Production method and apparatus for continuously wound fiberglass pipes with fatigue and chemical resistance

Abstract

This invention discloses a method and apparatus for producing continuously wound fiberglass pipes with fatigue and chemical resistance. The method comprises the following steps: a driving device drives a mold to rotate, and then an anti-leakage membrane is wound onto the mold; a composite liquid of diallyl phthalate and unsaturated polyester resin is sprayed onto the anti-leakage membrane; chopped glass fibers are sprinkled onto the diallyl phthalate and unsaturated polyester resin composite liquid on the anti-leakage membrane; granular fillers such as quartz sand are sprinkled onto the outside of the chopped glass fibers; high-linear-density continuous fibers are wound around the outside of the chopped glass fibers and quartz sand, and then cured in a curing chamber using far-infrared and induction heating; after curing, the formed continuously wound fiberglass pipe is cut by a cutting device. This invention improves the pipe's density and thus its fatigue and chemical resistance by utilizing diallyl phthalate to enhance the adhesion of glass fibers and reduce the pipe's curing shrinkage rate.

Description

Technical Field

[0001] This invention relates to the field of continuous winding fiberglass pipe technology, specifically to a method and apparatus for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance. Background Technology

[0002] Continuously wound fiberglass pipes are produced by winding glass fibers onto a mold and then curing them. However, in existing technologies, as the amount and density of continuous glass fibers wound on the mold increase, the tension of the continuous glass fibers during winding also increases. Furthermore, as the continuous glass fibers pass through the guide rings and guide shafts, impurities tend to accumulate in the guide grooves over time, increasing resistance and making the wound glass fibers prone to breakage. Moreover, workers are also busy with pipe handling and other tasks during production, making it impossible to monitor the continuous glass fiber winding process in real time. Even small numbers of broken fibers may go unnoticed, further reducing the density of the winding and consequently lowering fatigue resistance and chemical resistance. Therefore, this paper proposes a production method and apparatus for continuously wound fiberglass pipes with improved fatigue and chemical resistance. Summary of the Invention

[0003] The purpose of this invention is to solve the above problems by proposing a method and apparatus for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a method for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance, characterized in that the production method steps are as follows:

[0005] 1) First, the driving device drives the mold to rotate, and then the leak-proof membrane is wrapped around the outer surface of the mold;

[0006] 2) Pour unsaturated polyester resin liquid onto the outer surface of the leak-proof membrane that rotates with the mold;

[0007] 3) Then, the chopped glass fibers are sprinkled axially onto the unsaturated polyester resin on the waterproof membrane in the set quantity;

[0008] 4) The quartz sand granular filler is sprinkled axially onto the chopped glass fiber according to the designed position, width and flow rate;

[0009] 5) Then, several continuous fibers are wound around the outside of chopped glass fiber and quartz sand, while a pressure roller is used to press and flatten the continuous fibers by pressing them tightly against the outer wall after they are wound.

[0010] During continuous fiber winding, a weighing sensor at the bottom of the continuous fiber is used to detect the remaining weight of the continuous fiber in real time and send the detected signal to the control module. When the weighing sensor at the bottom of the continuous fiber detects that the remaining weight of the continuous fiber has reached the set weight, the control module controls the alarm on the alarm module to sound an alarm, reminding the staff to prepare new continuous fibers in time to ensure uninterrupted winding of the continuous fiber and improve the tightness of the pipe winding.

[0011] The sensor uses a photoelectric sensor. When the continuous fiber is wound normally, the continuous fiber is in a taut state and will block the light beam, thus indicating that the continuous fiber is not broken. When the continuous fiber is broken, the continuous fiber is in a slack state and cannot block the light beam, thus indicating that the continuous fiber is broken. The sensor sends a signal to the control module, and the control module controls the alarm on the alarm module to sound an alarm and remind the staff to deal with it in time.

[0012] 6) The fiberglass pipe is heated and cured in the curing chamber; after curing, the formed continuous wound fiberglass pipe is cut by a cutting device.

[0013] It also includes a time module installed inside the load cell. When the load cell does not send a signal, but the control module receives signals from both the load cell and the time module, if the weight of the continuous fiber on the load cell does not change as time progresses on the time module, it indicates that the continuous fiber at that point has broken. The control module then activates the alarm on the alarm module to alert the worker to take timely action. Conversely, if the weight of the continuous fiber on the load cell decreases as time progresses on the time module, it indicates that the continuous fiber is winding normally and has not broken.

[0014] Preferably, the unsaturated polyester resin can be replaced with diallyl phthalate, or a mixture of unsaturated polyester resin and diallyl phthalate can be used to improve the adhesion of glass fiber and reduce curing shrinkage to form a dense structure, thereby improving the compactness of the tube and thus improving fatigue resistance and chemical resistance.

