Acoustic emission detection device

Abstract

The utility model discloses an acoustic emission detection device which comprises an acoustic emission sensor connected with an external computer through a transmitter, a sliding seat is arranged outside the acoustic emission sensor, a headstock is sleeved on the sliding seat, a connecting rod is arranged at one end of the sliding seat, and a transmission line of the acoustic emission sensor penetrates through the connecting rod; an elastic pushing and pressing mechanism is arranged on the sliding seat and the connecting rod; a smearing hole groove is formed in one side of the headstock and used for smearing a coupling agent on the surface of an object when the headstock moves along the surface of the object; and the smearing hole groove is communicated with a coupling agent supply mechanism. Coupling agent brushing and acoustic emission detection functions can be combined on one gun-type designed device, so that the device is convenient to carry and is convenient to use at a high place of mechanical equipment for detection operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of acoustic emission detection equipment, and specifically relates to an acoustic emission detection device. Background Art

[0002] Acoustic emission detection instruments are widely used in the status monitoring of various large-scale industrial mechanical structures, bridges, and petrochemical pressure storage vessels; they are also used in the fault diagnosis of various industrial equipment, blade damage and gear damage detection of wind power generation, etc.; they are also used in mining and underground geotechnical engineering detection, such as the detection of brittle rock materials.

[0003] Acoustic emission sensors are mainly used for status detection of large mechanical structures. Their transmission lines are connected to external computers through transmitters. Acoustic emission sensors are generally composed of a housing, a protective film, a piezoelectric element, a damping block, a connecting wire and a high-frequency socket. Piezoelectric elements are usually made of lead zirconate titanate, barium titanate and lithium niobate.

[0004] The utility model patent with authorization announcement number: CN208432577U discloses an acoustic emission detection device, involving a piezoelectric ceramic sheet and a multi-layer circuit board damping block; the multi-layer circuit board damping block includes: a multi-layer circuit board; the multi-layer circuit boards are arranged along the same vertical line, and the area of ​​each circuit board in the multi-layer circuit board is equal to the area of ​​the piezoelectric ceramic sheet; a damping block is provided between any two adjacent circuit boards; the multi-layer circuit boards are mixed and fixed together by the damping block to form a multi-layer circuit board damping block.

[0005] In reality, there are many small resonant acoustic emission sensor products, which are packaged and fixed by a handheld handle for easy handheld use. When testing, it is necessary to first apply a coupling agent on the surface of the device to be tested to ensure that the image is clearer after being transmitted to the computer and further analyzed by the computer; secondly, the viscous coupling agent has good lubricity and can protect the contact surface of the piezoelectric ceramic acoustic emission sensor.

[0006] However, in actual use, it is inevitable to climb to a high place to perform flaw detection on the surface of the higher area of ​​the mechanical equipment. At this time, according to actual needs, the transmission line of the acoustic emission detection sensor can be customized to be longer to meet the connection with the laptop computer and the use of viewing images. However, for those who use the acoustic emission detection sensor in contact with objects, they not only need to carry this kind of acoustic emission detector, but also need to carry coupling agent and brushing tools, which is not convenient to use. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide an acoustic emission detection device which is convenient to carry to a high place for detection.

[0008] To achieve the above object, the utility model provides the following technical solutions: an acoustic emission detection device, comprising an acoustic emission sensor connected to an external computer through a transmitter, a sliding seat is arranged outside the acoustic emission sensor, a head seat is sleeved on the sliding seat, a connecting rod is arranged at one end of the sliding seat, and a transmission line of the acoustic emission sensor passes through the connecting rod;

[0009] The sliding seat and the connecting rod are provided with an elastic pushing mechanism, which is used to elastically support the sliding seat so that the contact surface of the acoustic emission sensor does not contact the object to be measured, and can push the contact surface of the acoustic emission sensor to contact the object to be measured when the contact surface of the acoustic emission sensor needs to contact the object to be measured;

[0010] A coating hole groove is provided in one side of the head seat, and the coating hole groove is used to coat the coupling agent on the surface of the object when the head seat moves along the surface of the object; the coating hole groove is connected to a coupling agent supply mechanism, and the coupling agent supply mechanism is used to load the coupling agent and inject the coupling agent into the coating hole groove.

