Crack nondestructive flaw detector

Abstract

The utility model discloses a lossless flaw detector for cracks, which comprises a rack, an adjusting mechanism is mounted in the rack, a mounting plate is fixed below the adjusting mechanism, an ultrasonic flaw detector is fixed in the middle of the bottom end of the mounting plate, sliding seats are symmetrically mounted on two sides of the mounting plate, and a linkage mechanism is connected below one group of sliding seats. And the linkage mechanism comprises a connecting rod fixed with the sliding seat. By arranging a linkage mechanism, when the height of the ultrasonic flaw detector is adjusted, a sliding block can be driven to descend through a connecting rod, then a supporting plate is driven to descend, a flattening roller at one end of a shaft frame makes contact with a detected workpiece in the descending process of the supporting plate, and at the moment, a flattening roller shaft frame is stressed to rotate along a spring shaft; and the flattening roller moves towards the other side of the ultrasonic flaw detector, and can uniformly smear the coupling agent on the surface of the workpiece in the moving process, so that the flaw detection is prevented from being influenced, and the flaw detection precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of flaw detectors, in particular to a crack non-destructive flaw detector. Background Technique

[0002] An ultrasonic flaw detector is a portable industrial non-destructive flaw detection instrument, which can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose various defects inside workpieces. It can be used in both laboratories and engineering sites. It is widely used in industries such as boilers, pressure vessels, aerospace, aviation, electric power, petroleum, chemical industry, offshore oil, pipelines, military industry, shipbuilding, automobiles, machinery manufacturing, metallurgy, metal processing, steel structures, railway transportation, nuclear power, and universities.

[0003] During the use of the existing ultrasonic flaw detector, the ultrasonic flaw detector needs to be transmitted into the object to be detected. Due to the rough metal surface, when the ultrasonic flaw detector emits from the probe and reaches the surface of the detected object, it will be reflected due to the incoherence of the interface, which will cause the loss of the detection wave signal and the inability to detect the defects inside the weld. To solve this problem, a medium called a coupling agent needs to be introduced between the detected object and the probe. However, the coating uniformity of the coupling agent is poor during the flaw detection process, which is likely to reduce the flaw detection effect. Content of the Utility Model

[0004] The main purpose of the utility model is to provide a crack non-destructive flaw detector.

[0005] The purpose of the utility model can be achieved by adopting the following technical solutions:

[0006] A crack non-destructive flaw detector includes a frame. An adjusting mechanism is installed inside the frame. An installation plate is fixed below the adjusting mechanism. The middle of the bottom end of the installation plate is fixed with an ultrasonic flaw detector. Slide seats are symmetrically installed on both sides of the installation plate. And a linkage mechanism is connected below one group of the slide seats. The linkage mechanism includes a connecting rod fixed to the slide seat. The bottom end of the connecting rod is fixed with a slider. A support plate is fixed on the outside of the slider. A spring shaft is fixed inside the support plate. And a shaft frame is installed on the outside of the spring shaft. One end of the shaft frame away from the spring shaft is rotatably connected with a leveling roller.

[0007] Preferably, the bottom end of the support plate is above the bottom end of the ultrasonic flaw detector, and the bottom end of the leveling roller is flush with the bottom end of the ultrasonic flaw detector after it rotates to the horizontal state.

[0008] Preferably, the adjusting mechanism includes an adjusting lead screw and a bearing, and the adjusting lead screw is threadedly connected to the frame.

[0009] Preferably, the adjusting lead screw is connected to the installation plate through the bearing.

[0010] Preferably, sliding grooves are formed on opposite side walls inside the frame, and the sliding seat is slidably connected to the sliding grooves.

[0011] Preferably, the slider has the same structure as the sliding seat, and the slider is slidably connected to the sliding groove.

[0012] Preferably, a base is fixed to the bottom end of the frame, and handles are symmetrically installed at the top end of the frame.

