Test fixture of elbow eddy current testing machine

Abstract

The utility model discloses a test fixture of an elbow eddy current testing machine, which structurally comprises a test platform, a plurality of bases distributed on the test platform, rotatable sleeves arranged on the bases, reference lines arranged at the central positions of the sleeves, and a plurality of tensioning blocks arranged at the top of the sleeves. The plurality of tensioning blocks elastically expand outwards or elastically contract inwards by taking the reference line as a central position, a plurality of movable blocks are arranged on the test platform, the number of the movable blocks is consistent with that of the bases, and the moving directions of the plurality of movable blocks are respectively and correspondingly close to or far away from the tensioning blocks; according to the utility model, a tolerance gap between the probe and the bent pipe is avoided, so that the problem of friction between the probe and the bent pipe is solved, and the service life of the probe is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of production technology of pipe bending testing equipment, and more specifically, to a test fixture for a pipe bending eddy current testing machine. Background Technology

[0002] Currently, the original pipe eddy current testing equipment uses external clamping for product fixation. Due to differences in product shape, there is a deviation between the detection position and the probe axis after clamping. During testing, there is sliding friction between the probe and the product, resulting in severe probe wear, which affects the measurement accuracy and probe lifespan. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a test fixture for a bent pipe eddy current testing machine.

[0004] To achieve the above objectives, this utility model provides a test fixture for a bent pipe eddy current testing machine. Its structure includes a test platform, and its innovation lies in the following: several bases are distributed on the test platform, and each base is provided with a rotatable sleeve. The center position of the sleeve is set as a baseline, and several tension blocks are provided on the top of the sleeve. The tension blocks elastically expand outward or elastically contract inward with the baseline as the center position. Several movable blocks are provided on the test platform, and the number of movable blocks is the same as the number of bases. The movement direction of the movable blocks corresponds to moving closer to or away from the tension blocks.

[0005] Furthermore, the aforementioned test platform is circular, and several fixing slots are provided on the test platform. With the center of the test platform as the center point, several fixing slots are distributed in a circle on the test platform. The top of the fixing slot is provided with an upper bearing seat, and the bottom of the sleeve is rotatably mounted on the upper bearing seat.

[0006] Furthermore, the top of the aforementioned sleeve is provided with a connecting tube, the top of which is provided with a conical arc surface. The bottom of several tensioning blocks abuts against the arc surface, and a sleeve groove is formed at the center of the tensioning blocks. Several ring springs are provided inside the sleeve groove from top to bottom, and the tensioning blocks are fixed on the outside of the ring springs.

[0007] Furthermore, the connection between the aforementioned connecting pipe and sleeve is provided with a stepped surface for bearing the end face of the bend.

[0008] Furthermore, the sleeve is equipped with a pull rod that can move up and down. The top of the pull rod passes through the sleeve and the sleeve groove in sequence until it extends to the top of the tensioning block. The top of the pull rod is equipped with a pressure block. When the pull rod moves downward, the pressure block is guided into the inside of the sleeve groove, causing several tensioning blocks to elastically expand outward with the baseline as the center position. When the pull rod moves upward, the pressure block is discharged out of the inside of the sleeve groove, causing several tensioning blocks to elastically contract inward with the baseline as the center position.

[0009] Furthermore, the bottom of the aforementioned pressure block is provided with an inverted conical guide surface, the bottom of which extends into the inside of the sleeve groove.

[0010] Furthermore, the bottom of the aforementioned pull rod extends below the fixing groove, and a lower bearing seat is provided at the bottom of the fixing groove. The pull rod is movably mounted inside the lower bearing seat. A drive gear is provided at the bottom of the pull rod, and an extension block extends downward from the center of the drive gear. A buffer spring is fitted onto the pull rod, and the buffer spring is located between the drive gear and the lower bearing seat.

[0011] Furthermore, when the aforementioned drive gear rotates, the pull rod rotates inside the lower bearing housing, and the pull rod synchronously drives the sleeve to rotate.

