Internal ring formation detection device for rotary kiln

Abstract

The utility model belongs to the technical field of rotary kiln running state on-line detection, and particularly relates to an internal ring formation detection device for a rotary kiln, which is characterized by comprising a base, a fixing frame, a micro-distance measuring frame and a sliding plate, the fixing frame is arranged on the base, the micro-distance measuring frame is arranged on the fixing frame, and the sliding plate is arranged on the micro-distance measuring frame. A support seat is vertically arranged on the sliding plate, a push-pull type electromagnet is arranged on the support seat, a piston end of the push-pull type electromagnet is connected with an ultrasonic probe, a displacement servo motor is further arranged on the sliding plate, an output shaft end of the displacement servo motor is connected with a gear, and the gear is meshed with a rack arranged on the micro-distance measuring frame; and one side of the microspur measuring frame is connected with the fixing frame through two spring pull rods. The device has the advantages that kiln body detection data can be provided on line in real time, whether the ring forming phenomenon occurs in the rotary kiln or not is effectively detected, and the position and the thickness of the ring forming fault of the kiln body can be found in time.

Description

Technical Field

[0001] This utility model belongs to the field of online detection technology for the operating status of rotary kilns, and particularly relates to an internal ring detection device for rotary kilns. Background Technology

[0002] Rotary kilns are large-scale equipment widely used in metallurgy and other fields. "Ring formation" is a common problem encountered during rotary kiln operation. Ring formation refers to the ring-shaped adhesion of furnace charge to the inner wall of the high-temperature zone within the kiln. Mild adhesion is called kiln lining, while significant adhesion that affects normal furnace operation constitutes ring formation. Ring formation inside the rotary kiln can lead to reduced output, increased equipment load, and wasted energy. Severe ring formation can cause accidents such as overheating of the rotary kiln motor and damage to the support rollers.

[0003] Chinese utility model patent application number 202122112512.5 discloses a rotary kiln thermal imaging ring-forming detection device. Outside the rotary kiln, a guide rail and a sprocket and chain drive pair are arranged parallel to the kiln's axis. A sliding plate is connected to the guide rail, and a thermal imager facing the kiln body is mounted on the sliding plate. Driven by a motor, the sprocket and chain drive pair moves the sliding plate along the guide rail. This solution monitors the ring-forming phenomenon inside the rotary kiln and provides the operator with the degree and location of the rings through infrared thermal imaging. A drawback of this solution is that the thermal imager's conclusions are not very accurate.

[0004] Chinese invention patent application number 202210819701.2 discloses a method for detecting the degree of ring formation in a rotary kiln, comprising the following steps: before the rotary kiln operates, acquiring the pressure of each support roller; the support roller pressure is the pressure exerted on the support roller; acquiring the angle between the center of each support roller and the center of the corresponding section of the kiln body; calculating the kiln weight before operation based on the acquired support roller pressure and the corresponding center angle; after the rotary kiln operates, acquiring the support roller pressure of each support roller again; calculating the kiln weight after operation based on the acquired support roller pressure and the corresponding center angle; calculating the degree of ring formation in the rotary kiln based on the kiln weight before and after operation; the degree of ring formation in the rotary kiln is the final result of the detection method of this invention. However, the conclusion of this method is not very precise and cannot obtain accurate information on the thickness and location of the ring formation. Utility Model Content

[0005] The purpose of this invention is to provide an internal ring detection device for rotary kilns, which overcomes the shortcomings of existing technologies. It can provide real-time online kiln body detection data to promptly detect the location and thickness of ring formation faults in the kiln body, so as to deal with them as early as possible and avoid major production problems caused by severe ring formation.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] An internal ring detection device for a rotary kiln includes a base, a fixed frame, a micro-measuring frame, and a sliding plate. The fixed frame is mounted on the base, the micro-measuring frame is mounted on the fixed frame, and the sliding plate is mounted on the micro-measuring frame. A support seat is vertically mounted on the sliding plate, and a push-pull electromagnet is mounted on the support seat. An ultrasonic probe is connected to the piston end of the push-pull electromagnet. A displacement servo motor is also mounted on the sliding plate, and a gear is connected to the output shaft end of the displacement servo motor. The gear meshes with a rack mounted on the micro-measuring frame. One side of the micro-measuring frame is connected to the fixed frame via two spring rods.

