A crack detector

Abstract

The utility model relates to detection equipment technical field, propose a kind of crack detector, including shell;Detection main part, set in the inside of shell, for detecting the crack of measured object;At least one roller assembly, rotatably set on the shell;At least one damping member, one end is connected with at least one roller assembly, the other end is connected with the shell, for increasing the resistance of roller assembly relative to the shell rotation, make the detection main part uniform velocity motion relative to measured object.In the utility model, since roller assembly rolls relative to shell through damping member, the external force needed for roller assembly rolling is larger, in this way, when operator moves relative to measured object surface through roller assembly, additional thrust needs to be applied, the uniform velocity motion of detection main part can be optimized, to avoid sudden acceleration or deceleration of roller assembly due to uneven surface of measured object, improve the flaw detection precision of detection main body in measured object.

Description

Technical Field

[0001] This utility model relates to the field of detection equipment technology, and in particular to a crack detector with damping. Background Technology

[0002] Crack detectors are core equipment in the field of industrial non-destructive testing, used to identify surface and internal cracks in materials or structures, ensuring that products can operate with good mechanical properties for a long time. Crack detectors sense eddy current disturbances caused by cracks through changes in coil impedance, enabling the location and depth measurement of cracks in metal structures.

[0003] A flaw detection device for inspecting the quality of ship steel structures, disclosed in publication number CN 214174363 U, describes a scheme in which a probe moves along the surface of an object being inspected via a roller to detect whether there are scratches on the surface. However, in this scheme, the movement of the roller is driven by an operator. Since the probe is manually driven to move relative to the object being inspected, if the probe cannot maintain a uniform speed relative to the object, it will affect the detection results and the probe's detection outcome.

[0004] Therefore, a damped crack detector is proposed to increase the resistance of the roller motion, thereby solving the technical problem that the existing technology cannot make the probe move at a constant speed relative to the object being detected, and thus improving the detection accuracy of the probe. Utility Model Content

[0005] In view of this, this utility model proposes a damped crack detector, which solves the technical problem that the existing technology cannot make the probe move at a constant speed relative to the object being detected, and can improve the detection accuracy of the probe.

[0006] This utility model proposes a crack detector, comprising: case; The detection body, located inside the casing, is used to detect cracks in the object being tested; At least one roller assembly is rotatably mounted on the housing; At least one damping element, one end of which is connected to the at least one roller assembly and the other end of which is connected to the housing, is used to increase the resistance of the roller assembly to rotation relative to the housing, so that the detection body moves at a constant speed relative to the object being measured.

[0007] Based on the above technical solution, preferably, the at least one damping component includes a damping box and a damping shaft, the damping box and the damping shaft are damped and rotatably connected, the damping box or the damping shaft is fixedly connected to a roller assembly, and the damping shaft or the damping box is fixedly connected to the housing, for the purpose of damping the roller assembly to the housing.

[0008] Based on the above technical solution, preferably, the roller assembly is connected to the damping box, and the damping shaft is connected to the housing, so as to enable the damping box and the roller assembly to rotate synchronously relative to the housing.

[0009] Based on the above technical solution, preferably, the at least one damping element further includes: An anti-rotation component is fixedly mounted on the housing at one end and sleeved on the outer surface of the damping shaft at the other end. The anti-rotation component connects the damping shaft and the housing and is used to prevent the damping shaft from rotating relative to the housing.

[0010] Based on the above technical solution, preferably, the at least one damping element further includes: A protective housing covers the outside of the damping box, one end of the protective housing abuts against one side of the roller assembly, and the other end of the protective housing is rotatably connected to the housing.

[0011] Based on the above technical solution, preferably, the end of the protective shell away from the roller assembly extends along its own axis; The at least one damping element further includes: The first rotating component has one part sleeved on the protruding end of the protective shell and the other part rotatably embedded in the shell. The first rotating component rotatably connects the protruding end of the protective shell and the shell.

