Transparent hose heating device with self-feedback temperature control and self-adaptive reducing functions for nuclear power plant

Abstract

The invention relates to the technical field of nuclear power plant maintenance instrument control, and discloses a nuclear power plant self-feedback temperature control and self-adaptive reducing transparent hose heating device which comprises a controller and a heating mechanism which are electrically connected, the heating mechanism is provided with a fixing plate, the fixing plate is connected with a static handle, and a driving gear and a set of driven gears are installed on the fixing plate. The driving gear is an inner meshing gear, the group of driven gears are outer meshing gears and are meshed with the driving gear, each driven gear is connected with a heating copper sheet to rotate in the same direction, the heater heats the heating copper sheets, a rotating ring is arranged outside the driving gear, a movable handle is connected to the rotating ring, and a compression spring is arranged between the movable handle and the static handle. The pipeline connector can be softened in time, safe connection with an instrument is facilitated, the pipeline is stabilized on the instrument connector after being cooled, and the situation that the instrument is abnormal due to the fact that the pipeline is slightly damaged due to misoperation of the instrument pipeline is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of maintenance instrumentation and control of nuclear power plants, and in particular to a transparent hose heating device with self-feedback temperature control and adaptive diameter change in nuclear power plants. Background Art

[0002] For the differential pressure switches commonly found in the ventilation systems of nuclear power plants, when maintenance personnel are inspecting the instruments, due to improper installation of the instrument pipes, air leakage may occur at the instrument interface during production operations, causing the differential pressure switch to be falsely triggered, leading to unexpected closure of the valve or fan.

[0003] There is no method in the prior art for using a heating device to complete the safe assembly of instrument pipelines in nuclear power plants. Therefore, it is necessary to design a transparent hose heating device with self-feedback temperature control and adaptive diameter change in nuclear power plants to solve the above problems, which is of great significance for the safe assembly and maintenance convenience of instrument pipelines. Summary of the invention

[0004] The purpose of the present invention is to provide a transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant. The heating device can instantly soften the pipeline interface, which is convenient for safe connection with the instrument. After the pipeline is cooled, it is firmly fixed on the instrument joint. In this way, it is avoided that the instrument pipeline is slightly damaged due to improper operation, which may cause abnormal conditions in the instrument.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A transparent hose heating device with self-feedback temperature control and adaptive diameter change in a nuclear power plant comprises an electrically connected controller and a heating mechanism, wherein the heating mechanism has a fixed plate, the fixed plate is connected to a static handle, a driving gear and a group of driven gears are mounted on the fixed plate, the driving gear is an internal meshing gear, a group of driven gears are external meshing gears and mesh with the driving gear, each of the driven gears is connected to a heating copper sheet to rotate in the same direction, a heater heats the heating copper sheet, a rotating ring is arranged outside the driving gear, a dynamic handle is connected to the rotating ring, and a compression spring is arranged between the dynamic handle and the static handle.

[0007] In some embodiments, the heating mechanism has a heater storage box, and the heater is disposed in the heater storage box.

[0008] In some embodiments, the heater storage box is provided with a voltage input interface for connecting the positive and negative electrodes of an external power source to the positive and negative electrodes of the heater.

[0009] In some embodiments, the heater storage box is connected to the fixing plate via a bridge.

[0010] In some embodiments, the number of driven gears in a group is 4, and they are evenly distributed circumferentially at equal angles.

[0011] In some embodiments, the heating copper sheet is in the shape of an ox horn, and the bottom is connected to the driven gear. The inner arc of the heating copper sheet clamps and heats the transparent hose.

[0012] In some embodiments, each of the heating copper sheets is respectively connected and fastened to the driven gear at the corresponding position via copper columns and screws, so that when the driven gear rotates, it drives the heating copper sheets to rotate in the same direction.

[0013] In some embodiments, the controller includes an electrically connected TFTLCD screen, a power interface, an STM32 chip, buttons, an LED, a heater temperature collection interface, a transparent hose temperature collection interface, and a GPIO interface.

[0014] In some embodiments, the heater includes a 0.3μF capacitor, a positive tap, a copper wire, a relay, a negative tap, and an IGBT component. The three 0.3μF capacitors are connected in parallel, the collectors of the two IGBT components are connected to both ends of the capacitor, the gates of the two IGBT components are connected, and the emitters are connected to the negative tap.

[0015] In some embodiments, the movable handle and the static handle form an acute angle.

