Rapid roller changing device for three-roller centering mechanism of steel pipe ultrasonic flaw detection equipment

Abstract

The utility model relates to a quick roll changing device for a three-roll centering mechanism of steel tube ultrasonic flaw detection equipment, which comprises a transmission shaft, a mounting cylinder, a gland and a roller, the transmission shaft is mounted in the mounting cylinder, the left end of the transmission shaft is movably connected with the gland through a slider, the roller is sleeved at the left end of the mounting cylinder, and the gland is fixedly connected with the roller; the roller comprises a first outer ring, a second outer ring and an inner ring, the inner ring is clamped at the left end of the transmission shaft, the first outer ring and the second outer ring are in conical surface fit, the inner surface of the first outer ring is conical, and the outer surface of the second outer ring is conical; the gland, the first outer ring and the second outer ring are fixed through screws. According to the split type roller, only the first outer ring of the roller needs to be detached, the abraded roller can be rapidly replaced, and the roller replacing efficiency is improved by 75%; the transmission shaft is connected with the gland through the square copper sliding block, and the service life is prolonged by 50% due to the strength of the square copper sliding block.

Description

Technical Field

[0001] This utility model relates to the technical field of non-destructive testing equipment for steel pipes, specifically to a quick roller changing device for a three-roller centering mechanism in ultrasonic flaw detection equipment for steel pipes. Background Technology

[0002] Ultrasonic flaw detection equipment for steel pipes is a specialized device that uses ultrasonic technology to automatically detect internal and external defects in steel pipes. It identifies defects such as cracks, pores, and inclusions by utilizing the reflection, refraction, and scattering characteristics of high-frequency sound waves, offering high efficiency, accuracy, and non-destructive testing. It is applied in industrial settings for quality control of various steel pipes, including oil and gas pipelines, building structural pipes, and pressure vessel pipes, as well as in the military field for defect detection of high-end military steel pipes such as those used in missile launchers and naval components.

[0003] The existing NC-GUT114 ultrasonic flaw detection equipment for steel pipes is an offline automated inspection device. This equipment can meet the production requirements for ultrasonic flaw detection of hot-rolled seamless steel pipes with diameters ranging from Ф48 to Ф114.3mm, and its overall design and scheme comply with relevant national and ministerial standards. However, the existing ultrasonic flaw detection equipment requires disassembling and removing the reducer and drive shaft entirely to replace the clamping rollers of its three-roll centering mechanism. Replacing 12 outer ring rollers each time requires 8 people working for 8 hours. Furthermore, the drive shaft and the pressure cap are connected by a round copper sleeve and a 6mm flat key, resulting in low connection strength, short service life, and a high failure rate, severely restricting production pace.

[0004] Therefore, how to design a quick roller changing device to avoid the problems of difficult and time-consuming disassembly and assembly of rollers has become a technical problem that urgently needs to be solved by those in the field. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a quick roller changing device for the three-roller centering mechanism of ultrasonic flaw detection equipment for steel pipes. This device solves the problems of difficult disassembly and replacement of rollers, long time consumption, and low connection strength, short service life, and high failure rate between the drive shaft and the pressure plate through flat key and round connection. It also has a simple structure.

[0006] The technical problem solved by this utility model is achieved through the following technical solution:

[0007] A quick roller changing device for a three-roller centering mechanism in an ultrasonic flaw detection equipment for steel pipes includes a drive shaft, an mounting cylinder, a pressure cap, and rollers. The drive shaft is installed inside the mounting cylinder, and the left end of the drive shaft is movably connected to the pressure cap via a slider. The rollers are fitted onto the left end of the mounting cylinder and located at the right end of the pressure cap. The pressure cap is fixedly connected to the rollers.

[0008] The roller includes a first outer ring, a second outer ring, and an inner ring. A first bearing is installed between the second outer ring and the inner ring. The inner ring is clamped onto the left end of the drive shaft. The first outer ring and the second outer ring are in a tapered fit. The inner surface of the first outer ring is tapered, with its cone tip facing the right end of the drive shaft. The outer surface of the second outer ring is tapered, with its cone tip facing one end of the pressure cap. The cone tip of the first outer ring contacts the cone tail of the second outer ring. The cone tail of the first outer ring and the cone tip of the second outer ring are on the same plane. The pressure cap, the first outer ring, and the second outer ring are fixed by screws.

[0009] Furthermore, a first retaining ring and a sealing roller are installed on the right end of the first bearing.

[0010] Furthermore, the right end of the drive shaft is mounted inside the mounting cylinder via a second bearing and a third bearing.

[0011] Furthermore, a second retaining ring is installed on the right end of the third bearing to seal the drive shaft.

[0012] Furthermore, the slider is a square copper slider, which is fitted onto the left end of the drive shaft.

