Portable knocking detector for pipeline weld crack

Abstract

The utility model relates to a detector, in particular to a portable knocking detector for pipeline weld cracks. Comprising a base, a fixing shaft, a bearing, a torsional spring, a knocking rod, an L-shaped rod, a connecting plate, a microphone, a lithium battery, an audio frequency spectrum analyzer and a driving mechanism, the fixing shaft, the lithium battery and the audio frequency spectrum analyzer are installed on the top of the base, and the bearing is rotationally arranged on the fixing shaft; the torsion spring is connected between the bearing and the fixing shaft, the knocking rod and the L-shaped rod are connected to the two ends of the bearing respectively, the connecting plate is connected to the base, and the microphone is installed on the connecting plate. According to the utility model, a mechanical knocking mode is adopted, the consistency of knocking force at each time is realized through the driving of the speed reducing motor, and the accuracy and repeatability of a detection result are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a detector, especially a pipeline weld crack portable knocking detector. BACKGROUND

[0002] In the pipeline welding process, the generation of welds is inevitable. As the key part connecting two or more pipelines, the sealing of welds is directly related to the safety and reliability of the entire pipeline system. Therefore, it is crucial to detect the sealing of welds after welding. A traditional and effective detection method is to knock the area around the weld, and judge whether the weld has defects or incomplete sealing according to the sound characteristics. This method relies on the physical characteristics of sound propagation, that is, the intact weld and the weld with defects will produce different sound spectrum characteristics when subjected to the same force.

[0003] However, the traditional weld sealing detection mainly relies on manual knocking, and the quality of the weld is judged by human auditory experience. This way not only is inefficient, but also due to the influence of human factors, the force of knocking is difficult to maintain uniform, resulting in a large deviation in the detection results. In addition, long-term manual operation is easy to cause the fatigue of workers, further increasing the risk of detection error. SUMMARY

[0004] In order to overcome the shortcomings of manual knocking, low efficiency, and due to the influence of human factors, the force of knocking is difficult to maintain uniform, resulting in a large deviation in the detection results, the utility model provides a pipeline weld crack portable knocking detector.

[0005] The technical scheme of the utility model is: a pipeline weld crack portable knocking detector, including base, fixed shaft, bearing, torsional spring, knocking rod, L type rod, connecting plate, microphone, lithium battery, audio frequency spectrum analyzer and drive mechanism, the fixed shaft is installed on the top of base, the lithium battery and the audio frequency spectrum analyzer, the bearing is rotatably arranged on the fixed shaft, the torsional spring is connected between the bearing and the fixed shaft, the bearing two ends are connected with the knocking rod and the L type rod respectively, the connecting plate is connected on the base, the microphone is installed on the connecting plate, the audio frequency spectrum analyzer is electrically connected with the microphone and the lithium battery respectively, the drive mechanism is installed on the base, and the drive mechanism is used for driving the L type rod to move.

[0006] As a preferred, the drive mechanism includes a reduction motor and a rotating block, the reduction motor is installed on the top of base, and the output shaft of the reduction motor is connected with the rotating block.

[0007] As preferred, a knocking head is further included, and the knocking rod is connected with the knocking head at an end away from the bearing.

[0008] As preferred, a connecting rod and a button are further included, the base side is connected with the connecting rod, the button is installed on the connecting rod, and the button is electrically connected with the lithium battery and the speed reducer motor respectively.

[0009] As preferred, an anti-skid sleeve is further included, and the connecting rod is sleeved with the anti-skid sleeve outside an end away from the base.

[0010] As preferred, an avoiding groove is arranged on the base and located directly below the L-shaped rod.

[0011] The utility model discloses the beneficial effect is: the utility model discloses the mechanical knock mode, realizes the consistency of each knock force through the speed reducer motor drive, improves the accuracy and repeatability of detection result. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0013] Figure 2 It is the three-dimensional structure schematic diagram of the utility model hidden connecting rod.

[0014] Figure 3 It is the three-dimensional structure schematic diagram of the utility model hidden connecting rod, lithium battery and drive mechanism.

[0015] Mark explanation: 1_base, 2_fixed shaft, 3_bearing, 4_torsional spring, 5_knocking rod, 6_L-shaped rod, 7_connecting plate, 8_microphone, 9_lithium battery, 10_audio frequency spectrum analyzer, 11_speed reducer motor, 12_rotation block, 13_knocking head, 14_connecting rod, 15_button, 16_anti-skid sleeve, 17_avoiding groove. DETAILED DESCRIPTION

[0016] The following description is only the preferred embodiment of the utility model, and does not limit the protection scope of the utility model.

