Memo: designed for metallurgical steel, foundry and other industries supporting the use of the largest weighing: 240T First, an overview of the automatic lifting objects weighing scales as an effective road equipment, metallurgy, chemical industry plays an important effect. The factory was first introduced with the QS-M-type fish back bridge sensor and GG-R railway scale sensor driving scale transformation program, the user has won critical acclaim. After ten years of transformation practice, driving the transformation of electronic scales factory application level, there has been new developments and breakthroughs, according to the different structures and application traffic, forming a series of driving electronic scales, is easy for users to fully understand the factory Driving electronic crane scale features, the correct selection, we wrote this manual for reference. Driving the electronic scale is based on the original lane, through technological innovation, the installation of the weighing device and realized it was not just weighed hanging objects, but also can weigh wireless data transmission; multi-lane electronic scales data acquisition circuit; computer weighing data traffic management; traffic data management system with electronic scale enterprise information management systems networking and other new features. Driving electronic scales consisting see diagram 1; wireless transmission driving electronic scales consisting see diagram 2. In order to achieve the best effect of reconstruction, in the transformation process of driving electronic scales to solve the traffic and use requirements in accordance with technical issues the following three areas: 1 Select scale structure programs; 2 weighing select the sensor structure; 3. Choose weighing instruments and wireless transmission systems, especially weighing instruments robustness. Second, the scope of the traffic lane scales electronic scales and electronic hook scale can be used to measure lifting heavy objects on the road, under normal circumstances, the electronic hook scale high precision, without installation, low price, is the preferred measure of traffic . Driving scales typically used in crane scales can not be used on the measurement accuracy is not high places, there are: a high-temperature environment: For larger tonnage lifting the ladle; 2 not hanging crane scale occasions: eg driving Grab; 3 lifting tonnage particularly big occasions: If more than 50 tons of traffic, then a sharp rise in the cost of crane scales, security decreased, while driving from the relationship between price and weight scale is not large, better security , because of cost and safety considerations can also be used vehicle scales. Third, the scale structure depending on the traffic structure and measurement of performance to be achieved, should take a different program, the following forms: (1) Measurement of the program will be fixed pulley pulley scheduled at both ends with two side panels linked together produced in a special force transmission shaft, the shaft ends of the pressure force transmission is mounted on the car platform, the two load sensors, this structure can ensure the accuracy of the level of 0.5% FS. Feature of this structure is:. A lane does not change the basic structure, power transmission shaft and two side panels considered sufficient safety factor in the design, coupled with the process and strict quality inspection, with reliable safety performance ; b load cell mounted on road car platform, with better security conditions, the sensor can be installed to ensure flatness, levelness, to obtain high accuracy, reliability, good performance measurement;.. c thermal sensor treatment more convenient, can be used to require high temperature applications such as lifting the ladle. . d All installation work on the transformation of the car platform, the working conditions are good, installation and future maintenance and repair work is relatively easy;. e components are needed to transform the organization of production in the factory, with a good product sex, work less and users of the site, spare parts guaranteed beneficial application. This scale structure is the most common form. Before driving scale transformation Our users need to provide the following technical data (or send personnel from the factory site mapping): trolley General Plan; fixed pulley Photos; fixed pulley shaft parts diagram. (2) using dynamic rail track scale load cell of the program is on the road car track, select the appropriate location, truncated section of the original track, on behalf of the rail-mounted sensors, when the car through the track sensor, which automatically called dynamic weight measurement. Conventional rail weighing mostly static, because the actual operation is difficult to accurately stop the traffic at the specified location, so the value is not high traffic use, limiting its use. The factory is now excellent dynamic precision weighing technology automatically in traffic movement, without any impact on the operation of the driver and vehicle performance, completely changed the scope to adapt in this way. This structure is characterized by: a transformation of the easiest parts of the car and lifting mechanism without any changes; b can be overcome due to the location of the hook height, weighing errors caused by the length of the rope; c high measurement accuracy, a single .. measurement of better than 1%, total accuracy of better than 0.5%;. d sensor signal cable car with a small motor supply cables can be routed separately to reduce the interference caused by the motor start and stop frequently; e weighing instruments with dynamic weighing and said. re-hold function, when weighing the end, after the car left the sensor location, has been displayed on a monitor still weighing results, weighing only until the next update, while automatically recording and printing; f using orbital sensor structure. The disadvantages are: the need to ensure that each car is measured through the measurement region, which limits its use to a certain extent. These two structural forms, is the main form of structural transformation journey Our electronic scales, as well as some forms, but also make a brief introduction. 