JP5557151B2 - Rotating body circumference measuring device in rotary kiln - Google Patents

Description

  The present invention relates to a rotary kiln used for cement production, waste disposal, refining of various raw materials, and the like, and more particularly to an apparatus for measuring the circumference of a rotating body constituting the rotary kiln.

  As shown in FIG. 3, the rotary kiln is basically composed of a body 2 serving as a rotary furnace, a girth gear 3, a pinion gear 4, a tire 5, and a roller 6. The girth gear 3 is a gear for rotationally driving the body 2, and is provided at an arbitrary position on the outer periphery of the body 2. The pinion gear 4 is a gear for transmitting power from a driving source 7 such as a motor to the girth gear 3.

  The tire 5 is provided on the outer periphery of the body 2 and forms a contact point with a roller 6 that supports the body 2. The body 2 is a long object having a radius of about 1.5 to 3 m and a length of about 40 to 120 m. For this reason, the tires 5 are arranged at a plurality of locations on the body 2. The rollers 6 are arranged at the bottom of each tire 5 as a pair of two and play a role of supporting the body 2.

  In the rotary kiln 1 having such a configuration, a continuous load is repeatedly applied over a long period between the tire 5 provided on the body 2 and the roller 6 that supports the tire 5, and therefore, due to wear and deterioration over time. The body 2 may drop or the roller 6 may come into contact with one another. Since the body 2 is a long heavy object as described above, the body 2 itself is distorted when a local drop or a piece hit occurs. In addition, when the overall depression occurs, the engagement between the girth gear 3 and the pinion gear 4 becomes deep, which hinders driving.

  In order to prevent such distortion of the fuselage 2 and driving trouble, when the fuselage 2 falls, the height of the fuselage 2 is reduced by reducing the distance between the axes of the rollers 6 that support the drop part. It needs to be adjusted. However, whether or not the body 2 has fallen, that is, whether or not wear has occurred on the tire 5 or the like can be known for the first time only by stopping the operation of the rotary kiln 1 and performing an inspection. Further, the wear of the body 2 is a value that can be obtained by measuring the outer peripheral length of the body 2 having a diameter of several meters by an operator's hand and converting this into a diameter. Problems such as poorness and productivity deterioration by stopping the rotary kiln 1 have been regarded as problems.

  Patent Document 1 discloses means for improving the support state of the body by the roller by changing the contact surface of the roller based on a load change resulting from a change in the contact state between the tire and the roller.

JP 7-218141 A

  According to the means disclosed in Patent Document 1, since the load applied to the roller is distributed, damage to the body due to the tire hitting the roller can be avoided. Conceivable.

However, since the means disclosed in Patent Document 1 corrects a change in the load applied to the roller, it is impossible to detect a decrease in the number of rollers and tires, and an outer peripheral runout of the tire. Therefore, as a result, even if a part of or the entire body is depressed, it cannot be detected. This may cause distortion and breakage of the trunk.
Therefore, an object of the present invention is to provide a measuring device that can detect the outer peripheral length of a rotating body such as a tire without stopping the rotary kiln.

In order to achieve the above object, a circumferential length measuring device for a rotating body in a rotary kiln according to the present invention is a device for measuring the circumferential length of a rotating body in a rotary kiln, and the rotational speed of the rotating body is measured by a striker and a sensor. A circumference detector having a rotation detector for detecting, a circumference measuring roller that is in rolling contact with the outer circumference of the rotating body, and a rotation angle detector for detecting a rotation angle of the circumference measuring roller; and the circumference Controlling the operation of the shake detecting means for detecting irregularities on the outer peripheral surface of the rotating body by detecting the vertical movement of the measuring roller, the rotation detecting section , the circumference measuring section , and the shake detecting means , Based on the number of rotations detected by the rotation detection unit, the rotation angle detected by the circumference measurement unit, and the circumference of the circumference measurement roller, the circumference and outer diameter of the rotating body, or And having a control unit having an arithmetic unit for calculating the one of the circumferential length and Soto径.

By detecting the vertical movement of the circumferential length measuring roller , it is possible to reduce the size of the apparatus and reduce the installation space by detecting irregularities on the outer peripheral surface of the rotating body .

  According to the circumferential length measuring device for a rotating body in a rotary kiln having the above characteristics, the outer circumferential length of a rotating body such as a tire can be detected without stopping the rotary kiln.

It is a block diagram which shows the structure of the circumference measurement apparatus of the rotary body in the rotary kiln which concerns on embodiment. It is the elements on larger scale of the rod in the circumference measurement part provided with a shake detection means. It is a figure which shows the basic composition of a rotary kiln.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a rotating body circumference measuring device in a rotary kiln according to the present invention will be described below in detail with reference to the drawings.
First, with reference to FIG. 1, a tire 62 that is externally fitted to the body 60 as a rotating body to be measured will be described as an example. A circumference measurement device (hereinafter simply referred to as a measurement device 10) of a rotating body according to the present embodiment is configured based on a rotation detection unit 12, a circumference measurement unit 20, and a control unit 40.

