Fire-fighting switching module applied to low-voltage power distribution cabinet

Abstract

The utility model discloses a fire-fighting switching module applied to a low-voltage power distribution cabinet, which comprises a shell and a circuit board arranged in the shell, and a fuse F1, resistors R1-R6, a voltage stabilizing diode D1, triodes Q1 and Q2, a diode D2, a first light emitting diode VD1, a second light emitting diode VD2 and a relay K1 are integrated on the circuit board. According to the utility model, the DC 24V intermediate relay, the secondary line, the terminal and the like in the traditional switching function are integrated and modularized, so that the defects that correct logic is difficult to guarantee and fault points are difficult to check due to a large amount of wiring in the prior art are overcome, the safety is improved, the production efficiency is improved, faults are easy to check, and the production cost is reduced. And further optimization of the low-voltage power distribution cabinet is realized.

Description

Technical Field

[0001] The utility model relates to a fire-fighting cut-off part of a low-voltage power distribution cabinet in rail transportation industry, in particular to a fire-fighting cut-off module applied to a low-voltage power distribution cabinet. Background Art

[0002] At present, low-voltage distribution cabinets in the rail transit industry need to be equipped with a fire-fighting cut-off function. The existing solution is to use multiple traditional DC24V intermediate relays, secondary lines, and terminals in the circuit to achieve this function. However, its defects are: there are a large number of wirings, it is difficult to ensure the correct logic, and when a fault occurs, it is difficult to identify the fault point. Utility Model Content

[0003] The utility model aims to provide a fire-fighting cut-off module for low-voltage power distribution cabinets, which can improve safety, production efficiency and troubleshoot easily.

[0004] The purpose of the utility model is achieved through the following technical measures: a fire-fighting non-fire protection module applied to a low-voltage power distribution cabinet, characterized in that it includes a shell and a circuit board arranged in the shell, on which a fuse F1, resistors R1 to R6, a voltage-stabilizing diode D1, transistors Q1 and Q2, a diode D2, a first light-emitting diode VD1, a second light-emitting diode VD2 and a relay K1 are integrated, one end of the fuse F1 is connected to the positive electrode of the power input, and the other end is connected to the resistor R1, the resistor R5, the resistor R6, the cathode of the diode D2 and the coil of the relay K1, and the other end of the resistor R1 is connected to the cathode of the voltage-stabilizing diode D1, The positive electrode of the voltage regulator diode D1 is connected to the base of the transistor Q2 and the resistor R4. The other end of the resistor R4 is connected to the negative electrode of the power input, the emitter of the transistor Q1, the emitter of the transistor Q2, the positive electrode of the diode D2, and the other end of the coil of the relay K1. The resistor R5 is connected in series with the resistor R2. The other end of the resistor R2 is connected to the positive electrode of the first light-emitting diode VD1. The negative electrode of the first light-emitting diode VD1 is connected to the base of the transistor Q1 and the collector of the transistor Q2. The resistor R6 is connected in series with the resistor R3. The other end of the resistor R3 is connected to the positive electrode of the second light-emitting diode VD2. The negative electrode of the second light-emitting diode VD2 is connected to the collector of the transistor Q1.

[0005] The utility model integrates and modularizes the DC24V intermediate relay, secondary line, terminal, etc. in the traditional non-functional cut-off, overcomes the defects of the prior art that it is difficult to ensure correct logic and difficult to troubleshoot fault points due to the existence of a large number of wirings, improves safety, improves production efficiency, and makes it easy to troubleshoot faults, thereby achieving further optimization of the low-voltage distribution cabinet.

[0006] The utility model is provided with a fool-proof structure on the outer wall of the shell.

[0007] The foolproof structure of the utility model comprises a buckle and a pair of protrusions, the shell is a flat rectangular body, the buckle is located in the middle of the front of the shell, and the protrusions are located on both sides of the front of the shell.

[0008] The utility model is provided with a plurality of wiring ports connected with matching wiring harnesses on both sides of the shell, and the wiring ports include a switch auxiliary contact wiring port, a passive signal wiring port, a first passive normally open contact wiring port, a first contact common terminal wiring port, an active signal wiring port, a fire protection wiring port, a second contact common terminal wiring port, a second passive normally open contact wiring port, a third contact common terminal wiring port and a passive normally closed contact wiring port.

[0009] Compared with the prior art, the utility model has the following significant effects:

[0010] ⑴ The utility model integrates and modularizes the DC24V intermediate relay, secondary line, terminal, etc. in the traditional non-function, overcomes the defects of the prior art that it is difficult to ensure the correct logic and the fault point troubleshooting due to the existence of a large number of wiring, improves safety, improves production efficiency, and is easy to troubleshoot, thereby realizing further optimization of the low-voltage distribution cabinet.

[0011] ⑵The circuit of the utility model is composed of high-performance detection circuits, industrial-grade electronic components and other circuits. It adopts modular design, stable performance, strong scalability, simple installation, simple and beautiful appearance, customized wiring harness to prevent fools and errors, low later maintenance costs, reducing the installation, wiring, process, and labor costs of production personnel, and improving production efficiency.

