Transformer for grid-connected power supply of distributed photovoltaic power supply of distribution network

Abstract

A clamping groove is formed in the bottom end of the suspension seat, and filling grooves are formed in the two side faces of the suspension seat. The bottom end of the suspension seat is fixedly connected with an air inlet pipe extending into the filling groove, and one end of the air inlet pipe is fixedly connected with an air bag. Accordingly, the inventor further designs a corresponding suspension device and a distribution network distributed photovoltaic power supply grid-connected power supply transformer applying the suspension device. By arranging a suspension seat, an elastic film and a plug pin, when accumulated water at the transformer submerges the suspension seat, a water-soluble plugging block is dissolved, the elastic film is reset to drive the plug pin to move, the plug pin is separated from a slot in the surface of a balancing weight, and meanwhile water in the plug pin flows out and makes contact with an effervescent disintegrant to react to generate a large amount of carbon dioxide gas; the carbon dioxide gas enables the elastic film to expand outwards and simultaneously enables the air bag to expand, so that the buoyancy of the suspension seat is greatly increased, the base and the transformer can be driven to float upwards, and the transformer is prevented from being submerged and damaged due to flood in low-lying areas in rainstorm and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of grid-connected power supply, and particularly relates to a transformer for grid-connected power supply of distributed photovoltaic power sources in a distribution network. Background Art

[0002] Photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photovoltaic effect at the semiconductor interface. It mainly consists of three major parts: solar panels, controllers, and inverters, and the main components are composed of electronic components. Grid connection means that separate communication, power transmission and other lines are incorporated into the entire network and become a part of it. China's GB / T 19939-2005 standard is based on whether the photovoltaic power generation system allows power to be sent to the high-voltage power grid through the transformer in the power supply area.

[0003] Existing transformers for grid connection have certain drawbacks when in use. For some transformers installed in low-lying areas, once there is heavy rain or other weather, flooding is likely to occur in the low-lying areas, resulting in the phenomenon that the transformers are submerged and damaged. Therefore, there is an urgent need to develop a technology to extend the service life of transformers in low-lying areas. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a transformer for grid-connected power supply of distributed photovoltaic power sources in a distribution network, which can avoid the transformer being submerged and damaged by water.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A suspension seat, the bottom end of the suspension seat is provided with a card slot, and the two side surfaces are provided with filling grooves; the bottom end of the filling groove is provided with a through hole communicating with the card slot, and the mouth of the filling groove is threadedly connected with an external thread ring. The end surface of the external thread ring facing the filling groove is fixedly connected with an inwardly concave elastic membrane. One end of the elastic membrane is fixedly connected with one end of a plug pin, and the other end of the plug pin penetrates through the through hole; the plug pin is hollow, and water outlet holes are provided on the surface of the plug pin. Cold water is filled inside the plug pin; in the area between the elastic membrane and the inner wall of the filling groove inside the filling groove, effervescent disintegrating agent powder is filled; a plurality of circularly distributed partition plates are fixedly connected to the inner wall of the external thread ring. One end of the partition plate is fixedly connected with a sleeve, and an air injection pipe is fixedly connected inside the sleeve. A one-way valve is arranged inside the air injection pipe, and a water-soluble sealing block is fixedly connected between adjacent partition plates; the bottom end of the suspension seat is fixedly connected with an air inlet pipe extending into the filling groove, and one end of the air inlet pipe is fixedly connected with an airbag.

[0007] A suspension device, including a counterweight and the above-mentioned suspension seat; the upper part of the counterweight matches the card slot of the suspension seat, and slot grooves matching and plugging with the plug pins of the suspension seat are provided on both side surfaces of the counterweight.

[0008] The interior of the counterweight is provided with a cavity communicating with the slot. A moving plate is slidably connected inside the cavity. A first magnet block is installed at the top end of the moving plate, and a buffer spring is fixedly connected to the bottom end of the moving plate; a transmission component is arranged between the first magnet block and the bolt.

[0009] The transmission component includes a moving block and a second straight tooth plate slidably connected inside the slot. One end of the second straight tooth plate contacts the bolt. A transmission rod is rotatably connected between one end of the moving block and the top end of the first magnet block; a linkage gear is rotatably connected to the inner wall of the slot between the moving block and the second straight tooth plate. First straight tooth plates and push blocks meshing with the linkage gear are fixedly connected to the other ends of the second straight tooth plate and the moving block respectively.

[0010] A transformer for grid-connected power supply of distribution network distributed photovoltaic power sources includes a transformer and a base, and the base is placed on the above-mentioned suspension device.

