A partial discharge on-line monitoring device

Abstract

The utility model discloses a partial discharge on -line monitoring device, including monitoring box, bottom plate, movable support arm, fixed support arm and mounting seat, monitoring box both sides are equipped with pivot, and the outer peripheral tooth -like groove is cooperated with locking screw and realizes the graduation lock solid, and the movable support arm slips in the guide rail, and the quick up box of one -sided insertion and the other side of the tight -fitting of cooperation is formed in the left -hand end of the top -tight mechanism of bottom plate, and the bottom plate is connected with the support shaft on the mounting seat through the mounting hole and rotates horizontally, and the radial tight -fitting of adjusting screw realizes the locking to the direction, and the baffle provides the axial location, and the device supports the ground, the side wall and the suspension installation, completes vertical posture correction and independent orientation adjustment, improves the multi -environment adaptability, the installation efficiency and the operation stability, is suitable for the partial discharge on -line monitoring of transformer, switch cabinet, bus duct and other electrical equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of discharge monitoring equipment, specifically relating to an online partial discharge monitoring device. Background Technology

[0002] Partial discharge (PD) is one of the important characteristics of early degradation of high-voltage insulation. To avoid the impact on the power grid caused by outage testing, online monitoring is widely used in engineering to collect and analyze discharge characteristics while the equipment is in operation. Online monitoring devices typically include a monitoring enclosure, mounting supports, and fasteners. Their installation location is close to the equipment under test, and they must meet the reliability requirements for long-term indoor and outdoor operation while also considering the ergonomics of commissioning, inspection, and maintenance.

[0003] Existing online monitoring devices are primarily installed on-site using steel brackets, wall-mounted supports, or simple hoisting components in engineering applications. However, due to significant differences in site conditions, equipment layout, and maintenance access, the mounting surface of the monitoring unit may be located on the ground, the side wall of the equipment, or a suspended position within the building structure. Furthermore, after the unit is fixed, its orientation and position require secondary adjustments based on the inspection line of sight and the location of maintenance interfaces. Practice shows that existing installation structures generally suffer from the following mismatches with site requirements, resulting in insufficient deployment efficiency and ease of use: (1) Insufficient adaptability to multiple environments: Common brackets are mostly single installation forms (only ground columns or only wall-mounted brackets). When it is necessary to suspend the equipment on the side or at the beam or column position, it is often necessary to change the bracket type or make secondary modifications, which increases the amount of construction and the time occupied by the power outage window. In narrow gaps or irregular installation surfaces, it is difficult for the box to be aligned smoothly and reliably installed.

[0004] (2) The contradiction between quick positioning and reliable locking: Many solutions adopt single-point hinge or single-sided cantilever clamping structure. During the positioning process of the upper box, multiple people need to cooperate to lift and temporarily add pads for alignment, and then use multiple sets of fasteners to tighten one by one. The steps are cumbersome and the alignment accuracy is greatly affected by human factors. If fine adjustment is needed after the initial fixation is completed, it is often necessary to partially disassemble and reassemble, which reduces efficiency and increases the risk of falling and scratching the surface of the equipment.

[0005] (3) Inconvenient adjustment of posture and orientation: The monitoring box often has only one or two degrees of freedom to adjust in terms of verticality, rotation angle and front orientation. Moreover, the adjustment and locking mechanisms are not decoupled, which easily leads to situations where "adjusting the orientation leads to loosening" and "locking leads to displacement". After the fixing is completed, if the inspection direction changes (for example, it is necessary to face the corridor or the maintenance surface), it is often impossible to quickly turn the box without loosening the main fixing parts, which brings inconvenience to daily inspection and interface maintenance. Utility Model Content

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide an online partial discharge monitoring device that can be universally installed in various environments such as ground fixation, equipment side fixation, or building suspension. It can also quickly achieve vertical positioning, reliable locking, and independent fine-tuning of the orientation after the device is installed in the enclosure.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A partial discharge online monitoring device includes a monitoring box with a discharge monitoring device installed inside. A base plate is provided below the monitoring box, and a movable support arm and a fixed support arm are respectively provided on the left and right sides of the monitoring box. The fixed support arm is fixed to the base plate, and the movable support arm is slidably mounted on the base plate. A clamping mechanism is fixed at the left end of the base plate to push the movable support arm to the right. The monitoring box is rotatably connected to the movable support arm and the fixed support arm, and the monitoring box can be adjusted in the vertical direction. A mounting base is provided on the underside of the base plate, and the base plate is horizontally rotatably mounted on the mounting base.

