一种电气控制柜控制端口扩展箱
By using signal isolation and power interlocking technology in the control port expansion box of the electrical control cabinet, the problems of line detection alarms and power conflicts caused by parallel connection of multiple control signals are solved, improving the reliability and safety of the electrical control system and simplifying the wiring process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG PUKANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
In the field of electrical control, when multiple control terminals control a single electrical equipment control box in parallel, there are problems such as multiple similar output signals being directly connected in parallel, causing line detection alarms; multiple DC power supplies being input simultaneously, causing power supply conflicts or faults in the equipment; and complex wiring in traditional expansion schemes, which affect the reliability and safety of the system.
The electrical control cabinet control port expansion box is used. Multiple control signals are isolated through signal isolation electromagnetic relay groups. The DC power interlock module realizes the single output of multiple DC power supplies. The signal and power lines are integrated with multi-layer PCB board. The pluggable device design reduces the complexity of external wiring.
It effectively solves the problems of multi-channel signal processing, power management and wiring reliability, improves the normal operation reliability of the system and the safety of the equipment, simplifies the wiring process and reduces maintenance costs.
Smart Images
Figure CN224520397U_ABST
Abstract
Claims
1. An electrical control cabinet control port expansion box, characterized by: The system includes an expansion enclosure (1), which contains an integrated terminal block (2) and a DC power interlock module (3). The normally open contact terminals of the DC power interlock module (3) are connected to the input port of the integrated terminal block (2) via insulated wires to form a single power transmission link. The integrated terminal block (2) is equipped with a multi-channel control signal input interface (4), a signal isolation electromagnetic relay module (5), a pluggable device base (6), and a status indicator light (7), which together form a control board. The integrated wiring board (2) uses a PCB board to integrate signal and power lines to reduce the complexity of external wiring; The multi-channel control signal input interface (4) uses several screw-type terminal interfaces, and the multi-channel control signal input interface (4) is connected to the signal isolation electromagnetic relay module (5) to receive external control signals; The status indicator (7) consists of several light-emitting diodes and is used to display the on / off status of each control signal and power output; The signal isolation electromagnetic relay module (5) includes several intermediate relays I (501) and several protective resistors (502). Each of the protective resistors (502) is connected in series with a light-emitting diode and then connected in parallel with the power supply pin of the intermediate relay I (501) to serve as an indicator. The output terminals of the intermediate relays I (501) are connected in parallel to the electrical equipment control box. Electrical isolation is achieved through the relay coil and contacts to avoid direct interference. The DC power supply interlock module (3) is composed of several normally closed contacts of intermediate relay group II connected in series, and is used to realize multi-channel power supply interlock through the series connection of normally closed contacts.
2. An electrical control cabinet control port expansion box as claimed in claim 1, characterized in that: Several pluggable device bases (6) are welded to the middle of the integrated terminal block (2); several intermediate relays I (501) are plugged into the pluggable device bases (6) respectively.
3. An electrical control cabinet control port expansion box as defined in claim 1, wherein: Several LEDs are soldered to the front of the integrated terminal block (2), and several pluggable device bases (6) correspond one to one LED.
4. An electrical control cabinet control port expansion box as defined in claim 1, wherein: The screw-type terminal interface is welded to the front of the integrated terminal block (2) near the edge.
5. An electrical control cabinet control port expansion box as defined in claim 1, wherein: The integrated terminal block (2) is mounted on the mounting plate (8) by screws. The mounting plate (8) is mounted on the bottom plate inside the expansion box (1) by bolts (9). An electrical rail (10) is mounted on the mounting plate (8) by screws. The DC power interlock module (3) is engaged on the electrical rail (10).