Temperature cycle test tool of heat tracing device

Abstract

The invention relates to the technical field of heat tracing device circulation tests, and discloses a heat tracing device temperature circulation test tool which comprises a test box, a heating pressing plate and a cooling pressing plate, a bearing plate is arranged at the bottom end in the test box, a plurality of round rods are arranged on the upper surface of the bearing plate, and mounting vertical plates are symmetrically arranged at the two ends of the upper surface of the bearing plate; wherein one ends of the four round rods are provided with cross-shaped rotating shafts, one ends of the cross-shaped rotating shafts are provided with transmission shafts, one ends of the transmission shafts are provided with first chain wheels, one side of the mounting vertical plate is rotatably provided with a first rotating shaft, the outer surfaces of the first rotating shaft and the multiple transmission shafts are sleeved with second chain wheels, and the outer surface of the first rotating shaft is provided with a driving gear; the cyclic test tool can synchronously simulate various actual installation working conditions of the heat tracing device, and the stability of the output power of the heat tracing device is verified through a magnetic force self-adaptive pressing conductive structure and the overturning and winding design of differential transmission, so that the heat safety is verified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat tracer cycle test, in particular to a temperature cycle test tool for heat tracer. BACKGROUND

[0002] A heat tracer is a heat engineering equipment that provides precise heat compensation for components such as pipelines, equipment and vessels through active heating. Its core function is to achieve stable maintenance of the medium temperature of the heated object, prevention of freezing and condensation, compensation of heat loss, or meet the temperature regulation requirements of specific processes through controllable heat transfer. In special scenarios such as explosive environments, the maximum sheath temperature of the heat tracer body must be strictly lower than the environmental ignition temperature, and the long-term stability of the output power is the core indicator of heat safety verification, so it is crucial to carry out temperature cycle tests for heat tracers that are close to actual working conditions.

[0003] Most existing test tools only use fixed installation methods (such as flat attachment) for testing, and can only simulate a single flat working condition, without considering the diversified installation forms of heat tracers in actual applications. However, in actual engineering, heat tracers are often installed in different ways such as long strip flat, spiral winding and tight winding according to the structural characteristics of the heated body (such as pipelines and equipment bodies). Under different installation forms, the contact area, heat conduction path and heat dissipation efficiency of the heat tracer and the heated body differ significantly. These differences directly affect the output power stability of the heat tracer, but the existing tool cannot simultaneously simulate the above multiple working conditions and compare and analyze the power variation law, resulting in a disconnection between the test results and the actual application scenarios.

[0004] Therefore, the applicant proposes a temperature cycle test tool for heat tracers to achieve a test tool under multiple working conditions through innovative design, so that the test results are more consistent with actual application scenarios, and thus provide scientific and reliable data support for performance verification, safety evaluation and installation process optimization of heat tracers. SUMMARY

[0005] The purpose of the present application is to provide a temperature cycle test tool for heat tracers, which solves the following technical problems: most existing test tools only use fixed installation methods (such as flat attachment) for testing, and can only simulate a single flat working condition, without considering the diversified installation forms of heat tracers in actual applications.

[0006] The purpose of the present application can be achieved by the following technical solutions: A temperature cycle test tool for heat tracers, comprising a test box, a heating press plate and a cooling press plate are slidably installed on the inner top of the test box, a turnover assembly that can move up and down and left and right is arranged at the bottom of the test box, the turnover assembly comprises a bearing plate, a plurality of round rods are arranged on the upper surface of the bearing plate, and a heat tracer body is arranged on the outer surface of the round rod; The upper surface of the bearing plate is symmetrically provided with mounting vertical plates at both ends, one end of the four round rods is provided with a cross shaft, one end of the cross shaft is coaxially fixedly provided with a transmission shaft, the transmission shaft extends to the outside of the mounting vertical plate and is sleeved with a first sprocket; A first rotating shaft is rotatably arranged on one side of the mounting vertical plate, the outer surfaces of the first rotating shaft and the four transmission shafts on the right side are sleeved with second sprockets, the same first chain is sleeved between adjacent second sprockets, the outer surface of the first rotating shaft is provided with a driving gear, and the end of the transmission shaft on one side of the first rotating shaft is provided with a driven gear meshing with the driving gear. The bearing plate is provided with a winding assembly, the winding assembly comprises a plurality of mounting plates slidingly arranged on the upper surface of the bearing plate, and two mounting plates are symmetrically provided with winding rings.