[0011] The transformer is installed at the top end of the base. Plugging rods are fixedly connected to the four corners at the bottom end of the transformer. A telescopic cylinder is sleeved outside the plugging rods. The suspension seat in the above-mentioned suspension device is fixedly connected to the bottom end of the base. The counterweight is arranged in the card slot of the suspension seat and is connected through the bolt and the slot.

[0012] A second magnet block mutually repulsive with the first magnet block is arranged inside the base.

[0013] In view of the problems existing in the transformers currently installed in low-lying areas, the inventor designed a suspension seat. A card slot is opened at the bottom end of the suspension seat, and filling grooves are opened on both side surfaces; through holes communicating with the card slot are opened at the bottom end of the filling grooves. An external thread ring is threadedly connected to the slot opening of the filling groove. An inwardly concave elastic film is fixedly connected to the end surface of the external thread ring facing the filling groove. One end of a bolt is fixedly connected to the surface of the elastic film, and the other end of the bolt penetrates through the through hole; the bolt is hollow, water outlet holes are opened on the surface of the bolt, and cold water is filled inside the bolt; Effervescent disintegrating agent powder is filled in the area between the elastic film and the inner wall of the filling groove inside the filling groove; a plurality of partition plates distributed in a circular shape are fixedly connected to the inner wall of the external thread ring. A sleeve is fixedly connected to one end of the partition plate, an air injection pipe is fixedly connected inside the sleeve, a one-way valve is arranged inside the air injection pipe, and a water-soluble plugging block is fixedly connected between adjacent partition plates; An air inlet pipe extending into the filling groove is fixedly connected to the bottom end of the suspension seat, and an airbag is fixedly connected to one end of the air inlet pipe. Accordingly, the inventor further designed a corresponding suspension device and a transformer for grid-connected power supply of distribution network distributed photovoltaic power sources applying this suspension device.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The transformer for grid-connected power supply of the present invention is provided with a floating seat, an elastic membrane and a bolt. When the accumulated water at the transformer submerges the floating seat, at this time, the water-soluble plugging block is dissolved, the elastic membrane resets and then drives the bolt to move, so that the bolt is separated from the slot on the surface of the counterweight block. At the same time, the water inside the bolt flows out and reacts with the effervescent disintegrant to generate a large amount of carbon dioxide gas. The carbon dioxide gas makes the elastic membrane expand outwards and also makes the airbag expand, so that the buoyancy of the floating seat is greatly increased, thereby driving the base and the transformer to float, avoiding the transformer being damaged by water flooding in low-lying areas during rainy days and other weather conditions.

[0016] 2. The transformer for grid-connected power supply of the present invention is provided with a first magnet block, a second magnet block and a transmission component. When the transformer is working normally, it will generate vibrations, causing the second magnet block to vibrate up and down. Then, due to the repulsive force between the second magnet block, the first magnet block also moves up and down. Through the transmission component, the bolt can be pushed to move. Under the action of the gas inside the elastic membrane, the buffer function of the transformer can be realized.

[0017] In addition, the floating seat and the floating device in the present invention can not only be used for the transformer for grid-connected power supply of the above-mentioned distribution network distributed photovoltaic power source, but are also suitable for other occasions with similar situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic three-dimensional structure diagram of the transformer for grid-connected power supply of the distribution network distributed photovoltaic power source of the present invention Figure 1 .

[0019] Figure 2 is a schematic three-dimensional structure diagram of the transformer for grid-connected power supply of the distribution network distributed photovoltaic power source of the present invention Figure 2 .

[0020] Figure 3 is a schematic internal structure diagram of the transformer for grid-connected power supply of the distribution network distributed photovoltaic power source of the present invention.

[0021] Figure 4 is Figure 3 the enlarged structure diagram at A in

[0022] Figure 5 is Figure 3 the enlarged structure diagram at B in

[0023] Figure 6 is a schematic connection structure diagram of the external thread ring and the floating seat of the transformer for grid-connected power supply of the distribution network distributed photovoltaic power source of the present invention.

[0024] In the figure: 1, transformer; 2, base; 3, counterweight; 4, floating seat; 401, filling groove; 5, telescopic cylinder; 6, insertion rod; 7, moving plate; 8, buffer spring; 9, first magnet block; 10, second magnet block; 11, external thread ring; 12, water-soluble plugging block; 13, partition plate; 14, air injection pipe; 15, transmission rod; 16, moving block; 17, linkage gear; 18, first straight tooth plate; 19, pushing block; 20, second straight tooth plate; 21, elastic membrane; 22, bolt; 23, airbag. Detailed implementation manner