[0015] An apparatus for producing continuously wound fiberglass pipes with fatigue and chemical resistance properties is characterized by comprising: a wire frame for placing continuous fibers, a continuous fiber guide ring and a guide shaft for guiding the winding of continuous fibers, and a mold for facilitating the winding of fiberglass; a sensor for real-time sensing of the continuous fibers is installed on the continuous fiber guide ring; a weighing sensor for real-time sensing of the remaining weight of the continuous fibers is installed on the wire frame, and a control module connected to the sensor and the weighing sensor.

[0016] Preferably, the wire frame is also equipped with a tension adjustment frame for adjusting the tension of the continuous fibers.

[0017] Preferably, the control module is also connected to an alarm module and an alarm connected to the alarm module.

[0018] Preferably, a time module is also included within the weighing sensor.

[0019] The beneficial effects of this invention are: by utilizing diallyl phthalate to improve the adhesion of glass fibers and reduce the curing shrinkage rate of pipes to form a dense structure, the compactness of the pipe body is improved, thereby enhancing fatigue resistance and chemical resistance.

[0020] By using a weighing sensor to monitor the remaining weight of the continuous fiber roll in real time, workers can be reminded to prepare new continuous fiber rolls in advance to continue winding without gaps, thereby improving the compactness of the pipe winding and thus improving fatigue resistance and chemical resistance.

[0021] By using sensors to detect the breakage of continuous fiber winding in real time, a signal is sent directly when the continuous fiber breaks, which facilitates timely handling by workers, thereby improving the quality of fiberglass pipe winding, ensuring the compactness of continuous fiber winding, and thus improving fatigue resistance and chemical resistance. Attached image description:

[0022] Figure 1 This is a schematic diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the wire frame structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the present invention.

[0025] Legend: 1. Wire frame; 101. Weighing sensor; 102. Time module; 2. Continuous fiber guide ring; 201. Sensor; 3. Mold; 4. Control module; 5. Alarm module; 501. Alarm; 6. Guide shaft; 7. Tension adjustment frame. Detailed Implementation

[0026] The following description, in conjunction with the accompanying drawings, further illustrates the production method and apparatus for the continuously wound fiberglass pipe with fatigue resistance and chemical resistance described in this invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0028] In one embodiment, a method for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance:

[0029] 1) First, the driving device drives the mold to rotate, and then the anti-leakage membrane is wrapped around the outer surface of the mold 3;

[0030] 2) Apply unsaturated polyester resin to the outer surface of the leak-proof membrane as it rotates with mold 3;

[0031] 3) Then, the chopped glass fibers are sprinkled axially onto the unsaturated polyester resin on the waterproof membrane in the set quantity. The unsaturated polyester resin is used to make the chopped glass fibers stick to the outer surface of the waterproof membrane to prevent them from falling off.

[0032] 4) The quartz sand granular filler is sprinkled axially onto the chopped glass fiber according to the designed position, width and flow rate;

[0033] 5) Then, several continuous fibers are wound around the outside of chopped glass fiber and quartz sand, while a pressure roller is used to press and flatten the continuous fibers by pressing them tightly against the outer wall after they are wound.

[0034] During continuous fiber winding, the weighing sensor 101 at the bottom of the continuous fiber is used to detect the remaining weight of the continuous fiber in real time and send the detected signal to the control module 4. When the weighing sensor 101 at the bottom of the continuous fiber detects that the remaining weight of the continuous fiber has reached the set weight, the control module 4 controls the alarm 501 on the alarm module 5 to sound an alarm, reminding the staff to prepare new continuous fiber in time, ensuring that the continuous fiber is wound without interruption and improving the tightness of the pipe winding.

[0035] Sensor 201 uses a photoelectric sensor. When the continuous fiber is winding normally, the continuous fiber is in a taut state and will block the light beam, thus indicating that the continuous fiber is not broken. When the continuous fiber is broken, the continuous fiber is in a slack state and cannot block the light beam, thus indicating that the continuous fiber is broken. Sensor 201 sends a signal to control module 4, and control module 4 controls alarm 501 on alarm module 5 to sound an alarm, reminding staff to deal with it in time and prevent the pipeline from reducing the amount of continuous fiber winding, reducing the winding density, and thus reducing fatigue resistance and chemical resistance.

[0036] 6) Enter the curing chamber for heating and curing; after curing, the formed continuous wound fiberglass pipe is cut by a cutting device.

[0037] In one embodiment, diallyl phthalate is used instead of unsaturated polyester resin, or diallyl phthalate and unsaturated polyester resin are combined and then used. The diallyl phthalate is used to improve the adhesion of glass fiber and reduce the curing shrinkage rate of the pipe to form a dense structure, thereby improving the compactness of the pipe body and thus improving fatigue resistance and chemical resistance.