[0012] ⑶The utility model is compact in size and adopts standard 35mm snap-on installation, which has fool-proof and error-proof functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0014] Figure 1 It is a schematic diagram of the circuit composition structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the wiring port of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the utility model connecting the supporting wiring harness;

[0017] Figure 4 It is a schematic diagram of the working principle of the utility model. DETAILED DESCRIPTION

[0018] like Figures 1 to 4As shown, the utility model is a fire-fighting non-fire-proof module applied to a low-voltage power distribution cabinet, comprising a housing 12 and a circuit board arranged in the housing 12, on which a fuse F1, resistors R1 to R6, a voltage-stabilizing diode D1, transistors Q1 and Q2, a diode D2, a first light-emitting diode VD1, a second light-emitting diode VD2 and a relay K1 are integrated, one end of the fuse F1 is connected to the positive electrode of the power input, and the other end is connected to the resistor R1, the resistor R5, the resistor R6, the cathode of the diode D2 and the coil of the relay K1, the other end of the resistor R1 is connected to the cathode of the voltage-stabilizing diode D1, and the anode of the voltage-stabilizing diode D1 is connected to the cathode of the voltage-stabilizing diode D1. The resistor R5 is connected in series with the resistor R2, the other end of the resistor R2 is connected to the positive electrode of the first light-emitting diode VD1, the negative electrode of the first light-emitting diode VD1 is connected to the base of the transistor Q1 and the collector of the transistor Q2, the resistor R6 is connected in series with the resistor R3, the other end of the resistor R3 is connected to the positive electrode of the second light-emitting diode VD2, the negative electrode of the second light-emitting diode VD2 is connected to the collector of the transistor Q1, see Figure 1 .

[0019] See also Figure 2 , Figure 3 In this embodiment, the shell 12 is a flat rectangular body with a length of 100 mm, a width of 54 mm, and a height of 32 mm. The shell 12 is small in size. A plurality of wiring ports connected to a matching wiring harness 13 are provided on both sides of the shell 12. The wiring ports include switch auxiliary contact wiring ports 1, 2, a passive signal wiring port 3, a first passive normally open contact wiring port 4, a first contact common terminal wiring port 5, an active signal wiring port 6, a fire protection wiring port 7, a second contact common terminal wiring port 8, a second passive normally open contact wiring port 9, a third contact common terminal wiring port 10, and a passive normally closed contact wiring port 11.

[0020] The utility model has foolproof and error-proof functions, and a foolproof structure is provided on the outer wall of the housing 12. In this embodiment, the foolproof structure includes a buckle 14 and a pair of protrusions 15, the buckle 14 is located in the middle of the front of the housing 12, and the protrusions 15 are located on both sides of the front of the housing 12, see Figure 3 , the utility model adopts standard 35mm snap-on installation.

[0021] The working principle of the utility model is: when the fire FAS system sends out a fire alarm active DC24V signal, the yellow LED indicator (first light-emitting diode VD1) lights up and outputs a normally open contact to trip the load switch, and outputs another normally open contact signal to the PLC system, and at the same time has the load switch auxiliary contact signal detection function, and feeds back the load switch disconnection signal to the fire FAS system through the contact. At this time, if the FAS fire system input voltage signal is lower than DC18V, the yellow LED indicator and the red LED indicator (second light-emitting diode VD2) light up at the same time, reminding the operation and maintenance personnel that the fire FAS system voltage output is too low, see Figure 4 .

[0022] The implementation methods of the utility model are not limited to this. According to the above content of the utility model, in accordance with the common technical knowledge and customary means in the field, without departing from the above basic technical ideas of the utility model, the utility model can also make other various forms of modifications, replacements or changes, all of which fall within the scope of protection of the utility model.

Claims

1. A fire protection cut-off module applied to a low-voltage power distribution cabinet, characterized in that: The invention comprises a shell and a circuit board arranged in the shell, wherein a fuse F1, resistors R1 to R6, a voltage-stabilizing diode D1, transistors Q1 and Q2, a diode D2, a first light-emitting diode VD1, a second light-emitting diode VD2 and a relay K1 are integrated on the circuit board, one end of the fuse F1 is connected to the positive electrode of the power input, and the other end is connected to the resistor R1, the resistor R5, the resistor R6, the negative electrode of the diode D2 and the coil of the relay K1, the other end of the resistor R1 is connected to the negative electrode of the voltage-stabilizing diode D1, the positive electrode of the voltage-stabilizing diode D1 is connected to the base of the transistor Q2 and the resistor R4 The other end of the resistor R4 is connected to the negative electrode of the power input, the emitter of the transistor Q1, the emitter of the transistor Q2, the positive electrode of the diode D2, and the other end of the coil of the relay K1. The resistor R5 is connected in series with the resistor R2. The other end of the resistor R2 is connected to the positive electrode of the first light-emitting diode VD1. The negative electrode of the first light-emitting diode VD1 is connected to the base of the transistor Q1 and the collector of the transistor Q2. The resistor R6 is connected in series with the resistor R3. The other end of the resistor R3 is connected to the positive electrode of the second light-emitting diode VD2. The negative electrode of the second light-emitting diode VD2 is connected to the collector of the transistor Q1.

2. The fire protection cut-off module applied to the low-voltage power distribution cabinet according to claim 1 is characterized in that: An anti-fool structure is arranged on the outer wall of the shell.

3. The fire protection cut-off module applied to the low-voltage power distribution cabinet according to claim 2 is characterized in that: The foolproof structure includes a buckle and a pair of protrusions. The shell is a flat rectangular body. The buckle is located in the middle of the front of the shell, and the protrusions are located on both sides of the front of the shell.

4. The fire protection cut-off module applied to the low-voltage power distribution cabinet according to claim 3 is characterized in that: A plurality of wiring ports connected to matching wiring harnesses are provided on both sides of the shell, and the wiring ports include a switch auxiliary contact wiring port, a passive signal wiring port, a first passive normally open contact wiring port, a first contact common terminal wiring port, an active signal wiring port, a fire protection wiring port, a second contact common terminal wiring port, a second passive normally open contact wiring port, a third contact common terminal wiring port and a passive normally closed contact wiring port.

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