CN115541716B

CN115541716B - Ultrasonic detection device

Info

Publication number: CN115541716B
Application number: CN202211545499.5A
Authority: CN
Inventors: 叶伯颖; 李志彬; 潘宇祺; 陆凯烨; 马金超; 覃健雄; 黄臣萍; 刘国礼; 袁国泰
Original assignee: Guangdong Lisheng Electric Power Technology Co ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Current assignee: Guangdong Lisheng Electric Power Technology Co ltd; Foshan Power Supply Bureau of Guangdong Power Grid Corp
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-10
Anticipated expiration: 2042-12-05
Also published as: CN115541716A

Abstract

The application discloses ultrasonic detection device relates to porcelain insulator and detects technical field, including insulator spindle, ultrasonic flaw detector, surrounding mechanism, elevating system, actuating mechanism and the switching mechanism that has well cavity. The lifting mechanism comprises a lifting rod with an internal thread cavity, a first screw rod and a first driven gear; the surrounding mechanism comprises a mechanism body, a shaft rod and a second driven gear; the mechanism body is connected with an ultrasonic flaw detector; the switching mechanism is arranged in the insulating rod, is connected with the driving mechanism and is used for driving the driving mechanism to switch between a first transmission position and a second transmission position; when the driving mechanism moves to the first transmission position, the driving mechanism is in transmission connection with the first driven gear; when the driving mechanism moves to the second transmission position, the driving mechanism is in transmission connection with the second driven gear. This design can detect the determinand comprehensively high-efficiently, improves detection efficiency, and overall structure is compacter moreover, low in manufacturing cost.

Description

Ultrasonic detection device

Technical Field

The application relates to the technical field of porcelain insulator detection, in particular to an ultrasonic detection device.

Background

The porcelain insulator occasionally breaks down, and once the porcelain insulator breaks down, the stability of the power grid is seriously influenced, so that the porcelain insulator needs to be detected at regular time. The ultrasonic flaw detector is one of the existing live-line detection means, but the existing ultrasonic detection means has a limited detection range, is difficult to detect the porcelain insulator comprehensively and has low detection efficiency.

Disclosure of Invention

In view of the above, the present application is directed to an ultrasonic testing apparatus to solve the above-mentioned problems.

In order to achieve the above technical object, the present application provides an ultrasonic detection apparatus, including: the ultrasonic flaw detector comprises an insulating rod with a hollow cavity, an ultrasonic flaw detector, a surrounding mechanism, a lifting mechanism, a driving mechanism and a switching mechanism;

the lifting mechanism is arranged in the insulating rod and comprises a lifting rod with an internal thread cavity, a first screw and a first driven gear;

the lifting rod is inserted into the insulating rod and is in sliding fit with the insulating rod along the axial direction of the insulating rod;

the first screw rod is pivoted and fixed in the insulating rod, and one end of the first screw rod is in threaded connection with the inner threaded cavity of the lifting rod;

the first driven gear is fixedly sleeved at the other end of the first screw rod;

the surrounding mechanism comprises a mechanism body, a shaft rod and a second driven gear;

the mechanism body is arranged on one end, extending out of the insulating rod, of the lifting rod and is connected with the ultrasonic flaw detector;

the second driven gear is pivoted and fixed in the insulating rod;

the shaft lever is inserted into the insulating rod, one end of the shaft lever is connected with the mechanism body, and the other end of the shaft lever movably penetrates through the second driven gear and is in synchronous rotating fit with the second driven gear;

the switching mechanism is arranged in the insulating rod, is connected with the driving mechanism and is used for driving the driving mechanism to switch between a first transmission position and a second transmission position;

when the driving mechanism moves to a first transmission position, the driving mechanism is in transmission connection with the first driven gear;

when the driving mechanism moves to the second transmission position, the driving mechanism is in transmission connection with the second driven gear.

