Box-type transformer for photovoltaic power generation

Abstract

The utility model belongs to the technical field of photovoltaic power generation, and discloses a box-type transformer for photovoltaic power generation, which comprises a box body, the box body is provided with a sealing assembly, the box-type transformer further comprises a detection assembly matched with the sealing assembly, the detection assembly comprises fan blades, and the fan blades are rotatably arranged on the outer side of the side wall of the box body; the cam is rotationally arranged on the inner side of the side wall of the box body and is coaxially and fixedly connected with a rotating shaft of the fan blades; the air pump is matched with the cam; the air cylinder is communicated with the air outlet end of the air pump through a pipeline; the scale pan is rotationally arranged on the outer side of the side wall of the box body, and a piston rod of the air cylinder is used for driving the scale pan to rotate upwards, so that sand wind falls into the scale pan; according to the scheme, the state of the sealing assembly is controlled by detecting the content of wind and sand, and good ventilation and heat dissipation performance is ensured while equipment protection is ensured; according to the utility model, the problem of poor heat dissipation of equipment caused by automatic sealing of the existing box-type transformer substation structure under the condition of strong wind is solved.

Description

TECHNICAL FIELD

[0001] The present scheme belongs to the technical field of photovoltaic power generation, and particularly relates to a box-type transformer for photovoltaic power generation. BACKGROUND

[0002] Referring to the background art of the existing publication (announcement) No. CN111555167B, the box-type transformer station (referred to as "box transformer") is also called a prefabricated transformer substation or a prefabricated transformer station. It is a kind of prefabricated indoor and outdoor compact distribution equipment which arranges high-voltage switchgear, distribution transformer and low-voltage distribution device according to a certain wiring scheme. The box-type transformer station is suitable for mines, factories, oil and gas fields, wind power and photovoltaic power stations. It replaces the original civil distribution room and distribution station and becomes a new complete transformer distribution device.

[0003] Referring to the document of the existing publication (announcement) No. CN118539298A, a general box transformer structure for photovoltaic and wind power generation is disclosed, which comprises a main box body, an upper ventilation member, a lower ventilation member and an outer ventilation cover plate. The upper ventilation member is arranged above the main box body, the lower ventilation member is fixed to the lower part of the main box body, the outer ventilation cover plate is slidably arranged on the outer side of the lower ventilation member, the tail inner side of the upper ventilation member is provided with an exhaust fan, the inner side of the upper ventilation member is fixed with an upper partition plate, the front part of the upper partition plate is fixed with an upper front baffle frame of U-shaped structure, and the front part of the upper front baffle frame is slidably provided with an upper scissor support on both sides. The lower part of the upper front baffle is spaced apart to form an upper communication groove. The upper communication groove of the upper front baffle is tightly sealed, the flow-through space outside is reduced, and the situation of sandstorm and rain entering the main box body is reduced.

[0004] The above box transformer structure can move the upper front baffle frame close to the upper ventilation member under the action of strong wind in extreme weather such as desert storm, the upper front baffle frame and the upper communication groove of the upper front baffle are slidably inserted, the upper communication groove of the upper front baffle is sealed, the flow-through space outside the upper ventilation member is reduced, and the situation of sandstorm and rain entering the main box body along the upper communication groove is reduced, thereby reducing the situation of the internal equipment of the main box body being polluted by sand and dust. However, the box transformer structure is automatically sealed and the flow-through space is reduced under the action of strong wind, although it can effectively reduce the sandstorm and rain entering the main box body in extreme weather such as desert storm, and protect the internal equipment, but in ordinary strong wind weather without desert storm, there is no large amount of sand and dust in the wind, the box transformer structure still reduces the ventilation space, which will cause poor heat dissipation of the equipment, temperature rise, affect the operation efficiency and service life, and increase the risk of failure. At the same time, this "one-size-fits-all" sealing method cannot judge different wind conditions and cannot adapt to changing environmental conditions, which is not conducive to the long-term stable operation of the photovoltaic power generation system. CONTENT OF THE UTILITY MODEL

[0005] The purpose of the present scheme is to provide a box-type transformer for photovoltaic power generation to solve the problem of poor heat dissipation of the equipment caused by automatic sealing of the existing box transformer structure under the action of strong wind.

