A multi-step self-triggering porcelain post insulator vibration detection device

Abstract

The utility model relates to a kind of multi-gear self-triggering porcelain post insulator vibration detection devices, belong to mechanical vibration detection equipment technical field, comprising: shell and signal acquisition component, the top surface of shell is equipped with signal hole and fixed hole;Signal acquisition component includes guide rod linear bearing, guide rod, compression disc, reset spring, trigger block, collection cylinder, protective cover, vibration sensor, amplitude bar and limit rod, guide rod linear bearing is fixed in signal hole and its upper is equipped with the through hole opposite with fixed hole;Guide rod slides in guide rod linear bearing;Trigger block is equipped with the limit hole of being opposite with the through hole arrangement and being connected in guide rod bottom end;Collection cylinder is located shell outside and is connected in guide rod top end;Limit rod is fixed in fixed hole and the through hole in turn and is slidably inserted into limit hole.The utility model uses limit rod and is fixed in fixed hole and the through hole in turn and slidably inserted into limit hole, can limit trigger block sliding, improve structural stability and measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of mechanical vibration testing equipment, and in particular to a multi-stage self-triggered porcelain post insulator vibration testing device. Background Technology

[0002] Porcelain post insulators in substations are typically used to support conductors and provide insulation, operating in environments with voltages ranging from 10 to 500 kV. In actual operation, structural faults in insulators can lead to high-voltage breakdown due to strength failure, or even insulator breakage, resulting in dangerous accidents such as fires. Therefore, the inspection of insulator mechanical structure problems is a crucial step.

[0003] Currently popular insulator testing technologies include visual inspection, X-ray imaging, and ultrasonic testing. However, these methods cannot perform live-line testing, causing inconvenience for the routine maintenance of porcelain post insulators in substations. The recently developed vibration acoustic testing method can only transfer data to a computer via USB cable for analysis after testing, failing to provide real-time diagnosis and reducing testing efficiency.

[0004] In addition, the complex on-site testing environment can also cause inconvenience during the testing process. Using traditional testing methods, it is necessary to manually provide the excitation signal. The testing process is not only affected by the instrument itself, but the amplitude and incident angle of the excitation signal will also be different each time due to the operation of the personnel, thus affecting the testing.

[0005] To address the aforementioned technical problems, an automatically triggered vibration detection device for porcelain post insulators has been developed. For example, patent number CN217688729U, entitled "An Automatically Triggered Vibration Detection Device for Porcelain Post Insulators," describes a method where a pulse excitation device first strikes the porcelain post insulator, and then a signal acquisition device collects the peak value of the insulator's natural frequency, accurately determining whether a fault exists. However, in practical applications, the cartridge trigger slider is prone to rotation, leading to unstable excitation and detection, resulting in deviations in the measured values. Furthermore, the sliding contact between the contact and the cartridge trigger slider, being a rigid sliding friction, is prone to wear, easily causing the pulse conductor to fail to eject or eject at inaccurate timing.

[0006] Therefore, how to design a multi-stage self-triggered porcelain post insulator vibration detection device with a low wiping coefficient, long service life and accurate measurement is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] This invention provides a multi-stage self-triggered porcelain post insulator vibration detection device, which solves the technical problems of inaccurate measurement and severe wear of existing insulator detection devices.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a multi-stage self-triggered porcelain post insulator vibration detection device, comprising: a housing, a signal acquisition component, and a control mechanism.

