Clamp of turbine flaw detector

Abstract

The clamp of the turbine flaw detector comprises a clamp body, the clamp body is provided with a containing cavity for containing a tubular forge piece, the bottom face of the inner wall of the containing cavity is provided with an inserting groove for the tubular forge piece to be inserted, and the inserting groove is in abutting fit or clearance fit with the tubular forge piece; a plurality of centering pieces which are uniformly distributed along an annular array are detachably connected to the position, corresponding to the upper portion of the inserting groove, of the clamp body, the end of each centering piece is provided with an abutting part extending into the containing cavity, the surface of each abutting part is bent, each abutting part is movably connected with the corresponding centering piece in an elastic telescopic mode, and all the abutting parts abut against the outer wall of the tubular forge piece. According to the clamp of the turbine flaw detector, the abutting parts are matched with the inserting grooves to position and clamp the tubular forgings in the containing cavity, the applicability is good, the abutting parts are evenly distributed in an annular array mode, the tubular forgings are evenly stressed, the fixing stability of the clamp to the tubular forgings is improved, and it is guaranteed that flaw detection work is conducted smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a clamp of a turbine flaw detector. Background Art

[0002] At present, tubular forgings such as perforating bullet shells and perforating tubes usually have inner walls and outer walls. Before leaving the factory, flaw detection equipment is needed to detect the inner wall of the tubular forgings. The flaw detection equipment generally uses flaw detection sensors for detection. For example, the utility model patent with announcement number CN213068710U discloses a forging eddy current flaw detection fixture, including a workbench, a controller and a flaw detector are fixedly installed on the upper end of the workbench, a base is fixedly installed on the upper end of the workbench, a rotating fixed table is rotatably installed on the upper end of the base, the rotating fixed table rotates through a speed regulating motor, the upper end of the rotating fixed table fixes the forgings, and the upper end of the forgings is provided with an inner wall flaw detection sensor. Before flaw detection, the staff is required to place the tubular forgings to be detected on the fixture, and the fixture fixes and clamps the outer wall of the tubular forgings. However, different batches of tubular forgings of the same specification may have diameter length tolerances of the outer wall or uneven outer wall surfaces, resulting in poor positioning of the tubular forgings by the fixture, causing the tubular forgings to move relative to the fixture when impacted, affecting the flaw detection operation. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the above-mentioned technology and is designed to provide a turbine flaw detector fixture. Each abutment portion cooperates with the slot to position and clamp the tubular forging in the placement cavity. The utility model has good applicability, and each abutment portion is evenly distributed in a circular array, so that the force on the tubular forging is uniform, thereby improving the fixing stability of the fixture on the tubular forging and ensuring smooth flaw detection operations.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a fixture of a turbine flaw detector, including a fixture body, the fixture body having a placement cavity for placing a tubular forging, the inner wall bottom surface of the placement cavity is provided with a slot for inserting the tubular forging, the slot and the tubular forging are in abutment fit or clearance fit; the fixture body is detachably connected to a plurality of centering pieces evenly distributed along a circular array at an upper position corresponding to the slot, the end of the centering piece is provided with an abutment portion extending into the placement cavity, the surface of the abutment portion is curved, the abutment portion and its corresponding centering piece are elastically telescopically connected, and each of the abutment portions is tightly pressed against the outer wall of the tubular forging.

[0005] Preferably, a driving hole is penetrated through the clamp body at a position corresponding to the centering piece, and the driving hole is threadedly connected to the centering piece.

[0006] Preferably, an operating groove is formed on an end surface of the centering piece away from the abutting portion.

[0007] Preferably, the centering piece is provided with a sliding groove near the end surface of the placement cavity for the abutment part to be slidably connected, a limiting ring is formed on the opening side of the sliding groove for the abutment part to at least partially pass through, and an elastic part is arranged between the sliding groove and the abutment part.

[0008] Preferably, the number of the centering pieces is three.