[0006] In order to achieve the above-mentioned purpose, the scheme provides a box-type transformer for photovoltaic power generation, comprising a box, the box is provided with a sealing assembly, further comprising a detection assembly matched with the sealing assembly, the detection assembly comprises:

[0007] A fan blade is rotationally arranged outside the side wall of the box;

[0008] A cam is rotationally arranged inside the side wall of the box and fixedly connected with the rotating shaft of the fan blade coaxially;

[0009] A gas pump is arranged in cooperation with the cam;

[0010] A gas cylinder is in communication with the gas outlet of the gas pump through a pipeline;

[0011] A scale pan is rotationally arranged outside the side wall of the box, and the piston rod of the gas cylinder is used to drive the scale pan to rotate upward so that the sand and dust fall into the scale pan.

[0012] The principle and effect of the scheme are as follows: (1) the fan blade is arranged outside the box, when there is strong wind or storm outside the box transformer, the wind drives the fan blade to rotate, the fan blade drives the cam to rotate circumferentially, thereby impacting the gas pump, so that the gas pump produces gas and supplies the gas to the gas cylinder from the gas outlet, thereby driving the piston rod of the gas cylinder to extend, and the piston rod of the gas cylinder drives the scale pan to rotate upward to a quantitative time, for example, 5 minutes. If it is a stormy weather, the sand content in the wind is high, and the sand and stones falling into the scale pan are relatively more, the scale pan weighs the sand and stones, if the weight exceeds the threshold value, the sealing assembly is in a sealed state, so as to prevent the external sand and dust from entering the box. If it is a windy weather, that is, the sand content is small, and the sand and stones falling into the scale pan are relatively small, within the same time, the weight does not exceed the threshold value, at this time, the sealing assembly is in an unsealed state, and the inside and outside of the box can be ventilated. (2) the scheme solves the problem that the existing box transformer structure is automatically sealed in strong wind, thereby causing poor heat dissipation of the equipment, and controls the state of the sealing assembly by detecting the sand content, thereby ensuring good ventilation and heat dissipation performance while ensuring protection of the equipment.

[0013] Further, the piston rod of the gas cylinder is connected with a rack, the side wall of the box is rotationally connected with a gear, the gear is engaged with the rack, the gear is fixedly connected with a support rod coaxially, the free end of the support rod is fixedly connected with the scale pan, and the scale pan is electrically connected with a controller; a first electromagnetic valve is arranged on the pipeline connected with the gas pump and the gas cylinder, and the first electromagnetic valve is electrically connected with the controller.

[0014] The principle and effect of the scheme are that in the initial state, the piston rod of the air cylinder is in the state of being retracted into the cylinder body. When the piston rod of the air cylinder is extended, the rack is driven to move, the rack drives the gear to rotate, the gear drives the support rod to rotate, so that the scale pan is rotated upward, the weighing disc opening of the scale pan is upward, and the sand is dropped into the weighing disc. The sand is weighed by the weighing module of the scale pan, and whether the weight threshold is exceeded is detected.

[0015] Further, the sealing assembly comprises a plurality of partitions, both ends of the partition are rotationally connected with the side wall of the box body, and the adjacent partitions are connected by a traction line. The gap between the adjacent partitions is smaller than the width of the partition. The sealing assembly further comprises a driving unit, which is used to drive the plurality of partitions to rotate, so that the adjacent partitions overlap each other to form a sealing surface.