[0038] The technical solution using diallyl phthalate and the technical method using sensor 201 can be used simultaneously or selectively during the continuous winding of fiberglass pipes.

[0039] In one embodiment, a time module 102 is also included within the weighing sensor 101. When the sensor 201 does not send a signal, but the control module receives signals from the weighing sensor 101 and the time module 102, if the weight of the continuous fiber on the weighing sensor 101 does not change as time progresses on the time module 102, it indicates that the continuous fiber at that location has broken. The control module 4 then controls the alarm 501 on the alarm module 5 to sound an alarm, reminding the worker to handle the situation promptly. If the weight of the continuous fiber on the weighing sensor 101 decreases as time progresses on the time module 102, it indicates that the continuous fiber is winding normally and has not broken, thereby ensuring the tightness of the tube winding and improving fatigue resistance and chemical resistance.

[0040] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A method for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance, characterized in that: The production method steps are as follows: 1) First, the driving device drives the mold to rotate, and then the leak-proof membrane is wrapped around the outer surface of the mold; 2) Pour unsaturated polyester resin liquid onto the outer surface of the leak-proof membrane that rotates with the mold; 3) Then, the chopped glass fibers are sprinkled axially onto the unsaturated polyester resin on the waterproof membrane in the set quantity; 4) The quartz sand granular filler is sprinkled axially onto the chopped glass fiber according to the designed position, width and flow rate; 5) Then, several continuous fibers are wound around the outside of chopped glass fiber and quartz sand, while a pressure roller is used to press and flatten the continuous fibers by pressing them tightly against the outer wall after they are wound. When the continuous fiber is wound, the weighing sensor (101) at the bottom of the continuous fiber is used to detect the remaining weight of the continuous fiber in real time and send the detected signal to the control module (4). When the weighing sensor (101) at the bottom of the continuous fiber detects that the remaining weight of the continuous fiber reaches the set weight, the control module (4) controls the alarm (501) on the alarm module (5) to sound an alarm, reminding the staff to prepare new continuous fiber in time, ensuring that the continuous fiber is wound without interruption and improving the tightness of the pipe winding. The sensor (201) uses a photoelectric sensor. When the continuous fiber is normally wound, the continuous fiber is in a taut state and will block the light beam. Then it is determined that the continuous fiber is not broken. When the continuous fiber is broken, the continuous fiber is in a slack state and cannot block the light beam. Then it is determined that the continuous fiber is broken. The sensor (201) sends a signal to the control module (4). The control module (4) controls the alarm (501) on the alarm module (5) to sound an alarm and remind the staff to deal with it in time. 6) The fiberglass pipe is heated and cured in the curing chamber; after curing, the formed continuous wound fiberglass pipe is cut by a cutting device. It also includes a time module (102) installed in the weighing sensor (101). When the sensor (201) does not send a signal, but the control module receives the signals sent by the weighing sensor (101) and the time module (102), if the weight of the continuous fiber on the weighing sensor (101) does not change as time passes on the time module (102), it indicates that the continuous fiber has broken. The control module (4) controls the alarm (501) on the alarm module (5) to sound an alarm and remind the worker to handle it in time. When the weight of the continuous fiber on the weighing sensor (101) decreases as time passes on the time module (102), it indicates that the continuous fiber is winding normally and has not broken.

2. The method for producing a continuously wound fiberglass pipe with fatigue resistance and chemical resistance according to claim 1, characterized in that: The unsaturated polyester resin can also be replaced with diallyl phthalate, or a mixture of unsaturated polyester resin and diallyl phthalate can be used to improve the adhesion of glass fiber and reduce curing shrinkage to form a dense structure, thereby improving the compactness of the tube and thus improving fatigue resistance and chemical resistance.

3. An apparatus for producing continuously wound fiberglass pipes with fatigue and chemical resistance properties, characterized in that: The device is used to perform the production method as described in claim 1, including a wire frame (1) for placing continuous fibers, a continuous fiber guide ring (2) and a guide shaft for guiding the winding of continuous fibers, and a mold (3) for facilitating the winding of glass fibers; a sensor (201) for real-time sensing of continuous fibers is installed on the continuous fiber guide ring (2); a weighing sensor (101) for real-time sensing of the remaining weight of continuous fibers is installed on the wire frame (1), and a control module (4) connected to the sensor (201) and the weighing sensor (101).

4. The apparatus for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance according to claim 3, characterized in that: The wire frame (1) is also equipped with a tension adjustment frame (7) for adjusting the tension of continuous fibers.

5. The apparatus for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance according to claim 3, characterized in that: The control module (4) is also connected to an alarm module (5) and an alarm (501) connected to the alarm module (5).

6. The apparatus for producing continuously wound fiberglass pipes with fatigue resistance and chemical resistance according to claim 3, characterized in that: It also includes a time module (102) disposed within the weighing sensor (101).

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