  The rotation detection unit 12 is configured based on a proximity sensor 14 and a striker 16. The proximity sensor 14 is a sensor that detects the approach of the striker 16 in a non-contact manner, and is disposed with the detection surface facing the side surface of the tire 62. The means for fixing the proximity sensor 14 is not particularly limited. For example, the proximity sensor 14 may be attached to a fixed object by a magnet base 18 or the like. The striker 16 is an object to be detected by the proximity sensor 14. Each time the body 60 circulates, it is attached to the side surface of the tire 62 so as to pass the sensor surface of the proximity sensor 14. As the attaching means for the striker 16, a magnet may be used when the material of the tire 62 is a magnetic material, and an adhesive tape or the like may be used when the material is a non-magnetic material. According to the rotation detection unit 12 having such a configuration, the striker 16 detected by the proximity sensor 14 circulates and is detected again, thereby recognizing that the body 60 has made one round.

  The circumference measuring unit 20 is configured based on a circumference measuring roller 22 and a rotation angle detector 24. In the present embodiment, the circumference measuring unit 20 includes a shake detecting means 26. The circumferential length measuring roller 22 is a roller that contacts the outer circumference of the tire 62 and rotates along with the tire 62. The rotation angle detector 24 is a sensor that detects the rotation angle of the circumferential length measuring roller 22 as a pulse. The rotation length detector 24 increases the number of output pulses in one rotation, that is, 360 degrees (the higher the resolution), the longer the measurement length. Can improve the accuracy.

  For example, when the rotation angle detector 24 having a resolution of 2000 pulses / revolution is used, it is possible to measure up to a distance of 1/2000 of the outer circumference of the circumference measuring roller 22. Since the outer peripheral length of the circumferential length measuring roller 22 is known, the outer circumference of the tire 62 is detected by detecting how many (how many times) the circumferential length measuring roller 22 has rotated during one revolution of the tire 62. The length (perimeter) can be measured.

  The shake detection means 26 detects the distortion of the outer periphery of the tire 62 as a measurement target by detecting the vertical movement of the circumferential length measuring roller 22, and its configuration is not particularly limited. For example, the following configuration may be used. The shake detecting means 26 includes a fixed plate 30, a movable plate 28, a spring 32, and a laser displacement meter 34 disposed on a rod 36 that supports the circumferential length measuring roller 22 and the rotation angle detector 24. As shown in FIG. 2, the rod 36 supporting the circumferential length measuring roller 22 is divided into an upper piece 36a connected to the circumferential length measuring roller 22 and a lower piece 36b connected to the magnet base 38 for fixing the position. The lower end portion of the upper piece 36a can be accommodated in the upper end portion of the lower piece 36b by making the diameters of the dividing surfaces different. For this reason, the rod 36 can be expanded and contracted by sliding the housing portion.

  The fixed plate 30 and the movable plate 28 are provided with the fixed plate 30 on the lower piece 36 b and the movable plate 28 on the upper piece 36 a with respect to such a rod 36, and the spring 32 is provided between the fixed plate 30 and the movable plate 28. Be placed. The spring 32 may be, for example, a string spring, and has a function of pushing up the movable plate 28 from the fixed plate 30 and pressing the circumferential length measuring roller 22 against the outer peripheral surface of the tire 62.

  The laser displacement meter 34 is disposed on the fixed plate 30 so that the laser irradiation surface faces the movable plate 28. According to such an arrangement, when the circumference measuring roller 22 is pushed back due to the outer circumference deflection of the tire 62 or the amount of pushing of the circumference measuring roller 22 increases, the circumference measuring roller 22 is swung. By detecting the distance between the movable plate 28 and the fixed plate 30 that changes, the unevenness of the outer peripheral surface of the tire 62 can be detected.

  The control unit 40 is configured based on a sequencer 42 and a display 44. The sequencer 42 plays a role of performing signal control of various electronic devices, and the proximity sensor 14, the rotation angle detector 24, and the laser displacement meter 34 described above are connected as control target devices. In the case of this embodiment, the display unit plays the role of an input unit and a display unit, and is connected to the sequencer 42 described above. The input means is means for inputting various control commands. For example, the display screen 46 in the display 44 is in a touch panel format, and the proximity through the sequencer 42 is selected by selecting a control device or a control program displayed on the display screen 46. The sensor 14, the rotation angle detector 24, and the laser displacement meter 34 are controlled, and information displayed on the display screen 46 is switched. The information displayed on the display screen 46 includes, for example, the number of pulses detected by the rotation angle detector 24 while the tire 62 as a measurement object makes one rotation, the number of pulses and the circumference of the circumference measuring roller 22. These are the circumferential length and diameter of the tire 62 calculated based on the above and the outer runout detected by the laser displacement meter 34. The control unit 40 is connected to a power supply unit 50 that covers the power of the entire measurement apparatus 10.