[0016] Compared with the prior art, the transparent hose heating device with self-feedback temperature control and adaptive diameter change for nuclear power plants provided by the present invention has the following beneficial effects:

[0017] The present invention can realize instant softening of the pipeline interface, which is convenient for safe connection with the instrument. After the pipeline is cooled, it is firmly fixed on the instrument joint, thus avoiding the abnormal situation of the instrument caused by slight damage to the instrument pipeline due to improper operation.

[0018] The adaptive diameter-changing clamp provided by the present invention adopts four horn-shaped copper sheets, which greatly improves the heat dissipation area and avoids heat accumulation. Under the continuous mechanism of spring, movable handle, rotating ring, driving gear and driven gear, the heating copper sheet can be gradually rotated counterclockwise to achieve the diameter-changing effect, and is suitable for transparent hoses of φ6 to φ12.

[0019] The present invention uses capacitors, IGBTs and copper wires to build a heating circuit, which has the advantages of controllable power, strong thermal conductivity and good ductility.

[0020] The present invention has a self-feedback temperature control function, which is reflected in the fact that the controller collects the surface temperature of the heating copper sheet and the transparent hose in real time, and updates and displays it in real time in the human-computer interaction interface. The heating process uses a PWM signal to control the start and stop of the heater, calculates the unit time increment of the surface temperature of the transparent hose and controls the PWM signal to ensure that the temperature is controllable. Maintenance personnel adjust the heating temperature range through key input to ensure that temperature control is achieved at the manual level.

[0021] Furthermore, the transparent hose temperature control logic provided by the invention has strong generalization ability, and the adaptive variable diameter clamp can ensure high heat absorption rate, high thermal conductivity and heat dissipation, providing convenience for maintenance personnel, strong safety, simple operation and easy maintenance.

[0022] The present invention proposes for the first time a technical solution for heating a transparent hose with self-feedback temperature control and adaptive diameter change. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for the technical description.

[0024] Figure 1 A schematic diagram of the structure of the controller provided by the present invention;

[0025] Figure 2 A flow chart of temperature control of a transparent hose provided by the present invention;

[0026] Figure 3 A flow chart of heater state control provided by the present invention;

[0027] Figure 4 A schematic diagram of the structure of the adaptive variable diameter clamp provided by the present invention;

[0028] Figure 5 A schematic diagram of the structure of the fixing plate provided by the present invention;

[0029] Figure 6 A schematic diagram of the initial state of the adaptive variable diameter clamp provided by the present invention;

[0030] Figure 7 This is a schematic structural diagram of the heater provided by the present invention. DETAILED DESCRIPTION

[0031] The following is further explained in detail through specific implementation methods.

[0032] like Figures 1 to 7As shown, the present invention provides a transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant, including a controller 1, a human-machine interface, and a heating mechanism 3. The device can collect the surface temperature of the copper sheet 3-2 and the transparent hose in real time, control the temperature increment of the transparent hose, and visualize it through the TFTLCD screen 1-1, so that maintenance personnel can obtain the heating status in real time. The heating mechanism 3 uses a horn-shaped copper sheet, which has strong thermal conductivity and heat dissipation performance, can adaptively retract to clamp the transparent hose, and is universal for pipeline sizes. The logic control and heating parameters are set for the controller 1 to ensure that transparent hoses of various sizes are evenly heated without generating hot spots. The present invention is of great significance for the safe installation and maintenance convenience of instrument pipelines.

[0033] like Figure 1 As shown, the controller 1 includes a TFTLCD screen 1-1, a power interface 1-2, an STM32 chip 1-3, a button 1-4, an LED 1-5, a heater temperature acquisition interface 1-6, a transparent hose temperature acquisition interface 1-7, and a GPIO interface 1-8.

[0034] STM32 chip 1-3 uses STM32F103RCT6, and uses a 5V external power supply to connect to the power interface 1-2 for power supply. Use a GPIO interface 1-8 to output and drive LED 1-5 to display the heating status, which lights up if it is in the heating state. Use two GPIO interfaces 1-8 as key 1-4 input channels to adjust the heating temperature range. Use a general counter to output PWM waveforms, and control the start and stop time of the heater by setting the duty cycle, thereby controlling the temperature increment of the transparent hose. The heater temperature acquisition interface 1-6 is connected to a DS18B20 temperature sensor to obtain the temperature of the heater. The transparent hose temperature acquisition interface 1-7 is also connected to a DS18B20 temperature sensor to obtain the surface temperature of the transparent hose.