[0016] The principle and effect of the scheme are that in the initial state, the partition naturally droops, so that the edges of the adjacent partitions overlap each other to form a continuous sealing surface, thereby realizing sealing. At this time, the sand outside the box body cannot enter the box body. If the sand situation is detected, the controller controls the first electromagnetic valve to open. At this time, the gas is sprayed from the first electromagnetic valve and cannot enter the air cylinder again. The air cylinder cannot drive the rack to continue to move, so that the partition is in a sealing state in the sand situation. When the strong wind situation is detected, the driving unit drives the plurality of partitions to rotate around the rotation connection points of the partitions and the side wall of the box body. Due to the connection effect of the traction line, the edges of the adjacent partitions gradually move away from each other, so that a gap is formed between the adjacent partitions to form a ventilation opening, thereby realizing ventilation and heat dissipation of the box body.

[0017] Further, the driving unit comprises a driving rod, a driving cone and a driven cone. One end of the driving rod is fixedly connected with one of the partitions. The free end of the driving rod is coaxially fixedly connected with the driven cone. The driving cone is engaged with the driven cone. The driving cone is rotationally connected with the side wall of the box body. The driving cone is coaxially fixedly connected with a driving gear. The driving gear is arranged at the rear end of the gear, and the driving gear is arranged in cooperation with the rack.

[0018] The principle and effect of the scheme are that if the storm weather is detected, the controller controls the first electromagnetic valve to open. At this time, the gas is sprayed from the first electromagnetic valve and cannot enter the air cylinder again. The air cylinder cannot drive the rack to continue to move, so that the partition is in a sealing state in the sand situation. If the strong wind weather is detected, the controller controls the first electromagnetic valve to close. At this time, the gas continues to enter the air cylinder, so that the piston rod of the air cylinder is elongated to the limit position, thereby moving the rack to engage with the driving gear, driving the driving gear to rotate, and driving the driving gear to rotate, thereby driving the driving rod to rotate and driving one of the partitions to rotate. The remaining partitions are driven to rotate in the same direction by the traction money, so that a gap is formed between the adjacent partitions to form a ventilation opening.

[0019] Further, the cleaning assembly is arranged in the box, the cleaning assembly comprises a screen and a gas storage chamber, the screen is arranged on the back of the plurality of partitions, the gas storage chamber is communicated with the gas outlet of the gas pump through a pipeline, the back of the side wall of the box is provided with a gas jet plate, the gas outlet of the gas jet plate faces the screen and is directed to the outside of the box, the gas jet plate is communicated with the gas storage chamber through a pipeline, a second electromagnetic valve is arranged on the pipeline connected with the gas jet plate and the gas storage chamber, and the second electromagnetic valve is electrically connected with the controller.

[0020] The principle and effect of the scheme are that although ventilation is achieved through the gaps between the partitions in the case of non-storm weather, dust is still in the air, so the screen is arranged to filter dust and impurities to avoid entering the box. The screen is arranged, and after the screen is used for a period of time, the screen holes are easily blocked, so the screen needs to be cleaned. The fan, the gas pump and the cam are used to store the gas generated by the gas pump in the gas storage chamber. When the screen needs to be cleaned, the second electromagnetic valve is opened by the controller, so that the gas in the gas storage chamber enters the gas jet plate through the pipeline, so that the gas jet plate sprays gas, the gas outlet of the gas jet plate faces the screen and is directed to the outside of the box, so that the dust on the screen is blown to the outside of the box to clean the screen.

[0021] Further, the gas jet plate is slidably connected with the back of the side wall of the box, the side wall of the box is provided with a nozzle, the nozzle is communicated with the gas storage chamber through a pipeline, the gas outlet of the nozzle is directed to the gas jet plate, the nozzle sprays gas to drive the gas jet plate to move, the gas jet plate is connected with a return spring, and the free end of the return spring is fixedly connected with the back of the side wall of the box.

[0022] The principle and effect of the scheme are that since the screen covers all the plurality of partitions, the area of the screen is large. When the screen needs to be cleaned, the high-pressure gas in the gas storage chamber is transported to the nozzle through the pipeline, the high-speed airflow sprayed by the nozzle drives the gas jet plate to move along the width direction of the screen, so that the screen is cleaned as a whole. The gas jet plate is connected with a return spring, and when the gas jet stops, the return spring pulls the gas jet plate back to the initial position.

