Heating device for composite pipe before outer layer forming

Abstract

The utility model relates to a heating device for a composite pipe before outer layer forming. The heating device comprises a box body, a heating assembly, a temperature detection assembly and a control assembly, the box body is provided with a heating cavity; the heating assembly comprises a first electric heating piece and a second electric heating piece, the first electric heating piece is installed above the heating cavity, and the second electric heating piece is installed below the heating cavity; the temperature detection assembly is installed on the box body, and the detection end of the temperature detection assembly extends to the position above and below the discharging port. The control assembly is electrically connected with the temperature detection assembly. The control assembly is electrically connected with the first electric heating piece and the second electric heating piece. When the pipe is heated, the pipe is placed in the box body, and hot air in the box body has a flowing effect, so that in the pipe heating process, the temperature detection assembly detects the temperatures of the upper part and the lower part of the heated pipe guided out of the discharging opening, and the pipe is heated according to the temperature difference of the upper part and the lower part of the heated pipe; the control assembly controls the heating power of the first electric heating piece and the heating power of the second electric heating piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite pipe processing technical field especially relates to a heating device before outer layer forming of composite pipe. BACKGROUND

[0002] When the outer layer of the multi-layer composite pipe is formed, the outer wall of the inner layer pipe needs to be heated. At present, the inner layer pipe is usually placed in a heating device to make the outer wall of the inner layer pipe reach the hot melting temperature required for the outer layer pipe forming.

[0003] For example, the utility model patent (CN201920106617.X) proposes a heating device for a new type of steel wire mesh plastic composite pipe. The heating device includes a box body provided with an inlet pipe opening and an outlet pipe opening. The inlet pipe opening of the box body is provided with a heat insulation coaming. The heat insulation coaming is provided with a heat insulation cloth. The heat insulation cloth is provided with an opening for the pipeline to pass through. When the pipeline passes through the opening of the heat insulation cloth, the opening edge of the heat insulation cloth tightly abuts against the outer wall of the pipeline, so that the external cold air is not easy to enter the box body, avoiding the influence of the external cold air on the temperature in the box body, ensuring the sufficient heating of the steel wire mesh plastic composite pipe and the smooth progress of the subsequent process. The heat insulation coaming and the heat insulation cloth are made of heat insulation materials such as glass fiber and asbestos.

[0004] However, due to the upward flow characteristics of hot air, even if the box body is closed, the heat distribution in the box body is uneven, and the pipe material is unevenly heated. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a heating device before the outer layer forming of the composite pipe to solve the problems of the influence of the flow effect of the heated air, the difficulty in controlling the heat distribution in the box body, and the uneven heating of the pipe material.

[0006] The utility model provides a kind of heating device before outer layer forming of composite pipe, including box, heating assembly, temperature detection component and control component;The box has a heating cavity, the two sides of the box are respectively provided with the feed inlet and discharge port being communicated with the heating cavity, the feed inlet and the discharge port form a channel being penetrated through the heating cavity;The heating assembly includes first electric heating piece and second electric heating piece, the first electric heating piece is installed in the position above the heating cavity, and the second electric heating piece is installed in the position below the heating cavity;The temperature detection component is installed on the box, and the detection end of the temperature detection component extends above and below the discharge port, for detecting the temperature above and below pipe material after heating;The control component is electrically connected with the temperature detection component, for receiving the temperature signal above and below pipe material after heating, and the control component is electrically connected with the first electric heating piece and the second electric heating piece, for controlling the first electric heating piece and the second electric heating piece to act according to the temperature signal above and below pipe material after heating.

[0007] Further, the temperature detection component includes a first temperature sensor and a second temperature sensor, the first temperature sensor is installed at the side wall of the box and located above the discharge port, for detecting the temperature above pipe material after heating, and the second temperature sensor is installed at the side wall of the box and located below the discharge port, for detecting the temperature below pipe material after heating.

[0008] Further, the control component includes a first data receiver and a second data receiver, the first data receiver is electrically connected with the first temperature sensor, and the second data receiver is electrically connected with the second temperature sensor.

[0009] Further, the control component further includes a comparison module and a control module, the comparison module is connected with the first data receiver and the second data receiver, for calculating the temperature difference above and below pipe material, the comparison module is connected with the control module, and the control module is connected with the first electric heating piece and the second electric heating piece.

[0010] Further, it further includes fixedly arranged in the heating cavity and the screen net is cylindrical, the channel is arranged through the screen net, and the first electric heating piece and the second electric heating piece are arranged at the top and bottom of the screen net respectively.

[0011] Further, the first electric heating piece and the second electric heating piece all include a plurality of electric heating pipes, a plurality of the electric heating pipes are arranged uniformly around the channel, and the two ends of a plurality of the electric heating pipes are connected with the inner wall of the box.

