A circuit structure for detecting reliable connection of high-voltage cable of ultraviolet curing system

Abstract

The utility model discloses a kind of circuit structure for detecting the reliable connection of ultraviolet curing system high-voltage cable, including controller machine case and lamp holder machine case, the controller machine case is provided with main control panel and backplate, main control panel and backplate are connected by wire, backplate is connected with lamp holder machine case by cable, cable includes high-voltage transmission line and low-voltage control signal transmission line, main control panel is provided with relay group, lamp holder machine case is powered by low-voltage control signal transmission line and wire, and the attraction and release of relay group are controlled, relay group is used to control the closure and disconnection of the breaker of power supply, and power supply is connected with high-voltage transmission line.The utility model controls the breaker of power supply by relay group, so that when cable loosens or falls off, it can automatically disconnect the breaker to cut off power supply, so as to improve the fault response speed of equipment, ensure the safety of site.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage power supply system control, specifically to a circuit structure for detecting the reliable connection of high-voltage cables in ultraviolet curing systems. Background Technology

[0002] High-voltage cables in UV curing systems typically carry voltages above kilovolts. On one hand, unreliable connections can lead to increased resistance at conductor contact points, causing abnormal temperature rises according to Joule's law. Research data shows that 70% of serious defects in high-voltage cable faults are detected through temperature anomalies, while the national standard GB50217-2007 clearly specifies the maximum permissible temperature limit for cable conductors. On the other hand, poor contact or insulation defects at high-voltage cable connection points can easily trigger partial discharge, accelerating the aging of insulating materials such as polyethylene, leading to short circuits or breakdowns.

[0003] In UV curing systems, high-voltage power and some control signals are transmitted via cables between the high-voltage power controller and the lamp holders. In actual use, the power controller and lamp holders may be located in different spaces. The lamp holders are mostly installed on semiconductor production lines, while the controller is generally located in the machine room, with a distance of tens of meters between the two devices. During on-site installation and wiring, high-voltage transmission cables need to be reinstalled. In applications with frequent bending or vibration (such as automated production lines), cable connections must withstand mechanical stress. To ensure the normal operation of the equipment, reliable connection of the high-voltage cables must be guaranteed. Therefore, a circuit structure needs to be designed so that the power control box can react immediately to ensure on-site safety when the cable becomes loose or detached. Utility Model Content

[0004] The purpose of this invention is to provide a circuit structure for detecting the reliable connection of high-voltage cables in a UV curing system. This circuit structure controls the circuit breaker of the power supply through a relay group, so that when the cable becomes loose or falls off, the circuit breaker can be automatically disconnected to cut off the power supply, thereby improving the fault response speed of the equipment and ensuring on-site safety.

[0005] The technical solution adopted by this utility model to solve the above problems is:

[0006] A circuit structure for detecting the reliable connection of a high-voltage cable in a UV curing system includes a controller chassis and a lamp holder chassis. The controller chassis contains a main control board and a backplane, which are connected by a ribbon cable. The backplane is connected to the lamp holder chassis by a cable, which includes a high-voltage power transmission line and a low-voltage control signal transmission line. The main control board contains a relay group. The lamp holder chassis supplies power to the relay group and controls the activation and deactivation of the relay group through the low-voltage control signal transmission line and the ribbon cable. The relay group is used to control the closing and opening of the circuit breaker of the power supply. The power supply is connected to the high-voltage power transmission line.

[0007] In the above technical solution, preferably, the relay group includes relay REL8 and relay REL1. The lamp holder chassis controls relay REL8 through a signal, and relay REL8 provides a current loop to the coil of relay REL1.

[0008] In the above technical solution, preferably, the two terminals of the low-voltage control signal transmission line connected to the lamp holder chassis are short-circuited, and one terminal is used to provide voltage to the back panel, while the other terminal is used to control the relay REL8 by transmitting a signal.

[0009] In the above technical solution, preferably, a high-voltage transformer and a rectifier module are provided between the power supply and the high-voltage transmission line.