[0009] The top surface of the housing is provided with a signal hole and a fixing hole; the signal acquisition assembly includes a guide rod linear bearing, a guide rod, a clamping plate, a return spring, a trigger block, an acquisition cylinder, a protective cover, a vibration sensor, an amplitude transformer, and a limiting rod. The guide rod linear bearing passes through the signal hole and has a through hole opposite to the fixing hole. The guide rod slides within the guide rod linear bearing, and both ends of the guide rod sliding out of the guide rod linear bearing are provided with external threads. The trigger block is located inside the housing and has a limiting hole arranged opposite to the through hole. The trigger block has an internal thread hole and is threaded to the external thread at the bottom end of the guide rod. The acquisition cylinder is located outside the housing, and the inner wall of the bottom end of the acquisition cylinder has an internal thread and is threaded to the external thread at the bottom end of the guide rod. The guide rod is threaded at its top; the center hole of the clamping plate is fitted around the bottom of the collection cylinder; the return spring is fitted around the guide rod with one end in contact with the clamping plate and the other end in contact with the linear bearing of the guide rod; the open end of the protective cover is fixed to the top of the collection cylinder by bolts and has a through hole; the vibration sensor is placed inside the collection cylinder; the bottom end of the amplitude transformer is fixed to the vibration sensor by fixing bolts and its top end protrudes through the through hole; the limiting rod is sequentially fixed through the fixing hole and the through hole and slides into the limiting hole to limit the rotation of the trigger block; the control mechanism is fixed to the housing and electrically connected to the vibration sensor.

[0010] The beneficial effects of this utility model are: it improves the structure of the existing self-triggering porcelain post insulator vibration detection device, by using the limiting rod to be sequentially fixed in the fixed hole and the through hole and slidably inserted into the limiting hole, which can limit the sliding of the trigger block and improve the structural stability and measurement accuracy of the self-triggering porcelain post insulator vibration detection device.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the signal acquisition component also includes an upper buffer sealing ring and a lower buffer sealing ring. The upper buffer sealing ring is fitted in the gap between the amplitude transformer and the protective cover; the lower buffer sealing ring is fitted in the gap between the amplitude transformer and the acquisition cylinder.

[0013] The further beneficial effect of adopting the above is that by using the upper buffer sealing ring in the gap between the amplitude transformer and the protective cover, and the lower buffer sealing ring in the gap between the amplitude transformer and the acquisition tube, the impact of the instrument's own vibration on signal acquisition can be reduced.

[0014] Furthermore, the signal acquisition component also includes a magnetic ring, which is sleeved on the fixing bolt and magnetically attracted to the amplitude transformer and the vibration sensor.

[0015] The further beneficial effect of adopting the above is that by using magnetic rings sleeved on the outside of the fixing bolts and magnetically adsorbed to the amplitude transformer and vibration sensor, the connection between the vibration sensor and the amplitude transformer can be prevented from becoming loose.

[0016] Furthermore, the signal acquisition component also includes a locking nut, which is threadedly connected to the bottom end of the trigger block as the guide rod is helically screwed out.

[0017] Furthermore, it also includes a self-triggering pulse excitation component, wherein the top surface of the housing is provided with a pulse hole; The self-triggering pulse excitation assembly includes a hammer rod linear bearing, a sleeve, a hammer rod, a hammer head, a lower chuck, an upper chuck, a storage spring, and a pulley triggering structure. The hammer rod linear bearing is fixed inside the pulse hole. The sleeve is located inside the housing, with its top end fixed and connected to the bottom end of the hammer rod linear bearing. The hammer rod slides within the hammer rod linear bearing and the sleeve, and its rod wall has multiple axially spaced grooves. The hammer head's handle end is fixed to the top end of the hammer rod. The center hole of the lower chuck is fitted around the outer periphery of the hammer rod linear bearing. The center hole of the upper chuck is fitted around the outer periphery of the hammer rod corresponding to the area above the hammer rod linear bearing. The storage spring is sleeved outside the hammer rod, with its bottom end fixed to the lower chuck and its top end fixed to the upper chuck. The trigger block's side corresponding to the sleeve is an inclined surface that gradually moves away from the sleeve from top to bottom. The pulley triggering structure includes a fixed frame, a sliding frame, a compression spring, a trigger push rod, and a trigger wheel. The fixed frame is fitted outside the sleeve and has a through hole in its middle, with a push rod hole near the side of the trigger block. The hammer rod slides through the through hole. The sliding frame slides within the fixed frame along a direction perpendicular to the sliding direction of the hammer rod, and an arc-shaped protrusion that can be engaged in the slot is fixed on the inner frame wall corresponding to the hammer rod. One end of the compression spring is fixed to the inner frame wall of the fixed frame away from the trigger block, and the other end is fixed to the outer frame wall of the sliding frame away from the trigger block. One end of the trigger push rod is fixed to the outer frame wall of the sliding frame near the trigger block, and the other end slides through the push rod hole. The trigger wheel is rotatably connected to the other end of the trigger push rod that extends out of the push rod hole and is rolled on the inclined surface to push the arc-shaped protrusion out of the slot, releasing the hammer head to impact the porcelain post insulator to be measured.