[0011] In order to prevent the contact surface of the acoustic emission sensor from contacting the object to be measured and to ensure that the contact surface of the acoustic emission sensor contacts the object to be measured when required, preferably, the elastic pushing mechanism includes an active cavity arranged on one side of the head seat, a slip ring is arranged on the outer side of the sliding seat and the slip ring is slidably arranged in the active cavity, a spring is also arranged in the active cavity and the two ends of the spring are elastically supported on one side of the active cavity and the slip ring respectively, sliding blocks are arranged on the upper and lower parts of the slip ring, sliding grooves are arranged on the upper and lower sides of the inner wall of the active cavity and the sliding block is slidably arranged in the sliding groove.

[0012] In order to facilitate the hand-held pushing of the sliding seat and the acoustic emission sensor to move laterally in the head seat, preferably, the elastic pushing mechanism also includes a handle arranged on one side of the connecting rod, and the handle is used to hand-hold the sliding seat and the acoustic emission sensor.

[0013] In order to enable the coupling agent to effectively occupy the opening of the extrusion port and be discharged, preferably, the application hole groove includes an extrusion cavity arranged in one side of the head seat, one side of the extrusion cavity has an extrusion port, and the extrusion cavity is connected to the outside through the extrusion port.

[0014] In order to effectively supply the coupling agent into the smear hole groove, preferably, the coupling agent supply mechanism includes a discharge pipe connected to the smear hole groove, the discharge pipe is connected to a suction pump through a tee, the suction end of the suction pump is connected to the access pipe through a solenoid valve, one end of the access pipe is connected to a joint, a soft ring is arranged in the joint, a bottle is screwed on the joint, and the port of the bottle is pressed against the soft ring.

[0015] In order to enable the suction tube to effectively suck away the coupling agent from the bottle, preferably, a suction tube is provided on the joint, and through holes are evenly arranged on the suction tube.

[0016] In order to achieve connection and support for the access pipe and its upper connecting member, preferably, a support rod is connected to the connecting rod, a support ring is connected to the top of the support rod, and the support ring is sleeved on the access pipe.

[0017] In order to isolate the end of the head seat from the external environment when not in use, preferably, a cover plate is connected to the end of the head seat.

[0018] In order to facilitate the control of the suction pump and the solenoid valve, preferably, a switch is provided on the handle.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the utility model, the functions of applying coupling agent and acoustic emission detection can be combined in a device of gun-type design, which is convenient to carry and easy to use for detection operations at high places of mechanical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a main schematic diagram of the utility model;

[0022] Figure 2 for Figure 1 A partial cutaway diagram of

[0023] Figure 3 for Figure 1 Schematic diagram of the cross section cut at AA;

[0024] Figure 4 This is a left side schematic diagram of the acoustic emission detection device of the utility model when the cover is not opened;

[0025] Figure 5 It is a left side schematic diagram of the acoustic emission detection device of the utility model when the cover is opened.

[0026] In the figure: 1 head seat, 2 sliding seat, 3 acoustic emission sensor, 4 connecting rod, 5 slip ring, 6 movable cavity, 7 spring, 8 slider, 9 slide groove, 10 handle, 11 cover plate, 12 extrusion cavity, 13 extrusion port, 14 discharge pipe, 15 tee, 16 suction pump, 17 solenoid valve, 18 access pipe, 19 joint, 20 soft ring, 21 bottling, 22 suction pipe, 23 support rod, 24 support ring, 25 switch. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the embodiment of the utility model provides an acoustic emission detection device, including an acoustic emission sensor 3 connected to an RS485 current transmitter connector through a transmission line and connected to an external computer through the RS485 current transmitter connector. The acoustic emission sensor 3 adopts a resonant acoustic emission sensor. The resonant acoustic emission sensor is selected as Fuji AE304S, with a specification of The acoustic emission sensor 3 is embedded with a sliding seat 2 on its exterior, the contact surface of the acoustic emission sensor 3 is flush with the left end of the sliding seat 2, a head seat 1 is provided on the sliding seat 2, a connecting rod 4 is integrally provided on the right end of the sliding seat 2, and the transmission line of the acoustic emission sensor 3 passes through the connecting rod 4;

