SU549071A3 - Apparatus for cooling the mold in a centrifugal casting machine of cast iron pipes - Google Patents

Description

one

The invention relates to the field of foundry, in particular to machines for the centrifugal casting of cast iron pipes.

A device for cooling a mold in a centrifugal casting machine of cast iron pipes is known, which includes cooling water spray headers arranged in parallel along the entire length of the mold, and supply lines: And cooling water 1.

A disadvantage of the known device is that it does not provide uniform cooling and improve the quality of castings.

The proposed device is characterized in that it comprises a guiding rod located parallel to the mold, on which the slider is mounted so that it can move, a carrier element for additional local spraying of cooling water. The element for additional local spraying is connected to the cooling water supply pipe through the flexible pipe, which is designed to lengthen depending on the position of the slider on its guide rod, the flexible pipe being wound helically and located on a rod parallel to the guide

square rod. The cooling water supply line is equipped with a valve for simultaneously supplying cooling water to the collectors and to the elements for additional spraying.

This eliminates the noted disadvantages.

FIG. 1 and shows a general view of a centrifugal casting mask containing a cooling device; in fig. 2 is a section along A-A in FIG. 1 (device for cooling is depicted in the working position); on fng. 3 - the same (device for cooling is depicted in the inoperative position); in fig.

4 is a cross-sectional view of a square guide rod.

According to the invention, the centrifugal casting machine comprises a movable carriage moving between the chute 1

and not shown, in the drawing, a extractor of molded pipes located at the opposite end of the moving path of the movable

carts.

The mobile carriage comprises a housing 2, inside of which a mold 3 is located. The housing 2 has a lower platform 4, a vaulted ceiling 5 connected on both sides with the platform 4 by side partitions 6. One

These partitions have removable panels that allow opening the side window 7 along the entire length of the housing (Fig. 3). The form lies on the rolls 8, driven by the engine; 9. The whole installation can be moved along the rails 10 using a pneumatic power cylinder ( not shown). Three collectors AND for spraying water, the length of which corresponds to the length of the mold 3, are arranged longitudinally in the housing 2 close to the outer surface of the mold. Two of these reservoirs are located above the form on both sides of a vertical plane passing along the longitudinal axis of the form, and the third is under the form in this vertical plane. The collectors 11 contain, at their ends, pipelines 12 for supplying and discharging water, connected with the possibility of being removed by means of flanges 13, with pipes 14, passing through the wall of the corrus and connected to the pipeline for supplying water.

The housing 2 comprises in its lower part a longitudinal guide rod 15 located longitudinally near the side wall, parallel to the longitudinal axis of the mold and the collectors for spraying. The guide rod 15 has, for example, a square cross-section and can rotate around its axis in the supporting end supports 16. It can be held in different angular positions with the aid of a pin. or a pin 17 passing through the sleeve 18, fastened at each end of the rod, and the fixed plate 19, rigidly mounted on the platform (Fig. 4). The installation includes a tongue 17, a sleeve 18 and a plate 19 near each base 16; each sleeve 18 has at least two diametral holes 20 for different angular orientation of the pin 17 so as to be able to impart at least two possible directions for the guide rod 15.

Two slide blocks 21 are located on the guide rod 15, having an internal cross section that is the same as the square rod itself. Each slider 21 has a rigid riser pipe 22, provided at its upper end with an element 23 for additional local water spraying. This element 23 is formed by a short collector, directed parallel to the longitudinal axis of the form 3, and contains several spray nozzles 24. In the working position shown in FIG. 2, this collector is slightly above the longitudinal axis of the mold and near the surface of the latter, with the nozzles 24 directed toward this surface.

A rigidly bent pipe 25 comes out of the rigid conduit 22 for connection with a flexible conduit 26, wound up in several turns 27, which are led to the upper wall of the casing by means of the rod 28.

The flexible pipe 26 is connected to a rigid pipe 25 through a special quick-release coupling. The flexible pipe 26 passes through the upper wall of the casing and is connected to the best branch pipe of the crank OLE 29 to control the flow. This speck 29 is mounted on the tee-shaped gate 30, the main channel of which is connected to the main water supply pipe 31.

The pipes for supplying water to the spray headers 11 are also connected to this main conduit 31 (FIG. 2). Water distribution is common to main reservoirs 11 and for additional

water spray elements 23 and is controlled by the same valve installed on the main water supply pipe 31 and not shown in the drawings. The opening and closing of taps installed on the main pipe 31, influences the flow, the cessation of the water supply to the collectors II and the additional elements 23 at the same time, the latter being further controlled by the tap 29.

The bottom platform 4 of the housing 2 is provided with short connections 32 for draining cooling water.

The operation of the described device is carried out as follows.

If, for example, excessively red areas are noticed on newly extracted pipes, then one or two abnormally hot areas are noted on form 3 equipped or not supplied with refractory

fzterovkoy; thereafter, the sliders 21 are moved along the guide rod until the additional spray elements are opposite these sections. During these movements, flexible turns 27

are brought together or diverted to move apart or shrink to the desired length.

Thus, form 3 is cooled not only through the collectors 11, but also through additional elements 23, which provide local supply of additional water and, consequently, more intensive cooling of excessively hot areas. Thus, the cast iron poured into the mold hardens with a homogeneous structure.

After the removal of the side panels of the housing, the quick-detachable pins 33 can be removed. After removing the plugs 17, the guide rod 15 with the branch pipes carrying the spraying collectors can be turned to the fully retracted position (Fig. 3), in which the branch pipes rest on the edge of the window 7 of the case. In this non-working position of the device, the side window is open and after

removing the spray manifolds provides access to extract the mold through the window.

If to replace the form 3 with the form of a larger diameter, then the stopper t rod 15 and its

sleeve 18 in the position of the collector, a little

the farthest from the longitudinal axis of the form, the brow position shown in FIG. 2, using the other locking hole of the sleeves 18. In this way, the rod 16, the sleeves 18 and the locking pins 17 allow you to adjust the distance of the spray form from the collectors depending on the diameter of the form.

As an alternative, two guide rods 15 can be provided on both sides of the mold 6, with the second unit for additional spraying being identical to the first unit shown in FIG. 2, and is symmetric with respect to the last one. Both units are powered through the same flexible conduit 26, which ends, for example, with a tubular clamp.

Claims (5)

1. An apparatus for cooling a mold in a centrifugal casting machine of cast iron pipes, including cooling water spray headers arranged parallel to the entire length of the mold, and cooling water supply pipelines, characterized in that in order to ensure uniform cooling and improve the quality of castings core, located parallel to the truss, on which the slider is mounted and relocated, the carrier element for additional local spraying of the cooling s. 2. The device according to claim 1, characterized in that the element for additional local spraying is connected to the pipeline for supplying cooling water through a flexible pipe that is made with the possibility of elongation depending on lolol: the slider on its own and is sterile . d. Device on PP. 1 and 2, characterized in that the flexible pipe is wound helically and located on a rod parallel to the guide rod. 4. Device on PP. 1-3, characterized by the fact that the cooling water supply pipeline is provided with a valve m for simultaneously supplying cooling water to the collectors and to the elements for additional disintegration. 5. Device on PP. 1--4, characterized in that the guide rod has square section. Sources of information taken into account in the examination 1. Yudin S. B., et al. “Centrifugal casting, M.,“ Mashinostroenie, 1972, p. 171 (prototype). 32 15 11 4 Figure 1 V J