Crystallizer foot roll deformation detection device and method

Abstract

The invention discloses a crystallizer foot roller deformation detection device and method, the device comprises a base plate (1), an outer cylinder (5), a second spring (6), a slider (7), a baffle (9), a measuring wheel (11), a rotating shaft (12), a support rod (13), a second distance meter (14), an inner cylinder (15), a first distance meter (18), and a first spring (19). The invention has a simple structure, convenient installation, and simple operation, and realizes real-time measurement of the wear amount and wear unevenness of the crystallizer foot roller (10) and the measuring wheel (11), and the measurement is accurate and reliable.

Description

Technical Field

[0001] The invention belongs to the field of continuous casting, and in particular relates to a device and method for detecting deformation of a crystallizer foot roll. Background Art

[0002] In the continuous casting process, the crystallizer is a key equipment that condenses molten steel and forms a layer of solid shell on the surface. If the high-temperature thin-shell billet leaving the crystallizer is not cooled and supported in time, it is very easy to bulge and deform under the static pressure of the molten steel, and it is also easy to cause accidents such as steel leakage. Therefore, a crystallizer foot roller is provided. The surface of the crystallizer foot roller is in direct contact with the surface of the billet, which plays a guiding and supporting role for the billet.

[0003] At present, if the spacing between the foot rollers of the crystallizer is too small, it will cause the ingot to sink. If the spacing between the foot rollers of the crystallizer is too large, it will cause bulging. If the foot rollers of the crystallizer do not rotate or rotate inflexibly, relative sliding will occur between the ingot and the foot rollers. During the billet drawing process, the surface temperature of the foot rollers is high, causing the surface hardness to decline. If the foot rollers of the crystallizer do not rotate, the surface will be greatly deformed when subjected to large sliding friction resistance, and some iron oxide scale and slag will accumulate here. Under high temperature and pressure, the iron oxide scale slag gathers to form a hard slag pile, which causes scratches on the ingot when the slag pile slides relative to the ingot.

[0004] As can be seen from the above, the quality of the mold foot roll directly affects the surface quality of the cast slab. However, the current judgment of the quality of the mold foot roll mainly relies on manual visual inspection, and it is impossible to form a quantitative indicator for judgment, resulting in many slab quality defects on site. Summary of the invention

[0005] The purpose of the present invention is to provide a crystallizer foot roller deformation detection device and method. The present invention has a simple structure, is easy to install, and is simple to operate. It realizes real-time measurement of the wear amount and wear unevenness of the crystallizer foot roller (10) and the measuring wheel (11), and the measurement is accurate and reliable.

[0006] The technical solution adopted by the present invention is:

[0007] A crystallizer foot roll deformation detection device comprises a fixedly mounted substrate (1), an inner cylinder (15) and a first distance meter (18) are provided on the front side of the substrate (1), a slider (7) is slidably matched in the front part of the inner cylinder (15), and a first spring (19) is provided at the rear part, the first spring (19) applies a forward force to the slider (7), the first distance meter (18) is located in the inner cylinder (15) and directly faces the rear end of the slider (7), a support rod (13) and a second distance meter (14) are provided at the front end of the slider (7), and the support rod (13) and the second distance meter (14) are provided at the front end of the slider (7). ) is provided with a measuring wheel (11) for fitting with the crystallizer foot roller (10) at the front end thereof via a rotating shaft (12); a second distance meter (14) is directly opposite to the rear center of the measuring wheel (11); an outer cylinder (5) is slidably matched with the outer front of the inner cylinder (15); and a second spring (6) is sleeved on the rear of the inner cylinder (15); the second spring (6) applies a forward force to the outer cylinder (5); a baffle (9) is provided at the front end of the outer cylinder (5); the baffle (9) is used to fit with the rear side of the crystallizer foot roller (10) and enclose a closed space; the measuring wheel (11) is located in the closed space.

