Fire alarm control circuit for rail vehicle, safety loop system, and rail vehicle

Abstract

Embodiments of the present application provide a fire alarm control circuit for a rail vehicle, a safety loop system, and a rail vehicle. When a first network is normal, a fire alarm test signal is output to a fire alarm controller, and the fire alarm controller performs a fire alarm test on the basis of the fire alarm test signal. When a test result of a fire alarm test circuit is normal and a second network is normal, a fire alarm activation circuit is activated, wherein the fire alarm activation circuit comprises a second network module and a fire alarm control relay. When the fire alarm activation circuit is activated, normally open contacts of the fire alarm control relay are closed, and self-locking contacts of a fire alarm relay are powered and self-locked. In this way, testing and activation before fire monitoring are completed, making preparation for a fire alarm system to subsequently enter a working state. Additionally, when a fault occurs in the test of the fire alarm system, a fault condition can be known in a timely manner, and the activation of the system can be suppressed in a timely manner, thereby reducing the impact on other systems affected by fire alarm signals, increasing safety coefficients of rail vehicles, and providing a guarantee for the safe operation of trains.

Description

Rail vehicle fire alarm control circuit, safety loop system and rail vehicle TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit, in particular to a rail vehicle fire alarm control circuit, a safety loop system and a rail vehicle. BACKGROUND

[0002] In the field of rail transit, the fire alarm system has become an essential part of the train. The current train fire alarm system focuses on how to take effective measures to extinguish the fire after the fire occurs, focuses on the in-depth development of the fire alarm system itself, improves the judgment logic, detection accuracy, etc. of the fire alarm equipment, and focuses on the influence of the fire alarm on the related systems such as the train air conditioner and high pressure, and proposes control method optimization related control circuit.

[0003] The existing rail vehicle fire detection and extinguishing control system relates to the field of train fire control, which pre-provides fire detectors at multiple positions in the train, and provides fire extinguishing devices in the train. If more than a preset number of fire alarm signals sent by the fire detectors are received within a preset time, a fire alarm is given to the driver, and the fire extinguishing device is triggered to extinguish the fire in the area of the detector sending the fire alarm signal.

[0004] The existing control method is a common processing method for detecting fire and fire after the occurrence of fire in the current rail vehicle. The detection of fire can be accurately judged by increasing the number of fire detectors, using temperature sensing cable detection in special areas, and optimizing the judgment logic in the detector and fire alarm control host. For fire extinguishing, some trains use on-board fire extinguishers for manual fire extinguishing, and some use fine water mist nozzles or other types of fire extinguishing nozzles to automatically trigger the spraying of fire extinguishing materials to achieve the purpose of fire extinguishing. These means focus on how to layout the train fire alarm equipment and how to quickly solve the fire problem, and do not involve whether the train fire alarm control circuit is safe and reliable.

[0005] SUMMARY

[0006] The rail vehicle fire alarm control circuit, the safety loop system and the rail vehicle provided in the embodiments of the present application solve the problem that the existing control system generally performs protective actions for the train after the occurrence of fire, and does not confirm whether the fire alarm control circuit itself is reliable.

[0007] In order to achieve the above purpose, the present application provides the following technical solutions:

[0008] A rail vehicle fire alarm control circuit, comprising:

[0009] A fire alarm controller is connected with a fire alarm detection device and a TCMS, an internal normally closed contact of the fire alarm controller is connected in series with a self-holding contact of a fire alarm alarm relay of the fire alarm detection device, and the fire alarm alarm relay is controlled to be powered or unpowered according to a fire occurrence condition;

[0010] A fire alarm test circuit is used to output a fire alarm test signal to the fire alarm controller when a first network is normal, and the fire alarm controller performs a fire alarm test according to the fire alarm test signal;

[0011] A fire alarm starting circuit is used to start when a test result of the fire alarm test circuit is normal and a second network is normal, and the fire alarm test circuit and the fire alarm starting circuit are connected in parallel; the fire alarm starting circuit comprises a second network module and a fire alarm control relay, a normally open contact of the fire alarm control relay is connected in parallel with a self-holding contact of the fire alarm alarm relay, when the fire alarm starting circuit starts, the normally open contact of the fire alarm control relay is closed, and the self-holding contact of the fire alarm alarm relay is powered to be self-holding.

[0012] Optionally, the fire alarm test circuit comprises a first network module and a fire alarm test relay, and a normally open contact of the fire alarm test relay is connected with the fire alarm controller;

[0013] An input end of the first network module is connected with a positive pole of a direct current power supply, an output end of the first network module is connected with an input end of a contact coil of the fire alarm test relay, and an output end of the contact coil of the fire alarm test relay is connected with a negative pole of the direct current power supply;

[0014] When the first train network is normal, the first network module is powered to be closed, the fire alarm test relay is powered and the normally open contact is closed, and the fire alarm test signal is sent to the fire alarm controller.

[0015] Optionally, an input end of the second network module is connected with the positive pole of the direct current power supply, an output end of the second network module is connected with an input end of a contact coil of the fire alarm control relay, and an output end of the contact coil of the fire alarm control relay is connected with the negative pole of the direct current power supply;

[0016] An input end of a contact coil of the fire alarm alarm relay is connected with the normally closed contact inside the fire alarm controller through the self-holding contact of the fire alarm alarm relay, and an output end of the contact coil of the fire alarm alarm relay is connected with the negative pole of the direct current power supply;

[0017] And / or, the fire alarm control relay is a time relay.

[0018] Optionally, an audible and light alarm control circuit is further included, comprising a lamp group circuit and a buzzer group circuit connected in parallel;

[0019] The first contact of the fire alarm relay is connected in series with the lamp group circuit, and the second contact of the fire alarm relay is connected in series with the buzzer group circuit.

