Full-frequency detection device and use method thereof

Abstract

The invention discloses a full-frequency detection device and a use method thereof, and relates to the technical field of power defect detection. The full-frequency detection device comprises a full-frequency detection host, the full-frequency detection host comprises a partial discharge sensor and a control panel, the full-frequency detection host is connected with a primary cover used for protecting the partial discharge sensor, the primary cover is provided with fan equipment, and the fan equipment and an inner cavity of the primary cover are connected with a communicating pipe. A drying filter box and a heater are arranged on the fan equipment, a secondary cover is movably clamped on the primary cover, a telescopic cylinder is movably clamped on the secondary cover, a horn cover is arranged on the telescopic cylinder, and anti-interference plates are arranged on the outer sides of the primary cover, the fan equipment, the secondary cover, the telescopic cylinder and the horn cover. The full-frequency detection device can ensure that the environment temperature and humidity of a detection position are appropriate, the interference of data received by the sensor is small, and the partial discharge defect detection is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of power defect detection, and in particular to a full-frequency detection device and a method for using the same. Background Art

[0002] Non-destructive partial discharge detection of cables is an important means to ensure the safe and stable operation of cables. The equipment used for non-destructive partial discharge detection of cables mainly includes partial discharge sensors, partial discharge detection host and partial discharge detection background.

[0003] In the current detection methods, it is not convenient to directly detect many power equipment cables during detection. Therefore, many full-frequency detection power equipment defect analysis devices use non-contact detection. When local discharge occurs, a series of physical effects will be generated around the discharge point, including: Electromagnetic wave radiation: Local discharge will generate high-frequency electromagnetic waves, which can propagate to the surrounding space. Sound wave propagation: Sound waves are generated during the discharge process, which can propagate through media (such as air, insulating materials, etc.). Therefore, electromagnetic sensors or ultrasonic sensors are used to collect electromagnetic fields or sound waves during cable operation to perform local discharge fault analysis of power equipment. During detection, the host is placed on-site and aligned with the detection position for detection; During the detection process, it is found that although this detection method is more convenient, in the actual data collection process, the data is prone to interference problems, and the error is large in special scenarios. There are two main aspects of interference. First, from the perspective of background noise, the equipment near the collection location point is prone to emit electromagnetic fields and sound waves other than the detection information, which causes data interference in the detection data of the full-frequency detection device. Although the full-frequency detection device has a built-in background denoising algorithm, the algorithm cannot effectively eliminate all noise, resulting in abnormalities in the defect analysis. Second, from the perspective of environmental impact, the sensors of the full-frequency detection device are sensitive to temperature and humidity. Many detection sites are located in locations with low temperature or high humidity. Inappropriate temperature and humidity will affect the measurement accuracy and stability of the full-frequency detection device, thereby affecting the accuracy of cable partial discharge detection. In view of the deficiencies in the prior art, the present invention provides a full-frequency detection device and a method for using the same to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a full-frequency detection device and a method for using the same. First, the full-frequency detection device and steps are improved during use, and a primary cover is added to provide initial protection, and the design of the fan equipment, connecting pipe, drying filter box and heater are coordinated to ensure that the ambient temperature and humidity at the detection position are suitable to avoid affecting the detection sensor. Second, a secondary cover is added. When the detection distance is long, the primary cover, fan equipment, secondary cover, telescopic tube, horn cover and anti-interference plate are used to isolate and preliminarily physically reduce the electromagnetic waves and sound waves outside the detection position. The secondary background software layer noise reduction with its own algorithm is then coordinated to ensure that the sensor receives less interference in the data during defect analysis and detection, and the defect analysis data is accurate and stable.

[0005] To achieve the above object, the present invention is implemented by the following technical solutions: a full-frequency detection device, comprising a full-frequency detection host, the full-frequency detection host comprising a partial discharge sensor and a control panel, the full-frequency detection host being connected to a primary cover for protecting the partial discharge sensor; The primary cover is provided with a fan device, the fan device and the inner cavity of the primary cover are connected by a connecting pipe, and the fan device is provided with a drying filter box and a heater; The primary cover is movably connected with a secondary cover, the secondary cover is movably connected with a telescopic cylinder, and the telescopic cylinder is provided with a horn cover; Anti-interference plates are arranged on the outer sides of the primary cover, the fan equipment, the secondary cover, the telescopic cylinder and the horn cover.