[0008] Furthermore, the structure of the spring rod includes a first sleeve, a second sleeve, and a tension spring disposed between the first sleeve and the second sleeve. The end of the first sleeve is connected to a fixing frame, and the end of the second sleeve is connected to a micro-measuring frame.

[0009] Furthermore, the parameters of the two spring rods are identical.

[0010] Furthermore, the vertical position of the push-pull electromagnet on the bracket is adjustable.

[0011] Furthermore, the ultrasonic probe has a specification of Φ20mm and a frequency of 5-6MHz.

[0012] Furthermore, the two ends of the micro-measuring frame along its length are located in the sliding grooves inside the fixed frame.

[0013] Furthermore, a linear bearing is provided inside the groove.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1) It can provide kiln body detection data online in real time, effectively detect whether ring formation occurs in the rotary kiln, promptly identify the location and thickness of the kiln body ring formation fault, and provide alarm prompts so that it can be dealt with as soon as possible to avoid the accident from escalating and causing major production problems after the ring formation becomes serious;

[0016] 2) It can continuously output thickness measurement data, which facilitates subsequent data processing and analysis and enables automated detection, alarm and problem handling;

[0017] 3) The device has a simple and reliable structure, is reusable, facilitates the upgrading of existing rotary kilns, and helps to establish a data model, providing data support for the automatic alarm or automatic ring removal program of the industrial control system. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 Top view;

[0020] Figure 3 yes Figure 2 Sectional view along line AA;

[0021] Figure 4 This is a schematic diagram of the spring pull rod structure in an embodiment of this utility model;

[0022] In the diagram: 1-fixed frame, 2-micro-measuring frame, 3-slide plate, 4-electromagnet, 5-ultrasonic probe, 6-support base, 7-push-pull electromagnet, 8-spring rod, 9-rack, 10-gear, 11-displacement servo motor, 12-positioning sleeve, 13-base, 14-sleeve one, 15-sleeve two, 16-tension spring, 17-slide groove, 18-kiln body. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0025] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] See Figure 1-4This is a schematic diagram of an embodiment of the device for detecting internal ring formation in a rotary kiln according to this utility model. It includes a base 13, a fixed frame 1, a micro-measuring frame 2, and a sliding plate 3. The fixed frame 1 is mounted on the base 13, the micro-measuring frame 2 is mounted on the fixed frame 1, and the sliding plate 3 is mounted on the micro-measuring frame 2. The sliding plate 3 is movably connected to the inner groove of the micro-measuring frame 2. A support seat 6 is vertically mounted on the sliding plate 3, and a push-pull electromagnet 7 is mounted on the support seat 6. An electromagnet 4 is located inside the outer positioning sleeve 12 of the push-pull electromagnet 7. An ultrasonic probe 5 is connected to the bottom of the piston end of the push-pull electromagnet 7. A displacement servo motor 11 is also mounted on the sliding plate 3. A gear 10 is connected to the output shaft end of the displacement servo motor 11, and the gear 10 meshes with a rack 9 mounted on the micro-measuring frame 2. One side of the micro-measuring frame 2 is connected to the fixed frame 1 via two spring rods 8. The two ends of the micro-measuring frame 2 along its length are located in the sliding grooves 17 inside the fixed frame 1. To reduce frictional resistance, linear bearings can be installed in the sliding grooves 17.