[0020] The fire alarm controller is configured to control the internal normally closed contact of the fire alarm controller to open, the self-holding contact of the fire alarm relay to lose power and open, and the first contact and the second contact of the fire alarm relay to be powered and closed, respectively, when a fire is detected, so that the lamp group circuit and the buzzer group circuit are closed to alarm.

[0021] Optionally, the sound and light alarm control circuit further comprises a fire alarm bypass control circuit connected in parallel with the lamp group circuit and the buzzer group circuit.

[0022] The fire alarm bypass control circuit comprises a fire alarm bypass control relay and a fire alarm bypass switch connected in series, and the first contact and the second contact of the fire alarm bypass control relay are connected in series with the lamp group circuit and the buzzer group circuit, respectively.

[0023] The fire alarm bypass switch is controlled to close when a false alarm of fire occurs, the fire alarm bypass control relay is powered, the first contact and the second contact of the fire alarm bypass control relay are switched from the closed state to the open state, and the lamp group circuit and the buzzer group circuit are opened.

[0024] Optionally, the fire alarm bypass switch is connected to the positive pole of the DC power supply, and the contact coil of the fire alarm bypass control relay is connected to the negative pole of the DC power supply.

[0025] Optionally, the fire alarm test circuit further comprises a first manual button for manually controlling the fire alarm test relay, the input end of the first manual button is connected in parallel with the first network module, and the output end of the first manual button is connected in series with the input end of the contact coil of the fire alarm test relay.

[0026] Optionally, the fire alarm test circuit further comprises a first manual button for manually controlling the fire alarm test relay, the input end of the first manual button is connected in parallel with the first network module, and the output end of the first manual button is connected in series with the input end of the contact coil of the fire alarm test relay.

[0027] The application also provides a safety loop system for a rail vehicle, wherein the rail vehicle has a plurality of carriages, and the safety loop system comprises:

[0028] The rail vehicle fire alarm control circuit according to any one of the above embodiments is located in the carriage.

[0029] a first switch located in the car and connected in series with the corresponding rail vehicle fire control circuit, the first switches of all the cars being connected in series, the first switch being used for turning on and off the train safety loop;

[0030] a whole-car fire control relay located in the one-end car and the two-end car respectively, the whole-car fire control relay being used for controlling the train braking when the train safety loop loses power;

[0031] When a fire occurs in one of the cars, the first switch of the corresponding car is turned off, the train safety loop is turned off, and the whole-car fire control relay loses power to control the train braking.

[0032] Optionally, the system further comprises:

[0033] a second switch located in the one-end car and the two-end car respectively, an input end of the second switch being connected with the positive pole of the DC power supply, an output end of the second switch being connected in series with an input end of the whole-car fire control relay, and an output end of the whole-car fire control relay being connected with the negative pole of the DC power supply;

[0034] The rail vehicle fire control circuit is connected with the input end of the whole-car fire control relay, and the second switch is used for being turned off when the current car is used as the occupied end.

[0035] Optionally, the system further comprises a fire loop bypass switch arranged in at least one car.

[0036] The fire loop bypass switch has a bypass position, and when the train safety loop is turned on, the bypass position of the fire loop bypass switch is in an off state.

[0037] When the train safety loop is turned off, the bypass position of the fire loop bypass switch of one of the cars is switched to a closed state, and the fire loop bypass switch of the current car turns on the positive pole of the DC power supply of the train safety loop, the whole-car fire control relay and the negative pole of the DC power supply to form a local safety loop.

[0038] Optionally, the first switch is the third contact of the fire alarm relay of the rail vehicle fire control circuit.

[0039] The application also provides a rail vehicle comprising a plurality of cars and the safety loop system according to any one of the above embodiments.

[0040] Optionally, the one-end car and the two-end car of the rail vehicle are respectively provided with the first switch and the whole-car fire control relay in the safety loop system.

[0041] Optionally, the second switch of the safety loop system is arranged in each of the cars.

[0042] Optionally, the rail vehicle comprises a motor train unit or a railway vehicle towed by a locomotive.

[0043] The rail vehicle fire alarm control circuit provided in the embodiment of the present application comprises: a fire alarm controller connected with a fire alarm detection device and a TCMS respectively, a normally closed contact inside the fire alarm controller connected in series with a self-locking contact of a fire alarm alarm relay of the fire alarm detection device, used for controlling the on-off state of the fire alarm alarm relay according to the fire occurrence condition; a fire alarm test circuit used for outputting a fire alarm test signal to the fire alarm controller when a first network is normal, the fire alarm controller performing fire alarm test according to the fire alarm test signal; a fire alarm starting circuit used for starting when the test result of the fire alarm test circuit is normal and a second network is normal, the fire alarm test circuit and the fire alarm starting circuit being connected in parallel; the fire alarm starting circuit comprising a second network module and a fire alarm control relay, a normally open contact of the fire alarm control relay connected in parallel with the self-locking contact of the fire alarm alarm relay, when the fire alarm starting circuit starts, the normally open contact of the fire alarm control relay is closed, and the self-locking contact of the fire alarm alarm relay is powered to be self-locked.

