JPS62207566A - Surface pressure measuring instrument for sliding valve device - Google Patents

Abstract

PURPOSE:To decrease a steel leakage accident and to control a sliding valve device always in a normal condition by mounting bar type torque meter mounting parts to one end of tightening arms of a toggle mechanism and measuring the face pressure acting on the actual sliding surface. CONSTITUTION:Links 13 are freely rotatably engaged with both ends of spring 7 holders 8 engaging with a housing 2 and tightening arms 14 are freely rotatably pinned 15 to the other end of the links 13. The surface pressure of the sliding surface 10 can be checked as springs 7 generate deflections when the other ends of the arms 14 are engaged with pins 16 fixed to clamps 6 and the bar type torque meters 17 are inserted to the arms 14 and are rotated in the direction of an arrow 18. The surface pressure is obtd. by converting the max. tightening torque value when the arms 14 are rotated by the meters 17 to the surface pressure. The surface pressure of each time is known at the time of setting bricks to the slide valve device by such constitution and therefore, the steel leakage accident, etc. are decreased and the safe operation is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for easily measuring surface pressure of a slide valve device having a structure in which surface pressure is applied by a toggle mechanism.

BACKGROUND OF THE INVENTION FIG. 1 shows a slide valve device having a structure in which surface pressure is applied to a sliding surface using a typical toggle mechanism. Molten metal container 1
A fixed plate 3 (hereinafter referred to as a bottom plate) is fixed to a housing 2 fixed to a housing 2, and a sliding plate 4 (hereinafter referred to as a slide plate) is fitted into a slide case 5 and is slidably held by a clamp 6. has been done. The clamp 6 is engaged with a spring holder 8 by a toggle mechanism 9, and the slide plate 4 is pressed against the bottom plate 3 by the deflection of a spring 7 built into the spring holder 8.

The slide valve device slides the slide plate 4,
By shifting the nozzle centers of the bottom plate 3 and slide plate 4, the flow rate of molten steel passing through the nozzle hole 11 is controlled. ) is very important to prevent steel leakage and damage to sliding surfaces.

If the surface pressure is too small relative to the design value, when the sliding surface around the nozzle hole 11 is damaged, foreign matter will get caught in the sliding surface 10, opening the sliding surface 10 and increasing the risk of steel leakage. If the surface pressure is abnormally large, the sliding surface around the nozzle hole 11 will be damaged quickly, the life of the plate brick will be shortened, and the operating cost will increase.

Problems to be Solved by the Invention Therefore, users of slide valve devices pay close attention to the management of surface pressure. Thickness of the device (housing 2. slide case 4.
Clamp 6, toggle machine $9. Spring holder 8, etc.) may fluctuate due to deformation and wear, so the spring 7 and the above devices should be periodically checked for deformation and wear, and plate bricks must be manufactured under strict control. There is.

However, the surface pressure that actually acts when plate bricks are set on site is affected by many factors as mentioned above, so it is impossible to know the exact value, and it is determined by the control standards of each part. The current situation is that

Means for Solving the Problems The present invention is a method that can measure the surface pressure acting on the actual sliding surface when installing plate bricks and setting the toggle mechanism on site. If you know the surface pressure at the time, you can easily distinguish between abnormal equipment and normal equipment, so you can use only good products, reduce steel leakage accidents, and operate safely. Also, since the surface pressure can be measured every time bricks are set, it is easy to find abnormalities in the equipment and perform appropriate maintenance.

The present invention will be specifically explained based on the accompanying drawings.

2 and 3 show partial cross-sectional views of a toggle mechanism of a known slide valve device. A spring holder 8 with a built-in spring 7 is engaged with the housing 2 so that it can move up and down in the figure, and links 13 are rotatably engaged with the bins 12 attached to both ends of the spring holder 80. A tightening arm 14 is rotatably engaged with a pin 15 at the other end.

The pressure on the sliding surface 100 is determined by the bottle 16 fixed to the clamp 6.
The spring 7 is deflected by engaging the other end of the tightening arm 14, inserting the crowbar torque meter 17 into the tightening arm 14, and rotating the same in the direction of the arrow 18.

Figure 2 shows the state of the toggle mechanism before surface pressure is applied, and Figure 3 shows the state with surface pressure applied.The surface pressure is the maximum tightening torque when the tightening arm 14 is rotated by the pearl-type torque meter 17. Convert the value to surface pressure.

The toggle mechanism is usually installed on the left and right sides (in pairs), and the tightening torque is smaller on the side that is tightened first and larger on the side that is tightened later, but both values are proportional to the surface pressure, and either value may be measured.

Figure 6 is a table showing the surface pressure and tightening torque measured by varying the force of the spring 7 using an actual device, and shows that the surface pressure and tightening torque are almost proportional as shown in Figure 6. I understand.

If the surface pressure is too low, the risk of steel leakage accidents increases, so it is necessary to control the lower limit value in particular with respect to the design value.In the case of the device of the example, the lower limit value is 2 against the design value of 4500 Kf.
At 700KF, the actual measured tightening torque was 27Kg.
m and 16KfrrI, and is proportional to the surface pressure.

The value of the tightening torque relative to the surface pressure varies depending on the device-specific dimensions such as the length of the link 13 and the length of the tightening arm 14.
In the case of a toggle mechanism as shown in FIG. 2, the tightening torque is proportional to the surface pressure, so the tightening torque can be converted into the surface pressure.

A crowbar type torque needle is a simple torque meter that reads the torque value due to the deflection of the arm 20 using a pointer 21 as shown in Figure 4, or a strain gauge 23 is attached to the arm 22 as shown in Figure 5 to determine the tightening torque based on the amount of strain. A digital torque meter or the like that digitally displays the value on the meter 24 is used. If a digital torque meter is used, the tightening torque value can be converted into surface pressure and displayed, and the allowable range of surface pressure can be displayed in 2 increments, making surface pressure management much easier.

Effects of the Invention This invention can measure the surface pressure of the sliding surface every time bricks are set in the slide valve device as described above, and can be used for casting work after measuring the normal surface pressure, thereby preventing steel leakage accidents. By checking the surface pressure every time, it is possible to know the degree of deterioration of the equipment and the progress of deterioration, and it is possible to perform appropriate maintenance of the equipment, thereby reducing maintenance costs. It is possible to always manage the slide valve device in a normal state.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a slide valve device with a structure that applies surface pressure by a toggle mechanism, Figs. 2 and 3 are partial views of the toggle mechanism, Figs. 4 and 5 are a pearl-type torque meter, and Figs. The figure shows a table of actual measurement results of surface pressure and tightening torque. In the figure: 3...Bottom plate, 4...Slide plate, 9...Toggle mechanism, 14...Tightening arm, 15...Pearl type torque meter.

Claims (1)

[Claims] A slide valve device having a structure in which surface pressure is applied by a toggle mechanism, characterized in that a removable crowbar-shaped torque meter mounting portion is provided at one end of a tightening arm of the toggle mechanism. Surface pressure measurement mechanism.