Alarm circuit and alarm device of railway signal power supply system

Abstract

The utility model discloses an alarm circuit and alarm device of railway signal power supply system, alarm circuit includes resistance R107, R107 one end and alarm logic signal receiving end meet, R107 other end passes through triode Q104 and photoelectric coupler U102 1st pin meet, U102 4th pin and direct current power DC2, relay JD2 1st pin and diode D103 cathode meet, D103 anode respectively with JD2 8th pin and triode Q105 3rd pin meet, U102 3rd pin and resistance R109 one end and resistance R110 one end are connected, R110 other end and Q105 1st pin meet, JD2 switch contact and relay 1KA coil contact meet, 1KA switch contact is connected with buzzer through change-over switch 4SA. The utility model can send alarm prompt in time reliably after receiving alarm logic signal, and remind staff to take countermeasures.

Description

Technical Field

[0001] This utility model relates to the technical field of railway signal power supply systems, and in particular to an alarm circuit and an alarm device for railway signal power supply systems. Background Technology

[0002] The railway signal power supply system is a power supply device that supplies power to the station signal equipment. It is in a state of uninterrupted power supply. The railway signal power supply system includes power supply panels, uninterruptible power supplies (UPS) and battery packs. These devices may malfunction during operation. Timely alarms after a malfunction can effectively avoid and reduce operational risks caused by the power supply system.

[0003] Currently, the existing alarm circuits in the railway signal power supply system can only trigger alarms based on the grounding status of switches within the power supply panel, such as the switching status of auxiliary contacts of output circuit breaker switches. They cannot aggregate the alarm logic signals from the existing power supply panel monitoring units of the railway signal power supply system to trigger alarms, thus failing to provide alarm prompts and timely reminders to staff to take appropriate measures.

[0004] It should be noted that if the alarm logic signal of the original power supply panel monitoring unit of the railway signal power supply system is a high level (e.g., a high level of 3V), it means that the operation is normal and no alarm is needed. However, if it is a low level (e.g., a low level of 0V), an alarm is required.

[0005] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an alarm circuit and an alarm device for a railway signal power supply system.

[0007] Therefore, this utility model provides an alarm circuit, characterized in that it includes an optocoupler U102, transistors Q104 to Q105, relay JD2, relay 1KA, changeover switch 4SA, diode D103, and buzzer 2HAU.

[0008] One end of resistor R107 is connected to alarm logic signal receiver A;

[0009] The other end of resistor R107 is connected to pin 1 of optocoupler U102 through transistor Q104;

[0010] Pin 4 of optocoupler U102 is connected to DC power supply DC2, pin 1 of relay JD2, and the cathode of diode D103, respectively.

[0011] The anode of diode D103 is connected to pin 8 of relay JD2 and pin 3 of transistor Q105, respectively.

[0012] Pin 3 of optocoupler U102 is connected to one end of resistor R109 and one end of resistor R110, respectively;

[0013] The other end of resistor R109 is grounded after intersecting with pin 2 of transistor Q105 at the busbar.

[0014] The other end of resistor R110 is connected to pin 1 of transistor Q105;

[0015] The switching contacts of relay JD2 are also connected to the coil contacts of relay 1KA;

[0016] The switching contacts of relay 1KA are connected to buzzer 2HAU via changeover switch 4SA.

[0017] In addition, this utility model also provides an alarm device for a railway signal power supply system, which includes the alarm circuit as described above.

[0018] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides an alarm circuit and an alarm device for a railway signal power supply system. The design is scientific and can collect (i.e., acquire) the alarm logic signals of the original power supply panel monitoring unit of the railway signal power supply system and issue alarm prompts in a timely and reliable manner (specifically, audible and visual alarm prompts), thereby reminding staff to take countermeasures in a timely manner, which has significant practical significance.