  In the measurement apparatus 10 having such a configuration, when the measurement program is activated via the display screen 46 of the display 44, the proximity sensor 14, the rotation angle detector 24, and the laser displacement meter 34 are turned on via the sequencer 42. , OFF control is started. Specifically, when a measurement program activation signal is output, the proximity sensor 14 is activated first. When the proximity sensor 14 catches the striker 16 due to the rotation of the tire 62 as the measurement target, a signal to that effect is transmitted to the sequencer 42. The sequencer 42 that has received the signal that the proximity sensor 14 has captured the striker 16 activates the rotation angle detector 24 and the laser displacement meter 34, and starts measuring the circumferential length and the outer circumference deflection. Signals (pulses) output from the rotation angle detector 24 and the laser displacement meter 34 are transmitted to a calculation unit (not shown) provided in the display 44 via the sequencer 42 and counted.

  By rotating the tire 62, the striker 16 makes one round, and the proximity sensor 14 transmits a signal indicating that the striker 16 has been captured again to the sequencer 42, whereby the sequencer 42 is measured by the rotation angle detector 24 and the laser displacement meter 34. The proximity sensor 14 is also stopped, and a measurement end signal is output to the calculation unit of the display unit 44.

  The calculation unit that has received the measurement finishes the circumferential length and / or diameter of the tire 62 based on the counted number of pulses, the resolution of the rotation angle detector 24, and the circumferential length (diameter) of the circumferential length measuring roller 22. In addition to calculating one of them, the measured value by the laser displacement meter 34 from the start of measurement to the end of measurement is displayed on the display screen 46. Various data may be displayed on a single screen (one page), or data displayed on a plurality of screens (multiple pages) may be sequentially switched and displayed.

  According to the measuring apparatus 10 having such a configuration, it is possible to detect the outer peripheral length and outer peripheral runout of the tire 62 without stopping the rotary kiln. Thereby, the improvement of the movable efficiency of a rotary kiln can be aimed at. In addition, since measurements can be performed easily without stopping the rotary kiln, it is possible to perform periodic measurements at relatively short intervals, and it is possible to detect in advance the risk of damage and malfunction of the rotary kiln. It becomes.

  In the measuring apparatus 10 as described above, a personal computer (not shown) may be connected as the control unit 40 in place of the sequencer 42 and the display 44. With such a configuration, various measurement values can be stored in storage means such as a hard disk or a memory.

  By making the measurement value memorizable, it becomes possible to reset the measurement value obtained by the rotation angle detector 24 and the laser displacement meter 34 for each striker detection signal and to continuously measure the circumference and runout. .

Further, based on the measurement data, and plotting the state of the outer circumferential deflection with respect to the reference circle, it is also possible to profile grams to display it. Thereby, it becomes easy to obtain information such as which part of the tire 62 is likely to be deformed over time or which part of the body is heavily loaded.

  In the above-described embodiment, the tire 62 externally fitted to the body 60 is described as an example of the rotating body to be measured. However, the measuring apparatus 10 according to the present invention can be used even when the roller that supports the tire 62 or the rotating body 60 itself is a measurement target.

  Further, in the above embodiment, the shake detection means 26 is provided in the circumference measuring unit 20. However, the shake detection unit 26 may be provided independently of the circumference measuring unit 20. Specifically, the laser irradiation surface of the laser displacement meter 34 is directly applied to the outer peripheral surface of the rotating body. In the above embodiment, the non-contact laser displacement meter 34 is used as the displacement meter of the shake detection means 26. However, the displacement meter may be a contact displacement meter using a differential transformer type or the like.

  If this invention is a rotary body, a circumference, a runout, a diameter, etc. can be measured irrespective of the size of the outer diameter.

DESCRIPTION OF SYMBOLS 10 ......... Measurement device (rotational body circumference measuring device), 12 ......... Rotation detector, 14 ......... Proximity sensor, 16 ......... Strike, 18 ......... Magnet base, 20 ......... Perimeter Measuring section, 22 ......... circumference measuring roller, 24 ......... rotation angle detector, 26 ...... shake detecting means, 28 ...... movable plate, 30 ...... fixed plate, 32 ...... spring, 34 ......... Laser displacement meter, 36 ......... Rod, 36a ......... Upper piece, 36b ......... Lower piece, 38 ......... Magnet base, 40 ......... Control unit, 42 ......... Sequencer, 44 ... …… Indicator, 46 ... …… Display screen, 50 ... …… Power supply, 60 ... …… Body, 62 ... …… Tire.

Claims (1)

A device for measuring the circumference of a rotating body in a rotary kiln,
A rotation detector that detects the number of rotations of the rotating body with a striker and a sensor;
A circumference measuring unit having a circumference measuring roller that is in rolling contact with the outer circumference of the rotating body and a rotation angle detector that detects a rotation angle of the circumference measuring roller;
A shake detecting means for detecting irregularities on the outer peripheral surface of the rotating body by detecting the vertical movement of the circumferential length measuring roller ;
The operation of the rotation detection unit , the circumference measurement unit , and the shake detection unit is controlled, the number of rotations detected by the rotation detection unit, the rotation angle detected by the circumference measurement unit, and the circumference measurement In the rotary kiln, comprising: a control unit including a calculation unit that calculates one of the circumferential length and outer diameter of the rotating body, or the circumferential length and outer diameter based on the circumferential length of the roller. Perimeter measurement device for rotating bodies.

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