[0009] Preferably, it also includes a workbench and a flaw detection device, wherein the workbench is provided with a base for rotatably connecting the fixture body, and a rotation drive device is provided under the base, and the movable end of the rotation drive device passes through the base and is fixedly connected to the fixture body; the workbench is provided with a translation mechanism and a lifting mechanism, and the translation mechanism drives the lifting mechanism to translate to approach or move away from the fixture body, and the flaw detection device is arranged on the lifting movable part of the lifting mechanism, and the lifting mechanism drives the flaw detection device to translate up and down to insert into or detach from the inner wall of the tubular forging.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model provides a clamp for a turbine flaw detector, wherein the abutment parts of each centering piece extend into a placement cavity, and when a tubular forging is inserted into the placement cavity, the tubular forging contacts with the surface of each abutment part, and each abutment part is pressed and retracted, so that the tubular forging can be smoothly moved down to the bottom of the placement cavity and plugged and matched with the slot. In this process, each abutment part always presses against the outer wall of the tubular forging, and each abutment part cooperates with the slot to position and clamp the tubular forging in the placement cavity, and has good applicability. Moreover, each abutment part is evenly distributed in an annular array, so that the force on the tubular forging is even, thereby improving the fixing stability of the clamp on the tubular forging and ensuring smooth progress of the flaw detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a fixture body and a tubular forging in an embodiment;

[0013] Figure 2 2 is a cross-sectional view of the fixture body and the tubular forging in the embodiment Figure 1 ;

[0014] Figure 3 2 is a cross-sectional view of the fixture body and the tubular forging in the embodiment Figure 2 ;

[0015] Figure 4 Schematic diagram of the structure of the clamp in the embodiment.

[0016] In the figure: 1. tubular forging; 2. fixture body; 201. placement cavity; 202. slot; 203. drive hole; 3. centering piece; 301. operating slot; 4. abutment portion; 5. slide groove; 6. limit ring; 7. elastic member; 8. workbench; 9. flaw detection device; 10. base; 11. rotation drive device; 12. translation mechanism; 13. lifting mechanism. DETAILED DESCRIPTION

[0017] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0018] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 A fixture of a turbine flaw detector includes a fixture body 2, a workbench 8 and a flaw detection device 9. The fixture body 2 has a placement cavity 201 for placing a tubular forging 1. A slot 202 is provided on the bottom surface of the inner wall of the placement cavity 201. The fixture body 2 is detachably connected to three centering pieces 3 evenly distributed along an annular array at an upper position corresponding to the slot 202. A slide groove 5 is provided on the end surface of the centering piece 3 close to the placement cavity 201. The slide groove 5 is slidably connected to an abutment portion 4. A limiting ring 6 is formed on the open side of the slide groove 5 for at least part of the abutment portion 4 to pass through. An elastic piece 7 is provided between the slide groove 5 and the abutment portion 4, so that the abutment portion 4 is elastically and telescopically connected to its corresponding centering piece 3, and the abutment portion 4 has a tendency to extend outward. The surface of the part of the abutment part 4 extending out of the limiting ring 6 is bent, and preferably, the abutment part 4 can be a spherical structure, the inner wall of the limiting ring 6 is abutted with the outer wall of the abutment part 4, and the inner ring diameter of the limiting ring 6 is smaller than the diameter of the abutment part 4. The centering piece 3, the abutment part 4 and the elastic piece 7 form a ball bolt structure. A driving hole 203 is penetrated at the position of the clamp body 2 corresponding to the centering piece 3, and the driving hole 203 is threadedly connected to the centering piece 3.

[0019] When the tubular forging 1 is inserted into the placement cavity 201, the tubular forging 1 contacts the surface of each abutment portion 4, and each abutment portion 4 is pressed back, so that the tubular forging 1 smoothly moves down to the bottom of the placement cavity 201 and plugs into the slot 202. The slot 202 contacts or gaps with the tubular forging 1 to restrict the tubular forging 1. In this process, each abutment portion 4 always contacts the outer wall of the tubular forging 1, and each abutment portion 4 cooperates with the slot 202 to position and clamp the tubular forging 1 in the placement cavity 201, which has good applicability, and each abutment portion 4 is evenly distributed in a circular array, so that the force on the tubular forging 1 is uniform, which improves the fixing stability of the fixture to the tubular forging 1 and ensures smooth flaw detection.