[0019] The alarm circuit designed in this invention can promptly and reliably issue an alarm prompt upon receiving the alarm logic signal from the existing power supply panel monitoring unit of the railway signal power supply system, reminding staff to take appropriate measures. Specifically, receiving a high-level alarm logic signal (e.g., 3V) indicates normal operation and no alarm is needed, while receiving a low-level alarm logic signal (e.g., 0V) requires an alarm. Attached Figure Description

[0020] Figure 1 A schematic diagram of an alarm circuit provided by this utility model;

[0021] Figure 2 This utility model provides an electrical schematic diagram of the power supply for an alarm circuit. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] See Figure 1 , Figure 2 This utility model provides an alarm circuit, including optocoupler U102, transistors Q104 to Q105, relay JD2, relay 1KA, changeover switch 4SA, diode D103 and resistors R107 to R110, and buzzer 2HAU;

[0026] One end of resistor R107 is connected to alarm logic signal receiver A;

[0027] The other end of resistor R107 is connected to pin 1 of optocoupler U102 through transistor Q104;

[0028] Pin 4 of optocoupler U102 is connected to DC power supply DC2, pin 1 of relay JD2, and the cathode of diode D103, respectively.

[0029] The anode of diode D103 is connected to pin 8 of relay JD2 and pin 3 of transistor Q105, respectively.

[0030] Pin 3 of optocoupler U102 is connected to one end of resistor R109 and one end of resistor R110, respectively;

[0031] The other end of resistor R109 is grounded after intersecting with pin 2 of transistor Q105 at the busbar.

[0032] The other end of resistor R110 is connected to pin 1 of transistor Q105;

[0033] The switching contacts (i.e., switch contacts) of relay JD2 are also connected to the coil contacts of relay 1KA;

[0034] The switching contacts of relay 1KA are connected to buzzer 2HAU via changeover switch 4SA.

[0035] It should be noted that pin 1 and pin 8 of relay JD2 are the coil power supply positive and coil power supply negative terminals, respectively, and are the coil contacts.

[0036] In this utility model, specifically, the alarm logic signal receiving terminal A is used to receive the alarm logic signal output by the original power supply panel monitoring unit of the railway signal power supply system. If the railway signal power supply system is operating normally and no alarm is required, the original power supply panel monitoring unit of the railway signal power supply system outputs a high-level (e.g., 3V high level) alarm logic signal. If an alarm is required, it outputs a low-level (e.g., 0V low level) alarm logic signal.

[0037] It should be noted that in this utility model, the alarm logic signal receiving terminal A is used to receive the signal from the original power supply panel monitoring unit of the railway signal power supply system. The power supply panel monitoring unit transmits the signal through its internal microcontroller. Specifically, the microcontroller can be a microcontroller (single-chip microcontroller) of model STM32F103R8T6 manufactured by STMicroelectronics. The alarm logic signal is output from the IO pins (input and output) of the microcontroller and transmitted to the alarm logic signal receiving terminal A.

[0038] In this utility model, specifically, the railway signal power supply system where the power supply panel monitoring unit is located is a mature, widely used, and operational railway signal power supply system, such as the PK type railway signal power supply system produced by Tianjin Railway Signal Co., Ltd.

[0039] In this invention, specifically, the fourth switching contact of relay JD2 is connected to the coil contact A1 of relay 1KA.

[0040] The coil contact A2 of relay 1KA is connected to the neutral terminal N of the second AC power supply AC2;

[0041] The third switch contact of relay JD2 is connected to the live wire L of the second AC power supply AC2.

[0042] In practice, the second AC power supply AC2 is a 24V AC power supply, specifically a single-phase AC power supply.

[0043] It should be noted that, see Figure 1 The fourth and third switching contacts of relay JD2 are normally open contacts, while the third and second switching contacts are normally closed contacts. When the coil of relay JD2 is energized, the fourth and third switching contacts change from open to closed, and the third and second switching contacts change from closed to open. Therefore, the energization of the coil of relay 1KA can be controlled by the state of the contacts on relay JD2.

