Thermal insulation box temperature control system and method for composite pipe service life comprehensive evaluation and detection device

Abstract

The invention discloses a heat preservation box temperature control system and method for a composite pipe service life comprehensive evaluation and detection device, and relates to the technical field of composite material testing. The system comprises a heater used for heating a medium in a heat preservation box; the servo circulating pump is used for driving a medium in the heat preservation box to circularly flow; the plurality of circulating pipelines are connected to the servo circulating pump, and each circulating pipeline is provided with an electromagnetic valve; each rotatable spray head is communicated with the servo circulating pump through a circulating pipeline, and the spraying direction can be changed; the plurality of temperature sensors are distributed in the heat preservation box and are used for detecting the temperatures of different point positions in real time; and the controller is in signal connection with the plurality of temperature sensors, the servo circulating pump, the electromagnetic valves and the servo motors. According to the invention, high-precision, quick response and uniform control of the internal temperature field of the incubator can be realized, and the reliability and accuracy of a composite pipe service life evaluation experiment are ensured.

Description

Technical Field

[0001] This invention relates to the field of composite material testing and environmental simulation technology, specifically to a temperature control system and method for an insulation box used in a comprehensive evaluation and testing device for the service life of composite pipes. Background Technology

[0002] In the research and development and quality assessment of composite pipe materials, it is necessary to simulate their performance changes under harsh environments such as long-term high temperatures using a comprehensive service life evaluation testing device. These experiments are typically conducted inside an insulated chamber, requiring the temperature field within the chamber to remain highly uniform and stable over extended periods.

[0003] Existing temperature control technologies for insulated chambers mostly employ simple combinations of temperature controllers and heaters, lacking the ability to optimize and finely control the overall temperature field inside the chamber. This leads to the following common problems: (1) Uneven temperature distribution inside the chamber, with obvious cold and hot zones, affecting the accuracy of experimental data; (2) Lagging system response, unable to quickly compensate for temperature fluctuations; (3) Lack of adaptive capability when operating conditions change, making it difficult to guarantee control accuracy.

[0004] Therefore, there is an urgent need in this field for a solution that can achieve intelligent, high-precision, and uniform heating and temperature control for large-size insulated boxes under complex working conditions. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to overcome the shortcomings of the prior art and provide a temperature control system and method for an insulation box, so as to achieve high-precision, rapid response and uniform control of the internal temperature field of the insulation box, and ensure the reliability and accuracy of the composite pipe service life evaluation experiment.

[0006] The technical solution of this invention is as follows: A temperature control system for an insulation box used in a comprehensive evaluation and testing device for the service life of composite pipes includes: A heater is used to heat the medium inside the insulation box; A servo circulation pump is used to drive the medium inside the insulation box to circulate. Multiple circulation pipelines are connected to the servo circulation pump, and each circulation pipeline is equipped with a solenoid valve; Multiple rotatable nozzles, each of which is connected to the servo circulation pump via a circulation pipeline and is driven to rotate by a servo motor to change the spray direction; Multiple temperature sensors are distributed inside the insulation box to detect the temperature at different points in real time. The controller is connected to the multiple temperature sensors, servo circulating pumps, solenoid valves, and servo motors respectively.

[0007] The heater is electrically connected to a power regulator, which is signal-connected to the controller and used to adjust the input power of the heater.

[0008] The heater and servo circulation pump are placed at the bottom of the insulation box.

[0009] The medium in the circulation pipeline is water.

[0010] A method for controlling the temperature of an insulation chamber in a comprehensive evaluation and testing device for the service life of composite pipes, employing the insulation chamber temperature control system described above, includes the following steps: Step S1: Set the target ambient temperature and the required insulation time; Step S2: Real-time temperature monitoring at multiple points inside the insulation box using multiple temperature sensors, and calculation of the average temperature difference. Specifically: ; In the formula, Indicates the average temperature difference. This indicates the set ambient temperature. This indicates the actual temperature at each point. Indicates the number of points; Step S3: Based on the average temperature difference and the volume of the insulation box, calculate the required power setting of the heater and the set speed setting of the servo circulation pump. Step S4: Adjust the heater to the set power, adjust the servo circulation pump to the set speed, open the solenoid valve corresponding to the point to be heated, and adjust its rotatable nozzle to point to the area to be heated; Step S5: Monitor the temperature of each point in real time, and close the solenoid valve corresponding to the point that has reached the set temperature; when the real-time temperature difference of all points is less than ±0.1℃, turn off the heater and servo circulation pump, and return to step S2 to perform continuous heat preservation circulation.

