Large-length submarine cable factory joint partial discharge rapid detection device

Abstract

The invention discloses a large-length submarine cable factory joint partial discharge rapid detection device, which relates to the technical field of detection devices and comprises a detection table, a stabilizing mechanism and a butt joint detection mechanism. According to the invention, through arrangement of the stabilizing mechanism, suckers, an adsorption inner cavity, a sucking pump and a transmission pipe, efficient fitting and stabilizing functions of a large-length submarine cable body are realized, and the device is especially suitable for detection operation of the submarine cable body with high requirements on flexibility or surface coating. The specific working principle is as follows: a plurality of suckers are arranged on the inner side of a mounting plate; an inner cavity of the suction cup is connected to the suction pump through the transmission pipe, after the integrated controller starts the suction pump, air is rapidly pumped out through the transmission pipe, negative pressure is formed in the suction inner cavity, suction force is generated, the suction cup is firmly sucked to the outer wall of the submarine cable body, and the attaching face of the suction cup is made of a flexible material and can well adapt to the arc-shaped surface of the submarine cable body; therefore, the problem of adsorption failure caused by poor contact or local air leakage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of detection devices, and in particular to a rapid detection device for partial discharge of a long-length submarine cable factory joint. Background Art

[0002] As an important component of offshore power transmission and communication, the reliability and safety of submarine cables are crucial to the normal operation of offshore facilities. During the production, transportation and installation of submarine cables, due to their huge structure and complex construction environment, some hidden defects are prone to occur, especially the partial discharge phenomenon at the joints, which often becomes an important factor affecting the long-term stable operation of submarine cables. With the continuous development of partial discharge detection technology, some new detection devices have emerged. Through high-precision sensors and rapid response mechanisms, real-time monitoring of partial discharge at submarine cable joints can be achieved during the production process. In submarine cable manufacturing plants, non-contact detection methods and digital processing modules have been gradually introduced for partial discharge detection at joints. Combined with high-frequency signal acquisition and data discrimination algorithms, the characteristics of partial discharge signals can be quickly identified.

[0003] According to the invention patent with Chinese patent publication number CN119044699A, its name is an automobile parts mold injection molding machine, which is specifically described as including an aluminum foil electrode segment wrapped on the repaired insulating shielding layer of the factory joint, a pressurizing device, a partial discharge detection device and a signal control host; the pressurizing device includes a transformer connected to a high-power power supply and a high-voltage line, the high-voltage line is connected to the aluminum foil electrode segment to achieve pressurization, and the transformer is connected to the signal control host. A long-length submarine cable factory joint partial discharge rapid detection device of the present invention can directly install the partial discharge detection device at the submarine cable factory joint after the outer shielding layer is restored, so as to achieve the purpose of directly detecting the partial discharge amount of the submarine cable factory joint, and detect the unqualified joint process in real time and on-site for easy repair; the testing method of the entire equipment is simple and convenient, and the cost is low.

[0004] However, the existing long-length submarine cable factory joint partial discharge rapid detection device has the following shortcomings: 1. In traditional partial discharge detection devices, the submarine cable body is mostly fixed by mechanical clips, pressure plates or simple brackets. Such structures are often standardized parts with fixed sizes or limited adjustment ranges, which are difficult to flexibly adapt to submarine cables of different diameters, different surface coating materials and different stiffness levels. Especially when facing new submarine cables with high flexibility and multi-layer protective structures on the surface, the phenomenon of loose fixation is more common. During the detection process, once the submarine cable is slightly displaced due to tension release, slight rebound or ground inequality, it may cause a gap or relative sliding between the detection plate and the surface of the submarine cable, which will cause unstable signal coupling and decreased detection sensitivity. In severe cases, it may even cause deviation in detection data, affecting the reliability of the final evaluation results.

[0005] 2. Currently, most partial discharge detection devices rely on forced contact forms such as metal clips and rigid clamps to fix the detection plate or sensor on the submarine cable body. While this hard contact structure provides a certain degree of stability, it also has the risk of exerting excessive local pressure on the object being measured. When the surface of the submarine cable is softer, more elastic or has special coating materials, the rigid fixing structure may cause surface indentations, scratches or even microcracks, thereby affecting the overall structural performance of the submarine cable, especially in the factory inspection stage before it is put into use. This type of irreversible damage may reduce the product qualification rate or increase the subsequent maintenance and processing costs.

