A monitoring and alarm device for the return process of urban railway vehicles

Abstract

The present invention relates to a monitoring and alarm device for a return process of a railway vehicle, comprising a power supply detection module, a time delay relay, an intermediate relay, and an audible and visual alarm light. When the railway vehicle encounters a situation where the brakes are not released or the brakes are applied, a brake release signal changes from a high level to a low level, the coil of the time delay relay is de-energized, a time delay closing normally closed contact is delayed to close, and a brake release audible and visual alarm light emits an audible and visual alarm prompt. When the railway vehicle encounters an emergency brake situation, an emergency brake signal changes from a high level to a low level, the normally closed contact of the intermediate relay is instantaneously disconnected, and an emergency brake audible and visual alarm light emits an audible and visual alarm prompt. When the bus voltage of the railway vehicle is lower than a voltage threshold, the power supply detection audible and visual alarm light emits an audible and visual alarm prompt. The device can provide audible and visual alarm prompts for abnormal conditions occurring in the railway vehicle during the return process, enabling supervisors to promptly discover and take prompt and appropriate measures to avoid serious accidents and reduce economic losses.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle control, and in particular to a monitoring and alarm device for a return process of an urban railway vehicle. Background Art

[0002] In the past, the existing monitoring model for urban rail vehicle return transport involved supervisors visually monitoring technical parameters such as the train pipe pressure and vehicle power supply voltage 24 hours a day in the monitoring room of a special return vehicle. Supervisors also used the observation windows to observe whether the urban rail vehicle's wheels were smoking or making unusual noises during operation to determine whether the return vehicle was operating normally. However, this monitoring model was slow to detect faults during operation, often preventing immediate notification of faults and timely communication with the locomotive driver, posing a significant potential hazard to the return transport. According to the latest vehicle return transport requirements of the China Railway Corporation, return transport vehicles must be equipped with monitoring and alarm devices during the return process to ensure driving safety. Otherwise, return transport will no longer be provided. Furthermore, the cost of using automobiles for transportation is 50 times that of rail transport. Therefore, it is essential to design a monitoring and alarm device for the return transport process of urban rail vehicles. Summary of the Invention

[0003] In order to solve the problem in the prior art that the process of urban railway vehicles returning over the track relies on supervisors to observe whether the urban railway vehicles are operating normally through lookout windows, resulting in a lag in fault detection and the inability to know the occurrence of the fault in the first time, the present invention provides an urban railway vehicle return process monitoring and alarm device.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A monitoring and alarm device for the return process of urban railway vehicles, comprising a voltage conversion module, a power detection module, a time delay relay, an intermediate relay, a diode, a pressure switch, a brake relief sound and light alarm light, an emergency brake sound and light alarm light, a power detection sound and light alarm light, and a device power indicator light;

[0006] The DC power supply of the return vehicle is divided into two output paths, one of which is output to the voltage conversion module, which converts the voltage of the DC power supply into a preset voltage and then supplies power to the device power indicator light and the power detection module. The other path supplies power to the emergency brake branch, the brake relief branch and the coil of the delay relay. The emergency brake branch includes the emergency brake sound and light warning light and the normally closed contact of the intermediate relay connected in series with it. The brake relief branch includes the brake relief sound and light warning light and the delayed closing normally closed contact of the delay relay connected in series with it.

[0007] The brake relief signal of the urban railway vehicle is input to the signal input end of the delay relay through the diode. The signal input end of the delay relay is also connected to the positive pole of the DC power supply of the return vehicle through the pressure switch. The pressure switch is used to detect the brake pressure signal of the return vehicle through the pressure sensor and close when the brake pressure signal is greater than the pressure threshold. When the brake of the urban railway vehicle is not relieved or the brake is applied, the brake relief signal changes from a high level to a low level, the coil of the delay relay is de-energized, and the delayed closed normally closed contact of the delay relay is closed after a preset delay time, and the brake relief sound and light alarm light emits an sound and light alarm prompt.

[0008] The emergency braking signal of the urban rail vehicle is input to one end of the coil of the intermediate relay, and the other end of the coil is connected to the negative pole of the busbar of the urban rail vehicle. When the urban rail vehicle encounters an emergency braking situation, the emergency braking signal changes from a high level to a low level, the normally closed contact of the intermediate relay is instantly disconnected, and the emergency braking sound and light alarm light emits an sound and light alarm prompt;

