Guide sleeve sealing ring, sealing device for ultrasonic testing of steel pipes and ultrasonic flaw detector

Abstract

This utility model discloses a guide sleeve sealing ring, a sealing device for ultrasonic flaw detection of steel pipes, and an ultrasonic flaw detector. The guide sleeve sealing ring includes a sealing body, a sealing lip, and a supporting frame. The sealing body has an annular structure extending radially. The sealing lip is connected to the inner circumference of the sealing body and is used to seal and hold the steel pipe. The inner side of the sealing lip has a through hole for the steel pipe to pass through. The supporting frame is embedded in the sealing body. This utility model is used for installation in the spindle of an ultrasonic flaw detector and is applicable to ultrasonic flaw detection of steel pipes with thickened ends.

Description

Technical Field

[0001] This utility model relates to a guide sleeve sealing ring, a sealing device for ultrasonic testing of steel pipes, and an ultrasonic testing machine. Background Technology

[0002] Currently, an ultrasonic flaw detector is a device used for ultrasonic flaw detection of steel pipes. The ultrasonic flaw detector has a rotatable, hollow main shaft with two guide sleeves installed inside. The steel pipe extends into the inside of the main shaft and passes through the two guide sleeves, forming a water cavity between the two guide sleeves for filling with coupling water. For example, a probe-rotating ultrasonic flaw detection device disclosed in Chinese Patent No. CN103278563A has two guide sleeves in the main shaft with a water cavity between them. The guide sleeves are generally made of nylon and have high rigidity. The inner diameter of the guide sleeve is generally 1 mm larger than the outer diameter of the steel pipe. When the steel pipe passes through the two guide sleeves, coupling water needs to be continuously injected into the water cavity so that excess coupling water flows out through the gap between the guide sleeves and the steel pipe. Since the gap between the steel pipe and the guide sleeves is very small, only 1 mm, the continuously injected coupling water can dynamically fill the water cavity and the gap, forming an effective coupling water layer, thus enabling the introduction of ultrasonic waves.

[0003] However, existing guide sleeves are unsuitable for ultrasonic testing of steel pipes with thickened ends. This is because thickened steel pipes consist of two parts: the thickened end and the pipe body. The outer diameter of the thickened end is larger than that of the pipe body. To allow the thickened end to pass smoothly through the guide sleeve, the inner diameter of the guide sleeve needs to be enlarged. After the thickened end passes through the guide sleeve, the pipe body must also pass through. This results in an excessively large gap between the guide sleeve and the pipe body, causing the coupling water in the water cavity to flow out rapidly through this gap. Consequently, the coupling water cannot fill the water cavity and form an effective coupling water layer, hindering coupling and ultrasonic wave introduction, thus preventing the ultrasonic testing from proceeding normally. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a guide sleeve sealing ring, which is used to be installed in the spindle of an ultrasonic flaw detector and is applicable to ultrasonic flaw detection of steel pipes with thickened pipe ends.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a guide sleeve sealing ring, comprising:

[0006] A sealing body, wherein the sealing body is an annular structure and extends radially;

[0007] A sealing lip is connected to the inner circumference of the sealing body and is used to seal and hold the steel pipe. The inner side of the sealing lip is provided with a through hole for the steel pipe to pass through.

[0008] A support frame is embedded within the sealing body.

[0009] Furthermore, the sealing body and the sealing lip are integrally formed.

[0010] Further, a specific structure of the sealing lip is provided, wherein the tip of the sealing lip protrudes axially from the sealing body and tilts inward.

[0011] A further provision provides a specific structure for the through hole, wherein the through hole is a tapered hole.

[0012] A further specific structure of the support frame is provided, the support frame including an annular support body and an arc groove provided on the annular support body.

[0013] Furthermore, multiple arc grooves are arranged sequentially at intervals along the circumference, and the arc grooves penetrate the annular support body along the axial direction.

[0014] This utility model also provides a sealing device for ultrasonic testing of steel pipes, including a hollow main shaft and two guide sleeve sealing rings as described above.