[0012] Furthermore, the lower bearing housing is provided with a rotatable ring inside, and the ring and sleeve are provided with several guide grooves inside. The tie rod is provided with several guide plates on its outer side, and the guide plates are slidably disposed inside the guide grooves.

[0013] Furthermore, the aforementioned movable block is equipped with rotatable guide wheels, the height of which is aligned with the step surface.

[0014] The technical effects and advantages of this utility model are as follows: By using the inner hole to clamp the bent tube, this utility model ensures the consistency of the clamping position of all bent tubes, avoids the tolerance gap between the probe and the bent tube, thus solving the problem of friction between the probe and the bent tube and improving the service life of the probe. Attached Figure Description

[0015] Figure 1 This is an isometric view of the front of this utility model.

[0016] Figure 2 This is an isometric view of the bottom of this utility model.

[0017] Figure 3 This is a structural diagram showing the connection between the sleeve, connecting pipe, and tie rod of this utility model.

[0018] Figure 4 This is a partial structural diagram of part A of the present invention.

[0019] Figure 5 This is a structural diagram of the end face of the tie rod connected inside the sleeve of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1 to 4 In one specific embodiment of this utility model, the structure includes a test platform 1, on which a plurality of bases 11 are distributed. Each base 11 is provided with a rotatable sleeve 12. The center position of the sleeve 12 is set as a baseline. The top of the sleeve 12 is provided with a plurality of tensioning blocks 14. The plurality of tensioning blocks 14 elastically expand outward or elastically contract inward with the baseline as the center position. The test platform 1 is provided with a plurality of movable blocks 15. The number of movable blocks 15 is the same as the number of bases 11. The movement direction of the plurality of movable blocks 15 corresponds to moving closer to or away from the tensioning blocks 14, respectively.

[0022] In this invention, the working principle of the eddy current test for the bent pipe is as follows: First, the tensioning block 14 is elastically contracted. Then, the inner hole at the bottom of the bent pipe is fitted onto the tensioning block 14. Next, the tensioning block 14 is elastically expanded outward, so that the inside of the bent pipe is tensioned and fixed by the tensioning block 14. Finally, the movable block 15 presses down on the bent pipe, so that the bent pipe remains stable. The external probe detects the bent pipe, and the bent pipe rotates synchronously, thereby realizing the all-round detection of the bent pipe.

[0023] This invention uses an inner hole to clamp the bent tube, thereby ensuring the consistency of all bent tube clamping positions, avoiding tolerance gaps between the probe and the bent tube, solving the problem of friction between the probe and the bent tube, and improving the service life of the probe.

[0024] In this utility model, as a preferred embodiment, the test platform 1 is circular, and a plurality of fixing slots 2 are provided on the test platform 1. With the center of the test platform 1 as the center point, the plurality of fixing slots 2 are distributed in a circle on the test platform 1. The top of the fixing slot 2 is provided with an upper bearing seat 21, and the bottom of the sleeve 12 is rotatably mounted on the upper bearing seat 21.

[0025] In this utility model, as a preferred embodiment, the top of the sleeve 12 is provided with a connecting tube 3, the top of the connecting tube 3 is provided with a conical arc surface 31, the bottom of a plurality of tensioning blocks 14 abuts against the arc surface 31, the center position of the plurality of tensioning blocks 14 forms a sleeve groove 32, the inside of the sleeve groove 32 is provided with a plurality of ring springs 33 from top to bottom, and the tensioning blocks 14 are fixed on the outside of the ring springs 33.

[0026] In this invention, the tensioning block 14 expands elastically outward or contracts elastically inward around the baseline as the center position through the ring spring 33, while the arc surface 31 ensures the stability of the tensioning block 14 abutting at the top of the connecting pipe 3.

[0027] In this utility model, as a preferred embodiment, the connection between the connecting pipe 3 and the sleeve 12 is provided with a stepped surface 4 for bearing the end face of the bent pipe.

