Ultrasonic flaw detection device in narrow space

Abstract

The application discloses a kind of ultrasonic flaw detection devices in narrow space, it is related to ultrasonic flaw detection technical field, including in-depth pole, inner rotating shaft and adjusting assembly, adjusting assembly is equipped with self-adjusting protection assembly.The ultrasonic flaw detection device in narrow space disclosed in the application has the following effects: when the outermost level contact cover collides with the object inside the narrow space during the internal flaw detection operation in narrow space, the upper pressing block below the pressing rod is extruded to the adjusting spring rod, so that the lifting plate moves towards the inside of the protection cylinder, drives the ultrasonic probe to move to the inside of the protection cylinder, ensures that the ultrasonic probe on the lifting plate is in a safe environment, and when the outside of the level contact cover is not subjected to pressure during the movement of the protection cylinder, the ultrasonic probe on the lifting plate is reset by the adjusting spring rod, and the ultrasonic probe continues to work, ensuring the safety of the ultrasonic probe during operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic flaw detection device in a narrow space. BACKGROUND

[0002] Ultrasonic wave is a kind of sound wave with frequency higher than 20000 Hz, which has good directivity, strong penetration ability, easy to obtain concentrated sound energy, long propagation distance in water, and can be used for ranging, speed measurement, cleaning, welding, lithotripsy, sterilization and disinfection, etc. In medicine, military, industry and agriculture, there are many applications. Ultrasonic wave is named because its lower limit of frequency is higher than the upper limit of human hearing; when detecting the internal flaws of a narrow space, the ultrasonic flaw detection device can be used for detection.

[0003] The existing ultrasonic flaw detection device in a narrow space is prone to collision between the ultrasonic probe and the internal space of the narrow space during the process of placing the ultrasonic probe into the narrow space, resulting in damage to the ultrasonic probe and errors in the final detection results, thereby reducing the use value of the ultrasonic flaw detection device. SUMMARY

[0004] The present application discloses an ultrasonic flaw detection device in a narrow space, which aims to solve the technical problem that the existing ultrasonic flaw detection device in a narrow space is prone to collision between the ultrasonic probe and the internal space of the narrow space during the process of placing the ultrasonic probe into the narrow space, resulting in damage to the ultrasonic probe and errors in the final detection results.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] An ultrasonic flaw detection device in a narrow space, comprising a deep rod, an internal rotating shaft and an adjusting assembly, a self-adjusting protection assembly is arranged on the adjusting assembly, and the self-adjusting protection assembly comprises a protection cylinder, two adjusting grooves are formed on the outer side of the protection cylinder, and a lower support block is fixedly connected to the bottom end of each adjusting groove, an adjusting spring rod is fixedly connected to the top of each lower support block, an upper pressing block is fixedly connected to the top of each adjusting spring rod, the upper pressing blocks are slidably connected to the inside of the adjusting grooves, a lifting plate is fixedly connected to the opposite side of each upper pressing block, the lifting plate is slidably connected to the inside of the protection cylinder, a pressing rod is fixedly connected to the top of each upper pressing block, and a hierarchical contact cover is fixedly connected to the top of each pressing rod, the radius of the hierarchical contact cover gradually increases from top to bottom, an ultrasonic probe is fixedly connected to the top of the lifting plate, a closing protection sheet is hingedly connected to the top of the ultrasonic probe outside the lifting plate at equal distances, and the closing protection sheet is wavy.

[0007] By setting the self-adjusting protection assembly, when the internal flaw detection operation in the narrow space is carried out, the deep rod is deep into the narrow space, and when the ultrasonic probe moves, the mutual force makes the upper pressing block below the pressing rod extrude the adjusting spring rod, so that the lifting plate moves towards the inside of the protection cylinder, drives the ultrasonic probe to move to the inside of the protection cylinder, and the ultrasonic probe moves in the process, each closed protection sheet is in contact with the protection cylinder, and the closed protection sheet is deflected and moves towards the direction close to the ultrasonic probe in the process, so as to form a closed loop protection cover, so as to ensure that the ultrasonic probe on the lifting plate is in a safe environment, and when the outside of the hierarchical contact cover is not subjected to pressure, the adjusting spring rod drives the ultrasonic probe on the lifting plate to reset, and the ultrasonic probe continues to work.

