JPS584780B2 - Method and device for measuring fireproof mortar adhesion time - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and device for measuring the adhesion time of refractory mortar, and in order to eliminate errors caused by human factors in the adhesion time of refractory mortar, this invention is completely mechanically measured. It is intended to do.

In general, the properties that hard-fired mortar must have include fire resistance, adhesion, corrosion resistance, workability, etc.
Among these, workability is one of the important characteristics that determines the quality of a furnace.

However, conventionally, this workability has been commonly known as "trowel riding", "trowel cutting", "extension", "stickiness", and [bonding time (
At present, its quality is determined by the ``intuition'' and ``preferences'' of the worker.

In particular, regarding the bonding time, if this is too short, the bricks will stop too quickly, making it difficult to make corrections and making it impossible to lay bricks according to the dimensions.

Also, if it is too long, the bricks will move forever, which will take time to build the furnace, causing sinking of the joints and cracking of the joints.

Manufacturers and users have long wanted to quantitatively evaluate this workability, but it has been technically extremely difficult to do so.

For example, regarding the adhesion time of fireproof mortar, JISR
2505, ``The adhesion time is defined as the time required to move the upper brick in the longitudinal direction, starting from the time when a well-kneaded mortar is sandwiched between two regular-sized bricks to create a joint of 3 mm, until it hardly moves. However, there are no clear regulations regarding the ``how to move'' or ``end point,'' and although each manufacturer and user has tried their own various methods, none is yet generally accepted as an inspection method. I can't find it.

In other words, this is because, as described below, each determination is made based on the "intuition" of the measurer.

For example, in ``how to move'' a brick, ■ Hold the brick between your thumb and ring finger and move it 5mm back and forth in the longitudinal direction.
move it to

■ Hold the brick between your thumb, middle finger, and ring finger and move it 5 mm back and forth in the longitudinal direction.

■ Press back and forth with your thumb or index finger (continuously or intermittently at intervals of about 20 seconds).

Regarding how to determine the "end point", ■ When the device hardly moves after using the method described in ■.

■ When the power is almost reduced by the method of p.

■ When the device hardly moves after using the method described in ■.

■ When the movement is less than 1mm.

■ When there is no more slight movement.

■ When it does not move even when you press it with the palm of your hand.

etc., which is a very ambiguous expression that describes the measurer's ``feeling''.
It is unavoidable that the measurement error due to the "condition of force" is usually around 30" to 1'.

Moreover, this error often caused trouble.

Therefore, in the present invention, the determination of "how to move" and "one end point" based on the "intuition" of the measurer, which has many errors due to the above-mentioned human factors, is mechanically operated and measured.

The method of this invention will be explained below with reference to the drawings.

In the figure, 1 is a machine body, 2 is a base plate for mounting and fixing a lower test brick A, and is supported so as to be able to rise and fall by a lifting screw 7 whose base is screwed into a horizontal frame a of the machine 1.

Reference numeral 8 designates a handle for raising and lowering this lift, and reference numeral 9 designates a clamping piece for the lower test brick A that moves on the base plate 2 so as to be expandable and contractible by the handle 10.

A rod-shaped sliding body 3 whose both ends are horizontally supported by sliding bearings 11 is provided above the base plate 2 .

This sliding body 3 is for gripping and sliding the upper test brick B which is placed on the lower test brick A on the base plate 2 with refractory mortar C of a predetermined joint thickness interposed therebetween. A support piece 12 for gripping the test brick above is vertically provided so as to be expandable and contractable.

In addition, a vertical culm 13 is erected in the center of the sliding body 3, and a horizontal sliding rod 14 added to the upper end of the vertical culm is reciprocated to indirectly cause the sliding body 3 to reciprocate. There is.

However, as shown in FIG. 3, it is also possible to directly reciprocate the sliding body 3, or, although not shown, the horizontal sliding rod 14 can be used as a fixed guide rod to move the vertical culm 13. It is also possible to reciprocate according to the same guide rod.

15 is a crank rod for this reciprocating motion;
It is one component of the drive device 4.

The other end of the crank throat 15 is eccentrically connected to a rotating body 17 rotated by a motor 16.

