A reverse flow protector for power grid energy storage system

Abstract

The present invention relates to the technical field of backflow protectors, and discloses a backflow protector for a power grid energy storage system. It includes a device shell, and also includes: an elastic protective belt, an annular filter cotton belt, a tensioning frame and a dust vibrating frame. A guided self-cleaning module is installed in the device shell. The elastic protective belt is transmission-connected to the guided self-cleaning module. The tensioning frame and the dust vibrating frame are both slidably connected to the device shell. The inner walls of the tensioning frame and the dust vibrating frame are both rotationally connected to two belt rollers. The four belt rollers are transmission-connected to the annular filter cotton belt. A group of tensioning parts and a vibration transmission mechanism are installed between the tensioning frame and the device shell. The vibration transmission mechanism is installed in the device shell. The dust vibrating frame is driven by the vibration transmission mechanism and reciprocates in the device shell. When the present invention is working, on the one hand, it can realize the low humidity and low dust environment maintenance of the device body cavity, and on the other hand, it can realize the efficient self-cleaning of the low humidity and low dust environment maintenance mechanism. At the same time, when the device is working, it can also realize the anti-collision protection of the protector, the self-cleaning of the outer surface, the anti-vibration protection of the electrical components and automatic fire protection.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-backflow protectors for power grid energy storage systems, and in particular to an anti-backflow protector for power grid energy storage systems. Background Art

[0002] The photovoltaic energy storage inverter converts the electricity generated by the photovoltaic power generation system, connects the energy storage battery and the power grid, and stores the surplus electricity of the power generation system through AC / DC bidirectional conversion and control of the charging and discharging process of the energy storage battery. When the electricity is insufficient, it releases the electricity and provides power.

[0003] In the prior art, the patent document with publication number CN216489818U discloses a modular energy storage photovoltaic inverter, including a shell and a heat dissipation component, wherein the bottom inner cavity of the shell is equipped with an inverter and a battery, the upper inner cavity of the shell is provided with a charging slot, the bottom of the charging slot is equipped with a charging connector, the outer walls on both sides of the charging slot are equipped with heat conducting plates, the front surface of the shell is provided with a mounting slot, the heat dissipation component includes a motor and a heat dissipation grille, the motor is installed in the mounting slot, the output end of the motor is equipped with a fan blade, the rear outer wall of the shell is provided with a heat dissipation grille, and the An exhaust cover is installed on the installation groove. The structure of the above-mentioned device is reasonably designed. The heat dissipation component and the heat conductive plate installed on the side wall of the charging groove can dissipate heat for the battery and the mobile power supply to prevent the battery and the mobile power supply from overheating during the charging process. However, the above-mentioned backflow protector is not convenient for maintaining a low-humidity and low-dust environment in the inner cavity of the device body on the one hand, and is not convenient for achieving efficient self-cleaning of the low-humidity and low-dust environment maintaining mechanism on the other hand. At the same time, when the existing backflow protector is working, it is not convenient to achieve the protector's anti-collision protection, external surface self-cleaning, and anti-vibration protection and automatic fire protection of electrical components. Summary of the invention

[0004] The purpose of the present invention is to provide a backflow protection device for a power grid energy storage system, which solves the problem that the existing backflow protection device mentioned in the background technology is not convenient for maintaining a low humidity and low dust environment in the inner cavity of the device body on the one hand, and is not convenient for realizing efficient self-cleaning of the low humidity and low dust environment maintaining mechanism on the other hand. At the same time, when the existing backflow protection device is working, it is not convenient to realize the anti-collision protection of the protector, the self-cleaning of the outer surface, the anti-vibration protection of the electrical components and the automatic fire protection. In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] A backflow protection device for a power grid energy storage system, comprising a housing and:

[0006] An elastic protective belt, an annular filter cotton belt, a tensioning frame and a dust vibrating frame, a guided self-cleaning module is installed in the device shell, the elastic protective belt is transmission-connected to the guided self-cleaning module, the tensioning frame and the dust vibrating frame are both slidably connected to the device shell, the inner walls of the tensioning frame and the dust vibrating frame are both rotationally connected to two belt rollers, the four belt rollers are all transmission-connected to the annular filter cotton belt, and a group of tensioning members are installed between the tensioning frame and the device shell;

[0007] A vibration transmission mechanism is installed in the housing, the dust vibration frame is driven by the vibration transmission mechanism and reciprocates in the housing, and the belt roller is linked with the vibration transmission mechanism;

[0008] A DC ventilation component is installed in the device shell, a dust suppression cavity connected to the DC ventilation component is provided on the top of the device shell, a group of regularly distributed dust suppression spray holes connected to the dust suppression cavity are provided on the top of the device shell, and the air outlet direction of the dust suppression spray holes is vertically downward;

[0009] The dehumidification and drying component is installed in the shell and dehumidifies and dries the ring filter cotton belt;

[0010] The vacuum fireproof component and the electrical mounting component are installed in the device shell, and the inverter body is installed on the electrical mounting component.