[0008] In a preferred scheme, the adjusting assembly comprises an adjusting rail, and an adjusting sliding block is slidably connected inside the adjusting rail.

[0009] In a preferred scheme, the outer side of the inner rotating shaft is fixedly connected with a sleeve, and the top of the sleeve is fixedly connected with a mounting rod, and the adjusting rail is fixedly connected to the top of the mounting rod.

[0010] In a preferred scheme, the top of the sleeve is fixedly connected with a driving motor, the output shaft of the driving motor is fixedly connected with a driving shaft through a shaft coupling, the outer side of the driving shaft is fixedly connected with a driving gear, the top of the sleeve close to the driving motor is connected with a driven shaft through a bearing, the outer side of the driven shaft is fixedly connected with a driven gear, and the driving gear and the driven gear are engaged.

[0011] In a preferred scheme, the top of the driven shaft is connected with a first connecting rod through a hinge, and the top of the adjusting sliding block is connected with a second connecting rod through a hinge.

[0012] In a preferred scheme, the first connecting rod and the second connecting rod are connected through a hinge, and the bottom of the first connecting rod and the second connecting rod is fixedly connected with the same limiting spring rod.

[0013] By setting the adjusting assembly, after moving the ultrasonic probe into the narrow space, when the ultrasonic probe is moved for a short distance, the driving motor is started, the driving motor drives the driven gear to rotate through the driving gear, so as to drive the adjusting slider to rotate in the adjusting rail through the first connecting rod and the second connecting rod, the adjusting rail is a small part of the annular rail, and the angle between the adjusting rail and the mounting rod is less than 30°, so that the device cannot enter the narrow space during the position adjustment of the ultrasonic probe, and the convenience of the ultrasonic probe adjustment is improved, and the use value of the ultrasonic flaw detection device is improved.

[0014] In a preferred scheme, the deep rod is provided with a through mounting hole, and the inner rotating shaft is inserted into the mounting hole, and one end of the inner rotating shaft is fixedly connected with a cross handle.

[0015] In a preferred scheme, one end of the deep rod is fixedly connected with an annular guide rail, and the outer side of the annular guide rail is fixedly connected with a rotating slider close to the inner rotating shaft, and the plurality of rotating sliders are slidingly connected to the inside of the annular guide rail.

[0016] In a preferred scheme, the outer fixed ring is fixedly connected to the outer side close to the other end of the deep rod, and the annular iron plate is arranged on the side of the outer fixed ring facing the cross handle.

[0017] In a preferred scheme, the cross handle is provided with an electromagnet on the side facing the annular iron plate, and the electromagnet is in contact with the annular iron plate.

[0018] By setting the inner rotating shaft, the cross handle, the annular iron plate and the electromagnet, when the ultrasonic probe is rotated, the staff manually twists the cross handle to drive the inner rotating shaft to rotate in the deep rod, and in the rotating process, the rotating slider rotates in the annular guide rail, so as to realize the limitation of the inner rotating shaft, and after the rotation is completed, the electromagnet is electrified, and the annular iron plate is quickly adsorbed on the outer side of the electromagnet, so as to complete the position fixing of the ultrasonic probe, which is convenient and fast, and improves the overall efficiency of the ultrasonic flaw detection.

[0019] In a preferred scheme, the inside of the protective cylinder is provided with a failure emergency assembly, and the failure emergency assembly comprises two half enclosing frames, both of which are close to the adjusting spring rods, the bottom inner wall of the protective cylinder is fixedly connected with an inner column, the top of the inner column is fixedly connected with an electric telescopic rod one, the output end of the electric telescopic rod one is fixedly connected with a jacking block, the two sides of the jacking block facing the two adjusting spring rods are both fixedly connected with electric telescopic rods two, both of the half enclosing frames are fixedly connected to the output ends of the electric telescopic rods two, the outer sides of the half enclosing frames facing the adjusting spring rods are both hingedly connected with two adjusting pressure plates, the outer sides of the half enclosing frames close to the two adjusting pressure plates are both fixedly connected with side plates, the outer sides of the side plates facing the adjusting pressure plates are equidistantly hingedly connected with hydraulic cylinders, the output ends of the hydraulic cylinders are both hingedly connected to the outer sides of the adjusting pressure plates, and the opposite sides of the two adjusting pressure plates on the same half enclosing frame are both equidistantly fixedly connected with uplift friction teeth.

