KR200211138Y1 - Transmission cable structure for diesel engines thermocouple - Google Patents

Abstract

The present invention is composed of the high-impact iron wire of the anode wire forming the cable for transmitting the current signal generated in the thermal couple in the thermocouple device for measuring the temperature of the exhaust gas of the high speed diesel engine and insulates the wires of the anode and cathode The present invention relates to a transmission cable in a diesel engine thermal coupler which prevents disconnection of wires due to sparks generated by vibration of an engine by configuring an insulation coating having excellent vibration resistance.

Description

Transmission cable structure for diesel engines thermocouple

In the present invention, the wires of the positive electrode constituting the transmission cable are composed of iron with excellent impact resistance, and the insulation coating for insulating the wires of the positive electrode and the negative electrode is composed of Teflon with excellent vibration resistance, thereby preventing the wire breakage caused by the vibration of the engine. A transmission cable of a diesel engine thermal coupling device is provided.

The thermocouple device is composed of two different types of metals or semiconductors, and transmits a current signal generated by a temperature difference between the metals or semiconductors to a current meter through a lead wire and a wire and converts the current signal into a current meter. It measures the temperature of the object and is mainly used to determine the state of the engine by measuring the temperature of the exhaust gas emitted from the exhaust pipe of a high speed diesel engine applied to a factory or a ship.

The transmission cable which transmits the current signal transmitted from the lead wire to the current measuring device includes a wire of positive and negative poles each coated with an insulating coating made of synthetic resin, a glass protective material covering the wires, and a stainless steel shield containing the glass protective material. It consists of. The wires of the positive electrode forming the conventional transmission cable are made of copper, the wire of the negative electrode is made of constantan alloy mainly composed of copper and nickel. Since the impact resistance is very weak and the insulation coating made of silicon is very weak at vibration resistance, the disconnection of wires occurs due to the spark caused by the vibration of the engine when measuring the exhaust gas temperature of a high speed diesel engine. It is difficult to do so adversely affects the operation of the engine and there is a problem that the life of the thermal coupler is shortened.

The object of the present invention is that the wires of the anode forming the cable are made of iron with high impact resistance, and the insulation coating for insulating the wires of the anode and the cathode, respectively, is composed of Teflon with excellent vibration resistance. The present invention provides a transmission cable for a diesel engine thermal coupling device that prevents wire breakage.

1 is an overall structural diagram of a thermocouple device,

2 is a cross-sectional view of the transmission cable of the present invention.

* Explanation of symbols for the main parts of the drawings

1: transmission cable 3: positive wire

4: wire of cathode 11: iron

12: constantan alloy 13: insulation coating

14 glass protective material 15 stainless steel shield

The present invention will be described in detail with reference to the drawings and embodiments.

In the thermocouple device connected to the exhaust pipe of a high speed diesel engine and measuring the temperature of the exhaust gas, an anode wire (3) forming a transmission cable (1) for transmitting a current signal transmitted from a lead wire connected to the thermocouple to a current meter (3). ) Is applied to 100% iron (11) material excellent in impact resistance, and the insulating coating 13 for insulating the outer diameters of the wires of the positive electrode and the negative electrode, respectively, is configured to apply Teflon excellent vibration resistance. On the other hand, the material of the constantan alloy 12 containing nickel and copper as a main component is applied to the element wire 4 of the cathode. A diesel engine thermal coupling device is formed by forming a glass protective material 14 having a constant thickness on the outer diameters of the wires of the positive and negative electrodes on which the Teflon insulating coating 13 is formed, and by forming a stainless steel shield 15 on the outer diameter of the glass protective material 14. To form the transmission cable (1).

Table-1 shows the structure comparison data of the conventional comparative example and the embodiment of the present invention, Table-2 shows the characteristic comparison data between the Example and the comparative example according to the material of the wire of the positive electrode as applied iron The wires of the positive electrode thus formed completely satisfy the electrical and mechanical properties required for the cables of the thermal coupler.

<Table-1>

division Comparative Example Example Material of element wire Anode: copper Cathode: Constantan Anode: iron Cathode: Constantan Element content of element wire Anode: 100% Copper Cathode: 44% Nickel, 56% Copper Anode: Iron 100% Cathode: 43% nickel, 2% manganese,           Iron 2%, copper 53% Junction temperature with thermal couple -20 to 100 ℃ -20 to 150 ℃ Electrical resistance 0.8 Ω / m or less 0.5 Ω / m or less Insulation Resistance 5㏁ / 10m or more 5㏁ / 10m or more Material of insulation sheath silicon Teflon

<Table-2>

division Ingredient Melting point Electrical resistance (μΩ / cm) density (g / cm 3) Resistance temperature coefficient Thermal Conductivity (Wm ^-1 ℃ ^-1 ) Example Fe 100% 1535 ℃ 13 7.86 0.005 66.2 Comparative example Cu 100% 1083 ℃ 1.724 8.92 0.004 388

As shown in Figs. 1 and 2, the wires of the positive electrode formed of iron and the negative electrode of the negative electrode formed of constantan alloy are insulated with an insulating coating made of Teflon, respectively, and part of both ends of the wire are exposed to the outside of the coating. As described above, the wires of the positive electrode and the negative electrode having the insulation coating are contacted side by side, and the glass wires are sandwiched in the outer diameter to bond the wires of the positive electrode and the negative electrode. The outer diameter of the glass protective material is fitted with a stainless steel shield to form a transmission cable.

The exposed end of the element wire of the positive electrode of the transmission cable is connected to the lead wire of the positive electrode and the exposed end of the element wire of the negative electrode is connected to the lead wire of the negative electrode for welding fixing. The other end of the element wire is connected to the current meter so that a transmission cable is installed.

As described above, when the wire of the positive electrode is formed of iron, the impact resistance of the wire is improved, and if the insulation coating that insulates the wires of the positive and negative electrodes is formed of Teflon, the vibration resistance of the wire is improved. Regardless of vibration, the thermocouple device can continuously measure the temperature of the exhaust pipe.

The transmission cable of the diesel engine thermal coupler according to the present invention is composed of iron with excellent impact resistance and insulation coating covering the positive and negative wires with Teflon with high vibration resistance, thereby reducing exhaust gas of a high speed diesel engine. Since the disconnection of the wire due to the spark generated by the vibration of the engine is prevented during temperature measurement, it is easy to grasp the state of the diesel engine, so that the operation of the engine is normally maintained and the life of the thermocouple device is extended.

Claims (1)

In the thermal coupling device for measuring the temperature of the exhaust gas of the exhaust pipe of the high-speed diesel engine of the models V396, V538, V956 series, In order to prevent the disconnection caused by the vibration of the engine in the wires of the positive and negative wires forming the cable for transmitting the current signal generated in the thermal couple, the positive wires (3) of the positive electrode and the negative electrode are composed of high impact resistance A transmission cable structure for a diesel engine thermal coupling device, characterized in that the insulation coating (13) covering the element wires is made of Teflon with excellent vibration resistance.