[0013] The beneficial technical effects are as follows:

[0014] By providing a linkage mechanism, when adjusting the height of the ultrasonic flaw detector, the slider can be driven to descend through the connecting rod, and then the support plate is driven to descend. During the descending process of the support plate, the flattening roller at one end of the shaft frame contacts the workpiece to be detected. At this time, the shaft frame of the flattening roller rotates along the spring shaft under force, and the flattening roller moves to the other side of the ultrasonic flaw detector. During the movement, the flattening roller can evenly apply the coupling agent on the surface of the workpiece, avoiding affecting flaw detection and ensuring the flaw detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of a preferred embodiment of a crack non-destructive flaw detector according to the present invention;

[0016] Figure 2 FIG. is a schematic connection diagram of a mounting plate, an ultrasonic flaw detector, a sliding seat, and a linkage mechanism in a preferred embodiment of a crack non-destructive flaw detector according to the present invention;

[0017] Figure 3 FIG. is a schematic positional relationship diagram of a shaft frame and a flattening roller in a horizontal state with an ultrasonic flaw detector in a preferred embodiment of a crack non-destructive flaw detector according to the present invention.

[0018] The reference numerals are explained as follows:

[0019] 1. Frame; 2. Adjusting mechanism; 201. Adjusting lead screw; 202. Bearing; 3. Mounting plate; 4. Ultrasonic flaw detector; 5. Sliding seat; 6. Linkage mechanism; 601. Connecting rod; 602. Slider; 603. Support plate; 604. Spring shaft; 605. Shaft frame; 606. Flattening roller; 7. Handle; 8. Sliding groove; 9. Base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the technical solutions of the present invention clearer and more definite for those skilled in the art, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. However, the embodiments of the present invention are not limited thereto.

[0021] As Figures 1 - 3As shown in the figure, a crack non-destructive detector provided in this embodiment includes a frame 1. An adjusting mechanism 2 is installed inside the frame 1. A mounting plate 3 is fixed below the adjusting mechanism 2. The mounting plate 3 can fix an ultrasonic detector 4. The middle of the bottom end of the mounting plate 3 is fixed with an ultrasonic detector 4, which can detect a workpiece. Slide seats 5 are symmetrically installed on both sides of the mounting plate 3. The slide seats 5 can ensure the stability of the mounting plate 3 during movement. And a linkage mechanism 6 is connected below one group of slide seats 5. The linkage mechanism 6 includes a connecting rod 601 fixed to the slide seat 5. The slide seat 5 drives the slider 602 to move synchronously through the connecting rod 601. The bottom end of the connecting rod 601 is fixed with a slider 602. The slider 602 can drive a support plate 603 to move. A support plate 603 is fixed outside the slider 602. The support plate 603 can support a spring shaft 604. A spring shaft 604 is fixed inside the support plate 603. The spring shaft 604 can support a shaft frame 605 and make the shaft frame 605 rebound and reset. And a shaft frame 605 is installed outside the spring shaft 604. The shaft frame 605 can support a leveling roller 606. One end of the shaft frame 605 away from the spring shaft 604 is rotatably connected with a leveling roller 606. The leveling roller 606 can level the coupling agent on the workpiece.

[0022] As Figures 1 - 3 shown, the bottom end of the support plate 603 is located above the bottom end of the ultrasonic detector 4, and the bottom end of the leveling roller 606 is flush with the bottom end of the ultrasonic detector 4 after rotating to the horizontal state, so as to avoid the influence of the support plate 603 and the leveling roller 606 during the detection process.

[0023] As Figure 1 shown, the adjusting mechanism 2 includes an adjusting lead screw 201 and a bearing 202, and the adjusting lead screw 201 is in threaded connection with the frame 1, which is convenient for the adjusting lead screw 201 to rotate along the frame 1.

[0024] As Figure 1 shown, the adjusting lead screw 201 is connected to the mounting plate 3 through the bearing 202, which is convenient for the adjusting lead screw 201 to drive the mounting plate 3 to rise and fall through the bearing 202 during rotation.

[0025] As Figure 1 shown, sliding grooves 8 are respectively opened on the opposite side walls inside the frame 1, and the slide seats 5 are slidably connected with the sliding grooves 8, so that the slide seats 5 can move along the sliding grooves 8 to guide them during the lifting and lowering process of the mounting plate 3.