[0006] 3. In traditional equipment, most detection boards are rigid structures and their positions cannot be adjusted after installation. It is easy for the initial installation angle error, uneven surface or displacement of the submarine cable body to cause inaccurate detection docking, resulting in incomplete detection signal collection and signal distortion. It may even be necessary to repeatedly rearrange the equipment, wasting time and reducing efficiency.

[0007] Therefore, we propose a rapid detection device for partial discharge at factory joints of long-length submarine cables in order to solve the problems raised above. Summary of the invention

[0008] The purpose of the present invention is to provide a device for rapid detection of partial discharge at factory joints of long-length submarine cables, so as to solve the problems that the submarine cable body is difficult to stably fix in traditional detection, and is prone to sliding or shifting, which affects the detection effect; and the traditional mechanical clamping method has a single structure and is prone to causing compression or scratches on the surface of the submarine cable.

[0009] To achieve the above object, the present invention provides the following technical solutions: a long-length submarine cable factory joint partial discharge rapid detection device, comprising a detection platform, a stabilizing mechanism and a docking detection mechanism, wherein the docking detection mechanism is arranged on the top of the detection platform, the stabilizing mechanism is arranged on one side of the detection platform, and a submarine cable body is placed on the top of the detection platform; A stabilizing mechanism, the stabilizing mechanism comprising a left supporting arm and a right supporting arm, a right supporting arm is provided on one side of the left supporting arm, and the left supporting arm and the right supporting arm are used to clamp two sides of the submarine cable body; The docking detection mechanism comprises a detection plate and a spring rod, wherein the spring rod is fixedly connected to the inner wall of the detection platform, and the free end of the spring rod is fixedly connected to the detection plate.

[0010] Preferably, the stabilizing mechanism also includes a main frame, a connecting arm, a connecting piece, a mounting plate, a suction cup, an adsorption inner cavity, a transmission tube and an integrated controller, the bottom end of the main frame is fixedly connected to the top side of the detection platform, the bottom end of the main frame is fixedly connected to an exhaust pump, and the bottom end of the exhaust pump is connected to an integrated controller.

[0011] Preferably, the bottom ends of the left support arm and the right support arm are respectively fixedly connected to the top end of the main frame, the integrated controller is electrically connected to the air pump, and the output end of the air pump is fixedly connected to a transmission pipe.

[0012] Preferably, the inner sides of the left support arm and the right support arm are provided with adjustment grooves, the outer sides of the adjustment grooves are slidably connected with nuts, the outer sides of the left support arm and the right support arm are provided with connecting arms, and the outer side of each connecting arm is threadedly connected with a locking screw.

[0013] Preferably, one end of each locking screw passes through the adjustment slot and is threadedly connected to the nut, and the top end of each connecting arm is fixedly connected to a mounting plate.

[0014] Preferably, a suction cup is fixedly connected to the top of each mounting plate, an adsorption cavity is opened on the inner side of each suction cup, and an inner wall of each adsorption cavity is fixedly connected to the transmission tube.

[0015] Preferably, a detection device body is connected to the middle of the top of the detection platform, and the inner side of the suction cup is attached to the outer wall of the submarine cable body.

[0016] Preferably, a locking groove is provided at the top of the detection platform and the outer side of the spring rod, a locking pin is provided at the top of the locking groove, the bottom end of the locking pin passes through the two locking grooves in sequence, and a sliding plate is slidably connected to the top of the detection platform.

[0017] Preferably, the bottom end of the sliding plate is fixedly connected to the top end of the detection plate, a trigger rod is fixedly connected to the inner side of the detection plate, and a push-type alarm is provided on one side of the trigger rod.

