Non-contact defect detection system for composite insulators based on ultrasonic phased array

Abstract

The present invention relates to the field of ultrasonic flaw detection technology and discloses a non-contact defect detection system for composite insulators based on an ultrasonic phased array. The system comprises a detection mechanism and a detection host. The detection mechanism comprises a transparent water tank and a rectangular frame fixedly mounted inside the transparent water tank. The bottom of the rectangular frame is integrally connected to a support leg. The bottom of the rectangular frame is provided with a fixing assembly. The top of the rectangular frame is provided with a pressing assembly. One side of the rectangular frame is provided with a detection assembly. The bottom of the support leg is fixedly mounted to the bottom of the transparent water tank. This non-contact defect detection system for composite insulators based on an ultrasonic phased array ensures that the central axis of the insulator, the fixing assembly, and the pressing assembly are aligned under the action of the fixing assembly and the pressing assembly. Non-contact defect detection of the composite insulator is performed by rotating the insulator and moving the phased array ultrasonic probe, ensuring accurate detection without damaging the insulator.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic flaw detection, and in particular to a non-contact defect detection system for composite insulators based on an ultrasonic phased array. Background Art

[0002] Composite insulators are crucial for the safe maintenance of power systems. Their function is to suspend conductors and isolate high-voltage lines from towers. Their quality is crucial for the safe maintenance of power systems. Since the 1950s, insulators have been successfully developed and widely used due to their advantages: small size, light weight, strong pollution resistance, and high insulation properties. However, factors such as insulator processing technology can lead to hidden defects such as fractured pores in the sheath and separation between the core rod and the sheath. These defects can adversely affect the safe maintenance of power grid systems.

[0003] To this end, we propose a non-contact defect detection system for composite insulators based on ultrasonic phased array. Summary of the Invention

[0004] In order to make up for the shortcomings of the existing technology, the present invention provides the following technical solution: a non-contact defect detection system for composite insulators based on ultrasonic phased array, including a detection mechanism and a detection host, the detection mechanism including a transparent water tank and a rectangular frame fixedly installed inside the transparent water tank, the bottom of the rectangular frame is integrally connected with a support leg, the bottom of the rectangular frame is provided with a fixing component, the top of the rectangular frame is provided with a downward pressure component, one side of the rectangular frame is provided with a detection component, and the bottom of the support leg is fixedly installed with the bottom of the transparent water tank.

[0005] Preferably, the fixing assembly includes a fixing plate, a waterproof motor, a turntable, a fixing block, a top plate, a movable groove, a lifting spring, a deflection rod, a connecting rod, a clamping rod, a telescopic block and a clamping spring. The fixing plate is fixedly installed on the bottom of the rectangular frame, the waterproof motor is fixedly installed from the bottom of the fixing plate, the output end of the waterproof motor is rotatably connected to the middle of the fixing plate, the turntable is fixedly installed on the output end of the waterproof motor, the turntable is located above the fixing plate, the fixing block is integrally arranged with the top of the turntable, the movable groove is arranged between adjacent fixing blocks, and the top plate It is slidingly connected to the inside of the fixed block, the bottom of the lifting spring is fixedly installed on the turntable, the top of the lifting spring is fixedly installed on the bottom of the top plate, one end of the deflection rod is rotatably connected to the bottom of the top plate, the middle part of the deflection rod is rotatably connected to the side wall of the movable groove, one end of the connecting rod is rotatably connected to the other end of the deflection rod, one end of the clamping rod is rotatably connected to the other end of the connecting rod, the middle part of the clamping rod is rotatably connected to the side wall of the movable groove, the telescopic block is slidably connected to the other end of the clamping rod, and the clamping spring is fixedly installed between the telescopic block and the clamping rod.

[0006] The cam is fixedly mounted on the support frame of the chassis, and the cam is secured to the chassis at the bottom with respect to the chassis.