[0015] Two guide sleeve sealing rings are installed at intervals on the inner side of the main shaft, and the outer periphery of the sealing body in the guide sleeve sealing ring is connected to the main shaft;

[0016] A water cavity is formed between the two guide sleeve sealing rings.

[0017] Furthermore, the main shaft is provided with a detection hole that communicates with the water cavity and is used for the insertion of an ultrasonic probe.

[0018] Furthermore, the main shaft is provided with a first positioning step and a second positioning step;

[0019] The first positioning step abuts against the outer periphery of the sealing body of one of the guide sleeve sealing rings;

[0020] The second positioning step abuts against the outer periphery of the sealing body of the other guide sleeve sealing ring.

[0021] This utility model also provides an ultrasonic flaw detector, including the sealing device for ultrasonic flaw detection of steel pipes as described above.

[0022] The above technical solution involves a thickened steel pipe with a thickened end and a pipe body. The outer diameter of the thickened end is larger than the outer diameter of the pipe body, while the diameter of the through hole is smaller than the outer diameter of the pipe body. Two guide sleeve sealing rings are installed in the spindle of the ultrasonic flaw detector, forming a water cavity between them. When the thickened end of the steel pipe passes through the through hole, the sealing lip and the inner circumference of the sealing body deform outward to allow the thickened end to pass smoothly. As the thickened end passes through the through hole, the sealing lip grips it and forms a seal. When the steel pipe passes through the through hole, the sealing lip contracts inward and deforms, thus gripping the steel pipe and forming a seal. This prevents the coupling water in the water cavity from flowing out rapidly, allowing the coupling water to fill the water cavity and form an effective coupling water layer. This facilitates coupling and the introduction of ultrasonic waves, ensuring the normal operation of ultrasonic flaw detection. Therefore, the guide sleeve sealing ring of this embodiment is suitable for ultrasonic flaw detection of steel pipes with thickened ends. Furthermore, compared to using a simple rubber sealing ring, which lacks rigidity and is easily deformed, the rubber sealing ring may fail to retain the coupling water in the water cavity as the spindle speed of the ultrasonic flaw detector increases, leading to the destruction of the coupling water layer. In this embodiment, a support frame is embedded in the sealing body. This support frame increases the support strength of the sealing body, giving it a certain rigidity. Therefore, even as the spindle speed of the ultrasonic flaw detector increases, the coupling water in the water cavity can still be retained, preventing the coupling water layer from being destroyed. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the guide sleeve sealing ring of this utility model;

[0024] Figure 2 This is a schematic diagram of the supporting frame of this utility model;

[0025] Figure 3 This is a schematic diagram of the sealing device for ultrasonic flaw detection of steel pipes according to the present invention.

[0026] In the figure: 1. Sealing body; 2. Sealing lip; 3. Through hole; 4. Support frame; 5. Thickened end of steel pipe; 6. Steel pipe body; 7. Main shaft; 8. Water cavity; 9. Annular support; 10. Arc groove; 11. Guide sleeve sealing ring; 12. Ultrasonic probe; 13. Detection hole; 14. First positioning step; 15. Second positioning step; 16. First fixing sleeve; 17. Second fixing sleeve. Detailed Implementation

[0027] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Example 1: As Figures 1-3 As shown, a guide sleeve sealing ring includes:

[0029] A sealing body 1, wherein the sealing body 1 is an annular structure and extends radially;

[0030] A sealing lip 2 is connected to the inner circumference of the sealing body 1 and is used to seal and hold the steel pipe. The inner side of the sealing lip 2 is provided with a through hole 3 for the steel pipe to pass through.

[0031] Support frame 4 is embedded in the sealing body 1.

