Fundamental scales automotive: types, description, characteristics

Automobile scales are used everywhere, where goods are transported and counted, in industry and agriculture, in warehouses, customs and large transport hubs. The most popular today are automobile electronic scales, the accuracy of which is much higher than that of their mechanical counterparts. The scales can be equipped with devices for displaying weights of varying degrees of complexity: from simple electronic indicators to complex transmitting devices included in a single network.

Car weights

What is a car scales? These are devices that allow you to weigh the cargo transported by road, without unloading it while doing so. In addition, by means of automobile weights the loads on the roadway are controlled.

By design there are scales automobile platform, mortise and ramp. The ramps, however, are also equipped with platforms of different sizes. Suitable for weighing even the heaviest loaded vehicles such scales are automobile (80 tons, 100 tons or 120 tons, for example).

Mortise scales are equipped with a metal platform installed at ground level. On such scales it is convenient to call in, maneuver on a weight platform and leave it.

Platform autovies can be equipped with a platform of reinforced concrete, consisting of several modules.

Ways of installation of automobile scales

By the method of installation distinguish:

1. Automobile stationary scales are installed on a concrete foundation with a sand-gravel pillow. The choice of the foundation is determined by the maximum load capacity and length of the scales. Arrival is possible on a concrete or metal ramp.

2. Fundamental scales automobile - mobile devices which are stacked on road plates. This way of laying is possible for all types of weights, restrictions exist only for certain climatic zones and certain types of soils.

3. Mortise car scales are mounted on the foundation foundation at the same level as the road surface. With this method of installation, ramps and side rails are not needed, but there must necessarily be a drainage system.

4. Portable weighing scales of simple design and small dimensions are laid directly on the road surface or dense ground.

Fundamental scales

Automobile scales, for which a stationary foundation is not needed, are considered today the most in demand. They are installed, as a rule, in the places of seasonal or temporary work with a small cargo traffic.

Basically non-foundation or sometimes trolley scales are called scales consisting of several modules that are easy to transport, load with a crane and mount without welding.

Modules are mounted on a special metal frame. The frame is installed, as a rule, on reinforced concrete slabs, under which the pillow made of crushed stone or gypsum-sand mixture (GRS) is prepared in the most careful way.

For the entry and exit of the car ramps are provided.

The load on the truck scales (60 tons and 80 tons most common) can be depending on the design of the device from 20 to 100 tons.

Ramps of besfundamentnyh scales

In avtovesaah used ramps of two types. As a rule, the kit includes four metal devices that are attached to the end modules under the car's track.

A cheaper option is a bulk ramp. To the end module for vehicle arrival, a mound of crushed stone and GPS is built, on which road plates, concrete or asphalt are laid. Depending on the conditions and lifetime of such a device, it may be cheaper and more convenient than a metal structure.

Advantages of besfundamentnye scales

Today besfundamentnye scales are in demand on the market. And this is understandable. Firstly, the installation time is saved, because it is not necessary to fill the foundation and wait for weeks until it freezes. Nonfundamental products can be installed in one to two days.

Secondly, automobile scales without foundation, the price for which is much lower than for analogs installed on the foundation, require less expense for installation as well, as there are no costs for materials and labor for pouring concrete base.

Thirdly, they are mobile. They are easy to assemble and disassemble, if necessary, transported from place to place, without using expensive special equipment.

And there is one more advantage that the non-foundation scales differ. Automotive measuring devices can be increased for weighing long trucks or road trains by attaching additional modules to the load platform. The length of the platform can be either 6 m or 24 m.

The longest prefabricated structure is designed for one-time weighing of the road train. For such purposes, we use an automobile scales, 100 tons for which is not the upper limit.

Disadvantages of besfundamentnye scales

The main drawback of this design is the regular monitoring of the installation, for which it is necessary to use a level.

After all, not rigidly installed slabs can skew. And this entails not only low accuracy of measurements, but also a complete failure of strain gauges.

