SU44041A1 - Automatic scales with a rotating drum for weighing liquid bodies - Google Patents

Description

In the proposed automatic scales with a rotating drum for weighing liquid bodies, in order to reduce the jet of liquid by the end of the injection of each individual batch, the valve of the reservoir from which liquid flows into the drum of the scales is articulated with a barbell that carries the end roller on the attached drum wall protrusions.

In FIG. Figure 1 shows a side view of an automatic scale with a rotating drum for excusing liquid bodies; FIG. 2 - front view; FIG. 3 - view from the back.

The rotating drum / dl fluid is made in the form of a cylinder partitioned off by a flat wall 2 (Fig. 1) into two parts and hung on earrings 3 to a double equal arm rocker 4, to the other end of which a string of 5 with weights is suspended. The partition 2 is inclined at some angles to all three planes of the projection, and the angles are chosen so that the common center of gravity of the drum with one half full is above its horizontal axis and shifted to the left from the vertical axis (Fig. 2) so that with this, the pair of forces provided with a certain reserve the rotation of the cup by 18 (f. Buffers выступ protrusions 10 and rods 77 are attached to the side vertical walls of the drum. Eccentric ribs 72 are attached to the cylindrical wall of the drum. Lower ends of earrings 3 swing rods with prisms on the prisms (not shown in the drawing). The openings 7 of the cylindrical wall are equipped with flexible diaphragms J5, which, when the hole is at the top, hang freely inside the drum, not hindering the flow of liquid. thus, the shape of the funnel narrows the opening for the liquid to prevent it from splashing.

On the front link 3 (Fig. 2), a counter 75 is fixed, and on the drum wall, a device holding from rotation, releasing it by the end of weighing of individual portions, described in the author's certificate No. 44042.

The liquid reservoir 19 is provided with an outlet sleeve 20, closed by a lever valve 2 /. There is a small through hole in the valve. On top of the valve is placed a hermetically sealed cylinder d (Fig. 1), which protects the valve from water hammering at the time of its closing. The valve 2 / is suspended from the lever 22 with the weight 37 for adjustment articulated with the rod 25, the lower part of which passes in the guide plate 24 attached to the frame, and ends with the roller 25. On the rod 23 the weights 26 are suspended, which, when the rod moves down alternately rests on the board 24. The sleeve 20 is suspended on the axis 27 of the bucket 28 with a counterweight 29 and a spike 30. To the ear of the bucket is attached on the axis e a rod 5 / with a spring 32, carrying the roller 33 at the bottom, the groove of which is in the plane of the rib 12.

When the balance is shown in the drawing, the valve 21 is open and its partial weight, like the weight of the lever 22 and the bar 23 with the weights 26, is transmitted through the protrusion 10 to the drum of the scales. The roller 33 of the bucket 28 is in the slot between the ribs / 2 and the bucket under the action of the weight 29 has moved aside, freeing the path of the liquid. The shovel 30 of the bucket is pressed against the bottom of the tank J9, not allowing the bucket to move further to the side. The empty drum is raised up to its ultimate upper position; in this case, the buffers 9 are exactly opposite to the buffers 36 attached to the frame and provided with rubber pads and shoes, Christmas trees 40, but do not touch them. Liquid begins to enter into the reservoir / 5 and, without remaining in it, flows through the open sleeve 20 into the hole 7 below the opening 7 of the right side of the drum (Fig. 1). The drum had accumulated so much liquid that the total weight of the entire drum, together with the weight of the lever system of the valve 2 / transferred to it, is equal to the weight of the cup 5 with weights. More than a few kilograms of injected liquid overcome the inertia of the quiescent part of the moving part of the balance and inform the drum / accelerated downward movement. Together with the drum, the rod 23 and the valve 27 move, constricting the passage of fluid. Suddenly a push causes the drum to stop for one moment. This is the first gear 26 leaned on the board 24, and rubbed its weight on the drum / acts as a push from below. But fluid and its weight continuously flow from reservoir 19, replacing the lost weight of the first kettlebell 26, again giving the drum 7 an accelerated downward movement to the next jolt - and so on, until, with the latter, the valve 21 does not have

in their nest. The jolts caused by the weights 26 and the flap 2 / are smoothed by the inertia stock of the entire moving scale system, and as a result, the drum moves down / down smoothly and evenly. The latter is achieved by adjusting the position of the weight 37 on the lever 22 and the weight and quantity of the weights 26, as well as their placement on the rod 23, and here it is necessary to orient at the maximum rate of flow of liquid into the reservoir 19. After the valve 2 is seated / into the slot, the drum movement / almost stops, since the access to it of the fluid is reduced to the amount flowing through the hole c in the valve 2 /.