[0011] In step S3, the required heater setting power P is specifically as follows: ; In the formula, P represents the set power. The value represents the volume of the insulated box, 1000 is the density of water, 4.18 is the specific heat capacity of water, and t is the required heating time.

[0012] In step S3, the set rotational speed n of the servo circulating pump is specifically as follows: ; In the formula, This is the proportionality coefficient.

[0013] The technical advantages of this invention are as follows: 1. This invention achieves high uniformity and stability of the temperature field within the insulation chamber within a range of ±0.1℃ through multi-point temperature sensing and closed-loop control algorithms; 2. This invention improves the performance of large insulation chambers by controlling the heater and servo circulating pump, and by adding multiple solenoid valves, rotatable nozzles, and uniformly distributed temperature sensors, thus addressing the uneven temperature distribution and large temperature fluctuations in some areas, thereby improving the stability and accuracy of the testing experiments; 3. While achieving automatic continuous insulation, this invention also solves the problem of achieving stable and precise temperature control under complex working conditions by controlling the heater power and circulating pump speed. This saves costs.

[0014] The following will provide further explanation in conjunction with the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of the temperature control system of the insulation box for a comprehensive evaluation and testing device for the service life of composite pipes according to the present invention.

[0016] Figure 2 This is a real-time temperature curve of the insulated box during the control process of the present invention.

[0017] Figure 3 This is a control flowchart of the temperature control system for the insulated box of the present invention.

[0018] Reference numerals: 1-Heater; 2-Servo circulating pump; 3-Rotating nozzle; 4-Temperature sensor; 5-Solenoid valve; 6-Circulation pipeline. Detailed Implementation Example 1

[0019] like Figures 1-2 As shown, a temperature control system for an insulation box used in a comprehensive evaluation and testing device for the service life of composite pipes includes: Heater 1 is used to heat the medium inside the insulation box; Servo circulation pump 2 is used to drive the medium in the insulation box to circulate. Multiple circulation pipes 6 are connected to the servo circulation pump 2, and each circulation pipe 6 is equipped with a solenoid valve 5; Multiple rotatable nozzles 3, each of which is connected to the servo circulation pump 2 through a circulation pipe 6 and is driven to rotate by a servo motor to change the spray direction; Multiple temperature sensors 4 are distributed inside the insulation box to detect the temperature at different points in real time; The controller is connected to the multiple temperature sensors 4, the servo circulating pump 2, each solenoid valve 5, and each servo motor signal respectively.

[0020] In use, the controller calculates the current average temperature and the average temperature difference from the set temperature based on the readings of the multiple temperature sensors; based on the average temperature difference and the volume of the insulation box, it calculates the required heater power and servo circulation pump speed; it controls the output of the calculated heater power and controls the servo circulation pump to operate at the calculated speed; it controls the opening and closing of specific solenoid valves and the angle of the corresponding rotatable nozzles to perform targeted heating on areas where the temperature has not reached the target; when the temperature deviation from the set temperature at all monitoring points is less than a preset threshold, the heater and servo circulation pump are shut down, and the temperature detection cycle is restarted. This invention, through the control method of the heater and servo circulation pump, and by adding multiple solenoid valves, rotatable nozzles, and evenly distributed temperature sensors, improves the uneven temperature distribution and large temperature fluctuations in some areas of the large insulation box, thereby improving the stability and accuracy of the detection experiment. Example 2

[0021] Based on Example 1, in this embodiment, preferably, the heater is electrically connected to a power regulator, and the power regulator is signal-connected to the controller.

[0022] When the present invention is used, the heater is electrically connected to a power regulator, which is signal-connected to the controller and used to adjust the input power of the heater 1. Example 3

[0023] Based on Embodiment 1 or Embodiment 2, in this embodiment, preferably, the heater 1 and the servo circulation pump 2 are placed at the bottom of the insulation box.

[0024] When this invention is used, the heater 1 and the servo circulation pump 2 are placed at the bottom of the insulation box, which saves space and makes the system structure small. Example 4

[0025] Based on Example 1 or Example 3, in this example, preferably, the medium in the circulation pipeline 6 is water.