As a rule, in the design of the support frame, special sensor adjustment units are provided, so that the given elevations of the load platform remain unchanged in the event of a slight change in the position of the slabs (subsidence or skewing). And after each setting, an extraordinary check of the car scales must be carried out. And since this procedure should necessarily be carried out by the state metrological service authorities in accordance with state standards, this entails additional costs.

Main characteristics

When choosing vehicles, first of all pay attention to the maximum weighing limit. Briefly, it is designated as "LEL" and means the maximum mass that a specific scales can measure. It is best to choose a balance with a tonnage of 10-20 tons. For example, if the mass of cars with a cargo is mainly 65-70 tons, then the load-carrying capacity, which the car scales should have, is 80 tons.

The second important indicator is the smallest weighing limit. Not everyone is paying attention to him, and in vain. In any case, it should be less than the weight of the lightest empty car, which will be weighed.

The third important indicator is the measurement error, which depends on the LEL, and the price of the verification division.

Calibration allows you to determine the actual values of the metrological characteristics of the car. The balance can be equipped with an external or integrated calibration weight, with automatic calibration.

Components and dimensions of autos

When choosing the balance, you need to take into account the weighing mode (in static or motion) and design features.

Automobile platform scales for static weighing have platforms of sufficiently large dimensions, whereas dynamic weighing is performed, as a rule, on two weighing weighing modules.

To determine the mass of trucks of different sizes, of course, different sizes of the platform are needed. For example, ZIL, KamAZ or GAZ with a body can be weighed on a scale of 6 m, heavy MAZs - 8-12 m long, trucks and cars with a trailer - 18 m. For road trains, the carrying capacity that a car scales should have is 100 tons, length - 24 m.

The load-bearing platform can be reinforced concrete or metal. The first option is intended for quarries and factories of reinforced concrete products, the second is universal.

As transmitters weighing devices are used either electromagnetic, or strain gauges, or devices such as Tuning-Fork. It is very important to pay attention to the protection of the sensors both from moisture and dust, and from vandals. Modern car scales of all manufacturers are equipped with a function that allows you to eliminate the weight of the container, and also equipped with an interface that allows you to connect to a computer network.

Safety in the operation of the balance is provided by standard or reinforced side stops, which protect against accidental exit from the platform.

Select a vendor

Having determined the parameters and technical characteristics, you need to seriously approach the choice of the supplier. Firstly, different manufacturers, with an external similarity in the construction of scales, offer a different package. It is best if the software bundle includes software, electronic components, including cables.

The accompanying documentation should indicate the degree of protection and the temperature conditions for the operation of the equipment.

It is desirable that the supplier not only supply measuring equipment, but also mount it, and subsequently during the entire service life conduct necessary maintenance and repair.

Features of installation beskundamentnyh scales

The accompanying documentation for the truck scales specifies the necessary recommendations for installing road plates as a base under the frame. To install beskundamentnye scales automobile it is possible on plates which are stacked both on road with a gravel covering or soil, and on specially prepared отсыпку.

Package Contents and Prices

The basic set of delivery of scales usually includes:

• Load receptor, which is a set of weighing platform modules;
• Frame for besfundamentnoy installation;
• Outboard metal ramps;
• Limiters of longitudinal and transverse displacements;
• Load cells with support;
  
• Weight converter;
• Connecting, signal, for connecting to a computer cables;
• Blocks for coordinating the characteristics of strain gauges;
• Assembly units and parts;
• software;
• Passport for scales, operating manual, user manual, warranty card;
• A typical construction project.

Differ automobile scales besfundamentnye (the price for them, naturally, also varies) by design, size and configuration.

For example, scales without foundation with a platform, the length of which is 5.9 m, with a carrying capacity of 30 tons, as dust-proof sensors, with an average class of measurement accuracy stand at 400,000, a truck weighing 60 tons with a 12 m platform capacity, more than 680,000 , And calculated for 100 tons with a platform length of 24 m - 1.2 million rubles.

For weighing, weighing is a priority. Today, manufacturers offer a variety of automotive scales for a wide range of tasks in different areas of industry and agriculture, in different price categories.