Further, the mechanism body comprises an arc-shaped base;

an arc-shaped track is arranged at the top of the arc-shaped base;

two ends of the arc-shaped track penetrate through two ends of the arc-shaped base;

an arc-shaped plate is arranged on the arc-shaped track in a sliding manner;

one side edge of the arc-shaped plate is in sliding contact with one side edge of the arc-shaped track;

a gear ring part is arranged on the other side edge of the arc-shaped plate, and an arc-shaped clearance groove is formed between the gear ring part and the other side edge of the arc-shaped rail;

connecting shafts are respectively fixed on the middle position and the position close to the end part of the arc-shaped clearance groove in a pivoted mode;

third driven gears which are fixedly meshed with the gear ring part are sleeved on shaft sections of the connecting shafts, which extend into the arc-shaped clearance grooves, in a one-to-one corresponding manner;

the connecting shaft extends out of the shaft section of the arc-shaped clearance groove downwards, and fourth driven gears are sleeved on the shaft section of the arc-shaped clearance groove in a one-to-one corresponding mode;

the three fourth driven gears are in transmission connection through a flexible part;

one end of the shaft lever is synchronously and rotatably connected with the connecting shaft positioned in the middle;

when the arc-shaped plate circularly moves on the arc-shaped track, the gear ring part is meshed with at least one third driven gear;

the ultrasonic flaw detector is arranged on the arc-shaped plate.

Further, an arc-shaped groove is formed in the bottom of the arc-shaped plate;

the arc-shaped groove is used for accommodating the flexible piece and the three fourth driven gears.

Further, the fourth driven gear is a belt gear;

the flexible member is a synchronous belt.

Furthermore, a sealing cover is detachably mounted on the arc-shaped groove;

one end of the connecting shaft positioned in the middle position extends downwards to form the sealing cover.

Furthermore, a connecting block is fixed at the middle position of the outer arc edge of the arc-shaped base;

the connecting block with the lifter top can be dismantled and be connected.

Further, the drive mechanism includes a first rotating electric machine;

the switching mechanism is connected with the first rotating motor;

an output shaft of the first rotating motor is connected with an extension rod;

the extension rod is fixedly sleeved with a first driving gear and a second driving gear;

when the first rotating electric machine moves to a first transmission position, the first driving gear is meshed with the first driven gear;

when the first rotating electric machine moves to a second transmission position, the second driving gear is meshed with the second driven gear.

Further, the switching mechanism comprises a slide block, a second rotating motor and a second screw rod;

the sliding block is arranged in the insulating rod in a sliding mode along the axial direction of the insulating rod;

the first rotating motor is arranged on the sliding block;

the sliding block is provided with a threaded through hole for the second screw to movably penetrate through and to be in threaded fit with the second screw;

the second rotating motor is installed in the insulating rod, and an output shaft of the second rotating motor is connected with one end of the second screw rod in a synchronous rotating mode.

Furthermore, a hanging rack is fixed on the insulating rod;

and a cross arm clamping groove is formed in the hanging rack.

Further, the bottom of the insulating rod is provided with a threaded connecting groove.

According to the technical scheme, the ultrasonic detection device designed by the application can realize surrounding and lifting detection, and further can comprehensively and efficiently detect the object to be detected, so that the detection efficiency is improved. Moreover, this application drives actuating mechanism through switching mechanism and switches between first transmission position and second transmission position, realizes that one set of actuating mechanism switching control encircles mechanism and elevating system to can install actuating mechanism and switching mechanism inside the insulator spindle together, both make overall structure compacter, help reducing manufacturing cost, can form better protection to actuating mechanism again, avoided the outer problem of leaking and fragile of automatically controlled module.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a cross-sectional view of an ultrasonic testing device provided herein;

FIG. 2 is a top view of a surround mechanism of an ultrasonic inspection device provided herein in a first operational state;

FIG. 3 is a top view of a surround mechanism of an ultrasonic inspection device provided herein in a second operational state;

FIG. 4 is a bottom view of a wrap-around mechanism of an ultrasonic testing device provided herein;

FIG. 5 is a cross-sectional view of a wrap-around mechanism of an ultrasonic testing device provided herein;

