Low-voltage anti-islanding device

Abstract

The invention discloses a low-voltage anti-islanding device, and relates to the technical field of anti-islanding devices.The low-voltage anti-islanding device comprises a case, supporting legs are fixedly connected to the corners of the lower surface of the case, a sealing cover is rotatably connected to an opening of the case, and a grip is fixedly connected to the outer surface of the sealing cover; a connecting frame is fixedly connected to the inner wall of the case, a positioning mechanism is fixedly connected to the end of the connecting frame and comprises a track frame, the track frame is fixedly connected to the end of the connecting frame, and a track groove is formed in the outer surface of the track frame. According to the clamping device, an operator can conveniently open and close the opening of the case, then equipment can be placed in the inner cavity of the case, the positioning mechanism is arranged, the equipment can be placed in the inner cavity of the case, the equipment with different sizes can be clamped in a self-adaptive mode, and the clamping efficiency is improved. The effect of preventing excessive water vapor around the anti-islanding device from damaging equipment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of anti-islanding devices, in particular to a low-voltage anti-islanding device. Background Art

[0002] The anti-islanding device plays an indispensable and important role in the distributed power generation system. It is mainly composed of a detection unit, a control unit and an execution unit. The detection unit closely monitors the key parameters of the power grid, such as voltage, frequency, and phase, with high-precision sensors, and can accurately capture even the slightest changes. Once the power grid is out of power due to a fault, the control unit will quickly determine whether it is in an island state based on the detection signal and the preset intelligent algorithm. If it is determined that an island is formed, the execution unit will respond immediately, cut off the connection between the distributed power source and the power grid by controlling the circuit breaker, or adjust the power output of the inverter to prevent the continuation of the islanding effect. At a time when distributed power generation such as solar energy and wind energy is widely popularized, the anti-islanding device effectively protects the personal safety of power grid maintenance personnel, avoids damage to power equipment due to island operation, maintains the overall stable operation and power quality of the power grid, and is a key technical means to promote the harmonious coexistence of distributed energy and traditional power grids and ensure the safety and reliability of power systems.

[0003] In the anti-islanding device, excessive water vapor can cause many serious hazards. First, water vapor may corrode the electronic components inside the device. For example, metal lines and chip pins on the circuit board are prone to oxidation reactions in a humid environment, resulting in poor contact or reduced electrical performance, affecting the normal detection and control functions of the device. Secondly, excessive water vapor may cause short circuit failures. When water vapor condenses between components or on the circuit board to form a conductive path, it will instantly generate excessive current, burn electronic components, and make the anti-islanding device unable to accurately monitor grid parameters and perform corresponding operations in a timely manner, greatly reducing its reliability. Furthermore, water vapor will also promote the growth of microorganisms such as mold inside the device. The growth and reproduction of these microorganisms may not only further corrode components and lines, but also block the ventilation and heat dissipation channels inside the device, resulting in poor heat dissipation of the device, and damage due to excessive temperature during operation, which seriously threatens the safe and stable operation of the entire distributed power generation system, and may cause power supply interruption, equipment failure maintenance costs and other adverse consequences. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a low-voltage anti-islanding device, including a chassis, wherein the corners of the lower surface of the chassis are fixedly connected with support legs, a sealing cover is rotatably connected to the opening of the chassis, the outer surface of the sealing cover is fixedly connected with a handle, the inner wall of the chassis is fixedly connected with a connecting frame, the end of the connecting frame is fixedly connected with a positioning mechanism, the positioning mechanism includes a track frame, the track frame is fixedly connected to the end of the connecting frame, and the outer surface of the track frame is provided with a track groove, by arranging the sealing cover and the handle, it is convenient for operators to open and close the chassis opening, and then the device can be placed into the inner cavity of the chassis, by arranging the positioning mechanism, the device can be placed into the inner cavity of the chassis, and it can adaptively clamp devices of different sizes, so that when the entire device encounters vibration, the device can be tightly positioned in the inner cavity of the chassis; the outer side surface of the chassis is symmetrically penetrated by a first grid plate, the first grid plate A sealing mechanism is provided on the outer surface of the chassis, the sealing mechanism includes a second grid plate, the second grid plate is movably connected to the outer surface of the first grid plate, and by arranging the first grid plate and the second grid plate, the airflow in the inner cavity of the chassis can be discharged from the chassis when overlapping, and when the first grid plate and the second grid plate are staggered, the inner cavity of the chassis is in a closed state; a dehumidification mechanism is provided on the bottom surface of the inner cavity of the chassis, the dehumidification mechanism includes a guide plate, the guide plate is fixedly connected to the bottom surface of the inner cavity of the chassis, the upper surface of the guide plate is fixedly connected to a connecting rod, the end of the connecting rod is fixedly connected to a fan, the wind direction of the fan is toward the bottom surface of the inner cavity of the chassis, and a partition is fixedly connected to the inner wall of the chassis. By arranging the dehumidification mechanism, the moisture in the inner cavity of the chassis can be removed, so as to prevent the damage of the electronic equipment caused by excessive moisture in the inner cavity of the chassis, and when the moisture in the inner cavity of the chassis is too high, the chassis can be automatically closed to prevent external moisture from entering the inner cavity of the chassis.

[0005] Preferably, a sliding rod is slidably connected to the track groove opened on the outer surface of the track frame, the end of the sliding rod is fixedly connected to a connecting column, the end of the connecting column is fixedly connected to a limiting tube, the end of the limiting tube is fixedly connected to a first fixing plate, and the first fixing plate is fixedly connected to a placement mechanism on a side away from the limiting tube.

[0006] Preferably, the placement mechanism includes a placement plate, which is fixedly connected to the side of the first fixed plate away from the limiting tube, the upper surface of the placement plate is fixedly connected to a positioning plate, the outer surface of the positioning plate is fixedly connected to a gasket, and the outer surface of the positioning plate is penetrated by a breathable plate.

[0007] Preferably, a placement bar is fixedly connected to the upper surface of the placement plate, the number of the placement bars is several and the placement bars are evenly distributed, a limiting ring is fixedly connected to the inner wall of the placement plate, a roller is rotatably connected to the inner cavity of the limiting ring, and an anti-island device is arranged directly above the placement plate.

[0008] Preferably, a fixing rod is fixedly connected to the end of the track frame, a guide cylinder is fixedly connected to the end of the fixing rod, a sliding column is slidably connected to the inner cavity of the limiting tube, a soft rope is fixedly connected to the end of the sliding column away from the limiting tube, sliding blocks are symmetrically fixedly connected to the upper and lower surfaces of the sliding column, limiting grooves are provided on the upper and lower surfaces of the limiting tube, the sliding block is slidably connected to the limiting grooves provided on the upper and lower surfaces of the limiting tube, a first spring is fixedly connected to the outer surface of the sliding block, and an end of the first spring is fixedly connected to the inner wall of the limiting tube.

[0009] Preferably, the outer side surface of the second grid plate is symmetrically fixedly connected with a sliding sleeve, the inner cavity of the sliding sleeve is slidably connected with a limit rod, the limit rod is fixedly connected to the outer side surface of the chassis, the outer surface of the second grid plate is fixedly connected with an extrusion plate, the lower surface of the extrusion plate is fixedly connected with a second spring, the bottom end of the second spring is fixedly connected with a second fixing plate, and the second fixing plate is fixedly connected to the outer surface of the chassis.

[0010] Preferably, the outer surface of the second grid plate is fixedly connected to a support rod, the top end of the support rod is fixedly connected to a limiting sleeve, the inner cavity of the limiting sleeve is rotatably connected to a rotating block, the upper surface of the rotating block is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected to a threaded ring, the upper surface of the threaded ring is fixedly connected to a connecting frame, and the connecting frame is fixedly connected to one end of the soft rope away from the sliding column.

[0011] Preferably, the dehumidification mechanism also includes a third fixed plate, the third fixed plate is fixedly connected to the inner wall of the chassis, the end of the third fixed plate is fixedly connected to a funnel, the lower surface of the funnel is fixedly connected to a collecting box, the outer surface of the funnel is fixedly connected to a fourth fixed plate, the outer surface of the fourth fixed plate is fixedly connected to a semiconductor refrigerator, the semiconductor refrigerator is sleeved on the outer surface of the collecting box, the inner wall of the funnel is fixedly connected to a water-permeable plate, the lower surface of the funnel is penetrated by a thin tube, and the thin tube is located in the inner cavity of the collecting box.

[0012] Preferably, an inclined tube is symmetrically passed through the outer side surface of the collecting box, a floating block is slidably connected to the inner cavity of the inclined tube, a bent rod is fixedly connected to the outer surface of the floating block, the bent rod extends to the outer surface of the inclined tube, a moving rod is fixedly connected to the side of the bent rod away from the floating block, the end of the moving rod is fixedly connected to the end of the sliding block, and a drain pipe is passed through the outer surface of the collecting box.

[0013] The present invention provides a low-voltage anti-islanding device. It has the following beneficial effects: By providing a sealing cover and a handle, it is convenient for operators to open and close the opening of the chassis, so that the device can be placed in the inner cavity of the chassis. By providing a positioning mechanism, the device can be placed in the inner cavity of the chassis, and can adaptively clamp devices of different sizes, so that when the entire device encounters vibration, the device can be tightly positioned in the inner cavity of the chassis; by providing a first grid plate and a second grid plate, the airflow in the inner cavity of the chassis can be discharged from the chassis when overlapping, and when the first grid plate and the second grid plate are staggered, the inner cavity of the chassis is in a closed state; by providing a dehumidification mechanism, the moisture in the inner cavity of the chassis can be removed, so as to prevent the damage of the electronic equipment caused by excessive moisture in the inner cavity of the chassis, and when the moisture in the inner cavity of the chassis is too high, the chassis can be automatically closed to prevent external moisture from entering the inner cavity of the chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the external structure of a low-voltage anti-islanding device of the present invention; Figure 2 A structural side view of a low-voltage anti-islanding device of the present invention; Figure 3 It is a schematic diagram of the positioning mechanism structure of the present invention; Figure 4 It is a schematic diagram of the local structure of the positioning mechanism of the present invention; Figure 5 It is a schematic diagram of the placement mechanism structure of the present invention; Figure 6 For the present invention Figure 4 A magnified schematic diagram of the structure B in the middle; Figure 7 For the present invention Figure 1 A schematic diagram of the enlarged structure in the middle; Figure 8 It is a schematic diagram of the structure of the dehumidification mechanism of the present invention; Fig. 9 It is a partial structural schematic diagram of the dehumidification mechanism of the present invention; Fig.10 It is a cross-sectional structural schematic diagram of the dehumidification mechanism of the present invention; Fig.11 It is a side view of the dehumidification mechanism structure of the present invention.

[0015] In the figure: 1, chassis; 2, support leg; 3, sealing cover; 4, handle; 5, partition; 6, connecting frame; 7, positioning mechanism; 8, sealing mechanism; 9, dehumidification mechanism; 10, first grid plate; 11, anti-islanding device; 71, track frame; 72, track groove; 73, sliding rod; 74, connecting column; 75, limiting tube; 76, first fixed plate; 77, placing mechanism; 78, fixing rod; 79, guide cylinder; 710, sliding column; 711, sliding block; 712, first spring; 713, soft rope; 771, placing plate; 772, placing strip; 773, limiting ring; 774, roller; 775, positioning plate; 776, Gasket; 777, breathable plate; 81, limit rod; 82, sliding sleeve; 83, second grid plate; 84, extrusion plate; 85, second spring; 86, second fixed plate; 87, support rod; 88, limit sleeve; 89, rotating block; 810, threaded rod; 811, threaded ring; 812, connecting frame; 91, guide plate; 92, connecting rod; 93, fan; 94, third fixed plate; 95, funnel; 96, fourth fixed plate; 97, collecting box; 98, water-permeable plate; 99, capillary; 910, inclined tube; 911, floating block; 912, bent rod; 913, moving rod; 914, semiconductor refrigerator; 915, drain pipe. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0017] like Figure 1 - Fig.11As shown, the present invention provides a technical solution: a low-voltage anti-islanding device, comprising a chassis 1, wherein the corners of the lower surface of the chassis 1 are fixedly connected to support legs 2, the opening of the chassis 1 is rotatably connected to a sealing cover 3, the outer surface of the sealing cover 3 is fixedly connected to a handle 4, the inner wall of the chassis 1 is fixedly connected to a connecting frame 6, the end of the connecting frame 6 is fixedly connected to a positioning mechanism 7, the positioning mechanism 7 comprises a track frame 71, the track frame 71 is fixedly connected to the end of the connecting frame 6, and the outer surface of the track frame 71 is provided with There is a track groove 72. By setting a sealing cover 3 and a handle 4, it is convenient for the operator to open and close the opening of the chassis 1, and then the device can be placed in the inner cavity of the chassis 1. By setting a positioning mechanism 7, the device can be placed in the inner cavity of the chassis 1, and it can adaptively clamp devices of different sizes, so that when the entire device encounters vibration, the device can be tightly positioned in the inner cavity of the chassis 1; the outer side surface of the chassis 1 is symmetrically penetrated by a first grid plate 10, and the outer surface of the first grid plate 10 is provided with a sealing mechanism 8, the sealing mechanism 8 includes a second grid plate 83, the second grid plate 83 is movably connected to the outer surface of the first grid plate 10, and by arranging the first grid plate 10 and the second grid plate 83, the airflow in the inner cavity of the chassis 1 can be discharged from the chassis 1 when overlapping, and when the first grid plate 10 and the second grid plate 83 are staggered, the inner cavity of the chassis 1 is in a closed state; the bottom surface of the inner cavity of the chassis 1 is provided with a dehumidification mechanism 9, and the dehumidification mechanism 9 includes a guide plate 91, and the guide plate 91 is fixedly connected to the bottom surface of the inner cavity of the chassis 1. A connecting rod 92 is fixedly connected to the upper surface of the guide plate 91, and a fan 93 is fixedly connected to the end of the connecting rod 92. The wind direction of the fan 93 is toward the bottom surface of the inner cavity of the chassis 1. A partition 5 is fixedly connected to the inner wall of the chassis 1. By setting up a dehumidification mechanism 9, moisture in the inner cavity of the chassis 1 can be removed, thereby preventing damage to electronic equipment caused by excessive moisture in the inner cavity of the chassis 1. When the moisture in the inner cavity of the chassis 1 is too high, the chassis 1 can be automatically closed to prevent external moisture from entering the inner cavity of the chassis 1.

[0018] A sliding rod 73 is slidably connected to the track groove 72 opened on the outer surface of the track frame 71, and the end of the sliding rod 73 is fixedly connected to a connecting column 74, and the end of the connecting column 74 is fixedly connected to a limiting tube 75, and the end of the limiting tube 75 is fixedly connected to a first fixing plate 76, and a placement mechanism 77 is fixedly connected to the side of the first fixing plate 76 away from the limiting tube 75. By providing the track frame 71 and opening the track groove 72 on its outer surface, the sliding rod 73 can be limited, so that the sliding rod 73 can generate stable sliding in the inner cavity of the track groove 72, and by providing the limiting tube 75 and the first fixing plate 76, the placement mechanism 77 can be placed, so that the placement mechanism 77 can be connected to the sliding rod 73, so that the sliding rod 73 As the placement mechanism 77 slides together, the placement mechanism 77 includes a placement plate 771, the placement plate 771 is fixedly connected to the side of the first fixing plate 76 away from the limiting tube 75, the upper surface of the placement plate 771 is fixedly connected to a positioning plate 775, the outer surface of the positioning plate 775 is fixedly connected to a gasket 776, and the outer surface of the positioning plate 775 is penetrated by a breathable plate 777. By arranging the positioning plate 775 and the placement plate 771, the equipment can be supported and positioned, and equipment of different sizes can be placed. By arranging the gasket 776, the outer side of the equipment can be supported. By arranging the breathable plate 777, the hot air generated by the operation of the equipment can be discharged. The upper surface of the placement plate 771 is fixedly connected There are placement bars 772, the number of which is several and the placement bars 772 are evenly distributed, a limiting ring 773 is fixedly connected to the inner wall of the placement plate 771, a roller 774 is rotatably connected to the inner cavity of the limiting ring 773, and an anti-island device 11 is arranged directly above the placement plate 771. By arranging the placement bars 772, the friction between the placement plate 771 and the lower surface of the anti-island device 11 can be reduced, and then when the anti-island device 11 is placed on the upper surface of the placement plate 771, by arranging the limiting ring 773 and the roller 774, after the anti-island device 11 is placed on the upper surface of the placement plate 771, the placement plate 771 and the anti-island device 11 can be easily generated. The end of the track frame 71 is fixedly connected to a fixing rod 78, and the end of the fixing rod 78 is fixedly connected to a guide cylinder 79. A sliding column 710 is slidably connected to the inner cavity of the limiting tube 75, and one end of the sliding column 710 away from the limiting tube 75 is fixedly connected to a soft rope 713. The upper and lower surfaces of the sliding column 710 are symmetrically fixedly connected to sliding blocks 711. The upper and lower surfaces of the limiting tube 75 are provided with limiting grooves. The sliding block 711 is slidably connected to the limiting grooves provided on the upper and lower surfaces of the limiting tube 75. The outer surface of the sliding block 711 is fixedly connected to a first spring 712, and the end of the first spring 712 is fixedly connected to the inner wall of the limiting tube 75. By setting the guide cylinder 79, the soft rope 713 can be guided.The moving direction of the soft rope 713 can be changed. By setting the limiting tube 75, the sliding column 710 can be limited so that the sliding column 710 can stably move in the inner cavity of the limiting tube 75. By setting the sliding block 711 and the first spring 712, the sliding column 710 can be limited so that the sliding column 710 can only move without rotating, and can rebound and return to its original position after the sliding block 711 moves.

[0019] The outer side surface of the second grid plate 83 is symmetrically fixedly connected with a sliding sleeve 82, and the inner cavity of the sliding sleeve 82 is slidably connected with a limiting rod 81, and the limiting rod 81 is fixedly connected to the outer side surface of the chassis 1. The outer surface of the second grid plate 83 is fixedly connected with an extrusion plate 84, and the lower surface of the extrusion plate 84 is fixedly connected with a second spring 85, and the bottom end of the second spring 85 is fixedly connected with a second fixing plate 86, and the second fixing plate 86 is fixedly connected to the outer surface of the chassis 1. By setting the limiting rod 81, the sliding sleeve 82 can be limited, so that the sliding sleeve 82 can produce an effect of moving up and down on the outer surface of the limiting rod 81, thereby enabling the second grid plate 83 to move up and down. By setting the extrusion plate 84 and the second spring 85, the bottom end of the second grid plate 83 can be supported so that the second grid plate 83 will not move downward when no force is applied. The outer surface of the second grid plate 83 is fixedly connected with a support rod 87, the top of the support rod 87 is fixedly connected with a limiting sleeve 88, the inner cavity of the limiting sleeve 88 is rotatably connected with a rotating block 89, the upper surface of the rotating block 89 is fixedly connected with a threaded rod 810, the outer surface of the threaded rod 810 is threadedly connected with a threaded ring 811, the upper surface of the threaded ring 811 is fixedly connected with a connecting frame 812, the connecting frame 812 is fixedly connected to the end of the soft rope 713 away from the sliding column 710, by setting the limiting sleeve 88, the rotating block 89 can be limited, so that the rotating block 89 can produce stable rotation in the inner cavity of the limiting sleeve 88, and then when the threaded rod 810 rotates, the bottom support rod 87 and the second grid plate 83 will not rotate, and by setting the threaded rod 810 and the threaded ring 811, the distance between the end of the soft rope 713 and the second grid plate 83 can be adjusted.

[0020] The dehumidification mechanism 9 also includes a third fixing plate 94, which is fixedly connected to the inner wall of the chassis 1, and a funnel 95 is fixedly connected to the end of the third fixing plate 94, and a collection box 97 is fixedly connected to the lower surface of the funnel 95, and a fourth fixing plate 96 is fixedly connected to the outer surface of the funnel 95, and a semiconductor refrigerator 914 is fixedly connected to the outer surface of the fourth fixing plate 96. The semiconductor refrigerator 914 is sleeved on the outer surface of the collection box 97, and the inner wall of the funnel 95 is fixedly connected to The water-permeable plate 98, the lower surface of the funnel 95 is penetrated by a thin tube 99, and the thin tube 99 is located in the inner cavity of the collecting box 97. By setting the funnel 95 and the collecting box 97, the water vapor in the air can be collected in the inner cavity of the collecting box 97. By setting the semiconductor refrigerator 914, which is a prior art, after being connected and turned on, it can generate low temperature, thereby reducing the temperature in the inner cavity of the funnel 95, so that when the funnel 95 contacts the air, the water vapor in the air can adhere to the inner cavity of the funnel 95. The collecting box 97 is provided with a thin tube 99, and then enters the inner cavity of the collecting box 97 from the thin tube 99. The outer side of the collecting box 97 is symmetrically penetrated by an inclined tube 910. A floating block 911 is slidably connected to the inner cavity of the inclined tube 910. A bent rod 912 is fixedly connected to the outer surface of the floating block 911. The bent rod 912 extends to the outer surface of the inclined tube 910. A moving rod 913 is fixedly connected to the side of the bent rod 912 away from the floating block 911. The end of the moving rod 913 is fixedly connected to the end of the sliding block 711. A drain pipe 915 penetrates the outer surface of 7. By setting the inclined pipe 910, after the liquid water in the inner cavity of the collection box 97 accumulates to a certain extent, the water can flow into the inner cavity of the inclined pipe 910, and then the floating block 911 can move in the inner cavity of the inclined pipe 910, thereby causing the sliding block 711 to move. The drain pipe 915 is curved, and its highest point is flush with the highest point of the inclined pipe 910. Under the effect of the communicating vessel principle, when the water flow in the inner cavity of the drain pipe 915 is too high, the water flow will be discharged from the drain pipe 915.

[0021] Working principle: When in use, the operator places the anti-islanding device 11 on the upper surface of the placement plate 771. Under the action of the gravity of the anti-islanding device 11, the placement plate 771 is squeezed downward, so that the sliding rod 73 moves in the track groove 72 opened on the outer surface of the track frame 71, so that the positioning plate 775 moves toward the outer surface of the anti-islanding device 11, and finally the gasket 776 moves with the outer surface of the anti-islanding device 11, thereby completing the positioning of the anti-islanding device 11. When the sliding rod 73 moves, the soft rope 713 will be pulled, so it is necessary to adjust the position of the second grid plate 83, rotate the threaded rod 810, and make the threaded rod 810 rotate in the inner cavity of the threaded ring 811, so that the second grid plate 83 moves up and down, and is adjusted to the position where the second grid plate 83 overlaps with the first grid plate 10, so that the airflow in the inner cavity of the chassis 1 can be exchanged with the outside world. When the device is working, the fan 93 and the semi-circular fan 83 are turned on. The conductor cooler 914 is connected to the power supply and turned on, so that the hot steam in the inner cavity of the chassis 1 can be cooled down to ensure the safety of the anti-islanding device 11. When there is too much water vapor in the inner cavity of the chassis 1, the temperature of the funnel 95 will increase under the action of the semiconductor cooler 914. When the water vapor in the air contacts the funnel 95, it will condense into water droplets and enter the inner cavity of the collecting box 97 through the thin tube 99. When the water vapor continues to accumulate, it will flow into the inner cavity of the inclined tube 910, so that the floating block 911 moves upward, and under the action of the bending rod 912 and the moving rod 913, it drives the sliding block 711 to move, and then the sliding column 710 moves in the inner cavity of the limiting tube 75, and finally the soft rope 713 and the second grid plate 83 move downward, so that the second grid plate 83 is staggered with the first grid plate 10, so as to achieve the effect of sealing the chassis 1 and prevent the external water vapor from entering the inner cavity of the chassis 1 again.

[0022] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A low-voltage anti-islanding device, comprising a chassis (1), wherein the corners of the lower surface of the chassis (1) are fixedly connected to support legs (2), the opening of the chassis (1) is rotatably connected to a sealing cover (3), and the outer surface of the sealing cover (3) is fixedly connected to a handle (4), characterized in that: A connecting frame (6) is fixedly connected to the inner wall of the chassis (1); a positioning mechanism (7) is fixedly connected to the end of the connecting frame (6); the positioning mechanism (7) comprises a track frame (71); the track frame (71) is fixedly connected to the end of the connecting frame (6); a track groove (72) is provided on the outer surface of the track frame (71); a first grid plate (10) is symmetrically passed through the outer side surface of the chassis (1); a sealing mechanism (8) is provided on the outer surface of the first grid plate (10); the sealing mechanism (8) comprises a second grid plate (83); the first grid plate (84) is provided on the outer surface of the first grid plate (10); the sealing mechanism (8) comprises a second grid plate (83); the second ... The second grid plate (83) is movably connected to the outer surface of the first grid plate (10); a dehumidification mechanism (9) is provided on the bottom surface of the inner cavity of the chassis (1); the dehumidification mechanism (9) comprises a guide plate (91); the guide plate (91) is fixedly connected to the bottom surface of the inner cavity of the chassis (1); a connecting rod (92) is fixedly connected to the upper surface of the guide plate (91); a fan (93) is fixedly connected to the end of the connecting rod (92); the wind direction of the fan (93) is toward the bottom surface of the inner cavity of the chassis (1); and a partition plate (5) is fixedly connected to the inner wall of the chassis (1).

2. A low voltage anti-islanding device according to claim 1, characterized in that: A sliding rod (73) is slidably connected to a track groove (72) provided on the outer surface of the track frame (71); an end of the sliding rod (73) is fixedly connected to a connecting column (74); an end of the connecting column (74) is fixedly connected to a limiting tube (75); an end of the limiting tube (75) is fixedly connected to a first fixing plate (76); a side of the first fixing plate (76) away from the limiting tube (75) is fixedly connected to a placement mechanism (77).

3. A low voltage anti-islanding device according to claim 2, characterized in that: The placement mechanism (77) comprises a placement plate (771), the placement plate (771) being fixedly connected to a side of the first fixing plate (76) away from the limiting tube (75), the upper surface of the placement plate (771) being fixedly connected to a positioning plate (775), the outer surface of the positioning plate (775) being fixedly connected to a gasket (776), and the outer surface of the positioning plate (775) being penetrated by a breathable plate (777).

4. A low voltage anti-islanding device according to claim 3, characterized in that: The upper surface of the placement plate (771) is fixedly connected to a placement bar (772), the number of the placement bars (772) is multiple and the multiple placement bars (772) are evenly distributed, the inner wall of the placement plate (771) is fixedly connected to a limit ring (773), the inner cavity of the limit ring (773) is rotatably connected to a roller (774), and an anti-island device (11) is arranged directly above the placement plate (771).

5. A low-voltage anti-islanding device according to claim 4, characterized in that: A fixing rod (78) is fixedly connected to the end of the track frame (71), and a guide tube (79) is fixedly connected to the end of the fixing rod (78). A sliding column (710) is slidably connected to the inner cavity of the limiting tube (75), and a soft rope (713) is fixedly connected to one end of the sliding column (710) away from the limiting tube (75). A sliding block (711) is symmetrically fixedly connected to the upper and lower surfaces of the sliding column (710). Limiting grooves are provided on the upper and lower surfaces of the limiting tube (75), and the sliding block (711) is slidably connected to the limiting grooves provided on the upper and lower surfaces of the limiting tube (75). A first spring (712) is fixedly connected to the outer surface of the sliding block (711), and an end of the first spring (712) is fixedly connected to the inner wall of the limiting tube (75).

6. A low voltage anti-islanding device according to claim 5, characterized in that: The outer side surface of the second grid plate (83) is symmetrically fixedly connected to a sliding sleeve (82), the inner cavity of the sliding sleeve (82) is slidably connected to a limit rod (81), the limit rod (81) is fixedly connected to the outer side surface of the chassis (1), the outer surface of the second grid plate (83) is fixedly connected to an extrusion plate (84), the lower surface of the extrusion plate (84) is fixedly connected to a second spring (85), the bottom end of the second spring (85) is fixedly connected to a second fixing plate (86), and the second fixing plate (86) is fixedly connected to the outer surface of the chassis (1).

7. A low voltage anti-islanding device according to claim 6, characterized in that: The outer surface of the second grid plate (83) is fixedly connected to a support rod (87), the top end of the support rod (87) is fixedly connected to a limiting sleeve (88), the inner cavity of the limiting sleeve (88) is rotatably connected to a rotating block (89), the upper surface of the rotating block (89) is fixedly connected to a threaded rod (810), the outer surface of the threaded rod (810) is threadedly connected to a threaded ring (811), the upper surface of the threaded ring (811) is fixedly connected to a connecting frame (812), and the connecting frame (812) is fixedly connected to one end of the soft rope (713) away from the sliding column (710).

8. A low voltage anti-islanding device according to claim 7, characterized in that: The dehumidification mechanism (9) further comprises a third fixing plate (94), the third fixing plate (94) being fixedly connected to the inner wall of the chassis (1), a funnel (95) being fixedly connected to the end of the third fixing plate (94), a collecting box (97) being fixedly connected to the lower surface of the funnel (95), a fourth fixing plate (96) being fixedly connected to the outer surface of the funnel (95), a semiconductor cooler (914) being fixedly connected to the outer surface of the collecting box (97), a water-permeable plate (98) being fixedly connected to the inner wall of the funnel (95), a thin tube (99) penetrating the lower surface of the funnel (95), and the thin tube (99) being located in the inner cavity of the collecting box (97).

9. A low-voltage anti-islanding device according to claim 8, characterized in that: The outer side surface of the collection box (97) is symmetrically penetrated by an inclined tube (910); a floating block (911) is slidably connected to the inner cavity of the inclined tube (910); a bent rod (912) is fixedly connected to the outer surface of the floating block (911); the bent rod (912) extends to the outer surface of the inclined tube (910); a moving rod (913) is fixedly connected to the side of the bent rod (912) away from the floating block (911); the end of the moving rod (913) is fixedly connected to the end of the sliding block (711); and a drainage pipe (915) is penetrated by the outer surface of the collection box (97).

Images