[0044] It should be noted that relay JD2 is a well-established and technologically mature electrical component. For example, it could be an electromagnetic relay of model HFD3 / 24 manufactured by Xiamen Hongfa Electroacoustic Co., Ltd. Relay JD2, in conjunction with optocouplers, transistors, and other devices, can convert the alarm logic signal received from the original power supply panel monitoring unit of the railway signal power supply system into a switching signal, which is used to control whether the coil of another relay 1KA is energized.

[0045] It should be noted that relay JD2 is in Figure 1 The screen displays 8 pins, of which pins 1 and 8 are coil pins (i.e., contacts), pins 5, 6 and 7 form a set of full contacts, and pins 2, 3 and 4 form another set of full contacts.

[0046] In specific implementation, for relay JD2, after the coil is energized, the contacts of pins 4 and 3 close, thereby energizing the coil of relay 1KA. In addition, the set of contacts of pins 5, 6 and 7 of relay JD2 is reserved in the circuit, that is, it is unused for the time being.

[0047] In this utility model, specifically, the 11th switch contact of relay 1KA is connected to the neutral terminal N of the first AC power supply AC1.

[0048] The 14th switch contact of relay 1KA is connected to the 13th pin of changeover switch 4SA;

[0049] The 12th switch contact of relay 1KA is connected to the 23rd pin of changeover switch 4SA;

[0050] After the busbars intersect, pins 14 and 24 of the changeover switch 4SA are connected to pin 2 of the buzzer 2HAU.

[0051] The first pin of the buzzer 2HAU is connected to the live wire L of the first AC power supply AC1.

[0052] In practice, the first AC power supply AC1 is a 220V AC power supply, specifically a single-phase AC power supply.

[0053] It should be noted that relay 1KA is a well-established and technologically mature electrical component. For example, it could be an electromagnetic relay manufactured by ABB (China) Co., Ltd., model CR-M230AC2L. The function of relay 1KA is as follows: when relay JD2 is engaged or the circuit breaker / module contacts are closed, the coil of relay 1KA is energized, and pins 11 and 14 of relay 1KA are closed. This closes pins 13 and 14 of the changeover switch (i.e., rotary switch) 4SA, connecting the power supply to buzzer 2HAL, causing buzzer 2HAL to sound and flash.

[0054] It should be noted that the 1KA relay is in Figure 1 The display shows 5 pins, of which pins A1 and A2 are coil pins (i.e., contacts), and pins 11, 12, and 14 form a group of full contacts.

[0055] In specific implementation, for relay 1KA, after the coil of relay 1KA is energized, the contacts of pin (i.e., contact) 11 and pin 14 are closed.

[0056] In this utility model, it should be noted that the changeover switch 4SA is a well-established and known electrical component, such as a changeover switch (rotary switch) of model LA38-20CX3 / 204 manufactured by Jiangyin Changjiang Electric Co., Ltd. For this model of changeover switch, turning the changeover switch (rotary switch) 4SA to the "maintenance" position will cut off the sounding of the buzzer 2HAU, ensuring that the buzzer 2HAU will not sound regardless of whether the current state is an alarm state.

[0057] It should be noted that the changeover switch 4SA is in Figure 1 The display shows four pins. If the selector switch (rotary switch) 4SA is set to the "alarm" position, pins 13 and 14 will power on the buzzer 2HAU in alarm mode, causing the buzzer 2HAU to sound. If the selector switch (rotary switch) 4SA is set to the "maintenance" position, pins 23 and 24 will power on the buzzer 2HAU in non-alarm mode (when pins 11 and 12 of relay 1KA are closed), causing the buzzer 2HAU to sound.

[0058] In its specific implementation, the changeover switch 4SA has four pins: pin 13, pin 14, pin 23, and pin 24. The device selects whether pins 13 and 14 or pins 23 and 24 are connected by rotating its handle in different directions.