[0044] Compared with the prior art, the rail vehicle fire alarm control circuit, the safety loop system and the rail vehicle provided in the embodiment of the present application have the following technical effects:

[0045] The rail vehicle fire alarm control circuit comprises a fire alarm controller, a fire alarm test circuit and a fire alarm starting circuit, the fire alarm test circuit outputs a fire alarm test signal to the fire alarm controller when a first network is normal, the fire alarm controller performs fire alarm test according to the fire alarm test signal; the fire alarm starting circuit starts when the test result of the fire alarm test circuit is normal and a second network is normal, the fire alarm starting circuit comprises a second network module and a fire alarm control relay, and a normally open contact of the fire alarm control relay is connected in parallel with a self-locking contact of a fire alarm alarm relay, a normally closed contact inside the fire alarm controller is connected in series with the self-locking contact of the fire alarm alarm relay of the fire alarm detection device, used for controlling the on-off state of the fire alarm alarm relay according to the fire occurrence condition; when the fire alarm starting circuit starts, the normally open contact of the fire alarm control relay is closed, and the self-locking contact of the fire alarm alarm relay is powered to be self-locked; thus, the test before fire disaster monitoring and the starting are completed, the working state of the subsequent fire alarm system is prepared, when the fire alarm system test fails, the failure condition can be known in time, the system starting can be inhibited in time, the influence on other systems affected by the fire alarm signal is reduced, the safety coefficient of the rail vehicle is improved, and the safe operation of the train is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not limit the present application in any manner. In the drawings:

[0047] Fig. 1 is a structural block diagram of a fire alarm system according to an embodiment of the present application;

[0048] Fig. 2 is a circuit schematic diagram of a rail vehicle fire alarm control circuit according to an embodiment of the present application;

[0049] Fig. 3 is a circuit schematic diagram of an audible and visual alarm circuit according to an embodiment of the present application;

[0050] Fig. 4 is a circuit schematic diagram of a safety loop system according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] The embodiments of the present application disclose a rail vehicle fire alarm control circuit, a safety loop system and a rail vehicle, to solve the problem that the existing control system is generally a protective action of the train after a fire occurs, and does not confirm whether the fire alarm control circuit itself is reliable.

[0052] In order to make the technical solutions and advantages of the embodiments of the present application clearer, the following further describes exemplary embodiments of the present application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0053] Please refer to Figs. 1-4, Fig. 1 is a structural block diagram of a fire alarm system according to an embodiment of the present application; Fig. 2 is a circuit schematic diagram of a rail vehicle fire alarm control circuit according to an embodiment of the present application; Fig. 3 is a circuit schematic diagram of an audible and visual alarm circuit according to an embodiment of the present application; and Fig. 4 is a circuit schematic diagram of a safety loop system according to an embodiment of the present application.

[0054] It can be understood that, at present, the fire alarm system of many rail trains is powered on as long as the train is powered on, the fire alarm system device is powered on, and after the self-checking of the device is completed, the entire fire alarm system enters a working state. This method is relatively direct, when some problems occur in the fire alarm system, the fault condition cannot be known as soon as possible, and the start of the system cannot be effectively controlled, thereby affecting the functions of other subsystems affected by the fire alarm signal.

[0055] In order to solve the above technical problem, the present application provides a rail vehicle fire alarm control circuit, as shown in Fig. 2, comprising:

[0056] A fire alarm controller connected with a fire alarm detection device and a TCMS, a normally closed contact in the fire alarm controller is connected in series with a self-locking contact of a fire alarm alarm relay of the fire alarm detection device, for controlling the power-on and power-off state of the fire alarm alarm relay according to a fire occurrence condition;

[0057] The fire alarm test circuit is used to output a fire alarm test signal to the fire alarm controller when the first network is normal, and the fire alarm controller performs a fire alarm test according to the fire alarm test signal.

[0058] The fire alarm starting circuit is used to start when the test result of the fire alarm test circuit is normal and the second network is normal, and the fire alarm test circuit and the fire alarm starting circuit are connected in parallel.

[0059] The fire alarm starting circuit includes a second network module and a fire alarm control relay K2, and the normally open contact K2-1 of the fire alarm control relay K2 is connected in parallel with the self-locking contact of the fire alarm alarm relay. When the fire alarm starting circuit starts, the normally open contact of the fire alarm control relay is closed, and the self-locking contact of the fire alarm alarm relay is powered to be self-locked.

[0060] In a specific embodiment, the rail vehicle fire alarm control circuit of the present application is applied to a rail car, which includes a fire alarm controller, a fire alarm test circuit and a fire alarm starting circuit. As shown in FIG. 1, each car is respectively provided with a fire alarm controller, which is connected with the fire alarm controllers of other cars through a bus such as CAN or RS485, provides power supply for a fire alarm detection device, receives information from the fire alarm detection device, monitors system faults, communicates with a train network control system TCMS through an interface such as MVB / Ethernet, and the network system can transmit data to a driver station or ground for relevant personnel to view and handle.

[0061] The fire alarm detection device includes a fire alarm detector and a temperature sensing cable, which are arranged according to the requirements of the car and can be generally arranged in areas such as a passenger room, an electrical cabinet and a bathroom, are used to detect smoke and high temperature, and return the detection information to the fire alarm controller through a signal; the temperature sensing cable is generally installed in a box body through which a large current such as a traction converter and an auxiliary converter passes, the temperature of the box body changes after rising, and the detection information is transmitted to the fire alarm controller.

[0062] The fire alarm control circuit is tested before the fire alarm system starts to enter a monitoring state, and the test can be a manual test or an automatic test. Specifically, after the train is powered on, it is determined whether the first network is normal. If yes, the first network outputs a fire alarm test signal to drive the fire alarm controller to perform a fire alarm test. When the test result of the fire alarm test circuit is normal, the fire alarm starting circuit is allowed to start. When the test result of the fire alarm test circuit affects the system start, the fire alarm controller uploads the test fault condition to the TCMS, and the fire alarm starting circuit is not allowed to start.