[0008] Furthermore, rotating shafts are fixed on both the left and right sides of the monitoring box, and evenly arranged toothed grooves are opened on the outer side of the rotating shafts.

[0009] Furthermore, both the movable support arm and the fixed support arm have sleeve holes at their upper ends for fitting the rotating shaft, and both the movable support arm and the fixed support arm have locking screws that are tightened onto the rotating shaft on their sides.

[0010] Furthermore, a guide rail is fixed to the upper surface of the base plate near the left end, and the lower end of the movable support arm is slidably mounted on the guide rail.

[0011] Furthermore, a mounting hole is provided at the center of the upper surface of the base plate, and an adjusting screw is installed on the side of the base plate at the position corresponding to the mounting hole.

[0012] Furthermore, a support platform is fixed to the center of the upper surface of the mounting base, and a support shaft is fixed to the upper surface of the support platform. The upper end of the support shaft passes through the mounting hole and is fixed with a retaining edge. After tightening the adjusting screw, the support shaft is radially pressed against the mounting hole to lock the horizontal rotation position of the base plate relative to the mounting base.

[0013] Furthermore, the clamping mechanism includes a fixing block fixed to the left end of the base plate, and a clamping screw that clamps onto the movable support arm is installed on the fixing block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The device features a mounting base beneath the base plate, upon which a support platform and support shaft are arranged, forming a unified installation interface. This allows for selection of installation methods based on site conditions, including ground fixing, equipment sidewall fixing, or suspension from the building structure. The base plate is horizontally rotatable and mounted on the support shaft, enabling the monitoring box to adapt its orientation without altering the foundation fixing method. The movable and fixed support arms form an opposing clamping structure on the base plate, working with guide rails to provide limited lateral micro-movement, achieving alignment compensation in narrow spaces or on irregular installation surfaces. This structure reduces on-site secondary modifications and alignment work, enhances adaptability to different civil engineering conditions and equipment layouts, and addresses the insufficient environmental adaptability of existing devices.

[0015] The device adopts a top box path of inserting on the right side first and tightening on the left side. First, the rotating shaft on one side of the monitoring box is inserted into the sleeve hole of the fixed support arm to complete the benchmark positioning. Then, the tightening mechanism set at the left end of the base plate pushes the movable support arm to move laterally along the guide rail, so that the sleeve hole on the other side and the rotating shaft can be quickly and coaxially fitted. Locking screws are arranged on the sides of the sleeve holes on both sides and engage with the toothed grooves on the outer circumference of the rotating shaft. After the vertical positioning is completed, a composite locking of indexing anti-backwardness and double-sided pressing is formed. This process decouples the "alignment-positioning-locking" steps, reduces the lifting and matching strength and alignment difficulty, and maintains angular stability under vibration and wind load. It solves the problem that it is difficult to achieve both rapid positioning and reliable locking in the existing solution.

[0016] The device provides discrete adjustment of the pitch angle of the monitoring box through a hinged joint formed by a rotating shaft and a sleeve hole. After verticality correction is completed, the horizontal rotational freedom between the base plate and the support shaft is used to achieve independent adjustment of the front orientation. The side-mounted adjusting screw generates radial tightening force at the mounting hole position, increasing the frictional torque between the base plate and the support shaft to lock the orientation. The retaining edge provides axial limit to prevent the base plate from shifting or accidentally dislodging. The above-mentioned two-level, non-interfering adjustment and locking mechanism of pitch and azimuth eliminates the need to loosen the main fixed point for orientation adjustment, and locking will not cause attitude displacement. This improves the ergonomics of inspection readings and interface maintenance, and solves the problem of inconvenient attitude and orientation adjustment of existing devices. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the monitoring box of this utility model; Figure 3 This is a schematic diagram of the base plate of this utility model; Figure 4 This is a schematic diagram of the mounting base of this utility model; Figure 5 This is a schematic diagram of the clamping mechanism of this utility model.