[0020] By setting the failure emergency assembly, if the adjusting spring rods at the lower part cannot be reset after being compressed, the ultrasonic probe cannot be smoothly ejected from the protective cylinder, and the ultrasonic probe cannot complete the flaw detection operation, in this case, the adjusting electric telescopic rods two drive the half enclosing frames to move to the outer sides of the adjusting spring rods, then the adjusting hydraulic cylinders drive the adjusting pressure plates to clamp the outer sides of the adjusting spring rods, the uplift friction teeth increase the friction force at the connection, and then the adjusting electric telescopic rod one drives the adjusting spring rods to rise, so that the ultrasonic probe can be smoothly moved out of the protective cylinder, and the failure processing function of the flaw detection device is increased.

[0021] As can be known from the above, the ultrasonic flaw detection device in a narrow space provided by the application has the technical effects that when the flaw detection operation in the narrow space is performed, the deepening rod is deepened into the narrow space, when the ultrasonic probe moves, because the specific conditions in the narrow space are not clear, when the outermost layer contact cover collides with the object in the narrow space, the interaction force causes the upper pressing block below the pressing rod to press the adjusting spring rods, so that the lifting plate moves towards the inside of the protective cylinder, and drives the ultrasonic probe to move into the protective cylinder, during the movement of the ultrasonic probe, each closed protective sheet contacts the protective cylinder, during the contact, the closed protective sheet deflects and moves towards the direction close to the ultrasonic probe, so as to form a closed-loop protective cover, and the ultrasonic probe on the lifting plate is ensured to be in a safe environment, and as the protective cylinder moves, when the outer side of the layer contact cover is not subjected to pressure, the adjusting spring rods drive the ultrasonic probe on the lifting plate to reset, and the ultrasonic probe continues to work, so that the safety during the working process of the ultrasonic probe is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a schematic diagram of the overall structure of the ultrasonic flaw detection device in a narrow space.

[0023] Figure 2 The overall structure of the ultrasonic flaw detector in a narrow space is shown in the front view.

[0024] Figure 3 The self-adjusting protection assembly of the ultrasonic flaw detector in a narrow space is shown in the schematic view.

[0025] Figure 4 The internal structure of the protection cylinder of the ultrasonic flaw detector in a narrow space is shown in the schematic view.

[0026] Figure 5 The adjusting assembly of the ultrasonic flaw detector in a narrow space is shown in the schematic view.

[0027] Figure 6 The plane structure of the ultrasonic flaw detector in a narrow space is shown in the schematic view. Figure 5

[0028] Figure 7 The internal rotating shaft and external deep rod combined structure of the ultrasonic flaw detector in a narrow space is shown in the schematic view.

[0029] Figure 8 The protection cylinder structure of the ultrasonic flaw detector in a narrow space is shown in the sectional view.

[0030] Figure 9 The fault emergency assembly of the ultrasonic flaw detector in a narrow space is shown in the schematic view.

[0031] In the figure: 1, deep rod; 2, cross-shaped rotating handle; 3, outer fixing ring; 4, internal rotating shaft; 5, adjusting assembly; 501, adjusting rail; 502, adjusting sliding block; 503, limiting spring rod; 504, No. 1 connecting rod; 505, No. 2 connecting rod; 506, driving motor; 507, driven gear; 508, driven shaft; 509, driving shaft; 510, driving gear; 6, sleeve; 7, mounting rod; 8, self-adjusting protection assembly; 801, protection cylinder; 802, pressing rod; 803, ultrasonic probe; 804, hierarchical contact cover; 805, adjusting spring rod; 806, upper pressing block; 807, adjusting groove; 808, closed protection sheet; 809, lower supporting block; 810, lifting plate; 9, mounting plate; 10, annular guide rail; 11, rotating sliding block; 12, electromagnet; 13, annular iron plate; 14, fault emergency assembly; 1401, half-enclosing frame; 1402, jacking block; 1403, internal column; 1404, electric telescopic rod 1; 1405, electric telescopic rod 2; 1406, adjusting pressing plate; 1407, side plate; 1408, hydraulic cylinder; 1409, upward friction tooth. DETAILED DESCRIPTION

[0032] ​Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0033] The ultrasonic flaw detection device in a narrow space disclosed in the application is mainly applied to the existing ultrasonic flaw detection device in a narrow space. In the use process of the ultrasonic flaw detection device in a narrow space, the environment inside the narrow space is unclear, and the ultrasonic probe is easily collided with the inside of the narrow space in the process of being put into the narrow space by the staff, so that the ultrasonic probe is damaged, and the final detection result is wrong.

