Shield door safety circuit indicating lamp control device

Abstract

The utility model provides a shield door safety circuit indicating lamp control device comprising a waterproof control box, a switch signal conversion circuit and a return lamp control circuit are arranged in the waterproof control box, and the switch signal conversion circuit is connected with the return lamp control circuit. The switching signal conversion circuit is used for converting a safety loop circuit signal switching value into a digital value, and the return lamp control circuit is used for reversely controlling the turn-on and turn-off of a return lamp through a digital value signal; the safety return lamp is controlled according to a PSL safety return signal, the construction amount is small, safety is high, the safety return lamp can visually display the state of the safety return, platform personnel can know the closing and locking state of each shielding door through the safety return lamp and do not need to see an indicator light of each shielding door, and the working efficiency is improved. The safety return lamp is installed near the position of a driver, and a station person can send a hand signal to the driver without turning around.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail transit, and particularly relates to a control device for an indicator light of a platform screen door safety loop. Background Art

[0002] In the existing platform screen door system of the subway, there is a door closing indicator light above each passenger compartment door to indicate the closed and locked state of the corresponding door. At the same time, the closed and locked state of each door is connected to the PSL (local control panel) box through a series circuit connection of signals, and enters the machine room through a transmission cable. Under the existing loop state setting, when the driver observes from the platform, it is impossible to fully confirm whether all the platform screen doors are closed without pinching people, and it is necessary to rely on the assistance of the platform duty personnel to confirm. However, the platform duty personnel need to confirm that the indicator lights above each platform screen door are extinguished (closed and locked) before signaling to the driver, which seriously affects the efficiency of train arrival and departure. At the same time, the safety loop signal in the system can only be viewed on the platform screen door workstation in the car control room and does not play a role during the train operation organization at the station. Summary of the Invention

[0003] In view of this, the utility model aims to overcome the above deficiencies in the prior art and proposes a control device for an indicator light of a platform screen door safety loop.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A control device for an indicator light of a platform screen door safety loop includes a waterproof control box. A switch signal conversion circuit and a loop light control circuit are arranged in the waterproof control box. The switch signal conversion circuit is connected to the loop light control circuit. The switch signal conversion circuit is used to convert the switch quantity of the safety loop circuit signal into a digital quantity, and the loop light control circuit is used to reversely control the on and off of the loop light through the digital quantity signal;

[0006] The switch signal conversion circuit includes a resistor R1, a resistor R2, and a diode D1. The first end of the resistor R1 is connected to the +24V power supply voltage, the second end is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is grounded;

[0007] The loop light control circuit includes a resistor R5, a resistor R6, a diode D2, a triode Q1, and a relay. The first end of the resistor R5 is connected to the +24V power supply, the negative electrode of the diode D2, and the relay. The second end of the resistor R5 is connected to the first end of the resistor R6. The second end of the resistor R6 is connected to the base of the triode Q1. The positive electrode of the diode D2 is connected to the emitter of the triode Q1. The collector of the triode Q1 is grounded. The second end of the relay is connected to the emitter of the triode Q1. The relay is connected to the loop light.

[0008] Further, the control device for the platform screen door safety loop indicator light is connected to the safety loop light through a loop light power supply wire.

[0009] Further, the control device for the platform screen door safety loop indicator light is also connected to a quick-release connector through a loop light PSL safety loop signal wire.

[0010] Further, the resistance value of resistor R1 is 1K, the resistance value of resistor R2 is 50 ohms, the resistance value of resistor R5 is 4.7K, and the resistance value of resistor R6 is 100 ohms.

[0011] Further, a waterproof terminal 8 is provided on the wall of the waterproof control box.

[0012] Compared with the prior art, the control device for the platform screen door safety loop indicator light of the present utility model has the following advantages:

[0013] The safety loop light of the present utility model is controlled according to the PSL safety loop signal, with a small amount of construction work and high safety. The safety loop light can visually display the status of the safety loop. Platform personnel can know the closed and locked status of each platform screen door through the safety loop light, without having to check the indicator lights of each platform screen door separately. The installation position of the safety loop light is near the position where the driver is located, and platform personnel do not have to turn around to give a signal to the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0015] Figure 1 is an application schematic diagram of a control device for a platform screen door safety loop indicator light of the present utility model;

[0016] Figure 2 is a schematic diagram of the principle of a control device for a platform screen door safety loop indicator light of the present utility model;

[0017] Figure 3 is a schematic diagram of a switch signal conversion circuit of the present utility model;

[0018] Figure 4 is a schematic diagram of a loop light control circuit of the present utility model.

[0019] DESCRIPTION OF THE REFERENCE NUMERALS

[0020] 1 - PSL safety loop signal wire; 2 - loop light power supply wire; 3 - waterproof control box; 4 - safety loop light; 5 - quick-release connector; 6 - switch signal conversion circuit; 7 - loop light control circuit; 8 - waterproof terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific circumstances.

[0024] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0025] As Figures 1-4 shown, the present utility model provides a control device for the indicator light of the safety loop of a screen door, including a waterproof control box 3. A switch signal conversion circuit 6 and a loop light control circuit 6 are provided inside the waterproof control box 3. The switch signal conversion circuit 6 is used to convert the switch quantity of the safety loop circuit signal into a digital quantity, and the loop light control circuit 7 is used to reversely control the on and off of the loop light through the digital quantity signal.