[0059] In this invention, it should be noted that the buzzer 2HAU is a well-established and known electrical component. For example, it can be a buzzer manufactured by Jiangyin Changjiang Electric Co., Ltd., model CDY-22D / 41, with an input power supply of AC220V. The working voltage of this buzzer is AC220V. The buzzer 2HAU is used to emit an audible and visual alarm when an alarm is triggered.

[0060] In this utility model, it should be noted that in order to ensure that the failure of the alarm control circuit does not affect the first AC power supply AC1, the second AC power supply AC2 uses the power output of the isolation transformer T after isolation. The output of the isolation transformer T is AC24V.

[0061] For specific implementation details, please refer to [link / reference]. Figure 1 , Figure 2 As shown, the live wire L and neutral wire N of the first AC power supply AC1 are connected to the I1 and I2 terminals of the primary side of the isolation transformer T, respectively.

[0062] Terminals III1 and III2 of the isolation transformer T are used to output the second AC power supply AC2 (specifically, AC24V).

[0063] Terminal Ⅲ1 on the secondary side of the isolation transformer T serves as the live wire L of the second AC power supply AC2 and is connected to the third switch contact of the relay JD2.

[0064] Terminal Ⅲ2 on the secondary side of the isolation transformer T serves as the neutral terminal N of the second AC power supply AC2 and is connected to the coil contact A2 of the relay 1KA.

[0065] It should be noted that, see Figure 2 As shown, the second AC power supply AC2 uses the power output from the isolation transformer T after isolation. The isolation transformer T outputs AC24V. Terminals I1 and I2 of the isolation transformer T are the two terminals on the primary side of the transformer, with an input voltage of AC220V (specifically provided by the first AC power supply AC1). The secondary side of the isolation transformer T has two coils (windings) for output. Terminals II1 and II2 can be used to supply power to other circuits outside of this patent. Terminals III1 and III2 of the isolation transformer T are used to output AC24V (i.e., to output the second AC power supply AC2), which is used to provide operating power for the relay 1KA. This isolation transformer T is a mature electrical component with existing technology; for example, a transformer of model BDX300VA manufactured by Tianjin Yuanhe Huatie Electrical Equipment Co., Ltd. can be used.

[0066] In this invention, specifically, the other end of resistor R107 is connected to pin 1 of transistor Q104;

[0067] Pin 3 of transistor Q104 is connected to DC power supply DC1;

[0068] The second pin of transistor Q104 is connected to the first pin of optocoupler U102;

[0069] In this invention, specifically, the second pin of the optocoupler U102 is grounded through resistor R108;

[0070] In practice, resistor R108 has a resistance of 1.5K ohms and is a surface mount resistor.

[0071] It should be noted that in this invention, the first pin of transistors Q104 and Q105 is the base, the second pin is the emitter, and the third pin is the collector.

[0072] In this invention, specifically, resistor R109 has a resistance of 100K ohms, resistor R110 has a resistance of 39K ohms, and resistor R107 has a resistance of 51K ohms; all of these are surface mount resistors.

[0073] In this invention, specifically, the DC power supply DC1 is a 5V DC power supply.

[0074] In this invention, specifically, the DC power supply DC2 is a +24V DC power supply.

[0075] In this invention, specifically, an indicator light is connected in parallel to both ends of the buzzer 2HAU.

[0076] In this invention, diode D103 is a rectifier diode, model number 1N4007G.

[0077] In this invention, the transistors Q104 and Q105 can be of type 8050.

[0078] In this invention, it should be noted that the optocoupler U102 is a well-established and known electrical component. For example, it could be an optocoupler manufactured by Everlight Electronics Co., Ltd., model EL817S1C, branded as Everlight. The optocoupler U102 serves as an optocoupler in the circuit, providing photoelectric isolation.

[0079] It should be noted that for optocoupler U102, its first pin is the anode of the internal light-emitting diode, the second pin of optocoupler U1 is the cathode of the internal light-emitting diode, the third pin of optocoupler U1 is the emitter of the internal phototransistor, and the fourth pin of optocoupler U1 is the collector of the internal phototransistor.