[0025] I. Basic structure

[0026] As Figures 1 to 6 shown, the transformer for grid-connected power supply of distribution network distributed photovoltaic power supply of the present invention includes a transformer 1, a base 2 and a floating device, and the base is placed on the floating device. Among them, the floating device includes a counterweight 3 and a floating seat 4; the upper part of the counterweight matches the card slot of the floating seat, and the two side surfaces of the counterweight are provided with slots that match and are inserted with the bolts of the floating seat. The transformer is installed at the top of the base, and the bottom four corners of the transformer are fixedly connected with insertion rods 6. The outside of the insertion rod is sleeved with a telescopic cylinder 5. The bottom end of the telescopic cylinder is installed on the ground. The bottom end of the base is fixedly connected with the floating seat in the above floating device. The counterweight fixed on the ground is arranged in the card slot of the floating seat and is connected through the bolt slot. Setting the floating seat enables the transformer to float when water contacts the floating seat; setting the counterweight can ensure the stability of the transformer during normal use; the insertion rod cooperating with the telescopic cylinder can play a limiting role on the transformer to prevent the transformer from floating away with the water.

[0027] The bottom end of the floating seat is provided with a card slot, and the two side surfaces are provided with filling grooves 401; the bottom end of the filling groove is provided with a through hole communicating with the card slot, and an external thread ring 11 is threadedly connected to the notch of the filling groove. One end face of the external thread ring facing the filling groove is fixedly connected with an inward concave elastic membrane 21, and one end of a plug 22 is fixedly connected to the surface of the elastic membrane. The other end of the plug penetrates through the through hole; the plug is hollow, and water outlet holes are formed on the surface of the plug. Cold water is filled inside the plug. After the plug is drawn out of the slot, water can immediately be discharged through the water outlet holes to contact with the effervescent disintegrating agent to generate a large amount of carbon dioxide gas; the area between the elastic membrane and the inner wall of the filling groove inside the filling groove is filled with effervescent disintegrating agent powder. The effervescent disintegrating agent powder can contact with water to generate a large amount of carbon dioxide gas, thereby causing the elastic membrane and the airbag to expand, which can greatly increase the buoyancy of the floating seat, enabling the floating seat to drive the base and the transformer to float, and preventing the transformer from being damaged by water immersion; a plurality of circularly distributed partition plates 13 are fixedly connected to the inner wall of the external thread ring. One end of the partition plate is fixedly connected with a sleeve, and an air injection pipe 14 is fixedly connected inside the sleeve. A one-way valve is arranged inside the air injection pipe, and a water-soluble sealing block 12 is fixedly connected between adjacent partition plates. The bottom end of the floating seat is fixedly connected with an air inlet pipe extending into the filling groove. One end of the air inlet pipe is fixedly connected with an airbag 23. When the effervescent disintegrating agent powder generates a large amount of carbon dioxide gas upon contact with water and expands, the airbag can further increase the buoyancy of the floating seat. The setting of the external thread ring makes it convenient to disassemble the plug and the elastic membrane, facilitating the filling of the effervescent disintegrating agent powder in the filling groove and at the same time facilitating the replenishment of cold water inside the plug. The setting of the air injection pipe facilitates the use of an air pump to inflate the inside of the elastic membrane, causing the elastic membrane to bulge inward and enabling the plug to be inserted into the slot on the surface of the counterweight block.

[0028] An inner cavity communicating with the slot is formed inside the counterweight block. A moving plate 7 is slidably connected inside the inner cavity. A first magnet block 9 is installed at the top end of the moving plate, and a buffer spring 8 is fixedly connected to the bottom end of the moving plate; a transmission component is arranged between the first magnet block and the plug. The transmission component includes a moving block 16 and a second straight tooth plate 20 slidably connected inside the slot. One end of the second straight tooth plate contacts with the plug. A transmission rod 15 is rotatably connected between one end of the moving block and the top end of the first magnet block; a linkage gear 17 is rotatably connected to the inner wall of the slot between the moving block and the second straight tooth plate. First straight tooth plates 18 and pushing blocks 19 meshing with the linkage gear are fixedly connected to the other ends of the second straight tooth plate and the moving block respectively. The setting of the transmission component can convert the up-and-down movement of the first magnet block into the horizontal movement of the pushing block, and then buffer the transformer through the elastic membrane and the gas inside it.

[0029] A second magnet block 10 mutually repulsive with the first magnet block is arranged inside the base. On the one hand, it realizes the shock absorption and noise reduction of the transformer during operation. On the other hand, when the floating seat floats, it can play a certain upward pushing role to accelerate the floating of the transformer.

[0030] II. Working Principle

[0031] During use, when the transformer is operating normally, the transformer generates vibrations and drives the second magnet block to move up and down. Under the repulsive force between the first magnet block and the second magnet, a preliminary buffering effect can be achieved on the transformer. At the same time, the transmission component can be used to push the bolt to move, so that the bolt presses the elastic film. Under the action of the gas inside the elastic film, a further buffering effect can be achieved on the vibrations of the transformer, thereby realizing the shock absorption of the transformer and reducing the noise of the transformer.

