SU561090A1 - Conveyor scales - Google Patents

Description

one

The invention relates to the field of weighing technology, in particular to conveyor weights for bulk materials fed to a continuously moving belt.

Belt scales l are known in which the upper branch of the endless transport of the ruy belt moves along the weighing platform, which is a link of the four-link mechanism, the other links of which create a pre-load on the weight sensor. However, the weighing accuracy is low in these scales.

It is also known device 2 containing a conveyor belt, the upper branch of which moves along a weighing device made in the form of a four-link mechanism consisting of a balanced platform that receives the weight of material, supported by L-shaped levers, the vertical arms of which are pivotally connected to each other and with the sensor weight. However, the arrangement of the horizontal arms of the Shaped arms in the direction of the belt movement causes additional loading of the sensor from the effect of the friction force when the upper branch of the belt moves along the weight-sensing material

balanced plotsadke, because of the force of friction occurs torque, acting on G-razraznye levers relative to their axes swing. In addition, at the specified location of the horizontal arms of the L-shaped levers, access to the weight sensor is difficult, since it is located in the middle of the weight gauge under

IQ longitudinal axis of the upper branch of the tape.

The purpose of the invention is to improve the accuracy of weighing and ease of maintenance of belt scales.

This is achieved by the fact that the horizontal 6 arms of the L-shaped levers are located across the direction of movement of the belt.

The balance contains a carrier frame 1, a drive 2 and a guide 3 drums, a transfer belt 4, moving along the load receiving 5 and dropping 6 plates. Between platforms 5 and 6 with fixed gaps, a platform 7 is mounted, weaving a shivgishch, resting on

25 oscillating relative to the support hinges 8 L-shaped levers 9 of the four-stage mechanism plane-parallel displacement, connected to the weight sensor 10 by means of axes 11 and rigid P

30 tons 12. The horizontal arms of the levers 9 are located across the direction of movement of the lelta 4, on the free ends of which the balanced weights are mounted .13. Scales work as follows. A moving material enters the moving belt 4 in the area of the platform 5, which is transported to the platform 7. Under the influence of the mass of the material, the plane-parallel platform 7 is lowered and the weight sensor 10 is loaded. When the loaded branch of the belt 4 moves along the weighing platform 7, the resulting frictional force is directed along the axes swinging the L-shaped levers 9. It is perceived by the hinges of 8 swing axes of the L-shaped levers and is not transmitted to the weight sensor 10. In addition, the arrangement of the horizontal arms of the levers 9 across the direction of movement flax you 4 causes transverse location with voltage and rigid rod 12. As a consequence, the weight sensor 9 is disposed on the side of Vesoizmeritel outside weighing area than obuslavlivaets egs- easy access and service. Formula of the invention Conveyor scales containing an endless conveyor belt, the upper branch of which moves along a weighing device made in the form of a four-stage mechanism consisting of a receptive weight of material of a balanced platform, supported by L-shaped levers, the vertical arms of which are articulated between themselves and with the sensor weights, which are due to the fact that, in order to increase the weighing accuracy and ease of maintenance, the horizontal arms of the L-shaped levers are arranged across the direction dvihkeni tape. Sources of information taken into account in the examination: 1. USSR Author's Certificate No. 322645, cl. G01 G 11 / 04,1970 g. 2. Copyright; USSR certificate No. 236794, cl. G01 G 11 / 02,1967