[0007] Preferably, the detection component includes a guide rod, a lifting sleeve, a driving motor, an upper rotating shaft, a synchronous belt, a lower rotating shaft, and a phased array ultrasonic probe. The guide rod is fixedly installed on one side of the rectangular frame, the lifting sleeve is slidingly sleeved on the outside of the guide rod, the driving motor is fixedly installed on the side of the guide rod, the upper rotating shaft is actively connected to the top of the guide rod, one end of the upper rotating shaft is fixedly installed to the output end of the driving motor, the lower rotating shaft is rotatably connected to the bottom of the guide rod, the lower rotating shaft and the upper rotating shaft are connected by a synchronous belt transmission, the synchronous belt is fixedly connected to the side of the lifting sleeve close to the fixed component, and the phased array ultrasonic probe is fixedly installed to the side of the lifting sleeve close to the fixed component.

[0008] Preferably, a display screen and control buttons are provided on the front of the detection host, and the detection host is connected to the detection component via a data cable.

[0009] Preferably, there are four fixed blocks in total, the four fixed blocks are arc-shaped, the four fixed blocks are evenly arranged with the same center, and the top plate, the turntable and the fixed blocks are coaxially arranged.

[0010] Preferably, a groove is provided at the top end of the clamping rod, the telescopic block is slidably connected to the clamping rod through the groove, and the clamping spring is located inside the groove provided in the clamping rod.

[0011] Preferably, there are four connecting cross bars in total, each of which is integrally connected to a movable sleeve, and the angle between two adjacent connecting cross bars is ninety degrees.

[0012] Preferably, the central disc is coaxially arranged with the fixed component, an arc-shaped notch is provided at one end of the deflection block pointing to the axis, and the notch provided in the deflection block is chamfered.

[0013] Preferably, the phased array ultrasonic probe is connected to the detection host via a data cable, the synchronous belt is fixedly connected to the lifting sleeve in turn, and the other side of the synchronous belt is parallel to the side of the lifting sleeve and does not touch.

[0014] Beneficial effects

[0015] Compared with the existing technology, the present invention provides a non-contact defect detection system for composite insulators based on ultrasonic phased array, which has the following beneficial effects:

[0016] 1. This non-contact defect detection system for composite insulators based on ultrasonic phased array inserts the bottom of the composite insulator into the middle of four fixed blocks and squeezes the top plate downward, causing the deflection rod to rotate and the clamping rod to clamp toward the bottom of the insulator through the connecting rod. At the same time, the telescopic block contacts the bottom of the insulator and is tightened by the action of the clamping spring, so that the bottom of the insulator is clamped and fixed, and the central axis of the insulator coincides with the central axis of the fixed assembly, keeping the insulator in a vertical state, which is convenient for flaw detection.

[0017] 2. This ultrasonic phased array-based composite insulator non-contact defect detection system pulls the center disc upward and aligns the top of the insulator with the fixed ring. Under the action of the downward pressure spring, the entire center disc moves downward, allowing the top of the insulator to extend into the interior of the fixed ring and simultaneously lift the deflection block. Several deflection blocks, under the action of the clamping springs, push and hold the top of the insulator toward the central axis of the center disc. Under the action of the fixing component and the downward pressure component, the central axes of the insulator, the fixing component, and the downward pressure component are kept aligned, which facilitates the detection component to perform flaw detection inspection.

[0018] 3. This non-contact defect detection system for composite insulators based on ultrasonic phased array drives the upper rotating shaft to rotate through a driving motor, thereby rotating the synchronous belt and driving the lifting sleeve and the phased array ultrasonic probe to move up and down. The waterproof motor drives the turntable and insulator to rotate. The rotation of the insulator and the movement of the phased array ultrasonic probe are used to perform non-contact defect detection on the entire composite insulator, ensuring accurate detection without damaging the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the fixing assembly of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the fixing block of the present invention;

[0022] Figure 4 is a cross-sectional view of a fixing block of the present invention;

[0023] Figure 5 This is an enlarged view of the convex portion A in the present invention;

[0024] Figure 6 It is a structural schematic diagram of the pressing assembly of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the deflection block of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the detection component of the present invention.

