drawings, which further describes the technical method of the present application, but the present application is not limited to these embodiments.

[0033] As shown in Figs. 1-2 , the present application provides a plastic composite pipe reinforcing belt laser welding device, comprising:

[0034] A rotary body 100, the center of which has a through hole for the base pipe 200 to pass through;

[0035] A pulley 110 is arranged on the rotary body 100, the pulley 110 outputs the reinforcing belt 111 to the surface of the base pipe 200, and the reinforcing belt 111 is spirally wound on the surface of the base pipe 200 at a preset winding angle with the linear movement of the base pipe 200 and the rotation of the rotary body 100;

[0036] A laser welding mechanism 120 is arranged on the rotary body 100 and is arranged towards the joint position of the reinforcing belt 111 and the base pipe 200, and the laser beam 124 emitted by the laser welding mechanism 120 simultaneously heats the surface of the reinforcing belt 111 and the surface of the base pipe 200 to the melting temperature and welds them together.

[0037] It should be noted that in the prior art, the reinforcing belt 111 and the base pipe 200 need to be preheated respectively, and then the winding machine can spirally wind the reinforcing belt 111 on the surface of the base pipe 200 with the linear conveying of the base pipe 200 and the rotating action of the winding machine. The preheated reinforcing belt 111 and the base pipe 200 are fused during winding. However, this forming method has the following problems: on the one hand, the preheated reinforcing belt 111 is narrowed due to stretching during winding, resulting in gaps between adjacent reinforcing belts 111 after winding; on the other hand, the preheated base pipe 200 is easily deformed due to the action of the traction force during linear conveying, resulting in the problem of excessive stretching of the base pipe 200.

[0038] The laser welding device provided by the embodiment only performs laser heating and welding at the joint position of the reinforcing belt 111 and the base pipe 200, and compared with the preheating method of the reinforcing belt 111 and the base pipe 200 in the prior art, at least has the following advantages:

[0039] 1. Ensuring the quality of the composite pipe: only the contact surface of the reinforcing belt 111 and the base pipe 200 and the contact surface of adjacent reinforcing belts 111 are ultrasonically welded, and the reinforcing belt 111 and the base pipe 200 do not need to be preheated respectively, thereby avoiding the problem of changes in the gap between adjacent reinforcing belts 111 after winding due to the heated stretching of the preheated reinforcing belt 111 under tension, and avoiding the problem of stretching deformation of the base pipe 200 due to heating during forward traction, thereby ensuring the quality of the formed composite pipe;

[0040] 2. Reducing costs: since the reinforcing belt 111 and the base pipe 200 do not need to be heated separately, the corresponding heating equipment is reduced, especially when preheating the base pipe 200, an infrared heating cylinder needs to be provided for the base pipe 200 to pass through, and the cost of such an infrared heating cylinder is relatively high. However, the present application only needs to provide a plurality of laser welding mechanisms 120, thereby greatly reducing the production cost.

[0041] 3. Improve production efficiency: Laser welding is a fast and precise connection method, which can complete the welding work synchronously during the winding process of the reinforcing tape 111, greatly shortening the production cycle and not requiring additional cooling steps;

[0042] 4. Improve welding quality: Laser welding can ensure that the welding surface of the base pipe 200 and the reinforcing tape 111 is heated evenly, improving the welding quality;

[0043] 5. Strong adaptability: The laser welding mechanism 120 can be flexibly adjusted according to different pipe diameters and reinforcing tape 111 specifications, suitable for manufacturing various types of plastic composite pipes, increasing the application range of the equipment.

[0044] Preferably, the reinforcing tape 111 and the base pipe 200 form an angle at the joint position, and the laser welding mechanism 120 is located on the side of the angle formed by the two, ensuring that the laser beam 124 can directly irradiate the joint surface of the reinforcing tape 111 and the base pipe 200. Due to the high directionality and concentration of laser, such layout can make the laser energy more effectively concentrated in the area that needs to be heated, i.e. the joint surface of the resin layers of the base pipe 200 and the reinforcing tape 111, achieving precise heating and the purpose of welding;

[0045] This way not only improves the welding efficiency, but also reduces the impact on the surrounding materials because the heat is only concentrated in the welding area, avoiding unnecessary thermal deformation or damage.

[0046] Preferably, it also includes a mounting plate 130, which is provided with multiple mounting plates and is distributed on the rotary body 100 at intervals.