[0018] Preferably, the outer side of the push-type alarm is fixedly connected to the inner side of the detection platform, and the detection plate is attached to the outer side of the submarine cable body.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention realizes the efficient fitting and stabilizing function of a long-length submarine cable body by setting a stabilizing mechanism, a suction cup, an adsorption inner cavity, an air pump and a transmission tube. The present invention is particularly suitable for detecting submarine cable bodies with high requirements for flexibility or surface coating. The specific working principle is as follows: a plurality of suction cups are arranged on the inner side of a mounting plate, and the inner cavity of the suction cup is connected to the air pump through a transmission tube. When the integrated controller starts the air pump, the air is quickly extracted through the transmission tube, and a negative pressure is formed inside the adsorption inner cavity, generating an adsorption force, and firmly adsorbing the suction cup to the outer wall of the submarine cable body. The fitting surface of the suction cup is made of a flexible material, which can better adapt to the curved surface of the submarine cable body, thereby avoiding the problem of adsorption failure caused by poor contact or local leakage. At the same time, since the adsorption state is uniformly managed by the controller, the controller can judge the state of each suction cup according to the data fed back by the sensor. Whether the adsorption reaches the preset pressure value, if a suction cup has abnormal adsorption, the controller can issue a command to remind the user to recalibrate or repair the system, which greatly improves the automation and intelligence level of the entire detection process. In addition, the adsorption and release of the system are triggered by control signals, without manual plugging or adjustment, avoiding traditional clamping equipment from scratching or indenting the cable sheath during transportation or adjustment. Since the detection device body is also provided in the middle of the detection table, the suction cup can complete the pre-positioning and fitting of the detection area in the initial state, providing a reliable contact basis for subsequent partial discharge detection and ensuring the detection accuracy. In summary, the adsorption structure realizes automatic fitting and rapid release through intelligent control of negative pressure suction, which not only ensures the safety protection of the submarine cable body, but also improves the working efficiency and maintenance convenience of the detection equipment. It is an important structural guarantee for realizing non-destructive online detection of the submarine cable body.

[0020] 2. The present invention provides a stabilizing mechanism, a left support arm and a right support arm for clamping the two sides of the submarine cable body, thereby achieving the fixing and displacement limiting function during the detection of the submarine cable body, and ensuring that the detection plate forms a reliable fitting interface with the surface of the tested joint. In the specific design, a plurality of adjustment slots are provided on the outer sides of the left support arm and the right support arm, and each adjustment slot is mechanically connected to the main frame through a connecting arm and a locking screw. The user can adjust the angle of the connecting arm to a position suitable for the current diameter of the submarine cable body by rotating the locking screw, and then complete the locking through the adjusting slot and the threaded substructure, so that a stable and adjustable clamping channel is formed between the left and right support arms. This adjustment method not only enables the device to adapt to submarine cable bodies of different specifications and diameters, but also improves the versatility and flexibility of the entire detection system. During the clamping process, the two support arms and the main frame jointly construct an adjustable fixed clamping system, which avoids interference with the detection accuracy due to slippage, rolling or deformation of the submarine cable body. At the same time, a connecting piece is arranged on the top of the connecting arm, which is further connected to the mounting plate. The mounting plate is provided with a suction cup device for adsorbing the surface of the submarine cable body. Before the vacuum is turned on, the support arm structure can initially realize the position fixing function; and after the suction cup adsorbs and forms a negative pressure, the fixation of the submarine cable body is further enhanced. Therefore, the structure integrates the dual stabilization mechanisms of mechanical clamping and pneumatic adsorption, which not only improves the stabilization force, but also reduces the risk of crushing injuries caused by a single clamping structure. Overall, the stabilization mechanism is reasonably designed, easy to adjust, has strong adaptability and reuse value, and significantly improves the detection efficiency and operation safety of the submarine cable body.