[0035] like Figure 1 As shown, keys 1-4 include a RESET key, a KEY1 key, and a KEY2 key.

[0036] The human-computer interaction interface uses a 2.8-inch, 320*240 resolution TFTLCD module, which is directly powered by the single-chip microcomputer. The interface is a 16-bit 8080 parallel interface that can communicate with the single-chip microcomputer in parallel. In the TFTLCD LCD screen 1-1 display (the LCD screen is the human-computer interaction interface. The LCD screen, as a display function module, provides an interface for display and operation for human-computer interaction), the temperature of the heater and the surface temperature of the transparent hose, as well as the heating temperature range are displayed in real time. The first line of the screen is set to display "HeaterTemp:", the second line to display "Tube Temp:", and the third line to display "Heating Temp Range:". For the definition of the heating temperature range, the transparent hose is heated so that its temperature is within a range, and the temperature difference of the range is set to 5℃, for example, heated to 45~50℃, 50~55℃. The temperature range can be manually adjusted by pressing keys 1-4. The initial temperature is set at 70~75℃. Pressing KEY1 manually can reduce the upper and lower limits of the range by 5℃ at the same time, and pressing KEY2 can increase the upper and lower limits of the range by 5℃ at the same time. RESET is a reset button that can reset the controller 1 and restore the hardware to the initial state.

[0037] like Figures 4 to 7 As shown, the heating mechanism 3 includes an adaptive variable diameter clamp and a heater. The adaptive variable diameter clamp includes a driven gear 3-1, a copper sheet 3-2, a voltage input interface 3-3, a heater storage box 3-4, a bridge 3-5, a driving gear 3-6, a static handle 3-7, a compression spring 3-8, a dynamic handle 3-9, a rotating ring 3-10, and a fixed plate 3-11.

[0038] The driven gear 3-1 is an external meshing gear with 20 teeth and a root circle diameter of φ4 (the diameter of the circle is 4 mm); the driving gear 3-6 is an internal meshing gear with 40 teeth and a root circle diameter of φ18. The four driven gears 3-1 are evenly distributed circumferentially at equal angles. The four driven gears 3-1 are arranged inside the driving gear 3-6 and are all meshed with the driving gear 3-6.

[0039] The heating mechanism 3 is provided with 4 copper sheets 3-2 of the same size. The copper sheets 3-2 are horn-shaped as a whole, with the bottom connected to the driven gear (3-1) and the tip extending into the driving gear 3-6. Its inner arc diameter is φ12, the outer arc diameter is φ14, and the thickness is 0.3cm. The copper sheet 3-2 has good thermal conductivity and ductility. The inner arc of the copper sheet 3-2 is responsible for clamping and heating the transparent hose. The 4 copper sheets 3-2 are installed at equal angles on the fixed plate 3-11 and fastened with screws. Each copper sheet 3-2 is fastened to the driven gear 3-1 at the corresponding position through a copper column and a screw, so that when the driven gear 3-1 rotates, it can drive the copper sheet 3-2 to rotate in the same direction.

[0040] The heater storage box 3-4 is arranged below the fixed plate 3-11, and the heater storage box 3-4 and the fixed plate 3-11 are connected by a bridge frame 3-5, and the heater storage box 3-4 and the fixed plate 3-11 have a certain interval in the height direction. The heater storage box 3-4 is used to place the heater, and the heater needs to be powered by a 12V power supply. The voltage input interface 3-3 is used to connect the positive and negative poles of the external power supply, and then connect to the positive and negative taps of the heater (the taps are the connection contacts). The bridge frame 3-5 is used to fix the heater storage box 3-4 to the bottom of the fixed plate 3-11, and is also used to receive the heat transfer cable routing output by the heater.

[0041] The static handle 3-7 is fixedly connected or integrally formed with the fixed plate 3-11. During the movement of the heating mechanism 3, the static handle 3-7 remains immobile. The rotating ring 3-10 is wrapped around the periphery of the driving gear 3-6 and can drive the driving gear 3-6 to rotate. The movable handle 3-9 is fixedly connected or integrally formed with the rotating ring 3-10, and a compression spring 3-8 is provided between the movable handle 3-9 and the static handle 3-7.