[0047] Preferably, the laser welding mechanism 120 is installed on the mounting plate 130 through a clamp 121, which not only provides stable support, but also gives the laser welding mechanism 120 certain adjustment ability, allowing it to adjust the position according to different processing requirements.

[0048] Among them, one clamp 121 can integrate multiple laser welding mechanisms 120 to adapt to reinforcing tapes 111 of different widths. It should be noted that since the laser beam 124 emitted by the laser welding mechanism 120 is a uniformly distributed rectangular laser focal point, the effective range of the laser beam 124 emitted by a single laser welding mechanism 120 is limited. When the width of the reinforcing tape 111 exceeds this range, multiple laser welding mechanisms 120 can be integrated on the same clamp 121 and arranged side by side, so that the multiple rectangular laser focal points emitted by them can cover the entire width of the reinforcing tape 111, ensuring that each part can be properly heat treated and welded. For narrower reinforcing tapes 111, the number of laser welding mechanisms 120 used can be reduced, thereby saving energy and reducing unnecessary heat input.

[0049] This design enables a device to flexibly cope with various specifications of the reinforcing tape 111, without frequent hardware replacement, and only needs to adjust the number and configuration of the laser welding mechanisms 120 to meet different production tasks, which is very important for quick switching of production lines and diversified product manufacturing.

[0050] Further, the laser welding mechanism 120 includes a laser head 122 and an optical device assembly 123, wherein,

[0051] The laser head 122 is rotatably connected to the optical device assembly 123 to adjust the inclination angle of the laser head 122. By adjusting the inclination angle of the laser head 122, the incident angle of the laser beam 124 can be optimized to ensure that the laser beam 124 can accurately irradiate the joint surface of the reinforcing tape 111 and the base pipe 200, improving the welding effect.

[0052] The optical device assembly 123 is movably arranged on the clamp 121 to adjust the distance between the laser head 122 and the welding site. The appropriate distance between the laser head 122 and the welding site is crucial for obtaining ideal welding quality, which not only helps to avoid excessive heating due to too close distance or energy loss caused by too far distance, but also ensures that the laser focal point always remains within the optimal working range, achieving uniform and efficient welding. By flexibly adjusting the working distance, the focusing degree of the laser beam 124 can be better controlled to ensure the accuracy of heat input during welding and reduce unnecessary heat-affected zones, and to ensure the welding quality.

[0053] In summary, the rotatable laser head 122 and the movable optical device assembly 123 provide highly flexible laser beam 124 positioning capability, not only improving the welding quality between the reinforcing tape 111 and the base pipe 200, but also being more flexible to cope with welding requirements in various complex situations, such as different diameters of the base pipe 200, different winding angles and widths of the reinforcing tape 111, greatly expanding the application range of the device.

[0054] In addition, by adjusting the laser power, the heating temperature and time of the laser on the resin can be controlled. The laser power directly affects the energy density of the laser beam 124, which in turn determines the degree of heating of the resin material, and indirectly affects the heating time. By precisely controlling the laser power, the optimal temperature and time combination for each welding point can be ensured, thereby improving the quality and strength of the weld, and the laser power can also be flexibly adjusted according to different materials and application requirements, so that the device can adapt to various production tasks, increasing its versatility and market competitiveness.

[0055] Preferably, the pressing wheel mechanism 140 is arranged on each mounting plate 130, and each reinforcing belt 111 is provided with a corresponding pressing wheel mechanism 140 and laser welding mechanism 120, so that the welding between each reinforcing belt 111 and the base pipe 200 is independent and does not interfere with each other, thereby ensuring the consistency and stability of the reinforcing belt 111 wound on the base pipe 200 and ensuring the optimal welding effect of the reinforcing belt 111 during the winding process.

[0056] Preferably, the pressing wheel mechanism 140 comprises a pressing wheel 141 for pressing the reinforcing belt 111 against the joint position of the reinforcing belt 111 and the base pipe 200, and the pressing wheel 141 is directly in contact with the reinforcing belt 111 to apply appropriate pressure when the reinforcing belt 111 is wound on the surface of the base pipe 200, thereby ensuring that the reinforcing belt 111 is tightly attached to the base pipe 200, and further improving the effect of hot melting of the resin layers of the reinforcing belt 111 and the base pipe 200.