[0007] As a further scheme of the present application, a plurality of conductive mounting grooves are equidistantly formed on one side of the mounting vertical plate, and annular magnets are rotatably arranged in the conductive mounting grooves. One side of the annular magnet is provided with an annular conductive sheet, an annular wall on the inner side of the annular conductive sheet is coaxially rotatably provided with a rotating conductive plate, one side of the rotating conductive plate is symmetrically provided with a first conductive column, one side of the conductive mounting groove is slidingly provided with an annular magnetite, and one side of the annular magnetite is symmetrically provided with a second conductive column. The upper end of the annular conductive sheet is provided with a conductive lead-out block, the upper end of the conductive lead-out block extends to the upper end of the mounting vertical plate and is provided with a conductive plug.

[0008] As a further scheme of the present application, a conductive socket is formed on one side of the first conductive column. One end of the second conductive column extends to the other end of the annular magnetite and is provided with a conductive connector matched with the conductive socket.

[0009] As a further scheme of the present application, a plurality of sliding grooves are formed in the upper surface of the bearing plate, rotating lead screws are rotatably connected in the sliding grooves, sliding blocks are threadedly connected to the outer surfaces of the rotating lead screws, and the upper ends of the sliding blocks are connected to the lower ends of the mounting plates.

[0010] As a further scheme of the present application, one end of each of the rotating lead screws is provided with a first rotating shaft, the outer surfaces of two first rotating shafts are sleeved with first winding sprockets, and the two first winding sprockets are driven by a first winding chain. A second rotating shaft is rotatably arranged between the two first rotating shafts, the outer surfaces of the middle first rotating shaft and the second rotating shaft are sleeved with second winding sprockets, and the two second winding sprockets are driven by a second winding chain.

[0011] As a further aspect of the present invention: one end of the second rotating shaft is provided with an active winding gear, and one end of the first rotating shaft on the right side is provided with a partially driven winding gear that meshes with the active winding gear.

[0012] As a further embodiment of the present invention: a semicircular plate is symmetrically slidably arranged on one of the mounting plates, and a first damping spring is symmetrically arranged at the lower end of the semicircular plate; the lower ends of the two first damping springs are connected to the same pressing plate. The other two mounting plates are symmetrically provided with winding rings, and second damping springs are symmetrically provided in the grooves on the inner sidewalls of the winding rings. A compression plate is provided on one side of the second damping spring.

[0013] As a further aspect of the present invention: a starting collar is provided on one side of the round rod, and both the starting collar and the winding ring are horizontally arranged.

[0014] As a further aspect of the present invention: a conveying component is provided at the inner bottom of the test chamber; The conveying assembly includes conveying plates symmetrically arranged at the bottom of the test chamber, and a first conveying shaft and a second conveying shaft are symmetrically rotatably arranged between the two conveying plates. The outer surface of the first transmission shaft is symmetrically provided with a first transmission wheel, and the outer surface of the second transmission shaft is symmetrically provided with a second transmission wheel. The first transmission wheel and the second transmission wheel are driven by a transmission chain. The upper ends of the two transmission chains are fixedly provided with a movable slide plate, and the upper end of the movable slide plate is provided with a lifting adjustment component.

[0015] As a further aspect of the present invention: the lifting and adjusting assembly includes an electric telescopic rod disposed on the upper end of the movable sliding plate, the upper end of the electric telescopic rod being provided with a T-shaped support plate, and the upper end of the T-shaped support plate being connected to the lower end of the bearing plate.

[0016] The beneficial effects of this invention are: (1) The cyclic test fixture of the present invention can simultaneously simulate the output power characteristics of the heat tracing device under multiple working conditions. Through the cooperation of multiple round rods and winding components, the synchronous test of three actual installation forms of the heat tracing device, namely, long strip flat laying, spiral winding and tight winding, is realized. Combined with the differential transmission design, it ensures that the heat tracing device and the cold and hot pressure plate are evenly attached under different installation methods. It solves the problem of the disconnect between the single working condition test of the existing fixture and the actual application, and provides data support that fits the real scenario for the output power stability analysis. (2) The present invention adopts a magnetic force adaptive clamping structure of ring magnet and magnet to achieve tight contact between conductive connector and socket, automatically compensate for assembly error and wear, and ensures stable conductivity when the heat tracing device rotates with the rotating conductive plate; integrates data recording, voltage regulation and other modules to form a closed-loop control system to ensure accurate acquisition of power, temperature and other parameters in the cold and hot cycle, and provide a reliable basis for thermal safety verification.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the test chamber of the present invention; Figure 3 This is a schematic diagram of the structure of the first part of the flipping component of the present invention; Figure 4 This is a schematic diagram of the structure of the second part of the flipping component of the present invention; Figure 5 This is a structural schematic diagram of the third part of the flipping component of the present invention; Figure 6 This is a schematic diagram of the structure of the upper surface component of the bearing plate of the present invention; Figure 7 This is a schematic diagram of the structure of the first part of the winding assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the second part of the winding assembly of the present invention; Figure 9 This is a schematic diagram of the structure of the winding assembly of the present invention for actively winding gears and other components; Figure 10 This is a schematic diagram of the structure of the conveying component and the lifting adjustment component of the present invention.

