JPS6234002A - Method for mounting apparatus for measuring deformation of rotary kiln shell - Google Patents

Abstract

PURPOSE:To enhance measuring accuracy by making a mount length extensible corresponding to the deformation of the outer surface of a shell and keeping the length and height of a string constant, by separating a means for holding a beam so as to leave a definite distance from the outer surface of the shell and a means for fixing the beam to the shell. CONSTITUTION:A contact element 4 held to a state pushed down by a spring 3 is provided to the end of the operation shaft 2 of a differential transformer being a measuring device 1. The operation shaft 2 is displaced up and down corresponding to the deformation state of the outer surface A of the shell held to the spot contact state with said contact element 4 and the quantity thereof is converted to an electric signal to be taken out to the outside. Further, the base end parts of legs 10 are fixed to both left and right end parts of a beam 5. These legs 10 take a three-point support system and the leading ends thereof are contacted with the outer surface A of the shell to hold the beam 5 so as to leave a definite distance from the outer surface A of the shell. As the fixing means 12 of said beam 5, bolts 16 for allowing shell outside fixing jigs 14 using magnets to freely oscillate are inserted through the holes 13 further outside the left and right legs 10 and compression springs 17 are engaged to thread adjustment nuts 19. The adjustment of a mount length accompanied by the deformation of the outer surface A of the shell can be automatically regulated by the springs 17.

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a method for installing a rotary kiln shell deformation measuring device that measures how the radial curvature of a shell changes when a rotary kiln rotates. be.

<Prior Art> The shell of a rotary kiln for firing cement, lime, etc. may undergo permanent deformation due to overheating caused by falling off of the refractory lining, or undergo elastic deformation due to the weight of the refractory lining or contents or the shell's own weight. In particular, the elastic deformation of the shell causes the diametrical curvature of the shell to vary at certain points on the shell during rotation of the rotary kiln. Such changes in curvature can cause repeated stress on the refractory lining, causing deterioration of the refractory lining, or can cause premature wear of the refractory lining by impairing the stability of the protective coating that adheres to the working surface of the refractory. In addition, the refractory lining is likely to fall off early in areas where shell deformation is greatest near the tire where weight is concentrated.

Therefore, in order to know the deformation behavior of the shell that is opened during rotation of the rotary kiln, the amount of deformation has been conventionally measured using an openness tester. Oparity
To briefly describe the principle of measurement using a tester, a string of a certain length is determined by holding the oparity tester a certain distance from the outer surface of the shell, and the height of the arc on the string of that certain length is the height of the kiln. Measurements and records are made by mechanically enlarging the feet that change with rotation, using the lever principle, or by using a differential transformer. A conventionally known mounting device for such an aperity tester is shown in FIG. 3A. In short, the conventional mounting device can be said to be a combination of means for holding the parity tester at a constant distance from the outer surface of the shell and means for fixing it to the shell. That is, to explain using the example shown in FIG. 3, a fixed leg part a is provided at both ends of a beam 5 equipped with a differential transformer (not shown), etc., and this fixed leg part a is attracted to the shell outer surface A. A movable leg part having a magnet 14 which can be rotated is connected via a knuckle fitting 15 so as to be swingable.

<Problem to be solved by the invention> Since the string length °C and height h shown in Fig. 3A are the standards for measuring the deformation of the shell, they are constant regardless of the deformation of the seal. If it remains unchanged, good measurement accuracy cannot be expected. However, in the conventional mounting device as shown in FIG. 3A, when the shell deforms, the neck (end angle θ changes from θ1 to θ1, as shown in FIG. 3B), and based on this, the string length β , height h also changed to λ and hl, respectively, which was a fatal flaw.

In addition, since the movable legs with magnets 14 can swing freely, they have the advantage of being able to easily accommodate shells of different diameters, but depending on the degree of permanent deformation of the shell, the magnets 14
Since the suction surface of the tester did not come into close contact with the outer surface A of the shell, the holding and fixing of the aperity tester sometimes became unstable.

An object of the present invention is to provide a mounting device that can eliminate all the drawbacks of the conventional mounting S@ as described above.

<Means for Solving the Problems> The present invention provides a means for maintaining the elongated beam to which the measuring instrument is attached at a constant distance from the outer surface of the shell so that the deformed state of the outer surface of the shell does not adversely affect the measurement accuracy of the measuring instrument. The means for fixing the beam to the shell are separated from the means for fixing the beam to the shell, and in particular, the means for fixing the beam to the shell is configured so that its installation length can be expanded and contracted in accordance with the deformation of the outer surface of the shell, thereby achieving the intended purpose. This has been achieved.

<Example> FIG. 1 shows an example in which a differential transformer is used as a measuring device for measuring diametrical deformation of a shell.