[0027] In the figure: 1. Detection mechanism; 2. Detection host; 3. Data cable; 4. Transparent water tank; 5. Rectangular frame; 6. Fixing assembly; 61. Fixing plate; 62. Waterproof motor; 63. Turntable; 64. Fixing block; 65. Top plate; 66. Movable slot; 67. Lifting spring; 68. Deflection rod; 69. Connecting rod; 610. Clamping rod; 611. Telescopic block; 612. Clamping spring; 7. Pressing assembly; 71. Pressing spring Spring; 72. Movable sleeve; 73. Connecting crossbar; 74. Center disk; 75. Fixed ring; 76. Deflection groove; 77. Deflection block; 78. Tightening protrusion; 79. Shrapnel groove; 710. Clamping shrapnel; 8. Detection assembly; 81. Guide rod; 82. Lifting sleeve; 83. Drive motor; 84. Upper shaft; 85. Synchronous belt; 86. Lower shaft; 87. Phased array ultrasonic probe; 9. Support leg; 10. Display screen. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 8 The non-contact defect detection system for composite insulators based on ultrasonic phased array includes a detection mechanism 1 and a detection host 2. The detection mechanism 1 includes a transparent water tank 4 and a rectangular frame 5 fixedly installed inside the transparent water tank 4. The bottom of the rectangular frame 5 is integrally connected with a support leg 9, the bottom of the rectangular frame 5 is provided with a fixing component 6, the top of the rectangular frame 5 is provided with a pressing component 7, and a detection component 8 is provided on one side of the rectangular frame 5. The bottom of the support leg 9 is fixedly installed with the bottom of the transparent water tank 4.

[0030] As an embodiment of the present invention, the fixing assembly 6 includes a fixing plate 61, a waterproof motor 62, a turntable 63, a fixing block 64, a top plate 65, a movable groove 66, a lifting spring 67, a deflection rod 68, a connecting rod 69, a clamping rod 610, a telescopic block 611 and a clamping spring 612. The fixing plate 61 is fixedly installed on the bottom of the rectangular frame 5, the waterproof motor 62 is fixedly installed from the bottom of the fixing plate 61, the output end of the waterproof motor 62 is rotatably connected to the middle of the fixing plate 61, the turntable 63 is fixedly installed to the output end of the waterproof motor 62, the turntable 63 is located above the fixing plate 61, the fixing block 64 is integrally provided with the top of the turntable 63, the movable groove 66 is provided between adjacent fixing blocks 64, the top plate 65 is slidably connected to the inside of the fixing block 64, the bottom of the lifting spring 67 is fixedly installed on the turntable 63, the top of the lifting spring 67 is fixedly installed on the bottom of the top plate 65, the deflection rod 68 is fixedly installed on the bottom of the top plate 65, One end is rotatably connected to the bottom of the top plate 65, the middle part of the deflection rod 68 is rotatably connected to the side wall of the movable groove 66, one end of the connecting rod 69 is rotatably connected to the other end of the deflection rod 68, one end of the clamping rod 610 is rotatably connected to the other end of the connecting rod 69, the middle part of the clamping rod 610 is rotatably connected to the side wall of the movable groove 66, the telescopic block 611 is slidably connected to the other end of the clamping rod 610, and the clamping spring 612 is fixedly installed between the telescopic block 611 and the clamping rod 610. By inserting the bottom of the composite insulator into the middle of the four fixed blocks 64 and squeezing the top plate 65 downward, the deflection rod 68 is rotated and the clamping rod 610 is driven to clamp to the bottom of the insulator through the connecting rod 69. At the same time, the telescopic block 611 contacts the bottom of the insulator and is tightened under the action of the clamping spring 612, so that the bottom of the insulator is clamped and fixed while the central axis of the insulator coincides with the central axis of the fixed assembly 6.