3 Install the axle load cell equilibrium. This structural transformation is relatively simple, but due to the force ratio, low performance measurement stability and accuracy in the measurement accuracy requirements so only large tonnage lower or driving, the use of other methods when the transformation is really difficult to choose this solution. After the conversion can reach 1% F? Precision S so. With this structure, the user should consult the factory to provide the following technical data: car total figure; gimbal assembly drawings; gimbal axis parts diagram. 4 Increase platform scale structure based on the structure of the processing of a trolley platform scales, the original small car winch drum, fixed pulley block, so the motor to move the platform scales, platform scales and then installed in a small car that the entire upgrade institutions over the small car platform scales. This transformation of large structures, the height of the car after the transformation increased the number to be restricted plant and lifting equipment, but higher weighing accuracy, after the transformation to achieve 0.2% accuracy. With this structure, the user should consult the factory to provide the following technical data: car assembly diagrams; trolley component assembly drawing. 5 mounted directly on the two ends of the original pulley shaft sensor transformation method is to remove the original U-shaped bracket, welded two sensors installed on a small platform, as the sensor mounting base, installed after the sensor, the fixed pulley shaft direct pressure on the sensor, fixed pulley shaft at both ends to have enough space. This structure should be modified in the field, due to the conditions, the quality of the sensor mounting base is difficult to guarantee the level of degree, affect accuracy, especially for future maintenance, repair very difficult, only users in the transformation journey to adopt such programs. Fourth, the traffic load cell weighing scales are measured in the process of lifting weights, because driving vertical and horizontal direction of travel, heavy sway, bound to the sensor generates a lateral impact. According to this use characteristics and requirements of the sensor is measured not only have high performance, but also have the ability to very good resistance to lateral impact forces. Clamped double shear beam load cell bridge weighing only high accuracy, but also has good resistance to eccentric force, lateral force performance (insensitive to transverse forces) and very easy to install structures, especially suitable for driving electronic application on the scale, the factory's QS-M-type sensor and GG-R sensor is a structure in which QS-M-type sensors are suitable for power transmission shaft structure forms, GG-R model is a rail-mounted sensor. QS-M-type load cell loading site designed as a "fish back type" structure. As the driving force transmission through electronic scale sensor shaft loading, loading parts generally made of U-shaped, so that the force transmission shaft and the sensor is line contact, due to the installation and loading process is difficult to maintain the required level sensor is installed, the loading point deviation After the force axis of the sensor, the sensor is moved along the outside of the impact of the use of precision scales, a "fish-back" Load structure allows power transmission between the shaft and the sensor into the line contact point contact, and not because of level of variation between the sensor caused by the loading point to the outside of the sensor offset, ensure the accuracy and stability of the driving electronic scales. GG-R-type rail load cell sensor uses the bridge beam structure, and the corresponding light rail, heavy rail, crane rail and other rail ends have the same height and contour, the sensor can be directly installed in series between the rails, the composition axis measurement, bogie measurement, measurement vehicle, rail scale or crane scales, crane overload alarms. With simple installation, low cost system, easy to use, high accuracy. Five, weighing instruments weighing display controller selects the factory XK3196 dedicated weighing instruments, it has the following characteristics: (1) has the extraordinary power of the anti-interference ability. When the supply voltage is a substantial change in an instant or even short interruptions occur when the meter is still working properly, which is particularly important for the supply of rail traffic scales; according to user needs, can also be configured AC, DC-based instruments. (2) using a variety of digital filtering methods, the A / D conversion results are processed to make the instrument both in the case of dynamic and stable weighing result is displayed, but also has a faster response time when rapid change; 3 For rail weighing program, you must use dynamic weighing instruments; 4 if the weighing data to be displayed in the control room floor, you should configure the wireless digital instrument; wireless transmission distance of 100-300 meters optional, special requirements up to several kilometers. 5 This instrument can be equipped with built-in mini printer or an external 24-pin wide-line printer, with strong statistical and report processing. By choosing different grades of instrumentation systems, can form different functions driving scale applications. VI. Technical performance ◎ weighing accuracy: soil O. 5% FS ◎ weighing Tonnage: 100t-240t ◎ Division value: 20kg, 50kg, 100kg ◎ allowed overload: 200% Max ◎ Ultimate overload: 300% Max ◎ allow partial load: 100% Max ◎ Operating Temperature Range: -40 ℃ ~ +350 ℃ ladle scales Specifications: Range ABCDEFG 20T 365 100 120 95 260 312 48 50T 450 120 130 105 298 398 68 100T 500 140 143 118 336 444 80 150T 560 160 158 133 372 500 94 200T 620 180 175 150 400,560,114 range HIJKLMN 20T 64 38 76 90 Ф18 20 M16 × 20 50T 75 40 80 110 Ф26 25.5 M20 × 30 100T 90 44 90 130 Ф32 32 M24 × 36 150T 102 44 90 150 Ф32 32 M24 × 36 200T 110 44 90 160 Ф32 32 M24 × 36 ladle scales specific parameters: Sensitivity 1.5 ± 0.1mv / v nonlinearity ± 0.05 ~ ± 0.1% FS Hysteresis ± 0.05 ~ ± 0.1% FS repeatability of 0.03 ~ 0.05% FS Creep ± 0.05 ~ ± 0.1% FS / 30min creep recovery ± 0.05 ~ ± 0.1% FS/30min Zero 2% FS zero temperature coefficient of ± 0.02% FS/10 ℃ Rated output temperature coefficient ± 0.02% FS/10 ℃ Output resistance 700Ω Insulation resistance ≥ 5000MΩ for the bridge voltage 5 ~ 15V allowable temperature range of -30 ~ +60 ℃ allows overload 130% FS Protection class IP67 Connection type: red (+) Yellow (-) Output: blue (+) White (-)