[0032] Specifically, the thickened steel pipe has a thickened end 5 and a pipe body 6. The outer diameter of the thickened end 5 is larger than the outer diameter of the pipe body 6, while the diameter of the through hole 3 is smaller than the outer diameter of the pipe body 6. Two guide sleeve sealing rings 11 are installed in the spindle 7 of the ultrasonic flaw detector, and a water cavity 8 is formed between the two guide sleeve sealing rings 11. When the thickened end 5 passes through the through hole 3, the sealing lip 2 and the inner circumference of the sealing body 1 deform outward to allow the thickened end 5 to pass through smoothly. When the thickened end 5 passes through the through hole 3, the sealing lip 2 can hold the thickened end 5 tightly and form a seal. When the steel pipe body 6 passes through the through hole 3, the sealing lip 2 will shrink and deform inward and also be able to hold the steel pipe body 6 to form a seal, thereby preventing the coupling water in the water cavity 8 from flowing out quickly, so that the coupling water can fill the water cavity 8 and form an effective coupling water layer in the water cavity 8, thereby completing the coupling and ultrasonic wave introduction, ensuring the normal operation of ultrasonic flaw detection. Therefore, the guide sleeve sealing ring 11 of this application embodiment can be applied to ultrasonic flaw detection of steel pipes with thickened pipe ends.

[0033] Furthermore, compared to simply using a rubber sealing ring, which lacks rigidity and is easily deformed, the rubber sealing ring may fail to retain the coupling water in the water cavity 8 as the spindle speed of the ultrasonic flaw detector increases, leading to the destruction of the coupling water layer in the water cavity 8. In this embodiment, a support frame 4 is embedded within the sealing body 1. The support frame 4 enhances the support strength of the sealing body 1, giving it a certain degree of rigidity. This ensures that the coupling water in the water cavity 8 can still be retained even as the spindle speed of the ultrasonic flaw detector increases, preventing the coupling water layer in the water cavity 8 from being destroyed.

[0034] like Figure 1 As shown, the sealing body 1 and the sealing lip 2 are integrally formed, the sealing body 1 and the sealing lip 2 are made of rubber, and the support frame 4 can be embedded in the outer periphery of the sealing body 1.

[0035] like Figure 1 As shown, the tip of the sealing lip 2 protrudes axially from the sealing body 1 and tilts inward. The through hole 3 can be a tapered hole so that the steel pipe can pass through the through hole 3 more smoothly.

[0036] like Figure 2 As shown, the support frame 4 may include an annular support body 9 and an arc groove 10 provided on the annular support body 9. Multiple arc grooves 10 are arranged at intervals along the circumference and the arc grooves 10 penetrate the annular support body 9 along the axial direction. Specifically, the arc grooves 10 can reduce weight on the one hand and make the sealing body 1 and the support frame 4 more firmly connected on the other hand.

[0037] Example 2: Figure 3 As shown, a sealing device for ultrasonic testing of steel pipes includes a hollow spindle 7 and two guide sleeve sealing rings 11 as described in Embodiment 1.

[0038] Two guide sleeve sealing rings 11 are installed at intervals on the inner side of the main shaft 7, and the outer periphery of the sealing body 1 in the guide sleeve sealing ring 11 is connected to the main shaft 7;

[0039] A water cavity 8 is formed between the two guide sleeve sealing rings 11.

[0040] like Figure 3 As shown, the main shaft 7 may be provided with a detection hole 13 that communicates with the water cavity 8 and is used for the ultrasonic probe 12 to extend into; specifically, there are multiple detection holes 13 and they are distributed sequentially at intervals along the circumference of the main shaft 7.

[0041] like Figure 3 As shown, the main shaft 7 may be provided with a first positioning step 14 and a second positioning step 15. The first positioning step 14 abuts against the outer periphery of the sealing body 1 of one of the guide sleeve sealing rings 11, and the second positioning step 15 abuts against the outer periphery of the sealing body 1 of the other guide sleeve sealing ring 11. Specifically, the first positioning step 14 and the second positioning step 15 can be used to position the two guide sleeve sealing rings 11. The main shaft 7 may also be provided with a first fixing sleeve 16 and a second fixing sleeve 17. The first fixing sleeve 16 is used to press and fix the outer periphery of the sealing body 1 of one of the guide sleeve sealing rings 11 onto the first positioning step 14, and the second fixing sleeve 17 is used to press and fix the outer periphery of the sealing body 1 of the other guide sleeve sealing ring 11 onto the second positioning step 15.

[0042] Example 3: An ultrasonic flaw detector, including a sealing device for ultrasonic flaw detection of steel pipes as described in Example 2.