[0042] Figure 6 The figure shows the initial state of the adaptive diameter-changing clamp. The compression spring 3-8 pushes the movable handle 3-9 to rotate counterclockwise, so that the driving gear 3-6 drives the driven gear 3-1 to rotate. Each rotation of the driven gear 3-1 will in turn rotate the linked copper sheet 3-2 counterclockwise, thereby gradually reducing the diameter of the hollow area to a minimum of φ6. When the copper sheet 3-2 is attached to the surface of the transparent hose (the transparent hose is placed vertically through the hollow area), it will stop rotating, realizing the diameter-changing and adaptive adjustment functions.

[0043] As an implementable manner, the angle between the movable handle 3-9 and the static handle 3-7 forms an acute angle.

[0044] like Figure 7As shown, the heater includes a 0.3μF capacitor 3-12, a positive tap 3-13, a copper wire 3-14, a relay 3-15, a negative tap 3-16, and an IGBT component 3-17 (insulated gate bipolar transistor). The heater is located in an adaptive variable diameter clamp, that is, the heater is set in a heater storage box 3-4. The heater adopts a capacitive heating method. Three 0.3μF capacitors 3-12 are connected in parallel, and the collectors of two IGBT components 3-17 are connected to both ends of the capacitor (0.3μF capacitor 3-12). The gates of the two IGBT components 3-17 are connected, and the emitter is connected to the negative tap 3-15. The other end of the 0.3μF capacitor 3-12 is connected to the copper wire 3-14, which is externally connected to the positive tap 3-13. After the copper wire generates heat, it directly transfers heat to the copper sheet through the heat transfer cable. The voltage input interface 3-3 is connected to a 12V battery, the positive pole of the battery is connected to the positive tap 3-13, and the negative pole of the power supply is connected to the negative tap 3-16. Relay 3-15 receives the PWM signal output from controller 1. After the signal is boosted to 5V, it can control the on and off of relay 3-15, thereby controlling the start and stop of the heater and the temperature increment of the transparent hose.

[0045] In the process of adaptive diameter change, it is equivalent to shrinking from a large circle to an irregularly shaped small circle. As long as the error caused by the irregularity is controlled within 20%, that is, the heating area of ​​the transparent hose is more than 80%, it can ensure that the heating is basically uniform and no hot spots will be generated. The adaptive diameter change clamp is initially φ12, so the present invention is suitable for transparent hoses of φ6 to φ12.

[0046] After the device completes wiring and clamps the transparent hose, the transparent hose temperature control logic is as follows Figure 2 As shown. Power is supplied to the controller 1, and the surface temperature of the transparent hose is collected. The temperature value is updated in real time in the TFTLED LCD screen 1-1. According to the set heating temperature range, when the temperature of the transparent hose is lower than the upper limit of the heating temperature range, the heater will be started for heating, and LED1-5 will light up; when the temperature is heated to the upper limit of the temperature range, the heating will stop, and LED1-5 will go out. During the cooling period, if the temperature of the transparent hose is lower than the lower limit of the heating temperature range, the heating will continue to start until it reaches the upper limit of the temperature range. The details are as follows:

[0047] (1) Start heating, preset 50% PWM duty cycle;

[0048] (2) Collecting the temperature of the heated copper sheet;

[0049] (3) Detect whether a key is pressed, if so, proceed to step (4), if not, proceed to step (5);

[0050] (4) Determine whether KEY1 is pressed. If so, proceed to step (6); if not, proceed to step (7);

[0051] (5) Calculate the temperature increment of the transparent hose surface per second and proceed to step (8);

[0052] (6) The heating temperature interval is reduced by 5°C and the process returns to step (1);

[0053] (7) The heating temperature interval is increased by 5°C and the process returns to step (1);

[0054] (8) Determine whether the increment is greater than 5°C. If so, reduce the PWM duty cycle by 10%. If not, return to step (1).