[0018] The further beneficial effects of adopting the above are: 1. First, insert the fixed arc protrusion on the inner wall of the sliding frame into the slot of the hammer rod. Then, place the amplitude transformer rod against the porcelain post insulator to be tested. As the amplitude transformer rod drives the trigger block to continue to descend, the trigger wheel slides on the inclined surface of the trigger block, which will push the arc protrusion out of the slot. At this time, the hammer rod and hammer head impact upwards and strike the porcelain post insulator. This can replace the traditional sliding method of the slider and trigger block, reduce the sliding wear between the trigger wheel and the trigger block, and extend the service life.

[0019] 2. Multiple slots are provided along the axial direction of the hammer rod, which can be set with multiple impact levels, improving the practicality of the multi-level self-triggered porcelain post insulator vibration detection device; 3. By fixing the two ends of the energy storage spring to the upper and lower chucks respectively, the hammer rod and hammer head can be charged for impact. After the impact, the hammer rod and hammer head can be pulled back, replacing the existing return spring and simplifying the structure.

[0020] Furthermore, the self-triggering pulse excitation assembly also includes a guide slide rod, and the fixed frame is provided with guide rod holes on the side away from the trigger block; one end of the guide slide rod is fixed to the outer frame wall of the sliding frame away from the trigger block, and the other end slides through the guide rod hole.

[0021] The further beneficial effect of adopting the above is that by fixing one end of the guide rod to the outer frame wall of the sliding frame and sliding the other end through the guide rod hole, the smoothness of the sliding frame can be improved.

[0022] Furthermore, the self-triggering pulse excitation assembly also includes a guide bolt, and the hammer rod has a guide groove arranged axially on its rod wall; the guide bolt is fixed to the inner wall of the sleeve and slides in the guide groove.

[0023] The further beneficial effect of adopting the above is that by using the guide bolt fixed on the inner wall of the sleeve to slide in the guide groove, the smoothness of the hammer rod sliding can be improved.

[0024] Furthermore, the self-triggering pulse excitation assembly also includes a stress dispersion disk, the central hole of which is fitted onto the outer periphery of the hammer rod corresponding to the upper chuck.

[0025] Furthermore, the control mechanism includes a controller, an indicator light, an antenna, and a switch button. The housing has a USB flash drive hole, an SD card slot, and a charging port. The controller is fixed inside the housing, with its USB flash drive slot extending out of the USB flash drive hole, its SD card slot extending out of the SD card hole, and its charging port extending out of the charging port. The indicator light, the antenna, and the switch button are all fixed outside the housing. The controller is electrically connected to the indicator light, the antenna, and the switch button, respectively.

[0026] The further beneficial effect of adopting the above is that by electrically connecting the controller to the antenna and the vibration sensor respectively, the detection data can be transmitted to a remote terminal. Attached Figure Description

