JPH01270638A - Hot strength tester - Google Patents

Abstract

PURPOSE:To perform a test in a testing furnace having small capacity, by arranging sample pieces on a rail at a definite pitch to send the same into a strength tester. CONSTITUTION:In a testing furnace (electric furnace) 1, a furnace lid 3 is mounted to the upper surface of a furnace wall 2 formed into a U-shaped slightly oblong cross- section in an openable and closable state and sample pieces 5 such as refractory tiles are sent in the furnace from the sample piece inlet 4 thereof to be sent to a strength tester 6 while the tested sample pieces 5 are discharged from the freely openable and closable discharge port 8 provided to a furnace floor 7. A rail floor material 10 provided with rails 9 in parallel at a predetermined interval is arranged to the upper surface of the furnace floor 7 and the sample pieces 5 are arranged on the rails through spacers 11 to be mounted thereon and fed by a definite dimension by a moving apparatus (electromotive cylinder) 12. The spacers 11 are made lower than the sample pieces 5 and depressed at the central parts thereof so as not to obstruct a transverse breaking strength. Heaters 24 are arranged to the furnace lid 3 at a definite interval and raise the temp. in the furnace 1 to predetermined temp. to heat the sample pieces 5. Inert gas blow-in pipes 25 are arranged on both sides of the furnace wall 2 at a definite interval and N2-gas blown in the furnace 1 to control an atmosphere in the furnace.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot strength testing device, and more particularly to a hot strength testing device that is energy-saving and capable of controlling the atmosphere.

Conventional technology In the past, to measure the hot strength of refractory bricks, ceramics, etc., specimens were placed on a trolley, transported into a test furnace, and the specimens were bent at a predetermined bending position. , a method of measuring bending load is known.

Furthermore, a batch processing method is known in which sample pieces are fed into a test furnace in a hatch type and the sample pieces are sequentially broken when a predetermined temperature is reached.

Problems to be Solved by the Invention However, the former method requires a large capacity as a test furnace in order to transport the cart into and out of the test furnace, and the cart is heated at the same time as the sample piece, and furthermore, the loading and unloading of the cart and cart requires a large capacity. More than 10 times the amount of heat was removed from the sample piece. Therefore, the method of transporting sample pieces using a trolley requires an unnecessary large amount of heat, consumes a large amount of electricity, and even if N2 gas etc. is blown in to adjust the atmosphere inside the furnace, the volume inside the furnace is large and the atmosphere cannot be adjusted. It was impossible.

In addition, in the latter case, the number of punches processed is about ten,
It was extremely inefficient.

Means for Solving the Problems The present invention was developed in view of the above-mentioned problems, and in order to solve the above-mentioned problems, sample pieces of refractory bricks, ceramics, etc. are fed to a testing furnace and tested using a strength testing machine. In hot strength testing equipment that performs hot strength tests, a rail for sliding the sample pieces is laid on the hearth of the test furnace, and the sample pieces are arranged at a constant pitch on this rail and fed freely into the strength testing machine. An object of the present invention is to provide a hot strength testing apparatus characterized in that a test furnace is formed to have a small capacity enough to carry out a test by heating a sample piece to be fed to a required temperature.

According to the present invention, by arranging sample pieces on a rail via spacers and sending them into a strength testing machine to perform a strength test, a small capacity test can be achieved without consuming a large amount of heat with a trolley as in the past. Hot strength tests can be conducted in a test furnace. In addition, by making the test reactor small in capacity, the power capacity of the test reactor can be reduced to less than half of the conventional one.
The atmosphere inside the furnace can also be easily adjusted by blowing in two gases.

Example The present invention will be explained below based on examples.

FIG. 1 and subsequent figures show an embodiment of the present invention. The test furnace 1 is of an electric furnace type, and as shown in Figs. 1 and 2, a furnace lid 3 is installed on the upper surface of the furnace wall 2, which is a refractory wall with a predetermined thickness and a slightly horizontally elongated TJ-shaped cross section. A sample piece 5 such as a refractory brick is sent from the sample piece inlet 4 on one end side to the strength testing machine 6 on the other end side, and the tested sample piece 5 is passed through the hearth 7 on the other end side. The water is discharged from a discharge port 8 which can be opened and closed at the bottom. The hearth 7 is formed integrally with the hearth wall 2, and as shown in FIG. The above-mentioned sample pieces 5 are arranged and mounted via spacers 11, and the samples are fed by a fixed length using a transfer device 12 such as an electric cylinder provided at the end of the hearth 7 extending outward. The piece 5 is fed into a strength testing machine 6. As shown in FIG. 2, guides 13 are provided on both sides of the rail floor material 10 to project along the rail 9, so that the sample pieces 5 can be transferred along the rail 9 in an aligned state. In addition, the spacer 11 is made slightly shorter than the sample piece 5 as shown in FIGS. 1 and 2, and its central part is recessed so that it does not get in the way of bending. It is made of high-purity alumina material that does not cause. Also hearth 7
The material used is silicon nitride because it does not cause a chemical reaction with the sample piece 5 and is resistant to wear and tear.

