Ultrasonic welding device for reinforcing band of plastic composite pipe

Abstract

The utility model discloses an ultrasonic welding device for a reinforcing band of a plastic composite pipe, and belongs to the technical field of plastic pipe forming. A through hole for a base tube to pass through is formed in the center of the rotary body; 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 to 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; the ultrasonic welding mechanism is arranged on the rotary body, a welding head of the ultrasonic welding mechanism compresses the reinforcing belt on the surface of the base pipe, and in the process that the reinforcing belt is spirally wound to the surface of the base pipe, an ultrasonic welding machine generates friction heat on the contact face of the reinforcing belt and the base pipe and enables the reinforcing belt and the base pipe to be welded. The reinforcing belt and the base pipe do not need to be preheated respectively, the situation that the preheated reinforcing belt is heated and stretched under the action of tension, and consequently the gap between adjacent belts changes after winding is avoided, the situation 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 pipe is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic pipe forming, and particularly relates to an ultrasonic welding device for an enhanced belt of a plastic composite pipe. Background Art

[0002] For plastic composite pipes, glass fiber or polyester filaments are commonly used as reinforcing materials to be coated with PE to prepare an enhanced belt. The enhanced belt is wound around the base pipe at a certain winding angle and a certain winding tension at a uniform speed. To achieve the reinforcement effect, the enhanced belt needs to be welded and adhered to the base pipe.

[0003] The prior art is to heat the enhanced belt and the base pipe separately before winding. After heating, with the linear transportation of the base pipe and the rotation of the rotating body, the enhanced belt can be spirally wound onto the surface of the base pipe for welding to form a composite pipe. However, this forming method has the following disadvantages:

[0004] 1. During the process of winding the enhanced belt onto the surface of the base pipe, there is tension, which causes the pre-heated enhanced belt to be pulled and narrowed. As a result, there are gaps between adjacent enhanced belts after winding onto the surface of the base pipe, affecting the quality of the base pipe.

[0005] 2. During the linear transportation of the base pipe, it is always subject to a certain traction force, and the pre-heated base pipe is prone to heat deformation problems. Especially under the action of the traction force, the base pipe will be stretched, affecting the quality of the base pipe. Summary of the Utility Model

[0006] The utility model aims at the above problems existing in the prior art, and provides an ultrasonic welding device for an enhanced belt of a plastic composite pipe that can ensure that the base pipe does not deform and the gaps between adjacent enhanced belts after winding are controlled.

[0007] The utility model can be realized by the following technical solutions:

[0008] An ultrasonic welding device for an enhanced belt of a plastic composite pipe, comprising:

[0009] A rotating body having a through hole in the center for the base pipe to pass through;

[0010] A belt pulley provided on the rotating body, and the belt pulley outputs the enhanced belt to the surface of the base pipe. With the linear movement of the base pipe and the rotation of the rotating body, the enhanced belt is spirally wound onto the surface of the base pipe at a preset winding angle.

[0011] An ultrasonic welding mechanism provided on the rotating body, and the welding head of the ultrasonic welding mechanism presses the enhanced belt against the surface of the base pipe. During the process of the enhanced belt being spirally wound onto the surface of the base pipe, the ultrasonic welding mechanism generates frictional heat at the contact surface between the enhanced belt and the base pipe and welds the two together.

[0012] As a further improvement of the present utility model, the welding point of the welding head is always located on the tangent side of the reinforcing strip transported to the surface of the base pipe.

[0013] As a further improvement of the present utility model, the contact surface of the welding head is set as an arc surface with the same curvature as the base pipe. During the process of the reinforcing strip being spirally wound onto the surface of the base pipe, the welding head always presses the reinforcing strip tightly against the surface of the base pipe.

[0014] As a further improvement of the present utility model, the number of the belt pulleys and the ultrasonic welding mechanisms are both set to be multiple and are respectively arranged evenly on the rotating body, and at least one ultrasonic welding mechanism is equipped on the side of any one of the belt pulleys.

[0015] As a further improvement of the present utility model, with the linear transportation of the base pipe and the rotation of the rotating body, multiple belt pulleys synchronously transport the reinforcing strip to the surface of the base pipe to form a single-layer or multi-layer reinforcing strip structure. At the same time, the reinforcing strip transported by each belt pulley is welded to the base pipe through an independent ultrasonic welding mechanism.