FIG. 6 is a partial cross-sectional view of an extension rod of an ultrasonic testing device provided herein;

in the figure: 100. an insulating rod; 200. a surrounding mechanism; 300. an ultrasonic flaw detector; 400. a lifting mechanism; 500. a drive mechanism; 600. a switching mechanism; 1. connecting grooves by screw threads; 2. a hanger; 21. a cross arm slot; 3. a mechanism body; 31. an arc-shaped base; 311. an arc-shaped track; 312. an arc-shaped groove; 32. an arc-shaped plate; 321. a rim portion; 33. a third driven gear; 34. a fourth driven gear; 35. a flexible member; 36. a connecting shaft; 37. connecting blocks; 38. a sealing cover; 41. a shaft lever; 42. a second driven gear; 51. a lifting rod; 52. a first screw; 53. a first driven gear; 61. a first drive gear; 62. a second driving gear; 63. an extension rod; 631. a first rod body; 6311. an inner groove; 632. a second rod body; 6321. an annular flange; 633. a connecting sleeve; 634. an elastic block; 64. a first rotating electrical machine; 71. a slider; 72. a second screw; 73. a second rotating electrical machine.

Detailed Description

The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the protection scope of the embodiments in the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application discloses ultrasonic detection device.

Referring to fig. 1 and fig. 2, an embodiment of an ultrasonic testing apparatus provided in an embodiment of the present application includes:

an insulating rod 100 with a hollow cavity, an ultrasonic flaw detector 300, a surrounding mechanism 200, a lifting mechanism 400, a driving mechanism 500 and a switching mechanism 600. The specific structure of the insulating rod 100 may be a hollow rod, an upper end cap detachably mounted on the top of the hollow rod, and a lower end cap detachably mounted on the bottom of the hollow rod, so that the design is more convenient for the installation and arrangement of the inner space, and of course, other structural designs may be used, without limitation.

Elevating system 400 installs in insulator spindle 100, including lifter 51, first screw 52 and the first driven gear 53 that has the internal thread chamber, lifter 51 inserts and locates in insulator spindle 100, and along the axial direction and the insulator spindle 100 sliding fit of insulator spindle 100, this lifter 51 self does not rotate, only realizes axial direction's elevating movement, and concrete sliding fit can be: a rectangular hole is formed in the insulating rod 100, and the cross section of the lifting rod 51 is designed to be a rectangular interface matched with the rectangular hole, so that the sliding fit condition is met but the rotation is limited, which can also be: the outer circumferential surface of the lifting rod 51 is provided with a guide rail bar, and the insulating rod 100 is provided with a guide rail groove slidably engaged with the guide rail bar, which is not limited in particular.

The first screw 52 is pivotally fixed in the insulating rod 100, and one end of the first screw extends into the internal threaded cavity of the lifting rod 51 and is in threaded connection with the internal threaded cavity of the lifting rod 51, and the first driven gear 53 is fixedly sleeved on the other end of the first screw 52. As for the pivot fixing arrangement of the first screw 52, a fixing block may be arranged inside the insulating rod 100, an axial bearing is fixed on the fixing block, and the first screw 52 passes through the axial bearing and is fixedly connected with the axial bearing, so that the pivot fixing can be realized.

The winding mechanism 200 includes a mechanism body 3, a shaft 41, and a second driven gear 42.

The mechanism body 3 is mounted on one end of the lifting rod 51 extending out of the insulating rod 100, and is connected with the ultrasonic flaw detector 300, and the ultrasonic flaw detector 300 can be used by using an existing ultrasonic flaw detector 300, and is not particularly limited.

The second driven gear 42 is pivotally connected and fixed in the insulating rod 100, and the pivotally connection and fixing manner thereof can refer to the first screw 52, which is not described in detail.

The shaft rod 41 is inserted into the insulating rod 100, and one end of the shaft rod is fixedly connected with the surrounding driving component of the mechanism body 3, and the other end of the shaft rod movably passes through the second driven gear 42 and is in synchronous rotation fit with the second driven gear 42. This axostylus axostyle 41 can just can normally drive axostylus axostyle 41 and carry out elevating movement like this when the lifter 51 goes up and down with second driven gear 42 inner chamber sliding fit, when elevating movement targets in place, can drive axostylus axostyle 41 rotary motion through driving second driven gear 42 again, and then drives through the rotary motion of axostylus axostyle 41 and encircle drive assembly, and then realizes driving ultrasonic flaw detector 300 around porcelain insulator circular motion.

