Hydraulic oil pressure detection device

Abstract

The utility model discloses a hydraulic oil pressure detection device which comprises a pressure sensor body, one end of the pressure sensor body is a detection end interface, the other end of the pressure sensor body is a signal output end, the detection end interface is a G1 / 4 pressure interface used for being connected with an oil cylinder interface, and the signal output end is connected with a cable through an M12 connector. The pressure sensor body, the G1 / 4 pressure interface, the M12 connector and the cable are of an integral structure. According to the utility model, the electrical interface of the integrated pressure sensor is changed from an M12 type to a wire throwing type, so that the fault that an M12 connector falls off and a cable falls off is solved; and secondly, an integrated totally-closed structure is adopted, the IP grade is IP67, and the device is suitable for an under-vehicle installation environment and is convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of rail transit technology. Background Technology

[0002] Currently, all auxiliary steering cylinder pressure sensors for monorail vehicles are equipped with a circular metal housing, which is cylindrical in appearance, with a pressure interface at one end and a connector at the other end. For example, the published document with announcement number CN204077700U, publication date January 7, 2015, and patent title "Pressure Sensor Box for Train Main Air Pipe, Train Pipe, Brake Cylinder or Auxiliary Air Pipe", discloses a cylinder pressure sensor box including a protective shell, a connector with a check valve function installed on the protective shell, the connector with the check valve function being connected to a heterogeneous redundancy safety pressure transmitter, the heterogeneous redundancy safety pressure transmitter including a sensor control circuit installed inside the shell, a sensor base installed at one end of the shell, a main air inlet provided on the sensor base, the main air inlet being connected to the air inlet of a strain gauge sensor and an air inlet of a silicon diffusion sensor, strain gauge sensor and silicon diffusion sensor mounting holes respectively provided on both sides of the sensor base, a Pascal strain gauge and a strain gauge gasket are provided in the strain gauge sensor mounting hole, a silicon diffusion sheet and a silicon diffusion gasket are provided in the silicon diffusion sensor mounting hole, and the Pascal strain gauge and silicon diffusion sheet are respectively connected to the sensor control circuit through leads.

[0003] Similar sensors can measure and monitor the pressure of fluids such as oil. The connector side is a connector, and in actual use, the electrical connector often comes loose. This is especially problematic when used on high-speed trains, where the connector is bolted to the circular metal housing. Prolonged impact and vibration can cause it to detach, leading to sensor signal loss and loss of auxiliary steering cylinder pressure values, thus affecting normal train operation. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to realize a hydraulic oil pressure detection device that reduces the problem of sensor electrical connector detachment when used on trains.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hydraulic oil pressure detection device, including a pressure sensor body, one end of which is a detection end interface and the other end is a signal output end. The detection end interface is a G1 / 4 pressure interface for connecting to the oil cylinder interface. The signal output end is connected to a cable via an M12 connector. The pressure sensor body, the G1 / 4 pressure interface, the M12 connector, and the cable are an integral structure.

[0006] The outer shell of the pressure sensor body is a cylindrical metal shell.

[0007] The M12 connector is a wire-spin M12 connector.

[0008] The G1 / 4 pressure port and the cylinder port are fastened together by nuts, and there are two nuts.

[0009] The hydraulic oil pressure detection device is installed on the auxiliary steering cylinder of the monorail vehicle to acquire the pressure signal in the auxiliary steering cylinder. The detection end interface is connected to the auxiliary steering cylinder interface of the monorail vehicle.

[0010] The cable has a core wire inside and is connected to the vehicle's CAN OPEN interface to transmit the signal collected by the pressure sensor to the vehicle's CAN interface.

[0011] The cable core has five wires, including a shield wire, a power + wire, a power - wire, a CAN_H wire, and a CAN_L wire.

[0012] This utility model changes the electrical interface of the integrated pressure sensor from M12 to a wire-spinning type, solving the problems of M12 connector detachment and cable detachment; secondly, it adopts an integrated fully enclosed structure with an IP rating of IP67, making it suitable for under-vehicle installation and easy to install. Attached Figure Description

[0013] The following is a brief explanation of the content and markings in each of the accompanying drawings in this utility model specification:

[0014] Figure 1 This is a schematic diagram of a hydraulic oil pressure detection device.