[0023] Further, one side of the gas jet plate facing the nozzle is rotationally connected with a driving fan blade, the driving fan blade is coaxially fixedly connected with a knocking block, and the knocking block is used for knocking the screen.

[0024] The principle and effect of the scheme are that only blowing gas to the screen in a direction cannot obviously clean the screen. When the nozzle sprays gas, the driving fan blade rotates to drive the knocking block to rotate, so that the knocking block rotates to knock the screen, the screen vibrates to shake off the dust in the screen holes, and the vibration is in the process of reverse blowing, so that the cleaning effect of the screen is better.

[0025] Further, the back of the box side wall is provided with a vertically arranged chute, and the chute is arranged along the width direction of the screen.

[0026] The principle and effect of the present scheme are that the chute is used for positioning and guiding the movement of the air jet plate along the width direction of the screen.

[0027] Further, the end of the chute is provided with a press switch, the air jet plate is used for abutting against the press switch, and the press switch is electrically connected with the controller.

[0028] The principle and effect of the present scheme are that when the air jet plate moves to the end of the chute, the surface air jet plate has cleaned the whole screen, at this time, the air jet plate abuts against the press switch, the controller controls the pipe valve connected with the nozzle and the gas storage chamber to be closed, the gas supply to the nozzle is stopped, and the air jet plate is reset to the initial position under the driving of the reset spring, and the cleaning of the screen is stopped.

[0029] Further, the gas cylinder and the gas storage chamber are both connected with a pressure relief valve through a pipe, the gas cylinder and the gas storage chamber are communicated through a pipe, a third electromagnetic valve is arranged on the pipe connected with the gas storage chamber, a first one-way valve is arranged on the pipe connected with the gas pump and the gas storage chamber, a second one-way valve is arranged on the pipe connected with the air jet plate and the gas storage chamber, and a third one-way valve is arranged on the pipe connected with the nozzle and the gas storage chamber.

[0030] The principle and effect of the present scheme are that the third electromagnetic valve is arranged between the gas cylinder and the gas storage chamber, and the first one-way valve, the second one-way valve and the third one-way valve are arranged on the connecting pipes of the gas pump and the gas storage chamber, the gas storage chamber and the air jet plate, and the gas storage chamber and the nozzle respectively, so that the control of the gas flow is realized. When the dust on the screen needs to be removed, the controller opens the third electromagnetic valve, the gas in the gas cylinder enters the gas storage chamber through the pipe, and is sprayed out through the air jet plate and the nozzle, so as to push the air jet plate to move and drive the fan blades to rotate, and the screen is cleaned comprehensively. Meanwhile, the arrangement of the pressure relief valve ensures that the pressure in the gas cylinder and the gas storage chamber will not be too high. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure diagram of the box-type transformer for photovoltaic power generation Figure 1 ;

[0032] Figure 2 It is a structure diagram of the box-type transformer for photovoltaic power generation Figure 2 ;

[0033] Figure 3 It is a structure diagram of the winding

[0034] Figure 4The utility model discloses a structure schematic drawing of detection assembly and sealing assembly

[0035] Figure 5 The utility model discloses a structure schematic drawing of detection assembly and sealing assembly Figure 1 ;

[0036] Figure 6 The utility model discloses a structure schematic drawing of detection assembly and sealing assembly Figure 2 ;

[0037] Figure 7 The utility model discloses a structure schematic drawing of detection assembly and sealing assembly Figure 3 ;

[0038] Figure 8 The utility model discloses a structure schematic drawing of detection assembly and sealing assembly

[0039] The name of corresponding mark in drawing is: box 1, chute 11, sealing assembly 2, partition 21, towline 22, drive rod 23, driving cone pulley 24, driven cone pulley 25, drive gear 26, detection assembly 3, fan blade 31, cam 32, air pump 33, air cylinder 34, scale pan 35, rack 36, gear 37, support rod 38, cleaning assembly 4, screen 41, air storage chamber 42, air jet plate 43, shower head 44, drive fan blade 45, knock block 46, reset spring 47, press switch 5, transformer 6, winding 61. DETAILED DESCRIPTION