[0012] Based on the above technical solution, preferably, the roller assembly includes: The hub is fitted onto one side of the damping box and rotates synchronously with the damping box; The second rotating component is partially disposed on the side of the hub away from the damping box, and the other part is rotatably connected to the anti-rotation component. The second rotating component rotatably connects the hub and the anti-rotation component.

[0013] Based on the above technical solution, preferably, the roller assembly further includes: A flexible ring is fitted onto the hub and used to hold the object being measured against the surface.

[0014] Based on the above technical solution, preferably, the housing includes: The cover is hollow inside and forms a space for accommodating the detection body and at least one damping element; A base plate is placed over the opening of the cover to seal the cover. At least one through hole is provided on the base plate. The at least one roller assembly and the at least one damping element are rotatably disposed on the base plate, and the roller assembly passes through the through hole to contact the surface of the object being measured.

[0015] Based on the above technical solution, preferably, the detection subject includes The circuit board is horizontally mounted on the base plate; Several detection probes are electrically connected to the circuit board and arranged in a rectangular array to form multiple detection areas.

[0016] The crack detector provided by this utility model has the following advantages compared with the prior art: (1) Since the roller assembly rolls relative to the housing through the damping component, the roller assembly requires a large external force to roll. As a result, when the operator moves relative to the surface of the object being tested through the roller assembly, an additional thrust needs to be applied. This can optimize the uniform movement of the detection body and avoid the roller assembly from suddenly accelerating or decelerating due to the unevenness of the surface of the object being tested, thereby improving the flaw detection accuracy of the detection body on the object being tested. (2) In order to increase the weight of the roller assembly, the roller assembly rotates relative to the housing through the damping box. In this way, the external force driving the roller assembly is larger, which can also increase the resistance of the initial rotation of the roller assembly. (3) The first rotating component makes one end of the damping box rotate to the housing, and the other end of the damping box rotates to the housing through the damping shaft, which can ensure that the roller assembly can still rotate normally under the pressure of external force. (4) The flexible ring has good flexibility and increases the friction with the surface of the object being measured, which can prevent the roller assembly from sliding relative to the object being measured, allowing the damper to play a good role. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a bottom view of a crack detector according to the present invention; Figure 2 for Figure 1 Sectional perspective view at point AA; Figure 3 This is a perspective view of the rolling assembly and damping component installed on the base plate in this utility model; Figure 4 This is a separate diagram of the rolling assembly and the damping component in this utility model; Figure 5 This is a perspective view of the hub of a crack detector according to this utility model.

[0019] Figure descriptions: 1. Housing; 11. Cover; 12. Base plate; 1201. Through hole; 2. Detector body; 21. Circuit board; 22. Detector probe; 3. Rolling assembly; 31. Hub; 3101. Connecting groove; 32. Second rotating component; 33. Flexible ring; 4. Damping component; 41. Damping box; 42. Damping shaft; 43. Anti-rotation component; 44. Protective outer shell; 45. First rotating component. Detailed Implementation

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

[0021] In existing flaw detection devices, the rollers move quite flexibly. Since the probe's movement relative to the object being inspected is manually driven, if the probe's movement relative to the object cannot be kept at a constant speed, it will affect the detection results and the probe's overall performance. Therefore, if... Figure 1 and Figure 2 As shown, this utility model provides a crack detector, comprising: Casing 1; The detection body 2 is set inside the housing 1 and is used to detect cracks in the object being tested; At least one roller assembly 3 is rotatably mounted on the housing 1; At least one damping element 4, one end of which is connected to the at least one roller assembly 3 and the other end of which is connected to the housing 1, is used to increase the resistance of the roller assembly 3 to rotation relative to the housing 1, so that the detection body 2 moves at a constant speed relative to the object being measured.