[0027] Figure 1 This is a front view structural diagram of a multi-stage self-triggered porcelain post insulator vibration detection device according to the present invention; Figure 2 This is a three-dimensional structural diagram of a multi-stage self-triggered porcelain post insulator vibration detection device according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a multi-stage self-triggered porcelain post insulator vibration detection device according to the present invention; Figure 4 This is a schematic diagram of the internal structure of the signal acquisition component at angle 1 in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 5 This is a schematic diagram of the internal structure of the signal acquisition component at angle 2 in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 6 This is a schematic diagram of the internal structure of the self-triggering pulse excitation component in a multi-stage self-triggering porcelain post insulator vibration detection device of this utility model; Figure 7 This is a schematic diagram of the self-triggering pulse excitation component in a multi-stage self-triggering porcelain post insulator vibration detection device of this utility model; Figure 8 This is a schematic diagram of the hammer rod angle 1 in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 9This is a schematic diagram of the hammer rod angle 2 in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 10 This is a schematic diagram of the internal structure of the pulley triggering structure in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 11 This is a schematic diagram of the separate sampling method in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model; Figure 12 This is a schematic diagram of the self-excitation sampling and detection of a multi-stage self-triggered porcelain post insulator vibration detection device according to this utility model; Figure 13 This is a schematic diagram of the fault spectrum of the lower flange of an insulator detected by a multi-stage self-triggered porcelain post insulator vibration detection device according to this utility model. Figure 14 This is a schematic diagram of the normal spectrum of an insulator in a multi-stage self-triggered porcelain post insulator vibration detection device according to this utility model; Figure 15 This is a schematic diagram of the fault spectrum of the upper flange of the insulator in a multi-stage self-triggered porcelain post insulator vibration detection device of this utility model.

[0028] The attached diagram lists the components represented by each number as follows: 1. Housing; 2. Signal acquisition component; 21. Guide rod linear bearing; 22. Guide rod; 23. Pressure plate; 24. Return spring; 25. Trigger block; 26. Acquisition cylinder; 27. Protective cover; 28. Vibration sensor; 29. ​​Amplitude rod; 210. Limit rod; 211. Upper buffer seal ring; 212. Lower buffer seal ring; 213. Magnetic ring; 214. Locking nut; 3. Control mechanism; 31. Indicator light; 32. Antenna; 33. Switch button; 4. Self-triggering pulse excitation component; 41. Hammer rod linear bearing; 42. Sleeve; 43. Hammer rod; 44. Hammer head; 45. Lower chuck; 46. Upper chuck; 47. Storage spring; 48. Fixing frame; 49. Sliding frame; 410. Pressure spring; 411. Trigger push rod; 412. Trigger wheel. Detailed Implementation

[0029] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0030] like Figure 1 , Figure 4 and Figure 5 As shown, a multi-stage self-triggered porcelain post insulator vibration detection device includes: a housing 1, a signal acquisition component 2, and a control mechanism 3. The top surface of housing 1 is provided with a signal hole and a fixing hole; the signal acquisition assembly 2 includes a guide rod linear bearing 21, a guide rod 22, a clamping plate 23, a return spring 24, a trigger block 25, an acquisition cylinder 26, a protective cover 27, a vibration sensor 28, an amplitude transformer 29, and a limiting rod 210. The guide rod linear bearing 21 is fixed inside the signal hole and has a through hole opposite to the fixing hole; the guide rod 22 slides inside the guide rod linear bearing 21 and has external threads at both ends where it slides out of the guide rod linear bearing 21; the trigger block 25 is located inside housing 1 and has a limiting hole arranged opposite to the through hole, and the trigger block 25 has an internal thread hole that is threaded to the external thread at the bottom end of the guide rod 22; the acquisition cylinder 26 is located outside housing 1, and the bottom end of the acquisition cylinder 26 has an inner cylinder. The wall has an internal thread that is threaded to the top of the guide rod 22; the center hole of the clamping plate 23 is fitted around the bottom of the collection cylinder 26; the return spring 24 is fitted around the guide rod 22, with one end in contact with the clamping plate 23 and the other end in contact with the linear bearing 21 of the guide rod; the open end of the protective cover 27 is fixed to the top of the collection cylinder 26 by bolts and has a through hole; the vibration sensor 28 is placed inside the collection cylinder 26; the bottom end of the amplitude rod 29 is fixed to the vibration sensor 28 by fixing bolts 215 and its top end protrudes through the through hole; the limiting rod 210 is sequentially fixed in the fixing hole and the through hole and slides into the limiting hole to limit the rotation of the trigger block 25; the control mechanism 3 is fixed on the housing 1 and electrically connected to the vibration sensor 28.