[0063] When the test result allows the fire alarm to start, the fire alarm controller, fire alarm detector, temperature sensing cable and other devices enter a ready-to-work state, and start monitoring the fire in the carriage; at the same time, the second network module judges whether the second network can normally drive the fire alarm control relay, if so, the normally open contact of the fire alarm control relay is closed, the self-locking contact of the fire alarm alarm relay is powered and self-locked, the self-locking contact of the fire alarm alarm relay and the internal normally closed contact of the fire alarm controller are connected in series, and the fire alarm controller controls the power-on and power-off state of the fire alarm alarm relay according to the fire occurrence situation; specifically, when a fire is detected on a certain road, the corresponding internal normally closed contact is opened, the self-locking contact of the fire alarm alarm relay is powered off and closed, and the other contacts of the fire alarm alarm relay in the sound and light alarm circuit are opened to alarm.

[0064] The fire alarm alarm relay can include one or more of a PIS cabinet alarm relay, an air conditioning cabinet alarm relay and a converter alarm relay, and each alarm relay is connected to the corresponding internal normally closed contact of the fire alarm controller through the corresponding self-locking contact.

[0065] Compared with the prior art, the rail vehicle fire alarm control circuit, the safety loop system and the rail vehicle provided in the embodiments of the present application have the following technical effects:

[0066] The rail vehicle fire alarm control circuit includes a fire alarm controller, a fire alarm test circuit and a fire alarm start circuit, the fire alarm test signal is output to the fire alarm controller when the first network is normal, and the fire alarm controller performs fire alarm test according to the fire alarm test signal; when the test result of the fire alarm test circuit is normal and the second network is normal, the fire alarm start circuit is started, the fire alarm start circuit includes a second network module and a fire alarm control relay, the normally open contact of the fire alarm control relay is connected in parallel with the self-locking contact of the fire alarm alarm relay, the internal normally closed contact of the fire alarm controller is connected in series with the self-locking contact of the fire alarm alarm relay of the fire alarm detection device, and is used to control the power-on and power-off state of the fire alarm alarm relay according to the fire occurrence situation; when the fire alarm start circuit is started, the normally open contact of the fire alarm control relay is closed, and the self-locking contact of the fire alarm alarm relay is powered and self-locked; in this way, the test before fire monitoring and the start are completed, preparation for the subsequent working state of the fire alarm system is made, at the same time, when the fire alarm system test fails, the failure condition can be known in time, and the system start can be inhibited in time, the influence on other systems affected by the fire alarm signal is reduced, the safety factor of the rail vehicle is improved, and the safety of train operation is ensured.

[0067] In an optional embodiment, the fire alarm test circuit includes a first network module and a fire alarm test relay, and the normally open contact of the fire alarm test relay is connected to the fire alarm controller;

[0068] The input end of the first network module is connected with the positive pole of the direct current power supply, the output end of the first network module is connected with the input end of the contact coil of the fire alarm test relay, and the output end of the contact coil of the fire alarm test relay is connected with the negative pole of the direct current power supply.

[0069] When the first train network is normal after the train is powered on, the first network module is powered on to close and drive the fire alarm test relay to be powered on and the normally open contact to be closed, and a fire alarm test signal is sent to the fire alarm controller.

[0070] In another optional embodiment, the input end of the second network module is connected with the positive pole of the direct current power supply, the output end of the second network module is connected with the input end of the contact coil of the fire alarm control relay, and the output end of the contact coil of the fire alarm control relay is connected with the negative pole of the direct current power supply.

[0071] The input end of the contact coil of the fire alarm alarm relay is connected with the normally closed contact inside the fire alarm controller through the self-locking contact of the fire alarm alarm relay, and the output end of the contact coil of the fire alarm alarm relay is connected with the negative pole of the direct current power supply.

[0072] When the test result allows the fire alarm system to start, it is judged whether the second network is normal, if yes, the second network module is closed, the normally open contact of the fire alarm control relay is closed, the fire alarm controller and the fire alarm control relay jointly control the action state of each fire alarm alarm relay, and then control the related subsystem circuit.

[0073] In this embodiment, when the first network module or the second network module cannot connect the network, the corresponding manual button can be driven.

[0074] Specifically, the fire alarm test circuit further comprises a first manual button, the input end of the first manual button is connected with the first network module in parallel, and the output end of the first manual button is connected with the input end of the contact coil of the fire alarm test relay in series.

[0075] And / or, the fire alarm starting circuit further comprises a second manual button, the input end of the second manual button is connected with the second network module in parallel, and the output end of the second manual button is connected with the input end of the contact coil of the fire alarm control relay in series.

[0076] The specific circuit diagram of the fire alarm test circuit and the fire alarm starting circuit is shown in FIG. 2. One end of the fire alarm controller FC1 is connected with the TCMS through a network interface, and the other end is connected with the self-locking contact of the fire alarm alarm relay of the fire alarm detection device through an internal normally closed contact. The fire alarm alarm relay includes the PIS cabinet alarm relay K3, the air conditioning cabinet alarm relay K4, and the converter alarm relay K5. One end of the self-locking contact K3-1 of the PIS cabinet alarm relay K3 is connected with the internal normally closed contact of the fire alarm controller, and the other end is connected with the A1 end of the contact coil of the PIS cabinet alarm relay K3. The A2 end of the contact coil of the PIS cabinet alarm relay K3 is connected with the negative pole of the DC power supply. Similarly, one end of the self-locking contact K4-1 of the air conditioning cabinet alarm relay K4 is connected with the internal normally closed contact of the fire alarm controller FC1, and the other end is connected with the A1 end of the contact coil of the air conditioning cabinet alarm relay K4. The A2 end of the contact coil of the air conditioning cabinet alarm relay K4 is connected with the negative pole of the DC power supply. One end of the self-locking contact K5-1 of the converter alarm relay K5 is connected with the internal normally closed contact of the fire alarm controller FC1, and the other end is connected with the A1 end of the contact coil of the converter alarm relay K5. The A2 end of the contact coil of the converter alarm relay K5 is connected with the negative pole of the DC power supply.