[0043] In summary, the thickened steel pipe has a thickened end 5 and a pipe body 6. The outer diameter of the thickened end 5 is larger than the outer diameter of the pipe body 6, while the diameter of the through hole 3 is smaller than the outer diameter of the pipe body 6. Two guide sleeve sealing rings 11 are installed in the spindle 7 of the ultrasonic flaw detector, forming a water cavity 8 between them. When the thickened end 5 passes through the through hole 3, the sealing lip 2 and the inner circumference of the sealing body 1 deform outwards to allow the thickened end 5 to pass smoothly. When the thickened end 5 passes through the through hole 3, the sealing lip 2 can grip the thickened end 5 and form a seal. When the steel pipe body 6 passes through the through hole 3, the sealing lip 2 contracts and deforms inward, thus clamping the steel pipe body 6 to form a seal. This prevents the coupling water in the water cavity 8 from flowing out quickly, allowing the coupling water to fill the water cavity 8 and form an effective coupling water layer. This enables coupling and ultrasonic wave introduction, ensuring the normal operation of ultrasonic flaw detection. Therefore, the guide sleeve sealing ring 11 of this embodiment is suitable for ultrasonic flaw detection of steel pipes with thickened ends. Furthermore, compared to using a simple rubber sealing ring, which lacks rigidity and is easily deformed, the rubber sealing ring may fail to retain the coupling water in the water cavity 8 when the spindle speed of the ultrasonic flaw detector increases, leading to the destruction of the coupling water layer in the water cavity 8. In this embodiment, a support frame 4 is embedded in the sealing body 1. The support frame 4 increases the support strength of the sealing body 1, giving it a certain rigidity. This allows the sealing body 1 to retain the coupling water in the water cavity 8 even when the spindle speed of the ultrasonic flaw detector increases, preventing the coupling water layer in the water cavity 8 from being destroyed.

[0044] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A bushing seal ring, characterized by, include: The sealing body (1) is an annular structure and extends radially; A sealing lip (2) is connected to the inner circumference of the sealing body (1) and is used to seal and hold the steel pipe. The inner side of the sealing lip (2) is provided with a through hole (3) for the steel pipe to pass through. Support frame (4), which is embedded in the sealing body (1).

2. The bushing seal ring of claim 1, wherein, The sealing body (1) and the sealing lip (2) are integrally formed.

3. The guide sleeve sealing ring according to claim 1, characterized in that, The tip of the sealing lip (2) protrudes axially from the sealing body (1) and tilts inward.

4. The guide sleeve sealing ring according to claim 1, characterized in that, The through hole (3) is a tapered hole.

5. The guide sleeve sealing ring according to claim 1, characterized in that, The support frame (4) includes an annular support (9) and an arc groove (10) provided on the annular support (9).

6. The guide sleeve sealing ring according to claim 5, characterized in that, The circular arc groove (10) is provided in multiple intervals along the circumference; The circular groove (10) penetrates the annular support (9) along the axial direction.

7. A sealing device for ultrasonic flaw detection of steel pipes, characterized in that, It includes a hollow spindle (7) and two guide sleeve seals (11) as described in any one of claims 1 to 6. Two guide sleeve sealing rings (11) are installed at intervals on the inner side of the main shaft (7), and the outer periphery of the sealing body (1) in the guide sleeve sealing ring (11) is connected to the main shaft (7); A water cavity (8) is formed between the two guide sleeve sealing rings (11).

8. The sealing device for ultrasonic flaw detection of steel pipes according to claim 7, characterized in that, The main shaft (7) is provided with a detection hole (13) that communicates with the water cavity (8) and is used for the ultrasonic probe (12) to extend into.

9. The sealing device for ultrasonic flaw detection of steel pipes according to claim 7, characterized in that, The main shaft (7) is provided with a first positioning step (14) and a second positioning step (15); The first positioning step (14) abuts against the outer periphery of the sealing body (1) of one of the guide sleeve sealing rings (11); The second positioning step (15) abuts against the outer periphery of the sealing body (1) of the other guide sleeve sealing ring (11).

10. An ultrasonic flaw detector, characterized in that, It includes a sealing device for ultrasonic testing of steel pipes as described in any one of claims 7 to 9.

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