[0080] It should be noted that, for this utility model, after the alarm signal receiving end A receives the alarm signal (e.g., a low-level signal) input from the original power panel monitoring unit of the railway signal power supply system, the coil of relay JD2 is energized and its normally open contact closes, thereby energizing the coil of relay 1KA and closing its normally open contact. At this time, the buzzer 2HAU can be driven to sound, and the indicator light HL connected in parallel with the buzzer 2HAU is energized and illuminates, realizing an audible and visual alarm, thereby promptly reminding the staff that there is a fault and that countermeasures need to be taken.

[0081] In addition, when staff receive an alarm and perform the corresponding inspection, if the fault has been corrected or the inspection reveals that there is no actual fault, and thus the alarm needs to be cleared, staff only need to rotate the changeover switch 4SA from the "warning position" to the "maintenance position" to clear the alarm.

[0082] To better understand the technical solution of this utility model, the working principle of this utility model is explained below.

[0083] I. Under normal circumstances, the selector switch (rotary switch) 4SA is in the "warning" position. The circuit principle when the selector switch (rotary switch) 4SA is in the "warning" position is described below.

[0084] 1. When the railway signal power supply system is working normally, the alarm logic signal of the original power supply panel monitoring unit of the railway signal power supply system is high level (e.g., 3V high level), the optocoupler U102 is not conducting, the relay JD2 coil is not energized, and consequently the relay 1KA coil is not energized. The contacts (i.e., pins) 11 and 14 of the relay 1KA are in the open state. At this time, the alarm circuit of this utility model is in the open state, and the buzzer 2HAU does not sound.

[0085] 2. When the railway signal power supply system malfunctions, the alarm logic signal of the original power supply panel monitoring unit of the railway signal power supply system is low (e.g., 0V low level), the optocoupler U102 is turned on, the coil of relay JD2 is energized, and then the coil of relay 1KA is energized. The contacts (i.e., pins) 11 and 14 of relay 1KA are closed. At this time, the alarm circuit of this utility model is in the on state, and the buzzer 2HAU sounds.

[0086] II. In maintenance situations, the selector switch (rotary switch) 4SA is in the "maintenance" position. The circuit principle when the selector switch (rotary switch) 4SA is in the "maintenance" position is described below.

[0087] 1. When the railway signal power supply system malfunctions, the alarm logic signal of the original power supply panel monitoring unit of the railway signal power supply system is low (e.g., 0V low level), the optocoupler U102 is turned on, the coil of relay JD2 is energized, and then the coil of relay 1KA is energized. The contacts (i.e., pins) 11 and 14 of relay 1KA are closed. At this time, the alarm circuit of this utility model is in the open state, and the buzzer 2HAU does not sound.

[0088] 2. When the railway signal power supply system is working normally, the alarm logic signal of the original power supply panel monitoring unit of the railway signal power supply system is at a high level (e.g., a 3V high level). The optocoupler U102 is not conducting, the relay JD2 coil is not energized, and consequently the relay 1KA coil is not energized. The contacts (i.e., pins) 11 and 12 of the relay 1KA are in the ON state. At this time, the alarm circuit of this utility model is in the ON state, and the buzzer 2HAU sounds, reminding the user to adjust the rotary switch 4SA and restore it to the "warning" position.

[0089] Based on the alarm circuit provided by this utility model, this utility model also provides an alarm device for a railway signal power supply system, which includes the alarm circuit as described above.

[0090] In practice, the buzzer 2HAU in the alarm circuit is installed on the instrument panel of the original power supply panel of the railway signal power supply system.

[0091] In practice, the 4SA switch in the alarm circuit is located on the instrument panel of the original power supply panel of the railway signal power supply system.