[0020] In the diagram: 100, Test chamber; 200, Heating plate; 300, Cooling plate; 400, Conveying assembly; 401, Conveying plate; 402, First conveying shaft; 403, Second conveying shaft; 404, First conveying wheel; 405, Second conveying wheel; 406, Conveying chain; 407, Conveying motor; 408, Moving slide plate; 500, Lifting and adjusting assembly; 501, Electric telescopic rod; 502, T-shaped support plate; 600. Tilting assembly; 601. Support plate; 602. Round rod; 603. Heat tracing unit body; 604. Mounting plate; 605. Conductive mounting groove; 606. Ring magnet; 607. Insulating pad; 608. Ring conductive sheet; 609. Rotating conductive plate; 610. Conductive lead block; 611. First conductive post; 612. Conductive socket; 613. Ring magnet; 614. Second conductive post; 615. Conductive connector; 616. Core clamping screw; 617. Cross groove; 618. Cross shaft; 619. Drive shaft; 620. First rotating shaft; 621. Second sprocket; 622. Second chain; 623. First sprocket; 624. First chain; 625. Drive gear; 626. Driven gear; 627. Rotating motor; 700. Winding assembly; 701. Sliding groove; 702. Rotating lead screw; 703. Sliding block; 704. First rotating shaft; 705. First winding sprocket; 706. First winding chain; 707. Second rotating shaft; 708. Second winding sprocket; 709. Second winding chain; 710. Driving winding gear; 711. Partially driven winding gear; 712. Winding motor; 713. Mounting plate; 714. Semicircular plate; 715. First damping spring; 716. Pressing plate; 717. Starting collar; 718. Winding ring; 719. Second damping spring; 720. Extrusion plate. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] In the field of heat tracing test cycle technology, most existing test fixtures only use fixed installation methods (such as flat plate bonding) for testing, which can only simulate a single flat laying condition and do not consider the diverse installation forms in actual heat tracing applications; although some fixtures can achieve temperature cycling function, their core design goals focus on improving test efficiency or strengthening structural durability, and fail to include different installation forms as key variables in the power influencing factor analysis.

[0024] However, in practical engineering, heat tracing devices are often installed in different ways, such as long strip laying, spiral winding, and tight winding, depending on the structural characteristics of the heated body (such as pipes or equipment). Under different installation configurations, the contact area between the heat tracing device and the heated body, the heat conduction path, and the heat dissipation efficiency vary significantly. These differences directly affect the stability of the heat tracing device's output power. However, existing fixtures cannot simultaneously simulate these multiple operating conditions and compare and analyze the power change patterns, leading to a disconnect between test results and actual application scenarios. Therefore, the applicant proposes a temperature cycling test fixture for heat tracing devices. This innovative design aims to provide a test fixture for multi-condition installation, making the test results more closely aligned with actual application scenarios. This, in turn, provides scientific and reliable data support for the performance verification, safety assessment, and installation process optimization of heat tracing devices.

[0025] Example 1: Please refer to Figure 1 , Figure 2 As shown, a temperature cycling test fixture for a heat tracing device includes a test chamber 100 and a heat tracing device body 603. A heating plate 200 and a cooling plate 300 are slidably mounted on the inner top of the test chamber 100. The heating plate 200 and cooling plate 300 can be driven by a servo motor-lead screw and slider combination. A lead screw is rotatably mounted on the inner top of the test chamber 100, with one end connected to a motor. Two sliders are threaded onto the outer surface of the lead screw, and the lower ends of the two sliders are respectively connected to the heating plate... The upper ends of the heating plate 200 and the cooling plate 300 are connected. The bottom of the test chamber 100 is provided with a conveying assembly 400. The conveying assembly 400 is provided with two lifting adjustment assemblies 500. The upper ends of the two lifting adjustment assemblies 500 are provided with a flipping assembly 600. The lower ends of the heating plate 200 and the cooling plate 300 are provided with multiple U-shaped grooves at equal intervals. The U-shaped grooves are adapted to the size of the round rod 602, so that the round rod 602, whether laid flat or wrapped with heat tracing, can be fitted to achieve uniform heating. In explosive atmospheres, it is critical that the maximum sheath temperature of the heat tracing unit 603 be lower than the ignition temperature of the explosive atmosphere. After completing the maximum exposure test, the output power of the heat tracing unit should be measured using the same method and platen temperature used during the initial measurement. This test demonstrates thermal safety by verifying the stability of the output power of the parallel heat tracing unit 603 products over time. The temperature of the cold-heated platen 200 should be uniformly controlled at the specified low test temperature. If the platen temperature is below 100°C, the maximum tolerance is ±5°C; if it is above 100°C, the maximum tolerance is 5% of the maximum continuous operating temperature.