[0008] Furthermore, it also comprises a retractable dust cover (3), the dust cover (3) being simultaneously covered on the inner tube (15) and the outer tube (5), the front end of the dust cover (3) being sealed and fixed on the outer tube (5), and the rear end of the dust cover (3) being sealed and fixed on the inner tube (15).

[0009] Furthermore, the front end of the dust cover (3) is fixed to the outer cylinder (5) via a steel hoop (4), and the rear end is fixed to the base plate (1) via a binding belt (2).

[0010] Furthermore, baffles (9) are provided on the upper, lower, left and right sides of the front end of the outer cylinder (5), the baffles (9) on the upper and lower sides are biased towards the center, and the baffles (9) on the left and right sides have grooves adapted to the foot rollers (10) of the crystallizer.

[0011] Furthermore, an annular groove is provided at the rear of the outer cylinder (5), and the second spring (6) extends into the annular groove and abuts against the inner end surface of the annular groove.

[0012] Furthermore, the first distance meter (18) is mounted in a mounting hole (17) at a central position of the base plate (1), and the second distance meter (14) is mounted in a positioning hole (8) at a central position of the slider (7).

[0013] Furthermore, the rear end of the inner cylinder (15) is fixedly connected to the base plate (1) via a flange and bolts (16).

[0014] Furthermore, two ends of the first spring (19) are respectively fixed on the base plate (1) and the slider (7), and two ends of the second spring (6) are respectively fixed on the inner cylinder (15) and the outer cylinder (5).

[0015] A method for detecting deformation of a mold foot roller, using the above-mentioned crystallizer foot roller deformation detection device, assuming that the initial distance between the first distance meter (18) and the surface of the crystallizer foot roller (10) is L, and the actual measured distance between the first distance meter (18) and the surface of the crystallizer foot roller (10) is L 实 , the measured distance between the first distance meter (18) and the rear end of the slider (7) is a, the distance between the rear end of the slider (7) and the second distance meter (14) is b, the measured distance between the second distance meter (14) and the rear center of the measuring wheel (11) is x, the distance between the second distance meter (14) and the center of the rotating shaft (12) is c, the initial radius of the measuring wheel (11) is R, and the measured radius of the measuring wheel (11) is r, then L 实 =a+b+x+2r, replace r with cx, then we have L 实 = a+b+2c-x; real-time comparison L 实 and L, and the wear condition of the mold foot roller (10) is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; cx is compared with R in real time, and the wear condition of the measuring wheel (11) is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; the maximum value x of x when the measuring wheel (11) rotates one circle driven by the mold foot roller (10) is recorded. 最大 and the minimum value x 最小 According to the difference between the two values, the uneven wear of the measuring wheel (11) is obtained and an alarm is issued when the uneven wear is serious; the maximum value a of a when the mold foot roller (10) rotates one circle driven by the slab is recorded. 最大 and the minimum value a 最小 The wear unevenness of the mold foot roller (10) is obtained based on the difference between the two values, and an alarm is triggered when the wear unevenness is serious.

[0016] Furthermore, during detection, the data processing flow is:

[0017] S1. The device starts after receiving the "continuous casting machine starts pouring" signal, and the first distance meter (18) and the second distance meter (14) start working;

[0018] S2. Real-time comparison L 实 When the difference between L and L is greater than d, the device alarms and displays the difference, where d is the allowable wear range of the crystallizer foot roller (10); otherwise, proceed to the next step;

[0019] S3. Real-time comparison of cx and R. When the difference between the two is greater than e, the device alarms and displays the difference, where e is the allowable wear range of the measuring wheel (11); otherwise, proceed to the next step;

[0020] S4. Record the maximum value x of x when the measuring wheel (11) rotates one circle driven by the crystallizer foot roller (10) 最大 and the minimum value x 最小When the difference between the two is greater than f, the device alarms and displays the difference, where f is the range of allowable wear unevenness of the measuring wheel (11); otherwise, the next step is entered;

[0021] S5. Record the maximum value of a when the mold foot roller (10) rotates one circle driven by the slab. 最大 and the minimum value a 最小 When the difference between the two is greater than k, the device alarms and displays the difference, where k is the range of allowable wear unevenness of the crystallizer foot roller (10); otherwise, proceed to the next step;

[0022] S6. If the device receives a "continuous casting machine stops pouring" signal, it stops, and the first distance meter (18) and the second distance meter (14) stop working; otherwise, jump to step S2.