[0021] 3. The present invention sets a docking detection mechanism at the top of the detection platform, and the docking detection mechanism includes a spring rod and a detection plate. The compressible and rebound characteristics of the spring are used to make the detection plate have a certain flexibility adjustment ability. Specifically, one end of the spring rod is fixedly connected to the inner wall of the detection platform, and the other end is connected to the detection plate. When the detection plate contacts the submarine cable body, a pressing force can be generated under the action of the spring rod, so that the detection plate is close to the surface of the submarine cable body to complete the collection of partial discharge signals or related detection functions. During the working process, the detection plate can adapt to submarine cable bodies with different diameters or slightly irregular surface shapes with the help of the rebound ability of the spring, ensuring that it is evenly applied during fitting, effectively avoiding the uneven outer wall of the submarine cable body or installation errors. In order to solve the problem of detection distortion, compared with the traditional fixed detection plate, the spring support structure is more flexible and responsive during the detection process, avoiding frequent fine-tuning of the detection points by humans, and greatly improving the detection efficiency. At the same time, in order to ensure that the detection plate does not have unexpected slippage or deviation in the working state, the present invention further sets a locking groove and a locking pin structure, which cooperates with the relative sliding relationship between the sliding plate and the spring rod. The detection plate can be fixed at a specified position through the locking pin during the detection or transportation process to prevent equipment damage. In summary, this design scheme not only improves the convenience and adaptability of the detection operation, but also ensures the accuracy of partial discharge detection and the stability of the detection results. It is an efficient and reliable structure suitable for factory long-length submarine cable body detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a main structural stereogram of a device for rapid detection of partial discharge of a long-length submarine cable factory joint according to the present invention; Figure 2 It is a structural schematic diagram of one side of a device for rapid detection of partial discharge at a long-length submarine cable factory joint according to the present invention; Figure 3 The invention provides a long-length submarine cable factory joint partial discharge rapid detection device. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a structural schematic diagram of the main frame portion of a device for rapid partial discharge detection of a long-length submarine cable factory joint according to the present invention; Figure 5 The invention provides a long-length submarine cable factory joint partial discharge rapid detection device Figure 4 Enlarged view of point B in the middle; Figure 6 It is a structural schematic diagram of the adjustment slot part of a long-length submarine cable factory joint partial discharge rapid detection device of the present invention; Figure 7 It is a structural schematic diagram of the suction cup part of a device for rapid detection of partial discharge at a long-length submarine cable factory joint according to the present invention; Figure 8The invention provides a long-length submarine cable factory joint partial discharge rapid detection device Figure 7 Enlarged view of point C in the middle.

[0023] In the figure: 1. test bench; 2. test device body; 3. submarine cable body; 4. stabilizing mechanism; 401. main frame; 402. vacuum pump; 403. suction cup; 404. adsorption inner cavity; 405. transmission tube; 406. left support arm; 407. mounting plate; 408. integrated controller; 409. connecting arm; 410. locking screw; 411. adjustment slot; 412. connecting piece; 413. right support arm; 5. docking test mechanism; 501. sliding plate; 502. locking slot; 503. locking pin; 504. spring rod; 505. trigger rod; 506. push-type alarm; 507. test plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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 creative work are within the scope of protection of the present invention.

[0025] Please see attached Figure 1 - Attachment Figure 8 As shown, the present invention provides a technical solution: a long-length submarine cable factory joint partial discharge rapid detection device, comprising a detection platform 1, a stabilizing mechanism 4 and a docking detection mechanism 5, the docking detection mechanism 5 is arranged on the top of the detection platform 1, the stabilizing mechanism 4 is arranged on one side of the detection platform 1, and a submarine cable body 3 is placed on the top of the detection platform 1; The stabilizing mechanism 4 includes a left supporting arm 406 and a right supporting arm 413 . A right supporting arm 413 is provided on one side of the left supporting arm 406 . The left supporting arm 406 and the right supporting arm 413 are used to clamp the two sides of the submarine cable body 3 .

[0026] Embodiment 1, according to Figure 1-Figure 2 and Figure 4-Figure 8As shown, the stabilizing mechanism 4 also includes a main frame 401, a connecting arm 409, a connecting piece 412, a mounting plate 407, a suction cup 403, an adsorption cavity 404, a transmission tube 405 and an integrated controller 408. The bottom end of the main frame 401 is fixedly connected to one side of the top of the detection platform 1, the bottom end of the main frame 401 is fixedly connected to an air pump 402, the bottom end of the air pump 402 is connected to an integrated controller 408, the bottom ends of the left support arm 406 and the right support arm 413 are respectively fixedly connected to the top of the main frame 401, the integrated controller 408 is electrically connected to the air pump 402, the output end of the air pump 402 is fixedly connected to the transmission tube 405, and the inner sides of the left support arm 406 and the right support arm 413 are both provided with adjustment grooves. 411, a nut is slidably connected to the outer side of the adjustment slot 411, a connecting arm 409 is provided on the outer side of the left support arm 406 and the outer side of the right support arm 413, and each connecting arm 409 is threadedly connected to the outer side of a locking screw 410, one end of each locking screw 410 passes through the adjustment slot 411 and is threadedly connected to the nut, the top of each connecting arm 409 is fixedly connected to a mounting plate 407, the top of each mounting plate 407 is fixedly connected to a suction cup 403, an adsorption cavity 404 is opened on the inner side of each suction cup 403, and the inner wall of each adsorption cavity 404 is fixedly connected to the transmission tube 405, the middle part of the top of the detection platform 1 is connected to the detection device body 2, and the inner side of the suction cup 403 fits the outer wall of the submarine cable body 3.

[0027] The effect achieved by the entire embodiment 1 is as follows: the up and down height and angle adjustment is performed by the connecting arm 409 installed on its outside, which significantly enhances the adaptability of the device to submarine cable bodies 3 of different specifications. At the same time, the connecting arm 409 can realize up and down sliding and positioning on the support arm through the adjustment groove 411, and the locking is completed by the threaded connection between the locking screw 410 and the nut, which improves the convenience of the adjustment process and the stability of the clamping. This structure avoids the problem of specific size restrictions on traditional fixed brackets, so that the device has good versatility and reuse value. Secondly, in terms of stability, this embodiment introduces the vacuum adsorption principle, and is connected to the vacuum pump 402 system through multiple suction cups 403 installed on the mounting plate 407. The vacuum pump 402 forms a negative pressure circuit with the adsorption inner cavity 404 through the transmission tube 405. When the vacuum pump 402 is in working state, the suction can be The disc 403 fits firmly to the surface of the submarine cable body 3. The suction cup 403 is made of flexible material and can fully fit the outer wall of the submarine cable body 3 with different curvatures, avoiding the risk of mechanical damage during the clamping process. At the same time, it also significantly improves the stability during clamping. Cooperating with the integrated controller 408 for automatic control and status monitoring of the vacuum pump 402, the safety, real-time and intelligence of the adsorption work are further guaranteed, and human operation errors are reduced. The design of this embodiment enables the entire stabilizing mechanism 4 to be integrated with the structure of the detection platform 1. The main frame 401 is fixedly connected to the detection platform 1 through the bottom. The overall structure is compact and easy to install, which is convenient for rapid layout and commissioning in the factory assembly line. An installation position for the detection device body 2 is also reserved in the middle of the detection platform 1, which maintains alignment with the submarine cable body 3 after stable adsorption, thereby providing a stable detection basis for the subsequent partial discharge detection module.

[0028] It should be noted that the left support arm 406 and the right support arm 413 are used to clamp the left and right sides of the submarine cable body 3 above the test platform 1 to prevent displacement due to vibration, sliding or self-weight offset during the test process, thereby ensuring that the relative position between the test probe and the joint area of ​​the submarine cable body 3 is constant. At the same time, a connecting arm 409 with adjustable angle and height is provided on the outside of each support arm. The connecting arm 409 cooperates with the locking screw 410 through the adjustment groove 411 to achieve flexible adjustment of the clamping angle and the clamping point position, and can be adapted to submarine cable bodies 3 of different models and diameters, thereby improving the versatility and reusability of the device. In addition, a mounting plate 407 is installed on the top of each connecting arm 409, and a flexible suction cup 403 is provided on the mounting plate 407. The suction cup 403 is connected to the vacuum pump 402 through the transmission tube 405 to form a negative pressure adsorption system. When in use, the vacuum pump 402 is started by the integrated controller 408, and the suction cup 403 is quickly discharged. The air forms a negative pressure, so that its inner wall is firmly attached to the outer wall of the submarine cable body 3, thereby further enhancing the stability of the submarine cable body 3 during the detection process, avoiding problems such as shaking, offset or falling off caused by insufficient physical clamping force or insufficient contact area. The flexible suction cup 403 can also effectively fit different surface shapes to reduce the risk of mechanical damage to the surface of the submarine cable body 3. At the same time, the structural design takes into account the characteristics of easy installation and flexible adjustment. The supporting mechanism is integrated with the detection platform 1 through the main frame 401. The whole system can be quickly deployed on the assembly line operation platform to realize an automated or semi-automated rapid detection process. The "clamping-adsorption-adjustment-detection" process is effectively integrated in a structured integrated manner, which greatly improves the preparation efficiency and detection accuracy before detection, solves the problems of inaccurate positioning, poor structural compatibility, and loose contact of traditional manual clamping, and provides a reliable and popularizable factory-level solution for the partial discharge detection technology of the submarine cable body 3 joint.