[0009] The power supply detection module is used to detect the bus voltage of the urban rail vehicle. When the bus voltage of the urban rail vehicle is lower than the voltage threshold, the power supply detection module controls the detection contacts connecting the positive pole of the return vehicle power supply and the power supply detection sound and light alarm light to close, and the power supply detection sound and light alarm light emits an sound and light alarm prompt.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The urban rail vehicle return process monitoring and alarm device proposed by the present invention collects the brake release signal, emergency brake signal and bus voltage of the urban rail vehicle, and uses a delay relay, a time relay, a power detection module and their corresponding sound and light alarm lights to respectively realize sound and light alarm prompts when the urban rail vehicle has no brake release or brake application, emergency braking and the bus voltage is lower than the voltage threshold, so that the supervisor can promptly discover abnormal conditions that occur during the urban rail vehicle return process, communicate with the locomotive driver in time and make quick and appropriate handling to avoid serious accidents and minimize economic losses. At the same time, the urban rail vehicle return process monitoring and alarm device of the present invention effectively ensures the driving safety of the urban rail vehicle, enables the urban rail vehicle to meet the requirements of over-track transportation, and thus greatly reduces its transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a schematic diagram of a monitoring and alarm device for the return process of urban railway vehicles. DETAILED DESCRIPTION

[0013] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0014] like Figure 1 As shown, the present invention provides a monitoring and alarm device for the return process of urban railway vehicles, which includes a voltage conversion module, a power detection module, a delay relay KT, an intermediate relay K, a diode D, a pressure switch S, a brake relief sound and light alarm light RD1, an emergency brake sound and light alarm light RD2, a power detection sound and light alarm light RD3 and a device power indicator light GN.

[0015] Specifically, the DC power supply of the returning vehicle is divided into two outputs, one of which is output to the voltage conversion module. The function of the voltage conversion module is to convert the high voltage of the DC power supply of the returning vehicle into a preset voltage (for example, DC12V) and then power the device power indicator light GN and the power detection module. The device power indicator light GN is used to indicate the working status of the monitoring alarm device; the other is to power the coils of the emergency braking branch, the brake relief branch and the delay relay, wherein the emergency braking branch includes the emergency braking sound and light alarm light RD2 and the normally closed contacts of the intermediate relay K connected in series with the emergency braking sound and light alarm light RD2, and the brake relief branch includes the brake relief sound and light alarm light RD1 and the delayed closed normally closed contacts of the delay relay KT connected in series with the brake relief sound and light alarm light RD1.

[0016] The urban rail vehicle's brake release signal is input to the signal input of the time delay relay KT via diode D. When the brake release signal is high, the coil of the time delay relay KT is energized, and the delayed closed normally closed contact opens. The signal input of the time delay relay KT is also connected to the positive terminal of the DC power supply of the return vehicle via a pressure switch S. The pressure switch S is used to detect the brake pressure signal of the return vehicle through a pressure sensor and close when the brake pressure signal exceeds a pressure threshold. Preferably, the pressure threshold is 80kPa. When the urban rail vehicle's brakes are not released or the brakes are applied, the brake release signal output by the urban rail vehicle switches from a high level to a low level, the coil of the time delay relay KT is de-energized, and the delayed closed normally closed contact of the time delay relay KT closes after a preset delay time. The brake release sound and light alarm light RD1 is energized, emitting an sound and light alarm prompt. Preferably, the preset delay time of the time delay relay KT is 3 seconds, that is, 3 seconds after the coil of the delay relay KT is de-energized, the delayed closed normally closed contact closes.

[0017] The emergency braking signal of the urban rail vehicle is input to one end of the coil of the intermediate relay K, and the other end of the coil is connected to the negative pole of the busbar of the urban rail vehicle. The emergency braking signal is high level. When the urban rail vehicle encounters an emergency braking situation, the emergency braking signal output by the urban rail vehicle changes from high level to low level, and the normally closed contact of the intermediate relay K is instantly disconnected. The emergency braking sound and light alarm light RD2 is energized and an sound and light alarm prompt is issued.

[0018] The power detection module is used to detect the bus voltage of the urban rail vehicle. When the bus voltage of the urban rail vehicle falls below a voltage threshold, the power detection module controls the detection contact connecting the positive terminal of the return vehicle power supply and the power detection sound and light alarm light RD3 to close. The power detection sound and light alarm light RD3 is energized and emits an audible and visual alarm prompt. Preferably, the voltage threshold is DC100V.

[0019] The monitoring and alarm device of the present invention collects signals such as the bus voltage signal of the urban rail vehicle, the emergency braking signal of the urban rail vehicle, the brake release / application signal of the urban rail vehicle, the brake pressure signal of the return vehicle, and the voltage of the return vehicle. It determines whether the urban rail vehicle is braking normally based on the high and low levels of the signal transmitted by the urban rail vehicle and the brake pressure of the return vehicle, and uses an audible and visual alarm light to remind the monitoring personnel of the current status of the vehicle. The process of the monitoring and alarm device of the present invention to issue corresponding audible and visual alarm prompts for abnormal situations that occur during the return process is as follows:

[0020] (1) Compare the brake cylinder pressure of the return vehicle collected by the pressure sensor with the pressure threshold. When there is pressure in the brake cylinder of the return vehicle, it proves that the locomotive driver has applied the brakes normally. At this time, the monitoring alarm device does not issue an audible or visual alarm prompt. When the brake cylinder pressure of the return vehicle is "zero", that is, the return vehicle has not braked, but the urban rail vehicle has not braked or has applied the brakes, the brake relief signal collected from the urban rail vehicle changes from a high level to a low level, and the monitoring alarm device delays 3 seconds to issue an audible and visual alarm prompt. The supervisor needs to take emergency measures as soon as possible.