[0029] An elastic pushing mechanism is provided on the sliding seat 2 and the connecting rod 4, and the elastic pushing mechanism is used to elastically support the sliding seat 2 so that the contact surface of the acoustic emission sensor 3 does not contact the object to be measured, and when the contact surface of the acoustic emission sensor 3 needs to contact the object to be measured, the elastic pushing mechanism can push the contact surface of the acoustic emission sensor 3 to contact the object to be measured;

[0030] By setting the elastic pushing mechanism, the sliding seat 2 can be elastically supported at a position 3 cm away from the left end of the head seat 1, so when the coupling agent is applied, the acoustic emission sensor 3 does not need to contact the surface to be detected.

[0031] An application hole groove is provided in the upper left part of the head seat 1, and the application hole groove is used to apply the coupling agent on the surface of the object when the head seat 1 moves along the surface of the object; the application hole groove is connected to a coupling agent supply mechanism, and the coupling agent supply mechanism is used to load the coupling agent and inject the coupling agent into the application hole groove.

[0032] See also Figure 1 , Figure 2 and Figure 3 The elastic pushing mechanism includes an active cavity 6 arranged on the right side of the head seat 1. The active cavity 6 is a circular cavity. The right side of the active cavity 6 is closed by a screw-fixed ring cover. A slip ring 5 is integrally arranged on the outer side of the sliding seat 2 and the slip ring 5 is slidably arranged in the active cavity 6. A spring 7 is also arranged in the active cavity 6 and the two ends of the spring 7 are elastically supported on one side of the active cavity 6 and the slip ring 5 respectively. The spring 7 is a compression-rebound type. The initial compression-rebound force of the spring 7 is 20 Newtons. In the natural state, the slip ring 5 can be pushed against the contact ring cover. The upper and lower parts of the slip ring 5 are integrally arranged with a slider 8. The upper and lower sides of the inner wall of the active cavity 6 are provided with a slide groove 9 and the slider 8 is slidably arranged in the slide groove 9. Through the sliding cooperation between the slider 8 and the slide groove 9, the sliding seat 2 cannot rotate when it moves left and right in the head seat 1.

[0033] See also Figure 1 , Figure 2 , Figure 4 and Figure 5The elastic pushing mechanism also includes a handle 10 fixed by screws at the lower right side of the connecting rod 4, and the handle 10 is used to hand-hold and push the sliding seat 2 and the acoustic emission sensor 3.

[0034] During use, hold the handle 10 and touch the left end of the head seat 1 to the surface of the object to be detected. When the acoustic emission sensor 3 needs to be used to contact the surface of the object, push the handle 10 and the spring 7 is compressed until the contact surface of the acoustic emission sensor 3 contacts the surface of the object. When the pressure on the handle 10 is stopped, the acoustic emission sensor 3 retracts into the head seat 1 due to the rebound of the spring 7.

[0035] See also Figure 2 and Figure 4 The smear hole groove includes an extrusion cavity 12 arranged in the upper left part of the head seat 1. The extrusion cavity 12 is a cylindrical cavity. The left side of the extrusion cavity 12 is an extrusion port 13. The left end opening width of the extrusion port 13 is 0.1 mm. The extrusion cavity 12 is connected to the outside through the extrusion port 13.

[0036] When the coupling agent is supplied into the extrusion cavity 12 , it is difficult to quickly discharge the coupling agent in the extrusion cavity 12 through the extrusion port 13 . Therefore, as the coupling agent is continuously supplied, the extrusion cavity 12 is filled with the coupling agent, and finally the coupling agent can be uniformly discharged from various positions of the left end opening of the extrusion port 13 .