[0077] The first network module N1 is a normally open switch. The input end of the first network module N1 is connected with the positive pole of the DC power supply. The output end of the first network module N1 is connected with the input end A1 of the contact coil of the fire alarm test relay K1. The output end A2 of the contact coil of the fire alarm test relay K1 is connected with the negative pole of the DC power supply. The normally open contact K1-1 of the fire alarm test relay K1 is connected with the internal normally closed contact of the fire alarm controller FC1. The input end of the first manual button S1 is connected in parallel with the first network module N1. The output end of the first manual button S1 is connected in series with the input end A1 of the contact coil of the fire alarm test relay.

[0078] The second network module N2 is also a normally open switch. The input end of the second network module N2 is connected with the positive pole of the DC power supply. The output end of the second network module N2 is connected with the input end A1 of the contact coil of the fire alarm control relay K2. The output end A2 of the contact coil of the fire alarm control relay K2 is connected with the negative pole of the DC power supply. The normally open contact K2-1 of the fire alarm control relay K2 is connected in parallel with the self-locking contact K3-1 of the PIS cabinet alarm relay K3. The normally open contact K2-2 of the fire alarm control relay K2 is connected in parallel with the self-locking contact K4-1 of the air conditioning cabinet alarm relay K4. The normally open contact K2-3 of the fire alarm control relay K2 is connected in parallel with the self-locking contact K5-1 of the converter alarm relay K5.

[0079] Taking a certain car as an example, it is assumed that the PIS cabinet and the air conditioning cabinet area of the car are installed with detectors, and the converter area is installed with a temperature sensing cable. After the train is powered on, the control circuit is connected with the DC 110V DC.

[0080] The specific process of the fire alarm test is as follows: after the train is powered on, when the first train network is normal, the first network module N1 outputs a fire alarm test signal to drive the fire alarm test relay K1 to be powered on, the normally open contact K1-1 is turned on, and the fire alarm controller performs the fire alarm test: when the network is abnormal, the button S1 is manually closed to make K1 powered on and K1-1 turned on, and the fire alarm test starts. If the test result affects the start of the fire alarm system, the test fault condition is uploaded, and the fire alarm system is not allowed to start; otherwise, the fire alarm system is allowed to start.

[0081] The test result is uploaded to the TCMS through the network interface, and when the test result allows the fire alarm to start, the fire alarm system device starts to work and monitors the fire alarm condition of each area. The specific process of the fire alarm start is as follows: after the fire alarm system starts, when the second network is normal, the second network module N2 is closed to drive the fire alarm control relay K2 to be powered on, the normally open contacts K2-1, K2-2 and K2-3 are closed to make the self-locking contacts K3-1, K4-1 and K5-1 powered on and self-locked, and in the closed state. Preferably, the fire alarm control relay K2 is a time relay, and the auxiliary contacts K2-1, K2-2 and K2-3 of the time relay K2 are turned on for 2 seconds and then turned off. The purpose of turning on for 2 seconds is to make the area alarm relays K3, K4 and K5 self-locked through the corresponding self-locking contacts K3-1, K4-1 and K5-1 (when the PIS cabinet detector, the air conditioner cabinet detector and the temperature cable of the converter are not detected abnormally, the corresponding area contact in the fire alarm controller is in the closed state, the area alarm relays K3, K4 and K5 are powered on through the K2 auxiliary contact, and then self-locked).

[0082] In an alternative embodiment, the above-mentioned fire alarm control circuit further comprises an audible and visual alarm control circuit, including a lamp group circuit and a buzzer group circuit in parallel;

[0083] The first contact of the fire alarm alarm relay is connected in series with the lamp group circuit, and the second contact of the fire alarm alarm relay is connected in series with the buzzer group circuit;

[0084] The fire alarm controller is used to control the internal normally closed contact of the fire alarm controller to be disconnected when a fire is detected, the self-locking contact of the fire alarm alarm relay to be powered off and disconnected, and the first contact and the second contact of the fire alarm alarm relay to be powered on and closed, respectively, so that the lamp group circuit and the buzzer group circuit are closed to alarm.

[0085] As shown in Fig. 3, the fire alarm relay in the above embodiment is a centralized fire alarm relay, and its circuit connection mode is the same as that of the fire alarm relay; it can be understood that when there is no fire, the fire alarm relay K6 reaches a self-locking state through the normally open contact K2-4 of the fire alarm control relay K2, when the K6 is powered, the K6-1 is in a closed state, the first contact K6-2 and the second contact K6-3 of the fire alarm relay are disconnected, the lamp group circuit and the buzzer group circuit cannot be powered, the alarm lamp is off, and the buzzer does not emit a sound. When the fire controller FC1 detects that there is a fire in any area, the normally closed contact in the fire controller FC1 is disconnected, the self-locking contact K6-1 is powered off and disconnected, the fire alarm relay K6 is powered off, the first contact K6-1 and the second contact K6-2 are closed, the alarm lamp is on, and the buzzer emits a sound to prompt relevant personnel that there is a fire.

[0086] The lamp group circuit includes a plurality of alarm lamps connected in parallel, and each alarm lamp is connected in series with the first contact of the fire alarm relay K6 after being connected in parallel, and each alarm lamp can be arranged at different positions, such as corresponding detection areas (PIS cabinet detector, air conditioning cabinet detector, and converter temperature cable), a car end wall, a driver's desk, and a ground monitoring room; when a fire occurs, each alarm lamp is powered to alarm, so as to timely remind staff of the current fire and improve the safety factor of the train.