[0031] As an embodiment of the present invention, the downward pressure component 7 includes a downward pressure spring 71, a movable sleeve 72, a connecting cross bar 73, a center disk 74, a fixing ring 75, a deflection groove 76, a deflection block 77, a tightening protrusion 78, a spring slot 79 and a clamping spring 710. The downward pressure spring 71 is sleeved on the vertical rod of the rectangular frame 5, and the top of the downward pressure spring 71 is fixedly installed with the top of the rectangular frame 5. The movable sleeve 72 is slidably sleeved on the outside of the vertical rod of the rectangular frame 5. The top of the movable sleeve 72 is fixedly installed with the bottom of the downward pressure spring 71. One end of the connecting cross bar 73 is fixedly connected to the movable sleeve 72. The center disk 74 is integrally arranged with the other end of the connecting cross bar 73. The center disk 74 is located directly above the fixing component 6. The fixing ring 75 is rotatably connected to the bottom of the center disk 74. The groove 76 is provided on the inner wall of the fixing ring 75, and the deflection block 77 is rotatably connected to the side wall of the deflection groove 76. The tightening protrusion 78 is integrally arranged with the bottom of the deflection block 77 near one end of the deflection groove 76. The spring slot 79 is provided at the top of the deflection block 77, and one end of the clamping spring 710 is fixedly installed with the spring slot 79. The other end of the clamping spring 710 is tightened against the inner wall of the deflection groove 76, pulling the center disk 74 upward and aligning the top of the insulator with the fixing ring 75. Under the action of the downward pressure spring 71, the entire center disk 74 moves downward, so that the top of the insulator extends into the interior of the fixed ring, and at the same time lifts the deflection block 77. Under the action of the clamping spring 710, several deflection blocks 77 push and hold the top of the insulator toward the central axis of the center disk 74.

[0032] As an embodiment of the present invention, the detection assembly 8 includes a guide rod 81, a lifting sleeve 82, a drive motor 83, an upper shaft 84, a synchronous belt 85, a lower shaft 86, and a phased array ultrasonic probe 87. The guide rod 81 is fixedly mounted on one side of the rectangular frame 5, the lifting sleeve 82 is slidably sleeved on the outside of the guide rod 81, the drive motor 83 is fixedly mounted on the side of the guide rod 81, the upper shaft 84 is actively connected to the top of the guide rod 81, one end of the upper shaft 84 is fixedly mounted to the output end of the drive motor 83, the lower shaft 86 is rotatably connected to the bottom of the guide rod 81, and the lower shaft 86 is rotatably connected to the upper The rotating shaft 84 is connected through a synchronous belt 85. The side of the synchronous belt 85 close to the fixed component 6 is fixedly connected to the side of the lifting sleeve 82. The phased array ultrasonic probe 87 is fixedly installed on the side of the lifting sleeve 82 close to the fixed component 6. The driving motor 83 drives the upper rotating shaft 84 to rotate, thereby rotating the synchronous belt 85 and driving the lifting sleeve 82 and the phased array ultrasonic probe 87 to move up and down. The waterproof motor 62 drives the turntable 63 and the insulator to rotate. The entire composite insulator is subjected to non-contact defect detection through the rotation of the insulator and the movement of the phased array ultrasonic probe 87.

[0033] As an embodiment of the present invention, a display screen 10 and control buttons are provided on the front of the detection host 2 , and the detection host 2 is connected to the detection component 8 via a data cable 3 .

[0034] As an embodiment of the present invention, there are four fixed blocks 64 in total. The four fixed blocks 64 are arc-shaped and evenly arranged concentrically. The top plate 65, the turntable 63 and the fixed blocks 64 are coaxially arranged.

[0035] As an embodiment of the present invention, a groove is provided at the top of the clamping rod 610 , the telescopic block 611 is slidingly connected to the clamping rod 610 through the groove, and the clamping spring 612 is located inside the groove provided in the clamping rod 610 .

[0036] As an embodiment of the present invention, four connecting cross bars 73 are provided in total, each connecting cross bar 73 is integrally connected to a movable sleeve 72, and the angle between two adjacent connecting cross bars 73 is ninety degrees.

[0037] As an embodiment of the present invention, the center disk 74 is coaxially arranged with the fixing assembly 6, and the end of the deflection block 77 pointing to the axis is provided with an arc-shaped notch, and the notch provided by the deflection block 77 is chamfered.