[0018] The attached diagram lists the components represented by each number as follows: 1. Monitoring box; 11. Toothed groove; 12. Rotating shaft; 2. Movable support arm; 3. Tightening mechanism; 31. Fixing block; 32. Tightening screw; 4. Base plate; 41. Guide rail; 42. Mounting hole; 43. Adjusting screw; 5. Mounting base; 51. Support platform; 52. Support shaft; 53. Edge retainer; 6. Fixed support arm; 7. Sleeve hole; 8. Locking screw. Detailed Implementation

[0019] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0020] Example 1: like Figure 1As shown, an online partial discharge monitoring device includes a monitoring box 1 with a discharge monitoring device installed inside. A base plate 4 is provided below the monitoring box 1. Movable support arms 2 and fixed support arms 6 are respectively provided on the left and right sides of the monitoring box 1. The fixed support arms 6 are fixed to the base plate 4, and the movable support arms 2 are slidably mounted on the base plate 4. A clamping mechanism 3 is fixed to the left end of the base plate 4 to press the movable support arms 2 to the right. The monitoring box 1 is rotatably connected to the movable support arms 2 and the fixed support arms 6, and the monitoring box 1 can be adjusted in the vertical direction. The lower side of the base plate 4... A mounting base 5 is provided, and the base plate 4 is horizontally rotatably mounted on the mounting base 5. The discharge monitoring equipment inside the monitoring box 1 is used to collect and analyze the partial discharge signals of the high-voltage electrical equipment under operating conditions. The monitoring box 1 adopts a sealed enclosure to adapt to indoor and outdoor dust and humid conditions. An inspection and maintenance opening is reserved on the front of the monitoring box 1 to meet the inspection line of sight requirements. The movable support arm 2 and the fixed support arm 6 form an opposing mounting position for clamping the rotating shaft 12. The movable support arm 2 achieves a slight lateral movement on the base plate 4 through a guide structure to compensate for alignment errors. The fixed support arm 6 provides stability. The base plate 4 serves as an intermediate load-bearing component between the monitoring box 1 and the mounting base 5. After being locked, the base plate 4 bears the weight of the monitoring box 1 and the external operating torque, and transfers the load to the mounting base 5. The mounting base 5 can be fixed to the ground, equipment side wall, or building structure according to site conditions to meet the installation requirements of various environments. The horizontal rotational fit between the mounting base 5 and the base plate 4 is used to adjust the orientation of the monitoring box 1 without loosening the connection between the monitoring box 1 and the support arm to adapt to different inspection routes. The tightening mechanism 3 is located on the right side of the monitoring box 1, rotating on the shaft 12. After the sleeve hole 7 of the fixed support arm 6 is inserted, a lateral pushing force is provided to make the sleeve hole 7 on the side of the movable support arm 2 quickly connect with the left rotating shaft 12, thereby realizing the quick box-up step of single-sided insertion and other-sided tightening to reduce the difficulty of coordinated operation in high-altitude or narrow spaces; the vertical angle of the monitoring box 1 is adjusted at the rotating shaft 12 to complete the vertical positioning, and then the anti-rotation positioning is formed by the cooperation of the locking screw 8 and the toothed groove 11. Finally, the relative angle between the base plate 4 and the mounting seat 5 is finely adjusted by adjusting the screw 43 so that the front of the monitoring box 1 faces the maintenance channel.

[0021] like Figure 2As shown, rotating shafts 12 are fixed on both the left and right sides of the monitoring box 1. The outer side of the rotating shafts 12 is provided with evenly arranged toothed grooves 11. The rotating shafts 12 serve as the rotational pivot between the monitoring box 1 and the movable support arm 2 and the fixed support arm 6 to provide vertical pitch adjustment freedom. The rotating shafts 12 are made of high-strength corrosion-resistant materials to adapt to long-term outdoor working conditions. The toothed grooves 11 are equidistantly arranged along the circumference of the rotating shafts 12 to form an indexing structure. After the toothed grooves 11 mesh with the pressing surface at the end of the locking screw 8, they form a positive anti-backward effect to prevent the monitoring box 1 from angular drifting under vibration and wind load. The indexing distance of the toothed grooves 11 is used to limit the minimum adjustment step distance to meet the discrete requirements of different equipment installation heights and inspection lines of sight. The two ends of the rotating shafts 12 are fixedly connected to the side walls of the monitoring box 1 to improve the overall bending stiffness and reduce the sway of the device during transportation and use.