[0029] Embodiment 2, according to Figure 1-Figure 3 As shown, the docking detection mechanism 5 includes a detection plate 507 and a spring rod 504, the spring rod 504 is fixedly connected to the inner wall of the detection platform 1, the free end of the spring rod 504 is fixedly connected to the detection plate 507, the top of the detection platform 1 and the outer side of the spring rod 504 are provided with a locking groove 502, the top of the locking groove 502 is provided with a locking pin 503, the bottom end of the locking pin 503 passes through the two locking grooves 502 in sequence, the top of the detection platform 1 is slidably connected with a sliding plate 501, the bottom end of the sliding plate 501 is fixedly connected to the top of the detection plate 507, the inner side of the detection plate 507 is fixedly connected with a trigger rod 505, one side of the trigger rod 505 is provided with a push-type alarm 506, the outer side of the push-type alarm 506 is fixedly connected to the inner side of the detection platform 1, and the detection plate 507 is attached to the outer side of the submarine cable body 3.

[0030] The effect achieved by the entire embodiment 2 is as follows: by setting the spring rod 504 and the detection plate 507, the detection plate 507 has a compressible and movable buffering performance, and can automatically fit and adjust according to the slight changes in the surface of the submarine cable body 3 in actual detection, so as to avoid the problem of insufficient probe contact and increased measurement error due to uneven surface or slight deviation. The detection plate 507 is installed at the bottom end of the sliding plate 501, and the sliding plate 501 can move along the guide rail direction of the detection platform 1 to achieve rapid switching of the detection device between different joint positions, thereby improving the overall detection efficiency. A trigger rod 505 is provided on the inner side of the detection plate 507, which cooperates with the push-type alarm 506 below it to form a detection feedback system. When the detection plate 507 is pushed by an external force (such as contacting an abnormal protrusion or a misplaced joint), causing the trigger rod 505 to activate the push-type alarm 506, the push-type alarm 506 will immediately sound An alarm signal is issued to remind the operator or automatic control system that there is a deviation or possible safety risk in the detection position, thereby realizing the construction of dynamic monitoring and human-machine linkage feedback mechanism. In addition, a double limit device of a locking groove 502 and a locking pin 503 is added to the structure, which is arranged on the outside of the detection table 1 and the spring rod 504 respectively. When the device is transported, carried or not in use, the spring rod 504 and the sliding assembly can be firmly fixed by inserting the locking pin 503 to prevent its free bounce from causing damage to the precision detection device, while also improving the safety and maintainability of the overall mechanism. This design enables the detection mechanism to have multiple advantages such as mechanical flexibility, sensitive response and stable structure, effectively solving the pain points of easy displacement of the probe, easy damage of the device and non-intuitive operation in the traditional detection process, and providing a more intelligent and industrialized supporting detection module for the rapid partial discharge detection of submarine cable joints.

[0031] It should be noted that: specifically, the detection plate 507 is connected to the spring rod 504 through the sliding plate 501, and has a certain elastic displacement capacity. When the docking is inaccurate, the offset of the submarine cable body 3 will force the detection plate 507 to deflect or push inward, thereby driving the trigger rod 505 fixedly connected to its inner side. The trigger rod 505 will directly press the trigger surface of the press-type alarm 506 during the displacement process, so that the alarm is activated and an audible and visual alarm signal is emitted. This signal reminds the operator to recalibrate the relative position of the detection device and the submarine cable body 3 to avoid inaccurate detection results or detection failures due to position deviations. This process realizes real-time monitoring and feedback of docking anomalies, avoids repeated manual observation and verification, improves detection efficiency and safety, and is an intelligent auxiliary calibration mechanism that integrates mechanical sensing and electronically controlled alarms.