[0023] The beneficial effects of the present invention are:

[0024] The present invention has a simple structure, is easy to install and is easy to operate. The present invention realizes close contact between the measuring wheel (11) and the crystallizer foot roller (10) through the sliding structure of the inner cylinder (15) and the outer cylinder (5) and the action force of the first spring (19), thereby ensuring the accuracy and reliability of the measurement. The present invention makes the baffle (9) and the crystallizer foot roller (10) fit closely through the action force of the baffle (9) and the second spring (6), so that the cooling water, protective slag, iron sheet and other debris on the surface of the crystallizer foot roller (10) can be scraped off to maintain the accuracy of the measurement. In the present invention, the measuring wheel (11) is located in the closed space surrounded by the baffle (9), thereby preventing water vapor and debris from entering the outer cylinder (5), thereby improving the working environment and service life. In the present invention, a combination of the first distance meter (18) and the second distance meter (14) is adopted to realize real-time and accurate measurement of the wear amount and wear unevenness of the crystallizer foot roller (10) and the wear amount and wear unevenness of the measuring wheel (11), thereby laying a foundation for improving the quality of the slab. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the crystallizer foot roller deformation detection device in an embodiment of the present invention.

[0026] Figure 2 4 is a side view of a crystallizer foot roller deformation detection device in an embodiment of the present invention.

[0027] Figure 3 1. It is an A-direction view of the crystallizer foot roller deformation detection device in an embodiment of the present invention.

[0028] Figure 4 It is a B-direction view of the crystallizer foot roller deformation detection device in an embodiment of the present invention.

[0029] In the figure: 1-base plate; 2-binding belt; 3-dust cover; 4-steel hoop; 5-outer cylinder; 6-second spring; 7-slider; 8-positioning hole; 9-baffle; 10-crystallizer foot roller; 11-measuring wheel; 12-rotating shaft; 13-support rod; 14-second distance meter; 15-inner cylinder; 16-bolt; 17-mounting hole; 18-first distance meter; 19-first spring. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figures 1 to 4 As shown, a crystallizer foot roller deformation detection device comprises a fixedly installed base plate 1, an inner cylinder 15 and a first rangefinder 18 are provided on the front side of the base plate 1, a slider 7 is slidably matched in the front part of the inner cylinder 15, and a first spring 19 is provided at the rear part, the first spring 19 applies a forward force to the slider 7, the first rangefinder 18 is located in the inner cylinder 15 and is opposite to the rear end of the slider 7, a support rod 13 and a second rangefinder 14 are provided at the front end of the slider 7, a measuring wheel 11 for fitting the crystallizer foot roller 10 is installed at the front end of the support rod 13 through a rotating shaft 12, the second rangefinder 14 is opposite to the rear center of the measuring wheel 11, an outer cylinder 5 is slidably matched in the front part of the inner cylinder 15, and a second spring 6 is sleeved at the rear part, the second spring 6 applies a forward force to the outer cylinder 5, a baffle 9 is provided at the front end of the outer cylinder 5, the baffle 9 is used to fit on the rear side of the crystallizer foot roller 10 and enclose a closed space, and the measuring wheel 11 is located in the closed space.

[0032] like Figures 1 to 4 As shown, in this embodiment, a retractable dust cover 3 is also included. The dust cover 3 is simultaneously covered on the inner tube 15 and the outer tube 5. The front end of the dust cover 3 is sealed and fixed on the outer tube 5, and the rear end is sealed and fixed on the inner tube 15. When the outer tube 5 moves forward and backward, the sealing between the inner tube 15 and the outer tube 5 can be effectively guaranteed, and the oxidation or corrosion of the second spring 6 can be avoided, thereby improving the service life.