[0013] The advantages and positive effects of this utility model are:

[0014] 1. The present invention relates to a split roller in the three-roller centering mechanism quick roller changing device of the ultrasonic flaw detection equipment for steel pipes. The roller is designed as a first outer ring, a second outer ring, and an inner ring. The inner surface of the first outer ring and the outer surface of the second outer ring are conical, and the inner surface of the first outer ring and the outer surface of the second outer ring are conical mating surfaces. The gland, the first outer ring, and the second outer ring are fixed and installed by hexagonal socket head cap screws. Only the first outer ring of the roller needs to be removed, so that the worn first outer ring of the roller can be quickly replaced. This facilitates the operator to replace the roller regularly, saves maintenance time, improves detection accuracy, and eliminates the need to disassemble and remove the roller, drive shaft, and reducer before the roller can be replaced.

[0015] 2. The first and second outer rings of the three-roller centering mechanism quick roller changing device of the ultrasonic flaw detection equipment for steel pipes of this utility model are both made of 304 stainless steel. The first and second outer rings are conical and meet the requirements of use in harsh environments such as water corrosion on site. The weight is reduced by 50% and the cost is reduced by 30%.

[0016] 3. The transmission shaft and pressure cover of the three-roller centering mechanism quick roller changing device of the ultrasonic flaw detection equipment for steel pipes of this utility model are connected by a square copper slider, which replaces the original round copper sleeve and flat key structure. The strength of the square copper slider is improved and its service life is extended by 50%.

[0017] 4. The three-roller centering mechanism quick roller changing device of the ultrasonic flaw detection equipment for steel pipes of this utility model solves the problems of difficult disassembly and replacement of rollers, long time consumption, and low connection strength, short service life and high failure rate of the connection between the drive shaft and the pressure plate through the round copper sleeve and flat key structure. Moreover, the structure is simple and easy to implement. The replacement of 12 rollers each time is reduced from 8 people * 8 hours to 4 people * 4 hours, and the roller replacement efficiency is improved by 75%. At the same time, the monthly downtime is reduced by 4 hours. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes of this utility model;

[0019] Figure 2 This is a schematic diagram of the drive shaft and roller assembly of the three-roller centering mechanism in the ultrasonic flaw detection equipment for steel pipes of this utility model.

[0020] Figure 3 This is a cross-sectional schematic diagram of the assembly of the drive shaft and rollers in the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes of this utility model.

[0021] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0022] In the picture:

[0023] 1-Slider, 2-Pressure cap, 3-First outer ring, 4-Second outer ring, 5-First bearing, 6-First retaining ring, 7-Screw, 8-Inner ring, 9-Mounting cylinder, 10-Drive shaft, 11-Second bearing, 12-Second retaining ring, 13-Third bearing, 14-Roller, 15-Gear motor. Detailed Implementation

[0024] The present invention will be further described in detail below through specific embodiments. The following embodiments are only descriptive and not limiting, and should not be used to limit the protection scope of the present invention.

[0025] like Figures 1 to 4 As shown, a quick roller changing device for a three-roller centering mechanism of an ultrasonic flaw detection equipment for steel pipe includes a drive shaft 10, an mounting cylinder 9, a pressure cover 2, and a roller 14. The drive shaft 10 is installed inside the mounting cylinder 9. The left end of the drive shaft 10 is movably connected to the pressure cover 2 via a slider 1. The roller 14 is fitted onto the left end of the mounting cylinder 9 and located at the right end of the pressure cover 2. The pressure cover 2 is fixedly connected to the roller 14.

[0026] The roller 14 includes a first outer ring 3, a second outer ring 4, and an inner ring 8. A first bearing 5 is installed between the second outer ring 4 and the inner ring 8. The inner ring 8 is clamped on the left end of the drive shaft 10. The first outer ring 3 and the second outer ring 4 are in a conical fit. The inner surface of the first outer ring 3 is conical, with its cone tip facing the right end of the drive shaft 10. The outer surface of the second outer ring 4 is conical, with its cone tip facing one end of the pressure cap 2. The cone tip of the first outer ring 3 contacts the cone tail of the second outer ring 4. The cone tail of the first outer ring 3 and the cone tip of the second outer ring 4 are on the same plane. The pressure cap 2, the first outer ring 3, and the second outer ring 4 are fixed by hexagonal socket head cap screws 7. The first outer ring 3 and the second outer ring 4 are both made of 304 stainless steel. The conical fit between the first outer ring 3 and the second outer ring 4 meets the requirements for use in harsh environments such as water corrosion, reducing weight by 50% and cost by 30%.

[0027] The first retaining ring 6 is installed on the right end of the first bearing 5, and the sealing roller 14 is installed. The right end of the transmission shaft 10 is installed in the mounting cylinder 9 through the second bearing 11 and the third bearing 13. The right end of the third bearing 13 is installed with the second retaining ring 12 to seal the transmission shaft 10. The slider 1 is a square copper slider 1, which is fitted on the left end of the transmission shaft 10.

