Wear-resistant thermal resistance WZPN-230 WZPN-130 WZPN-430 is a high-tech class ideal for high-temperature and wear-resistant environments such as circulating fluidized bed boilers, boiling boilers, coal-fired coal gasifiers, and cement plant kiln heads, kiln tails, furnace head covers, and chemical and smelting. Dedicated products.
Abrasion-resistant thermal resistances are the same as wear-resistant thermocouples in circulating fluidized boilers, boiling boilers, pulverizers, gasifiers, and cement plant kiln heads, kiln tails, furnace head covers and chemical, smelting, etc. The high-tech special product with ideal environment, wear-resistant thermal resistance draws many advantages, and adopts a unique process formula to produce a wear-resistant alloy in the state of out-of-balance. This product is compatible with ordinary stainless steel metals, cermet protection tubes, and similar wear-resistant alloys on the market. Compared with the protection tube, its service life is increased by 1-5 times. Due to the difference in ambient temperature, the temperature control point is too high, the vibration is large, the blower wind speed is too high, and the wear is serious, which makes the temperature measurement very difficult, the service life is very short, and the general The wear-resistant alloy can be worn through in only 10-90 days, and it will be damaged, burned, broken, and cause thermal resistance damage, which will bring great loss and unnecessary trouble to the user.The wear-resistant thermocouple makes up for this shortcoming.
The wear-resistant thermal resistance is resistant to scouring.After hundreds of manufacturers, the wear-resistant thermal resistance has been used nearly 10,000 times a year, and the response is very good. It has the strength of leading peers in many occasions and can be comparable to imported products. , Abrasion resistance, corrosion resistance, high sensitivity, good stability, high accuracy, long service life, etc., is the first choice of temperature measurement protection tubes in power plants, cement plants, chemical smelters and other wear-resistant areas.
Temperature measurement principle:
The principle of abrasion resistance temperature measurement is based on the characteristic that the resistance value of a conductor or semiconductor changes with temperature. It also has many advantages. It can also transmit electrical signals remotely, with high sensitivity, strong stability, interchangeability and accuracy. However, it requires power supply excitation and cannot measure temperature changes instantaneously. Different conductors have different electron densities. Because of their different electron densities, a certain amount of electron diffusion is generated. When they reach a certain equilibrium, the potential formed. The size of the contact potential depends on the material properties of the two different conductors and their contact. Point temperature.
The three-wire system is used to eliminate the measurement error caused by the resistance of the connecting wire. This is because the circuit for measuring thermal resistance is generally an unbalanced bridge. The thermal resistance is a bridge arm resistance of the bridge, and its connecting wire (from the thermal resistance to the central control room) also becomes a part of the bridge arm resistance. This part of the resistance is unknown and changes with the ambient temperature, causing measurement errors. The three-wire system is used to connect one lead to the power supply terminal of the bridge, and the other two to the bridge arm where the thermal resistance is located and the bridge arm adjacent to it, which eliminates the measurement error caused by the line resistance of the wire.
Electrical outlet: M20 × 1.5, NPT1 / 2
Wear head hardness: HRC60-65
Protection level: IP65
Insulation resistance> 100MΩ (at normal temperature)
Test voltage: 500VDC
Connection size: M27 × 2 NPT3 / 4
Accuracy grade: Ⅰ
Measuring range ℃
The non-wear-resistant protective tube is made of 1Cr18Ni9Ti, and the remaining materials are ordered according to the agreement
(1) Thermal resistance temperature measurement system generally consists of thermal resistance, connecting wires and display instruments. You must pay attention to the following two points:
① The graduation number of the thermal resistance and the display instrument must be the same
② In order to eliminate the influence of the resistance change of the connecting wire, a three-wire connection method must be adopted. For details, see Chapter 3 of this article.
(2) Armored thermal resistance Armored thermal resistance is a solid body composed of a combination of temperature sensing elements (resistors), leads, insulation materials, and stainless steel sleeves. Its outer diameter is generally φ1 ~ φ8mm, and the minimum can reach φmm. . Compared with ordinary thermal resistance, it has the following advantages:
①Small volume, no air gap inside, small measurement lag in thermal inertia;
② Good mechanical properties, vibration resistance and impact resistance;
③ Can be bent for easy installation
④ Long service life.
(3) End-face thermal resistance The end-face thermal resistance temperature-sensing element is wound by a specially treated resistance wire, and is closely attached to the end surface of the thermometer. Compared with general axial thermal resistance, it can more accurately and quickly reflect the actual temperature of the measured end face, and is suitable for measuring the end face temperature of the bearing pad and other parts.
(4) Explosion-proof thermal resistance Explosion-proof thermal resistance Through the special structure of the junction box, the explosive mixed gas inside its casing is repaired by sparks or arcs, and the resistance of the resistor must be changed to affect the resistance value. For this reason, it is better to replace the new resistor. If welding repair is used, it can only be used after it has been verified after welding.