[0028] In this invention, the end face of the bent pipe is supported on the stepped surface 4, which ensures the stability of the bent pipe clamping.

[0029] In this utility model, as a preferred embodiment, the sleeve 12 is provided with a pull rod 5 that can move up and down. The top of the pull rod 5 passes through the sleeve 12 and the sleeve groove 32 in sequence until it extends to the top of the tensioning block 14. The top of the pull rod 5 is provided with a pressure block 51. When the pull rod 5 moves downward, the pressure block 51 is inserted into the inside of the sleeve groove 32, so that the tensioning blocks 14 elastically expand outward with the baseline as the center position. When the pull rod 5 moves upward, the pressure block 51 is discharged out of the inside of the sleeve groove 32, so that the tensioning blocks 14 elastically contract inward with the baseline as the center position.

[0030] In this utility model, as a preferred embodiment, the bottom of the pressure block 51 is provided with an inverted conical guide surface 6, and the bottom of the guide surface 6 extends into the inside of the sleeve groove 32.

[0031] In this invention, the guide surface 6 is designed to facilitate the quick insertion of the pressure block 51 into the sleeve groove 32, thereby allowing the pressure block 51 to push the tension block 14 outward, so as to achieve elastic expansion of the tension blocks 14 outward with the baseline as the center position.

[0032] In this utility model, as a preferred embodiment, the bottom of the pull rod 5 extends below the fixing groove 2. The bottom of the fixing groove 2 is provided with a lower bearing seat 7. The pull rod 5 is movably disposed inside the lower bearing seat 7. The bottom of the pull rod 5 is provided with a drive gear 71. An extension block 72 extends downward from the center of the drive gear 71. A buffer spring 73 is sleeved on the pull rod 5. The buffer spring 73 is located between the drive gear 71 and the lower bearing seat 7.

[0033] In this invention, an external cylinder acts on the extension block 72, causing the pull rod 5 to move upward, thereby allowing the pressure block 51 to exit the interior of the sleeve groove 32. At this time, the buffer spring 73 is compressed between the lower bearing seat 7 and the drive gear 71. After the external cylinder and the pull rod 5 separate, the pull rod 5 can move downward under the elastic recovery of the buffer spring 73, thereby allowing the pressure block 51 to enter the interior of the sleeve groove 32 and push the tension block 14 outward.

[0034] In this utility model, as a preferred embodiment, when the drive gear 71 rotates, the pull rod 5 rotates inside the lower bearing seat 7 and the pull rod 5 synchronously drives the sleeve 12 to rotate.

[0035] In this invention, external power is applied to the drive gear 71, which drives the pull rod 5 to rotate. The pull rod 5 synchronously drives the sleeve 12 to rotate, thereby rotating the clamped bent pipe.

[0036] In this utility model, as a preferred embodiment, the lower bearing seat 7 is provided with a rotatable collar 8 inside, the collar 8 and the sleeve 12 are provided with a plurality of guide grooves 81 inside, and the pull rod 5 is provided with a plurality of guide plates 82 on the outside, and the guide plates 82 are slidably disposed inside the guide grooves 81.

[0037] In this utility model, the convenient pull rod 5 of the guide groove 81 and guide plate 82 can move up and down continuously inside the collar 8 and sleeve 12. At the same time, the guide plate 82 is limited inside the guide groove 81, which can ensure that the pull rod 5 can synchronously drive the collar 8 and sleeve 12 to rotate synchronously.

[0038] In this utility model, as a preferred embodiment, the movable block 15 is provided with a rotatable guide wheel 9, the height of which is aligned with the step surface 4.

[0039] In this invention, the guide wheel 9 presses the bent pipe onto the stepped surface 4. When the bent pipe rotates, the guide wheel 9 rotates synchronously, ensuring the stability of the bent pipe's rotation.