[0012] Further, the heating assembly further comprises a plurality of connecting beams, each of the plurality of electric heating pipes is connected with the connecting beam away from one side of the channel, and the connecting beam is slidably connected with the sliding groove formed on the inner wall of the box body in the direction close to or away from the channel.

[0013] Further, the heating assembly further comprises a plurality of locking screws, each of the two ends of the connecting beam is provided with a locking screw, the locking screw passes through the strip-shaped groove formed on the outer wall of the box body and the sliding groove and is arranged in the threaded hole formed on the connecting beam, and the strip-shaped groove is arranged in the radial direction parallel to the channel.

[0014] Further, the box body comprises a base and a cover, one side of the base and the cover is connected through a hinge seat, and the other side of the base and the cover is detachably connected through a connecting piece.

[0015] Further, the connecting piece comprises a buckle fixed on the side wall of the cover and a buckle ring, the buckle ring is rotatably connected with the base, and the buckle ring can be rotated to the position where the buckle is clamped.

[0016] Compared with the prior art, the pipe material is placed in the box body, the first electric heating element heats the upper position of the heating cavity, and the second electric heating element heats the lower position of the heating cavity, so that the upper half and the lower half of the pipe material are heated respectively, and because of the flow effect of the hot air in the box body, the temperature detection assembly detects the temperature of the upper and lower parts of the heated pipe material guided out of the discharge port in the heating process, and according to the temperature difference between the upper and lower parts of the heated pipe material, the control assembly controls the heating power of the first electric heating element and the second electric heating element respectively, so that the heat in the box body is uniformly distributed, and the pipe material is well heated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A schematic structural view of the heating device for the outer layer of the composite pipe before forming is provided for the embodiments of the utility model;

[0018] Figure 2 A connection schematic view of the temperature detection assembly and the control assembly in the heating device for the outer layer of the composite pipe before forming is provided for the embodiments of the utility model;

[0019] Figure 3 A Figure 1 A sectional view of section A-A;

[0020] Figure 4 A Figure 1 An enlarged schematic view of part A. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0022] like Figure 1 As shown, the present invention provides a heating device for the outer layer of a composite pipe before molding, comprising a housing 100, a heating assembly 200, a temperature detection assembly 300, and a control assembly 400. The housing 100 has a heating chamber, and inlet 120 and outlet 130 are respectively provided on both sides of the housing 100, connecting the heating chamber 110, and a channel is formed between the inlet 120 and the outlet 130 through the heating chamber 110. The heating assembly 200 includes a first electric heating element 210 and a second electric heating element 220. The first electric heating element 210 is installed above the heating chamber 110, and the second electric heating element... 220 is installed below the heating chamber 110; the temperature detection component 300 is installed on the housing 100, and the detection end of the temperature detection component 300 extends above and below the discharge port 130 to detect the temperature above and below the pipe after heating; the control component 400 is electrically connected to the temperature detection component 300 to receive the temperature signals above and below the pipe after heating, and the control component 400 is electrically connected to the first electric heating element 210 and the second electric heating element 220 to control the operation of the first electric heating element 210 and the second electric heating element 220 according to the temperature signals above and below the pipe after heating.

[0023] In practice, the pipe is placed in the housing 100. The first electric heating element 210 heats the upper part of the heating chamber 110, and the second electric heating element 220 heats the lower part of the heating chamber 110, thereby heating the upper and lower parts of the pipe respectively. Due to the flow effect of hot air inside the housing 100, during the heating process of the pipe, the temperature detection component 300 detects the temperature of the upper and lower parts of the heated pipe discharged from the outlet 130. Based on the temperature difference between the upper and lower parts of the heated pipe, the control component 400 controls the heating power of the first electric heating element 210 and the second electric heating element 220 respectively, so that the heat distribution inside the housing 100 is uniform and the pipe is heated well.

[0024] In this embodiment, the housing 100 has a heating chamber. An inlet 120 and an outlet 130, respectively, are provided on both sides of the housing 100, connecting to the heating chamber 110. A channel is formed between the inlet 120 and the outlet 130, penetrating the heating chamber 110. The pipe is inserted into the heating chamber 110 through the inlet 120. After the heating assembly 200 has heated the pipe, the pipe exits through the outlet 130.

[0025] To facilitate installation of the pipe to be heated, in one embodiment, the box 100 comprises a base 111 and a cover 112, one side of the base 111 and the cover 112 being connected via a hinge seat 113, and the other side of the base 111 and the cover 112 being detachably connected via a connecting piece.

[0026] The connecting piece comprises a buckle 114 fixed to the side wall of the cover 112 and a clasp 115 rotatably connected to the base 111, the clasp 115 being capable of being rotated to a position where it is clamped with the buckle 114.