[0015] Figure 2 Wiring diagram for hydraulic oil pressure detection device;

[0016] The markings in the above figures are: 1. G1 / 4 pressure interface, 2. pressure sensor body, 3. M12 connector, 4. cable, 5. cable core wire. Detailed Implementation

[0017] The following description, with reference to the accompanying drawings, details the specific implementation of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods. This will help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model.

[0018] like Figure 1 As shown, the hydraulic oil pressure detection device is equipped with a pressure sensor body 2. The pressure sensor body 2 adopts the existing cylindrical sensor structure, and its outer shell is a cylindrical metal shell structure, which can protect the internal components, reduce the volume occupied by the shell, and improve its pressure resistance.

[0019] The pressure sensor body 2 has a detection interface at one end and a signal output end at the other end. The detection interface is a G1 / 4 pressure interface 1 used to connect to the hydraulic cylinder interface. The signal output end is connected to an M12 connector 3, and a cable 4 extends from the M12 connector 3. The cable 4 is preferably 5x0.5mm. 2 The cable, pressure sensor body 2, G1 / 4 pressure interface 1, M12 connector 3, and cable 4 are integrated into a single structure, making it a new type of integrated pressure sensor. The pressure sensor G1 / 4 pressure interface 1 connects to the auxiliary steering cylinder interface of the monorail vehicle, and cable 4 connects directly to the vehicle's CANOPEN interface. The sensor converts the hydraulic pressure into an electrical signal, which is transmitted directly to the vehicle via the CAN interface.

[0020] With the above structure, the electrical interface of the pressure sensor has been changed from M12 to a wire-spinning type, which solves the problems of M12 connector 3 falling off and cable 4 falling off; secondly, it adopts an integrated fully enclosed structure with an IP rating of IP67, which is suitable for under-vehicle installation environment and is easy to install.

[0021] The G1 / 4 pressure interface 1 is a pipe thread structure, used for direct connection to the auxiliary steering cylinder pressure interface. After connection, it is secured by a nut on the outside of the G1 / 4 pressure interface 1. It is preferable to use two nuts simultaneously, one for fixing and the other for locking, to prevent accidents caused by loose nuts during operation. Cable core 5 connects directly to the monorail vehicle's CANOPEN interface. The wiring definition for cable core 5 is as follows: Figure 2 The signal is defined as shown in Table 1.

[0022] M12 connector location Core wire colors and definitions Signal 1 WH1 shield 2 WH4 Power supply + (24V+) 3 WH3 Power supply - (0V) 4 WH2 CANH 5 WH5 CAN_L

[0023] The cable core wire 5 has five lines, including a shield wire, a power + wire, a power - wire, a CAN_H wire, and a CAN_L wire.

[0024] Currently, the auxiliary steering pressure sensor for monorail vehicles, M12 connector 3, and cable 4 are three separate devices. During the current project, connector detachment or cable loosening has occurred multiple times, resulting in sensor signal loss. Through integrated design, this detachment failure will no longer occur.

[0025] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A hydraulic oil pressure detection device, comprising a pressure sensor body, wherein one end of the pressure sensor body is a detection interface and the other end is a signal output terminal, characterized in that: The detection end interface is a G1 / 4 pressure interface for connecting to the hydraulic cylinder interface, and the signal output end is connected to the cable via an M12 connector. The pressure sensor body, the G1 / 4 pressure interface, the M12 connector and the cable are an integral structure.

2. The hydraulic oil pressure detection device according to claim 1, characterized in that: The outer shell of the pressure sensor body is a cylindrical metal shell.

3. The hydraulic oil pressure detection device according to claim 2, characterized in that: The M12 connector is a wire-spin M12 connector.

4. The hydraulic oil pressure detection device according to claim 3, characterized in that: The G1 / 4 pressure port and the cylinder port are fastened together by nuts, and there are two nuts.

5. The hydraulic oil pressure detection device according to claim 1, 2, 3 or 4, characterized in that: The hydraulic oil pressure detection device is installed on the auxiliary steering cylinder of the monorail vehicle to obtain the pressure signal of the auxiliary steering cylinder. The detection end interface is connected to the auxiliary steering cylinder interface of the monorail vehicle.

6. The hydraulic oil pressure detection device according to claim 5, characterized in that: The cable has a core wire inside and is connected to the vehicle's CAN OPEN interface to transmit the signal collected by the pressure sensor to the vehicle's CAN interface.

7. The hydraulic oil pressure detection device according to claim 6, characterized in that: The cable core has five wires, including a shield wire, a power + wire, a power - wire, a CAN_H wire, and a CAN_L wire.

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