SU734571A1 - High-temperature apparatus for determining refractory materials at tension - Google Patents

Description

The invention relates to the refractory materials industry, and ’and more particularly to devices for testing refractory materials and products. 5

Multiple captures to explosive machines are known, which allow to heat and determine the strength of several samples together (1J.

The drawback of these grips is 10 that the samples in them are mounted coaxially to each other ('' chain ' ¹ ). In this regard, the heating circuit turns out to be very long and practically have to be limited to only 15 2-3 samples.

Closest to the invention is a 'apparatus for determining the tensile strength of refractory materials, comprising a bed, a heating device, active and passive grippers for samples, a loading device with a drive connected by rods with active grippers, and a measuring device (2].

The main disadvantage of this setup is that after breaking each successive sample, a number of additional 30 operations must be performed to prepare the loading of the next sample. Such additional operations include: 'disconnecting the exciter from the thrust of the destroyed sample, it. reversal to the initial operating position, release of the exciter mounting, its rotation to the position above the next sample, connection of the exciter with the draft image. TSA to be loaded, securing the exciter in a new position,

All these operations must be repeated after the destruction of each successive sample. In addition, the circumferential arrangement of the samples is not entirely rational for refractory samples with large shoulders, since the working space of the furnace is not used efficiently enough.

The purpose of the invention is to increase the productivity of the installation.

The goal is achieved in that the traction of the active grippers are equipped with earrings, and the loading device is made in the form of a drum with radially fixed fingers interacting with the earrings.

In FIG. 1 shows a diagram of the proposed installation performed on 10 jointly tested samples; in FIG. 2 - 6 - sections aa, bb, bb, gg and ee in fig. 1 respectively.

Ten patches 1 (Fig. 1) are installed in a common passive capture 2 so that they are parallel to each other and face flat surfaces to each other. Passive capture 2 is suspended on rods 3 to the frame 4 of the installation. The lower heads of all samples are installed in active grippers 5, equipped with rods 6, at the ends of which earrings 7 are mounted. The grips with samples are placed in a heating furnace 8.

Ten fingers 9 are radially mounted on a drum 10 mounted on bearings 11. The free ends of the fingers 9 enter the openings of the corresponding 'earrings 7. In the initial position, the first (on the left in Fig. 1) finger 9 is engaged with its earring 7, t, e , relies on the lower traverse of the earring (see Fig. 2). Each subsequent (from left to right in Fig. 1) finger has an angular displacement relative to the adjacent one by the value of the angle L (see Figs. 3-5), equal to several degrees. Thus, the angular mixing of the second finger is equal, the third - 2d, the 1st - (i - 1) ά, the tenth - 9 (all angular mixing are indicated relative to the first finger).

The load on the sample from the drive 12 (Fig. 1 and 6), equipped with a lead screw 13, is transmitted through the dynamometer 14 using a flexible steel tape 15, fixed with screws 16 on the pulley 17. The pulley 17 is mounted on one roller with a drum 10 and is rigidly connected to a drum 10. A small counterweight 18 is attached to the second end of the steel strip 15. The load is recorded by the electronic device unit 19.

The principle of operation of the installation is as follows.

After heating the samples to the test temperature, the actuator 12 is turned on (arrows P in Fig. 16) and the first finger, which in the initial position is engaged with the earring (Fig. 2), loads and destroys the first sample.

With a further working stroke, the drum 10 is rotated through an angle L, the second finger engages with its earring, and the second sample is loaded and destroyed.

With further working progress and rotation of the drum 10, the remaining samples are successively loaded and destroyed. Moreover, their destructive loads are sequentially recorded by a dynamometer 14 and recorded by the electronic device unit 19.

In the reverse stroke of the lead screw 13, the counterweight 18 returns the drum 1.0 to its original position.

Thus, in the proposed installation for one working, the course of the loading device, the strength of a large group of jointly heated samples is determined. This provides increased installation performance.

Claims (2)

Fig, 1 shows a diagram of the proposed installation in the performance of 10 jointly tested samples; in fig. 2 - b - sections A – A, B – B, B – B, G – D and E – E in FIG. 1 respectively. Ten Samples 1 (Fig. 1) are installed in a common passive grip 2 in such a way that they are parallel with each other and facing flat surfaces to each other. Passive grip 2 is suspended on t gax 3 to the bed 4 ustayovki. The lower heads of all the samples are installed in active grippers 5, equipped with rods 6, on the ends of which there are earrings 7. The grippers with samples are placed in a heating furnace 8. Ten fingers 9 are radially fixed on the drum 10 mounted on bearings 11. Free ends the fingers 9 enter the openings of the corresponding earrings 7. In the initial position: the first (left of FIG. i) finger 9 is engaged with its serious 7, i.e. rests on the lower traverse of the earring (see fig. 2). Each subsequent finger (from left to right in Fig. 1) has an angular displacement relative to the neighboring angle of L (see Fig. 3-5) equal to several degrees. Thus, the angular mixing of the finger is equal to, the third - 2rt, i-one - (i - 1) cA, tenth - 9 L (all angular displacements are indicated relative to the first pad) The load on the sample from the actuator 12 (Fig. 1 and 6}, equipped with a chassis viit 13, is transmitted through a dynamometer 14 by means of a flexible steel wire 15, fixed screws 16 on the pulley 17. Pulley 17 is fixed on one roller 10 of the roller and rigidly connected to the bar Aban 10. A small counterweight 18 is attached to the second end of the steel tape 15. The recording of the load is carried out by the electronic devices block 19. The principle of the installation is as follows: After heating the samples to the test temperature, the running stroke of the drive 12 (arrow P in Fig. 16) and the first the finger, which is in its initial position is engaged with the link (Fig. 2), loads and destroys the first specimen. With further operation, the drum 10 rotates at an angle L, the second finger engages with its earring, and the second sample is loaded and destroyed. With further working stroke and rotation of the drum 10, the remaining samples are successively loaded and destroyed. In this case, their destructive loads are successively fixed by a dynamometer 14 and recorded by a block of 19 electronic devices. During the reverse course of the lead screw 13, the counterweight 18 returns the drum 1.0 to its original position. Thus, in the proposed installation, in one working stroke of the loading device, the strength of a large group of jointly heated specimens is determined. This provides increased plant performance. Claims of Invention A high-temperature apparatus for determining the strength of refractory materials under stretching, comprising a stand, a heating device, active and passive specimen grips, an actuating loading device connected by means of active grippers, and a measuring device characterized in that in order to increase the installation performance, the active grippers are equipped with earrings, and the loading device is made in the form of a drum with radially fixed fingers, ukshimi earrings. Sources of information taken into account during the examination 1. Peras A.Ya. and others. The strength of refractory ceramics and methods of its research. Vilnius, Mokelas, 1977, pp.77-79. 2. USSR author's certificate 399761, cl. G 01 N 3/18, 1970. J 3 jr  6 I 16 isJL 1JL i 171 IT UL Oh J37h ig.2 Fig.Ch (Rig. Lg sixteen P