[0021] (2) When an urban rail vehicle encounters emergency braking, the emergency braking signal collected at this time changes from a high level to a low level, and the monitoring alarm device immediately issues an audible and visual alarm prompt, and the monitoring personnel need to take emergency measures as soon as possible.

[0022] (3) When the bus voltage of the urban rail vehicle is lower than DC100V, the monitoring alarm device will immediately issue an audible and visual alarm prompt, and the supervisory personnel must immediately check the power supply from the return vehicle to the urban rail vehicle to avoid major accidents caused by emergency braking of the urban rail vehicle due to low working voltage.

[0023] The urban rail vehicle return process monitoring and alarm device proposed by the present invention collects the brake release signal, emergency brake signal and bus voltage of the urban rail vehicle, and uses a delay relay, a time relay, a power detection module and their corresponding sound and light alarm lights to respectively realize sound and light alarm prompts when the urban rail vehicle has no brake release or brake application, emergency braking and the bus voltage is lower than the voltage threshold, so that the supervisor can promptly discover abnormal conditions that occur during the urban rail vehicle return process, communicate with the locomotive driver in time and make quick and appropriate handling to avoid serious accidents and minimize economic losses. At the same time, the urban rail vehicle return process monitoring and alarm device of the present invention effectively ensures the driving safety of the urban rail vehicle, enables the urban rail vehicle to meet the requirements of over-track transportation, and thus greatly reduces its transportation cost.

[0024] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0025] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A monitoring and alarm device for the return process of urban railway vehicles, characterized in that: It includes a voltage conversion module, a power detection module, a time delay relay, an intermediate relay, a diode, a pressure switch, a brake relief sound and light warning light, an emergency brake sound and light warning light, a power detection sound and light warning light, and a device power indicator light; The DC power supply of the return vehicle is divided into two output paths, one of which is output to the voltage conversion module, which converts the voltage of the DC power supply into a preset voltage and then supplies power to the device power indicator light and the power detection module. The other path supplies power to the emergency brake branch, the brake relief branch and the coil of the delay relay. The emergency brake branch includes the emergency brake sound and light warning light and the normally closed contact of the intermediate relay connected in series with it. The brake relief branch includes the brake relief sound and light warning light and the delayed closing normally closed contact of the delay relay connected in series with it. The brake relief signal of the urban railway vehicle is input to the signal input end of the delay relay through the diode. The brake relief signal is at a high level. At this time, the coil of the delay relay KT is energized, and the delayed closed normally closed contact is disconnected. The signal input end of the delay relay is also connected to the positive pole of the DC power supply of the return vehicle through the pressure switch. The pressure switch is used to detect the brake pressure signal of the return vehicle through the pressure sensor and close when the brake pressure signal is greater than the pressure threshold; when the brake of the urban railway vehicle is not relieved or the brake is applied, the brake relief signal changes from a high level to a low level, the coil of the delay relay is de-energized, and the delayed closed normally closed contact of the delay relay is closed after a preset delay time, and the brake relief sound and light alarm light emits an sound and light alarm prompt; The emergency braking signal of the urban rail vehicle is input to one end of the coil of the intermediate relay, and the other end of the coil is connected to the negative pole of the busbar of the urban rail vehicle. When the urban rail vehicle encounters an emergency braking situation, the emergency braking signal changes from a high level to a low level, the normally closed contact of the intermediate relay is instantly disconnected, and the emergency braking sound and light alarm light emits an sound and light alarm prompt; The power supply detection module is used to detect the bus voltage of the urban rail vehicle. When the bus voltage of the urban rail vehicle is lower than the voltage threshold, the power supply detection module controls the detection contacts connecting the positive pole of the return vehicle power supply and the power supply detection sound and light alarm light to close, and the power supply detection sound and light alarm light emits an sound and light alarm prompt.

2. The urban railway vehicle return process monitoring and alarm device according to claim 1 is characterized in that: The pressure threshold is 80Kpa, and the voltage threshold is DC100V.

3. The urban railway vehicle return process monitoring and alarm device according to claim 1 is characterized in that: The preset delay time of the delay relay is 3s.

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