Railway vehicle load monitoring device

Abstract

The utility model relates to the technical field of train load monitoring, in particular to a railway vehicle load monitoring device which comprises a pressure monitoring unit and a monitoring host. The pressure monitoring unit is arranged based on an air spring, a branch air path is led out of a main air path of the air spring and connected with a one-way valve in an air path box, and the one-way valve is connected with a pressure transmitter. Wherein the flow direction of the one-way valve is the direction from the pressure transmitter to the branch gas circuit, the front end of the pressure transmitter is fixedly connected with an ejection piece, and a valve element of the one-way valve is in a normally open state under the ejection of the ejection piece; the pressure transmitter is connected with a monitoring host in a compartment, and the monitoring host is connected with a train-level management host through the Ethernet. By monitoring the pressure in the air spring, load monitoring on the load of the train carriage is realized, and whether the load of the carriage is unbalanced or overloaded is judged, so that the running safety of the train is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of train load monitoring, and particularly relates to a load monitoring device for rail vehicles. Background Art

[0002] An air spring is a non-metallic spring that adds pressurized air into a flexible sealed container and utilizes the compressibility of air to achieve an elastic effect. It is a suspension device used for secondary vibration reduction of rail vehicles. The air spring has excellent elastic characteristics and is installed between the car body and the bogie. Generally, two air springs are installed on each bogie. Its main function is to bear the car body load, adapt to displacements in multiple directions between the car body and the bogie, buffer and absorb vertical and lateral vibrations, ensure smooth operation of the vehicle and comfortable riding for passengers. At the same time, it can also cooperate with the height valve on the vehicle to adjust the internal air pressure so that the air spring maintains a constant height under different loads, avoiding violent vibrations of the train carriages, and playing a positive and effective role in the stability and comfort of railway vehicles.

[0003] At present, passenger trains only limit whether they are overcrowded, and do not limit or monitor whether there is overloading or uneven loading. When the train is overloaded or unevenly loaded during operation, it also seriously affects the driving safety. Therefore, it is particularly necessary to add load monitoring to the existing train driving safety monitoring. Since the air spring bears the pressure of the carriage, monitoring the pressure in the air spring can effectively reflect the load situation of the carriage. Therefore, based on the air spring, we propose a monitoring device to achieve the monitoring of whether the vehicle is unevenly loaded or overloaded, thereby further improving the driving safety of the train. Content of the Utility Model

[0004] The purpose of the utility model is to provide a load monitoring device for rail vehicles aiming at the deficiencies of the above-mentioned existing technologies, so as to achieve the purpose of monitoring the load of the train carriage and ensuring driving safety.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A load monitoring device for rail vehicles includes air springs. The number of air springs is four and they are arranged and installed on the bogies at the bottom of the train carriage. It also includes a pressure monitoring unit and a monitoring host, and the pressure monitoring unit is connected to the monitoring host.

[0006] The pressure monitoring unit is arranged based on the air spring. An air circuit box is connected to the main air circuit of the air spring. The air circuit box is fixedly installed on the bogie, and a pressure transmitter is installed in the air circuit box. The pressure transmitter is connected to the monitoring host.

[0007] A microprocessor is set in the monitoring host. The pressure transmitter is connected to the microprocessor, and the microprocessor is connected to the train-level management host through a communication module.

[0008] Further, a tee is provided on the main air path of the air spring, a branch air path is connected through the tee, the branch air path is connected to an air path box, and a cut-off cock is installed on the branch air path.

[0009] Further, the branch air path is connected to a check valve, the check valve is connected to a pressure transmitter, and the flow direction of the check valve is from the pressure transmitter to the branch air path; a pushing member is provided between the front end of the pressure transmitter and the valve core of the check valve, and the valve core of the check valve is just in an open state under the pushing of the pushing member.

[0010] Further, a signal input interface is provided on the monitoring host, and the signal input interface is connected to the pressure transmitter.