[0032] The working principle of the whole equipment is as follows: the submarine cable body 3 is placed in the top center area of ​​the detection platform 1 manually or mechanically. In order to prevent the submarine cable body 3 from rolling, slipping and other phenomena that affect the detection accuracy during the detection process, the stabilizing mechanism 4 starts to play a role at this time. The stabilizing mechanism 4 mainly includes a main frame 401, a left support arm 406, a right support arm 413, a connecting arm 409, a mounting plate 407, a suction cup 403, an air pump 402, a transmission pipe 405, a connecting piece 412, an adjusting slot 411, a locking screw 410 and other components. The user can preliminarily determine the position of the clamping area by adjusting the distance between the left support arm 406 and the right support arm 413 according to the diameter and shape of the submarine cable body 3. The outer side of each support arm Each of the connecting arms 409 is provided with an adjusting groove 411, in which a connecting arm 409 can be slidably installed and fixed by a nut and a locking screw 410. A connecting piece 412 is provided at the top of the connecting arm 409, and the connecting piece 412 is further fixedly connected to the mounting plate 407. A plurality of suction cups 403 are arranged on the inner side of the mounting plate 407. After being clamped in place, the operator starts the vacuum pump 402 on the device, and the vacuum pump 402 is controlled to start working by the integrated controller 408. The working process of the negative pressure vacuum system is as follows: the vacuum pump 402 is connected to the adsorption inner cavity 404 of each suction cup 403 through the transmission pipe 405, and starts to pump air into the suction cup 403 to form a vacuum or negative pressure environment. Since the outer surface of the suction cup 403 is in direct contact with the surface of the submarine cable body 3, in the negative pressure vacuum system, the suction cup 403 is directly connected to the surface of the submarine cable body 3. Under the action of pressure, the suction cup 403 will be tightly attached to the outer wall of the submarine cable body 3 and maintain a stable adsorption state. The suction cup 403 material is a flexible structure, which can fit the submarine cable body 3 of different diameters and curvatures to ensure close contact and no air leakage. In order to ensure the safety and controllability of adsorption, the controller can monitor the adsorption state according to the feedback signal of the sensor or pressure valve. Once it is found that a suction cup 403 is not adsorbed firmly or there is a leakage phenomenon, a prompt can be issued immediately or the air extraction can be automatically stopped for protection. After the adsorption is completed stably, the docking detection mechanism 5 provided in the middle of the detection platform 1 starts to intervene in the detection operation. The docking detection mechanism 5 is mainly composed of a spring rod 504, a sliding plate 501, and a detection plate 507. One end of the spring rod 504 is fixedly connected to the inner wall of the detection platform 1, and the other end is fixedly connected to the inner wall of the detection platform 1. One end is freely connected with a detection plate 507, and the detection plate 507 realizes up and down floating and a certain resilience through the sliding plate 501 and the spring rod 504. When the detection plate 507 is in contact with the outer wall of the submarine cable body 3 from the initial state, the spring rod 504 is compressed, thereby forming a restoring force transmitted upward inside it, which can ensure that the detection plate 507 is continuously and stably pressed against the surface of the submarine cable body 3, and avoid damage caused by excessive pressure. At the same time, the contact state of the detection plate 507 can be further fixed by the provided locking pin 503 and the locking groove 502 to avoid displacement due to vibration or accidental contact during the detection process. A trigger rod 505 or a partial discharge probe can be integrated on the inner side of the detection plate 507 to sense the partial discharge signal inside the submarine cable body 3.And transmit the signal to the alarm module or data acquisition system for processing. If necessary, a push-type alarm 506 can be provided on one side of the detection plate 507, which will automatically alarm when an abnormal signal is detected or stable fitting cannot be achieved. In addition, in order to adapt to the detection points and movement needs of different submarine cable bodies 3, the sliding plate 501 structure can slide along the slide rail provided on the detection platform 1 to achieve the position adjustment of the detection plate 507 in the horizontal plane, improve the detection efficiency and the convenience of multi-point detection. When the entire device is working, the adsorption and detection actions are uniformly dispatched by the electronic control system to form a complete closed loop of detection platform 1 positioning - stabilizing mechanism 4 clamping adsorption - detection plate 507 fitting detection. Compared with traditional detection methods, this device does not rely on a large amount of manual adjustment. The structural design can quickly complete the pre-positioning and stable operation of the submarine cable body 3, which is especially suitable for factory assembly line operations with high repeatability and intensive detection. The negative pressure suction cup 403 is combined with the adjustable support arm design, so that the device has good reusability and versatility. Different types of submarine cable bodies 3 can be quickly switched and adapted by adjusting the screw and adsorption strength, which greatly improves the detection efficiency and reduces the operation risk. In summary, this device comprehensively uses the principles of mechanical clamping, pneumatic adsorption and elastic fitting detection, which not only improves the sensitivity and accuracy of partial discharge detection, but also has good operability, safety and reliability in structural design. It is suitable for efficient monitoring and prediction of the quality of the submarine cable body 3 in the fields of power, communication, marine engineering, etc.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for rapid detection of partial discharge at a long-length submarine cable factory joint, comprising a detection platform (1), a stabilizing mechanism (4) and a docking detection mechanism (5), characterized in that: The docking detection mechanism (5) is arranged on the top of the detection platform (1), the stabilizing mechanism (4) is arranged on one side of the detection platform (1), and a submarine cable body (3) is placed on the top of the detection platform (1); A stabilizing mechanism (4), the stabilizing mechanism (4) comprising a left supporting arm (406) and a right supporting arm (413), a right supporting arm (413) being provided on one side of the left supporting arm (406), the left supporting arm (406) and the right supporting arm (413) being used to clamp two sides of the submarine cable body (3); A docking detection mechanism (5), the docking detection mechanism (5) comprising a detection plate (507) and a spring rod (504), the spring rod (504) being fixedly connected to the inner wall of the detection platform (1), and the free end of the spring rod (504) being fixedly connected to the detection plate (507).