The strength testing machine 6 penetrates the furnace cover 3 and protrudes a bent part 14 like a plunger into the furnace as shown in FIGS. The position of the sample piece 5 which has been stopped can be detected by a sample piece detector 15 that protrudes completely, and the sample piece 5 that has been stopped can be tested. The strength testing machine 6 is constructed by erecting a pedestal 35 across the testing furnace 1 as shown in FIG.
A load lever 16 is pivotally supported on a pedestal 35 by a lever mechanism like a scale, and the bending portion 14 of the plunger is vertically disposed in the center thereof via a support fitting 17 so as to be replaceable.

Then, move the load loading device 18 to the load lever 1 as shown in the figure.
6, so that a predetermined load can be applied to the bending portion 14 using the lever mechanism of the load lever 16 to perform a bending test. In addition, as shown in the figure, a weight 19 is suspended from the other end of the load lever 16 so that the central bending portion 14 is supported in a neutral state, and the load lever 19 on the load side
A load detector 20 such as a load cell and a displacement meter 21 such as a strain gauge or magnetic gauge are attached to one end of the 6, and a cart screw 22 is connected to the load sensor 20, and a servo motor 23 such as a pulse motor is used to detect the load. The screen 1-22 is driven to rotate, a load detector 20 measures the bending load of the sample piece 5, and a displacement meter 21 measures the displacement of the sample piece 5.

Furthermore, heaters 24 such as Kanthal Super are arranged at regular intervals on the furnace lid 3 as shown in FIG. year,
Inert gas blowing pipes 25 are arranged at regular intervals on both sides of the furnace wall 2, so that atmospheric gas such as N2 gas or Δr gas can be blown into the furnace to adjust the atmosphere.

The sample furnace 1 formed as described above can be automatically controlled by a computer 26 such as a personal computer as shown in FIG. A sequencer 27 connected to the computer 26 can freely drive the transfer bag W12 according to program settings, detect the position of the sample pieces 5 with the sample piece detector 15 in the bending part, and feed the sample pieces 5 into the bending part in sequence. It's in control.

Further, the computer 26 and the test furnace 1 can be controlled to a predetermined temperature state via the temperature controller 28. The servo motor 23 of the load application device 18 is electrically connected to the computer 26 which is linked to the sequencer 27 through a servo driver 29, and the servo motor 23 is freely driven at a predetermined pressurizing speed. 14 can be raised and lowered, and the applied load on the bending section 14 detected by the load detector 20 and the displacement of the sample piece 5 detected by the displacement meter are transmitted to the computer 26 via the converter 30, and the storage medium 31 of a floppy disk is transmitted. This allows for appropriate recording.

The computer 26, which automatically controls the load application device 18, transfer device 12, temperature controller 28, etc. as described above, inputs the number, product name, dimensions, strength data, etc. of the sample piece 5 using the keyboard 32 as shown in the figure. Freely, C
It can be freely outputted via the RT 32, and the bending strength, displacement amount, etc. of the sample piece 5 can be converted and outputted to the printer 34 as appropriate.

In a test furnace configured in this way, the sample pieces are lined up on the rails and fed, so the furnace volume is less than one-fourth that of a conventional trolley-transfer type, and the power consumption is only half that of the conventional one. 1 or less. In addition, N2 gas was blown into the furnace at a rate of 3ON/day through an inert gas blowing pipe.
The atmosphere could be adjusted to a concentration of 0.1% or less.

Furthermore, the sample furnace can be automatically operated by a personal computer such as the one described above, making continuous unmanned operation possible, and sample pieces can be tested even at night.

In particular, in this example, since the sample piece is mounted on the rail and transferred, the contact area between the sample piece and the hearth can be reduced, and the transfer device can have a small output.Furthermore, guides are provided on both sides of the rail. Therefore, even if there is a dimensional error in the sample piece,
This allows the sample piece to be reliably sent to the strength testing machine along the guide for testing.

Furthermore, since the furnace cover can be lifted and removed from the test furnace, inspection and repair of the inside of the furnace can be performed easily and conveniently.

In addition to the above-mentioned refractory bricks, the sample piece may be insulating bricks, castable refractories, ceramics, steel materials, plastics, composite resin materials, or the like.

Effects of the Invention As described above, in the present invention, the sample pieces can be fed in line on the rail, and there is no need to heat the cart and lose a large amount of heat as in the past, and the amount of electricity is reduced compared to the conventional method. This can be reduced to more than half compared to the previous year, and the capacity of power equipment can also be significantly reduced. In addition, the test furnace can heat the sample pieces sent to the test furnace to the required temperature to make the volume small enough for testing, making the furnace equipment more compact, and making it easier to adjust the atmosphere inside the furnace by blowing in N2 gas, etc. This enables efficient and efficient testing of sample pieces.

[Brief explanation of the drawing]

1 is a partially omitted side sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along arrow A-A in FIG. 1, and FIG. 3 is a control block diagram of the same. DESCRIPTION OF SYMBOLS 1... Test furnace, 5... Sample piece, 6... Strength testing machine, 7... Hearth, 9... Rail, 12... Transfer device. Makoto Makoto

Claims (1)

[Claims] (1) In a hot strength testing device that sends sample pieces of refractory bricks, ceramics, etc. to a testing furnace and performs hot strength tests on the strength testing machine, rails for sliding the sample pieces are laid on the hearth of the testing furnace. The sample pieces are arranged on this rail at a constant pitch so that they can be freely fed into the strength testing machine, and the test furnace is constructed with a small capacity that allows testing by heating the sample pieces to the required temperature. A hot strength testing device characterized by the following: