Insulation monitoring device for medium-voltage power distribution system of nuclear power plant

Abstract

The utility model relates to the technical field of insulation monitoring, and provides an insulation monitoring device for a medium-voltage power distribution system of a nuclear power plant, which comprises an insulation monitor and a frame used for bearing the insulation monitor, a pop-up mechanism used for pushing out the insulation monitor is mounted on the frame, and a limiting mechanism used for limiting the pop-up of the insulation monitor is mounted on the frame. The rear end of the insulation monitor is provided with a wiring hole, and the frame is provided with a threading hole. The pop-up mechanism comprises sliding rods symmetrically installed on the frame, the sliding rods are connected with push-out pieces in a sliding mode, first springs are installed between the push-out pieces and the sliding rods, and the push-out pieces make contact with the rear portion of the insulation monitor. The push-out member can position the newly installed insulation monitor, thereby improving the installation accuracy and installation efficiency, enabling a maintainer to rapidly dismount the insulation monitor, rapidly completing the maintenance or replacement of the device, reducing the downtime of a medium-voltage power distribution system, and improving the maintenance efficiency of the medium-voltage power distribution system. Therefore, the operation efficiency and the production capacity of the nuclear power plant are maintained to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of insulation monitoring technology, and in particular to an insulation monitoring device for a medium-voltage power distribution system in a nuclear power plant. Background Technology

[0002] Insulation monitoring devices for medium-voltage power distribution systems in nuclear power plants typically consist of sensors, signal transmission lines, display devices, and alarm devices.

[0003] Patent publication number CN219224983U relates to an insulation monitoring device. The device has terminals connected to its outer side, a transmission box fixedly connected to its bottom, and a shield fixedly connected to its top. An auxiliary locking plate is slidably connected inside the shield, and a limit plate is fixedly connected to its bottom. A rotating block is located on the outer side of the transmission box, and a rotating rod is fixedly connected to its inner side. The inner side of the rotating rod extends into the transmission box and is fixedly connected to a first helical gear. A second helical gear meshes with the top of the first helical gear, and a screw is fixedly connected to the top of the second helical gear. The top of the screw is movably connected to the top of the inner wall of the transmission box via a bearing. This patent enhances the stability of the wiring and terminal connections, preventing wiring from easily coming loose or becoming detached during use.

[0004] The aforementioned patent adds functionality to ensure stable wiring and terminal connections, thus preventing wiring from easily coming loose or becoming disconnected during use. However, it is difficult to disassemble the insulation monitor quickly during maintenance. If the insulation monitor cannot be disassembled quickly, it will lead to prolonged downtime of the medium-voltage power distribution system, thereby causing interruption of operational equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an insulation monitoring device for medium-voltage power distribution systems in nuclear power plants.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct an insulation monitoring device for a medium-voltage power distribution system in a nuclear power plant, including an insulation monitor and a frame for mounting the insulation monitor. The frame is equipped with a pop-out mechanism for pushing out the insulation monitor, and a limiting mechanism for restricting the pop-out of the insulation monitor is installed on the frame. The insulation monitor has a wiring hole at its rear end, and the frame has a wire-passing hole.

[0007] The ejection mechanism includes slide rods symmetrically mounted on the frame, with an ejector slidably connected to the slide rod. A first spring is installed between the ejector and the slide rod, and the ejector contacts the rear of the insulation monitor.

[0008] Furthermore, the limiting mechanism includes a support member mounted on the frame, a limiting member slidably connected to the support member, a limiting groove provided on the insulation monitor, the limiting member being inserted into the limiting groove, and a second spring installed between the limiting member and the support member.

[0009] Furthermore, the limiting mechanism also includes a locking assembly for restricting the movement of the limiting member. The locking assembly includes a support plate mounted on the support member and a locking groove opened on the limiting member. A locking rod is slidably connected to the support plate. A locking frame is sleeved on the locking rod. The locking frame is inserted into the locking groove. A third spring is installed between the locking frame and the support plate.

[0010] Furthermore, the bottom end of the limiting member is provided with an inclined surface.

[0011] Furthermore, it also includes a deceleration mechanism installed on the frame to slow down the ejection speed of the insulation monitor. The deceleration mechanism includes a deceleration frame installed inside the frame, a deceleration plate slidably connected inside the deceleration frame, a hook plate installed on the deceleration plate for connecting with the ejector, and a fourth spring installed between the hook plate and the deceleration frame.

[0012] Furthermore, the speed reducer plate has through holes.

[0013] Furthermore, the deceleration frame contains liquid, and the deceleration plate is in contact with the deceleration frame.

[0014] Furthermore, a sealing ring is provided between the deceleration frame and the deceleration plate.

[0015] Furthermore, it also includes a protective mechanism slidably connected to the frame, the protective mechanism including a baffle plate slidably connected to the frame, a stabilizing frame mounted on the bottom of the baffle plate, and a Z-shaped rod mounted on the stabilizing frame for connection with the ejector.

[0016] Furthermore, the protective mechanism also includes a load-bearing frame and a load-bearing plate. The load-bearing frame is installed on the frame, and the load-bearing plate is installed on the load-bearing frame. A protrusion is installed at the bottom of the shield, and a spring is installed at the top of the load-bearing plate. The protrusion is in contact with the spring.

[0017] The following are the beneficial effects of implementing this utility model:

[0018] This application utilizes a limiting mechanism to release the restriction on the insulation monitor. Without the limiting mechanism, the ejector, under the elastic force of the first spring, moves rearward along the slide bar, pushing the insulation monitor forward. The ejector pushes the insulation monitor out of the frame, allowing maintenance personnel to retrieve it from outside the frame for replacement or maintenance. When installing a new insulation monitor, it can be placed at the front exit of the frame. The maintenance personnel then push the monitor rearward, causing it to move the ejector along with it. Once all insulation monitors are installed inside the frame, the maintenance personnel operate the limiting mechanism to lock them securely within the frame. The ejector provides positioning for newly installed insulation monitors, improving installation accuracy and efficiency. This allows maintenance personnel to quickly disassemble the monitors, rapidly completing maintenance or replacement, reducing downtime of the medium-voltage power distribution system, and maximizing the operating efficiency and production capacity of the nuclear power plant. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] In the attached image:

[0021] Figure 1 This is a schematic diagram of the structure of the medium-voltage power distribution system insulation monitoring device of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the frame and pop-out mechanism of this utility model;

[0023] Figure 3 This is the utility model Figure 2 Enlarged structural diagram of section A;

[0024] Figure 4 This is a structural schematic diagram of the support and limiting components of this utility model;

[0025] Figure 5 This is a schematic diagram of the insulation monitoring instrument and wiring hole of this utility model;

[0026] Figure 6 This is the utility model Figure 5 Enlarged structural diagram of section B;

[0027] Figure 7 This is the utility model Figure 5 Enlarged structural diagram of section C;

[0028] Figure 8 This is a structural schematic diagram of the deceleration mechanism of this utility model.

[0029] Explanation of markings in the diagram

[0030] Insulation monitor 1, frame 2, pop-out mechanism 3, slide bar 31, push-out part 32, first spring 33, limiting mechanism 4, support part 41, limiting part 42, limiting groove 43, second spring 44, wiring hole 5, wire hole 6, locking assembly 7, support plate 71, locking groove 72, locking rod 73, locking frame 74, third spring 75, inclined plane 76, deceleration mechanism 8, deceleration frame 81, deceleration plate 82, hook plate 83, fourth spring 84, through hole 85, protective mechanism 9, shielding plate 91, stabilizing frame 92, Z-shaped rod 93, load-bearing frame 94, load-bearing plate 95, protrusion 96, spring piece 97. Detailed Implementation

[0031] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0032] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0033] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0034] Please see Figures 1 to 5 The first embodiment of this utility model provides an insulation monitoring device for a medium-voltage power distribution system in a nuclear power plant, including an insulation monitor 1 and a frame 2 for mounting the insulation monitor 1. The frame 2 is equipped with a pop-out mechanism 3 for pushing out the insulation monitor 1, and a limiting mechanism 4 for restricting the pop-out of the insulation monitor 1. The rear end of the insulation monitor 1 is provided with a wiring hole 5, and the frame 2 is provided with a wire-passing hole 6. The pop-out mechanism 3 includes a slide rod 31 symmetrically mounted on the frame 2, a push-out member 32 slidably connected to the slide rod 31, and a first spring 33 installed between the push-out plate and the slide rod 31.

[0035] The frame 2 is installed above the power distribution system. The frame 2 can protect the insulation monitor 1, prevent the insulation monitor 1 from being damaged during the production process, thereby extending the service life of the insulation monitor 1 and saving maintenance costs.

[0036] When the insulation monitor 1 is installed inside the frame 2, the first spring 33 is in a stretched state. The first spring 33 will always generate a spring force on the push-out part 32 towards the front end. Thus, when the limit mechanism 4 is released, the push-out part 32 will automatically drive the insulation monitor 1 out of the frame 2, thereby reducing the labor intensity of maintenance personnel, making operation more convenient, improving maintenance efficiency, reducing the downtime of the medium-voltage power distribution system, and thus maximizing the operating efficiency and production capacity of the nuclear power plant.

[0037] This application utilizes a pop-out mechanism 3 installed on the frame 2. When maintenance personnel want to remove the insulation monitor 1 from the frame 2, they can reach into the frame 2 through the wiring hole 6 and then pull the connecting wire out from the wiring hole 5 of the insulation monitor 1. Without the obstruction of the connecting wire, the insulation monitor 1 can be moved out or put into the frame 2 more smoothly. This makes it easier for maintenance personnel to install the insulation monitor 1 in the frame 2, saves the length of the connecting wire, reduces installation costs, reduces the difficulty of operation for maintenance personnel, and improves work efficiency. Maintenance personnel then operate the limiting mechanism 4 to release the restriction on the insulation monitor 1. Without the restriction of the limiting mechanism 4, the pusher 32, under the elastic force of the first spring 33, will move rearward along the slide rod 31. The pusher 32 will then push the insulation monitor 1 forward, pushing it out of the frame 2. Maintenance personnel can then retrieve the insulation monitor 1 from outside the frame 2 for replacement or maintenance. When installing a new insulation monitor 1, the maintenance personnel can place it at the front exit of the frame 2. The maintenance personnel then push the insulation monitoring device 1 towards the rear, causing it to move along with the push-out component 32. Once all the insulation monitoring devices 1 are installed inside the frame 2, the maintenance personnel operate the limit mechanism 4 to lock the insulation monitoring devices 1, securing them within the frame 2. The push-out component 32 can position the newly installed insulation monitoring devices 1, improving the accuracy and efficiency of installation. This allows maintenance personnel to quickly disassemble the insulation monitoring devices 1, rapidly complete the repair or replacement of the equipment, reduce downtime of the medium-voltage power distribution system, and thus maximize the operating efficiency and production capacity of the nuclear power plant.

[0038] Please see Figures 1 to 6 In some embodiments, the limiting mechanism 4 includes a support member 41 mounted on the frame 2, a limiting member 42 slidably connected to the support member 41, a limiting groove 43 provided on the insulation monitoring instrument 1, the limiting member 42 being inserted into the limiting groove 43, and a second spring 44 being installed between the limiting member 42 and the support member 41.

[0039] This application utilizes a support member 41 on a frame 2, with a limiting member 42 slidably connected to the support member 41. An insulation monitor 1 has a limiting groove 43, and the limiting member 42 is inserted into the limiting groove 43. A second spring 44 is installed between the limiting member 42 and the support member 41, with its bottom end fixedly connected to the limiting member 42. When maintenance personnel want to unlock the insulation monitor 1, they need to overcome the elastic force generated by the second spring 44 to pull the limiting member 42 upwards, separating it from the limiting groove 43. Without the restriction of the limiting member 42 and the limiting groove 43, the pusher 32, under the action of the first spring 33, will move the insulation monitor 1 out of the frame 2. This reduces the difficulty for maintenance personnel to disassemble the insulation monitor 1, improves maintenance efficiency, and reduces labor intensity. Since maintenance personnel need to exert a certain upward pulling force to separate the limiting member 42 from the limiting groove 43, the stability of the insulation monitor 1 within the frame 2 is improved, reducing the possibility of electrical accidents and enhancing the safety of maintenance personnel and equipment.

[0040] Please see Figures 1 to 6 In some embodiments, the limiting mechanism 4 further includes a locking assembly 7 for limiting the movement of the limiting member 42. The locking assembly 7 includes a support plate 71 mounted on the support member 41 and a locking groove 72 opened on the limiting member 42. A locking rod 73 is slidably connected to the support plate 71. A locking frame 74 is installed on the locking rod 73. The locking frame 74 is slidably connected in the locking groove 72. A third spring 75 is installed between the locking frame 74 and the support plate 71.

[0041] This application utilizes a support plate 71 installed on a support member 41 and a locking groove 72 opened on a limiting member 42. A locking rod 73 is slidably connected to the support plate 71, and a locking frame 74 is installed around the locking rod 73. The locking frame 74 is slidably connected within the locking groove 72, and a third spring 75 is installed between the locking frame 74 and the support plate 71. When maintenance personnel want to release the limiting member 42 from locking the insulation monitoring instrument 1, they need to first pull the locking frame 74 so that the locking frame 74 drives the locking rod 73 to overcome the elastic force generated by the third spring 75 and move away from the limiting member. When one side of component 42 moves, the locking frame 74 and locking rod 73 move out of the locking groove 72. Only then can the operator pull the limiting component 42 upward to release the limiting component 42 from locking the insulation monitor 1. Since the locking frame 74 and locking rod 73 radially lock the limiting component 42 under the action of the third spring 75, it prevents others from accidentally touching the limiting component 42 and affecting the stability of the insulation monitor 1 within the frame 2. This further improves safety, reduces the possibility of electrical accidents, and enhances the safety of maintenance personnel and equipment.

[0042] The locking frame 74 allows maintenance personnel to overcome the elastic force of the third spring 75 to pull the locking rod 73 away from the limiting member 42, thereby separating the locking frame 74 and the locking rod 73 from the locking groove 72, which reduces labor intensity, makes operation more convenient, and improves the stability of the insulation monitor 1 within the frame 2.

[0043] Please see Figures 1 to 4 In some embodiments, the bottom end of the limiting member 42 is provided with an inclined surface 76.

[0044] This application features a slope 76 at the bottom of the limiting member 42. With the end of the limiting member 42 closest to the insulation monitor 1 having the slope 76, when the insulation monitor 1 is installed into the frame 2, the locking frame 74 and locking rod 73 are first moved out of the locking groove 72. Then, the insulation monitor 1 continues to move inwards towards the frame 2. The insulation monitor 1 will initially press against the slope 76 of the limiting member 42. Afterwards, maintenance personnel continue to push the insulation monitor 1, causing it to overcome the elastic force generated by the second spring 44 through the slope 76. When the limiting member 42 is lifted, and the limiting groove 43 on the insulation monitor 1 moves below the limiting member 42, the elastic force generated by the second spring 44 will cause the limiting member 42 to be inserted into the limiting groove 43, locking the insulation monitor 1. Furthermore, by setting the end of the limiting member 42 near the insulation monitor 1 as a slope 76, it is easier for maintenance personnel to install the insulation monitor 1 in the frame 2 for locking. The operation is more labor-saving and convenient, improving maintenance efficiency and further reducing the downtime of the medium-voltage power distribution system, thereby further maintaining the operating efficiency and production capacity of the nuclear power plant.

[0045] Please see Figures 1 to 8 In some embodiments, the medium-voltage power distribution system insulation monitoring device further includes a deceleration mechanism 8 mounted on the frame 2 to slow down the ejection speed of the insulation monitor 1. The deceleration mechanism 8 includes a deceleration frame 81 mounted inside the frame 2. A deceleration plate 82 is slidably connected inside the deceleration frame 81. A hook plate 83 for connecting with the ejector 32 is mounted on the deceleration plate 82. A fourth spring 84 is installed between the hook plate 83 and the deceleration frame 81.

[0046] This application uses a deceleration frame 81 installed inside the frame 2. A deceleration plate 82 is slidably connected inside the deceleration frame 81. A hook plate 83 for connecting with the push-out member 32 is installed on the deceleration plate 82. A fourth spring 84 is installed between the hook plate 83 and the deceleration frame 81. The elastic force of the first spring 33 is greater than that of the fourth spring 84. When the pusher 32 moves away from the interior of the frame 2 under the action of the elastic force of the first spring 33, the pusher 32 will drive the hook plate 83 to move together. The hook plate 83 overcomes the elastic force generated by the fourth spring 84 and moves together towards the front end of the frame 2, which compresses the fourth spring 84 between the hook plate 83 and the deceleration plate 82. The compression of the fourth spring 84 can generate a certain resistance to the movement of the pusher 32. At the same time, the deceleration plate 82 can increase the contact area with the air, forming a certain resistance, further slowing down the release of the first spring 33. Through the cooperation between the hook plate 83, the deceleration plate 82 and the fourth spring 84, a certain resistance is generated when the pusher 32 moves away from the interior of the frame 2, which can delay the release speed of the first spring 33, so that the pusher 32 slowly pushes the insulation monitor 1 away from the interior of the frame 2. Since the insulation monitor 1 contains precision sensors or electronic components, the design to move slowly can protect the precision components from impact or accidental damage during disassembly, extend the life of the insulation monitor 1 and reduce maintenance costs.

[0047] Please see Figures 1 to 8 In some embodiments, the speed reduction plate 82 has a through hole 85.

[0048] This application allows air to pass through the through hole 85 on the speed reducer 82 when the speed reducer 82 moves back and forth, reducing the pressure of air resistance on the speed reducer 82, preventing the speed reducer 82 from deforming after repeated use, thereby extending the service life of the speed reducer 82 and further saving maintenance costs.

[0049] Please see Figures 1 to 8 In some embodiments, the deceleration frame 81 is filled with liquid, and the deceleration plate 82 is in contact with the deceleration frame 81.

[0050] This application utilizes a liquid inside the deceleration frame 81, with the deceleration plate 82 in contact with the deceleration frame 81. Through the surface tension and pressure of the liquid, when the deceleration plate 82 is driven by the hook plate 83 to move inward toward the frame 2, the liquid inside the deceleration frame 81 will block the movement of the deceleration plate 82, creating a certain resistance to the deceleration plate 82. As the deceleration plate 82 moves inward toward the frame 2, the liquid will slowly pass through the through hole 85, further delaying the movement of the push-out part 32. This protects the precision components from impact or accidental damage during disassembly, extends the life of the insulation monitor 1, and reduces maintenance costs.

[0051] Please see Figures 1 to 8In some embodiments, a sealing ring is provided between the deceleration frame 81 and the deceleration plate 82.

[0052] This application reduces the gap between the deceleration frame 81 and the deceleration plate 82 by providing a sealing ring between them. This prevents liquid in the deceleration frame 81 from flowing out from the gap at the edge of the deceleration frame 81 and the deceleration plate 82, allowing the liquid to flow out from the through hole 85. This improves the delaying effect of the deceleration frame 81 and the deceleration plate 82 on the ejector 32. The through hole 85 is located in the lower middle area of ​​the deceleration plate 82. For through holes 85 not located at the edge, when the last part of the liquid passes through the through hole 85, the deceleration plate 82 needs to compress the liquid first, so that the liquid height exceeds the position of the through hole 85 before it can flow out. This ensures that the deceleration plate 82 always maintains the delaying effect on the ejector 32, allowing the ejector 32 to move slowly even in the final stage of ejecting the insulation monitor 1. This further protects the precision components from impact or accidental damage during disassembly, extends the life of the insulation monitor 1, reduces maintenance costs, reduces labor intensity, and prevents the ejected insulation monitor 1 from injuring maintenance personnel, further improving the safety of maintenance personnel.

[0053] Please see Figures 1 to 8 In some embodiments, the medium-voltage power distribution system insulation monitoring device further includes a protective mechanism 9 slidably connected to the frame 2. The protective mechanism 9 includes a shield 91 slidably connected to the frame 2. A stabilizing frame 92 is installed at the bottom of the shield 91. A Z-shaped rod 93 for connecting with the push-out member is installed on the stabilizing frame 92.

[0054] This application uses a baffle plate 91 that is slidably connected to the frame 2. A stabilizing frame 92 is installed at the bottom of the baffle plate 91. A Z-shaped rod 93 for connecting with the push-out member is installed on the stabilizing frame 92. The baffle plate 91 slides through the inner and outer walls of the frame 2. The stabilizing frame 92 is fixedly installed at the bottom of the baffle plate 91. The Z-shaped rod 93 is fixedly installed on the inner wall of the stabilizing frame 92. The other end of the Z-shaped rod 93 is fixedly installed on the push-out member 32. After the maintenance personnel reach out and break the wire, they pull the locking rod 73 and locking frame 74 away from the support plate 71, separating them from the locking groove 72. Then, by moving the limiting member 42 upwards, the bottom of the limiting member 42 moves out of the limiting groove 43. With the top of the insulation monitor 1 no longer restricted by the limiting member 42, the pusher 32 slowly pushes the insulation monitor 1 out of the frame 2. As the pusher 32 moves away from the interior of the frame 2, it also moves the Z-shaped rod 93 away from the interior of the frame 2. The Z-shaped rod 93, through the stabilizing frame 92, causes the shielding mechanism to move. The plate 91 moves together toward the inside of the frame 2, causing the shielding plate 91 to slide on the frame 2. When the pusher 32 pushes the insulation monitor 1 out of the frame 2, the shielding plate 91 slides down to block the wire hole 6, thus maintaining the airtightness of the frame 2 and preventing debris from entering the frame 2 after the insulation monitor 1 is removed. After the insulation monitor 1 is ejected, the shielding plate 91 can prevent debris from entering the frame 2, which helps to ensure the smooth installation and removal of the insulation monitor 1, avoids difficulties and jamming during installation and removal due to debris accumulation, and improves maintenance efficiency.

[0055] Please see Figures 5 to 8 In some embodiments, the protective mechanism 9 further includes a load-bearing frame 94 and a load-bearing plate 95. The load-bearing frame 94 is mounted on the frame 2, and the load-bearing plate 95 is mounted on the load-bearing frame 94. A protrusion 96 is installed at the bottom of the shielding plate 91, and a spring piece 97 is installed at the top of the load-bearing plate 95. The protrusion 96 is in contact with the spring piece 97.

[0056] Among them, the spring 97 can be wavy, which further improves the flexibility of the spring 97, reduces the deformation of the spring 97 after repeated use, and further reduces the maintenance cost.

[0057] This application features a load-bearing frame 94 fixedly installed on the inner wall of the frame 2, a load-bearing plate 95 fixedly installed on the inner wall of the load-bearing frame 94, a protrusion 96 fixedly installed at the bottom of the baffle plate 91, and a spring piece 97 fixedly installed at the top of the load-bearing plate 95. The protrusion 96 and the spring piece 97 are in contact. When the baffle plate 91 moves towards the inside of the frame 2, the baffle plate 91 will cause the protrusion 96 to contact the spring piece 97 fixedly installed at the top of the load-bearing plate 95. After contact, the baffle plate 91 will vibrate. The vibration of the baffle plate 91 will shake off the debris adhering between the baffle plate 91 and the wire hole 6, reducing the time for maintenance personnel to clean the baffle plate 91 and the frame 2, thereby improving maintenance efficiency.

[0058] This application, through the mutual contact between the protrusion 96 and the spring 97, can also generate a certain resistance to the Z-shaped rod 93 that contacts the stabilizing frame 92, further improving the delay of the movement of the push-out part 32, protecting the precision parts from impact or accidental damage during disassembly, extending the life of the insulation monitor 1, reducing maintenance costs, and improving safety during maintenance.

[0059] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. An insulation monitoring device for a medium-voltage power distribution system in a nuclear power plant, characterized in that, The device includes an insulation monitor (1) and a frame (2) for mounting the insulation monitor (1). The frame (2) is equipped with a pop-out mechanism (3) for ejecting the insulation monitor (1). The frame (2) is also equipped with a limiting mechanism (4) for restricting the ejection of the insulation monitor (1). The insulation monitor (1) has a wiring hole (5) at its rear end. The frame (2) has a wire-passing hole (6). The pop-out mechanism (3) includes slide bars (31) symmetrically mounted on the frame (2), and a push-out member (32) is slidably connected to the slide bar (31). A first spring (33) is installed between the push-out member (32) and the slide bar (31), and the push-out member (32) is in contact with the rear of the insulation monitor (1).

2. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 1, characterized in that, The limiting mechanism (4) includes a support member (41) installed on the frame (2), a limiting member (42) is slidably connected on the support member (41), a limiting groove (43) is provided on the insulation monitoring instrument (1), the limiting member (42) is inserted into the limiting groove (43), and a second spring (44) is installed between the limiting member (42) and the support member (41).

3. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 2, characterized in that, The limiting mechanism (4) further includes a locking assembly (7) for limiting the movement of the limiting member (42). The locking assembly (7) includes a support plate (71) mounted on the support member (41) and a locking groove (72) opened on the limiting member (42). A locking rod (73) is slidably connected to the support plate (71). A locking frame (74) is sleeved on the locking rod (73). The locking frame (74) is inserted into the locking groove (72). A third spring (75) is installed between the locking frame (74) and the support plate (71).

4. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 2, characterized in that, The bottom end of the limiting member (42) is provided with an inclined surface (76).

5. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 1, characterized in that, It also includes a deceleration mechanism (8) installed on the frame (2) to slow down the ejection speed of the insulation monitor (1). The deceleration mechanism (8) includes a deceleration frame (81) installed inside the frame (2). A deceleration plate (82) is slidably connected inside the deceleration frame (81). A hook plate (83) for connecting with the ejector (32) is installed on the deceleration plate (82). A fourth spring (84) is installed between the hook plate (83) and the deceleration frame (81).

6. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 5, characterized in that, The speed reduction plate (82) has a through hole (85).

7. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 5, characterized in that, The deceleration frame (81) contains liquid, and the deceleration plate (82) is in contact with the deceleration frame (81).

8. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 7, characterized in that, A sealing ring is provided between the deceleration frame (81) and the deceleration plate (82).

9. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 1, characterized in that, It also includes a protective mechanism (9) slidably connected to the frame (2), the protective mechanism (9) including a baffle (91) slidably connected to the frame (2), a stabilizing frame (92) being mounted at the bottom of the baffle (91), and a Z-shaped rod (93) for connecting with the pusher (32) being mounted on the stabilizing frame (92).

10. The insulation monitoring device for medium-voltage power distribution systems in nuclear power plants according to claim 9, characterized in that, The protective mechanism (9) further includes a load-bearing frame (94) and a load-bearing plate (95). The load-bearing frame (94) is installed on the frame (2), and the load-bearing plate (95) is installed on the load-bearing frame (94). A protrusion (96) is installed at the bottom of the shield (91), and a spring piece (97) is installed at the top of the load-bearing plate (95). The protrusion (96) is in contact with the spring piece (97).

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