[0037] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The coupling agent supply mechanism includes a discharge pipe 14 connected to the coating hole groove. The discharge pipe 14 is connected to a suction pump 16 through a tee. The suction pump 16 is a 5V micro ceramic membrane pump. The power access end of the suction pump 16 is connected to the terminal on one side of the switch 25 by a cable. The suction end of the suction pump 16 is connected to the access pipe 18 through an electromagnetic valve 17. The terminal of the electromagnetic valve 17 is connected to the terminal on one side of the switch 25 through a cable. A joint 19 is integrally provided at the upper right end of the access pipe 18. A soft ring 20 is installed in the joint 19. The material of the soft ring 20 is chloroprene rubber. A bottle 21 is screwed on the joint 19. The port of the bottle 21 is pressed against the soft ring 20, which ensures the sealing of the bottle 21 and the joint 19, and prevents the coupling agent from being discharged from the screw connection between the two.

[0038] Therefore, when the electromagnetic valve 17 is opened and the suction pump 16 is running, the coupling agent can be sucked from the bottle 21, then discharged into the extrusion cavity 12, and then discharged through the extrusion port 13. When the electromagnetic valve 17 is closed, the suction pump 16 stops running.

[0039] See also Figure 2A suction pipe 22 is integrally provided on the joint 19, the center hole of the joint 19 is connected to the suction pipe 22, and through holes are evenly provided on the suction pipe 22. In addition, after the bottle 21 is tightened on the joint 19, the left area is closer to the suction pipe 22. Therefore, regardless of vertical detection or horizontal detection, the coupling agent can be concentrated in the suction pipe 22 area, and the coupling agent can be better absorbed from the bottle 21.

[0040] See also Figure 1 and Figure 2 A support rod 23 is screwed on the connecting rod 4, a support ring 24 is screwed on the top of the support rod 23, and the support ring 24 is slidably sleeved on the access pipe 18.

[0041] With such an arrangement, not only can the access tube 18 be effectively supported, but also the support ring 24 can slide on the access tube 18 when the handle 10 is pushed to move the sliding seat 2 .

[0042] See also Figure 1 , Figure 2 and Figure 4 The end of the head seat 1 is wrapped with a cover plate 11, and the cover plate 11 is made of rubber, which can prevent the opening of the extrusion port 13 and the acoustic emission sensor 3 from contacting the external environment when not in use.

[0043] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 A switch 25 is screwed on the handle 10, and the switch 25 is a bridge type switch. The other terminal of the switch 25 is connected to the power access terminal of the battery through a cable. The battery is a 5V battery, and the battery is fixed to the side of the handle 10 with tape.

[0044] Therefore, by operating the switch 25, the power supply of the suction pump 16 and the electromagnetic valve 17 is turned on and off. When the suction pump 16 is powered on, the suction operation begins; and when the electromagnetic valve 17 is powered on, the electromagnetic valve 17 opens.

[0045] The working principle of this embodiment is as follows:

[0046] Elastic pushing mechanism: When the handheld handle 10 is used, the sliding seat 2 can be elastically supported at a position 3 cm away from the left end of the head seat 1 under the action of the elastic pushing mechanism. Therefore, when the coupling agent is applied, the acoustic emission sensor 3 may not contact the surface to be detected. When the acoustic emission sensor 3 needs to contact the surface to be detected, it is only necessary to push the handle 10 toward the head seat 1 until the contact surface of the acoustic emission sensor 3 contacts the surface to be detected.

[0047] Elastic pushing mechanism and coupling agent supply mechanism: When the handheld handle 10 is used, under the action of the elastic pushing mechanism, the sliding seat 2 can be elastically supported at a position 3 cm away from the left end of the head seat 1, the switch 25 can be turned on, the suction pump 16 starts to suck, the solenoid valve 17 opens, and the coupling agent can be sucked from the bottle 21, and then discharged into the extrusion cavity 12, and then discharged through the extrusion port 13. In the process of moving along the surface of the object, the coupling agent can be effectively applied to the surface of the object, and then the switch 25 is turned off, the suction pump 16 stops the suction operation, and the solenoid valve 17 closes.

