Thermal aging test box for cable detection

Abstract

A thermal aging test box for cable detection relates to the technical field of cable detection, is used for performing a thermal aging test on a cable, and comprises a box body, an ultraviolet lamp and an electric heating device, an opening and closing door is arranged on one side of the box body; electric heating devices are arranged on four side walls in the box body; a cylindrical ultraviolet lamp is arranged at the center position in the box body, and a rotating device for driving a cable to rotate in the circumferential direction of the ultraviolet lamp and autorotate is arranged above the ultraviolet lamp in the box body; a motor for driving the rotating device is arranged at the top of the box body; the cable is correspondingly connected with the rotating device through the clamping device; the electric heating devices are arranged on the four side walls in the box body, and it is ensured that the cable can be evenly heated in all directions. The cylindrical ultraviolet lamp arranged at the central position and the circumferential rotation and autorotation mechanism driven by the rotating device ensure that all parts of the surface of the cable can receive the same ultraviolet irradiation, so that a more uniform aging simulation environment is realized.

Description

Technical Field

[0001] The invention relates to the technical field of cable detection, in particular to a thermal aging test box for cable detection. Background Art

[0002] As a key component for power transmission and information transmission, the performance and life of cables are directly affected by environmental factors. In particular, when exposed to harsh conditions such as high temperature and ultraviolet radiation for a long time, the insulation material of the cable will age, resulting in a decrease in electrical performance and even possible safety accidents. Therefore, thermal aging tests on cables to evaluate their stability and durability under extreme conditions have become an indispensable part of cable manufacturing and application.

[0003] Traditional cable thermal aging test equipment mainly relies on static heating, that is, fixing the cable in a closed space and raising the ambient temperature through electric heating elements to simulate the high temperature conditions in nature. However, this simple heating method has several significant problems: Uneven heating: Since the cable is usually placed statically, it is difficult to ensure that the entire cable surface can obtain a consistent temperature distribution by relying on a heat source in a single direction. This may cause some areas to overheat while other parts are not fully heated, thus affecting the authenticity and reliability of the test results. Lack of light simulation: Ultraviolet (UV) irradiation in nature is another important factor that accelerates the aging of cable materials. However, traditional devices often ignore this point and cannot fully reproduce the complex photochemical reaction process in the actual use environment, causing the experimental data to deviate from the actual situation. Inconvenient operation: Many existing devices require cumbersome manual operations when replacing specimens or adjusting settings, which increases the workload and easily introduces human errors.

[0004] A Chinese patent (publication number: CN117191687A) discloses a cable heat aging test box; the patent places the two ends of the cable inside the connecting tubes at both ends respectively, and according to the diameter of the cable, the clamping plate clamps the outer circumference of the cable by adjusting the bolts. It is suitable for cables of different diameters. The rotating mechanism drives the cable to rotate, so that the ultraviolet lamps on the two arc plates can be fully irradiated on the cable. The heating machine heats the cable to improve the uniformity of heating, and the cable is subjected to a heat aging test simulating sunlight exposure. However, the patent has a complex structure and high use and maintenance costs. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a thermal aging test box for cable detection.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A heat aging test box for cable detection is used to perform heat aging tests on cables, comprising a box body, an ultraviolet lamp and an electric heating device; an opening and closing door is provided on one side of the box body; four side walls in the box body are provided with electric heating devices; a cylindrical ultraviolet lamp is provided at the center of the box body, and a rotating device for driving the cable to rotate along the circumference of the ultraviolet lamp and rotate on its own is provided above the ultraviolet lamp in the box body; a motor for driving the rotating device is provided on the top of the box body; and the cable is connected to the rotating device correspondingly through a clamping device.

[0007] Preferably, the rotating device includes an inner gear ring which is fastened to the top of the box body, a planetary carrier which is connected to the motor transmission is provided inside the inner gear ring, a plurality of planetary wheels are rotatably connected to the planetary carrier, and the planetary wheels are meshed with the inner gear ring; a clamping device is coaxially fastened to the bottom of the planetary wheel.

[0008] Preferably, the clamping device comprises a connecting sleeve whose top is coaxially and tightly connected to the planetary gear, and slots are provided on both sides of the bottom of the connecting sleeve, and eccentric clamping claws are hinged in the slots through hinge shafts.