[0006] Preferably, the secondary cover is provided with a plug-in column, the plug-in column is provided with a locking hole, and the primary cover is provided with a locking unit for quickly clamping and locking the plug-in column.

[0007] Preferably, the locking unit includes a limiting sleeve fixedly connected to the side of the primary cover, the plug-in column is movably inserted in the limiting sleeve, the inside of the limiting sleeve is slidably connected with a slider, the slider is provided with a locking rod, the locking rod is movably inserted in the locking hole, and a first spring is provided between the two groups of sliders.

[0008] Preferably, an adjustment unit is provided between the secondary cover and the telescopic cylinder, and the adjustment unit includes a movable platform arranged on the horn cover and a fixed platform fixedly connected to the secondary cover, the movable platform is sleeved on the secondary cover, and a screw rod is rotatably connected between the secondary cover and the fixed platform, and the screw rod is threadedly connected to the movable platform.

[0009] Preferably, a clamping assembly is provided between the movable platform and the speaker cover, and the clamping assembly includes a limiting cylinder arranged on the movable platform and a limiting rod arranged on the speaker cover, the limiting rod is slidably connected inside the limiting cylinder, and a second spring is fixedly connected between the limiting rod and the limiting cylinder.

[0010] Preferably, a lateral support rod for supporting the movable platform is fixedly connected between the secondary cover and the fixed platform.

[0011] Preferably, the anti-interference plate comprises an electromagnetic shielding plate, a honeycomb plate and a decorative plate, and the honeycomb plate is arranged between the electromagnetic shielding plate and the decorative plate.

[0012] Preferably, the primary cover is provided with a bearing bracket for providing support and positioning for the fan equipment.

[0013] Preferably, the partial discharge sensor includes an electromagnetic wave sensor and an ultrasonic wave sensor.

[0014] A second aspect of the present invention provides a method for using a full-frequency detection device, the method comprising the following steps: Step S1: carrying the full-frequency detection device to a target detection cable location; Step S2: assembling a full-frequency detection device according to the detection requirements of the target detection cable; Step S3: adjusting the parameters of the full-frequency detection device so that the detection conditions of the full-frequency detection device reach the optimal detection state; Step S4: keeping the full-frequency detection device in contact with the detection position, and performing defect analysis and detection using the full-frequency detection device; Step S5: After the detection is completed, the result is displayed through the full-frequency detection device; Step S6: Fold the full-frequency detection device to the initial state to end the detection.

[0015] The present invention discloses a full-frequency detection device and a method for using the same, which have the following beneficial effects: 1. The full-frequency detection device, first, improves the full-frequency detection device and steps during use, adds a primary cover to provide initial protection, and cooperates with the design of fan equipment, connecting pipe, drying filter box and heater to ensure that the ambient temperature and humidity of the detection position are suitable to avoid the detection sensor being affected. Second, add a secondary cover. When the detection distance is long, use the primary cover, fan equipment, secondary cover, telescopic tube, horn cover and anti-interference plate to isolate and preliminarily physically reduce the electromagnetic waves and sound waves outside the detection position, and then cooperate with the secondary background software level noise reduction with its own algorithm, so that during the defect analysis and detection process, the sensor receives data with little interference, the defect analysis data is accurate, and the stability is good.

[0016] 2. When the detection distance is short, the full-frequency detection device is used directly for measurement. When the detection distance is long, the secondary cover and the primary cover are connected, and the telescopic tube and horn cover are designed to improve the anti-interference performance between the full-frequency detection device and the cable, thereby improving the full-frequency detection device. The detection effect of partial discharge defects of the cable is improved. The distance between the secondary cover and the telescopic tube is adjustable, so it is convenient to adjust the length between the primary cover and the horn cover to adapt to the detection of various cable distances.

[0017] 3. The full-frequency detection device makes it easy to adjust the position between the secondary cover and the telescopic tube through the design of the adjustment unit, thereby driving the adjustment of the distance between the secondary cover and the horn cover, adapting to partial discharge detection of cables at different distances, improving the shielding effect of the device, and being suitable for use in various scenarios. When adjusting the position between the secondary cover and the telescopic tube, you only need to rotate the screw rod, which is simple and convenient to operate, saving time and effort.