[0092] In specific implementation, the alarm device of this utility model uses a railway signal power supply system that is a mature, widely used, and operational railway signal power supply system, such as the PK type railway signal power supply system produced by Tianjin Railway Signal Co., Ltd.

[0093] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An alarm circuit, characterized in that, Includes optocoupler U102, transistors Q104~Q105, relay JD2, relay 1KA, changeover switch 4SA, diode D103, and buzzer 2HAU; One end of resistor R107 is connected to alarm logic signal receiver A; The other end of resistor R107 is connected to pin 1 of optocoupler U102 through transistor Q104; Pin 4 of optocoupler U102 is connected to DC power supply DC2, pin 1 of relay JD2, and the cathode of diode D103, respectively. The anode of diode D103 is connected to pin 8 of relay JD2 and pin 3 of transistor Q105, respectively. Pin 3 of optocoupler U102 is connected to one end of resistor R109 and one end of resistor R110, respectively; The other end of resistor R109 is grounded after intersecting with pin 2 of transistor Q105 at the busbar. The other end of resistor R110 is connected to pin 1 of transistor Q105; The switching contacts of relay JD2 are also connected to the coil contacts of relay 1KA; The switching contacts of relay 1KA are connected to buzzer 2HAU via changeover switch 4SA.

2. The alarm circuit as described in claim 1, characterized in that, The fourth switch contact of relay JD2 is connected to the coil contact A1 of relay 1KA. The coil contact A2 of relay 1KA is connected to the neutral terminal N of the second AC power supply AC2; The third switch contact of relay JD2 is connected to the live wire L of the second AC power supply AC2.

3. The alarm circuit as described in claim 2, characterized in that, The 11th switch contact of relay 1KA is connected to the neutral terminal N of the first AC power supply AC1; The 14th switch contact of relay 1KA is connected to the 13th pin of changeover switch 4SA; The 12th switch contact of relay 1KA is connected to the 23rd pin of changeover switch 4SA; After the busbars intersect, pins 14 and 24 of the changeover switch 4SA are connected to pin 2 of the buzzer 2HAU. The first pin of the buzzer 2HAU is connected to the live wire L of the first AC power supply AC1.

4. The alarm circuit as described in claim 3, characterized in that, The live wire L and neutral wire N of the first AC power supply AC1 are connected to the I1 and I2 terminals of the primary side of the isolation transformer T, respectively. Terminals III1 and III2 of the isolation transformer T are used to output the second AC power supply AC2. Terminal Ⅲ1 on the secondary side of the isolation transformer T serves as the live wire L of the second AC power supply AC2 and is connected to the third switch contact of the relay JD2. Terminal Ⅲ2 on the secondary side of the isolation transformer T serves as the neutral terminal N of the second AC power supply AC2 and is connected to the coil contact A2 of the relay 1KA.

5. The alarm circuit as described in claim 1, characterized in that, The other end of resistor R107 is connected to pin 1 of transistor Q104; Pin 3 of transistor Q104 is connected to DC power supply DC1; The second pin of transistor Q104 is connected to the first pin of optocoupler U102; Pin 2 of optocoupler U102 is grounded through resistor R108.

6. The alarm circuit as described in claim 5, characterized in that, DC power supply DC1 is a 5V DC power supply; DC power supply DC2 is a +24V DC power supply.

7. The alarm circuit as described in any one of claims 1 to 6, characterized in that, An indicator light is connected in parallel across the two ends of the buzzer 2HAU.

8. An alarm device for a railway signal power supply system, characterized in that, Includes the alarm circuit as described in any one of claims 1 to 7.

9. The alarm device for a railway signal power supply system as described in claim 8, characterized in that, The buzzer 2HAU in the alarm circuit is installed on the instrument panel of the original power supply panel of the railway signal power supply system.

10. The alarm device for a railway signal power supply system as described in claim 8, characterized in that, The 4SA changeover switch in the alarm circuit is located on the instrument panel of the original power supply panel of the railway signal power supply system.

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