[0026] Please see Figure 2 , Figure 3 As shown, the flipping assembly 600 includes a support plate 601 mounted on the lifting and adjusting assembly 500. Multiple round rods 602 are evenly spaced on the upper surface of the support plate 601. A heat tracing body 603 is mounted on the outer surface of the round rods 602. The heat tracing body 603 is installed in three different ways: the first group (two round rods 602) is laid flat in a long strip; the second group (two round rods 602) is wound in a spiral shape; and the third group (two round rods 602) is wound tightly. These three different installation methods are used to simulate the significant differences in the contact area, heat conduction path, and heat dissipation efficiency between the heat tracing body 603 and the heated body.

[0027] For further details, please refer to Figure 3 , Figure 4 , Figure 6 As shown, mounting plates 604 are symmetrically arranged at both ends of the upper surface of the support plate 601. Multiple conductive mounting grooves 605 are evenly spaced on one side of each mounting plate 604, corresponding one-to-one with multiple round rods 602. A ring magnet 606 is rotatably mounted inside each conductive mounting groove 605. An insulating pad 607 is mounted on one side of the ring magnet 606, and a ring conductive sheet 608 is mounted on one side of the insulating pad 607. A rotating conductive plate 609 is coaxially rotatably mounted on the inner annular wall of the ring conductive sheet 608. A conductive lead-out block 610 is mounted at the upper end of the ring conductive sheet 608. The upper end of 610 extends to the upper end of the mounting plate 604 and is provided with a conductive plug. A first conductive post 611 is symmetrically arranged on one side of the rotating conductive plate 609. A conductive socket 612 is opened on one side of the first conductive post 611. An annular magnet 613 is slidably arranged on one side of the conductive mounting groove 605. A second conductive post 614 is symmetrically arranged on one side of the annular magnet 613. One end of the second conductive post 614 extends to the other end of the annular magnet 613 and a conductive connector 615 adapted to the conductive socket 612 is provided at its end. A wire core clamping screw 616 is provided at the other end of the second conductive post 614. Peel off the insulation layer at one end of the heat tracing unit body 603 and place it into the reserved groove of the second conductive post 614 of the tooling. Attach the clamping part (such as a U-shaped copper clamping block) above the wire core, align it with the threaded hole of the second conductive post 614, and tighten the wire core clamping screw 616 to push the clamping part to press the wire core tightly onto the support surface of the conductive carrier. In subsequent design, the heat tracing device 603 body needs to rotate so that the heating plate 200 and cooling plate 300 can uniformly heat or cool the outer surface of the heat tracing device body 603. The annular magnet 606 magnetically attracts the annular magnet 613 to slide along the conductive mounting groove 605, so that the conductive connector 615 is inserted into the conductive socket 612 to form a tight conductive contact. After the external wire is fixed by the wire core clamping screw 616, the current is input sequentially through the conductive plug, conductive lead-out block 610, annular conductive sheet 608, rotating conductive plate 609, first conductive post 611 and second conductive post 614, and conductive connector 615. The insulating pad 607 prevents the annular magnet 606 from short-circuiting with the annular conductive sheet 608. When the round rod 602 drives the heat tracing body 603 to rotate, the rotating conductive plate 609 can rotate coaxially with the annular conductive sheet 608. The magnetic attraction ensures stable conductive contact during rotation. The design advantages of the annular magnet 606 and the annular magnet 613 are that they can achieve adaptive clamping of the conductive connector 615 and the conductive socket 612 through continuous and uniform magnetic force, reduce contact resistance and avoid poor contact caused by vibration and wear. They can also automatically compensate for assembly errors and wear after long-term use, without the need for an additional mechanical clamping mechanism, simplifying the structure, improving assembly efficiency, and taking into account both conductive reliability and operational stability.