[0040] The utility model will combine embodiment to the conception of the utility model and the technical effect of producing clear, complete description, to fully understand the purpose, feature and effect of the utility model. Obviously, the described embodiment is only a part of embodiment of the utility model, not all embodiment, on the basis of the embodiment of the utility model, the other embodiment that the person skilled in the art obtains without the premise of creative labor, all belong to the scope of the utility model protection:

[0041] Embodiment:

[0042] Please refer to Figures 1-3 A box type transformer for photovoltaic power generation, comprising a box 1, wherein the box 1 is provided with a transformer 6, and the winding 61 of the transformer 6 adopts a back-to-back winding structure (please refer to Figure 3), it is beneficial to change the connection mode with the external bus under the premise of changing the material parameters and technical parameters of the winding, and it is also convenient to connect the external structure of the photovoltaic box transformer. The external modification caused by the change of the outgoing line due to the internal winding can be omitted, which is beneficial to heat dissipation and reduction. The forging is removed to reduce the risk of power failure, enhance the mechanical strength, and facilitate the discovery of problems during maintenance. The existing low-voltage winding of the photovoltaic box transformer is generally double-split, and the winding method is generally two-section type. Based on maintenance and technical improvement reasons, the design methods are different due to different manufacturers, which brings great inconvenience to maintenance and technical improvement. If the winding parameters need to be changed, the winding method and structure need to be changed. Therefore, the winding 61 in the embodiment changes the upper and lower segment winding into back-to-back winding.

[0043] The top of the box body 1 is provided with a cooling device, and the structure thereof can be referred to CN114883109B. The side wall of the box body 1 is provided with a sealing assembly 2, which includes a plurality of partitions 21. Both ends of the partition 21 are rotatably connected with the side wall of the box body 1, and the adjacent partitions 21 are connected through a traction line 22. The gap between the adjacent partitions 21 is smaller than the width of the partition 21. In the initial state, the partition 21 naturally droops, so that the edges of the adjacent partitions 21 overlap each other, forming a continuous sealing surface, thereby realizing sealing. At this time, the wind and sand outside the box body 1 cannot enter the box body 1.

[0044] Please refer to Figures 4-7Also include with the sealing assembly 2 cooperation detection assembly 3, detection assembly 3 includes the fan blade 31, cam 32, air pump 33, cylinder 34 and scale 35, scale 35 is built-in weighing sensor module scale 35, and with zero peel function; Fan blade 31 rotation is provided outside the side wall of the box 1, cam 32 rotation is provided inside the side wall of the box 1, and the same shaft fixed connection with the rotating shaft of the fan blade 31, air pump 33 adopts manual pressing type air pump 33, air pump 33 and cam 32 cooperation setting, cam 32 is used for intermittent collision air pump 33, make air pump 33 produce gas, the air outlet end of air pump 33 is connected with gas storage chamber 42 through pipeline, air pump 33 and gas storage chamber 42 connected pipeline is equipped with the first check valve, gas storage chamber 42 and cylinder 34 are communicated through pipeline, and the cylinder 34 and gas storage chamber 42 connected pipeline is equipped with the third electromagnetic valve, the third electromagnetic valve is electrically connected with the controller, the controller adopts PLC controller, cylinder 34 is connected with pressure relief valve (not shown in the figure) through pipeline, the cylinder body of cylinder 34 is equipped with spring (not shown in the figure), both ends of the spring are fixedly connected with the piston and the inner wall of the cylinder 34, after the pressure relief of cylinder 34, the spring drives the piston rod to retract into the cylinder body of cylinder 34; The piston rod of cylinder 34 is connected with rack 36, the inside of the side wall of box 1 is rotatably connected with gear 37, gear 37 is engaged with rack 36, gear 37 is coaxially fixedly connected with support rod 38, the free end of support rod 38 is fixedly connected with scale 35, scale 35 is electrically connected with the controller, the weighing disc of scale 35 is "U" type structure with open top, avoid the wind sand into the weighing disc is lifted in the weighing time.

[0045] Specific working principle: in the initial state, the piston rod of the cylinder 34 is retracted into the cylinder body. When there is strong wind or storm outside the box, the wind drives the fan blade 31 to rotate, the fan blade 31 drives the cam 32 to rotate circumferentially, thereby impacting the air pump 33, so that the air pump 33 generates gas and supplies gas to the gas storage chamber 42 from the gas outlet. Then the controller controls the third electromagnetic valve to open, so that the gas enters the cylinder 34, thereby driving the piston rod of the cylinder 34 to extend, driving the rack 36 to move, the rack 36 drives the gear 37 to rotate, the gear 37 drives the support rod 38 to rotate, thereby making the scale disc 35 rotate upward, so that the weighing disc opening of the scale disc 35 is upward, and the sand and dust falls into the weighing disc. The weighing time is set to 5 minutes, and the sand and dust is weighed. If it is stormy weather, the sand content in the wind is high, and more sand and stones fall into the scale disc 35, and the scale disc 35 weighs the sand and stones. If the weight exceeds the threshold value, the sealing assembly 2 is in a sealed state to prevent external sand and dust from entering the box body 1. If it is windy weather, that is, the sand content is low, and relatively less sand and stones fall into the scale disc 35, and the weight does not exceed the threshold value in the same time, and the sealing assembly 2 is in an unsealed state, so that the inside and outside of the box body 1 can be ventilated. It should be noted that the scheme detects the sand and dust content in the wind, so as to judge whether to ventilate. In the case of no wind, the above judgment is not needed, and the controller can be used to control the sealing assembly 2 to be in a non-sealed state to realize the ventilation of the box body 1.

[0046] Please refer to 5- Figure 7 Further comprising a driving unit, the driving unit is used for driving a plurality of partitions 21 to rotate, so that adjacent partitions 21 overlap with each other to form a sealing surface; the driving unit comprises a driving rod 23, a driving cone 24 and a driven cone 25, one end of the driving rod 23 is fixedly connected with one of the partitions 21, the free end of the driving rod 23 is coaxially fixedly connected with the driven cone 25, the driving cone 24 is engaged with the driven cone 25, the driving cone 24 is rotatably connected with the side wall of the box body 1, the driving cone 24 is coaxially fixedly connected with a driving gear 26, the driving gear 26 is arranged at the rear end of the gear 37, and the driving gear 26 is arranged in cooperation with the rack 36.

[0047] Specific working principle: if the storm weather is detected, the controller controls the third electromagnetic valve to open, at this time the gas is sprayed from the third electromagnetic valve and will not enter the cylinder 34 again, the cylinder 34 will not drive the rack 36 to continue to move, so that the baffle 21 is in a sealed state in the sandstorm. If the strong wind weather is detected, the controller controls the third electromagnetic valve to close, at this time the gas continues to enter the cylinder 34, so that the piston rod of the cylinder 34 is elongated to the limit position, thereby making the rack 36 move to engage with the driving gear 26, thereby driving the driving gear 26 to rotate, and driving the driving gear 26 to rotate, thereby driving the driven gear 25 to rotate, making the driving rod 23 rotate, and driving one of the baffles 21 to rotate, driving the remaining baffles 21 to rotate in the same direction through the traction coin 22, so that the gaps between the adjacent baffles 21 are generated, forming the ventilation opening, and realizing the ventilation and heat dissipation of the box body 1.