[0026] As Figures 1 - 2 shown, the slider 602 has the same structure as the slide seat 5, and the slider 602 is slidably connected with the sliding groove 8, which is convenient for guiding the slider 602 through the sliding groove 8.

[0027] As Figures 1 - 2 shown, a base 9 is fixed to the bottom end of the frame 1, and handles 7 are symmetrically installed at the top end of the frame 1, which can support the frame 1 through the base 9.

[0028] Working principle of this device: When this device is in specific use, the base 9 supports the frame 1. Then, the worker places the workpiece under the ultrasonic flaw detector 4 and applies a coupling agent at the flaw detection position. The worker rotates the adjusting lead screw 201 in the adjusting mechanism 2 according to the height of the workpiece. During the rotation of the adjusting lead screw 201 along the frame 1, the mounting plate 3 can be driven to descend through the bearing 202, thereby driving the ultrasonic flaw detector 4 to descend to the top of the workpiece. During the descent of the mounting plate 3, the slide block 5 moves along the chute 8, which can drive the slider 602 in the linkage mechanism 6 to move synchronously, and then drive the support plate 603 to descend. During the descent of the support plate 603, the leveling roller 606 at one end of the shaft frame 605 contacts the workpiece to be measured. At this time, the shaft frame 605 of the leveling roller 606 rotates along the spring shaft 604 under force, and the leveling roller 606 moves to the other side of the ultrasonic flaw detector 4. During the movement, the leveling roller 606 can evenly apply the coupling agent on the surface of the workpiece, avoiding affecting flaw detection and ensuring the flaw detection accuracy.

[0029] The above is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the scope disclosed by the present utility model, according to the technical solution and its concept of the present utility model, makes equivalent substitutions or changes, all belong to the protection scope of the present utility model.

Claims

1. A nondestructive crack detector, characterized in that: The invention comprises a frame (1), wherein an adjusting mechanism (2) is installed in the frame (1), a mounting plate (3) is fixed below the adjusting mechanism (2), an ultrasonic flaw detector (4) is fixed at the middle of the bottom end of the mounting plate (3), slide seats (5) are symmetrically installed on both sides of the mounting plate (3), and a linkage mechanism (6) is connected below one group of the slide seats (5), wherein the linkage mechanism (6) comprises a connecting rod (601) fixed to the slide seat (5), a sliding block (602) is fixed at the bottom end of the connecting rod (601), a supporting plate (603) is fixed on the outside of the sliding block (602), a spring shaft (604) is fixed inside the supporting plate (603), and an axis frame (605) is installed on the outside of the spring shaft (604), and a flattening roller (606) is rotatably connected to the end of the axis frame (605) away from the spring shaft (604).

2. A nondestructive crack detector according to claim 1, characterized in that: The bottom end of the support plate (603) is located above the bottom end of the ultrasonic flaw detector (4), and after the flattening roller (606) rotates to a horizontal state, its bottom end is flush with the bottom end of the ultrasonic flaw detector (4).

3. A nondestructive crack detector according to claim 2, characterized in that: The adjusting mechanism (2) comprises an adjusting screw (201) and a bearing (202), and the adjusting screw (201) is threadedly connected to the frame (1).

4. A nondestructive crack detector according to claim 3, characterized in that: The adjusting screw (201) is connected to the mounting plate (3) via the bearing (202).

5. A nondestructive crack detector according to claim 4, characterized in that: Slide grooves (8) are provided on opposite side walls of the frame (1), and the slide seat (5) is slidably connected to the slide grooves (8).

6. A nondestructive crack detector according to claim 5, characterized in that: The sliding block (602) has the same structure as the sliding seat (5), and the sliding block (602) is slidably connected to the sliding groove (8).

7. A nondestructive crack detector according to claim 6, characterized in that: A base (9) is fixed at the bottom end of the frame (1), and a handle (7) is symmetrically mounted at the top end of the frame (1).

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