[0038] As an embodiment of the present invention, the phased array ultrasonic probe 87 is connected to the detection host 2 through the data cable 3, and the synchronous belt 85 is fixedly connected to the lifting sleeve 82 in turn, and the other side of the synchronous belt 85 is parallel to the side of the lifting sleeve 82 and does not contact.

[0039] It should be noted that when in use, the bottom of the composite insulator is inserted into the middle of the four fixed blocks 64, and the top plate 65 is squeezed downward to rotate the deflection rod 68, and the clamping rod 610 is driven to clamp to the bottom of the insulator through the connecting rod 69. At the same time, the telescopic block 611 contacts the bottom of the insulator and is tightened under the action of the clamping spring 612, so that the bottom of the insulator is clamped and fixed while the central axis of the insulator coincides with the central axis of the fixing assembly 6. Then the center disc 74 is pulled upward, and the top of the insulator is aligned with the fixing ring 75. Under the action of the downward pressure spring 71, the entire center disc 74 moves downward, so that the top of the insulator extends into the interior of the fixed body, and at the same time, the deflection block 77 is lifted up, and several deflection blocks Under the action of the clamping spring 710, 77 pushes the top of the insulator toward the central axis of the center disk 74 and holds it. Under the action of the fixing component 6 and the pressing component 7, the insulator keeps the central axis coincident with the fixing component 6 and the pressing component 7. After the fixation is completed, water is poured into the transparent water tank 4 until the insulator is completely submerged. The waterproof motor 62 and the drive motor 83 are started, and the upper rotating shaft 84 is driven to rotate by the drive motor 83, thereby rotating the synchronous belt 85 and driving the lifting sleeve 82 and the phased array ultrasonic probe 87 to move up and down. The waterproof motor 62 drives the turntable 63 and the insulator to rotate. The entire composite insulator is subjected to non-contact defect detection through the rotation of the insulator and the movement of the phased array ultrasonic probe 87.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-contact defect detection system for composite insulators based on an ultrasonic phased array, comprising a detection mechanism (1) and a detection host (2), characterized in that: The detection mechanism (1) comprises a transparent water tank (4) and a rectangular frame (5) fixedly mounted inside the transparent water tank (4); the bottom of the rectangular frame (5) is integrally connected with a support leg (9); the bottom of the rectangular frame (5) is provided with a fixing component (6); the top of the rectangular frame (5) is provided with a pressing component (7); one side of the rectangular frame (5) is provided with a detection component (8); the bottom of the support leg (9) is fixedly mounted with the bottom of the transparent water tank (4); The fixing assembly (6) includes a fixing plate (61), a waterproof motor (62), a turntable (63), a fixing block (64), a top plate (65), a movable groove (66), a lifting spring (67), a deflection rod (68), a connecting rod (69), a clamping rod (610), a telescopic block (611) and a clamping spring (612); the fixing plate (61) is fixedly mounted on the bottom of the rectangular frame (5); the waterproof motor (62) is fixedly mounted on the bottom of the fixing plate (61); the output end of the waterproof motor (62) is rotatably connected to the middle of the fixing plate (61); the turntable (63) is fixedly mounted on the output end of the waterproof motor (62); the turntable (63) is located above the fixing plate (61); the fixing block (64) is integrally arranged with the top of the turntable (63); and the movable groove (66) is arranged on an adjacent fixing block (64). The top plate (65) is slidably connected to the inside of the fixed block (64), the bottom of the lifting spring (67) is fixedly installed with the turntable (63), the top of the lifting spring (67) is fixedly installed with the bottom of the top plate (65), one end of the deflection rod (68) is rotatably connected to the bottom of the top plate (65), the middle of the deflection rod (68) is rotatably connected to the side wall of the movable groove (66), one end of the connecting rod (69) is rotatably connected to the other end of the deflection rod (68), one end of the clamping rod (610) is rotatably connected to the other end of the connecting rod (69), the middle of the clamping rod (610) is rotatably connected to the side wall of the movable groove (66), the telescopic block (611) is slidably connected to the other end of the clamping rod (610), and the clamping spring (612) is fixedly installed between the telescopic block (611) and the clamping rod (610); The downward pressing assembly (7) includes a downward pressing spring (71), a movable sleeve (72), a connecting cross bar (73), a central disk (74), a fixing ring (75), a deflection groove (76), a deflection block (77), a pressing protrusion (78), a spring slot (79) and a clamping spring (710). The downward pressing spring (71) is sleeved on the vertical pole of the rectangular frame (5), and the top of the downward pressing spring (71) is fixedly installed with the top of the rectangular frame (5). The movable sleeve (72) is slidably sleeved on the outside of the vertical pole of the rectangular frame (5), and the top of the movable sleeve (72) is fixedly installed with the bottom of the downward pressing spring (71). One end of the connecting cross bar (73) is fixedly connected to the movable sleeve (72). The central disk (74) is integrally arranged with the other end of the connecting cross bar (73), the center disc (74) is located just above the fixing assembly (6), the fixing ring (75) is rotatably connected to the bottom of the center disc (74), the deflection groove (76) is provided on the inner wall of the fixing ring (75), the deflection block (77) is rotatably connected to the side wall of the deflection groove (76), the pressing protrusion (78) is integrally arranged with the bottom of one end of the deflection block (77) close to the deflection groove (76), the shrapnel groove (79) is provided on the top of the deflection block (77), one end of the clamping shrapnel (710) is fixedly installed with the shrapnel groove (79), and the other end of the clamping shrapnel (710) is pressed against the inner wall of the deflection groove (76); There are four fixed blocks (64) in total, and the four fixed blocks (64) are arc-shaped. The four fixed blocks (64) are evenly arranged with the same center, and the top plate (65), the rotating disk (63) and the fixed blocks (64) are coaxially arranged. The central disc (74) is coaxially arranged with the fixed assembly (6); an arc-shaped notch is provided at one end of the deflection block (77) pointing toward the axis; and the notch provided in the deflection block (77) is chamfered.