[0055] Heater status control logic such as Figure 3 As shown. In the heating state, the temperature of the copper sheet is collected in real time to ensure that the temperature is controllable, and the temperature value is updated in real time on the TFTLED LCD screen 1-1. Maintenance personnel can adjust the heating temperature range (the default is 70-75°C). When the KEY1 key is pressed, the upper and lower limits of the heating temperature range are reduced by 5°C respectively. When the KEY2 key is pressed, the upper and lower limits of the heating temperature range are increased by 5°C respectively. If there is no key input, the initial setting is maintained, and the interval value is updated in real time on the TFTLED LCD screen 1-1. The preset PWM duty cycle is 50%, that is, in a heating cycle, the heating time accounts for 50%. Calculate the increment of the surface temperature of the transparent hose, that is, the temperature increase value within one second. If it exceeds 5°C, reduce the duty cycle by 10% to ensure that the temperature of the transparent hose is controllable and prevent hot spot conditions, which reflects the self-feedback function of the device. The details are as follows:

[0056] (1) The controller is powered on and working;

[0057] (2) Collecting the surface temperature of the transparent hose;

[0058] (3) determining whether the temperature of the transparent hose is lower than the upper limit of the heating temperature range, if so, proceeding to step (7), if not, proceeding to step (4);

[0059] (4) determining whether the temperature of the transparent hose exceeds the upper limit of the heating temperature range, if so, proceeding to step (5), if not, proceeding to step (7);

[0060] (5) Stop heating and the LED turns off;

[0061] (6) determining whether the temperature of the transparent hose is lower than the upper limit of the heating temperature range, if so, proceeding to step (7), if not, returning to step (5);

[0062] (7) Start heating and the LED lights up.

[0063] The workflow of the present invention is as follows:

[0064] The maintenance personnel holds the heating mechanism 3 and squeezes the static handle 3-7 and the dynamic handle 3-9 to compress the compression spring 3-8 to the maximum extent. At this time, the clamping diameter of the adaptive variable diameter clamp is in the maximum state, such as Figure 4 As shown, one end of the transparent hose to be assembled is then inserted into the adaptive reducer clamp.

[0065] When the movable handle 3-9 is released, the compression spring 3-8 gradually stretches, and the elastic force causes the movable handle 3-9 to rotate counterclockwise, thereby driving the driving gear 3-6 and the driven gear 3-1 to rotate counterclockwise. Under the action of the linkage mechanism (the driving gear drives the driven gear to rotate), all the copper sheets 3-2 also rotate counterclockwise, so that the clamping diameter is adaptively reduced until the inner wall of the copper sheet 3-2 clamps the transparent hose. After confirming that it is firmly clamped, the maintenance personnel connect the 12V power connector to the voltage input interface 3-3, and the heater begins to produce heat energy, which is transferred to the copper sheet 3-2 through the heat transfer cable, and then the heat is transferred to the surface of the transparent hose, thereby realizing the heating function of the transparent hose.

[0066] During the heating process, the controller 1 follows the control logic to heat the transparent hose to a specified temperature range, and controls the heater on and off according to the temperature increment per unit time to limit the power. After the heating is completed, the 12V power interface can be unplugged.

[0067] In summary, the present invention designs a heating mechanism with self-feedback temperature control function, adaptive diameter change, and a human-computer interaction interface. The self-feedback temperature control function is reflected in the fact that the controller collects the surface temperature of the heating copper sheet and the transparent hose in real time, and updates the display in real time in the human-computer interaction interface. The heating process uses a PWM signal to control the start and stop of the heater, and the initial setting is 50% PWM. The controller calculates the unit time increment of the surface temperature of the transparent hose. When the increment exceeds 5°C, the PWM duty cycle will be reduced to ensure that the temperature is controllable and the transparent hose will not generate hot spots. Human-computer interaction also includes maintenance personnel inputting keys to adjust the heating temperature range to ensure that temperature control is achieved at the manual level and protect the transparent hose from damage. The present invention uses capacitors, IGBTs and copper wires to build a heating circuit, which has the characteristics of controllable power, strong thermal conductivity and good ductility. The adaptive variable diameter clamp adopts 4 horn-shaped copper sheets, which greatly improves the heat dissipation area and avoids heat accumulation. Under the continuous mechanism of spring, movable handle, rotating ring, driving gear and driven gear, the heating copper sheet can gradually rotate counterclockwise to achieve the variable diameter effect. It is suitable for transparent hoses of φ6 to φ12.