The switching mechanism 600 is installed in the insulation rod 100, and is connected to the driving mechanism 500, for driving the driving mechanism 500 to switch between a first transmission position and a second transmission position.

When the driving mechanism 500 moves to the first transmission position, the driving mechanism 500 is in transmission connection with the first driven gear 53, and at this time, the first driven gear 53 can be driven to move, so that the first screw 52 is driven to move, the lifting rod 51 is driven to move up and down, and the lifting control of the ultrasonic flaw detector 300 is also realized.

When actuating mechanism 500 moved to the second transmission position, actuating mechanism 500 was connected with the transmission of second driven gear 42, can be through driving the motion of second driven gear 42 this moment to drive the motion of axostylus axostyle 41, and then the drive encircles the operation of mechanism 200 body in order to drive ultrasonic flaw detector 300 around porcelain insulator circular motion.

According to the technical scheme, the ultrasonic detection device designed by the application can realize surrounding and lifting detection, and further can comprehensively and efficiently detect the object to be detected, so that the detection efficiency is improved. Moreover, this application drives actuating mechanism 500 through switching mechanism 600 and switches between first transmission position and second transmission position, realizes that one set of actuating mechanism 500 switching control encircles mechanism 200 and elevating system 400 to can install actuating mechanism 500 and switching mechanism 600 inside insulator spindle 100 together, make overall structure compacter, help reducing manufacturing cost, can form better protection to actuating mechanism 500 again, avoid the outer problem of leaking and fragile of automatically controlled module.

As shown in fig. 1, the following is another embodiment of an ultrasonic detection apparatus provided in the embodiments of the present application:

the scheme based on the first embodiment is as follows:

further, the mechanism body 3 is designed to include an arc-shaped base 31, an arc-shaped rail 311 is arranged at the top of the arc-shaped base 31, and two ends of the arc-shaped rail 311 penetrate through two ends of the arc-shaped base 31.

The arc rail 311 is slidably provided with an arc plate 32, one side of the arc plate 32 is in sliding contact with one side of the arc rail 311, and the other side of the arc plate 32 is provided with a toothed ring portion 321 and forms an arc gap groove with the other side of the arc rail 311.

Connecting shafts 36 are respectively fixed on the middle position and the position close to the end part of the arc-shaped clearance groove in a pivoted mode, namely the connecting shafts 36 are respectively fixed on the three positions in a pivoted mode; the connecting shaft 36 is extended into the shaft section of the arc-shaped clearance groove and is sleeved with the third driven gears 33 which are fixedly meshed with the gear ring part 321 in a one-to-one corresponding mode, the connecting shaft 36 is extended downwards out of the shaft section of the arc-shaped clearance groove and is sleeved with the fourth driven gears 34 in a one-to-one corresponding mode, the three fourth driven gears 34 are in transmission connection through the flexible parts 35, and one end of the shaft rod 41 is in synchronous rotation connection with the connecting shaft 36 located in the middle position.

Based on the design of the mechanism body 3, the surrounding control principle of the surrounding mechanism 200 is as follows: the shaft rod 41 rotates to drive the connecting shaft 36 at the middle position to rotate, and the fourth driven gear 34 on the connecting shaft 36 at the middle position is in transmission connection with the fourth driven gears 34 on the other two connecting shafts 36 through the flexible piece 35, so that the other two connecting shafts 36 are driven to move together synchronously and in the same direction. The effect that one shaft rod 41 can be used for synchronously driving a plurality of connecting shafts 36 to rotate is achieved, finally, the three third driven gears 33 are synchronously driven to rotate in the same direction, and the third driven gears 33 can rotate to drive the arc-shaped plate 32 to perform circular motion by utilizing the meshing between the third driven gears 33 and the gear ring portion 321, for example, from the state of fig. 2 to the state of fig. 3. In order to prevent the arc plate 32 from coming off the arc rail 311 in the direction perpendicular to the top surface of the arc base 31, a plurality of limiting screws (not shown) may be disposed at the edge of the arc rail 311 on the arc base 31, so as to achieve a certain limiting effect, and simultaneously, the movement of the arc plate 32 is not affected.