2. According to claim 1, a long-length submarine cable factory joint partial discharge rapid detection device is characterized by: The stabilizing mechanism (4) further comprises a main frame (401), a connecting arm (409), a connecting piece (412), a mounting plate (407), a suction cup (403), an adsorption cavity (404), a transmission tube (405) and an integrated controller (408); the bottom end of the main frame (401) is fixedly connected to one side of the top end of the detection platform (1); the bottom end of the main frame (401) is fixedly connected to an air pump (402); and the bottom end of the air pump (402) is connected to an integrated controller (408).

3. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 2, characterized in that: The bottom ends of the left support arm (406) and the right support arm (413) are respectively fixedly connected to the top end of the main frame (401), the integrated controller (408) is electrically connected to the air pump (402), and the output end of the air pump (402) is fixedly connected to the transmission tube (405).

4. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 3, characterized in that: An adjustment slot (411) is provided on the inner side of the left support arm (406) and the right support arm (413), a nut is slidably connected to the outer side of the adjustment slot (411), a connecting arm (409) is provided on the outer side of the left support arm (406) and the outer side of the right support arm (413), and a locking screw (410) is threadedly connected to the outer side of each connecting arm (409).

5. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 4, characterized in that: One end of each locking screw (410) passes through the adjustment slot (411) and is threadedly connected to the nut, and the top end of each connecting arm (409) is fixedly connected to a mounting plate (407).

6. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 5, characterized in that: The top of each mounting plate (407) is fixedly connected to a suction cup (403), the inner side of each suction cup (403) is provided with an adsorption cavity (404), and the inner wall of each adsorption cavity (404) is fixedly connected to the transmission tube (405).

7. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 6, characterized in that: The middle part of the top of the detection platform (1) is connected to a detection device body (2), and the inner side of the suction cup (403) is attached to the outer wall of the submarine cable body (3).

8. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 7, characterized in that: The top of the detection platform (1) and the outer side of the spring rod (504) are both provided with locking grooves (502), the top of the locking groove (502) is provided with a locking pin (503), the bottom end of the locking pin (503) passes through the two locking grooves (502) in sequence, and the top of the detection platform (1) is slidably connected to a sliding plate (501).

9. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 8, characterized in that: The bottom end of the sliding plate (501) is fixedly connected to the top end of the detection plate (507), the inner side of the detection plate (507) is fixedly connected to a trigger rod (505), and a push-type alarm (506) is provided on one side of the trigger rod (505).

10. A long-length submarine cable factory joint partial discharge rapid detection device according to claim 9, characterized in that: The outer side of the push-type alarm (506) is fixedly connected to the inner side of the detection platform (1), and the detection plate (507) is attached to the outer side of the submarine cable body (3).

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