[0018] 4. The full-frequency detection device, through the design of the tightening component, ensures that when the speaker cover is pressed against the detected position of the cable for detection, the fit between the speaker cover and the cable detection position is good, and will not loosen due to hand shaking, thereby ensuring that the device has a good anti-interference effect. When the speaker cover is pressed against the cable detection position, the cable surface exerts pressure on the speaker cover, and the pressure causes the speaker cover to drive the limit rod to move and squeeze the second spring, thereby increasing the elastic potential energy of the second spring. During the subsequent detection process, even if the hand shakes, the second spring will push the limit rod and the speaker cover to move through the stretching effect, thereby ensuring that the speaker cover and the cable remain in a fitted state, thereby improving the anti-interference ability of the full-frequency detection device and improving the detection effect of the full-frequency detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of the full-frequency detection host of the present invention; Figure 2 It is a structural schematic diagram of the primary cover of the present invention; Figure 3 It is a schematic diagram of the installation of the secondary cover of the present invention; Figure 4 is a cross-sectional view of the anti-interference plate of the present invention; Figure 5 It is a disassembly schematic diagram of the primary cover of the present invention; Figure 6It is a structural schematic diagram of the plug-in column of the present invention; Figure 7 It is a structural schematic diagram of the locking unit of the present invention; Figure 8 It is a structural schematic diagram of the regulating unit of the present invention; Fig. 9 It is a structural schematic diagram of the tightening assembly of the present invention.

[0021] In the figure: 1. full-frequency detection host; 11. partial discharge sensor; 12. control panel; 2. primary cover; 21. load-bearing bracket; 3. fan equipment; 31. connecting pipe; 32. drying filter box; 33. heater; 4. secondary cover; 41. plug-in column; 411. locking hole; 5. telescopic cylinder; 6. speaker cover; 7. anti-interference plate; 71. electromagnetic shielding plate; 72. honeycomb plate; 73. decorative plate; 8. locking unit; 81. limit sleeve; 82. slider; 83. locking rod; 84. first spring; 9. adjustment unit; 91. movable table; 92. fixed table; 93. screw rod; 94. lateral support rod; 10. tightening assembly; 1001. limit cylinder; 1002. limit rod; 1003. second spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0023] The embodiments of the present application provide a full-frequency detection device and a method for using the same, thereby solving the problem that although the existing detection method is relatively convenient, the data is easily interfered during the actual data collection process, and the error is relatively large in special scenarios. The equipment near the collection location point is prone to emit electromagnetic fields and sound waves other than the detection information, which causes data interference in the detection data of the full-frequency detection device. The sensors of the full-frequency detection device are sensitive to temperature and humidity. Many detection locations are located in locations with low temperature or high humidity. Inappropriate temperature and humidity will affect the measurement accuracy and stability of the full-frequency detection device, thereby affecting the accuracy of cable partial discharge detection.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The embodiment of the present invention discloses a full-frequency detection device. Figure 1 To Attachment Fig. 9As shown, the full-frequency detection device includes a full-frequency detection host 1, the full-frequency detection host 1 includes a partial discharge sensor 11 and a control panel 12, and the full-frequency detection host 1 is connected to a primary cover 2 for protecting the partial discharge sensor 11; the control panel 12 is used to control the function switching of the full-frequency detection host 1 and the real-time display of data, and the full-frequency detection host 1 is connected to a primary cover 2 for protecting the partial discharge sensor 11; The primary cover 2 is provided with a fan device 3, and a connecting pipe 31 is connected between the fan device 3 and the inner cavity of the primary cover 2. The fan device 3 is provided with a drying filter box 32 and a heater 33; the primary cover 2 is provided with a bearing bracket 21 for providing support and position limitation for the fan device 3. Through the design of the bearing bracket 21, the force of the fan device 3 is stable and the installation is convenient, thereby ensuring the force and support stability of the fan device 3, the drying filter box 32 and the heater 33; A secondary cover 4 is movably connected to the primary cover 2, a telescopic cylinder 5 is movably connected to the secondary cover 4, a horn cover 6 is provided on the telescopic cylinder 5, and anti-interference plates 7 are provided on the outer sides of the primary cover 2, the fan equipment 3, the secondary cover 4, the telescopic cylinder 5 and the horn cover 6.