[0068] The present invention has a very rigorous and complete control logic, which is divided into transparent hose temperature control logic and heater state control logic (such as Figure 2 and Figure 3As shown). In the temperature control logic of the transparent hose, the surface temperature of the transparent hose is collected in real time. According to the heating temperature range, when the temperature of the transparent hose is lower than the upper limit of the temperature range, the heater is started and the LED lights up; when the temperature is heated to the upper limit of the temperature range, the heating is stopped and the LED goes out; during the cooling period, if the temperature of the transparent hose is lower than the lower limit of the heating temperature range, the heating is continued until it reaches the upper limit of the temperature range, so as to ensure that the temperature of the transparent hose remains in the normal temperature range and avoid hot spots causing damage. In the heater state control logic, the copper sheet temperature is collected in real time to ensure controllability; the default setting of the heating temperature range is 70-75°C, and the maintenance personnel can manually control the temperature range. The preset PWM duty cycle is 50% to ensure that the temperature increases slowly and controllably at the beginning. The increment of the surface temperature of the transparent hose is calculated. If it exceeds 5°C, the duty cycle is reduced by 10% to ensure that the temperature of the transparent hose is controllable and prevent hot spots from causing damage.

[0069] The temperature control logic of the transparent hose provided by the present invention is also applicable to other cylindrical heating objects, ensuring that their temperature is stable within the normal range. The adaptive variable diameter clamp proposed by the present invention can ensure thermal conductivity and heat dissipation on the basis of ensuring a high heat receiving rate, and its adaptive variable diameter function is stable and reliable, does not require manual intervention, and has strong generalization ability. The present invention provides convenience for maintenance personnel, and the present invention has strong safety, simple operation, and easy maintenance.

[0070] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A transparent hose heating device with self-feedback temperature control and adaptive diameter change in a nuclear power plant, characterized in that: The invention comprises an electrically connected controller (1) and a heating mechanism (3), wherein the heating mechanism (3) has a fixed plate (3-11), the fixed plate (3-11) is connected to a static handle (3-7), a driving gear (3-6) and a group of driven gears (3-1) are mounted on the fixed plate (3-11), the driving gear (3-6) is an internal meshing gear, a group of driven gears (3-1) are external meshing gears and mesh with the driving gear (3-6), each driven gear (3-1) is connected to a copper sheet (3-2) to rotate in the same direction, a heater heats the copper sheet (3-2), a rotating ring (3-10) is arranged outside the driving gear (3-6), a moving handle (3-9) is connected to the rotating ring (3-10), and a compression spring (3-8) is arranged between the moving handle (3-9) and the static handle (3-7).

2. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: The heating mechanism (3) has a heater storage box (3-4), and the heater is arranged in the heater storage box (3-4).

3. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 2, characterized in that: The heater storage box (3-4) is provided with a voltage input interface (3-3) for connecting the positive and negative electrodes of an external power source and then connecting to the positive and negative electrode taps of the heater.

4. The transparent hose heating device with self-feedback temperature control and adaptive diameter change in a nuclear power plant according to claim 2 or 3, characterized in that: The heater storage box (3-4) is connected to the fixing plate (3-11) via a bridge frame (3-5).

5. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: The number of the driven gears (3-1) in a group is 4, and they are evenly distributed in the circumferential direction at equal angles.

6. The transparent hose heating device with self-feedback temperature control and adaptive diameter change in a nuclear power plant according to claim 1 or 5, characterized in that: The copper sheet (3-2) is in the shape of an ox horn, and its bottom is connected to the driven gear (3-1). The inner arc of the copper sheet (3-2) clamps and heats the transparent hose.

7. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: Each copper sheet (3-2) is respectively connected and fastened to the driven gear (3-1) at a corresponding position via a copper column and a screw, so that when the driven gear (3-1) rotates, the copper sheet (3-2) is driven to rotate in the same direction.

8. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: The controller (1) comprises an electrically connected TFTLCD liquid crystal screen (1-1), a power supply interface (1-2), an STM32 chip (1-3), a button (1-4), an LED (1-5), a heater temperature collection interface (1-6), a transparent hose temperature collection interface (1-7), and a GPIO interface (1-8).

9. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: The heater comprises a 0.3 μF capacitor (3-12), a positive electrode tap (3-13), a copper wire (3-14), a relay (3-15), a negative electrode tap (3-16), and an IGBT component (3-17). The three 0.3 μF capacitors (3-12) are connected in parallel, the collectors of the two IGBT components (3-17) are connected to both ends of the capacitor, the gates of the two IGBT components (3-17) are connected, and the emitters are connected to the negative electrode tap (3-15).

10. The transparent hose heating device with self-feedback temperature control and adaptive diameter change for a nuclear power plant according to claim 1, characterized in that: The angle between the movable handle (3-9) and the static handle (3-7) forms an acute angle.

Images