In addition, when the arc plate 32 moves circularly on the arc track 311, the gear ring part 321 is meshed with at least one third driven gear 33, that is, when the arc plate 32 moves circularly, at least one third driven gear 33 is meshed with the gear ring part 321 to provide driving force. Thus, during design, the design circumference of the arc plate 32 is required to be large enough, at least when the gear ring portion 321 at one end of the arc plate 32 is ready to be disengaged from the corresponding third driven gear 33, the gear ring portion 321 at the other end is engaged with the corresponding third driven gear 33 again, and the design circumference can be specifically adjusted according to actual needs without limitation.

The ultrasonic flaw detector 300 is mounted on the arc-shaped plate 32, and the specific mounting manner may be that the ultrasonic flaw detector is mounted and fixed by a corresponding fixing bracket (not shown), which is not limited.

Further, in order to limit the flexible member 35 and enable stable transmission fit between the three fourth driven gears 34, an arc-shaped groove 312 is formed at the bottom of the arc-shaped plate 32, and the arc-shaped groove 312 is used for accommodating the flexible member 35 and the three fourth driven gears 34.

Further, taking the fourth driven gear 34 as a belt gear as an example, the flexible member 35 is a timing belt. Of course, if the fourth driven gear 34 is a sprocket, the flexible member 35 can be a chain, and is not limited in particular.

Further, in order to further limit the flexible member 35 and protect the flexible member 35 and the fourth driven gear 34, a sealing cover 38 is detachably mounted on the arc-shaped groove 312, and one end of the connecting shaft 36 located at the middle position extends downwards to form the sealing cover 38 so as to be connected with the shaft 41.

Further, in order to facilitate the installation connection between the surrounding mechanism 200 and the lifting rod 51, a connection block 37 may be fixed at an inner position of the outer arc of the arc-shaped base 31, and the connection block 37 may be detachably connected to the top end of the lifting rod 51. Specifically, this connecting block 37 bottom can the slot, and the top that supplies lifter 51 inserts, is provided with first bolt hole on this connecting block 37's the lateral surface simultaneously, and lifter 51 stretches into the pole section of slot and is equipped with the second bolt hole, inserts the back of targetting in place at lifter 51, and first bolt hole aligns with the second bolt hole, and it is fixed in order to realize the locking to insert the bolt this moment, with this realization can dismantle the cooperation, of course, can also be other and dismantle the cooperation mode, do not restrict.

Further, to the extent that the drive mechanism 500 is designed, a first rotary electric machine 64 is included.

The switching mechanism 600 is connected to the first rotating electrical machine 64, the output shaft of the first rotating electrical machine 64 is synchronously connected to the extension rod 63, and the extension rod 63 is fixedly sleeved with the first driving gear 61 and the second driving gear 62.

When the first rotating electrical machine 64 moves to the first transmission position, the first driving gear 61 engages with the first driven gear 53; when the first rotating electric machine 64 is moved to the second transmission position, the second driving gear 62 is engaged with the second driven gear 42.

For the design of the extension rod 63, it includes the first rod 631 and the second rod 632, one end of the first rod 631 is provided with an inner groove 6311, one end of the second rod 632 is connected with the output shaft of the first rotating electrical machine 64 in a synchronous rotation manner, the other end of the second rod is movably inserted into the inner groove 6311 of the first rod 631, the second rod 632 is matched with the first rod 631 in a synchronous rotation manner, an elastic block 634 is further disposed between the other end of the second rod 632 and the bottom surface of the inner groove 6311, the second rod 632 is provided with an annular flange 6321, the second rod 632 is further provided with a connecting sleeve 633 having an inner thread surface, the outer thread surface of one end of the first rod 631 is provided with an outer thread surface matched with the connecting sleeve 633 in a thread manner, when the connecting sleeve 633 is fastened to one end of the first rod 631 in a thread manner, the other end of the second rod 632 is contacted and abutted against the elastic block 634, the annular flange 6321 is contacted and abutted against the connecting sleeve 633, and a buffer gap is provided between the annular flange 6321 and one end of the first rod 631, and the second driving gear 62 are fastened to the first rod 631. Through this design, both realized synchronous normal running fit between first body of rod 631 and the second body of rod 632, certain relative displacement can be realized because the effect of elasticity piece 634 each other simultaneously, it is also that this extension rod 63 has certain flexible volume of elasticity, for the lever structure that has certain flexible volume of elasticity, the flexible effect of elasticity, when can effectively reduce first driving gear 61 and the meshing of first driven gear 53, and the collision that takes place when second driving gear 62 and the meshing of second driven gear 42, effectively reduce the wearing and tearing between the gear, very big extension gear's life.