[0048] Therefore, this type of acoustic emission detection device can combine the coupling agent application and acoustic emission detection functions in a gun-type device, which is convenient to carry and easy to use for detection operations at high places of mechanical equipment.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. An acoustic emission detection device, comprising an acoustic emission sensor (3) connected to an external computer via a transmitter, characterized in that: A sliding seat (2) is arranged outside the acoustic emission sensor (3), a head seat (1) is sleeved on the sliding seat (2), a connecting rod (4) is arranged at one end of the sliding seat (2), and a transmission line of the acoustic emission sensor (3) passes through the connecting rod (4); The sliding seat (2) and the connecting rod (4) are provided with an elastic pushing mechanism, which is used to elastically support the sliding seat (2) so that the contact surface of the acoustic emission sensor (3) does not contact the object to be measured, and when the contact surface of the acoustic emission sensor (3) needs to contact the object to be measured, the elastic pushing mechanism can push the contact surface of the acoustic emission sensor (3) to contact the object to be measured; A coating hole groove is provided in one side of the head seat (1), and the coating hole groove is used to coat the coupling agent on the surface of the object when the head seat (1) moves along the surface of the object; a coupling agent supply mechanism is provided in communication with the coating hole groove, and the coupling agent supply mechanism is used to load the coupling agent and inject the coupling agent into the coating hole groove.

2. An acoustic emission detection device according to claim 1, characterized in that: The elastic pushing mechanism comprises an active cavity (6) arranged on one side of the head seat (1); a slip ring (5) is arranged on the outer side of the sliding seat (2) and the slip ring (5) is slidably arranged in the active cavity (6); a spring (7) is also arranged in the active cavity (6) and the two ends of the spring (7) are elastically supported on one side of the active cavity (6) and on the slip ring (5) respectively; a slider (8) is arranged on the upper and lower parts of the slip ring (5); and a slide groove (9) is arranged on the upper and lower sides of the inner wall of the active cavity (6) and the slider (8) is slidably arranged in the slide groove (9).

3. An acoustic emission detection device according to claim 1 or 2, characterized in that: The elastic pushing mechanism also includes a handle (10) arranged on one side of the connecting rod (4), and the handle (10) is used for hand-holding and pushing the sliding seat (2) and the acoustic emission sensor (3).

4. An acoustic emission detection device according to claim 1, characterized in that: The application hole groove comprises an extrusion cavity (12) arranged in one side of the head seat (1), an extrusion port (13) on one side of the extrusion cavity (12), and the extrusion cavity (12) is connected to the outside through the extrusion port (13).

5. An acoustic emission detection device according to claim 1 or 4, characterized in that: The coupling agent supply mechanism comprises a discharge pipe (14) connected to the coating hole groove; the discharge pipe (14) is connected to a suction pump (16) through a tee; the suction end of the suction pump (16) is connected to an access pipe (18) through an electromagnetic valve (17); one end of the access pipe (18) is connected to a joint (19); a soft ring (20) is arranged in the joint (19); a bottle (21) is screwed on the joint (19); and a port of the bottle (21) is pressed tightly on the soft ring (20).

6. An acoustic emission detection device according to claim 5, characterized in that: The joint (19) is provided with a suction pipe (22), and the suction pipe (22) is evenly provided with through holes.

7. An acoustic emission detection device according to claim 5, characterized in that: The connecting rod (4) is connected to a support rod (23), the top of the support rod (23) is connected to a support ring (24), and the support ring (24) is sleeved on the access pipe (18).

8. An acoustic emission detection device according to claim 1, 2 or 4, characterized in that: The end of the head seat (1) is connected to a cover plate (11).

9. An acoustic emission detection device according to claim 3, characterized in that: The handle (10) is provided with a switch (25).

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