[0022] Since the roller assembly 3 rolls relative to the housing 1 through the damping element 4, the external force required for the roller assembly 3 to roll is relatively large. As a result, when the operator moves the roller assembly 3 relative to the surface of the object being tested, an additional thrust needs to be applied. This can optimize the uniform movement of the detection body 2, so as to avoid the roller assembly 3 suddenly accelerating or decelerating due to the unevenness of the surface of the object being tested, thereby improving the flaw detection accuracy of the detection body 2 on the object being tested.

[0023] The at least one damping element 4 includes a damping box 41 and a damping shaft 42. The damping box 41 and the damping shaft 42 are rotatably connected. The damping box 41 or the damping shaft 42 is fixedly connected to the roller assembly 3. The damping shaft 42 or the damping box 41 is fixedly connected to the housing 1, so as to make the roller assembly 3 and the housing 1 dampedly connected.

[0024] Specifically, the damping component 4 is divided into two parts. It can be that the roller assembly 3 rotates relative to the housing 1 through the damping shaft 42, or the roller assembly 3 rotates relative to the housing 1 through the damping box 41. Here, in order to increase the weight of the roller assembly 3, the roller assembly 3 rotates relative to the housing 1 through the damping box 41. In this way, the external force driving the roller assembly 3 is larger, which can also increase the resistance of the initial rotation of the roller assembly 3.

[0025] Specifically, the damping component 4 is configured as a friction damping box. When the torque is transmitted to the friction plates inside the damping box 41, the damping effect is generated by the friction between the contacting friction plates, which converts mechanical energy into heat energy and dissipates it. The friction damping box is existing technology and will not be described in detail here.

[0026] like Figure 2 and Figure 4 As shown, in order to increase the mass of the roller assembly 3, the roller assembly 3 is connected to the damping box 41, and the damping shaft 42 is connected to the housing 1, so that the damping box 41 and the roller assembly 3 rotate synchronously relative to the housing 1.

[0027] like Figure 3 and Figure 4 As shown, in order to stabilize and fix the damping shaft 42 and the housing 1, and to prevent the damping shaft 42 from rotating relative to the housing 1, the at least one damping element 4 further includes: An anti-rotation component 43 is fixedly mounted on the housing 1 at one end and sleeved on the outer surface of the damping shaft 42 at the other end. The anti-rotation component 43 connects the damping shaft 42 and the housing 1 and is used to prevent the damping shaft 42 from rotating relative to the housing 1.

[0028] Specifically, the anti-rotation component 43 has a non-circular shape, such as... Figure 4 As shown, one end of the anti-rotation member 43 is semi-circular. The anti-rotation member 43 can be fixed to the housing 1 by a pressure strip, thereby preventing the anti-rotation member 43 from rotating relative to the housing 1.

[0029] like Figure 4 As shown, the damping shaft 42 is also configured in a semi-circular shape, and a corresponding anti-rotation hole is provided inside the anti-rotation member 43. When the damping shaft 42 is inserted into the anti-rotation hole, the damping shaft 42 cannot rotate relative to the anti-rotation member 43, thus achieving an anti-rotation connection between the damping shaft 42 and the housing 1. The semi-circular shape here is only one embodiment and is not considered a limitation of the technical solution. Correspondingly, the shapes of the anti-rotation member 43 and the damping shaft 42 can also be polygonal or gear-shaped.

[0030] Specifically, to prevent external foreign objects from entering the damping element 4 through the roller assembly 3, the at least one damping element 4 further includes: The protective housing 44 covers the outside of the damping box 41. One end of the protective housing 44 abuts against one side of the roller assembly 3, and the other end of the protective housing 44 is rotatably connected to the housing 1.

[0031] A portion of the damping box 41 is covered by the roller assembly 3, and another portion is covered by the protective shell 44, with the protective shell 44 abutting against the side of the roller assembly 3. This ensures that both completely cover the damping box 41, preventing foreign objects from entering the damping box 41. Additionally, the protective shell 44 can also increase the resistance to the initial rotation of the roller assembly 3.