[0028] Furthermore, this plan includes multiple sets of control tests. The heat tracing devices are part of a heat tracing device product series, sharing common materials (materials with the same performance level) and different rated voltages and output power. During the test, three samples from each of the following items will be selected (a total of six samples): a) Minimum rated voltage level and maximum rated output power; b) Maximum rated voltage and minimum rated output power.

[0029] Before starting the test, the heat tracing unit should be operated at the highest rated voltage for 150°C at the highest continuous operating temperature declared by the manufacturer. The sample should be powered at the highest rated voltage. The temperature of the pressure plate should be (23 ± 5) °C. The initial output power of the sample should be determined by measuring the voltage and current after the clamps have reached equilibrium.

[0030] For further details, please refer to Figure 7 As shown, a cross groove 617 is provided in the middle of the annular magnet 613, the annular magnet 606 and the rotating conductive plate 609. A cross rotating shaft 618 is slidably sleeved inside the cross groove 617. A transmission shaft 619 is coaxially fixed at the end of the cross rotating shaft 618 away from the round rod 602. One end of each of the four cross-shaped rotating shafts 618 on the left is connected to a round rod 602. The cross-shaped rotating shafts 618 drive the round rod 602 to rotate, so that the round rod 602, which is wrapped around the heat tracing body 603, rotates intermittently during heating and cooling. The first set of long strip-shaped heat tracing body 603 does not need the round rod 602 to drive its rotation, so the round rod 602 does not need to be connected to the cross-shaped rotating shafts 618 to achieve its rotation.

[0031] There are six drive shafts 619 in total, with two shafts forming a group, corresponding to three sets of installation units: the first group (the two rightmost drive shafts 619) is adapted to the long, flat installation of the heat tracing unit body 603; the second group (the two middle drive shafts 619) is adapted to the spirally wound installation of the heat tracing unit body 603; and the third group (the two rightmost drive shafts 619) is adapted to the tightly wound installation of the heat tracing unit body 603. The two drive shafts 619 in each group correspond to two actuating ends under the same installation method (such as one end of the two rotating rods 602).

[0032] Please see Figure 5 As shown, a first rotating shaft 620 is rotatably mounted on the mounting plate 604 via bearings. The first rotating shaft 620 is located in the arrangement gap between the second group of transmission shafts 619 and the third group of transmission shafts 619. The outer surfaces of the two transmission shafts 619 of the first group, the two transmission shafts 619 of the second group, and the first rotating shaft 620 are all coaxially fixedly sleeved with second sprockets 621 by key connection. The same second chain 622 is sleeved between adjacent second sprockets 621 (to realize synchronous transmission between the first group, the second group of transmission shafts 619 and the first rotating shaft 620).

[0033] Each drive shaft 619 has one end away from the cross shaft 618 that passes through the mounting plate 604 and extends to its outer side. The first sprocket 623 is fixedly sleeved at this end by a tight fit. The first sprockets 623 on the drive shafts 619 in adjacent groups are fitted with the same first chain 624.

[0034] The outer surface of the first rotating shaft 620 is coaxially fixed with a drive gear 625 via a key connection to the outer side of the second sprocket 621. A driven gear 626 is coaxially fixed to the end of a transmission shaft 619 near the first rotating shaft 620 (on the same side as the drive gear 625). The driven gear 626 meshes with the drive gear 625 for transmission, and the pitch circle diameter of the driven gear 626 is smaller than that of the drive gear 625.

[0035] A rotating motor 627 is installed on one side of the mounting plate 604. The output shaft of the rotating motor 627 is connected to the outermost transmission shaft 619. The two rotating motors 627 are synchronously controlled by a PLC controller to achieve synchronous rotation.

[0036] The rotating motor 627 drives the outermost drive shaft 619 to rotate. Through two sets of power transmission paths, the first set of transmission conditions drives the first and second sets of multiple drive shafts 619 to rotate through the first sprocket 623 and the first chain 624, realizing the synchronous rotation of multiple round rods 602. The second set of transmission conditions enables the third set of corresponding drive shafts 619 to achieve a differential rotation speed higher than the first two sets through the driving gear 625 and driven gear 626 of the first rotating shaft 620, simulating a tightly wound installation method. Finally, the four drive shafts 619 on the left transmit torque through the cross shaft 618 (slidably sleeved with the cross groove 617 of the annular magnet 613, the annular magnet 606, and the rotating conductive plate 609), driving the corresponding round rods 602 to rotate, realizing the winding or flipping action of the heat tracing body 603 under different working conditions.