[0026] The device is designed with a fan device 3, a connecting pipe 31, a drying filter box 32 and a heater 33, so that before the full-frequency detection host 1 and the partial discharge sensor 11 detect the cable detection position, the inside of the primary cover 2 is ventilated by the fan device 3. During the ventilation process, the airflow is dried by the drying filter box 32, and a desiccant is arranged inside the drying filter box 32, and then the temperature is heated by the heater 33, so that the air temperature and dryness inside the primary cover 2 reach the best detection state, thereby ensuring that the partial discharge sensor 11 receives data accurately and the detection accuracy of the full-frequency detection device is guaranteed; A secondary cover 4 is movably connected to the primary cover 2, a telescopic cylinder 5 is movably connected to the secondary cover 4, a horn cover 6 is provided on the telescopic cylinder 5, and anti-interference plates 7 are provided on the outer sides of the primary cover 2, the fan equipment 3, the secondary cover 4, the telescopic cylinder 5 and the horn cover 6; the design of the primary cover 2, the fan equipment 3, the secondary cover 4, the telescopic cylinder 5, the horn cover 6 and the anti-interference plate 7 makes the partial discharge sensor 11 in a controllable and protective environment. When performing detection, the partial discharge sensor 11 is directly connected to the detection position space of the cable to ensure that the interference during the detection process is small.

[0027] When the full-frequency detection device is in use, after the secondary cover 4, telescopic cylinder 5 and horn cover 6 are installed with the primary cover 2, the primary cover 2, the fan device 3, the secondary cover 4, the telescopic cylinder 5 and the horn cover 6 form the same detection space, and the fan device 3, the connecting pipe 31, the drying filter box 32 and the heater 33 can also control the humidity and temperature of this detection space to ensure the stability of the detection conditions, achieve the best detection state, and improve the defect analysis detection effect.

[0028] The secondary cover 4 is provided with a plug-in column 41, and a locking hole 411 is opened on the plug-in column 41. The primary cover 2 is provided with a locking unit 8 for quickly clamping and locking the plug-in column 41. The design of the plug-in column 41 and the locking unit 8 makes it easy to disassemble and assemble the secondary cover 4, so it is convenient to assemble and use according to actual conditions.

[0029] The locking unit 8 includes a limiting sleeve 81 fixedly connected to the side of the primary cover 2, the plug-in column 41 is movably inserted in the limiting sleeve 81, and a slider 82 is slidably connected inside the limiting sleeve 81. The slider 82 is provided with a locking rod 83, and the locking rod 83 is movably inserted in the locking hole 411. A first spring 84 is provided between the two sets of sliders 82. The design of the locking unit 8 makes the primary cover 2 and the secondary cover 4 easy to dock and quick to install. When docking the primary cover 2 and the secondary cover 4, first pull the slider 82 and the locking rod 83 as a whole and squeeze the first spring 84. At this time, align the plug-in column 41 with the interior of the limiting sleeve 81 and insert it. After it is fully inserted, release the slider 82 to allow the first spring 84 to stretch and push the slider 82 and the locking rod 83 to move, and finally allow the locking rod 83 to be inserted into the locking hole 411, thereby achieving quick docking and locking of the primary cover 2 and the secondary cover 4.

[0030] An adjustment unit 9 is provided between the secondary cover 4 and the telescopic cylinder 5. The adjustment unit 9 includes a movable platform 91 provided on the horn cover 6 and a fixed platform 92 fixedly connected to the secondary cover 4. The movable platform 91 is sleeved on the secondary cover 4. A screw rod 93 is rotatably connected between the secondary cover 4 and the fixed platform 92. The screw rod 93 is threadedly connected to the movable platform 91. The device is designed so that the position between the secondary cover 4 and the telescopic cylinder 5 can be easily adjusted, thereby driving the adjustment of the spacing between the secondary cover 4 and the horn cover 6, adapting to various cable partial discharge detection distances, improving the shielding effect of the device, and being suitable for use in various scenarios. When adjusting the position between the secondary cover 4 and the telescopic cylinder 5, it is only necessary to rotate the screw rod 93, which is simple and convenient to operate, saving time and effort; A lateral support rod 94 for supporting the movable platform 91 is fixedly connected between the secondary cover 4 and the fixed platform 92. When the screw rod 93 rotates, the screw rod 93 drives the movable platform 91 to slide along the lateral support rod 94 and the outer wall of the secondary cover 4. The movable platform 91 then drives the horn cover 6 and the telescopic tube 5 to move, so that the distance between the horn cover 6 and the secondary cover 4 changes, which is suitable for cable detection at various distances.