[0022] like Figure 3 As shown, both the movable support arm 2 and the fixed support arm 6 have sleeve holes 7 at their upper ends for fitting the rotating shaft 12, and both the movable support arm 2 and the fixed support arm 6 have locking screws 8 installed on their sides to tighten onto the rotating shaft 12; the sleeve holes 7 and the rotating shaft 12 are clearance-fitted to ensure smooth insertion during the mounting process and to form a reliable positioning after locking. The axial length of the sleeve holes 7 is used to provide sufficient guidance to reduce the risk of jamming caused by assembly deviations; the locking screws 8 are used to press the rotating shaft 12 against the side wall of the sleeve holes 7 and form a positioning engagement with the toothed grooves 11 to achieve angular indexing. The locking screws 8 provide continuous axial clamping force after vertical positioning to improve the reliability of anti-loosening; the locking screws 8 on the side of the movable support arm 2 are used for final locking after the lateral pre-tightening of the top clamping mechanism 3 is completed; the locking screws 8 on the side of the fixed support arm 6 are used to form double-sided constraints with the movable support arm 2 to improve vibration resistance; before locking, the movable support arm 2 and the fixed support arm 6 allow the monitoring box 1 to swing slightly around the rotating shaft 12 to optimize verticality; after locking, the locking screws 8 on both sides form multi-point contact with the toothed groove 11 to improve the anti-rotation capability.

[0023] like Figure 3As shown, a guide rail 41 is fixed to the upper surface of the base plate 4 near the left end, and the lower end of the movable support arm 2 is slidably mounted on the guide rail 41. The guide rail 41 is used to limit the linear movement trajectory of the movable support arm 2 in the horizontal direction and restrict the degree of freedom of the movable support arm 2 in the vertical direction and around its own axis to avoid swaying during the alignment process of the upper box. The sliding fit clearance between the guide rail 41 and the movable support arm 2 is controlled by the machining precision to reduce the positioning error caused by the running clearance while ensuring smooth sliding. The effective stroke of the guide rail 41 is used to cover the installation position deviation caused by different equipment dimensions to meet the adaptation requirements of multiple models of electrical equipment. After the movable support arm 2 completes the rightward movement within the guide rail 41, the clamping mechanism 3 provides a continuous lateral preload to ensure that the sleeve hole 7 and the rotating shaft 12 are reliably fitted and to create a stable foundation for the subsequent angular indexing and locking of the locking screw 8.

[0024] like Figure 3 As shown, a mounting hole 42 is provided at the center of the upper surface of the base plate 4, and an adjusting screw 43 is installed on the side of the base plate 4 at a position corresponding to the mounting hole 42. The mounting hole 42 is used to provide a through channel for the support shaft 52, thereby realizing the horizontal rotation installation of the base plate 4 relative to the mounting seat 5. The hole wall of the mounting hole 42 serves as the force-bearing surface of the adjusting screw 43, so that it forms a radial clamping pair with the support shaft 52 when locked. The adjusting screw 43 is used to finely adjust the relative angle between the base plate 4 and the mounting seat 5 after the monitoring box 1 is vertically positioned, so that the front of the monitoring box 1 is accurately facing the inspection and patrol direction. After the adjusting screw 43 is tightened, a radial clamping force is formed at the mounting hole 42 to increase the frictional torque between the base plate 4 and the support shaft 52, thereby realizing orientation locking. The center arrangement of the mounting hole 42 is used to make the center of gravity of the monitoring box 1 as close as possible to the center of rotation, so as to reduce the operating force required for orientation adjustment and improve stability.

[0025] like Figure 4 As shown, a support platform 51 is fixed at the center of the upper surface of the mounting base 5, and a support shaft 52 is fixed on the upper surface of the support platform 51. The upper end of the support shaft 52 passes through the mounting hole 42 and is fixed with a retaining edge 53. The mounting base 5 serves as a basic component for connecting with the ground, equipment sidewall, or building structure to bear the combined load from the base plate 4 and the monitoring box 1. The mounting base 5 adapts to different site conditions through multiple fixing methods to meet the needs of multi-environment installation in the background art. The support platform 51 is used to improve the connection rigidity between the support shaft 52 and the mounting base 5 and to provide a flat mounting surface to reduce the impact of installation errors on horizontal rotation fit. The support shaft 52 serves as the central axis for the horizontal rotation of the base plate 4, providing a low-resistance rotation fulcrum during device orientation adjustment and undertaking the functions of torque transmission and anti-overturning after locking. The retaining edge 53 and the mounting hole 42 of the base plate 4 form an axial limit to prevent the base plate 4 from axially shifting under vibration conditions and to prevent the base plate 4 from accidentally detaching from the support shaft 52 during transportation.