Further, the switching mechanism 600 includes the slider 71, the second rotating electric machine 73, and the second screw 72. In the present application, the second rotating electrical machine 73 and the first rotating electrical machine 64 are both servo motors that can rotate forward and backward, and are not particularly limited.

The sliding block 71 is slidably mounted in the insulating rod 100 along the axial direction of the insulating rod 100, in order to ensure that the sliding block 71 stably slides in the insulating rod 100, a guide protrusion strip may be disposed on the inner wall of the insulating rod 100, and a guide groove matched with the guide protrusion strip is disposed on the side wall of the sliding block 71, which is not limited in particular.

The first rotating motor 64 is installed on the sliding block 71, a threaded through hole for the second screw 72 to movably pass through and to be in threaded fit with the second screw 72 is formed in the sliding block 71, the second rotating motor 73 is installed in the insulating rod 100, and an output shaft is connected with one end of the second screw 72 in a synchronous rotating mode.

Based on the switching mechanism 600 designed as above, the second rotating electrical machine 73 rotates to drive the second screw 72 to rotate, and the second screw 72 is in threaded fit with the threaded through hole to drive the sliding block 71 to move up and down, so as to drive the first rotating electrical machine 64 to move up and down.

Further, the insulating rod 100 is further fixed with a hanging rack 2, and the hanging rack 2 is provided with a cross arm clamping groove 21, so that the hanging rack is conveniently clamped on a cross arm. The design of stores pylon 2 can be fixed the device on the cross arm for detection effect is more convenient, and need not the operation personnel hold insulator spindle 100 for a long time, and the design of this stores pylon 2 specifically can change the design according to actual need, does not do the restriction.

Further, insulator spindle 100 bottom is equipped with thread connection groove 1, and thread connection groove 1's design can be used for connecting extra action bars to increase operating length, satisfy the different high demands of detection, the suitability is better.

While the ultrasonic detection device provided in the present application has been described in detail, those skilled in the art will appreciate that the present disclosure is not limited thereto, and that the present disclosure can be modified in various embodiments and applications.

Claims

1. An ultrasonic testing device, comprising: the ultrasonic flaw detector comprises an insulating rod (100) with a hollow cavity, an ultrasonic flaw detector (300), a surrounding mechanism (200), a lifting mechanism (400), a driving mechanism (500) and a switching mechanism (600);

the lifting mechanism (400) is arranged in the insulating rod (100) and comprises a lifting rod (51) with an internal thread cavity, a first screw rod (52) and a first driven gear (53);

the lifting rod (51) is inserted into the insulating rod (100) and is in sliding fit with the insulating rod (100) along the axial direction of the insulating rod (100);

the first screw rod (52) is pivoted and fixed in the insulating rod (100), and one end of the first screw rod is in threaded connection with the inner threaded cavity of the lifting rod (51);

the first driven gear (53) is fixedly sleeved at the other end of the first screw rod (52);

the winding mechanism (200) comprises a mechanism body (3), a shaft rod (41) and a second driven gear (42);

the mechanism body (3) is arranged on one end, extending out of the insulating rod (100), of the lifting rod (51) and is connected with the ultrasonic flaw detector (300);

the second driven gear (42) is pivotally connected and fixed in the insulating rod (100);

the shaft rod (41) is inserted into the insulating rod (100), one end of the shaft rod is connected with the mechanism body (3), and the other end of the shaft rod movably penetrates through the second driven gear (42) and is in synchronous rotating fit with the second driven gear (42);

the switching mechanism (600) is arranged in the insulating rod (100), is connected with the driving mechanism (500) and is used for driving the driving mechanism (500) to switch between a first transmission position and a second transmission position;