[0031] A pressing assembly 10 is provided between the movable platform 91 and the speaker cover 6. The pressing assembly 10 includes a limiting cylinder 1001 provided on the movable platform 91 and a limiting rod 1002 provided on the speaker cover 6. The limiting rod 1002 is slidably connected inside the limiting cylinder 1001. A second spring 1003 is fixedly connected between the limiting rod 1002 and the limiting cylinder 1001. The device is designed with the pressing assembly 10, so that when the speaker cover 6 is pressed against the detected position of the cable for detection, the speaker cover 6 has a good fit with the cable detection position, and will not be loosened due to hand shaking, thereby ensuring a good anti-interference effect of the device. When the speaker cover 6 is pressed against the cable detection position, the cable surface applies pressure to the speaker cover 6. This pressure causes the speaker cover 6 to drive the limit rod 1002 to move and squeeze the second spring 1003, thereby increasing the elastic potential energy of the second spring 1003. During the subsequent detection process, even if the hand shakes, the second spring 1003 will push the limit rod 1002 and the speaker cover 6 to move through the stretching effect, ensuring that the speaker cover 6 and the cable remain in a fit state, thereby improving the anti-interference ability of the full-frequency detection device and the detection effect of the full-frequency detection device.

[0032] The local discharge sensor 11 includes an electromagnetic wave sensor and an ultrasonic sensor. The anti-interference board 7 includes an electromagnetic shielding board 71, a honeycomb board 72 and a decorative board 73. The honeycomb board 72 is arranged between the electromagnetic shielding board 71 and the decorative board 73. In the device, the electromagnetic shielding board 71 enables the anti-interference board 7 to have an electromagnetic shielding function, so as to prevent the electromagnetic field emitted by the equipment near the cable from affecting the detection result, thereby reducing the noise received by the electromagnetic sensor, and then cooperating with the noise reduction processing algorithm of the full-frequency detection device to perform secondary noise reduction to ensure the accuracy of the received data. The honeycomb board 72 is designed to reduce the environmental noise outside the detection position when the ultrasonic sensor receives data, thereby improving the accuracy of the received signal of the ultrasonic sensor, and cooperating with the noise reduction processing algorithm of the full-frequency detection device to perform secondary noise reduction, so that the information extraction is accurate, and the full-frequency detection device is accurate in detecting the partial discharge of the cable; The device makes the outer side of the anti-interference plate 7 beautiful through the design of the decorative plate 73, and protects the outer side of the anti-interference plate 7 to prevent the internal electromagnetic shielding plate 71 and honeycomb plate 72 from being damaged by collision and affecting the anti-interference performance.

[0033] A second aspect of the present invention provides a method for using a full-frequency detection device, the method comprising the following steps: Step S1: carrying the full-frequency detection device to a target detection cable location; Step S2: assembling a full-frequency detection device according to the detection requirements of the target detection cable; Step S3: adjusting the parameters of the full-frequency detection device so that the detection conditions of the full-frequency detection device reach the optimal detection state; Step S4: keeping the full-frequency detection device in contact with the detection position, and performing defect analysis and detection using the full-frequency detection device; Step S5: After the detection is completed, the result is displayed through the full-frequency detection device; Step S6: Fold the full-frequency detection device to the initial state to end the detection.

[0034] In step S2, the secondary cover 4 is installed as required according to the detection distance. When the detection distance is short, the full-frequency detection device is directly used for measurement. When the detection distance is long, the secondary cover 4 and the primary cover 2 are connected, and the telescopic tube 5 and the horn cover 6 are designed to improve the anti-interference performance between the full-frequency detection device and the cable, thereby improving the full-frequency detection device. The distance between the secondary cover 4 and the telescopic tube 5 is adjustable, so it is convenient to adjust the length between the primary cover 2 and the horn cover 6 to adapt to the detection of various cable distances.