[0026] like Figure 5 As shown, the clamping mechanism 3 includes a fixing block 31 fixed to the left end of the base plate 4, and a clamping screw 32 is installed on the fixing block 31 and clamped onto the movable support arm 2. The fixing block 31 provides a stable mounting base for the clamping screw 32 and transmits the clamping force to the base plate 4 to form a reliable reaction path. The rigid connection between the fixing block 31 and the base plate 4 ensures that the structure does not elastically shift during the clamping process, thereby ensuring the clamping effect. The clamping screw 32 is tightened after the right rotating shaft 12 of the monitoring box 1 is first inserted into the sleeve hole 7 of the fixed support arm 6 to cause the movable support arm 2 to move to the right along the guide rail 41 and make the sleeve hole 7 on the movable support arm 2 accurately coaxially fitted with the left rotating shaft 12. After the clamping screw 32 reaches the set preload, it is used to maintain the lateral position stability of the movable support arm 2 to reduce the rebound generated when the locking screw 8 is tightened. During disassembly and maintenance, the clamping screw 32 is used to quickly release the movable support arm 2 to achieve quick disassembly and reassembly of the monitoring box 1 to meet the requirements of quick positioning and reliable locking in the background art.

[0027] Example 2: See Figures 1-5 This embodiment is applicable to side-wall installation scenarios of high-voltage electrical equipment such as switchgear or busbar trunking; the monitoring box 1 integrates a discharge monitoring device to collect partial discharge signals and perform feature processing when the equipment is energized; the outer surface of the monitoring box 1 is provided with an inspection opening to facilitate inspection, reading and maintenance; the base plate 4 is made of metal load-bearing plate and serves as the intermediate load-bearing component between the monitoring box 1 and the mounting base 5; the movable support arm 2 and the fixed support arm 6 are respectively arranged on the left and right sides of the monitoring box 1 and form a hinge relationship with the rotating shaft 12; the lower end of the movable support arm 2 forms a sliding fit with the guide rail 41 to obtain lateral micro-movement freedom; the fixed support arm 6 is rigidly fixed to the base plate 4 to provide reference side bearing; the outer circle of the rotating shaft 12 on both sides of the monitoring box 1 is evenly provided with toothed grooves 11 to achieve angular indexing positioning. Both the movable support arm 2 and the fixed support arm 6 have sleeve holes 7 at their upper ends and locking screws 8 installed on the sides to press and prevent the rotating shaft 12 from moving backward. The left end of the base plate 4 is provided with a clamping mechanism 3 to provide lateral pre-tightening during the mounting process. The clamping mechanism 3 consists of a fixing block 31 and a clamping screw 32 and is fixed to the left end of the base plate 4. The center of the base plate 4 has a mounting hole 42 and an adjusting screw 43 is provided on the side for fine-tuning and locking of the orientation. The upper surface of the mounting base 5 is fixed with a support platform 51 to provide a flat mounting base. A support shaft 52 is vertically set on the support platform 51 as a horizontal rotation center axis. A retaining edge 53 is set at the upper end of the support shaft 52 to form an axial limit with the base plate 4. The above components together constitute the overall structure of the online monitoring device that is adaptable to multiple environments, easy to position, and has an independently adjustable orientation.

[0028] Position the mounting base 5 at the predetermined position on the side wall of the electrical equipment; securely fix the mounting base 5 with expansion bolts or a welded base plate and adjust the level of the upper surface of the mounting base 5 to ensure that the upper plane of the support platform 51 is level; fix the support platform 51 on the mounting base 5 and firmly connect the support shaft 52 to the support platform 51 by thread or welding; check the parallelism between the axis of the support shaft 52 and the equipment housing to reduce subsequent rotational resistance; deburr and clean the hole wall at the center mounting hole 42 of the base plate 4 to ensure smooth fit with the support shaft 52; confirm on the side of the base plate 4 that the working stroke of the adjusting screw 43 meets the fine adjustment range of the orientation; confirm on the left end of the base plate 4 that the position of the fixing block 31 corresponds to the starting position of the guide rail 41 to ensure that the pushing stroke of the tightening screw 32 can cover the required displacement of the movable support arm 2; apply an appropriate amount of grease to the sliding joint between the movable support arm 2 and the guide rail 41 to reduce friction during the installation process.