[0048] Please refer to Figure 8 Further comprising a cleaning assembly 4 arranged in the box body 1, the cleaning assembly 4 comprises a screen 41 and a gas storage chamber 42, the screen 41 is arranged on the back of the baffles 21, the gas storage chamber 42 is communicated with the gas outlet of the gas pump 33 through a pipeline, the back of the side wall of the box body 1 is provided with a gas injection plate 43, the gas outlet of the gas injection plate 43 faces the screen 41 and is towards the outside of the box body 1, the gas injection plate 43 is communicated with the gas storage chamber 42 through a pipeline, the pipeline connected between the gas storage chamber 42 and the gas injection plate 43 is provided with a second one-way valve, the pipeline connected between the gas storage chamber 42 and the gas injection plate 43 is provided with a second electromagnetic valve, the second electromagnetic valve is electrically connected with the controller. The gas injection plate 43 is slidingly connected with the back of the side wall of the box body 1, the back of the side wall of the box body 1 is provided with a sliding groove 11 arranged vertically and along the width direction of the screen 41, the gas injection plate 43 is slidingly arranged in the sliding groove 11, the end of the sliding groove 11 is provided with a press switch 5, the gas injection plate 43 is used to abut against the press switch 5, the press switch 5 is electrically connected with the controller; the side wall of the box body 1 is provided with a spray head 44, the spray head 44 is communicated with the gas storage chamber 42 through a pipeline, the pipeline connected between the gas storage chamber 42 and the spray head 44 is provided with a third one-way valve, the gas outlet of the spray head 44 faces the gas injection plate 43, the spray head 44 sprays gas to push the gas injection plate 43 to move, the gas injection plate 43 is connected with a return spring 47, the free end of the return spring 47 is fixedly connected with the back of the side wall of the box body 1. The side of the gas injection plate 43 facing the spray head 44 is rotatably connected with a driving fan blade 45, the driving fan blade 45 is coaxially fixedly connected with a knocking block 46, the knocking block 46 is used to knock the screen 41.

[0049] Specific working principle: through the fan blade 31, air pump 33 and cam 32, the gas storage chamber 42 in the gas pump 33 is stored, when the screen 41 needs to be dusted, the second electromagnetic valve is opened by the controller, the gas in the gas storage chamber 42 enters the air jet plate 43 through the pipeline, so that the air jet plate 43 sprays air, and the air outlet end of the air jet plate 43 faces the screen 41, and faces the outside of the box body 1, so that the dust on the screen 41 is blown to the outside of the box body 1, to dust the screen 41. At the same time, the high-pressure gas in the gas storage chamber 42 is transported to the nozzle 44 through the pipeline, the high-speed airflow sprayed by the nozzle 44 drives the air jet plate 43 to move along the width direction of the screen 41, so as to dust the screen 41 as a whole. The air jet plate 43 is connected with the reset spring 47, when the air jet stops, the reset spring 47 pulls the air jet plate 43 back to the initial position. When the nozzle 44 sprays gas, the driving fan blade 45 rotates, thereby driving the knocking block 46 to rotate, so that the knocking block 46 rotates and knocks the screen 41, the screen 41 vibrates, thereby shaking off the dust in the screen hole of the screen 41, and the vibration is in the process of reverse blowing, the cleaning effect of the screen 41 is better.

[0050] The above is only the embodiment of the present application, and the specific structure and characteristics of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A box-type transformer for photovoltaic power generation, comprising a box (1) provided with a sealing assembly (2), characterized in that, Also include a detection assembly (3) matched with the sealing assembly (2), the detection assembly (3) includes: Fan blade (31), the fan blade (31) is rotatably arranged outside the side wall of the box (1); Cam (32), the cam (32) is rotatably arranged inside the side wall of the box (1), and is fixedly connected with the rotating shaft of the fan blade (31) coaxially; Air pump (33), the air pump (33) is matched with the cam (32); Air cylinder (34), the air cylinder (34) is communicated with the air outlet of the air pump (33) through a pipeline; Scale pan (35), the scale pan (35) is rotatably arranged outside the side wall of the box (1), and the piston rod of the air cylinder (34) is used to drive the scale pan (35) to rotate upward, so that the sand is dropped into the scale pan (35).

2. The box-type transformer for photovoltaic power generation according to claim 1, characterized by: The piston rod of the air cylinder (34) is connected with a rack (36), the side wall of the box (1) is rotatably connected with a gear (37), the gear (37) is engaged with the rack (36), the gear (37) is coaxially fixedly connected with a support rod (38), the free end of the support rod (38) is fixedly connected with the scale pan (35), and the scale pan (35) is electrically connected with a controller; the pipeline connected with the air pump (33) and the air cylinder (34) is provided with a first electromagnetic valve, and the first electromagnetic valve is electrically connected with the controller.