[0034] Referring to Figures 1-9 The ultrasonic flaw detection device in a narrow space comprises a deep rod 1, an inner rotating shaft 4 and an adjusting assembly 5, a self-adjusting protection assembly 8 is arranged on the adjusting assembly 5, the self-adjusting protection assembly 8 comprises a protection cylinder 801, two adjusting grooves 807 are formed in the outer side of the protection cylinder 801, lower support blocks 809 are fixedly connected to the bottom ends of the two adjusting grooves 807, adjusting spring rods 805 are fixedly connected to the top portions of the two lower support blocks 809, an upper pressing block 806 is fixedly connected to the top portions of the two adjusting spring rods 805, the two upper pressing blocks 806 are slidably connected to the interiors of the two adjusting grooves 807, a lifting plate 810 is fixedly connected to the opposite sides of the two upper pressing blocks 806, the lifting plate 810 is slidably connected to the interior of the protection cylinder 801, pressing rods 802 are fixedly connected to the top portions of the two upper pressing blocks 806, a hierarchical contact cover 804 is fixedly connected to the top portions of the two pressing rods 802, the hierarchical contact cover 804 is gradually increased in radius from top to bottom, an ultrasonic probe 803 is fixedly connected to the top portion of the lifting plate 810, a closing protection sheet 808 is hingedly connected to the top portion of the ultrasonic probe 803 at equal distances on the outer side of the lifting plate 810, and the closing protection sheet 808 is in a wavy shape.

[0035] In a specific application scenario, when the inside of a narrow space is detected, the deep rod 1 is deep into the inside of the narrow space, and when the ultrasonic probe 803 is moved, because the specific situation inside the narrow space is not clear, when the outermost layer contact cover 804 collides with the object inside the narrow space, the interaction force causes the upper pressing block 806 below the pressing rod 802 to press the adjusting spring rod 805, so that the lifting plate 810 moves towards the inside of the protection cylinder 801, driving the ultrasonic probe 803 to move to the inside of the protection cylinder 801, and during the movement of the ultrasonic probe 803, each closed protection sheet 808 contacts the protection cylinder 801, and during the contact, the closed protection sheet 808 is deflected and moves towards the ultrasonic probe 803, thereby forming a closed loop protection cover, ensuring that the ultrasonic probe 803 on the lifting plate 810 is in a safe environment, and when the outer side of the layer contact cover 804 is not subjected to pressure, the adjusting spring rod 805 drives the ultrasonic probe 803 on the lifting plate 810 to reset, and the ultrasonic probe 803 continues to work.

[0036] Referring to Figure 1 、 Figure 2 、 Figure 5 and Figure 6 In a preferred embodiment, the adjusting assembly 5 comprises an adjusting rail 501, and an adjusting sliding block 502 is slidably connected inside the adjusting rail 501, the outer side of the adjusting sliding block 502 is fixedly connected with a mounting plate 9, the protection cylinder 801 is fixedly connected to the top of the mounting plate 9, the outer side of the inner rotating shaft 4 is fixedly connected with a sleeve 6, the top of the sleeve 6 is fixedly connected with a mounting rod 7, and the adjusting rail 501 is fixedly connected to the top of the mounting rod 7.

[0037] In the application, the top of the sleeve 6 is fixedly connected with a driving motor 506, the output shaft of the driving motor 506 is fixedly connected with a driving shaft 509 through a shaft coupling, the outer side of the driving shaft 509 is fixedly connected with a driving gear 510, the top of the sleeve 6 close to the driving motor 506 is connected with a driven shaft 508 through a bearing, the outer side of the driven shaft 508 is fixedly connected with a driven gear 507, the driving gear 510 and the driven gear 507 are engaged, the top of the driven shaft 508 is connected with a first connecting rod 504 through a hinge, and the top of the adjusting sliding block 502 is connected with a second connecting rod 505 through a hinge.