[0029] Align the base plate 4 with the mounting hole 42 at the upper end of the support shaft 52 and slowly press the base plate 4 down to the retaining edge 53 of the support shaft 52; confirm that the base plate 4 can rotate smoothly and horizontally around the support shaft 52; align the right side rotating shaft 12 of the monitoring box 1 with the sleeve hole 7 of the fixed support arm 6 and complete the insertion; tighten the locking screw 8 to a slightly pre-tightened state to form a preliminary holding position; operate the tightening screw 32 in the tightening mechanism 3 to push the movable support arm 2 to the right along the guide rail 41; observe the upper sleeve hole 7 of the movable support arm 2 and the monitoring box. 1. Ensure the coaxiality of the left rotating shaft 12 and complete the assembly after achieving coaxiality; continue to tighten the locking screw 8 so that the screw end face presses against the rotating shaft 12 and engages with the toothed groove 11 to achieve indexing and anti-reverse; tighten the locking screws 8 on both sides symmetrically to obtain balanced clamping force and improve vibration resistance; after the locking on both sides is completed, slowly rotate the monitoring box 1 around the rotating shaft 12 to adjust the pitch until the monitoring box 1 is in a vertical state; achieve minimum angle step adjustment according to the indexing of the toothed groove 11 and finally tighten the locking screw 8 to complete the vertical locking.

[0030] After the monitoring box 1 is vertically locked, loosen the adjusting screw 43 to the released state; gently push the base plate 4 with both hands to rotate the base plate 4 horizontally around the support shaft 52 to adjust the front of the monitoring box 1 to face the maintenance passage or inspection corridor; confirm that the front opening of the monitoring box 1 is aligned with the personnel's standing position to facilitate reading and maintenance; tighten the adjusting screw 43 so that the end of the adjusting screw 43 radially abuts against the wall of the mounting hole 42 and forms a friction locking pair with the support shaft 52; repeat the fine adjustment and locking actions until the orientation meets the requirements and reinforce it again to resist vibration and wind load; check the gap between the flange 53 and the base plate 4 to confirm that the axial limit is effective and to prevent the base plate 4 from axially moving under external disturbances; this completes the quick installation, vertical positioning and independent orientation locking of the equipment in the side wall scenario.

[0031] During online operation, the internal discharge monitoring equipment of the monitoring box 1 continuously samples and extracts features without affecting the operation of the tested equipment. The self-weight of the monitoring box 1 and the external force generated by maintenance operations are transmitted to the movable support arm 2 and the fixed support arm 6 via the rotating shaft 12. The sliding pair formed by the movable support arm 2 and the base plate 4 via the guide rail 41 is converted into a restricted support in the locked state to improve the lateral stiffness. The indexing engagement formed by the locking screw 8 and the toothed groove 11 provides anti-rotation capability and prevents the monitoring box 1 from angular drifting under vibration and wind load. The base plate 4 transmits the loads in all directions to the support shaft 52 and then to the equipment side wall foundation via the support platform 51 and the mounting base 5. The radial tightening force formed by the adjusting screw 43 at the mounting hole 42 increases the frictional torque between the base plate 4 and the support shaft 52 to ensure the stability of the orientation during long-term operation. The flange 53 provides axial limit to prevent the base plate 4 from disengaging from the support shaft 52. The overall force path is clear and consistent with the requirements of rapid positioning, reliable locking and independent orientation adjustment proposed in the background technology.