At this moment in the drum there is not yet a full portion of the liquid and the scales are not yet in equilibrium, which occurs as the liquid flows through hole c. At the same time, the drum 7 is already lowered so that the buffers 36 cannot impede the movement of the buffers 9.

Having created a force from the force applied in the shifted center of the drum body, a pair of forces acts on the aforementioned device which frees the drum and the latter overturns, turning around its axis half a turn.

When tilting, the drum rises up simultaneously, partly due to the movement of the center of gravity and partly due to the loss of weight from pouring a part of the liquid through the skewed hole 7, and takes up its original upper polish even before the buffers 9 have time to hit the rubber buffers 36. Further turning the drum is prevented by the latch 40 in the buffers 36.

From the very beginning of the turn of the drum, the rib 72 captures the roller 33 of the bucket 28 and moves it under the opening of the sleeve 20, supporting the bucket 28 in this position during the entire rotation of the drill 1, and only at the end of the turn does the roller 33, jumping off the rib 72, allow the bucket is in its original position. The correct position of the bucket during the overturning of the drum is ensured by the girder 29, which abuts against the bottom of the tank 19,

and a spring 32 and a rod .5 /, the action of which is clear from the drawing (FIG. 2). The bucket 28 serves as a temporary receptacle for the fluid flowing during the entire time of the drum tipping from the reservoir 19 through the valve hole, as well as due to possible leaks closing the latter. After the bucket is rotated to its original position, the liquid accumulated in it is poured into the hole of the half of the drum which has become under the sleeve 20. During the entire drum tipping time, the opening of sleeve 20 remains closed with valve 2 / and only at the end of tipping, when the opening next to the filling of half of the drum has already stood against sleeve 20, valve 2 /, together with the entire lever system, rises 25 of the inclined plane of the protrusion 70. Thus, the balance of the steel is in its original position with the only difference that the left half of the drum is now under the sleeve 20 (Fig. 1}, and the weighed out poured out at the same time When the drum overturns, the fluid in the tube 8 installed in the drum can be poured into a special receiver and, as an average sample of the weighed fluid, flows for analysis. After the tube 8 is emptied from the fluid, the tube 8 enters the empty drum half the air at the place of liquid being removed from the drum, which contributes to the smooth, without jolts, pouring out the latter. The further effect of the balance is identical to that described.

As can be seen from the description, the scales act continuously: when liquid flows into one half of the drum, at the same time the other half is emptied. Slowing fluid intake occurs only during the addition to the full portion of the liquid to be weighed and the tilting of the drum, which is a small part of the entire weighing period. In view of the weighing of the scales with the counter always equal by weight

scales can serve as an ordinary rev counter. The disadvantage of this scale design is, as in other autoweights (for example, autoweights for beets), as well as in all automatically applicable liquid measures, that the weights do not take into account the weight of the liquid stuck to the cup walls, which is especially true when weighing light liquids For example, syrup and molasses in sugar production can lead to errors if appropriate measures are not taken. As precautionary measures against this phenomenon, we can recommend the following: tare the scales during their normal operation with dampened walls of both halves of the drum and design scales of large sizes so that the weighing does not occur very quickly one after the other, and so there is enough time for a fairly perfect the drain of the main mass of fluid from the walls of the drum. In addition, with a large drum size, the ratio of the area of its walls, as well as the amount of liquid that can stick to them to the total mass of the material being weighed, is in favor of decreasing. When weighing very thick and sticky liquids, such as squeezing molasses, it is possible to use steaming of the emptied half of the drum. In the latter case, when calculating the scales, it is necessary to take into account the time required for steaming.

After the application of the above measures, the accuracy of the weights of this design, even when weighing very thick liquids, will not be lower than the accuracy allowed by the existing designs of automatic weights.

The subject matter of the invention.

Automatic scales with a rotating drum for weighing fluids, characterized by the use of a rod 23 coupled to the valve 2 / weights. 23 bearing supporting weights 26 and supported by its end roller 25 on the projections JO attached to the wall of the drum.