3. The box-type transformer for photovoltaic power generation according to claim 2, characterized by: The sealing assembly (2) includes a plurality of partitions (21), both ends of the partition (21) are rotatably connected with the side wall of the box (1), and adjacent partitions (21) are connected by a traction line (22), the gap between adjacent partitions (21) is less than the width of the partition (21); further including a drive unit, the drive unit is used to drive a plurality of partitions (21) to rotate, so that adjacent partitions (21) overlap each other to form a sealing surface.

4. The box-type transformer for photovoltaic power generation according to claim 3, characterized by: The drive unit includes a drive rod (23), a driving cone (24) and a driven cone (25), one end of the drive rod (23) is fixedly connected with one of the partitions (21), the free end of the drive rod (23) is coaxially fixedly connected with the driven cone (25), the driving cone (24) is engaged with the driven cone (25), the driving cone (24) is rotatably connected with the side wall of the box (1), the driving cone (24) is coaxially fixedly connected with a drive gear (26), the drive gear (26) is arranged at the rear end of the gear (37), and the drive gear (26) is matched with the rack (36).

5. The box-type transformer for photovoltaic power generation according to claim 3, characterized by: Further comprising a cleaning assembly (4) arranged in the box (1), the cleaning assembly (4) comprising a screen (41) arranged at the back of the plurality of partitions (21) and a gas storage chamber (42) in communication with the gas outlet end of the air pump (33) through a pipeline, the back of the side wall of the box (1) being provided with a gas injection plate (43), the gas outlet end of the gas injection plate (43) facing the screen (41) and facing the outside of the box (1), the gas injection plate (43) being in communication with the gas storage chamber (42) through a pipeline, and the pipeline connected between the gas injection plate (43) and the gas storage chamber (42) being provided with a second electromagnetic valve, the second electromagnetic valve being electrically connected with the controller.

6. The box-type transformer for photovoltaic power generation according to claim 5, characterized by: The gas injection plate (43) is slidingly connected with the back of the side wall of the box (1), the side wall of the box (1) being provided with a spray head (44) in communication with the gas storage chamber (42) through a pipeline, the gas outlet end of the spray head (44) facing the gas injection plate (43), the spray head (44) spraying gas to drive the gas injection plate (43) to move, and the gas injection plate (43) being connected with a return spring (47), the free end of the return spring (47) being fixedly connected with the back of the side wall of the box (1).

7. The box-type transformer for photovoltaic power generation according to claim 6, characterized by: The gas injection plate (43) is rotatably connected with a driving fan blade (45) on the side facing the spray head (44), the driving fan blade (45) being coaxially fixedly connected with a knocking block (46), and the knocking block (46) being used for knocking the screen (41).

8. The box-type transformer for photovoltaic power generation according to claim 7, characterized by: The back of the side wall of the box (1) is provided with a vertically arranged sliding groove (11) arranged along the width direction of the screen (41), and the gas injection plate (43) is slidingly arranged in the sliding groove (11).

9. The box-type transformer for photovoltaic power generation according to claim 8, characterized by: The end of the sliding groove (11) is provided with a press switch (5), the gas injection plate (43) being used for abutting against the press switch (5), and the press switch (5) being electrically connected with the controller.

10. The box-type transformer for photovoltaic power generation according to claim 6, characterized by: The gas cylinder (34) and the gas storage chamber (42) are both connected with a pressure relief valve through a pipeline, the gas cylinder (34) and the gas storage chamber (42) being in communication through a pipeline, the pipeline connected between the gas cylinder (34) and the gas storage chamber (42) being provided with a third electromagnetic valve, the pipeline connected between the air pump (33) and the gas storage chamber (42) being provided with a first one-way valve, the pipeline connected between the gas storage chamber (42) and the gas injection plate (43) being provided with a second one-way valve, and the pipeline connected between the gas storage chamber (42) and the spray head (44) being provided with a third one-way valve.

Images