[0087] Correspondingly, the buzzer group circuit includes a plurality of buzzers connected in parallel, and each buzzer is connected in series with the second contact of the fire alarm relay K6 after being connected in parallel, and the arrangement position of each buzzer can be arranged according to the arrangement position of the alarm lamp described above, which will not be described herein.

[0088] Optionally, the audible and visual alarm control circuit further includes a fire bypass control circuit, and the fire bypass control circuit is connected in parallel with the lamp group circuit and the buzzer group circuit.

[0089] The fire bypass control circuit includes a fire bypass control relay and a fire bypass switch connected in series, and the first contact and the second contact of the fire bypass control relay are connected in series with the lamp group circuit and the buzzer group circuit respectively; wherein the fire bypass switch is connected with the positive pole of the direct current power supply, and the contact coil of the fire bypass control relay is connected with the negative pole of the direct current power supply.

[0090] When a false alarm of a fire occurs, the fire bypass switch is manually controlled to be closed, the fire bypass control relay is powered, the first contact and the second contact of the fire bypass control relay are changed from a closed state to a disconnected state, the lamp group circuit and the buzzer group circuit are disconnected, the alarm lamp is not on, and the buzzer does not emit a sound.

[0091] As shown in Fig. 3, the specific circuit connection relationship of the sound-light alarm control circuit is as follows: the self-holding contact K6-1 of the centralized fire alarm relay K6 is connected with the internal normally closed contact of the fire alarm controller FC1, and the normally open contact K2-4 of the fire alarm control relay K2 is connected in parallel across the self-holding contact K6-1; the lamp group circuit comprises the first contact K7-1 of the fire alarm bypass control relay K7, the first contact K6-2 of the fire alarm alarm relay, and a plurality of parallel-connected alarm lamps LN1#-LN# arranged in sequence; the buzzer group circuit comprises the second contact K7-2 of the fire alarm bypass control relay K7, the second contact K6-3 of the fire alarm alarm relay, and a plurality of parallel-connected buzzers HN1-HN# arranged in sequence; the fire alarm bypass control circuit comprises the fire alarm bypass switch button S3 and the fire alarm bypass control relay K7.

[0092] When a fire occurs, the internal normally closed contact of the fire alarm controller FC1 is disconnected, the self-holding contact K6-1 of the centralized fire alarm relay K6 is de-energized and disconnected, the first contact K6-1 and the second contact K6-2 are closed, the first contact K7-1 of the fire alarm bypass control relay K7 and the second contact K7-2 of the fire alarm bypass control relay K7 are normally closed contacts, the alarm lamp is lit, and the buzzer emits a sound, prompting relevant personnel that a fire has occurred, so as to facilitate the passengers and the driver and crew to take corresponding measures.

[0093] If it is judged that it is a false alarm of the fire alarm system, the alarm lamp can be manually turned off and the buzzer can no longer emit a sound. Specifically, when a false alarm of a fire occurs, the fire alarm bypass switch button S3 is manually controlled to be closed, the fire alarm bypass control relay K7 is energized, the first contact K7-1 and the second contact K7-2 of the fire alarm bypass control relay are switched from the closed state to the disconnected state, the lamp group circuit and the buzzer group circuit are disconnected, the alarm lamp is not lit, and the buzzer does not emit a sound.

[0094] Based on the rail vehicle fire alarm control circuit provided in the above embodiments, the application further provides a safety loop system, as shown in Fig. 4, which comprises:

[0095] The rail vehicle fire alarm control circuit of any one of the above embodiments is located in a car;

[0096] The first switch is located in the car and is connected in series with the corresponding rail vehicle fire alarm control circuit, and the first switches of all cars are connected in series, and the first switch is used to turn on and off the train safety loop;

[0097] The whole train fire alarm control relay is located in the one-end car and the two-end car, respectively, and is used to control the train braking when the train safety loop is de-energized;

[0098] When a fire occurs in one of the cars, the first switch of the corresponding car is disconnected, the train safety loop is disconnected, and the whole train fire alarm control relay is de-energized to control the train braking.

[0099] Any car is provided with a rail vehicle fire alarm control circuit and a first switch, when any car finds a fire, the first switch of the corresponding car is turned off, the train safety loop is disconnected, the whole train fire alarm control relay of the one-end car and the two-end car loses power, and the train is controlled to brake.

[0100] The first switch can be a contact of a relay, or be configured as a switch, a button or the like according to needs. Preferably, the first switch is a third contact of a fire alarm relay of the rail vehicle fire alarm control circuit; when there is no fire in the train, the fire alarm relay K6 of all cars is powered, and the contact K6-4 is in a closed state; when any car has a fire, the fire alarm relay K6 of the corresponding car loses power, the contact K6-4 of the corresponding car is disconnected, the loop is disconnected, the whole train fire alarm control relay of the one-end car and the two-end car loses power, and the train is controlled to brake; thus the safety of the train is improved.

[0101] In another embodiment, the safety loop system further comprises a second switch in the one-end car and the two-end car respectively, a first end of the second switch is connected with a positive pole of a direct current power supply, a second end of the second switch is connected with a first end of the whole train fire alarm control relay, a second end of the whole train fire alarm control relay is connected with a negative pole of the direct current power supply; the rail vehicle fire alarm control circuit is connected in series with the first end of the whole train fire alarm control relay, and the second switch is used to disconnect when the current car is as an occupied end.

[0102] When the one-end car is as a head car and is occupied, the second switch of the one-end car is disconnected, and the second switch of the two-end car is connected, the current can only pass through the first switch of each car from the one-end car, and then pass through the second switch of the two-end car, so that the whole train fire alarm control relay of the one-end car and the two-end car is powered, indicating that the whole train is in a fire-free state, and the train will not take corresponding braking measures.