[0033] like Figures 1 to 4 As shown, in this embodiment, the front end of the dust cover 3 is fixed to the outer tube 5 by a steel hoop 4, and the rear end is fixed to the base plate 1 by a binding belt 2, which is convenient for installation.

[0034] like Figures 1 to 4 As shown, in this embodiment, baffles 9 are provided on the upper, lower, left and right sides of the front end of the outer cylinder 5. The baffles 9 on the upper and lower sides are biased toward the center, and the baffles 9 on the left and right sides have grooves adapted to the foot rollers 10 of the crystallizer.

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, an annular groove is provided at the rear of the outer cylinder 5, and the second spring 6 extends into the annular groove and abuts against the inner end surface of the annular groove.

[0036] like Figure 1 and Figure 2 As shown, in this embodiment, the first distance meter 18 is installed in the installation hole 17 at the center of the substrate 1, and the second distance meter 14 is installed in the positioning hole 8 at the center of the slider 7.

[0037] like Figure 1 and Figure 2 As shown, in this embodiment, the rear end of the inner cylinder 15 is fixed to the base plate 1 through a flange and bolts 16.

[0038] like Figure 1 and Figure 2 As shown, in this embodiment, two ends of the first spring 19 are fixed on the base plate 1 and the slider 7 respectively, and two ends of the second spring 6 are fixed on the inner cylinder 15 and the outer cylinder 5 respectively.

[0039] In this embodiment, the base plate 1 is installed on the base of the continuous casting machine.

[0040] A method for detecting deformation of a mold foot roller, using the above-mentioned crystallizer foot roller deformation detection device, assuming that the initial distance between the first distance meter 18 and the surface of the crystallizer foot roller 10 is L, the actual distance between the first distance meter 18 and the surface of the crystallizer foot roller 10 is L 实 , the measured distance of the first distance meter 18 to the rear end of the slider 7 is a, the distance from the rear end of the slider 7 to the second distance meter 14 is b, the measured distance of the second distance meter 14 to the rear center of the measuring wheel 11 is x, the distance from the second distance meter 14 to the center of the rotating shaft 12 is c, the initial radius of the measuring wheel 11 is R, and the measured radius of the measuring wheel 11 is r, then L 实 =a+b+x+2r, replace r with cx, then we have L 实 = a+b+2c-x; real-time comparison L 实 and L, and the wear condition of the mold foot roller 10 is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; cx is compared with R in real time, and the wear condition of the measuring wheel 11 is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; the maximum value x of x when the measuring wheel 11 rotates one circle driven by the mold foot roller 10 is recorded 最大 and the minimum value x 最小 According to the difference between the two values, the uneven wear of the measuring wheel 11 is obtained and an alarm is issued when the uneven wear is serious; the maximum value a of a when the foot roller 10 of the crystallizer rotates one circle driven by the slab is recorded 最大 and the minimum value a 最小 According to the difference between the two, the uneven wear of the crystallizer foot roller 10 is obtained and an alarm is issued when the uneven wear is serious.

[0041] During detection, the data processing flow is:

[0042] S1. The device starts after receiving the "continuous casting machine pouring" signal, and the first rangefinder 18 and the second rangefinder 14 start working;

[0043] S2. Real-time comparison L 实 When the difference between L and L is greater than d, the device alarms "the foot roller of the crystallizer is seriously worn and needs to be replaced" and displays the difference. d is the allowable wear range of the foot roller 10 of the crystallizer, which is generally 0-0.5mm; otherwise, proceed to the next step;

[0044] S3. Compare cx and R in real time. When the difference between the two is greater than e, the device alarms "the measuring wheel is seriously worn and needs to be replaced" and displays the difference. e is the allowable wear range of the measuring wheel 11, which is generally 0-1mm. Otherwise, proceed to the next step.

