RU114894U1 - STAND FOR RESEARCH OF GATE SYSTEMS - Google Patents

Abstract

Stand for the study of ring gating systems, including a gating cup, a riser, an adapter, a composite manifold in the form of replaceable modules with feeders and connecting pipes, piezometers in the riser and a manifold, characterized in that it additionally contains tees, in the holes in which at an angle of 90 ° connecting tubes are installed at one end, holes are made in the adapter with the ability to distribute the flow to three sides, and to close the holes in the adapter and tees, the stand is equipped with plugs, and the connection of all elements to each other is made according to fit, without using threads and gaskets.

Description

The utility model relates to foundry, in particular, to stands for the study of gate systems.

A well-known stand for the study of gate systems (BV Rabinovich, "Introduction to foundry hydraulics." - M .: Mechanical Engineering, 1966. - P.335). The stand consists of a sprue bowl, riser, collector and feeders. All elements of the stand are made of transparent plastic. The riser has a circular cross section and is made tapering downward. The collector has a trapezoidal cross section and a flat cover. Trapezoidal cross section feeders are cut in the collector.

The disadvantage of the stand is that it can be used to study only one simple sprue system - L-shaped - and can not be used in the study of complex sprue systems, such as ring, branched, combined and cross. The dimensions of the collector and feeders can only be changed by making a new model of the gate system. It is impossible to produce collector sections of different internal diameters. In addition, in this gating system, the pressure of the liquid is not measured in different sections of the system.

There is also a stand for research of gate systems (patent for utility model No. 92817 dated 12/08/2009, "Stand for research of gate systems"). The stand consists of a sprue bowl, riser, adapter, composite manifold in the form of interchangeable modules with feeders and connecting tubes, piezometers in the riser and collector. The riser is made of circular cross section. The number of feeders can vary from 1 to 20, and the distance between them can be changed by drowning intermediate feeders. Of the standard elements - replaceable modules with feeders and connecting tubes - it is possible to assemble, in addition to the L-shaped, complex gating systems, such as branched, combined and cross.

The disadvantage of the stand is that it cannot be used in the study of such a complex system as a ring. Such gating systems cannot be calculated, since the Bernoulli equation was derived for a flow with a constant flow rate. And in the ring gating system, the flow is divided at the outlet of the riser into the collector (often into unequal parts) and the flow is distributed to the feeders. Moreover, in some feeders the flow of fluid occurs from two opposite sides.

Signs of a well-known stand, which are common with the signs of the proposed stand, are a sprue bowl, a riser, an adapter, a composite collector in the form of replaceable modules with feeders and connecting tubes, piezometers in a riser and a collector.

The problem the proposed utility model is aimed at solving is creating a stand allowing to explore the ring gating system.

The problem is solved due to the fact that the well-known stand for the study of gate systems, including the gate cup, riser, adapter, composite manifold in the form of replaceable modules with feeders and connecting tubes, piezometers in the riser and collector, additionally contains tees, in the openings in which at an angle of 90 °, connecting tubes are installed at one end, holes are made in the adapter with the possibility of flow distribution on 3 sides, for closing the holes in the adapter and tees, the stand is equipped with plugs, and all the elements between each other were made due to landings, without the use of threads and gaskets.

Signs of the proposed technical solution, which are distinguishing from the prototype, - the stand additionally contains tees, in the holes in which the connecting tubes are installed at one end of the pipe at 90 ° angles, holes are made in the adapter with the possibility of flow distribution on 3 sides, for closing the holes in the adapter and tees it is equipped with plugs, and the connection of all the elements to each other is made through landings, without the use of threads and gaskets.

Figure 1 presents a diagram of the proposed stand for the study of gate systems, figure 2, 3, 4, 5 and 6 are drawings of a riser (consisting of three parts), an adapter, a connecting tube, a replaceable collector-feeder module, tee, in Fig. .7 - photograph of the manufactured stand during the work of 7 feeders. On Fig shows the stand of figure 1 with the designation of numbers of feeders, sections of feeders, sections of the collector (the installation site of the piezometers). Figure 9 shows a diagram of the stand for the simultaneous study of 2 ring gating systems, figure 10 is a diagram of the stand for the simultaneous study of ring and L-shaped gate systems.