[0016] As a further improvement of the present utility model, the ultrasonic welding mechanism includes a moving component, a transducer, a horn, and the welding head. The transducer, the horn, and the welding head are connected in sequence, and the transducer is installed on the rotating body through the moving component.

[0017] As a further improvement of the present utility model, the direction of the welding head is perpendicular to the surface of the base pipe, and the linear distance between the welding head and the base pipe is adjusted through the moving component.

[0018] As a further improvement of the present utility model, the moving component includes:

[0019] A first moving seat, which is movably installed on a first linear module, and a second linear module is provided on the first moving seat;

[0020] A second moving seat, which is movably installed on the second linear module, and the transducer is arranged on the second moving seat.

[0021] As a further improvement of the present utility model, a pressure sensor is installed between the first moving seat and the second moving seat. At the same time, a spring is sleeved on the pressure sensor, and both ends of the spring are respectively abutted against the first moving seat and the second moving seat.

[0022] As a further improvement of the present utility model, after the first moving seat moves forward until the welding head abuts against the surface of the base pipe, the first moving seat is continuously driven in the same direction. At this time, the spring is compressed and provides an elastic force towards the base pipe to the welding head, forming a welding pressure and feeding it back to the pressure sensor until the pressure value received by the pressure sensor is within the preset pressure range.

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

[0024] 1. Continuous welding and forming: With the linear transportation of the base pipe and the rotation of the rotating body, the reinforcing belt is spirally wound around the base pipe, and at the same time, ultrasonic welding is performed on the contact surface between the reinforcing belt and the base pipe to achieve the purpose of connecting production.

[0025] 2. Ensure the forming quality of the pipe: Ultrasonic welding is only performed on the contact surface between the reinforcing belt and the base pipe, and it is not necessary to preheat the reinforcing belt and the base pipe separately. Therefore, the problem that the preheated reinforcing belt is stretched by heat under the action of tension, resulting in a change in the gap between adjacent belts after winding, is avoided. Also, the problem that the base pipe is stretched and deformed due to heat during the forward traction process is avoided, ensuring the quality of the formed pipe.

[0026] 3. Reduce costs: Since it is not necessary to heat the reinforcing belt and the base pipe separately, the corresponding heating equipment is reduced. Especially when preheating the base pipe, an infrared heating cylinder through which the base pipe passes needs to be set, and the cost of this infrared heating cylinder is relatively high. However, in this application, only several ultrasonic welding mechanisms need to be set, greatly reducing the production cost.

[0027] 4. Improve welding quality: Ultrasonic welding is performed on the contact surface between the reinforcing belt and the base pipe, which can ensure that the welding surfaces of the two are evenly heated and improve the welding quality.

[0028] 5. Energy-saving and efficient: Compared with traditional heating and fusion welding, ultrasonic welding consumes less energy, has a faster welding speed, and is also more environmentally friendly and safe.

[0029] 6. Precise control of welding pressure: Through the combination of a spring and a pressure sensor, the contact pressure between the welding head and the base pipe can be precisely controlled to ensure that the pressure applied during the welding process is neither too large nor too small, thereby improving the welding quality and consistency.

[0030] 7. Automatic adjustment: The control system can automatically adjust the pressure of the welding head according to actual needs, reducing the need for manual intervention.

[0031] 8. Improve welding consistency: The control system can ensure that the pressure during each welding remains consistent, improving the consistency of the welding quality. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of an ultrasonic welding device for a plastic composite pipe reinforcement belt of the present utility model;

[0033] Figure 2 is a schematic diagram of the winding method of the reinforcement belt and the position of the ultrasonic welding mechanism of the present utility model;

[0034] Figure 3 is a schematic structural diagram of the ultrasonic welding mechanism of the present utility model.