[0026] The switch signal conversion circuit 6 includes a resistor R1, a resistor R2, and a diode D1. The first end of the resistor R1 is connected to the +24V power supply voltage, the second end is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the positive electrode of the diode D1, and the negative electrode of the diode D1 is grounded; wherein, the input signal of the switch signal conversion circuit is taken from the safety loop switch signal in the PSL box;

[0027] The circuit lamp control circuit 7 includes a resistor R5, a resistor R6, a diode D2, a triode Q1, and a relay. The first end of the resistor R5 is connected to the +24V power supply, the negative electrode of the diode D2, and the relay. The second end of the resistor R5 is connected to the first end of the resistor R6. The second end of the resistor R6 is connected to the base of the triode Q1. The positive electrode of the diode D2 is connected to the emitter of the triode Q1. The collector of the triode Q1 is grounded. The relay is connected to the circuit lamp.

[0028] Specifically, the platform screen door safety loop indicator control device is connected to the safety loop lamp 4 through the loop lamp power supply line 2.

[0029] Specifically, the platform screen door safety loop indicator control device is also connected to the quick-release connector 5 through the loop lamp PSL safety loop signal 1 line. The cable for leading out the safety loop signal from the PSL box is connected to the quick-release connector 5.

[0030] Specifically, the resistance value of the resistor R1 is 1K, the resistance value of the resistor R2 is 50 ohms, the resistance value of the resistor R5 is 4.7K, and the resistance value of the resistor R6 is 100 ohms.

[0031] In the present utility model, a waterproof terminal 8 is provided on the wall of the waterproof control box 3, which is responsible for sealing the gap between the cable and the housing and has waterproof ability.

[0032] The switch signal conversion circuit 6 of the present utility model is as Figure 3 shown. In the conversion circuit, the resistor R1, the resistor R2, and the diode D1 jointly divide the voltage of the 24V power supply. When the PSL safety loop is not established, the switch quantity is in an open (open circuit) state. At this time, the voltage at point A is approximately 24V * R2 / (R1 + R2) = 2V, and a digital quantity "0" can be provided on the digital quantity side. When the PSL safety loop is established, the switch quantity is in a closed state, providing a 24V voltage signal to the ground. At this time, the voltage of point A to the ground is 24V, and a digital quantity "1", that is, a 24V voltage signal, can be provided on the digital quantity side.

[0033] The output of the switch signal conversion circuit can control the circuit lamp control circuit to control the lighting and extinguishing of the safety loop lamp. When the digital quantity signal is "1", the resistor R6 and the triode Q1 jointly divide the 24V voltage. The voltage of point B to the ground is approximately 24V * RQ1 / (RQ1 + R6) = 12V, making the triode Q1 conduct. Point C is grounded, the relay is excited, the input node is disconnected from the normally open node, the power supply of the safety loop lamp is disconnected, and the safety loop lamp goes out. When the digital quantity signal is "0", point B is 0V, the triode is cut off, the input node of the relay is connected to the normally open node, the power supply of the safety loop lamp is closed, and the safety loop lamp lights up.

[0034] When the utility model is in use, the loop light control circuit 7 controls the on / off of the loop light in a reverse manner through digital signals. The extinguishing of the loop light represents the normal state, and the lighting of the loop light represents the state where the safety loop is not established, which meets the requirements of the existing status indication of the platform screen door indicator lights in the rail transit platform area and is convenient for the platform personnel and the driver to confirm.

[0035] The above are only the preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the utility model shall be included within the protection scope of the utility model.

Claims

1. A control device for the safety loop indicator light of a platform screen door, characterized in that: It includes a waterproof control box (3), and a switch signal conversion circuit (6) and a loop light control circuit (7) are arranged in the waterproof control box (3). The switch signal conversion circuit (6) is connected to the loop light control circuit (7). The switch signal conversion circuit (6) is used to convert the switch quantity of the safety loop circuit signal into a digital quantity, and the loop light control circuit (7) is used to reversely control the on and off of the loop light through the digital quantity signal; The switch signal conversion circuit (6) includes a resistor R1, a resistor R2, and a diode D1. The first end of the resistor R1 is connected to the +24V power supply voltage, the second end is connected to the first end of the resistor R2, the second end of the resistor R2 is connected to the positive pole of the diode D1, and the negative pole of the diode D1 is grounded; The loop light control circuit (7) includes a resistor R5, a resistor R6, a diode D2, a triode Q1, and a relay. The first end of the resistor R5 is connected to the +24V power supply, the negative pole of the diode D2, and the first end of the relay. The second end of the resistor R5 is connected to the first end of the resistor R6. The second end of the resistor R6 is connected to the base of the triode Q1. The positive pole of the diode D2 is connected to the emitter of the triode Q1. The collector of the triode Q1 is grounded. The second end of the relay is connected to the emitter of the triode Q1, and the relay is connected to the loop light.

2. The control device for the safety loop indicator light of a screen door according to claim 1, wherein: The control device for the safety loop indicator light of the screen door is connected to the safety loop light (4) through the loop light power supply line (2).

3. The control device for the safety loop indicator light of a screen door according to claim 1, wherein: The control device for the safety loop indicator light of the screen door is also connected to a quick-release connector (5) through the loop light PSL safety loop signal (1) line.

4. A control device for a safety loop indicator of a platform screen door according to claim 1, characterized in that: The resistance value of the resistor R1 is 1K, the resistance value of the resistor R2 is 50 ohms, the resistance value of the resistor R5 is 4.7K, and the resistance value of the resistor R6 is 100 ohms.

5. The control device for the safety loop indicator light of a screen door according to claim 1, characterized in that: A waterproof terminal (8) is provided on the wall of the waterproof control box.

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