[0032] To ensure that the roller assembly 3 and the damping box 41 rotate smoothly, the protective housing 44 extends along its own axis at the end away from the roller assembly 3. The at least one damping element 4 further includes: A first rotating member 45 is sleeved on the protruding end of the protective housing 44. The first rotating member 45 is configured as a first bearing, and a part of the first bearing is sleeved on the protruding end of the protective housing 44. The other part is embedded in the housing 1. The protruding end of the protective housing 44 is rotatably connected to the housing 1 through the first bearing.

[0033] Since the protective outer shell 44 is rotatably connected to the shell 1, both ends of the damping box 41 are rotatably connected to the shell 1. Since the crack detector is driven by the operator, it can be ensured that the roller assembly 3 can still rotate normally under the pressure of external force, so that the crack detector can move normally relative to the object being tested.

[0034] Specifically, to ensure that the roller assembly 3 stably drives the damping box 41 to rotate relative to the damping shaft 42, the roller assembly 3 includes: The hub 31 is fitted on one side of the damping box 41 and rotates synchronously with the damping box 41; The second rotating component 32 is disposed on the side of the hub 31 away from the damping box 41. The second rotating component 32 is configured as a second bearing. A part of the second bearing is disposed on the hub 31 and the other part is disposed on the anti-rotation component 43, so that the hub 31 and the anti-rotation component 43 are rotatably connected, which can ensure that the hub 31 rotates smoothly.

[0035] While the hub 31 is mounted on the outside of the damping box 41, it is also rotatably connected to the anti-rotation member 43 through the second bearing, which can ensure that the hub 31 stably drives the damping box 41 to rotate relative to the damping shaft 42.

[0036] like Figure 5As shown, in order to ensure that the hub 31 is fitted outside the damping box 41, a connecting groove 3101 adapted to the shape of the damping box 41 is provided inside the hub 31. Here, the shape of both the damping box 41 and the connecting groove 3101 is rectangular. The hub 31 can be directly fitted outside the damping box 41 through the connecting groove 3101 and the two can rotate synchronously relative to the damping shaft 42.

[0037] To prevent the hub 31 from slipping on the surface of the object being measured, the roller assembly 3 further includes: A flexible ring 33 is fitted onto the hub 31 and is used to abut against the surface of the object being measured.

[0038] Specifically, the flexible ring 33 is made of polyurethane, which has excellent flexibility and can play a non-slip role. When in contact with the object being tested, the flexible ring 33 can roll normally on the surface of the object being tested.

[0039] More specifically, the flexible ring 33 here is configured with polyurethane adhesive, and the hub 31 is integrally molded with the polyurethane adhesive, making the overall structure of the roller assembly 3 compact and occupying little space.

[0040] like Figure 1 and Figure 2 As shown, the housing 1 includes: The cover 11 is hollow inside and forms a space for accommodating the detection body 2 and at least one damping element 4; A base plate 12 is provided over the opening of the cover 11 to seal the cover 11. At least one through hole 1201 is provided on the base plate 12. At least one roller assembly 3 and at least one damping element 4 are rotatably disposed on the base plate 12, and the roller assembly 3 passes through the through hole 1201 to contact the surface of the object being measured.

[0041] Specifically, there are four roller assemblies 3, which are arranged in an array on the base plate 12, and the four roller assemblies 3 can roll synchronously on the same horizontal plane.

[0042] like Figure 2 As shown, to ensure detection accuracy, the detection body 2 includes The circuit board 21 is horizontally arranged on the base plate 12 and located within the receiving space of the cover 11; Several detection probes 22 are electrically connected to the circuit board 21 and are arranged in a rectangular array to form multiple detection areas.

[0043] Specifically, several detection probes 22 are densely distributed on the circuit board 21, forming a four-column array detection area, which can improve the flaw detection accuracy.