[0035] In the figure, 100 is a rotating body; 110 is a pulley; 111 is a reinforcement belt;

[0036] 200 is an ultrasonic welding mechanism; 210 is a welding head; 220 is a transducer; 230 is a horn; 240 is a first moving seat; 250 is a second moving seat; 260 is a servo motor; 261 is a coupling; 262 is a lead screw; 263 is a first slide rail; 264 is a first slider; 265 is a second slide rail; 266 is a second slider; 270 is a pressure sensor; 280 is a spring;

[0037] 300 is a base pipe. Specific embodiments

[0038] The following are specific embodiments of the present utility model and in conjunction with the accompanying drawings, the technical methods of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0039] As Figures 1-3 shown, the present utility model provides an ultrasonic welding device for a plastic composite pipe reinforcement belt, including:

[0040] A rotating body 100 having a through hole at its center for the base pipe 300 to pass through;

[0041] A pulley 110 provided on the rotating body 100, and the pulley 110 outputs a reinforcement belt 111 to the surface of the base pipe 300. As the base pipe 300 moves linearly and the rotating body 100 rotates, the reinforcement belt 111 is helically wound around the surface of the base pipe 300 at a preset winding angle;

[0042] An ultrasonic welding mechanism 200 provided on the rotating body 100, and the welding head 210 of the ultrasonic welding mechanism 200 presses the reinforcement belt 111 against the surface of the base pipe 300. During the process of the reinforcement belt 111 being helically wound around the surface of the base pipe 300, the ultrasonic welding mechanism 200 generates frictional heat at the contact surface between the reinforcement belt 111 and the base pipe 300 and welds the two together.

[0043] Compared with the prior art in which the reinforcement belt 111 and the base pipe 300 are separately heated before winding for automatic fusion welding to form a composite pipe after winding, the forming method provided by this application has at least the following advantages:

[0044] 1. Ensure the forming quality of the pipe: Ultrasonic welding is only carried out on the contact surface between the reinforcing tape 111 and the base pipe 300, without the need to preheat the reinforcing tape 111 and the base pipe 300 separately. Thus, it avoids the problem that the preheated reinforcing tape 111 is stretched by heat under the action of tension, resulting in changes in the gap between adjacent tapes after winding, and also avoids the problem that the base pipe 300 is stretched and deformed due to heat during the forward traction process, ensuring the quality of the formed pipe.

[0045] 2. Reduce costs: Since it is not necessary to heat the reinforcing tape 111 and the base pipe 300 separately, the corresponding heating equipment is reduced. Especially when preheating the base pipe 300, an infrared heating cylinder through which the base pipe 300 passes needs to be set, and the cost of this kind of infrared heating cylinder is relatively high. While this application only needs to set several ultrasonic welding mechanisms 200, greatly reducing the production cost.

[0046] 3. Improve welding quality: Ultrasonic welding of the contact surface between the reinforcing tape 111 and the base pipe 300 can ensure that the welding surfaces of the two are evenly heated, improving the welding quality.

[0047] 4. Energy-saving and efficient: Compared with traditional heating and fusion welding, ultrasonic welding consumes less energy, has a faster welding speed, and is also more environmentally friendly and safe.

[0048] As a further improvement of the present utility model, the welding point of the welding head 210 is always located on the tangent side of the reinforcing tape 111 transported to the surface of the base pipe 300, ensuring that the reinforcing tape 111 is completely attached to the surface of the base pipe 300, maintaining the consistency of the welding process, and forming a smooth and continuous welding line. As the base pipe 300 is linearly transported and the rotary body 100 rotates, and during the process that the reinforcing tape 111 is helically wound on the surface of the base pipe 300, the welding head 210 always presses the reinforcing tape 111 against the surface of the base pipe 300 and synchronously realizes the purpose of continuous welding and forming.

[0049] As a further improvement of the present utility model, the contact surface of the welding head 210 is set as an arc surface with the same curvature as the base pipe 300. During the process that the reinforcing tape 111 is helically wound onto the surface of the base pipe 300, the welding head 210 can closely fit the surface of the base pipe 300, ensuring that the reinforcing tape 111 can maintain good contact with the surface of the base pipe 300 throughout the welding process, thereby improving the stability and welding quality of the welding. And by ensuring the good contact between the reinforcing tape 111 and the surface of the base pipe 300, it can effectively reduce the bubbles and voids that may appear during the welding process, and further ensure the quality of the pipe.