[0040] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0041] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0042] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test fixture for a bent pipe eddy current testing machine, the structure of which includes a test platform (1), characterized in that: The test platform (1) is provided with several bases (11), each base (11) is provided with a rotatable sleeve (12), the center position of the sleeve (12) is set as the baseline, the top of the sleeve (12) is provided with several tensioning blocks (14), the tensioning blocks (14) elastically expand outward or elastically contract inward with the baseline as the center position, the test platform (1) is provided with several movable blocks (15), the number of movable blocks (15) is the same as the number of bases (11), the movement direction of the movable blocks (15) corresponds to moving closer to or away from the tensioning blocks (14).

2. The test fixture for a bent pipe eddy current testing machine according to claim 1, characterized in that: The test platform (1) is circular, and a number of fixed slots (2) are provided on the test platform (1). With the center of the test platform (1) as the center point, a number of fixed slots (2) are distributed in a circle on the test platform (1). The top of the fixed slot (2) is provided with an upper bearing seat (21), and the bottom of the sleeve (12) is rotatably set on the upper bearing seat (21).

3. The test fixture for a bent pipe eddy current testing machine according to claim 2, characterized in that: The top of the sleeve (12) is provided with a connecting tube (3), the top of the connecting tube (3) is provided with a conical arc surface (31), the bottom of several tensioning blocks (14) abuts against the arc surface (31), the center position of several tensioning blocks (14) forms a sleeve groove (32), the inside of the sleeve groove (32) is provided with several ring springs (33) from top to bottom, and the tensioning blocks (14) are fixed to the outside of the ring springs (33).

4. The test fixture for a bent pipe eddy current testing machine according to claim 3, characterized in that: The connection between the connecting pipe (3) and the sleeve (12) is provided with a stepped surface (4) for bearing the end face of the bent pipe.

5. The test fixture for a bent pipe eddy current testing machine according to claim 3, characterized in that: The sleeve (12) is provided with a pull rod (5) that can move up and down. The top of the pull rod (5) passes through the sleeve (12) and the sleeve groove (32) in sequence until it extends to the top of the tensioning block (14). The top of the pull rod (5) is provided with a pressure block (51). When the pull rod (5) moves downward, the pressure block (51) is inserted into the inside of the sleeve groove (32), so that the tensioning blocks (14) elastically expand outward with the reference line as the center position. When the pull rod (5) moves upward, the pressure block (51) is discharged out of the inside of the sleeve groove (32), so that the tensioning blocks (14) elastically contract inward with the reference line as the center position.

6. The test fixture for a bent pipe eddy current testing machine according to claim 5, characterized in that: The bottom of the pressure block (51) is provided with an inverted conical guide surface (6), the bottom of which extends into the inside of the sleeve groove (32).

7. The test fixture for a bent pipe eddy current testing machine according to claim 5, characterized in that: The bottom of the pull rod (5) extends below the fixed groove (2). The bottom of the fixed groove (2) is provided with a lower bearing seat (7). The pull rod (5) is movably disposed inside the lower bearing seat (7). The bottom of the pull rod (5) is provided with a drive gear (71). An extension block (72) extends downward from the center of the drive gear (71). A buffer spring (73) is sleeved on the pull rod (5). The buffer spring (73) is located between the drive gear (71) and the lower bearing seat (7). When the drive gear (71) rotates, the pull rod (5) rotates inside the lower bearing seat (7) and the pull rod (5) synchronously drives the sleeve (12) to rotate.

8. The test fixture for a pipe bending eddy current testing machine according to claim 7, characterized in that: The lower bearing seat (7) is provided with a rotatable collar (8), and the collar (8) and the sleeve (12) are provided with a number of guide grooves (81). The pull rod (5) is provided with a number of guide plates (82) on its outer side, and the guide plates (82) are slidably disposed inside the guide grooves (81).

9. The test fixture for a bent pipe eddy current testing machine according to claim 4, characterized in that: The movable block (15) is provided with a rotatable guide wheel (9), the height of which is aligned with the step surface (4).

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