[0057] Further, the pressing wheel mechanism 140 further comprises a linear motor 142 and a connecting plate 143, the linear motor 142 is arranged on the mounting plate 130, the connecting plate 143 is connected with the linear motor 142, and the pressing wheel 141 is arranged at the end of the connecting plate 143, and the linear motor 142 drives the connecting plate 143 to move and makes the pressing wheel 141 close to or away from the base pipe 200.

[0058] The position of the pressing wheel 141 is adjusted by the linear motor 142, which not only makes the pressing wheel mechanism 140 adaptable to base pipes 200 of different diameters, but also controls the pressure of the pressing wheel 141 on the base pipe 200, thereby ensuring that the reinforcing belt 111 can obtain the best fitting effect.

[0059] In addition, a plurality of guide wheels 112 are arranged on the mounting plate 130, which play a guiding role for the reinforcing belt 111, ensure the accuracy and stability of the conveying path of the reinforcing belt 111, and ensure that the reinforcing belt 111 maintains appropriate tension during the conveying process.

[0060] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above technical means, and also includes the technical scheme composed of any combination of the above technical features. The above is the specific implementation manner of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements are also regarded as the protection range of the utility model.

[0061] It should be noted that all directional indications (such as upper, lower, left, right, front, rear, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0062] In addition, the descriptions such as "one", "another", "at least one", etc. in the present application are only used for descriptive purposes, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the technical features indicated. Therefore, the features defined by "one", "another", "at least one" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0063] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing", etc. should be understood in a broad sense, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

Claims

1. A laser welding device for reinforcing strips of plastic composite pipes, characterized in that, include: A rotating body with a through hole at its center for the base tube to pass through; A pulley is provided on the rotating body. The pulley outputs a reinforcing belt to the surface of the base tube. As the base tube moves linearly and the rotating body rotates, the reinforcing belt is spirally wound around the surface of the base tube at a preset winding angle. A laser welding mechanism is arranged on the rotating body and facing the joint point of the reinforcing strip and the base tube. The laser beam emitted by the laser welding mechanism heats the resin on the surface of the reinforcing strip and the surface of the base tube to the melting temperature at the same time and welds the two together.

2. The laser welding device for reinforcing plastic composite pipes according to claim 1, characterized in that, The reinforcing strip and the base tube form an angle at their joint point, and the laser welding mechanism is located on the side where the angle is formed.

3. The laser welding device for reinforcing plastic composite pipes according to claim 1, characterized in that, It also includes mounting plates, which are arranged in multiple pieces and distributed at intervals on the rotating body.

4. The laser welding device for reinforcing plastic composite pipes according to claim 3, characterized in that, The laser welding mechanism is mounted on the mounting plate by a fixture, and one fixture can integrate multiple laser welding mechanisms to accommodate reinforcing strips of different widths.

5. The laser welding device for reinforcing strips of plastic composite pipes according to claim 4, characterized in that, The laser welding mechanism includes a laser head and an optical component assembly. The laser head is rotatably connected to the optical component assembly, and the optical component assembly is movably mounted on the fixture.

6. The laser welding device for reinforcing plastic composite pipes according to claim 5, characterized in that, The laser head generates a uniformly distributed rectangular laser focus, and the heating temperature and heating time of the resin are controlled by adjusting the laser power.

7. The laser welding device for reinforcing strips of plastic composite pipes according to claim 3, characterized in that, It also includes a pressure roller mechanism, and each of the mounting plates is provided with the pressure roller mechanism, the pulley and the laser welding mechanism.

8. The laser welding device for reinforcing plastic composite pipes according to claim 7, characterized in that, The pressure roller mechanism includes a pressure roller, which is used to press the reinforcing belt against the joint point between the reinforcing belt and the base tube.

9. The laser welding device for reinforcing strips of plastic composite pipes according to claim 8, characterized in that, The pressure roller mechanism also includes a linear motor and a connecting plate. The linear motor is mounted on the mounting plate, the connecting plate is connected to the linear motor, and the pressure roller is located at the end of the connecting plate. The linear motor drives the connecting plate to move and moves the pressure roller closer to or away from the base tube.

10. The laser welding device for reinforcing strips of plastic composite pipes according to claim 1, characterized in that, As the base tube is linearly conveyed and the rotating body rotates, each of the pulleys synchronously conveys the reinforcing belt to the surface of the base tube to form a multi-layer reinforcing belt structure. Each layer of the reinforcing belt structure is welded by an independent laser welding mechanism.

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