[0010] Compared with the prior art, this utility model has the following advantages and effects:

[0011] This invention controls the circuit breaker of the power supply via a relay group, and controls the activation and deactivation of the relay group by the output voltage from the lamp holder housing. When the cable terminal becomes loose or detached, the voltage supplied to the relay group by the lamp holder housing decreases, causing the relay group to release, thereby opening the circuit breaker and ultimately disconnecting the power supply to the lamp holder. Therefore, this invention can automatically disconnect the power supply when the cable terminal becomes loose or detached, thus improving the fault response speed of the equipment, enhancing equipment safety, ensuring on-site safety, preventing equipment damage, reducing the frequency of maintenance due to faults, and avoiding economic losses caused by power consumption or equipment damage. Attached Figure Description

[0012] Figure 1 This is a circuit topology diagram of a circuit structure used in this embodiment of the invention for detecting the reliable connection of a high-voltage cable in a UV curing system.

[0013] Figure 2 yes Figure 1 The internal circuit structure of the main control board.

[0014] The components include: controller housing 1, lamp holder housing 2, main control board 3, backplane 4, ribbon cable 5, cable 6, high-voltage transmission line 61, low-voltage control signal transmission line 62, relay group 7, power supply 8, circuit breaker 9, high-voltage transformer 10, and rectifier module 11. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0016] See Figures 1-2This embodiment describes a circuit structure for detecting the reliable connection of a high-voltage cable in an ultraviolet curing system. It includes a controller housing 1 and a lamp holder housing 2. The controller housing 1 houses a main control board 3 and a backplate 4, which are connected by a ribbon cable 5. The backplate 4 is connected to the lamp holder housing 2 via a cable 6, which includes a high-voltage transmission line 61 and a low-voltage control signal transmission line 62. A relay group 7 is mounted on the main control board 3. The lamp holder housing 2 supplies power to the relay group 7 and controls its engagement and disengagement via the low-voltage control signal transmission line 62 and the ribbon cable 5. The relay group 7 controls the closing and opening of the circuit breaker 9 of the power supply 8. The power supply 8 is connected to the high-voltage transmission line 61.

[0017] This invention controls the circuit breaker 9 of the power supply 8 via a relay group 7, and controls the engagement and disengagement of the relay group 7 by outputting voltage to the relay group 7 through the lamp holder housing 2. When the terminal of the cable 6 becomes loose or detached, the voltage supplied by the lamp holder housing 2 to the relay group 7 decreases, causing the relay group 7 to disengage, thereby opening the circuit breaker 9 and ultimately disconnecting the power supply 8 from the lamp holder. Therefore, this invention can automatically disconnect the power supply 8 when the terminal of the cable 6 becomes loose or detached, thereby improving the fault response speed of the equipment, enhancing equipment safety, ensuring on-site safety, preventing equipment damage, reducing the frequency of maintenance due to faults, and avoiding economic losses caused by power consumption or equipment damage.

[0018] This circuit has a simple structure, uses simple electronic components, is more reliable, and has a lower cost.

[0019] See Figure 1 The relay group 7 includes relay REL8 and relay REL1. The lamp holder housing 2 controls relay REL8 through a signal, and relay REL8 provides a current circuit to the coil of relay REL1.

[0020] See Figure 1 The low-voltage control signal transmission line 62 is short-circuited to the two terminals connected to the lamp holder housing 2, and one terminal is used to provide voltage to the back plate 4, while the other terminal transmits signals to control the relay REL8.

[0021] Industrial semiconductor high-voltage power supplies 8 pose certain risks during use, with DC-side high-voltage outputs exceeding 5000 volts. Loose connections at the terminals of the high-voltage transmission line 61 can lead to arcing or excessive resistance causing overheating, potentially damaging equipment or even causing a fire over time. This utility model patent addresses this by designing the terminal pins of the high-voltage transmission line 61 to be significantly longer than those of the low-voltage control signal transmission line 62. This physical structure ensures a more reliable connection for the high-voltage transmission line 61 compared to the low-voltage control signal transmission line 62. The low-voltage control signal transmission line 62 transmits detection signals; when the detection signal is normal, the transmission from the high-voltage transmission line 61 is guaranteed to be reliable and safe. This allows for equipment safety monitoring and maintenance through status display, eliminating the need for on-site personnel to inspect the cable 6 connection status. Furthermore, compared to other methods relying on position switches or other sensors, this eliminates the need for additional external equipment, resulting in a simpler circuit structure and space-saving design.