[0038] In the application, the first connecting rod 504 and the second connecting rod 505 are connected through a hinge, and the bottom of the first connecting rod 504 and the second connecting rod 505 are fixedly connected with the same limiting spring rod 503.

[0039] Specifically, after the ultrasonic probe 803 is moved into the narrow space, when the ultrasonic probe 803 is moved for a short distance, the driving motor 506 is started, the driving motor 506 drives the driven gear 507 to rotate through the driving gear 510, so that the adjusting slider 502 is driven to rotate in the adjusting rail 501 through the first connecting rod 504 and the second connecting rod 505, the adjusting rail 501 is a small part of the annular rail, and the angle between the adjusting rail 501 and the mounting rod 7 is less than 30°, so that the device cannot enter the narrow space during the position adjustment of the ultrasonic probe 803, and the convenience of the ultrasonic probe 803 adjustment is improved, and the use value of the ultrasonic flaw detection device is improved.

[0040] With reference to Figure 1 , Figure 2 and Figure 7 In a preferred embodiment, a through mounting hole is formed in the deep rod 1, and the inner rotating shaft 4 is inserted into the mounting hole. One end of the inner rotating shaft 4 is fixedly connected with the cross handle 2. One end of the deep rod 1 is fixedly connected with the annular guide rail 10. The outer side of the inner rotating shaft 4 close to the annular guide rail 10 is fixedly connected with the rotating slider 11. The plurality of rotating sliders 11 are slidingly connected to the inside of the annular guide rail 10.

[0041] In the present application, the outer side of the deep rod 1 close to the other end is fixedly connected with the outer fixed ring 3. The side of the outer fixed ring 3 facing the cross handle 2 is provided with an annular iron plate 13. The side of the cross handle 2 facing the annular iron plate 13 is provided with an electromagnet 12. The electromagnet 12 is in contact with the annular iron plate 13.

[0042] It should be noted that when the ultrasonic probe 803 is rotated, the staff manually twists the cross handle 2 to drive the inner rotating shaft 4 to rotate in the deep rod 1. During the rotation, the rotating slider 11 rotates in the annular guide rail 10, so as to limit the rotation of the inner rotating shaft 4. After the rotation is completed, the electromagnet 12 is energized, and the annular iron plate 13 is quickly adsorbed to the outer side of the electromagnet 12 to complete the position fixing of the ultrasonic probe 803, which is convenient and fast, and improves the overall efficiency of the ultrasonic flaw detection.

[0043] With reference to Figure 1 , Figure 2 , Figure 8 and Figure 9In a preferred implementation, the inside of the protection cylinder 801 is provided with the failure emergency assembly 14, and the failure emergency assembly 14 comprises two half enclosing frames 1401, both of which are close to the adjusting spring rods 805, the bottom inner wall of the protection cylinder 801 is fixedly connected with an inner column 1403, the top of the inner column 1403 is fixedly connected with an electric telescopic rod one 1404, the output end of the electric telescopic rod one 1404 is fixedly connected with a jacking block 1402, the jacking block 1402 is fixedly connected with an electric telescopic rod two 1405 on the two sides facing the two adjusting spring rods 805, both of the half enclosing frames 1401 are fixedly connected to the output end of the electric telescopic rod two 1405, the half enclosing frame 1401 is hingedly connected with two adjusting pressure plates 1406 on the outer side facing the adjusting spring rod 805, the outer side close to the two adjusting pressure plates 1406 of the half enclosing frame 1401 is fixedly connected with a side plate 1407, the side plate 1407 is hingedly connected with a hydraulic cylinder 1408 at equal distances on the outer side facing the adjusting pressure plate 1406, the output end of the hydraulic cylinder 1408 is hingedly connected to the outer side of the adjusting pressure plate 1406, and the opposite sides of the two adjusting pressure plates 1406 on the same half enclosing frame 1401 are fixedly connected with uplift friction teeth 1409 at equal distances.