[0017] A pipeline weld crack portable knock detector, such as Figures 1-3As shown, including the base 1, fixed shaft 2, bearing 3, torsional spring 4, knock bar 5, L-shaped rod 6, connecting plate 7, microphone 8, lithium battery 9, audio spectrum analyzer 10 and drive mechanism, the top of the base 1 is provided with the fixed shaft 2, the top of the base 1 is provided with the lithium battery 9, the top of the base is provided with the audio spectrum analyzer 10, the outer side of the fixed shaft 2 is connected with the inner ring of the bearing 3, the torsional spring 4 is connected between the outer ring of the bearing 3 and the fixed shaft 2, the front and rear ends of the outer ring of the bearing 3 are connected with the knock bar 5 and the L-shaped rod 6 respectively, the knock bar 5 is longer than the L-shaped rod 6, one end of the knock bar 5 away from the bearing 3 is connected with a knocking head 13, the knocking head 13 protrudes downward, the connecting plate 7 is connected to the left rear end of the base 1, the microphone 8 is installed on the connecting plate 7, the microphone 8 is arranged close to the knocking bar 5 to facilitate the collection of the sound emitted after knocking, the microphone 8 has a noise reduction function, the audio spectrum analyzer 10 is electrically connected with the microphone 8 and the lithium battery 9 respectively, the base 1 is provided with a drive mechanism, and the drive mechanism is used for driving the L-shaped rod 6 to move, the base 1 is provided with an avoiding slot 17, the avoiding slot 17 is located directly below the L-shaped rod 6, and the avoiding slot 17 is used for avoiding the L-shaped rod 6 when the L-shaped rod 6 moves, so as to avoid the L-shaped rod 6 being blocked.

[0018] As shown in Figure 2 The drive mechanism includes a reduction motor 11 and a rotating block 12, the reduction motor 11 is installed on the top of the base 1, the output shaft of the reduction motor 11 is connected with the rotating block 12, the L-shaped rod 6 is located on the rotating path of the rotating block 12, so that the rotating block 12 rotates to push the L-shaped rod 6 to swing downward.

[0019] As shown in Figure 1 It also includes a connecting rod 14, a button 15 and an anti-skid sleeve 16, the base 1 is connected with the connecting rod 14, the connecting rod 14 is provided with the button 15, the button 15 is electrically connected with the lithium battery 9 and the reduction motor 11 respectively, the button 15 is used for turning on or off the power supply of the reduction motor 11, the outer side of one end of the connecting rod 14 away from the base 1 is provided with the anti-skid sleeve 16, the anti-skid sleeve 16 is made of silica gel, and grooves are arranged at the bottom of the anti-skid sleeve 16.

[0020] When the pipeline weld is sealed and detected, the connecting rod 14 of the device is held, the anti-skid sleeve 16 can make people hold more comfortable, the knocking head 13 is aimed at the weld, the button 15 is pressed, the speed reducer motor 11 is powered on, the speed reducer motor 11 is started to drive the rotating block 12 to rotate a circle, the rotating block 12 rotates to extrude the L-shaped rod 6 to further include the shaft downward rotation, the bearing 3 and the knocking rod 5 rotate, the knocking head 13 is lifted up, and the torsional spring 4 is deformed to store force. When the rotating block 12 rotates to be separated from the L-shaped rod 6, the bearing 3, the L-shaped rod 6 and the knocking rod 5 are quickly reset under the action of the torsional spring 4, the weld is knocked by the knocking head 13, sound is emitted when knocking, the microphone 8 collects sound, the audio frequency spectrum analyzer 10 converts the sound signal into a digital signal, and the screen of the audio frequency spectrum analyzer 10 is displayed, so that the pipeline knocking detection is completed.

[0021] The above is only an embodiment of the present application and is not used to limit the present application. Any equivalent replacement within the principle of the present application should be included in the protection scope of the present application. The content not described in detail in the present application is the prior art known by the technical personnel in the field.

Claims

1. A portable knock detection instrument for pipeline weld cracks, characterized by: The utility model relates to a kind of audio frequency spectrum analyzers, including base (1), fixed shaft (2), bearing (3), torsion spring (4), knock stick (5), L-type rod (6), connecting plate (7), microphone (8), lithium battery (9), audio frequency spectrum analyzer (10) and drive mechanism, the base (1) top is equipped with the fixed shaft (2), the lithium battery (9) and the audio frequency spectrum analyzer (10), the fixed shaft (2) is rotationally equipped with the bearing (3), the torsion spring (4) is connected between the bearing (3) and the fixed shaft (2), the bearing (3) both ends are connected with the knock stick (5) and the L-type rod (6) respectively, the connecting plate (7) is connected on the base (1), the microphone (8) is installed on the connecting plate (7), the audio frequency spectrum analyzer (10) is electrically connected with the microphone (8) and the lithium battery (9) respectively, drive mechanism is installed on the base (1), and drive mechanism is used to drive the L-type rod (6) movement.

2. A portable knock detection apparatus for detecting a weld crack in a pipe according to claim 1, wherein: Drive mechanism includes reduction motor (11) and rotary block (12), the reduction motor (11) is installed on the base (1) top, and the output shaft of the reduction motor (11) is connected with the rotary block (12).

3. A portable knock detection apparatus for detecting a weld crack in a pipe according to claim 2, wherein: It also includes knock head (13), and the knock stick (5) is connected with knock head (13) at one end away from the bearing (3).

4. A portable knock detection apparatus for detecting a weld seam crack of a pipe according to claim 3, characterized in that: It also includes connecting rod (14) and button (15), the base (1) side is connected with the connecting rod (14), and the connecting rod (14) is installed with the button (15), and the button (15) is electrically connected with the lithium battery (9) and the reduction motor (11) respectively.

5. A portable knock detection apparatus for detecting a weld seam crack of a pipe according to claim 4, wherein: It also includes anti-skid sleeve (16), and the connecting rod (14) is sleeved with the anti-skid sleeve (16) outside one end away from the base (1).

6. A portable knock detection apparatus for detecting a weld seam crack of a pipe according to claim 5, characterized in that: The base (1) is provided with an avoiding slot (17), and the avoiding slot (17) is located directly below the L-type rod (6).

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