[0022] See Figure 1 A high-voltage transformer 10 and a rectifier module 11 are provided between the power supply 8 and the high-voltage transmission line 61 to convert the AC power provided by the power supply 8 into DC high-voltage power.

[0023] See Figure 2 The main control board 3 has an internal circuit structure. Only after the hardware of this utility model has been reliably connected can the software switch the relay group 7 and control the high voltage output. When the cable 6 is detected as abnormal, the software control fails and the relay group 7 cannot be switched.

[0024] The two terminals of the low-voltage control signal transmission line 62 connected to the lamp holder chassis 2 are shorted. After the cable 6 is connected, the two signals transmitted from the controller chassis 1 are shorted. These two signals correspond to the CONN2-2 and CONN2-8 pin signals on the back panel 4, where the CONN2-8 signal is supplied with 24V voltage by the back panel 4. On the back panel 4 of the controller chassis 1, the CONN2-2 signal is connected to the CONN4-6 pin. The back panel 4 inside the controller chassis 1 is connected to the main control board 3 via a 40p flexible flat cable 5, connecting CONN4 and CONN5. The CONN4-6 signal on the back panel 4 is transferred to the CONN5-4 pin. At the same time, the CONN5-4 signal directly controls the signal relay REL8. One end of the coil of the relay REL8 is grounded. The 24V voltage of CONN5-4 powers the coil, forming a circuit. The relay REL8 is energized, and its contact 7 is connected to contact 6, while the REL1_1 signal is grounded. Meanwhile, REL1_1 serves as the grounding point for the coil of relay REL1, providing current to the coil. Once the base voltage of the software-controlled transistor Q5 exceeds 0.7V, transistor Q5 conducts, allowing current to flow through LED11. The base voltage of transistor Q6 then drops, turning it on. This connects the coil of relay REL1 to 24V, and in conjunction with the REL1_1 signal, a current loop is created in the coil of relay REL1, causing relay REL1 to engage. Signals CONN6-10 and CONN6-3 within the CONN6 interface control the circuit breaker 9 to engage, supplying power to the primary side of high-voltage transformer 10, and the controller begins supplying power to the lamp holder.

[0025] Conversely, if cable 6 becomes loose or detached, the coil of relay REL8 will be de-energized, and the REL1-1 signal will be disconnected from ground. At this point, regardless of whether the software control signal can affect the output voltage on the REL1 side, because the coil of relay REL1 loses its current loop, the CONN6-10 signal voltage will be 0. Therefore, circuit breaker 9 will trip, the primary side of high-voltage transformer 10 will lose its power input, and the controller will no longer be able to provide power to the lamp holder. At this time, the software control will completely fail, thus enabling the software to not participate in control once an abnormal connection is detected and an alarm is triggered, greatly shortening the equipment's response time. This circuit structure greatly improves the equipment's fault response and enhances its safety.

[0026] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A circuit structure for detecting reliable connection of high-voltage cables in a UV curing system, characterized in that: The system includes a controller housing and a lamp holder housing. The controller housing contains a main control board and a backplane, which are connected by a ribbon cable. The backplane is connected to the lamp holder housing via a cable containing high-voltage power transmission lines and low-voltage control signal transmission lines. The main control board contains a relay group. The lamp holder housing supplies power to the relay group and controls the activation and deactivation of the relay group via the low-voltage control signal transmission lines and the ribbon cable. The relay group is used to control the closing and opening of the power supply circuit breaker. The power supply is connected to the high-voltage power transmission lines.

2. The circuit structure for detecting reliable connection of high-voltage cables in a UV curing system according to claim 1, characterized in that: The relay group includes relay REL8 and relay REL1. The lamp holder chassis controls relay REL8 via a signal, and relay REL8 provides a current loop to the coil of relay REL1.

3. The circuit structure for detecting reliable connection of high-voltage cables in a UV curing system according to claim 1, characterized in that: The two terminals of the low-voltage control signal transmission line connected to the lamp holder chassis are shorted, and one terminal is used to provide voltage to the back panel, while the other terminal transmits signals to control the relay REL8.

4. The circuit structure for detecting reliable connection of high-voltage cables in a UV curing system according to claim 1, characterized in that: A high-voltage transformer and a rectifier module are installed between the power supply and the high-voltage transmission line.

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