[0027] The spring pull rod 8 comprises a first sleeve 14, a second sleeve 15, and a tension spring 16 located between the first sleeve 14 and the second sleeve 15. The end of the first sleeve 14 is connected to a fixing frame 1, and the end of the second sleeve 15 is connected to a micro-measuring frame 2. The parameters of the two spring pull rods 8 should be consistent. The push-pull electromagnet 7 on the bracket 6 is adjustable in height to ensure reliable contact between the surface of the ultrasonic probe 5 and the outer surface of the rotary kiln, guaranteeing coverage of the required monitoring range and avoiding measurement errors caused by kiln ellipticity, eccentricity, etc. The fixing frame 1 can be fixed above the area of ​​the rotary kiln to be inspected using a base 13, depending on the actual environment of the rotary kiln. In this embodiment, the ultrasonic probe 5 has a diameter of Φ20mm and a frequency of 5-6MHz.

[0028] In use, when the push-pull electromagnet 7 is pressed down, the ultrasonic probe is firmly pressed against the surface of the kiln body 18. The ultrasonic probe is pushed down to contact and press against the surface of the kiln body, and the current thickness value is measured. During measurement, the micro-measuring frame 2 moves along the slide groove 17 of the fixed frame 1 under the friction force of the ultrasonic probe 5 to ensure that the ultrasonic probe 5 and the surface of the kiln body are not displaced, thus ensuring the accuracy of the measurement value. After the measurement is completed, the push-pull electromagnet 7 is lifted, the ultrasonic probe 5 is retracted, and the micro-measuring frame 2 is reset under the action of the spring rod 8, ready for the next measurement. If it is necessary to change the position of the detection point, the displacement servo motor 11 drives the gear 10 to move the required distance along the rack 9 to change the measurement position. By repeating the above steps, continuous measurement at multiple points can be achieved. The measurement data can be directly connected to a digital display instrument for display or connected to an industrial control system for analysis and processing. By using the ultrasonic thickness measuring probe to perform regular measurements at multiple points in the kiln body where rings are prone to form, when the measured value changes continuously, it can be determined that rings have formed, and the position and degree of the rings can be estimated based on the measured value.

[0029] When running automatically, the measurement interval time and the displacement distance of the measuring slide can be set to achieve continuous multi-point measurement within the detection range.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An internal ring formation detection device for a rotary kiln, characterized by, The utility model relates to a micro distance measuring device, including base, fixed frame, micro distance measuring frame and slide, be equipped with fixed frame on base, be equipped with micro distance measuring frame on fixed frame, be equipped with slide on micro distance measuring frame, be equipped with support seat perpendicularly on slide, be equipped with push-pull electromagnet on support seat, the piston end of push-pull electromagnet is connected with ultrasonic probe, still be equipped with displacement servo motor on slide, the output shaft end of displacement servo motor is connected with gear, gear and the rack of setting on micro distance measuring frame are engaged, one side of micro distance measuring frame is connected with fixed frame through two spring pull rods.

2. An internal ring formation detection device for a rotary kiln according to claim 1, characterized in that, The structure of the spring pull rod includes sleeve one, sleeve two, and a tension spring arranged between the sleeve one and the sleeve two. The end of the sleeve one is connected with the fixed frame, and the end of the sleeve two is connected with the micro distance measuring frame.

3. An internal ring formation detection device for a rotary kiln according to claim 1, wherein The parameters of the two spring pull rods are consistent.

4. An internal ring formation detection device for a rotary kiln according to claim 1, wherein The up-and-down position of the push-pull electromagnet on the support seat is adjustable.

5. An internal ring formation detection device for a rotary kiln according to claim 1, wherein The specification of the ultrasonic probe is Φ20mm, and the frequency is 5-6MHz.

6. An internal ring formation detection device for a rotary kiln according to claim 1, wherein The length direction of the micro distance measuring frame is equipped with a slide groove on the inner side of the fixed frame.

7. An internal ring formation detection device for a rotary kiln according to claim 6, wherein A linear bearing is arranged in the slide groove.

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