[0026] When this invention is used, the medium in the circulation pipeline 6 is water. Water has a high specific heat capacity, which makes it easy to quickly adjust the temperature. Example 5

[0027] like Figure 3 As shown, a method for controlling the temperature of an insulation box in a comprehensive evaluation and testing device for the service life of composite pipes, employing the insulation box temperature control system described above, includes the following steps: Step S1: Set the target ambient temperature and the required insulation time; Step S2: Real-time temperature monitoring at multiple points inside the insulation box using multiple temperature sensors 4, and calculation of the average temperature difference. Specifically: ; In the formula, Indicates the average temperature difference. This indicates the set ambient temperature. This indicates the actual temperature at each point. Indicates the number of points; Step S3: Based on the average temperature difference and the volume of the insulation box, calculate the required power setting of the heater and the set speed setting of the servo circulation pump. Step S4: Adjust the heater to the set power, adjust the servo circulation pump to the set speed, open the solenoid valve corresponding to the point to be heated, and adjust its rotatable nozzle to point to the area to be heated; Step S5: Monitor the temperature of each point in real time, and close the solenoid valve corresponding to the point that has reached the set temperature; when the real-time temperature difference of all points is less than ±0.1℃, turn off the heater and servo circulation pump, and return to step S2 to perform continuous heat preservation circulation.

[0028] In step S3, the required heater setting power P is specifically as follows: ; In the formula, P represents the set power. The value represents the volume of the insulated box, 1000 is the density of water, 4.18 is the specific heat capacity of water, and t is the required heating time.

[0029] In step S3, the set rotational speed n of the servo circulating pump is specifically as follows: ; In the formula, This is the proportionality coefficient.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A temperature control system for an insulation box used in a comprehensive evaluation and testing device for the service life of composite pipes, characterized in that, include: Heater (1) is used to heat the medium inside the insulation box; A servo circulation pump (2) is used to drive the medium in the insulation box to circulate. Multiple circulation pipes (6) are connected to the servo circulation pump (2), and each circulation pipe (6) is provided with a solenoid valve (5). Multiple rotatable nozzles (3), each of the rotatable nozzles (3) is connected to the servo circulation pump (2) through a circulation pipe (6) and is driven to rotate by a servo motor to change the spray direction; Multiple temperature sensors (4) are distributed inside the insulation box to detect the temperature at different points in real time. The controller is connected to the multiple temperature sensors (4), the servo circulating pump (2), each solenoid valve (5), and each servo motor signal respectively.

2. The temperature control system for the insulation box of the composite pipe service life comprehensive evaluation and testing device according to claim 1, characterized in that: The heater is electrically connected to a power regulator, which is signal-connected to the controller and is used to adjust the input power of the heater (1).

3. The temperature control system for the insulation box of the composite pipe service life comprehensive evaluation and testing device according to claim 1, characterized in that: The heater (1) and the servo circulation pump (2) are placed at the bottom of the heat preservation box.

4. The temperature control system for the insulation box of the composite pipe service life comprehensive evaluation and testing device according to claim 1, characterized in that: The medium in the circulation pipeline (6) is water.

5. A method for controlling the temperature of an insulation box in a comprehensive evaluation and testing device for the service life of composite pipes, comprising an insulation box temperature control system as described in any one of claims 1-4, characterized in that, Includes the following steps: Step S1: Set the target ambient temperature and the required insulation time; Step S2: Real-time temperature detection of multiple points inside the insulation box using multiple temperature sensors (4), and calculation of the average temperature difference. Specifically: ； In the formula, Indicates the average temperature difference. This indicates the set ambient temperature. This indicates the actual temperature at each point. Indicates the number of points; Step S3: Based on the average temperature difference and the volume of the insulation box, calculate the required power setting of the heater (1) and the set speed setting of the servo circulation pump (2); Step S4: Adjust the heater (1) to the set power operation, adjust the servo circulation pump (2) to the set speed operation, and open the solenoid valve (5) corresponding to the point to be heated, and adjust its rotatable nozzle (3) to point to the area to be heated; Step S5: Monitor the temperature of each point in real time, and close the solenoid valve (5) corresponding to the point that has reached the set temperature; when the real-time temperature difference of all points is less than ±0.1℃, turn off the heater (1) and the servo circulation pump (2), and return to step S2 to perform continuous heat preservation circulation.

6. The method for temperature control of the insulation box in a composite pipe service life comprehensive evaluation and testing device according to claim 5, characterized in that, In step S3, the required power P of the heater (1) is specifically as follows: ； In the formula, P represents the set power. The value represents the volume of the insulated box, 1000 is the density of water, 4.18 is the specific heat capacity of water, and t is the required heating time.

7. The method for temperature control of the insulation box in a composite pipe service life comprehensive evaluation and testing device according to claim 5, characterized in that, In step S3, the set rotational speed n of the servo circulating pump (2) is specifically as follows: ； In the formula, K is the proportionality coefficient.

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