[0031] like Figure 1 , Figure 4 and Figure 5 As shown, in some specific embodiments, the signal acquisition component 2 may further include an upper buffer sealing ring 211 and a lower buffer sealing ring 212. The upper buffer sealing ring 211 is fitted in the gap between the amplitude transformer 29 and the protective cover 27; the lower buffer sealing ring 212 is fitted in the gap between the amplitude transformer 29 and the acquisition cylinder 26.

[0032] like Figure 1 , Figure 4 and Figure 5 As shown, in some specific embodiments, the signal acquisition component 2 may also include a magnetic ring 213, which is sleeved on the fixing bolt 215 and magnetically attracted to the amplitude rod 29 and the vibration sensor 28.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, in some specific embodiments, the signal acquisition component 2 also includes a locking nut 214, which is threadedly connected to the bottom end of the trigger block 25 that is spirally screwed out from the guide rod 22.

[0034] like Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, in some specific embodiments, a self-triggering pulse excitation component 4 may also be included, and a pulse hole is provided on the top surface of the housing 1; The self-triggering pulse excitation assembly 4 includes a hammer rod linear bearing 41, a sleeve 42, a hammer rod 43, a hammer head 44, a lower chuck 45, an upper chuck 46, a storage spring 47, and a pulley triggering structure. The hammer rod linear bearing 41 is fixed inside the pulse hole; the sleeve 42 is located inside the housing 1, and its top end is fixed and connected to the bottom end of the hammer rod linear bearing 41; the hammer rod 43 slides within the hammer rod linear bearing 41 and the sleeve 42, and its rod wall is provided with multiple axially spaced grooves 4. 31; The hammer handle end of the hammer head 44 is fixed to the top of the hammer rod 43; The center hole of the lower chuck 45 is fitted onto the outer periphery of the hammer rod linear bearing 41; The center hole of the upper chuck 46 is fitted onto the outer periphery of the hammer rod 43 above the corresponding hammer rod linear bearing 41; The energy storage spring 47 is sleeved on the outside of the hammer rod 43 and its bottom end is fixed on the lower chuck 45, and its top end is fixed on the upper chuck 46; The side of the trigger block 25 corresponding to the sleeve 42 is an inclined surface that moves away from the sleeve 42 from top to bottom. The pulley triggering structure includes a fixed frame 48, a sliding frame 49, a compression spring 410, a trigger push rod 411, and a trigger wheel 412. The fixed frame 48 is fitted onto the sleeve 42 and has a through hole in its middle. A push rod hole is provided on its side near the trigger block 25. The hammer rod 43 slides through the through hole. The sliding frame 49 slides within the fixed frame 48 along the direction perpendicular to the sliding of the hammer rod 43, and an arc-shaped protrusion is fixed on its inner frame wall corresponding to the hammer rod 43, which can be inserted into a slot 431. The compression spring 410... One end of the trigger push rod 411 is fixed to the inner frame wall of the fixed frame 48 away from the trigger block 25, and the other end is fixed to the outer frame wall of the sliding frame 49 away from the trigger block 25; one end of the trigger push rod 411 is fixed to the outer frame wall of the sliding frame 49 near the trigger block 25, and the other end slides through the push rod hole; the trigger wheel 412 is rotatably connected to the other end of the trigger push rod 411 that passes through the push rod hole and is rolled on the inclined surface to push the arc protrusion out of the slot 431 and release the hammer head 44 to impact the porcelain post insulator to be measured upward.

[0035] like Figure 10 As shown, in some specific embodiments, the self-triggering pulse excitation component 4 may also include a guide slide rod 413, and the fixed frame 48 is provided with guide rod holes on the side away from the trigger block 25; one end of the guide slide rod 413 is fixed to the outer frame wall of the sliding frame 49 away from the trigger block 25 and the other end slides through the guide rod hole.