[0035] The method for using the full-frequency detection device of the invention has low interference in the data signal received by the device during operation, thereby ensuring good accuracy of defect analysis and high stability of partial discharge detection.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A full-frequency detection device, comprising a full-frequency detection host (1), characterized in that: The full-frequency detection host (1) comprises a partial discharge sensor (11) and a control panel (12); the full-frequency detection host (1) is connected to a primary cover (2) for protecting the partial discharge sensor (11); The primary cover (2) is provided with a fan device (3), the fan device (3) and the inner cavity of the primary cover (2) are connected by a connecting pipe (31), and the fan device (3) is provided with a drying filter box (32) and a heater (33); The primary cover (2) is movably connected to a secondary cover (4), the secondary cover (4) is movably connected to a telescopic cylinder (5), and the telescopic cylinder (5) is provided with a horn cover (6); Anti-interference plates (7) are provided on the outer sides of the primary cover (2), the fan device (3), the secondary cover (4), the telescopic cylinder (5) and the horn cover (6).

2. The full-frequency detection device according to claim 1, characterized in that: The secondary cover (4) is provided with a plug-in column (41), the plug-in column (41) is provided with a locking hole (411), and the primary cover (2) is provided with a locking unit (8) for quickly locking the plug-in column (41).

3. The full-frequency detection device according to claim 2, characterized in that: The locking unit (8) comprises a limiting sleeve (81) fixedly connected to the side of the primary cover (2), the plug-in column (41) is movably inserted in the limiting sleeve (81), a slider (82) is slidably connected inside the limiting sleeve (81), a locking rod (83) is provided on the slider (82), the locking rod (83) is movably inserted in the locking hole (411), and a first spring (84) is provided between the two groups of sliders (82).

4. The full-frequency detection device according to claim 1, characterized in that: An adjustment unit (9) is provided between the secondary cover (4) and the telescopic cylinder (5), the adjustment unit (9) comprising a movable platform (91) provided on the horn cover (6) and a fixed platform (92) fixedly connected to the secondary cover (4), the movable platform (91) being sleeved on the secondary cover (4), a screw rod (93) being rotatably connected between the secondary cover (4) and the fixed platform (92), the screw rod (93) being threadedly connected to the movable platform (91).

5. The full-frequency detection device according to claim 4, characterized in that: A clamping assembly (10) is provided between the movable platform (91) and the speaker cover (6), the clamping assembly (10) comprising a limiting cylinder (1001) provided on the movable platform (91) and a limiting rod (1002) provided on the speaker cover (6), the limiting rod (1002) being slidably connected inside the limiting cylinder (1001), and a second spring (1003) being fixedly connected between the limiting rod (1002) and the limiting cylinder (1001).

6. The full-frequency detection device according to claim 4, characterized in that: A lateral support rod (94) for supporting the movable platform (91) is fixedly connected between the secondary cover (4) and the fixed platform (92).

7. The full-frequency detection device according to claim 1, characterized in that: The anti-interference plate (7) comprises an electromagnetic shielding plate (71), a honeycomb plate (72) and a decorative plate (73); the honeycomb plate (72) is arranged between the electromagnetic shielding plate (71) and the decorative plate (73).

8. The full-frequency detection device according to claim 1, characterized in that: The primary cover (2) is provided with a bearing bracket (21) for providing support and positioning for the fan equipment (3).

9. The full-frequency detection device according to claim 1, characterized in that: The partial discharge sensor (11) comprises an electromagnetic wave sensor and an ultrasonic wave sensor.

10. The method for using the full-frequency detection device according to any one of claims 1 to 9, characterized in that: The method of use comprises the following steps: Step S1: carrying the full-frequency detection device to the target detection cable position; Step S2: assembling a full-frequency detection device according to the detection requirements of the target detection cable; Step S3: adjusting the parameters of the full-frequency detection device so that the detection conditions of the full-frequency detection device reach the optimal detection state; Step S4: keeping the full-frequency detection device in contact with the detection position, and performing defect analysis and detection using the full-frequency detection device; Step S5: After the detection is completed, the result is displayed through the full-frequency detection device; Step S6: Fold the full-frequency detection device to the initial state to end the detection.

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