[0050] As a further improvement of the present utility model, the number of belt pulleys 110 and ultrasonic welding mechanisms 200 are both set to be multiple and are evenly arranged on the rotary body 100 respectively, and at least one ultrasonic welding mechanism 200 is equipped on the side of any one belt pulley 110;

[0051] Specifically, with the linear transportation of the base pipe 300 and the rotation of the rotary body 100, multiple belt pulleys 110 synchronously transport the reinforcing belt 111 to the surface of the base pipe 300 to form a single-layer or multi-layer reinforcing belt 111 structure, improving the mechanical strength and pressure resistance of the formed pipe. Among them,

[0052] The reinforcing belt 111 transported by each belt pulley 110 is welded by an independent ultrasonic welding mechanism 200, which means that each welding process is independently controlled. This simplifies the overall process flow, reduces complex synchronous control requirements, and also ensures that each layer of reinforcing belt 111 can be welded in a timely and high-quality manner, thereby improving the welding quality and consistency of the final product.

[0053] As a further improvement of the present utility model, the ultrasonic welding mechanism 200 includes an ultrasonic generator, a transducer 220, a horn 230, a welding head 210, and a moving component. The ultrasonic generator, transducer 220, horn 230, and welding head 210 are connected in sequence. The transducer 220 is installed on the rotary body 100 through the moving component. Specifically, the working principle of the ultrasonic welding mechanism 200 is as follows:

[0054] 1. Ultrasonic generator:

[0055] Responsible for converting the power frequency (50Hz or 60Hz) voltage into an ultrasonic frequency voltage, usually set at about 20kHz, to ensure that it can effectively propagate in plastic materials and generate sufficient vibration energy.

[0056] The operator inputs the welding parameters required by the process in the user interface to meet the welding requirements of different bandwidths or belt thicknesses.

[0057] 2. Transducer 220:

[0058] Converts high-frequency electrical energy into mechanical vibrations of the same frequency. Through the piezoelectric effect, the piezoelectric crystals inside the transducer 220 deform under the action of a high-frequency electric field, thereby generating mechanical vibrations.

[0059] 3. Horn 230:

[0060] The main function is to amplify the mechanical vibrations generated at the end of the transducer 220 and transmit the vibrations to the welding head 210. Another function is to provide a position for fixing the kit on the welding press. The length of the horn 230 needs to be half the wavelength or an integer multiple of half the wavelength of ultrasonic waves in its manufacturing material to ensure the efficiency of energy transfer.

[0061] As a further improvement of the present utility model, the direction of the welding head 210 is perpendicular to the surface of the base pipe 300 to ensure the maximization of the contact surface between the reinforcing strip 111 and the base pipe 300 during welding, guarantee the welding quality, and by adjusting the linear distance between the welding head 210 and the base pipe 300 through the moving component, base pipes 300 with different diameters can be adapted without replacing the equipment, thus improving the applicable range of the equipment.

[0062] As a further improvement of the present utility model, the moving component includes:

[0063] A first moving seat 240, which is movably installed on the first linear module, and a second linear module is provided on the first moving seat 240;

[0064] A second moving seat 250, which is movably installed on the second linear module, and the transducer 220 is arranged on the second moving seat 250.

[0065] Specifically, the first linear module is composed of a servo motor 260, a coupling 261, a lead screw 262, a first slide rail 263, and a first slider 264. The bottom of the second moving seat 250 is installed on the first slide rail 263 through the first slider 264. The servo motor 260 drives the lead screw 262 to rotate through the coupling 261, so that the second moving seat 250 can move along the first slide rail 263 through the first slider 264, achieving the purpose of adjusting the linear distance between the welding head 210 and the surface of the base pipe 300 until the welding head 210 presses the reinforcing strip 111 against the base pipe 300.

[0066] In addition, a second slide rail 265 is provided on the first moving seat 240, and a second slider 266 connected to the second slide rail 265 is provided at the bottom of the second moving seat 250.

[0067] As a further improvement of the present utility model, a pressure sensor 270 is installed between the first moving seat 240 and the second moving seat 250. At the same time, a spring 280 is sleeved on the pressure sensor 270, and both ends of the spring 280 are respectively abutted against the first moving seat 240 and the second moving seat 250. Among them,

[0068] The pressure sensor 270 is used to detect the pressure generated when the welding head 210 contacts the base pipe 300. The function of the spring 280 is to provide a stable elastic force when the welding head 210 contacts the base pipe 300 to ensure the contact pressure between the welding head 210 and the base pipe 300.