when the driving mechanism (500) moves to the first transmission position, the driving mechanism (500) is in transmission connection with the first driven gear (53);

when the driving mechanism (500) moves to the second transmission position, the driving mechanism (500) is in transmission connection with the second driven gear (42);

the mechanism body (3) comprises an arc-shaped base (31);

the top of the arc-shaped base (31) is provided with an arc-shaped track (311);

two ends of the arc-shaped track (311) penetrate through two ends of the arc-shaped base (31);

an arc-shaped plate (32) is arranged on the arc-shaped track (311) in a sliding manner;

one side of the arc-shaped plate (32) is in sliding contact with one side of the arc-shaped track (311);

a gear ring part (321) is arranged on the other side edge of the arc-shaped plate (32) and an arc-shaped clearance groove is formed between the gear ring part and the other side edge of the arc-shaped track (311);

connecting shafts (36) are respectively pivoted and fixed at the middle position and the position close to the end part of the arc-shaped clearance groove;

the connecting shaft (36) extends into the shaft section of the arc-shaped clearance groove, and third driven gears (33) which are fixedly meshed with the gear ring parts (321) are sleeved on the shaft section of the arc-shaped clearance groove in a one-to-one corresponding mode;

fourth driven gears (34) are fixedly sleeved on shaft sections of the connecting shaft (36) extending out of the arc-shaped clearance groove in a one-to-one corresponding mode;

the three fourth driven gears (34) are in transmission connection through a flexible piece (35);

one end of the shaft lever (41) is synchronously and rotationally connected with the connecting shaft (36) positioned at the middle position;

the gear ring part (321) is meshed with at least one third driven gear (33) when the arc-shaped plate (32) moves circularly on the arc-shaped track (311);

the ultrasonic flaw detector (300) is mounted on the arc-shaped plate (32).

2. An ultrasonic testing device according to claim 1, characterized in that the bottom of the arc-shaped plate (32) is provided with an arc-shaped groove (312);

the arc-shaped groove (312) is used for accommodating the flexible piece (35) and the three fourth driven gears (34).

3. An ultrasonic testing device according to claim 1, characterized in that said fourth driven gear (34) is a toothed gear;

the flexible piece (35) is a synchronous belt.

4. An ultrasonic testing device according to claim 2, wherein the curved recess (312) has a sealing cap (38) removably mounted thereon;

one end of the connecting shaft (36) positioned at the middle position extends downwards to form the sealing cover (38).

5. An ultrasonic testing device according to claim 1, wherein a connecting block (37) is fixed at the middle position of the outer arc of the arc base (31);

the connecting block (37) is detachably connected with the top end of the lifting rod (51).

6. An ultrasonic testing device according to claim 1, characterized in that said drive mechanism (500) comprises a first rotary electric machine (64);

the switching mechanism (600) is connected to the first rotating electric machine (64);

an output shaft of the first rotating motor (64) is connected with an extension rod (63);

a first driving gear (61) and a second driving gear (62) are fixedly sleeved on the extension rod (63);

the first driving gear (61) is engaged with the first driven gear (53) when the first rotating electrical machine (64) is moved to a first transmission position;

the second drive gear (62) is engaged with the second driven gear (42) when the first rotary electric machine (64) is moved to a second transmission position.

7. An ultrasonic testing device according to claim 6, wherein said switching mechanism (600) comprises a slider (71), a second rotating electric machine (73) and a second screw (72);

the sliding block (71) is installed in the insulating rod (100) in a sliding mode along the axial direction of the insulating rod (100);

the first rotating electric machine (64) is mounted on the slide block (71);

the sliding block (71) is provided with a threaded through hole for the second screw rod (72) to movably pass through and to be in threaded fit with the second screw rod (72);

the second rotating motor (73) is arranged in the insulating rod (100) and an output shaft of the second rotating motor is synchronously and rotatably connected with one end of the second screw rod (72).

8. An ultrasonic testing device according to claim 1, wherein a hanger (2) is further fixed to the insulating rod (100);

and a cross arm clamping groove (21) is formed in the hanging rack (2).

9. An ultrasonic testing device according to claim 1, characterized in that the bottom of the insulating rod (100) is provided with a threaded connection groove (1).