[0011] Further, the signal input interface is connected to an isolation transmitter, the isolation transmitter is connected to a microprocessor, and the microprocessor is respectively connected to a power supply module, a communication module and an indicator light.

[0012] Further, the number of the pressure monitoring units is four, each pressure monitoring unit includes a pressure transmitter, the number of the signal input interfaces is four and corresponds to the pressure transmitters one by one, and the number of the isolation transmitters is four and corresponds to the signal input interfaces one by one.

[0013] Further, the power supply module is connected to a power supply interface, and the communication module is connected to an Ethernet interface.

[0014] Further, the indicator lights include a pressure transmitter indicator light, a communication indicator light, a power supply indicator light, a working indicator light and an Ethernet indicator light.

[0015] Advantages of the utility model:

[0016] 1. By monitoring the pressure in the air spring, the load of the train carriage can be detected, and it can be judged whether there is overloading or uneven loading in the carriage, which plays a positive and effective role in ensuring the driving safety;

[0017] 2. A check valve is provided at the front end of the pressure transmitter, which can avoid air leakage caused by the loosening of the pressure transmitter. When the pressure transmitter becomes loose, the check valve will close under the action of air pressure, and there will be no air leakage, which can effectively ensure the stability of the air spring during use. Description of the drawings

[0018] Figure 1 is a schematic connection diagram of the monitoring unit and the monitoring host of the utility model;

[0019] Figure 2 is a schematic installation diagram of the monitoring unit of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection between the one-way valve and the pressure transmitter in the air circuit box of the present utility model;

[0021] Figure 4 It is a schematic diagram of the overall structure of the monitoring host of the present utility model;

[0022] Figure 5 It is a schematic diagram of the internal structure of the monitoring host of the present utility model.

[0023] The names corresponding to the marks in the figure:

[0024] 1. Air spring; 11. Main air circuit; 12. Three-way joint; 13. Branch air circuit; 14. Cut-off cock; 2. Bogie; 3. Air circuit box; 31. Pressure transmitter; 32. One-way valve; 33. Pushing member; 4. Monitoring host; 41. Power supply interface; 42. Signal input interface; 43. Ethernet interface; 44. Indicator light; 45. Isolation transmitter; 46. Microprocessor; 47. Communication module; 48. Power supply module. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present utility model.

[0026] Embodiments of the present utility model:

[0027] As Figures 1-4 shown, in this embodiment, multiple pressure monitoring units are provided. The multiple pressure monitoring units are respectively connected to the monitoring host 4 in the carriage. The monitoring host 4 is connected to an external power supply, and it is provided that the monitoring host 4 is connected to the train-level management host through Ethernet.

[0028] In this embodiment, four pressure monitoring units are provided under each carriage, which are respectively arranged on the bogies 2 at the front and rear of each carriage. Two are respectively arranged on each bogie 2, and one is arranged on each side of the bogie 2.

[0029] Among them, each pressure monitoring unit includes an air spring 1. The air spring 1 is installed on the bogie 2. A tee 12 is provided on the main air path 11 of the air spring 1. The main air path 11 is connected to the branch air path 13 through the tee 12. The branch air path 13 is connected to the air path box 3. The air path box 3 is also fixedly installed on the bogie 2. A cut-off cock 14 is installed on the branch air path 13. The branch air path 13 is connected to a check valve 32 in the air path box 3. The check valve 32 is connected to a pressure transmitter 31 by thread. The flow direction of the check valve 32 is from the pressure transmitter 31 to the branch air path 13. A pushing member 33 is provided between the front end of the pressure transmitter 31 and the valve core of the check valve 32. Both ends of the pushing member 33 are circular rings, and a plurality of connecting rods are fixedly connected between the two circular rings for support (without affecting the probe of the pressure transmitter 31 and the connection of the air path). One end of the pushing member 33 abuts against the front end of the pressure transmitter 31 (or can be fixedly connected). The other end of the pushing member 33 abuts against the valve core of the check valve 32. Under the action of the pushing member 33, the check valve 32 is in an open state all the time; the pressure transmitter 31 is connected to the monitoring host 4 in the carriage.