[0037] The heat tracing body 603 is moved by the winding assembly 700. The two rotating rods 602 in the middle can slowly wind the heat tracing body 603 onto its surface. The two rods 602 on the left rotate faster, which can achieve a denser winding under a constant sliding path. The rotation speed can be adjusted so that the contact surfaces of the heat tracing body 603 on the left, middle and right sides with the heating plate 200 and cooling plate 300 are always consistent at a certain rotation speed (for example, the heat tracing body 603 on the middle and right sides rotates 180 degrees to achieve flipping, and the heat tracing body 603 on the left side rotates 540 degrees to achieve flipping as well).

[0038] Example 2: Based on Example 1, please refer to... Figures 6-9 As shown, a winding assembly 700 is provided on the support plate 601. The winding assembly 700 includes sliding grooves 701 evenly spaced on the upper surface of the support plate 601. The sliding grooves 701 are located in the middle of multiple tooling installation methods. A rotating screw 702 is rotatably connected inside the sliding groove 701. The outer surface of each rotating screw 702 is threaded with a sliding block 703. One end of each of the multiple rotating screws 702 is provided with a first rotating shaft 704. The outer surface of the two first rotating shafts 704 on the left and in the middle is sleeved with a first winding sprocket 705. The two first winding sprockets 705 are connected by a first winding chain 706. The first winding sprocket 705 in the middle is connected by a first winding chain 706. A second rotating shaft 707 is rotatably connected between a rotating shaft 704 and a first rotating shaft 704 on the right. The outer surfaces of the first rotating shaft 704 and the second rotating shaft 707 in the middle are both fitted with second winding sprockets 708. The two second winding sprockets 708 are driven by a second winding chain 709. One end of the second rotating shaft 707 is provided with a driving winding gear 710. One end of the first rotating shaft 704 on the right is provided with a partially driven winding gear 711 that meshes with the driving winding gear 710. One end of the first rotating shaft 704 in the middle is connected to a winding motor 712. A mounting plate 713 is fixedly provided on the upper end of the sliding block 703.

[0039] The first rotating shaft 704 is driven to rotate by the winding motor 712. The first rotating shaft 704 drives the two rotating screws 702 on the left and in the middle to rotate synchronously through the first winding sprocket 705 and the first winding chain 706. The first rotating shaft 704 drives the rightmost second rotating shaft 707 to rotate intermittently through the active winding gear 710 and the partially driven winding gear 711, thereby realizing the intermittent rotation of the rightmost rotating screw 702 to cooperate with the intermittent movement of the sliding block 703.

[0040] When the sliding block 703 is stationary, the round rod 602 rotates, thus achieving tight winding. In the design, the lead of the rotating screw 702 of the three sliding grooves 701 is such that the total displacement of the sliding block 703 is only related to the total number of rotations of the rotating screw 702. Then, the gear / sprocket transmission ratio is adapted to the motion state of different sliding blocks 703. For the leftmost sliding block 703 that slides-stops-slides, the total number of rotations of its rotating screw 702 needs to be compensated for the lack of rotation in the stationary stage by the transmission ratio. That is, the gear / sprocket transmission ratio driving the rotating screw 702 is adapted to the transmission ratio of other rotating screws 702, so that the number of rotations of the left rotating screw 702 in the effective sliding time is consistent with the total number of rotations of the rotating screws 702 of other sliding blocks 703 (continuous sliding or sliding with different intermittent periods). Finally, it is ensured that the total displacement of the three is equal, so that they reach the side of the sliding groove 701 synchronously.

[0041] For further details, please refer to Figure 7 As shown, a semicircular plate 714 is symmetrically slidably arranged on the outermost mounting plate 713. The semicircular plate 714 is slidably arranged inside the mounting plate 713 via a telescopic rod. A first damping spring 715 is symmetrically arranged at the lower end of the semicircular plate 714. The lower ends of the two first damping springs 715 are connected to the same pressing plate 716. When installed in a long, flat strip, the heat tracing unit 603 rests on the surface of the round rod 602. The telescopic rod moves the semi-circular plate 714 downwards, and the first damping spring 715 drives the pressing plate 716 to press against the upper surface of the heat tracing unit 603, smoothing it out as it flips. The telescopic rod is used to adjust the height of the semi-circular plate 714 to avoid motion interference.