[0103] Optionally, the second switch is specifically an auxiliary contact of an occupied relay, and the second switch of the one-end car and the second switch of the two-end car are self-locked with each other, when one of the second switches is disconnected, the other second switch is connected.

[0104] Further, in order to improve the safety of the train, the safety loop system further comprises a fire alarm loop bypass switch arranged in at least one of the plurality of cars.

[0105] The fire alarm loop bypass switch has a bypass position, when the train safety loop is conducted, the bypass position of the fire alarm loop bypass switch is in a disconnected state.

[0106] When the train safety loop is disconnected, the bypass position of the fire alarm loop bypass switch of one of the cars is switched to the closed state, and the fire alarm loop bypass switch of the current car conducts the positive pole of the DC power supply of the train safety loop, the whole train fire alarm control relay and the negative pole of the DC power supply, forming a local safety loop.

[0107] As shown in Figure 4, it is a specific circuit diagram of the safety loop system. The second switch K9-1 and the whole train fire alarm control relay K8 are arranged in the one-end car and the two-end car respectively. The input end of the second switch K9-1 is connected with the positive pole of the DC power supply, the output end of the second switch K9-1 is connected with the contact coil A1 end of the whole train fire alarm control relay K8, the contact coil A2 end of the whole train fire alarm control relay K8 is connected with the negative pole of the DC power supply, the input end of the first switch K6-4 is connected with the positive pole of the DC power supply, and the output end of the first switch K6-4 is connected with the input end of the whole train fire alarm control relay in series. The rail vehicle fire alarm control circuit, the first switch K6-4 and the fire alarm loop bypass switch S4 are arranged in each car respectively.

[0108] The specific working process of the safety loop system includes: taking the one-end car as an example, when there is no fire in each car, the fire alarm relay K6 of all cars is powered, the contact K6-4 is in the closed state, the train safety loop is conducted, and the fire alarm loop bypass switch S4 is in the bypass position at this time. The whole train fire alarm control relay K8 of the one-end car and the two-end car is powered, and the train is in a non-braking state. When there is a fire in any car, the internal normally closed contact of the fire alarm controller FC1 of the car is opened, the self-locking contact K6-1 of the fire alarm relay is de-energized, the first switch K6-4 is de-energized and opened, the train safety loop is disconnected, the whole train fire alarm control relay K8 of the one-end car and the two-end car is de-energized, and the train takes braking measures.

[0109] In special cases, the train needs to be forcibly started after human judgment. The fire alarm loop fault switch S4 is operated so that the current no longer passes through the fire alarm loop circuit of each car and directly passes through the fire alarm loop fault switch S4, so that the whole train fire alarm control relay K8 is powered and the braking measures are forcibly cancelled.

[0110] The above safety loop system can timely know the fault condition when the rail vehicle fire alarm control circuit appears special condition, and inhibit the system start, thereby reducing the influence on other subsystems related to the fire alarm signal. The safety loop system fully considers the control requirements of the train fire alarm system itself, covers the fire alarm system test and start circuit, the sound and light alarm control circuit and the safety loop control circuit, the control design is comprehensive, fully considers the fire alarm control circuit logic, improves the safety factor of the train, the control circuit design is simple and clear, realizes the fire alarm system control logic, and fills the blank of the current rail train fire alarm system control circuit design.

[0111] The application also provides a rail vehicle comprising the safety loop system of any of the above embodiments and a plurality of carriages. Since the rail vehicle adopts the safety loop system of the above embodiments, the beneficial effects of the rail vehicle refer to the above embodiments.

[0112] In an alternative embodiment, the first switch and the whole train fire control relay in the safety loop system are respectively arranged in the one-end carriage and the two-end carriage of the rail vehicle.

[0113] In an alternative embodiment, the second switch of the safety loop system is arranged in each of the carriages.

[0114] In an alternative embodiment, the rail vehicle comprises a motor train unit or a railway vehicle towed by a locomotive.

[0115] In the description of the present application, it should be understood that the terms "front", "rear", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0116] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0117] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and the like should be understood broadly; for example, connection can be direct connection or indirect connection through an intermediate medium, or internal connection of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0118] Although some alternative embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including some alternative embodiments and all changes and modifications falling within the scope of the present application.

[0119] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A rail vehicle fire control circuit, characterized in that, The application relates to a fire alarm control system, which comprises the following parts: a fire alarm controller connected with a fire alarm detecting device and a TCMS, respectively, wherein the internal normally closed contact of the fire alarm controller is connected with the self-locking contact of a fire alarm alarm relay of the fire alarm detecting device in series, and the on-off state of the fire alarm alarm relay is controlled according to the fire occurrence condition; a fire alarm test circuit for outputting a fire alarm test signal to the fire alarm controller when the first network is normal, and the fire alarm controller carries out fire alarm test according to the fire alarm test signal; a fire alarm starting circuit for starting when the test result of the fire alarm test circuit is normal and the second network is normal, wherein the fire alarm test circuit and the fire alarm starting circuit are connected in parallel, the fire alarm starting circuit comprises a second network module and a fire alarm control relay, the normally open contact of the fire alarm control relay is connected with the self-locking contact of the fire alarm alarm relay in parallel, when the fire alarm starting circuit starts, the normally open contact of the fire alarm control relay is closed, and the self-locking contact of the fire alarm alarm relay is electrified and self-locked.