[0030] In the above four pressure monitoring units, a pressure transmitter 31 is provided in each pressure monitoring unit. Thus, four pressure transmitters 31 are provided under each carriage and are respectively connected to the monitoring host 4 in the carriage. Four signal input interfaces 42 are provided on the monitoring host 4. The four signal input interfaces 42 correspond to the four pressure transmitters 31 one by one. Each signal input interface 42 is respectively connected to a microprocessor 46 through an isolation transmitter 45. A communication module 47 is provided in the monitoring host 4 and is connected to the microprocessor 46. At the same time, a power supply module 48 is also provided and is connected to the microprocessor 46. The power supply module 48 is connected to the carriage power supply through a power supply interface 41. The communication module 47 is connected to the Ethernet through an Ethernet interface 43; and an indicator light 44 is provided on the monitoring host 4. The indicator light 44 is used to indicate the working status of each component.

[0031] In this embodiment, the power supply interface 41 and the signal input interface 42 are 2-core flange connectors; the Ethernet interface 43 is a 4-core D-type aviation plug female head; the microprocessor 46 has a built-in high-resolution ADC conversion; the pressure transmitter 31 is of a direct-lead explosion-proof type; the isolation transmitter 45 is an active type; the monitoring host 4 is powered by DC48V on the vehicle, and the power supply module 48 outputs DC24V after voltage conversion; the communication module 47 is an Ethernet-to-TTL serial port module.

[0032] In this embodiment, the indicator light 44 includes the indicator lights 44 of the pressure transmitter 31, such as Figure 3 Left 1, Left 2, Right 1 and Right 2 in the attachment, a total of four, are used to indicate the working status of the pressure transmitter 31; it also includes a communication indicator light 44, such as Figure 3Transmission and reception therein are used for indicating the communication status; it also includes a power indicator light 44, as shown in the appendix Figure 3 The power supply therein is used for indicating the power supply status; it also includes a working indicator light 44, as shown in the appendix Figure 3 The work therein is used for indicating the working status; it also includes an Ethernet indicator light 44, as shown in the appendix Figure 3 Connection and data therein are respectively used for indicating Ethernet connection and indicating Ethernet data transmission; each of the above signal indicator lights 44 is respectively connected to the microprocessor 46.

[0033] The principle of the present utility model is as follows:

[0034] Currently, two bogies 2 are provided under each train carriage, and an air spring 1 is installed on both sides of each bogie 2; when the present utility model is in use, four pressure monitoring units are provided under each carriage, and the pressure monitoring units are arranged relying on the air spring 1 on the existing train bogie 2.

[0035] By using a tee 12 on the main air path 11 of the air spring 1 to lead out a branch air path 13, the pressure in the air spring 1 is measured, so as to measure the load of the train; during the process, a pressure transmitter 31 is installed through an air path box 3 to measure the pressure, and a shut-off cock 14 is arranged on the branch air path 13 to ensure the safety of use.

[0036] In the present utility model, since a branch air path 13 is led out and a pressure transmitter 31 is used to detect the pressure on the branch air path 13, there is a risk of air leakage if the pressure transmitter 31 becomes loose during the process, which affects the stable use of the air spring 1; thus, in the present utility model, a check valve 32 is installed between the branch air path 13 and the pressure transmitter 31, so that the opening direction of the check valve 32 is from the pressure transmitter 31 to the branch air path 13, and a pushing member 33 is arranged between the valve core of the pressure transmitter 31 and the check valve 32. Relying on the pushing member 33, the valve core of the check valve 32 is just in an open state. So when the pressure transmitter 31 becomes loose under long-term vibration conditions, the supporting force of the pushing member 33 is lost, and the check valve 32 closes automatically under air pressure, thus avoiding air leakage.