[0028] This utility model relates to a quick roller changing device for a three-roller centering mechanism in an ultrasonic flaw detection equipment for steel pipes. It solves the problems of difficult disassembly and replacement of roller 14, long time consumption, and low connection strength, short service life, and high failure rate between the transmission shaft 10 and the pressure cap 2, which are connected by a round copper sleeve and a flat key structure. Moreover, the structure is simple and easy to implement.

[0029] The left end of the drive shaft 10 of the quick roller changing device of the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes of this utility model is connected to the pressure cover 2 through the square copper slider 1. The roller 14 is designed as a first outer ring 3, a second outer ring 4 and an inner ring 8. The inner surface of the first outer ring 3 and the outer surface of the second outer ring 4 are conical. The inner surface of the first outer ring 3 and the outer surface of the second outer ring 4 are conical mating surfaces. The pressure cover 2, the first outer ring 3 and the second outer ring 4 are fixedly installed by the internal hexagonal flower-shaped cylindrical head screws 7.

[0030] With the split roller 14, only the first outer ring 3 of the roller 14 needs to be removed to quickly replace the worn first outer ring 3 of the roller 14. This makes it convenient for operators to replace the roller 14 regularly, saves maintenance time, improves detection accuracy, and eliminates the need to disassemble and remove the roller 14, drive shaft 10 and reducer before the roller 14 can be replaced.

[0031] The drive shaft 10 and the pressure cap 2 are connected by a square copper slider 1, which replaces the original round copper sleeve and flat key structure. The strength of the square copper slider 1 increases its service life, and the service life of the square copper slider 1 is extended by 50%.

[0032] Combining the above structure, the time required to replace 12 rollers 14 is reduced from 8 people * 8 hours to 4 people * 4 hours, improving the efficiency of roller replacement by 75%. At the same time, the downtime per month is reduced by 4 hours.

[0033] The working principle of this utility model:

[0034] The right end of the drive shaft 10 is installed inside the mounting cylinder 9 via the second bearing 11 and the third bearing 13. The left end of the drive shaft 10 is movably connected to the pressure cap 2 via the square copper slider 1. The roller 14 is fitted onto the left end of the mounting cylinder 9 and located at the right end of the pressure cap 2. The pressure cap 2 and the roller 14 are fixedly connected by the internal hexagonal flower-shaped cylindrical head screw 7. The torque is transmitted to the inner ring 8 of the roller 14 through the pressure cap 2. The right end of the drive shaft 10, located outside the mounting cylinder 9, is connected to the reduction motor 15. The above three sets of mechanisms constitute a three-roller centering mechanism. The reduction motor 15 drives the drive shaft 10 to rotate and drives the roller 14 to rotate, thereby centering the steel pipe and performing ultrasonic flaw detection.

[0035] Although embodiments and drawings of the present invention have been disclosed for illustrative purposes, those skilled in the art will understand that various substitutions, variations and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A quick roller changing device for a three-roller centering mechanism in an ultrasonic flaw detection equipment for steel pipes, characterized in that: It includes a drive shaft (10), a mounting cylinder (9), a pressure cap (2), and a roller (14). The drive shaft (10) is installed inside the mounting cylinder (9). The left end of the drive shaft (10) is movably connected to the pressure cap (2) through a slider (1). The roller (14) is fitted on the left end of the mounting cylinder (9) and located at the right end of the pressure cap (2). The pressure cap (2) is fixedly connected to the roller (14). The roller (14) includes a first outer ring (3), a second outer ring (4) and an inner ring (8). A first bearing (5) is installed between the second outer ring (4) and the inner ring (8). The inner ring (8) is clamped on the left end of the drive shaft (10). The first outer ring (3) and the second outer ring (4) are in conical fit. The inner surface of the first outer ring (3) is conical, and its cone tip faces the right end of the drive shaft (10). The outer surface of the second outer ring (4) is conical, and its cone tip faces one end of the cover (2). The cone tip of the first outer ring (3) contacts the cone tail of the second outer ring (4). The cone tail of the first outer ring (3) and the cone tip of the second outer ring (4) are in the same plane. The cover (2), the first outer ring (3) and the second outer ring (4) are fixed by screws (7).

2. The quick roller changing device for the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes according to claim 1, characterized in that: The first bearing (5) is fitted with a first retaining ring (6) and a sealing roller (14).

3. The rapid roller changing device for the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes according to claim 1, characterized in that: The right end of the drive shaft (10) is mounted in the mounting cylinder (9) via the second bearing (11) and the third bearing (13).

4. The quick roller changing device for the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes according to claim 3, characterized in that: The right end of the third bearing (13) is fitted with a second retaining ring (12) to seal the drive shaft (10).

5. The quick roller changing device for the three-roller centering mechanism of the ultrasonic flaw detection equipment for steel pipes according to claim 1, characterized in that: The slider (1) is a square copper slider (1), which is mounted on the left end of the drive shaft (10).

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