[0045] S4. Record the maximum value x of x when the measuring wheel 11 rotates one circle driven by the crystallizer foot roller 10. 最大 and the minimum value x 最小 , one cycle time is 5-10s. When the difference between the two is greater than f, the device alarms "the measuring wheel is unevenly worn and the measuring wheel needs to be replaced" and displays the difference. f is the range of allowable uneven wear of the measuring wheel 11, which is generally 0-0.2mm; otherwise, proceed to the next step;

[0046] S5. Record the maximum value of a when the mold foot roller 10 rotates one circle driven by the slab. 最大 and the minimum value a 最小 , one cycle time is 20-30s. When the difference between the two is greater than k, the device alarms "the crystallizer foot roller is unevenly worn and the crystallizer foot roller needs to be replaced" and displays the difference. k is the range of allowable wear unevenness of the crystallizer foot roller 10, which is generally 0-0.4mm; otherwise, proceed to the next step;

[0047] S6. If the device receives the "continuous casting machine stops pouring" signal, it stops, and the first distance meter 18 and the second distance meter 14 stop working; otherwise, jump to step S2.

[0048] The present invention has a simple structure, is easy to install and is easy to operate. The present invention realizes close contact between the measuring wheel 11 and the crystallizer foot roller 10 through the sliding structure of the inner cylinder 15 and the outer cylinder 5 and the action force of the first spring 19, thereby ensuring the accuracy and reliability of the measurement. The present invention makes the baffle 9 fit closely with the crystallizer foot roller 10 through the action force of the baffle 9 and the second spring 6, and can scrape off the cooling water, protective slag, iron sheet and other debris on the surface of the crystallizer foot roller 10 to maintain the accuracy of the measurement. In the present invention, the measuring wheel 11 is located in the closed space surrounded by the baffle 9, which prevents water vapor and debris from entering the outer cylinder 5, thereby improving the working environment and service life. In the present invention, a combination of the first rangefinder 18 and the second rangefinder 14 is adopted to realize real-time and accurate measurement of the wear amount and wear unevenness of the crystallizer foot roller 10 and the wear amount and wear unevenness of the measuring wheel 11, laying a foundation for improving the quality of the slab.

[0049] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A crystallizer foot roller deformation detection device, characterized in that: The invention comprises a fixedly mounted substrate (1), wherein an inner cylinder (15) and a first rangefinder (18) are provided on the front side of the substrate (1), a slider (7) is slidably fitted in the front portion of the inner cylinder (15), and a first spring (19) is provided at the rear portion, wherein the first spring (19) applies a forward force to the slider (7), the first rangefinder (18) is located in the inner cylinder (15) and directly faces the rear end of the slider (7), a support rod (13) and a second rangefinder (14) are provided at the front end of the slider (7), and the front end of the support rod (13) is connected to the slider (7) by a rotating shaft. (12) is provided with a measuring wheel (11) for fitting with the crystallizer foot roller (10), the second distance meter (14) is directly opposite to the rear center of the measuring wheel (11), the outer front of the inner cylinder (15) is slidably matched with the outer cylinder (5), and the rear is sleeved with a second spring (6), the second spring (6) applies a forward force to the outer cylinder (5), and a baffle (9) is provided at the front end of the outer cylinder (5), the baffle (9) is used to fit the rear side of the crystallizer foot roller (10) and enclose a closed space, and the measuring wheel (11) is located in the closed space.

2. The mold foot roller deformation detection device according to claim 1, characterized in that: It also includes a retractable dust cover (3), which is simultaneously sleeved on the inner tube (15) and the outer tube (5), with the front end of the dust cover (3) being sealed and fixed on the outer tube (5), and the rear end of the dust cover (3) being sealed and fixed on the inner tube (15).

3. The mold foot roller deformation detection device according to claim 2, characterized in that: The front end of the dust cover (3) is fixed to the outer cylinder (5) through a steel hoop (4), and the rear end is fixed to the base plate (1) through a binding belt (2).

4. The mold foot roller deformation detection device according to claim 1, characterized in that: Baffles (9) are provided on the upper, lower, left and right sides of the front end of the outer cylinder (5), the upper and lower baffles (9) are biased toward the center, and the left and right baffles (9) have grooves adapted to the crystallizer foot rollers (10).