[0032] When there is a flood in a low-lying area during a heavy rainstorm, rainwater will accumulate at the floating seat. When the rainwater submerges the floating seat, the rainwater will dissolve the water-soluble plugging block. At this time, the gas inside the elastic film will quickly eject. At this time, the elastic film resets under its own elastic force and drives the bolt to move, separating it from the slot. When the bolt is pulled out of the slot, the cold water inside the bolt quickly flows out and contacts the effervescent disintegrant powder to generate a large amount of carbon dioxide gas. The large amount of carbon dioxide gas causes the elastic film to expand and the airbag to expand at the same time, which can greatly increase the buoyancy of the floating block, enabling the floating block to drive the base and the transformer to move upward, avoiding the transformer being submerged and damaged;

[0033] After the floating seat completes a floating operation, it is necessary to replenish the effervescent disintegrant powder inside it and the cold water inside the bolt. The external thread ring can be rotated out of the notch of the filling groove, and then the effervescent disintegrant powder can be replenished into the filling groove. Then, a water-soluble plugging block (such as a sugar cube) is set at the water outlet of the bolt to achieve the temporary plugging function of the water outlet hole, which is convenient for injecting cold water into the bolt. It should be noted that when the bolt is inserted into the slot, the cold water will gradually dissolve the water-soluble plugging block. Since the bolt is closely fitted with the inner wall of the slot, the water will not flow out through the water outlet hole. Finally, rotate the external thread ring to make it combine with the notch of the filling groove.

Claims

1. A suspension seat, characterized in that The bottom end of the suspension seat is provided with a card slot, and filling slots are provided on both side surfaces; the bottom end of the filling slot is provided with a through hole that is interconnected with the card slot, and the notch of the filling slot is threadedly connected to an external threaded ring, and the end face of the external threaded ring facing the filling slot is fixedly connected to an inwardly concave elastic membrane, the surface of the elastic membrane is fixedly connected to one end of the plug, and the other end of the plug is passed through the through hole; the plug is hollow, and the surface of the plug is provided with a water outlet hole, and the interior of the plug is filled with cold water; the interior of the filling slot is located in an area between the elastic membrane and the inner wall of the filling slot and is filled with effervescent disintegrant powder; the inner wall of the external threaded ring is fixedly connected to a number of circularly distributed partition plates, one end of the partition plate is fixedly connected to a sleeve, an air pump is fixedly connected to the sleeve, a one-way valve is provided inside the air pump, and a water-soluble blocking block is fixedly connected between adjacent partition plates; the bottom end of the suspension seat is fixedly connected to an air inlet pipe extending to the interior of the filling slot, and one end of the air inlet pipe is fixedly connected to an air bag.

2. A suspension device, characterized in that It comprises a counterweight block and the suspension seat according to claim 1; the upper part of the counterweight block matches the card slot of the suspension seat, and the two side surfaces of the counterweight block are provided with slots that match and plug into the pins of the suspension seat.

3. The suspension device according to claim 2, characterized in that: The counterweight block has an inner cavity connected to the slot, a movable plate is slidably connected to the inner cavity, a first magnet block is installed on the top of the movable plate, and a buffer spring is fixedly connected to the bottom of the movable plate; a transmission assembly is provided between the first magnet block and the pin.

4. The suspension device according to claim 3, characterized in that: The transmission assembly includes a moving block and a second spur plate slidably connected inside the slot, one end of the second spur plate is in contact with the latch, and a transmission rod is rotatably connected between one end of the moving block and the top of the first magnet block; the inner wall of the slot is located between the moving block and the second spur plate and is rotatably connected to a linkage gear, and the other ends of the second spur plate and the moving block are fixedly connected to the first spur plate and the pushing block that are meshed with the linkage gear.

5. A transformer for grid-connected power supply of distributed photovoltaic power supply in a distribution network, comprising a transformer and a base, characterized in that: The base is placed on the suspension device according to claim 2.

6. The transformer for grid-connected power supply of distributed photovoltaic power supply according to claim 5, characterized in that: The transformer is installed at the top of the base, and the four corners of the bottom end of the transformer are fixedly connected with a plug-in rod, and a telescopic cylinder is sleeved on the outer side of the plug-in rod. The bottom end of the base is fixedly connected to the suspension seat in the suspension device described in claim 2, and the counterweight block is set in the card slot of the suspension seat and connected through the pin slot.

7. The transformer for grid-connected power supply of distributed photovoltaic power supply according to claim 6, characterized in that: A second magnet block that repels the first magnet block is provided inside the base.

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