[0036] like Figure 7As shown, in some specific embodiments, the self-triggering pulse excitation assembly 4 may also include a guide bolt 414, and the rod wall of the hammer rod 43 is provided with a guide groove 432 arranged along the axial direction; the guide bolt 414 is fixed to the inner wall of the sleeve 42 and slides in the guide groove 432.

[0037] like Figure 6 and Figure 7 As shown, in some specific embodiments, the self-triggered pulse excitation component 4 further includes a stress dispersion disk 415, the central hole of which is fitted onto the outer periphery of the hammer rod 43 corresponding to the chuck 46.

[0038] like Figure 1 As shown, in some specific embodiments, the control mechanism 3 includes a controller, an indicator light 31, an antenna 32, and a switch button 33. The housing 1 is provided with a USB flash drive hole, an SD card hole, and a charging hole. The controller is fixed inside the housing 1, with its USB flash drive slot 431 extending out of the USB flash drive hole, its SD card slot 431 extending out of the SD card hole, and its charging port extending out of the charging hole. The indicator light 31, the antenna 32, and the switch button 33 are all fixed outside the housing 1. The controller is electrically connected to the indicator light 31, the antenna 32, and the switch button 33 respectively.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A multi-stage self-triggered porcelain post insulator vibration detection device, characterized in that, include: The housing (1) has a signal hole and a fixing hole on its top surface; The signal acquisition component (2) includes a guide rod linear bearing (21), a guide rod (22), a clamping plate (23), a return spring (24), a trigger block (25), an acquisition cylinder (26), a protective cover (27), a vibration sensor (28), an amplitude transformer (29), and a limiting rod (210). The guide rod linear bearing (21) is fixed inside the signal hole and has a through hole opposite to the fixed hole. The guide rod (22) slides inside the guide rod linear bearing (21) and both ends of the guide rod linear bearing (21) that slide out of the guide rod linear bearing (21) are provided with external threads. The trigger block (25) is located inside the housing (1) and has a limiting hole arranged opposite to the through hole. The trigger block (25) has an internal thread hole and is threaded to the bottom of the guide rod (22). The acquisition cylinder (26) is located outside the housing (1). The bottom inner wall of the collection cylinder (26) is provided with an internal thread and is threaded to the top external thread of the guide rod (22); the center hole of the clamping plate (23) is fitted outside the bottom of the collection cylinder (26); the reset spring (24) is fitted outside the guide rod (22) and one end of it is in contact with the clamping plate (23), and the other end of it is in contact with the linear bearing (21) of the guide rod; the open end of the protective cover (27) is fixed to the top of the collection cylinder (26) by bolts and has a through hole; the vibration sensor (28) is placed inside the collection cylinder (26); the bottom end of the amplitude rod (29) is fixed to the vibration sensor (28) by fixing bolts (215) and its top end passes through the through hole; the limiting rod (210) is sequentially fixed in the fixing hole and the through hole and slides into the limiting hole to limit the rotation of the trigger block (25); The control mechanism (3) is fixed on the housing (1) and electrically connected to the vibration sensor (28).

2. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 1, characterized in that, The signal acquisition component (2) further includes an upper buffer sealing ring (211) and a lower buffer sealing ring (212). The upper buffer sealing ring (211) is fitted in the gap between the amplitude transformer (29) and the protective cover (27); the lower buffer sealing ring (212) is fitted in the gap between the amplitude transformer (29) and the acquisition cylinder (26).

3. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 1, characterized in that, The signal acquisition component (2) also includes a magnetic ring (213), which is sleeved on the fixing bolt (215) and magnetically attracted to the amplitude rod (29) and the vibration sensor (28).

4. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 1, characterized in that, The signal acquisition component (2) also includes a locking nut (214), which is threadedly connected to the bottom end of the trigger block (25) as the guide rod (22) is spirally screwed out.

5. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 1, characterized in that, It also includes a self-triggering pulse excitation component (4), and the top surface of the housing (1) is provided with a pulse hole; The self-triggering pulse excitation assembly (4) includes a hammer rod linear bearing (41), a sleeve (42), a hammer rod (43), a hammer head (44), a lower chuck (45), an upper chuck (46), a power storage spring (47), and a pulley triggering structure. The hammer rod linear bearing (41) is fixed inside the pulse hole. The sleeve (42) is located inside the housing (1) and its top end is fixed and connected to the bottom end of the hammer rod linear bearing (41). The hammer rod (43) slides inside the hammer rod linear bearing (41) and the sleeve (42) and its rod wall is provided with a plurality of axially spaced grooves (431). The hammer handle end of the hammer head (44) is fixed to the top of the hammer rod (43); the center hole of the lower chuck (45) is fitted onto the outer periphery of the hammer rod linear bearing (41); the center hole of the upper chuck (46) is fitted onto the outer periphery of the hammer rod (43) above the hammer rod linear bearing (41); the energy storage spring (47) is fitted onto the outside of the hammer rod (43) and its bottom end is fixed on the lower chuck (45), and its top end is fixed on the upper chuck (46); the side of the trigger block (25) corresponding to the sleeve (42) is an inclined surface that moves away from the sleeve (42) from top to bottom; The pulley triggering structure includes a fixed frame (48), a sliding frame (49), a compression spring (410), a trigger push rod (411), and a trigger wheel (412). The fixed frame (48) is fitted outside the sleeve (42) and has a through hole in its middle. It has a push rod hole near the side of the trigger block (25). The hammer rod (43) slides through the through hole. The sliding frame (49) slides inside the fixed frame (48) along the outer periphery of the hammer rod (43) perpendicular to the sliding direction of the hammer rod (43), and has an arc protrusion on its inner frame wall corresponding to the hammer rod (43) that can be inserted into the slot (431). The compression spring (410) One end of the trigger push rod (410) is fixed to the inner frame wall of the fixed frame (48) away from the trigger block (25), and the other end is fixed to the outer frame wall of the sliding frame (49) away from the trigger block (25); one end of the trigger push rod (411) is fixed to the outer frame wall of the sliding frame (49) near the trigger block (25), and the other end slides through the push rod hole; the trigger wheel (412) is rotatably connected to the other end of the trigger push rod (411) that passes through the push rod hole and is rolled on the inclined surface to push the arc protrusion out of the slot (431) and release the hammer head (44) to impact the porcelain post insulator to be measured upward.

6. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 5, characterized in that, The self-triggering pulse excitation assembly (4) also includes a guide slide rod (413). The fixed frame (48) is provided with guide rod holes on the side away from the trigger block (25). One end of the guide slide rod (413) is fixed to the outer frame wall of the sliding frame (49) away from the trigger block (25), and the other end slides through the guide rod hole.

7. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 5, characterized in that, The self-triggering pulse excitation assembly (4) also includes a guide bolt (414), and the hammer rod (43) has a guide groove (432) arranged axially on its rod wall; the guide bolt (414) is fixed to the inner wall of the sleeve (42) and slides in the guide groove (432).

8. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 5, characterized in that, The self-triggering pulse excitation assembly (4) also includes a stress dispersion disk (415), the center hole of which is fitted onto the outer periphery of the hammer rod (43) above the upper chuck (46).

9. The multi-stage self-triggered porcelain post insulator vibration detection device according to claim 1, characterized in that, The control mechanism (3) includes a controller, an indicator light (31), an antenna (32), and a switch button (33). The housing (1) is provided with a USB flash drive hole, an SD card hole, and a charging hole. The controller is fixed inside the housing (1) and its USB flash drive slot (431) extends out of the USB flash drive hole, its SD card slot (431) extends out of the SD card hole, and its charging port extends out of the charging hole. The indicator light (31), the antenna (32), and the switch button (33) are all fixed outside the housing (1). The controller is electrically connected to the indicator light (31), the antenna (32), and the switch button (33) respectively.

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