[0009] Preferably, the shaft body of the articulated shaft is sleeved with a torsion spring for causing the eccentric clamping claw to automatically retract into the connecting sleeve.

[0010] Preferably, a counterweight is connected to the bottom of the cable.

[0011] Preferably, a through hole is provided at the center of the counterweight block.

[0012] Preferably, a temperature sensor is provided in the box.

[0013] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The invention discloses a heat aging test box for cable detection, which has a simple structure, a compact and reasonable overall equipment layout, and a low production cost; the four side walls of the box are all equipped with electric heating devices, ensuring that the cable can be evenly heated from all directions. At the same time, the cylindrical ultraviolet lamp arranged at the center and the circumferential rotation and self-rotation mechanism driven by the rotating device ensure that all parts of the cable surface can receive the same ultraviolet light irradiation, thereby realizing a more realistic and uniform aging simulation environment.

[0014] The clamping device of the present invention adopts the design of eccentric clamping claws and torsion springs, which can automatically tighten and maintain a stable clamping force when the cable is inserted, and will not loosen even under the weight of the cable. When the cable needs to be removed, it can be released with a simple operation, which is safe and efficient.

[0015] The present invention designs a counterweight to prevent the cable from bending when it is suspended. The counterweight can not only straighten the cable to keep it in a straight line during the entire aging process, but also further improve the uniformity of heating and ensure the validity and consistency of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the internal structure of the box; Figure 3 is a schematic diagram of the structure of the rotating device; Figure 4 It is a schematic diagram of the structure of the clamping device.

[0017] In the figure: 1. cable; 2. box; 3. ultraviolet lamp; 4. electric heating device; 5. rotating device; 5-1. inner ring gear; 5-2. planetary carrier; 5-3. planetary gear; 6. motor; 7. clamping device; 7-1. connecting sleeve; 7-2. slot; 7-3. hinge shaft; 7-4. eccentric clamping claw; 8. counterweight; 9. opening and closing door. DETAILED DESCRIPTION

[0018] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0019] Embodiment 1, in combination with Figures 1 to 4 A heat aging test box for cable testing is used to perform a heat aging test on a cable 1, comprising a box body 2, an ultraviolet lamp 3 and an electric heating device 4. An opening and closing door 9 is provided on one side of the box body 2, and a user can easily hang a cable 1 to be tested inside the box body 2 by opening or closing the opening and closing door 9, or take out the cable 1 after the aging treatment is completed. This design greatly improves the convenience of replacing the cable.

[0020] In order to achieve a uniform heat aging effect, the four inner walls of the box 2 are all equipped with electric heating devices 4 to apply uniform heat to the cable 1. In addition, the box 2 is equipped with a temperature sensor, which can monitor and feedback the temperature data in the box 2 in real time, thereby achieving precise control of the electric heating device 4 and ensuring the stability and consistency of the temperature environment.

[0021] Located in the center of the box 2 is a cylindrical UV lamp 3, which provides uniform UV irradiation around the cable 1, simulating the cable aging process under natural light conditions. In order to ensure that the cable 1 is evenly exposed to UV light during the UV irradiation process, a set of rotating devices 5 is set inside the box 2, which can drive the cable 1 to rotate around the UV lamp 3 and can also make the cable rotate on its own. The rotating device 5 is driven by the motor 6 on the top. During the thermal aging test, the motor 6 drives the rotating device 5, so that the cable 1 not only moves circumferentially around the UV lamp 3, but also rotates on its own, thereby ensuring that all parts of the cable surface are subjected to the same thermal aging treatment.

[0022] As attached Figure 3 As shown, the rotating device 5 includes an inner gear ring 5-1 that is fastened to the top of the housing 2, and a planetary carrier 5-2 that is transmission-connected to the motor 6. A plurality of planetary gears 5-3 are rotationally connected to the planetary carrier 5-2, and these planetary gears 5-3 are meshed with the inner gear ring 5-1. A clamping device 7 is coaxially connected to the bottom of each planetary gear 5-3. When the motor 6 is started, it drives the planetary carrier 5-2, thereby driving all the planetary gears 5-3 to rotate along the orbit around the ultraviolet lamp 3. Due to the meshing action between the planetary gears 5-3 and the inner gear ring 5-1, they not only realize circumferential rotation, but also cause the cable 1 to rotate on its own. Since the cable 1 is coaxially connected to the planetary gear 5-3, the deflection amplitude during its rotation is extremely small, which further enhances the uniformity of thermal aging.