[0044] Specifically, after the adjusting spring rod 805 is compressed to the lower side, if the adjusting spring rod 805 at this position cannot be reset subsequently, the ultrasonic probe 803 cannot be smoothly ejected from the protection cylinder 801, and the ultrasonic probe 803 cannot complete the flaw detection operation. In this case, the adjusting electric telescopic rod two 1405 drives the half enclosing frame 1401 to move to the outer side of the adjusting spring rod 805, and then the adjusting hydraulic cylinder 1408 drives the adjusting pressure plate 1406 to clamp the outer side of the adjusting spring rod 805, the uplift friction teeth 1409 increase the friction force at the connection, and then the adjusting electric telescopic rod one 1404 drives the adjusting spring rod 805 to rise, so as to ensure that the ultrasonic probe 803 can be smoothly removed from the protection cylinder 801, and the failure processing function of the flaw detection device is increased.

[0045] Working principle: when using, after moving the ultrasonic probe 803 to the inside of the narrow space, the driving motor 506 is started when the ultrasonic probe 803 is moved for a short distance, the driving motor 506 drives the driven gear 507 to rotate through the driving gear 510, so as to drive the adjusting slider 502 to rotate in the adjusting rail 501 through the first connecting rod 504 and the second connecting rod 505, the adjusting rail 501 is a small part of the annular rail, and the angle between the adjusting rail 501 and the mounting rod 7 is less than 30°, so that the device cannot enter the inside of the narrow space during the position adjustment of the ultrasonic probe 803, when the ultrasonic probe 803 is moved for a short distance and rotated, the staff manually twists the cross handle 2, drives the inner rotating shaft 4 to rotate in the deep rod 1, in the rotating process, the rotating slider 11 rotates in the annular guide rail 10, so as to realize the limitation of the inner rotating shaft 4, after the rotation is completed, the electromagnet 12 is electrified, the annular iron plate 13 is quickly adsorbed on the outside of the electromagnet 12, and the position fixing of the ultrasonic probe 803 is completed, after the position of the ultrasonic probe 803 is fixed, the deep rod 1 is pushed to drive it to continuously advance during the flaw detection, when the outermost layer contact cover 804 collides with the object in the narrow space, the interaction force makes the upper pressing block 806 below the pressing rod 802 extrude the adjusting spring rod 805, so that the lifting plate 810 moves to the inside of the protection cylinder 801, drives the ultrasonic probe 803 to move to the inside of the protection cylinder 801, in the moving process of the ultrasonic probe 803, each closed protection piece 808 contacts the protection cylinder 801, in the contacting process, the closed protection piece 808 deflects and moves to the direction close to the ultrasonic probe 803, so as to form a closed loop protection cover, so that the ultrasonic probe 803 on the lifting plate 810 is in a safe environment, with the movement of the protection cylinder 801, when the outer side of the layer contact cover 804 is not pressed, the ultrasonic probe 803 on the lifting plate 810 is reset under the action of the adjusting spring rod 805, and the ultrasonic probe 803 continues to work.

[0046] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An ultrasonic flaw detection device in a narrow space, comprising a deep rod (1), an inner rotating shaft (4) and an adjusting assembly (5), characterized in that, The adjusting assembly (5) is provided with a self-adjusting protection assembly (8), and the self-adjusting protection assembly (8) comprises a protection cylinder (801), two adjusting grooves (807) are formed in the outer side of the protection cylinder (801), and a lower supporting block (809) is fixedly connected to the bottom end of each of the two adjusting grooves (807). The top of each of the two lower supporting blocks (809) is fixedly connected with an adjusting spring rod (805), the top of each of the two adjusting spring rods (805) is fixedly connected with an upper pressing block (806), each of the two upper pressing blocks (806) is slidably connected to the inside of the adjusting groove (807), and the opposite side of each of the two upper pressing blocks (806) is fixedly connected with the same lifting plate (810) which is slidably connected to the inside of the protection cylinder (801). The top of each of the two upper pressing blocks (806) is fixedly connected with a pressing rod (802), and the top of each of the two pressing rods (802) is fixedly connected with the same hierarchical contact cover (804) which has a gradually increasing radius from top to bottom. The top of the lifting plate (810) is fixedly connected with an ultrasonic probe (803), and the top of the lifting plate (810) outside the ultrasonic probe (803) is connected with a closing protection sheet (808) at equal distances through a hinge, and the closing protection sheet (808) is in a wavy shape.