[0020] An operating groove 301 is provided on the end face of the centering piece 3 away from the abutment portion 4. Preferably, the operating groove 301 can be a square groove, a straight groove or a special-shaped groove, etc. The user can use a screwdriver tool compatible with the operating groove 301 to drive the centering piece 3 to screw in or out, thereby adjusting the length of the abutment portion 4 extending into the placement cavity 201, which is flexible to operate.

[0021] A base 10 for rotationally connecting the fixture body 2 is provided on the workbench 8, and a rotation driving device 11 is provided under the base 10. The rotation driving device 11 is a rotating motor, and the movable end of the rotation driving device 11 passes through the base 10 and is fixedly connected to the fixture body 2; a translation mechanism 12 and a lifting mechanism 13 are provided on the workbench 8. The translation mechanism 12 can be a linear driving device such as a telescopic cylinder and an electric push rod. The translation mechanism 12 drives the lifting mechanism 13 to translate to approach or move away from the fixture body 2. The lifting mechanism 13 can be a linear driving device such as a telescopic cylinder and an electric push rod. The flaw detection device 9 is arranged on the lifting movable part of the lifting mechanism 13. The lifting mechanism 13 drives the flaw detection device 9 to translate up and down to insert into or detach from the inner wall of the tubular forging 1. Preferably, the flaw detection device 9 shell is a flaw detection sensor. When the staff places the tubular forging 1 on the fixture body 2, each abutment portion 4 cooperates with the slot 202 to position and clamp the tubular forging 1 in the placement cavity 201, and the rotary drive device 11 drives the fixture body 2 to rotate to drive the tubular forging 1 to rotate. The flaw detection device 9 inserted into the inner wall of the tubular forging 1 performs a comprehensive flaw detection on the inner wall of the tubular forging 1, and the detection speed is fast.

[0022] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A fixture for a turbine flaw detector, characterized in that: The invention comprises a fixture body (2), wherein the fixture body (2) has a placement cavity (201) for placing a tubular forging (1), and the bottom surface of the inner wall of the placement cavity (201) is provided with a slot (202) for inserting the tubular forging (1), and the slot (202) and the tubular forging (1) are in abutment fit or clearance fit; the fixture body (2) is detachably connected to a plurality of centering pieces (3) evenly distributed along a circular array at an upper position corresponding to the slot (202), and an abutment portion (4) extending into the placement cavity (201) is provided at the end of the centering piece (3), and the surface of the abutment portion (4) is arranged to be bent, and the abutment portion (4) is elastically and telescopically connected to the corresponding centering piece (3), and each abutment portion (4) is tightly pressed against the outer wall of the tubular forging (1).

2. The fixture of a turbine flaw detector according to claim 1, characterized in that: A driving hole (203) passes through the clamp body (2) at a position corresponding to the centering piece (3), and the driving hole (203) is threadedly connected to the centering piece (3).

3. The fixture of a turbine flaw detector according to claim 2, characterized in that: An operating groove (301) is formed on the end surface of the centering piece (3) away from the abutting portion (4).

4. The fixture for a turbine flaw detector according to claim 1, characterized in that: The centering member (3) is provided with a sliding groove (5) on the end surface close to the placement cavity (201) for the abutment portion (4) to be slidably connected, and a limiting ring (6) is formed on the opening side of the sliding groove (5) for the abutment portion (4) to at least partially pass through, and an elastic member (7) is provided between the sliding groove (5) and the abutment portion (4).

5. The fixture of a turbine flaw detector according to claim 1, characterized in that: The number of the centering pieces (3) is three.

6. The fixture for a turbine flaw detector according to claim 1, characterized in that: The invention also comprises a workbench (8) and a flaw detection device (9), wherein the workbench (8) is provided with a base (10) for rotationally connecting the clamp body (2), and a rotation driving device (11) is provided under the base (10), and the movable end of the rotation driving device (11) passes through the base (10) and is fixedly connected to the clamp body (2); the workbench (8) is provided with a translation mechanism (12) and a lifting mechanism (13), and the translation mechanism (12) drives the lifting mechanism (13) to translate so as to approach or move away from the clamp body (2), and the flaw detection device (9) is arranged on the lifting movable part of the lifting mechanism (13), and the lifting mechanism (13) drives the flaw detection device (9) to translate up and down so as to be inserted into or separated from the inner wall of the tubular forging (1).

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