[0023] The cable 1 is connected to the rotating device 5 through the clamping device 7. Figure 4 As shown, the clamping device 7 includes a connecting sleeve 7-1 whose top is coaxially and tightly connected to the planetary gear 5-3. Slots 7-2 are provided on both sides of the bottom of the connecting sleeve 7-1, and an eccentric clamping claw 7-4 is hinged in the slot 7-2 through a hinge shaft 7-3. During operation, only one end of the cable 1 needs to be inserted into the connecting sleeve 7-1, and the eccentric clamping claw 7-4 will automatically clamp the cable 1. At this time, the friction force generated between the eccentric clamping claw 7-4 and the cable 1, under the influence of the deadweight of the cable 1, forces the eccentric clamping claw 7-4 to retract inward, thereby firmly clamping the cable 1. If the cable 1 needs to be removed, the eccentric clamping claw 7-4 can be easily loosened by manually pushing it outward. In order to improve the clamping reliability, a torsion spring is also provided on the hinge shaft 7-3 to ensure that the eccentric clamping claw 7-4 is always in a state of retracting inward to maintain effective clamping of the cable 1.

[0024] In order to prevent the cable 1 from bending and deforming due to suspension, which would affect the accuracy of the test results, a counterweight 8 is connected to the end of the cable 1. The counterweight 8 is used to straighten the cable 1 to ensure that it remains straight throughout the thermal aging test, which helps to improve the aging uniformity of the cable 1. A through hole is provided in the center of the counterweight 8. When in use, one end of the cable 1 can be tied and passed through the hole to ensure a coaxial connection between the two, which is simple and effective.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A thermal aging test box for cable testing, used for performing a thermal aging test on a cable (1), characterized by: The invention comprises a box (2), an ultraviolet lamp (3) and an electric heating device (4); an opening and closing door (9) is provided on one side of the box (2); the electric heating devices (4) are provided on four side walls of the box (2); a cylindrical ultraviolet lamp (3) is provided at the center of the box (2); a rotating device (5) for driving a cable (1) to rotate along the circumference of the ultraviolet lamp (3) and to rotate on its own is provided above the box (2) corresponding to the ultraviolet lamp (3); a motor (6) for driving the rotating device (5) is provided on the top of the box (2); and the cable (1) is connected to the rotating device (5) via a clamping device (7).

2. The thermal aging test box for cable testing as claimed in claim 1, characterized in that: The rotating device (5) comprises an inner gear ring (5-1) which is correspondingly fastened to the top of the housing (2); a planetary carrier (5-2) which is transmission-connected to the motor (6) is arranged in the inner gear ring (5-1); the planetary carrier (5-2) is rotationally connected to a plurality of planetary gears (5-3); the planetary gears (5-3) are correspondingly meshed and connected to the inner gear ring (5-1); and a clamping device (7) is coaxially fastened to the bottom of the planetary gears (5-3).

3. The thermal aging test box for cable detection according to claim 1 or 2, characterized in that: The clamping device (7) comprises a connecting sleeve (7-1) whose top is coaxially and tightly connected to the planetary gear (5-3), and slots (7-2) are provided on both sides of the bottom of the connecting sleeve (7-1), and an eccentric clamping claw (7-4) is hinged in the slot (7-2) via a hinge shaft (7-3).

4. The thermal aging test box for cable detection as claimed in claim 3, characterized in that: The shaft body of the hinge shaft (7-3) is sleeved with a torsion spring used to automatically shrink the eccentric clamping claw (7-4) into the connecting sleeve (7-1).

5. The thermal aging test box for cable testing as claimed in claim 1, characterized in that: A counterweight (8) is connected to the bottom of the cable (1).

6. The thermal aging test box for cable testing as claimed in claim 1, characterized in that: A through hole is provided at the center of the counterweight block (8).

7. The thermal aging test box for cable testing as claimed in claim 1, characterized in that: A temperature sensor is provided in the box (2).

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