The stand (figure 1) consists of a sprue bowl 1, a riser 2, an adapter 3, connecting tubes 4, replaceable modules 5 collector-feeder, tees 6, piezometers 7. To drain excess fluid in the sprue bowl 1, a slot 8. is cut to close the holes in adapter 3 and tees 6, the stand is equipped with plugs 9. Tees 6 rotate the fluid flow by 90 °. The riser 2 is made prefabricated, consisting of two or more parts, which allows you to change its height. Piezometers 7 are installed in the riser 2 and in the connecting tubes 4. All elements of the stand (except glass piezometers) are made of steel. The connection of the elements of the stand made due to landings, without thread and gaskets. In the adapter 3, replaceable modules 5 and tees 6, the grooves for the connecting tubes 4 are carried out by sweep, and the outer diameter of the connecting tubes 4 is designed to obtain a sliding fit of the connection of the connecting tube 4 with the adapter 3, with the replaceable module 5 and the tee 6, preventing water leakage. Elements of the stand are easy to manufacture, and assembly of the stand does not cause difficulties. The pressure in the system is the H-vertical distance from the metal level in the sprue bowl 1 to the longitudinal axes of the connecting tubes 4, plug-in modules 5 and tees 6 - maintained constant by continuously adding liquid to the bowl 1 and draining its excess through the gap 8. The distance from the riser to the first working feeder (Fig. 1) and the distance between the feeders can be changed without including any intermediate feeders.

A prototype was made - stand (Fig.7). The riser 2 consists of three parts, and the inner diameter of the riser was 24.08 mm. The inner diameter of the collectors of removable modules 5 was equal to 16.03 mm The inner diameter of the feeders of the replaceable modules 5 is 9.03 mm. The inner diameter of the bowl 1 is 272 mm, and the pressure in the H system is 363 mm and is kept constant.

All elements of the stand (except for glass piezometers 7) are made of steel. In the riser 2 and in the connecting tubes 4 there are installed piezometers 7 — glass tubes 370 mm long with an inner diameter of 5 mm, and the piezometers 7 installed in the riser 2 are bent by 90 °.

The stand can be assembled from exchangeable modules 5 collector-feeder with different diameters of the collectors, or with different diameters of the feeders, or with different diameters of the collectors and feeders.

Stand for the study of gate systems works as follows. The system is filled with water, the required number of feeders is opened, the height (head) N of the liquid column in the riser piezometers and connecting tubes is measured with a metal ruler and the volume W of each replaceable fluid module poured from the feeder into a separate container for a certain time τ is determined. Then determine the water velocity v in the feeder of each plug-in module according to the formula: v = W / τ. Then calculate the flow rate of water in the feeder according to the formula: Q = vS, where S is the cross-sectional area of the feeder, m ² . The water flow in the entire system is determined by summing the water flow in all working feeders. The results of the experiments are shown in the table. As can be seen, it was possible to investigate the operation of the ring gating system with a different number of feeders, to measure the speeds v, flow rates Q and pressure H of the liquid. That is, the goal of creating a utility model has been achieved.

Thanks to the obtained experimental results, it was possible to use the Bernoulli equation in the calculations of ring gating systems that were previously not amenable to calculation.

Working feeders v ₁₇ , m / s v ₁₈ , m / s v ₁₉ , m / s v ₂₀ , m / s H ₆ , m H ₇ , m H ₈ , m H ₁₀ m Q, cm ³ / s IV 2.02 0.334 0.314 129.63 III 2.01 0.324 0.314 128.71 III, IV 1.77 1.79 0.259 0.239 0.252 227.64 III-V 1,54 1,58 0,207 0.189 0.199 297.56 II, III 1.75 1.77 0.244 0.234 0.252 225.55 I-III 1.45 1,56 1,53 0.164 0.187 0.194 290.60 I-III 0.96 1.06 1.14 0,084 0,097 0.107 0.102 404.07 V-vii I-VII 0.83 0.95 1.00 1,02 0.059 0,084 0,084 0,089 422.62

Claims (1)

A stand for the study of ring gating systems, including a sprue bowl, riser, adapter, a composite collector in the form of interchangeable modules with feeders and connecting tubes, piezometers in the riser and collector, characterized in that it additionally contains tees, in the holes in which 90 ° connecting tubes are installed at one end, holes are made in the adapter with the possibility of flow distribution on three sides, and for closing the holes in the adapter and tees, the stand is equipped with plugs, and the connection of all elements Comrade among themselves made on landing, without the use of threads and gaskets.