[0032] For routine maintenance, first loosen the adjusting screw 43 to release the friction lock between the base plate 4 and the support shaft 52, and finely adjust the orientation as needed to accommodate the temporary maintenance passage; when the monitoring box 1 needs to be replaced or a deep overhaul is required, first loosen the locking screws 8 on both sides in sequence until they disengage from the anti-reverse engagement of the toothed groove 11; loosen the tightening screw 32 to allow the movable support arm 2 to retract to the left within the guide rail 41 and disengage from the left rotating shaft 12; lift the monitoring box 1 at a small angle around the sleeve hole 7 of the right fixed support arm 6 and exit from the right side. The rotating shaft 12 enables the safe removal of the upper housing; after maintenance or replacement, reassembly is performed in reverse order of "II. Upper housing positioning and vertical locking" and "III. Orientation adjustment and overall machine locking"; after reassembly, the torque of the locking screw 8 and the top screw 32 is checked and the adjusting screw 43 is tightened again to restore the indexing locking and orientation locking state; through the above process, the monitoring box 1 can be quickly disassembled and repositioned without changing the physical installation base point, thereby improving the efficiency and safety of on-site maintenance.

[0033] The working principle of this utility model is as follows: When installing the monitoring box 1, the mounting base 5 can be fixed to the ground, the side of the electrical equipment, or suspended on the building in advance, so as to meet the flexible installation and use of the partial discharge monitoring device in various environments. Then, the rotating shaft 12 on the right side of the monitoring box 1 is inserted into the sleeve hole 7 of the fixed support arm 6. At the same time, the tightening screw 32 is turned to tighten the movable support arm 2 and move it to the right so that the sleeve hole 7 on the movable support arm 2 is fitted onto the rotating shaft 12 on the left side, thus completing the quick installation of the monitoring box 1. After the installation is completed, the monitoring box 1 is rotated to a vertical position, and then the locking screw 8 is turned to lock it. Finally, the base plate 4 is rotated so that the monitoring box 1 is in a direction that is easy to inspect, and then the adjusting screw 43 is tightened to complete the installation and adjustment of the entire partial discharge monitoring device.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A partial discharge online monitoring device, comprising a monitoring box (1) with a discharge monitoring device installed inside, characterized in that: The monitoring box (1) is provided with a base plate (4) at its bottom, and a movable support arm (2) and a fixed support arm (6) are provided on the left and right sides of the monitoring box (1) respectively. The fixed support arm (6) is fixed on the base plate (4), and the movable support arm (2) is slidably mounted on the base plate (4) to the left and right. The left end of the base plate (4) is fixed with a clamping mechanism (3) that clamps the movable support arm (2) to the right. The monitoring box (1) is rotatably connected to the movable support arm (2) and the fixed support arm (6), and the monitoring box (1) can be adjusted in the vertical direction. The base plate (4) is provided with a mounting base (5) on its lower side, and the base plate (4) is provided with a mounting base (5) on its lower side. The base plate (4) is horizontally rotated and mounted on the mounting base (5); a mounting hole (42) is provided at the center of the upper surface of the base plate (4), and an adjusting screw (43) is installed on the side of the base plate (4) at the position corresponding to the mounting hole (42); a support platform (51) is fixed at the center of the upper surface of the mounting base (5), a support shaft (52) is fixed on the upper surface of the support platform (51), and a retaining edge (53) is fixed at the upper end of the support shaft (52) through the mounting hole (42); after the adjusting screw (43) is tightened, it radially presses against the support shaft (52) at the mounting hole (42) to lock the horizontal rotation position of the base plate (4) relative to the mounting base (5).

2. The partial discharge online monitoring device according to claim 1, characterized in that: The monitoring box (1) has rotating shafts (12) fixed on both the left and right sides, and the outer side of the rotating shafts (12) is provided with evenly arranged toothed grooves (11).

3. The partial discharge online monitoring device according to claim 2, characterized in that: The upper ends of the movable support arm (2) and the fixed support arm (6) are provided with sleeve holes (7) for fitting the rotating shaft (12), and the sides of the movable support arm (2) and the fixed support arm (6) are provided with locking screws (8) that are tightened on the rotating shaft (12).

4. The partial discharge online monitoring device according to claim 3, characterized in that: The upper surface of the base plate (4) is fixed with a guide rail (41) near the left end, and the lower end of the movable support arm (2) is slidably mounted on the guide rail (41).

5. The partial discharge online monitoring device according to claim 1, characterized in that: The clamping mechanism (3) includes a fixing block (31) fixed to the left end of the base plate (4), and a clamping screw (32) is installed on the fixing block (31) to clamp onto the movable support arm (2).

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