[0042] For further details, please refer to Figure 6 , Figure 8 As shown, a starting collar 717 is provided on one side of the round rod 602, and winding rings 718 are symmetrically provided on the middle and rightmost mounting plates 713. Both the starting collar 717 and the winding rings 718 are horizontally arranged, so that the flat heat tracing body 603 can fit tightly against the surface of the round rod 602. A second damping spring 719 is symmetrically provided in the groove on the inner side wall of the winding ring 718, and a pressing plate 720 is provided on one side of the second damping spring 719. One end of the heat tracing body 603 is wound around two conductive connectors 615, and the other end passes through the starting collar 717 and out of the winding ring 718. The second damping spring 719 drives the extrusion plate 720 to extrude the heat tracing body 603. The elastic force of the second damping spring 719 is designed to be a weak preload force, which can both counteract the slack tendency of the heat tracing body 603 itself and ensure that it forms a uniform and tight spiral winding structure on the surface of the round rod 602, and at the same time not restrict the sliding of the heat tracing body 603 relative to the winding ring 718, so as to achieve continuous winding.

[0043] After the heat tracing body 603 is wound, it is removed from the winding ring 718, and the insulation part at its end is removed. It is then fixed by the conductive connector 615 at the other end and the wire core clamping screw 616. When turning, the wound heat tracing body 603 will not twist or knot because the round rod 602 rotates with it. The flat heat tracing body, since the round rod 602 does not rotate, can be smoothed out by pressing the plate 716.

[0044] Example 3: Based on Examples 1 and 2, please refer to... Figure 10 As shown, the conveying assembly 400 includes conveying plates 401 symmetrically arranged at the bottom of the test chamber 100. A first conveying shaft 402 and a second conveying shaft 403 are symmetrically rotatably arranged between the two conveying plates 401. A first conveying wheel 404 is symmetrically arranged on the outer surface of the first conveying shaft 402, and a second conveying wheel 405 is symmetrically arranged on the outer surface of the second conveying shaft 403. The first conveying wheel 404 and the second conveying wheel 405 are driven by a conveying chain 406 along the length direction of the conveying plate 401. A conveying motor 407 is provided at one end of the first conveying shaft 402 and is connected to the conveying plate 401. A movable slide plate 408 is fixedly arranged at the upper end of the two conveying chains 406, and a lifting adjustment assembly 500 is arranged on the movable slide plate 408.

[0045] The transmission motor 407 drives the first transmission shaft 402 to rotate, which in turn drives the second transmission wheel 405 to rotate via two transmission chains 406. The transmission chains 406 drive the sliding plate 408 to slide, thereby adjusting the position of the flipping component 600. This causes the flipping component 600 to reciprocate between the heating plate 200 and the cooling plate 300, achieving multiple hot and cold cycles for the heat tracing unit 603. The output power of the heat tracing unit 603 is continuously monitored, and the measured value is recorded in the last 300 seconds of the cold cycle, with an interval not exceeding 50 hot cycles.

[0046] For further details, please refer to Figure 1 As shown, the lifting adjustment assembly 500 includes an electric telescopic rod 501 mounted on the movable slide plate 408. A T-shaped support plate 502 is mounted on the upper end of the electric telescopic rod 501, and the upper end of the T-shaped support plate 502 is connected to the lower end of the bearing plate 601.

[0047] The electric telescopic rod 501 drives the T-shaped support plate 502 to move upward, and the T-shaped support plate 502 drives the bearing plate 601 to move upward, so as to fit the lower end of the heating plate 200 and the cooling plate 300, thereby realizing the hot and cold circulation of the heat tracing device body 603.

[0048] This heat tracing device temperature cycling test fixture measures the real-time output power of the heat tracing device body 603 at different temperature nodes in a simulated hot and cold cycling environment. The integrated data recording module continuously collects and stores key parameters such as power, voltage, and temperature. Then, relying on a professional data processing system, it simulates and analyzes the massive amount of data and fits an output power-time relationship curve. This visually presents the fluctuation law and stability characteristics of the product's output power under long-term hot and cold cycling stress, thus providing core data support for verifying its thermal safety. The fixture highly integrates multiple functional modules such as data recording, precise voltage regulation, constant temperature control, and rapid hot and cold switching control, forming a closed-loop test control system to ensure the accuracy and reliability of the test data.