[0027] The heating assembly 200 in the present embodiment comprises a first electric heating element 210 and a second electric heating element 220, the first electric heating element 210 being installed at an upper position of the heating cavity 110, and the second electric heating element 220 being installed at a lower position of the heating cavity 110.

[0028] To avoid tools and other objects from falling and damaging the first electric heating element 210 and the second electric heating element 220 during installation of the pipe into the box 100, in one embodiment, a partition net 140 fixedly arranged in the heating cavity 110 in a cylindrical shape is further included, a passage being provided through the partition net 140, and the first electric heating element 210 and the second electric heating element 220 being arranged at the top and the bottom of the partition net 140, respectively.

[0029] As shown in FIG. 1, Figure 3 In one embodiment, the first electric heating element 210 and the second electric heating element 220 each comprise a plurality of electric heating pipes, the plurality of electric heating pipes being arranged uniformly in a circumferential direction around the passage, and both ends of the plurality of electric heating pipes being connected with the inner wall of the box 100.

[0030] In addition to adjusting the heating power of the electric heating pipes, the distance between the electric heating pipes and the pipe can also be adjusted to adapt to different heating requirements of different pipes, as shown in FIG. 2, Figure 4 In one embodiment, the heating assembly 200 further comprises a plurality of connecting beams 230, each of the plurality of electric heating pipes being connected with a connecting beam 230 on a side away from the passage, and the connecting beam 230 being slidably connected with a sliding groove 150 formed on the inner wall of the box 100 in a direction approaching or away from the passage.

[0031] The heating assembly 200 further comprises a plurality of locking screws 233, one locking screw 233 being arranged at each end of each connecting beam 230, the locking screw 233 passing through a strip-shaped groove 160 formed on the outer wall of the box 100 and the sliding groove 150 and being arranged in a threaded hole formed on the connecting beam 230, and the strip-shaped groove 160 being arranged in a radial direction parallel to the passage. By sliding the connecting beam 230, the distance between the electric heating pipes and the pipe can be controlled, and the locking screw 233 can be tightened to fix the connecting beam 230.

[0032] The connecting beam 230 is provided with a connecting rod 231 and a clamp 232. The clamp 232 is sleeved on the electric heating tube. One end of the connecting rod 231 is connected to the connecting beam 230, and the other end of the connecting rod 231 is connected to the clamp 232.

[0033] In this embodiment, the temperature detection component 300 is installed on the housing 100. The detection end of the temperature detection component 300 extends above and below the discharge port 130 to detect the temperature above and below the pipe after heating.

[0034] like Figure 2 As shown, in one embodiment, the temperature detection component 300 includes a first temperature sensor 310 and a second temperature sensor 320. The first temperature sensor 310 is installed on the side wall of the housing 100 and located above the discharge port 130, and is used to detect the temperature above the heated pipe. The second temperature sensor 320 is installed on the side wall of the housing 100 and located below the discharge port 130, and is used to detect the temperature below the heated pipe.

[0035] In this embodiment, the control component 400 is electrically connected to the temperature detection component 300 and is used to receive temperature signals above and below the pipe after heating. The control component 400 is also electrically connected to the first electric heating element 210 and the second electric heating element 220 and is used to control the operation of the first electric heating element 210 and the second electric heating element 220 according to the temperature signals above and below the pipe after heating.

[0036] In one embodiment, the control component 400 includes a first data receiver 410 and a second data receiver 420. The first data receiver 410 is electrically connected to a first temperature sensor 310, and the second data receiver 420 is electrically connected to a second temperature sensor 320. After receiving temperature signals from the first and second temperature sensors 310 and 320, the control component 400 further includes a comparison module and a control module. The comparison module, connected to the first and second data receivers 410 and 420, calculates the temperature difference between the top and bottom of the pipe. The comparison module is connected to the control module, which in turn is connected to the first and second electric heating elements. After comparison, when the temperature at the top of the heated pipe is higher than the temperature at the bottom, the control module controls the power of the first electric heating element 210 to decrease, and the control module controls the power of the second electric heating element 220 to increase, until the temperatures at the top and bottom of the heating chamber 110 are equal.

[0037] In practical applications, the control component 400 can employ two independent PID controllers. The first electric heating element 210 and the second electric heating element 220 each use independent PID controllers. The PID controllers are connected to the temperature sensor and the power adjustment device. The specific code settings are conventional techniques in the field and do not involve method improvements.