2. The ultrasonic flaw detection device for use in a narrow space according to claim 1, wherein The adjusting assembly (5) comprises an adjusting rail (501), and an adjusting sliding block (502) is slidably connected to the inside of the adjusting rail (501). The outer side of the adjusting sliding block (502) is fixedly connected with a mounting plate (9), and the protection cylinder (801) is fixedly connected to the top of the mounting plate (9).

3. The ultrasonic flaw detection device for use in a narrow space according to claim 2, wherein The outer side of the inner rotating shaft (4) is fixedly connected with a sleeve (6), and the top of the sleeve (6) is fixedly connected with a mounting rod (7). The adjusting rail (501) is fixedly connected to the top of the mounting rod (7).

4. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 3, wherein The top of the sleeve (6) is fixedly connected with a driving motor (506), the output shaft of the driving motor (506) is fixedly connected with a driving shaft (509) through a shaft coupling, the outer side of the driving shaft (509) is fixedly connected with a driving gear (510), the top of the sleeve (6) close to the driving motor (506) is connected with a driven shaft (508) through a bearing, the outer side of the driven shaft (508) is fixedly connected with a driven gear (507), and the driving gear (510) and the driven gear (507) are in engagement.

5. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 4, wherein The top of the driven shaft (508) is connected with a first connecting rod (504) through a hinge, and the top of the adjusting sliding block (502) is connected with a second connecting rod (505) through a hinge.

6. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 5, wherein The first connecting rod (504) and the second connecting rod (505) are connected through a hinge, and the bottom of each of the first connecting rod (504) and the second connecting rod (505) is fixedly connected with the same limiting spring rod (503).

7. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 1, wherein A penetrating mounting hole is formed in the deepening rod (1), and the inner rotating shaft (4) is inserted into the mounting hole. One end of the inner rotating shaft (4) is fixedly connected with a cross-shaped rotating handle (2).

8. The ultrasonic flaw detection device for use in a narrow space according to claim 7, wherein One end of the deep rod (1) is fixedly connected with an annular guide rail (10), and the inner rotating shaft (4) is fixedly connected with a rotating slider (11) close to the outer side of the annular guide rail (10), and the plurality of rotating sliders (11) are slidingly connected to the inside of the annular guide rail (10).

9. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 8, wherein The outer side close to the other end of the deep rod (1) is fixedly connected with an outer fixed ring (3), and the outer fixed ring (3) is provided with an annular iron plate (13) on the side facing the cross handle (2), the cross handle (2) is provided with an electromagnet (12) on the side facing the annular iron plate (13), and the electromagnet (12) is in contact with the annular iron plate (13).

10. The ultrasonic flaw detection apparatus for use in a narrow space according to claim 1, wherein The inside of the protection cylinder (801) is provided with a fault emergency assembly (14), and the fault emergency assembly (14) comprises two half enclosing frames (1401), the two half enclosing frames (1401) are close to the adjusting spring rods (805), the bottom inner wall of the protection cylinder (801) is fixedly connected with an inner column (1403), the top of the inner column (1403) is fixedly connected with an electric telescopic rod one (1404), the output end of the electric telescopic rod one (1404) is fixedly connected with a jacking block (1402), the two sides of the jacking block (1402) facing the two adjusting spring rods (805) are fixedly connected with an electric telescopic rod two (1405), the two half enclosing frames (1401) are fixedly connected to the output end of the electric telescopic rod two (1405), the outer side of the half enclosing frame (1401) facing the adjusting spring rod (805) is hingedly connected with two adjusting pressure plates (1406), the outer side of the half enclosing frame (1401) close to the two adjusting pressure plates (1406) is fixedly connected with a side plate (1407), the outer side of the side plate (1407) facing the adjusting pressure plate (1406) is hingedly connected with a hydraulic cylinder (1408) at equal distances, the output end of the hydraulic cylinder (1408) is hingedly connected to the outer side of the adjusting pressure plate (1406), and the opposite sides of the two adjusting pressure plates (1406) located on the same half enclosing frame (1401) are fixedly connected with uplift friction teeth (1409) at equal distances.

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