5. The mold foot roller deformation detection device according to claim 1, characterized in that: An annular groove is provided at the rear of the outer cylinder (5), and the second spring (6) extends into the annular groove and abuts against the inner end surface of the annular groove.

6. The mold foot roller deformation detection device according to claim 1, characterized in that: The first distance meter (18) is mounted in a mounting hole (17) at a central position of the base plate (1), and the second distance meter (14) is mounted in a positioning hole (8) at a central position of the slider (7).

7. The mold foot roller deformation detection device according to claim 1, characterized in that: The rear end of the inner cylinder (15) is fixedly connected to the base plate (1) via a flange and bolts (16).

8. The mold foot roller deformation detection device according to claim 1, characterized in that: Two ends of the first spring (19) are respectively fixed on the base plate (1) and the slider (7), and two ends of the second spring (6) are respectively fixed on the inner cylinder (15) and the outer cylinder (5).

9. A method for detecting deformation of a mold foot roller, characterized in that: The crystallizer foot roller deformation detection device as claimed in any one of claims 1 to 8 is used, and the initial distance between the first distance meter (18) and the surface of the crystallizer foot roller (10) is L, and the actual measured distance between the first distance meter (18) and the surface of the crystallizer foot roller (10) is L. 实 , the measured distance between the first distance meter (18) and the rear end of the slider (7) is a, the distance between the rear end of the slider (7) and the second distance meter (14) is b, the measured distance between the second distance meter (14) and the rear center of the measuring wheel (11) is x, the distance between the second distance meter (14) and the center of the rotating shaft (12) is c, the initial radius of the measuring wheel (11) is R, and the measured radius of the measuring wheel (11) is r, then L 实 =a+b+x+2r, replace r with cx, then we have L 实 = a+b+2c-x; real-time comparison L 实 and L, and the wear condition of the mold foot roller (10) is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; cx is compared with R in real time, and the wear condition of the measuring wheel (11) is obtained according to the difference between the two, and an alarm is sounded when the wear is serious; the maximum value x of x when the measuring wheel (11) rotates one circle driven by the mold foot roller (10) is recorded. 最大 and the minimum value x 最小 According to the difference between the two values, the uneven wear of the measuring wheel (11) is obtained and an alarm is issued when the uneven wear is serious; the maximum value a of a when the mold foot roller (10) rotates one circle driven by the slab is recorded. 最大 and the minimum value a 最小 The wear unevenness of the mold foot roller (10) is obtained based on the difference between the two values, and an alarm is triggered when the wear unevenness is serious.

10. The method for detecting deformation of a mold foot roller according to claim 9, characterized in that: During detection, the data processing flow is: S1. The device starts after receiving the "continuous casting machine pouring" signal, and the first rangefinder (18) and the second rangefinder (14) start working; S2. Real-time comparison L 实 When the difference between L and L is greater than d, the device alarms and displays the difference, where d is the allowable wear range of the crystallizer foot roller (10); otherwise, proceed to the next step; S3. Real-time comparison of cx and R. When the difference between the two is greater than e, the device alarms and displays the difference, where e is the allowable wear range of the measuring wheel (11); otherwise, proceed to the next step; S4. Record the maximum value x of x when the measuring wheel (11) rotates one circle driven by the crystallizer foot roller (10) 最大 and the minimum value x 最小 When the difference between the two is greater than f, the device alarms and displays the difference, where f is the range of allowable wear unevenness of the measuring wheel (11); otherwise, the next step is entered; S5. Record the maximum value of a when the mold foot roller (10) rotates one circle driven by the slab. 最大 and the minimum value a 最小 When the difference between the two is greater than k, the device alarms and displays the difference, where k is the range of allowable wear unevenness of the crystallizer foot roller (10); otherwise, proceed to the next step; S6. If the device receives a "continuous casting machine stops pouring" signal, it stops, and the first distance meter (18) and the second distance meter (14) stop working; otherwise, jump to step S2.

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