2. The non-contact defect detection system for composite insulators based on ultrasonic phased array according to claim 1, characterized in that: The detection assembly (8) comprises a guide rod (81), a lifting sleeve (82), a drive motor (83), an upper rotating shaft (84), a synchronous belt (85), a lower rotating shaft (86), and a phased array ultrasonic probe (87). The guide rod (81) is fixedly mounted on one side of the rectangular frame (5). The lifting sleeve (82) is slidably sleeved on the outside of the guide rod (81). The drive motor (83) is fixedly mounted on the side of the guide rod. The upper rotating shaft (84) is connected to the top main shaft of the guide rod (81). The upper rotating shaft (84) is rotatably connected to the lower rotating shaft (86) and the lower rotating shaft (84). The lower rotating shaft (86) and the upper rotating shaft (84) are connected by a synchronous belt (85). The synchronous belt (85) is fixedly connected to the side of the lifting sleeve (82) on the side close to the fixed component (6). The phased array ultrasonic probe (87) is fixedly installed on the side of the lifting sleeve (82) close to the fixed component (6).

3. The non-contact defect detection system for composite insulators based on ultrasonic phased array according to claim 1, characterized in that: The front of the detection host (2) is provided with an encounter display screen (10) and control buttons, and the detection host (2) is connected to the detection component (8) via a data line (3).

4. The non-contact defect detection system for composite insulators based on ultrasonic phased array according to claim 1, characterized in that: A groove is provided at the top end of the clamping rod (610), the telescopic block (611) is slidably connected to the clamping rod (610) through the groove, and the clamping spring (612) is located inside the groove provided in the clamping rod (610).

5. The non-contact defect detection system for composite insulators based on ultrasonic phased array according to claim 1, characterized in that: There are four connecting cross bars (73) in total, each connecting cross bar (73) is integrally connected to a movable sleeve (72), and the angle between two adjacent connecting cross bars (73) is ninety degrees.

6. The non-contact defect detection system for composite insulators based on ultrasonic phased array according to claim 2, characterized in that: The phased array ultrasonic probe (87) is connected to the detection host (2) via a data line (3), and the synchronous belt (85) is fixedly connected to the lifting sleeve (82) in turn, and the other side of the synchronous belt (85) is parallel to and does not contact the side of the lifting sleeve (82).

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