[0044] The working principle of this crack detector is as follows: the operator holds the cover 11 and brings the detection body 2 close to the area where the object being tested may have cracks. The operator pushes the cover 11, and the roller assembly 3 moves at a constant speed relative to the object being tested under the action of the damping component 4, so that the detection body 2 moves at a constant speed through the area where cracks may exist, thereby improving the flaw detection accuracy of the detection body 2.

[0045] 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 crack detector, characterized in that, include: Shell (1); The detection body (2) is set inside the shell (1) and is used to detect cracks in the object being tested; At least one roller assembly (3) is rotatably mounted on the housing (1); At least one damping element (4) is connected at one end to the at least one roller assembly (3) and at the other end to the housing (1) to increase the resistance of the roller assembly (3) to the rotation of the housing (1) so that the detection body (2) moves at a constant speed relative to the object being measured.

2. The crack detector as described in claim 1, characterized in that, The at least one damping element (4) includes a damping box (41) and a damping shaft (42), the damping box (41) and the damping shaft (42) are damped rotatably connected, the damping box (41) or the damping shaft (42) is fixedly connected to the roller assembly (3), and the damping shaft (42) or the damping box (41) is fixedly connected to the housing (1) for damping connection between the roller assembly (3) and the housing (1).

3. The crack detector as described in claim 2, characterized in that, The roller assembly (3) is connected to the damping box (41), and the damping shaft (42) is connected to the housing (1) to enable the damping box (41) and the roller assembly (3) to rotate synchronously relative to the housing (1).

4. The crack detector as described in claim 3, characterized in that, The at least one damping element (4) further includes: An anti-rotation component (43) is fixedly mounted on the housing (1) at one end and sleeved on the outer surface of the damping shaft (42) at the other end. The anti-rotation component (43) connects the damping shaft (42) and the housing (1) to prevent the damping shaft (42) from rotating relative to the housing (1).

5. The crack detector as described in claim 3, characterized in that, The at least one damping element (4) further includes: A protective housing (44) covers the outside of the damping box (41), one end of the protective housing (44) abuts against one side of the roller assembly (3), and the other end of the protective housing (44) is rotatably connected to the housing (1).

6. The crack detector as described in claim 5, characterized in that, The protective shell (44) extends along its own axis at one end away from the roller assembly (3); The at least one damping element (4) further includes: The first rotating component (45) is partially sleeved on the protruding end of the protective shell (44) and the other part is rotatably embedded in the shell (1). The first rotating component (45) rotatably connects the protruding end of the protective shell (44) and the shell (1).

7. The crack detector as described in claim 4, characterized in that, The roller assembly (3) includes: The hub (31) is fitted on one side of the damping box (41) and rotates synchronously with the damping box (41); The second rotating member (32) is partially disposed on the side of the hub (31) away from the damping box (41), and the other part is rotatably connected to the anti-rotation member (43). The second rotating member (32) rotatably connects the hub (31) and the anti-rotation member (43).

8. The crack detector as described in claim 7, characterized in that, The roller assembly (3) also includes: A flexible ring (33) is fitted onto the hub (31) and used to abut against the surface of the object being measured.

9. The crack detector as described in claim 1, characterized in that, The housing (1) includes: The cover (11) is hollow inside and forms a space for the detection body (2) and at least one damping element (4); A base plate (12) is placed over the opening of the cover (11) to seal the cover (11). At least one through hole (1201) is provided on the base plate (12). At least one roller assembly (3) and at least one damping element (4) are rotatably disposed on the base plate (12), and the roller assembly (3) passes through the through hole (1201) to contact the surface of the object being measured.

10. The crack detector as described in claim 9, characterized in that, The detection body (2) includes Circuit board (21) is horizontally mounted on the base plate (12); Several probes (22) are electrically connected to the circuit board (21) and are arranged in a rectangular array to form multiple detection areas.

Images