At the operation 1IiIII2 end of the differential transformer that is the measuring instrument 1, a pointed contact 4 is provided which is constantly pushed downward by a spring 3.

The actuating shaft 2 is vertically displaced by the deformed state of the shell outer surface A with which the contactor 4 makes point contact, and the displaced position is converted into an electric signal and taken out to the outside.

Using the measuring device 1 described above, the δ differential transformer is connected to the elongated beam 5.
In order to install the differential transformer in the center of the beam, in this example, a mounting plate 6 with an insertion hole for the differential transformer and a reinforcing plate 7 are fixed respectively to the upper and lower central surfaces of the beam 5 made of channel steel. A clamping fitting 8 that clamps the outer circumference of the transformer is fixed on the mounting plate 6. The operation of the differential transformer is as shown in the figure: the shaft 2, spring 3, and contact 4 are exposed below the beam 5.

Holes 9 are drilled at both left and right ends of the beam 5, and the proximal ends of the legs 10 with pointed tips are inserted into the holes 9, and the tightening nuts 1 are inserted.
Fix the legs 10 firmly with step 1. It is preferable that the legs 10 be supported at three points, for example, one on the right side and two on the left side. The tips of these legs 10 come into contact with the shell outer surface A, thereby maintaining the beam 5 at a constant distance from the shell outer surface A.

Fixing means 1 for fixing the beam 5 to the shell in the above state
2, in the example shown in FIG. 1, a hole 13 is drilled in the beam 5 portion that corresponds to the outer side of the left and right legs 10, and a shell outer surface fixing member 14 is attached to the hole 13 through, for example, a knuckle fitting 15 so that it can swing freely. A bolt 16 having a diameter of 16 mm is inserted through the bolt 16, and a spring 17 and a washer 18 are fitted onto the bolt 16, and then an adjusting nut 19 is screwed onto the bolt 16. The above-mentioned magnet is used as the shell outer surface fixing member 14, and the spring 17 is a compression spring. In the case of such a fixing means 12, when the attachment length of the fixing means 12 needs to be adjusted due to deformation of the shell outer surface A, the bolt 16 can be pulled out downward against the force of the spring 17; Conversely, the force of the spring 17 allows for automatic adjustment of pulling the bolt 16 upward.

In addition to achieving automatic adjustment of the installation length with the force of the compression spring described above, the same function can also be achieved with the force of a tension spring. Such an example is shown in FIG. In FIG. 2, the shell outer surface fixing device 14 is a hook fixed to the shell outer surface A by welding, and a threaded rod 21 is attached to the hook.
, and screw the threaded rod 21 onto one end of the turnbuckle 22. A threaded portion of a spring 23 is screwed onto the other end of the turnbuckle 22. This spring 23 is a tension spring and is connected to the beam 5 via a ring 24. In this case, automatic adjustment of the attachment length due to deformation of the shell outer surface A is achieved by stretching and contracting the spring 23.

<Effects of the Invention> In the present invention, since the legs 10 are provided at both ends of the beam 5 having the measuring device 1 attached to the central portion, the beam 5 can be extremely easily maintained at a constant distance from the outer surface of the shell. Moreover, the spring 1 is connected between the beam 5 and the shell outer surface side fixture 14.
7.23 Interposed Fixing Means] Since they are connected by 2, the length of attachment by the fixing means 12 is automatically adjusted in accordance with the deformation of the shell outer surface A, and is firmly fixed in any case. The legs 10 and the fixing means 12 described above work together to maintain the string length C and height h constant, thereby improving measurement accuracy.

Furthermore, when the number of legs 10 is three, the aperity tester can be stably fixed to the shell by three-point support even in areas where the shell is subject to large permanent deformation.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing a mounting device for an aperity tester according to the present invention, Fig. 2 is a side view showing another embodiment, and Figs. 3A and 3B are conventional mounting devices. FIG. 2 is a diagram for explaining the structure of the device and its disadvantages. 1... Measuring tool, 5... Beam, 10... Leg, 12
...Fixing means, 17, 23... Spring, A... Shell outer surface.

Claims (1)

[Claims] 1. In a rotary kiln shell deformation measuring device equipped with a measuring tool (1) for measuring changes in the diameter direction of the outer surface A of the rotating shell at the center of the beam (5), the beam (5)
) are provided with legs (10) having pointed tips at both ends, and springs (17,
23) A method for mounting a rotary kiln shell deformation measuring device, in which the beam (5) can be fixed to the shell outer surface A with a fixing means (12) including: 2. A method for installing a rotary kiln shell deformation measuring device according to claim 1, in which there are three legs (10) and a three-point support system is used.