主要技术指标精确度等级：1.5 Main technical index of explosion-proof electric contact pressure gauge : Accuracy grade: 1.5
Scale range: 0 ~ 0.16; 0 ~ 0.25; 0 ~ 0.4; 0 ~ 0.6; 0 ~ 1; 0 ~ 1.6; 0 ~ 2.5; 0 ~ 4; 0 ~ 6; 0 ~ 10; 0 ~ 16; 0 ~ 25; 0 to 40; 0 to 60; -0.1 to 0.06; -0.1 to 0.15; -0.1 to 0.3; -0.1 to 0.5; -0.1 to 0.9; -0.1 to 1.5; -0.1 to 2.4MPa
Control mode: The maximum working voltage of the upper and lower limit slow-moving contact switches: DC 220V or AC 380V;
Contact power: 10VA
Working position: Vertical installation. Environmental conditions: -10 to 50 ° C, relative humidity not greater than 80%, and explosive mixtures should belong to Group IIB T4 or lower. The working vibration and the rapid pulsation of the measured medium should not respond to the reliable operation of the meter contacts. influences.
Temperature influence: The displayed value is not greater than 0.4% / 10 ° C, and the set point is not greater than 0.6% / 10 ° C (the use temperature deviates from 20 ± 5 ° C).
Insulation strength: 50Hz sine AC 2000V for one minute Weight: 6kg
· Type of flameproof joint surface and its basic parameters
Shell volume V (L)
Joint surface type
可动部份) Cylinder ( movable part )
Minimum effective length of flameproof joint surface Lmm
Minimum effective length of screw through hole edge to flameproof joint surface L1
Maximum gap or diameter difference of flameproof joint surface Wmm
Surface roughness Ra of flameproof joint surface
Note: For an example of the effective length and gap width of the flameproof joint surface, see the flameproof enclosure structure diagram.
Parts and materials such as flameproof enclosures and pressure guiding systems
Material grade or name
Material grade or name
或ZL-102 ， ZL-101) ( Or ZL-102 , ZL-101)
的观察窗的材质其抗冲击强度不小于4J。 Note: The material of the observation window of the explosion-proof electrical contact pressure gauge has an impact strength of not less than 4J. Once the observation window is damaged, it is not allowed to use.
Explosion-proof electric contact pressure gauge is composed of flameproof enclosure, measuring system, electric contact group, adjusting device and outlet box.
The explosion-proof enclosure of explosion-proof electrical contact pressure gauges has good explosion-proof performance. Therefore, explosion-proof electrical contact pressure gauges can not The explosion pressure generated can effectively prevent the thermal energy generated from spreading smoothly outward, and can only slowly spread outwards in the shell along the small gaps of the flameproof joint surface. At this time, the instantaneous temperature transmitted to the outside of the housing has fallen below the ignition temperature of the explosive gas mixture, so it will not cause an explosion.
的工作原理是基于检测元件(测量系统中的弹簧管)的弹性变形，通过机械传动使之带动电接点组中的触头产生相应的动作(闭合或断开)以使控压系统中的电路得以接通或断开，从而实现自动控制报警和现场指示的目的。 The working principle of the explosion-proof electrical contact pressure gauge is based on the elastic deformation of the detection element (spring tube in the measurement system), and the mechanical contact is used to drive the contacts in the electrical contact group to produce corresponding actions (close or open) to control The circuit in the pressure system can be switched on or off, so as to achieve the purpose of automatic control alarm and field indication.