[0069] Specifically, when the first moving seat 240 moves forward until the welding head 210 abuts against the surface of the base pipe 300, continue to drive the first moving seat 240 in the same direction. At this time, the spring 280 is compressed and provides an elastic force towards the base pipe 300 to the welding head 210, forming a welding pressure and feeding it back to the pressure sensor 270 until the pressure value received by the pressure sensor 270 is within the preset pressure range.

[0070] Through the settings of the spring 280 and the pressure sensor 270, it has at least the following advantages:

[0071] 1. Precise control of welding pressure: Through the combination of the spring 280 and the pressure sensor 270, the contact pressure between the welding head 210 and the base pipe 300 can be precisely controlled to ensure that the pressure applied during the welding process is neither too large nor too small, thereby improving the welding quality and consistency.

[0072] 2. Automatic adjustment: The control system can automatically adjust the pressure of the welding head 210 according to actual needs, reducing the need for manual intervention.

[0073] 3. Improvement of welding consistency: Ensure that the pressure during each welding is consistent, improving the consistency of welding quality.

[0074] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is the specific implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present utility model.

[0075] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0076] In addition, in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0078] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

Claims

1. An ultrasonic welding device for plastic composite pipe reinforcement belt, characterized in that: include: A rotating body having a through hole at its center for the substrate pipe to pass through; A pulley is arranged on the rotating body, and the pulley outputs the reinforcement belt to the surface of the base pipe. With the linear movement of the base pipe and the rotation of the rotating body, the reinforcement belt is spirally wound onto the surface of the base pipe at a preset winding angle; An ultrasonic welding mechanism is arranged on the rotating body. The welding head of the ultrasonic welding mechanism presses the reinforcement belt against the surface of the base pipe. In the process of spirally winding the reinforcement belt onto the surface of the base pipe, the ultrasonic welding mechanism generates friction heat at the contact surface between the reinforcement belt and the base pipe and welds the two together.

2. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 1, characterized in that: The welding point of the welding head is always located on one side of the tangent line from which the reinforcement belt is conveyed to the surface of the base pipe.

3. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 1, characterized in that: The contact surface of the welding head is set to be an arc surface with the same curvature as the base pipe. When the reinforcement belt is spirally wound onto the surface of the base pipe, the welding head always presses the reinforcement belt against the surface of the base pipe.

4. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 1, characterized in that: The pulleys and the ultrasonic welding mechanisms are both provided in plural numbers and are evenly arranged on the rotating body, and at least one ultrasonic welding mechanism is provided on the side of any one of the pulleys.

5. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 1, characterized in that: With the linear conveyance of the base pipe and the rotation of the rotating body, multiple pulleys synchronously convey the reinforcement belt to the surface of the base pipe to form a single-layer or multi-layer reinforcement belt structure. At the same time, the reinforcement belt conveyed by each pulley is welded to the base pipe through the independent ultrasonic welding mechanism.

6. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 1, characterized in that: The ultrasonic welding mechanism comprises a moving assembly, a transducer, a horn and the welding head. The transducer, the horn and the welding head are connected in sequence. The transducer is installed on the rotating body through the moving assembly.

7. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 6, characterized in that: The direction of the welding head is perpendicular to the surface of the base pipe, and the linear distance between the welding head and the base pipe is adjusted by the moving component.

8. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 6, characterized in that: The mobile assembly comprises: A first movable seat is movably mounted on the first linear module, and a second linear module is disposed on the first movable seat; The second movable seat is movably mounted on the second linear module, and the transducer is arranged on the second movable seat.

9. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 8, characterized in that: A pressure sensor is installed between the first movable seat and the second movable seat, and a spring is sleeved on the pressure sensor, and two ends of the spring are respectively in contact with the first movable seat and the second movable seat.

10. The ultrasonic welding device for reinforcing strip of plastic composite pipe according to claim 9, characterized in that: When the first movable seat moves forward until the welding head abuts against the surface of the base pipe, the first movable seat continues to be driven in the same direction. At this time, the spring is compressed and provides elastic force in the direction of the base pipe to the welding head, forming welding pressure and feeding back to the pressure sensor until the pressure value received by the pressure sensor is within the preset pressure range.

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