2. A rail vehicle fire control circuit according to claim 1, characterised in that, The fire alarm test circuit comprises a first network module and a fire alarm test relay, and the normally open contact of the fire alarm test relay is connected with the fire alarm controller; the input end of the first network module is connected with the positive pole of a direct current power supply, the output end of the first network module is connected with the input end of the contact coil of the fire alarm test relay, and the output end of the contact coil of the fire alarm test relay is connected with the negative pole of the direct current power supply; when the first train network is normal, the first network module is electrified and closed, the fire alarm test relay is electrified and the normally open contact is closed, and the fire alarm test signal is sent to the fire alarm controller.

3. The rail vehicle fire control circuit of claim 1, wherein, the input end of the second network module is connected with the positive pole of the direct current power supply, the output end of the second network module is connected with the input end of the contact coil of the fire alarm control relay, and the output end of the contact coil of the fire alarm control relay is connected with the negative pole of the direct current power supply; the input end of the contact coil of the fire alarm alarm relay is connected with the internal normally closed contact of the fire alarm controller through the self-locking contact of the fire alarm alarm relay, and the output end of the contact coil of the fire alarm alarm relay is connected with the negative pole of the direct current power supply; and / or, the fire alarm control relay is a time relay. The application further comprises an audible and visual alarm control circuit, which comprises a lamp group circuit and a buzzer group circuit connected in parallel; 4. The rail vehicle fire control circuit of claim 1, wherein, the first contact of the fire alarm alarm relay is connected with the lamp group circuit in series, and the second contact of the fire alarm alarm relay is connected with the buzzer group circuit in series; the fire alarm controller is used for controlling the internal normally closed contact of the fire alarm controller to be disconnected, the self-locking contact of the fire alarm alarm relay to be de-energized and disconnected, and the first contact and the second contact of the fire alarm alarm relay to be respectively electrified and closed when the fire occurrence is monitored, so that the lamp group circuit and the buzzer group circuit are closed to alarm. The audible and visual alarm control circuit further comprises a fire alarm bypass control circuit, and the fire alarm bypass control circuit is connected with the lamp group circuit and the buzzer group circuit in parallel; 5. A rail vehicle fire control circuit according to claim 4, characterised in that, ​ The fire alarm bypass control circuit comprises a fire alarm bypass control relay and a fire alarm bypass switch in series, the first and second contacts of the fire alarm bypass control relay are connected with the lamp group circuit and the buzzer group circuit in series respectively; When the fire alarm is misreported, the fire alarm bypass switch is controlled to be closed, the fire alarm bypass control relay is powered, and the first and second contacts of the fire alarm bypass control relay are switched from the closed state to the open state, and the lamp group circuit and the buzzer group circuit are disconnected.

6. A rail vehicle fire control circuit according to claim 5, characterised in that, The fire alarm bypass switch is connected with the positive pole of the direct current power supply, and the contact coil of the fire alarm bypass control relay is connected with the negative pole of the direct current power supply.

7. The rail vehicle fire control circuit of claim 2, wherein, The fire alarm test circuit further comprises a first manual button for manually controlling the fire alarm test relay, the input end of the first manual button is connected with the first network module in parallel, and the output end of the first manual button is connected with the input end of the contact coil of the fire alarm test relay in series. And / or, the fire alarm starting circuit further comprises a second manual button for manually controlling the fire alarm control relay, the input end of the second manual button is connected with the second network module in parallel, and the output end of the second manual button is connected with the input end of the contact coil of the fire alarm control relay in series.

8. A safety circuit system for a rail vehicle having a number of cars, characterized in that Comprise: The rail vehicle fire alarm control circuit according to any one of claims 1-7 is located in the car; The first switch is located in the car and connected with the corresponding rail vehicle fire alarm control circuit in series, the first switches of all the cars are connected in series, and the first switch is used for turning on and off the train safety loop; The whole vehicle fire alarm control relay is located in the one-end car and the two-end car respectively, and is used for controlling the train braking when the train safety loop loses power; When a fire occurs in one of the cars, the first switch of the corresponding car is turned off, the train safety loop is turned off, and the whole vehicle fire alarm control relay loses power to control the train braking.

9. The safety loop system of claim 8, wherein, Further comprise: The second switch is located in the one-end car and the two-end car respectively, the input end of the second switch is connected with the positive pole of the direct current power supply, the output end of the second switch is connected with the input end of the whole vehicle fire alarm control relay in series, and the output end of the whole vehicle fire alarm control relay is connected with the negative pole of the direct current power supply; The rail vehicle fire alarm control circuit is connected with the input end of the whole vehicle fire alarm control relay, and the second switch is used for turning off when the current car is used as the occupied end.

10. The safety loop system of claim 8, wherein, Further comprise a fire alarm loop bypass switch arranged in at least one car; The fire alarm loop bypass switch has a bypass position, and when the train safety loop is turned on, the bypass position of the fire alarm loop bypass switch is in the off state; When the train safety loop is turned off, the bypass position of the fire alarm loop bypass switch of one of the cars is switched to the closed state, and the fire alarm loop bypass switch of the current car connects the positive pole of the direct current power supply of the train safety loop, the whole vehicle fire alarm control relay and the negative pole of the direct current power supply, forming a local safety loop. The first switch is the third contact of the fire alarm relay of the rail vehicle fire alarm control circuit.

11. The safety loop system of claim 8, wherein, Comprise a plurality of cars and the safety loop system according to any one of claims 8-11.

12. A rail vehicle, characterized by ​ 13. A rail vehicle according to claim 12, characterised in that The one-end car and the two-end car of the rail vehicle are respectively provided with a first switch and a whole-car fire alarm control relay in the safety loop system.

14. Railway vehicle according to claim 13, characterized in that Each of the cars is provided with a second switch of the safety loop system.

15. A rail vehicle according to claim 14, characterised in that The rail vehicle includes a motor train unit or a railway vehicle towed by a locomotive.

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