The UDZ type intelligent electric contact water level meter is composed of a measuring cylinder and a secondary meter. The installation position of the electric contact on the measuring cylinder corresponds to the light-emitting diode on the secondary meter, and the secondary meter displays the water level value in the control room. The secondary meter adopts single chip microcomputer and integrated circuit, which has the ability of intelligent analysis and judgment. When the water level is abnormal, it can perform sound and light alarm and interlock control. This type of instrument has the advantages of stable performance, reliable operation and convenient maintenance. It is widely used in boiler drums, water tanks and other water containers with different pressures and temperatures.
Due to the great difference in electrical conductivity between water and steam, taking the boiler drum of a power plant as an example, the general water resistance is tens of KΩ, and the steam resistance is more than 1MΩ. The electrical signal is sent to the secondary meter, and the multi-way switch circuit in the secondary meter gates the resistance value information of each electrical contact point in time, converts it into a voltage signal and sends it to the A/D converter, where it becomes a digital quantity, which is sampled by the single-chip microcomputer. Afterwards, the corresponding resistance value is calculated and compared with the preset critical value. The contacts larger than the critical value are in the steam, and the CPU makes the LED display red through the I/O circuit; the contacts smaller than the critical value are in water, and then display green. The tube directly displays the water level value.
UDZ type intelligent electric contact water level gauge has a variety of electrodes for users to choose from. Users can choose the appropriate electrode type according to the specific working conditions on site. Among them, the TGZM104 cone surface sealing electrode is our company's characteristic product. The electrode contact material is made of stainless steel, and the electrode seat material is made of cemented carbide, which has the advantages of high strength, wear resistance, high temperature resistance and corrosion resistance, and its sealing structure can effectively Prevent the occurrence of electrode scaling, corrosion, leakage, etc., and improve the service life of the electrode.
UDZ type intelligent electric contact water level gauge is equipped with functions such as sound and light alarm, interlock control and heat tracing. Users can choose the corresponding configuration according to on-site needs. According to the on-site working conditions, the user can set multi-point water level alarm on the secondary meter. When the water level is abnormal, the secondary meter will issue an audible and visual alarm to indicate that the water level is abnormal, and the interlocking control can be achieved by connecting to the on-site control system.
UDZ type intelligent electric contact water level gauge has two types of heat tracing functions: steam tracing and electric tracing. Steam tracing is to use the saturated steam in the steam drum to heat the measuring cylinder. At the same time, it is equipped with a condensing device, so that the water sample in the measuring cylinder is pure water with the same temperature as the steam drum, which improves the service life of the electrode and the measurement accuracy. Electric heat tracing is to use a ceramic heater to heat the measuring cylinder, so that the temperature in the measuring cylinder is consistent with the temperature in the steam drum, and the measurement accuracy is higher.
Selection parameter table
|UDZ-191A||Product number||Number Description|
|-4.0||Design pressure: 4.0MPa|
|-6.4||Design pressure: 4MPa|
|-12||Design pressure: 2MPa|
|-16||Design pressure: 6MPa|
|-22||Design pressure: 2MPa|
|B2||Electric heat tracing|
|/S||Graphite Sealed Electrode|
|/Z||Cone Seal Electrode|
|Center distance||670mm or according to user requirements.|
|Material||20G/SA106/304/316 or configured according to user needs.|
|Number of measuring points (N)||2≤N≤33|
|Measuring point location||0, ±15, ±30, ±5075, ±100, ±150, ±200, ±250, ±300 or according to user requirements|
|Secondary meter working voltage||220V±22V、50Hz|
|Secondary table working environment||-10～45℃, relative humidity≤85%|
|Secondary meter output contact capacity||220V、3A|
|Secondary meter power||10W|
|Connection method||Welded or flanged connection|
UDZ type intelligent electric contact water level gauge Design pressure: 6.4MPa, electric heat tracing type, graphite sealed electrode