[0037] The signal detected by the pressure transmitter 31 is transmitted to the monitoring host 4. During this process, the monitoring host 4 can be installed in the conductor's cabin of each carriage. In the monitoring host 4, the signal transmitted by the pressure transmitter 31 is transmitted to the microprocessor 46 after passing through the isolation transmitter 45. After being processed by the microprocessor 46, the signal is transmitted to the train management host through the communication module 47 via the Ethernet interface 43. Thus, the observation of the load and uneven load conditions of each carriage can be realized on the train management host. When overloading or uneven loading is detected, the management personnel can handle it in a timely manner, which plays a positive and effective role in ensuring the safety of train operation. During this process, the train management host is existing and is used for receiving and displaying signals, which belongs to a mature technical means and will not be elaborated here.

[0038] During the use of the monitoring host 4, it is powered by the original DC48V or DC110V on the vehicle. After being stepped down by the power module 48, it outputs DC24V to supply power to each component in the monitoring host 4.

Claims

1. A rail vehicle load monitoring device, comprising an air spring (1), wherein the number of the air springs (1) is four and the air springs (1) are arranged and mounted on a bogie (2) at the bottom of a train compartment, and wherein: It also includes a pressure monitoring unit and a monitoring host (4), wherein the pressure monitoring unit is connected to the monitoring host (4); The pressure monitoring unit is arranged based on the air spring (1), an air circuit box (3) is connected to the main air circuit (11) of the air spring (1), the air circuit box (3) is fixedly mounted on the bogie (2), a pressure transmitter (31) is installed in the air circuit box (3), and the pressure transmitter (31) is connected to the monitoring host (4); The monitoring host (4) is provided with a microprocessor (46), the pressure transmitter (31) is connected to the microprocessor (46), and the microprocessor (46) is connected to the train-level management host via a communication module (47).

2. A rail vehicle load monitoring device according to claim 1, characterized in that: The main air circuit (11) of the air spring (1) is provided with a tee (12), a branch air circuit (13) is connected via the tee (12), the branch air circuit (13) is connected to the air circuit box (3), and a shutoff valve (14) is installed on the branch air circuit (13).

3. A rail vehicle load monitoring device according to claim 2, characterized in that: The branch gas path (13) is connected to the one-way valve (32), the one-way valve (32) is connected to the pressure transmitter (31), and the flow direction of the one-way valve (32) is from the pressure transmitter (31) to the branch gas path (13); a push member (33) is provided between the front end of the pressure transmitter (31) and the valve core of the one-way valve (32), and the valve core of the one-way valve (32) is in a normally open state under the push of the push member (33).

4. A rail vehicle load monitoring device according to claim 1, characterized in that: The monitoring host (4) is provided with a signal input interface (42), and the signal input interface (42) is connected to the pressure transmitter (31).

5. A rail vehicle load monitoring device according to claim 4, characterized in that: The signal input interface (42) is connected to the isolation transmitter (45), the isolation transmitter (45) is connected to the microprocessor (46), and the microprocessor (46) is respectively connected to the power module (48), the communication module (47) and the indicator light (44).

6. A rail vehicle load monitoring device according to claim 5, characterized in that: The number of the pressure monitoring units is four, each of which includes a pressure transmitter (31), the number of the signal input interfaces (42) is four and corresponds one-to-one with the pressure transmitters (31), and the number of the isolation transmitters (45) is four and corresponds one-to-one with the signal input interfaces (42).

7. A rail vehicle load monitoring device according to claim 5, characterized in that: The power module (48) is connected to the power interface (41), and the communication module (47) is connected to the Ethernet interface (43).

8. A rail vehicle load monitoring device according to claim 5, characterized in that: The indicator lights (44) include a pressure transmitter indicator light, a communication indicator light, a power indicator light, a working indicator light and an Ethernet indicator light.

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