18 is a clutch, 19 is a clutch handle, 20 is a pulley, and 21 is a belt transmission mechanism.

Of course, as the drive device 4 for this sliding body 3, in addition to the above-mentioned crank mechanism, a cylinder device or the like may be directly connected to make the sliding body 3 reciprocate.

In addition, when the upper test brick B was removed by automating the clutch 18 and moving the center of gravity due to the eccentricity of the pulley 20,
If the sliding body 3 is automatically returned to the position before starting, the sliding body 3 will always align with the base plate 2 at a constant position, and there will be no need to center it for the next measurement. It is convenient to put it into work.

In this way, the sliding body 3 is moved to the crank rod 1 by the rotating body 17.
5, it is reciprocated in the horizontal direction by a predetermined stroke, for example, 5 mm left and right in the figure.

Next, during this reciprocating movement, a load transducer (for example, the one shown in Fig. 1 is an electric torque meter, a second
The one shown in the figure is a load transducer using a load cell, but a general pressure gauge such as a magnet cell for measuring changes in fluid pressure can also be used.

In this invention, first, the lower test brick A of the two test bricks made of simmering bricks is placed and fixed on the base plate 2, the simmering mortar C is applied thereon, and then the sliding body 3 is The upper test brick B is attached, and the base plate 2 is raised and lowered, and the upper and lower test bricks A and H are set in such a state that a mortar C with a predetermined joint thickness is interposed between them.

Next, when the rotating body 17 is rotated by the motor 16, the sliding body 3 is moved horizontally by a predetermined stroke by the crank rod 15 that connects the rotating body 17 and the horizontal sliding rod 14 or directly with the sliding body 3. Therefore, the sliding body is made to reciprocate over the lower test brick A while holding the upper test brick B.

Since the refractory mortar C interposed between the lower test brick A and the upper test brick B hardens over time, the sliding resistance of the upper test brick B increases.

If this increase in sliding resistance over time is plotted as a direct force using the recorder 5 via the load transducer 6, it will be plotted as a graph as shown in Figure 4, and as torque via the electric torque transducer 6. If a graph is drawn by the recorder 5 through the , each line diagram as shown in FIG. 5 can be obtained.

In FIGS. 4 and 5, the horizontal axis represents time (seconds), and the vertical axis represents force (kg) or torque (kgcm).

Also, since the time (1) can be adjusted by the speed of the recording paper, the adhesion time (io) when the re-fire mortar C reaches the required force (Fo) or torque (To) can be accurately determined from this recording paper. And you can easily read more.

Therefore, by using the method of the present invention, there is an effect that the adhesion time of shochu mortar can be accurately and easily measured.

[Brief explanation of drawings]

Fig. 1 is a plan view of a measuring device for carrying out the method of the present invention, Fig. 2 is a front view of the same, Fig. 3 is an explanatory diagram showing an example of another measuring device, and Fig. 4 is a plan view of the measuring device for carrying out the method of the present invention. FIG. 5 is a graph showing the relationship between torque and torque over time. 1... Airframe, 2... Base plate, 3...
...Sliding body, 4...Drive device, 5...
Recorder, 6...Converter.

Claims (1)

[Claims] 1. Highly flammable mortar with a predetermined joint thickness is interposed between two upper and lower test bricks made of refractory bricks, and when the upper test brick is slid back and forth in its longitudinal direction, A method for measuring refractory mortar adhesion time, which comprises mechanically moving a sliding member for gripping test bricks in reciprocating horizontal motion, and recording changes in resistance force accompanying hardening of the one-fire mortar via a required transducer. . 2) A base plate 2 that is attached to the machine frame 1 and fixes the lower test bricks on the upper horizontal surface; and 2) An upper base plate that is installed above the base plate 2 and is connected to the lower test bricks via mortar. A sliding body 3 that grips the test brick; c) A drive device 4 that slides the sliding body 3 in the horizontal direction integrally with the upper test brick; and D) The sliding body 3 is driven by the drive device 4. A refractory mortar adhesion time measuring device comprising: a transducer 6 that generates a signal according to the resistance force applied; and e) a recorder 5 that records the signal.