[0038] The following is an actual application code example:

[0039] ```python

[0040] # Code example

[0041] set_temperature = 220 # Set temperature

[0042] upper_temperature = read_upper_sensor() # Read upper temperature

[0043] lower_temperature = read_lower_sensor() # Read lower temperature

[0044] # Upper PID control

[0045] upper_error = set_temperature - upper_temperature

[0046] upper_integral += upper_error

[0047] upper_derivative = upper_error - upper_previous_error

[0048] upper_output = Kp * upper_error + Ki * upper_integral + Kd * upper_derivative

[0049] adjust_upper_power(upper_output) # Adjust upper power

[0050] upper_previous_error = upper_error

[0051] # Lower PID control

[0052] lower_error = set_temperature - lower_temperature

[0053] lower_integral += lower_error

[0054] lower_derivative = lower_error - lower_previous_error

[0055] lower_output = Kp * lower_error + Ki * lower_integral + Kd * lower_derivative

[0056] adjust_lower_power (lower_output) # adjust lower end power

[0057] lower_previous_error = lower_error

[0058] Compared with the prior art: the pipe material is placed in the box 100, the first electric heating element 210 heats the upper position of the heating cavity 110, and the second electric heating element 220 heats the lower position of the heating cavity 110, so as to heat the upper half and the lower half of the pipe material respectively, and due to the flow effect of the hot air in the box 100, the temperature detection assembly 300 detects the temperature of the upper and lower parts of the heated pipe material guided out from the discharge port 130 in the heating process, and the control assembly 400 controls the heating power of the first electric heating element 210 and the second electric heating element 220 respectively according to the temperature difference between the upper and lower parts of the heated pipe material, so that the heat in the box 100 is uniformly distributed, and the pipe material is heated well.

[0059] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A heating device for the outer layer of a composite pipe before molding, characterized in that, The box, the heating assembly, the temperature detection assembly and the control assembly are included. The box has a heating cavity, and feeding and discharging ports communicating with the heating cavity are respectively arranged on two sides of the box, and a channel penetrating through the heating cavity is formed between the feeding and discharging ports. The heating assembly includes first and second electric heating members, the first electric heating member is installed at an upper position of the heating cavity, and the second electric heating member is installed at a lower position of the heating cavity. The temperature detection assembly is installed on the box, and a detection end of the temperature detection assembly extends above and below the discharging port to detect the temperature above and below the heated pipe. The control assembly is electrically connected with the temperature detection assembly to receive the temperature signals above and below the heated pipe, and is electrically connected with the first and second electric heating members to control the first and second electric heating members according to the temperature signals above and below the heated pipe.

2. The heating device for the outer layer of the composite pipe before molding according to claim 1, characterized by The temperature detection assembly includes first and second temperature sensors, the first temperature sensor is installed at a side wall of the box and located at an upper position of the discharging port to detect the temperature above the heated pipe, and the second temperature sensor is installed at the side wall of the box and located at a lower position of the discharging port to detect the temperature below the heated pipe.

3. The heating device for the outer layer of the composite pipe before molding according to claim 2, characterized by The control assembly includes first and second data receivers, the first data receiver is electrically connected with the first temperature sensor, and the second data receiver is electrically connected with the second temperature sensor.

4. The heating device for the outer layer of the composite pipe before molding according to claim 3, characterized by The control assembly further includes a comparison module and a control module, the comparison module is connected with the first and second data receivers to calculate the temperature difference above and below the pipe, the comparison module is connected with the control module, and the control module is connected with the first and second electric heating members.

5. The heating device for the outer layer of the composite pipe before molding according to claim 1, wherein A separation net in a cylindrical shape is fixedly arranged in the heating cavity, the channel penetrates through the separation net, and the first and second electric heating members are arranged at the top and bottom of the separation net, respectively.

6. The heating device for the outer layer of the composite pipe before molding according to claim 4, wherein The first and second electric heating members each include a plurality of electric heating pipes, the plurality of electric heating pipes are uniformly arranged in a circumferential direction around the channel, and both ends of the plurality of electric heating pipes are connected with the inner wall of the box.

7. The heating device for the outer layer of the composite pipe before molding according to claim 6, wherein The heating assembly further includes a plurality of connecting beams, one connecting beam is connected to one side of each of the plurality of electric heating pipes away from the channel, and the connecting beam is slidingly connected with a sliding groove arranged on the inner wall of the box in a direction close to or away from the channel.

8. The heating device for the outer layer of the composite pipe before molding according to claim 7, wherein The heating assembly further includes a plurality of locking screws, one locking screw is arranged at each end of each of the connecting beams, the locking screw penetrates through a strip-shaped groove arranged on the outer wall of the box and the sliding groove and is arranged in a threaded hole arranged on the connecting beam, and the strip-shaped groove is arranged in a radial direction parallel to the channel.

9. The heating device for the outer layer of the composite pipe before molding according to claim 1, wherein The box includes a base and a cover, one side of the base and the cover is connected through a hinge seat, and the other side of the base and the cover is detachably connected through a connecting piece.

10. The heating device for the outer layer of the composite pipe before molding according to claim 9, wherein The connecting piece comprises a buckle fixed on the side wall of the cover body and a clasp ring, the clasp ring is rotationally connected with the base, and the clasp ring can rotate to a position where the clasp ring is clamped with the buckle.

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