[0049] 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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A temperature cycling test fixture for a heat tracing device, comprising a test chamber, wherein a heating plate and a cooling plate are slidably mounted on the top inner side of the test chamber, characterized in that, The bottom of the test chamber is equipped with a flipping assembly that can move up, down, left, and right. The flipping assembly includes a support plate, and the upper surface of the support plate is provided with multiple round rods. The outer surface of the round rods is provided with the heat tracing body. Mounting plates are symmetrically arranged at both ends of the upper surface of the bearing plate. One end of each of the four round rods is provided with a cross pivot. A drive shaft is coaxially fixed at one end of the cross pivot. The drive shaft extends to the outside of the mounting plate and is sleeved with a first sprocket. A first rotating shaft is rotatably provided on one side of the mounting plate. The outer surfaces of the first rotating shaft and the four transmission shafts on the right are all fitted with second sprockets. The same first chain is fitted between adjacent second sprockets. A driving gear is provided on the outer surface of the first rotating shaft. A driven gear that meshes with the driving gear is provided at the end of the transmission shaft on one side of the first rotating shaft. The carrier plate is provided with a winding assembly, which includes multiple mounting plates slidably disposed on the upper surface of the carrier plate, wherein winding rings are symmetrically disposed on two mounting plates.

2. The temperature cycling test fixture for a heat tracing device according to claim 1, characterized in that, The mounting plate has multiple conductive mounting grooves evenly spaced on one side, and a ring magnet is rotatably installed inside the conductive mounting groove. An annular conductive sheet is provided on one side of the annular magnet. A rotating conductive plate is coaxially rotatably provided on the inner annular wall of the annular conductive sheet. A first conductive post is symmetrically provided on one side of the rotating conductive plate. An annular magnet is slidably provided on one side of the conductive mounting groove. A second conductive post is symmetrically provided on one side of the annular magnet. The upper end of the annular conductive sheet is provided with a conductive lead-out block, and the upper end of the conductive lead-out block extends to the upper end of the mounting plate and is provided with a conductive plug.

3. The temperature cycling test fixture for a heat tracing device according to claim 2, characterized in that, A conductive socket is provided on one side of the first conductive post; One end of the second conductive post extends to the other end of the annular magnet and is provided with a conductive connector adapted to the conductive socket.

4. The temperature cycling test fixture for a heat tracing device according to claim 1, characterized in that, The upper surface of the support plate is provided with multiple sliding grooves, and a rotating screw is rotatably connected in the sliding groove. A sliding block is threadedly connected to the outer surface of the rotating screw, and the upper end of the sliding block is connected to the lower end of the mounting plate.

5. The temperature cycling test fixture for a heat tracing device according to claim 4, characterized in that, One end of each of the plurality of rotating lead screws is provided with a first rotating shaft, wherein the outer surfaces of two of the first rotating shafts are fitted with first winding sprockets, and the two first winding sprockets are driven by a first winding chain; A second rotating shaft is rotatably arranged between the two first rotating shafts. The outer surfaces of both the first rotating shaft and the second rotating shaft in the middle are fitted with second winding sprockets, and the two second winding sprockets are driven by a second winding chain.

6. The temperature cycling test fixture for a heat tracing device according to claim 5, characterized in that, One end of the second rotating shaft is provided with an active winding gear, and one end of the first rotating shaft on the right side is provided with a partially driven winding gear that meshes with the active winding gear.

7. The temperature cycling test fixture for a heat tracing device according to claim 1, characterized in that, A semicircular plate is symmetrically slidably arranged on one of the mounting plates, and a first damping spring is symmetrically arranged at the lower end of the semicircular plate. The lower ends of the two first damping springs are connected to the same pressing plate. The other two mounting plates are symmetrically provided with winding rings, and second damping springs are symmetrically provided in the grooves on the inner sidewalls of the winding rings. A compression plate is provided on one side of the second damping spring.

8. The temperature cycling test fixture for a heat tracing device according to claim 7, characterized in that, A starting collar is provided on one side of the round rod, and both the starting collar and the winding ring are horizontally arranged.

9. The temperature cycling test fixture for a heat tracing device according to claim 1, characterized in that, A conveying assembly is provided at the bottom of the test chamber; The conveying assembly includes conveying plates symmetrically arranged at the bottom of the test chamber, and a first conveying shaft and a second conveying shaft are symmetrically rotatably arranged between the two conveying plates. The outer surface of the first transmission shaft is symmetrically provided with a first transmission wheel, and the outer surface of the second transmission shaft is symmetrically provided with a second transmission wheel. The first transmission wheel and the second transmission wheel are driven by a transmission chain. The upper ends of the two transmission chains are fixedly provided with a movable slide plate, and the upper end of the movable slide plate is provided with a lifting adjustment component.

10. The temperature cycling test fixture for a heat tracing device according to claim 9, characterized in that, The lifting and adjusting assembly includes an electric telescopic rod disposed on the upper end of the movable slide plate, and a T-shaped support plate disposed on the upper end of the electric telescopic rod, the upper end of the T-shaped support plate being connected to the lower end of the bearing plate.

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