[0011] Preferably, the guided self-cleaning module includes four guide rollers that are regularly distributed and rotatably connected to the device shell, the four guide rollers are all transmission-connected to the elastic protective belt, the axis of the guide roller is parallel to the axis of the dust suppression nozzle, and a motor is built into the device shell, and the output shaft end of the motor is transmission-connected to one of the guide rollers.

[0012] Preferably, the guided self-cleaning module also includes a group of brush strips fixed to the back of the device shell, the brush strips are arranged at an angle, and the angle between the brush strips and the horizontal plane is 60°. The brush strips are fitted with an elastic protective belt, the elastic protective belt is made of silicone material, and a nano anti-stick coating is fixedly provided on the surface of the elastic protective belt.

[0013] Preferably, the vibration transmission mechanism includes a motor fixed in the device shell and a half-toothed roller rotatably connected in the device shell, the output shaft end of the motor is fixedly connected to the half-toothed roller, a vertically arranged driven tooth plate is installed on the dust vibration frame, the half-toothed roller is transmission-connected to the driven tooth plate, and a group of elastic reset parts are installed on the bottom surface of the dust vibration frame, and each of the elastic reset parts is fixedly connected to the device shell.

[0014] Preferably, the vibration transmission mechanism also includes a tensioning seat slidably connected to the device shell, a group of tensioning springs are installed between the device shell and the tensioning seat, the tensioning frame is rotatably connected to a tensioning shaft, the tensioning shaft is transmission-connected to a tensioning belt, and the tensioning belt is transmission-connected to a semi-toothed roller and one of the belt rollers respectively.

[0015] Preferably, the DC ventilation component includes a first electric shutter arranged below the dust vibration frame and fixedly connected to the device shell, an air outlet chamber is provided inside the device shell and at a position corresponding to the position above the tensioning frame, the dust suppression chamber is connected to the air outlet chamber, and two symmetrically arranged second electric shutters are provided at the connection point between the dust suppression chamber and the air outlet chamber, and a group of axial flow fans are installed on the tensioning frame and the dust vibration frame and at positions corresponding to the inner side of the annular filter cotton belt.

[0016] Preferably, the dehumidification and drying component includes an air pump fixed on the dust vibrating frame, two clamping rollers rotatably connected to the dust vibrating frame, pressure control channels are opened inside the two clamping rollers, the port of the air pump is connected to a pressure control tube, and an air pressure probe is fixedly provided at the connection point between the air pump and the pressure control tube, the two pressure control channels are rotatably connected to the pressure control tube, an annular clamp bag is fixedly installed on the two clamping rollers, the inner cavities of the two annular clamp bags are connected to the pressure control channels at corresponding positions, a gap adapted to the annular filter cotton belt is fixedly provided between the two annular clamp bags, a group of electric heating rods are rotatably connected to the inner wall of the dust vibrating frame, and each of the electric heating rods is in contact with the annular filter cotton belt.

[0017] Preferably, the electrical mounting component includes an electrical hanging plate, which is connected to the inverter body, a hanging column is installed on the top of the electrical hanging plate, a hanging ball is embedded in the device shell, the hanging ball is fixedly connected to the hanging column, a limit spring is sleeved on the hanging column, a temperature and humidity probe, an oxygen concentration sensor, a smoke sensor and a three-axis acceleration sensor are respectively installed on the electrical hanging plate, a single-chip microcomputer is installed on the device shell, the data ends of the air pressure probe, temperature and humidity probe, oxygen concentration sensor, smoke sensor and three-axis acceleration sensor are all connected to the single-chip microcomputer data, and a group of wire tubes matching the inverter body are installed on the top surface of the device shell.

[0018] Preferably, the vacuum fireproof component includes a vacuum pump installed on the top of the shell, the port of the vacuum pump is connected to the inner cavity of the shell, and dry powder storage boxes are installed on the inner wall of the shell and at positions corresponding to both sides of the electrical hanging board. The dry powder storage boxes are made of foam material and store dry powder fire extinguishing agent.

[0019] Preferably, the tensioning member and the elastic reset member both include a guide rod, the guide rod is fixedly connected to the device housing, and a limit spring is sleeved on the guide rod.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0021] 1. When the present invention is working, on the one hand, it can realize the maintenance of low humidity and low dust environment in the inner cavity of the device body, and on the other hand, it can realize the efficient self-cleaning of the low humidity and low dust environment maintenance mechanism. At the same time, when the present device is working, it can also realize the anti-collision protection of the protector, self-cleaning of the outer surface, anti-vibration protection of the electrical components and automatic fire protection. By realizing the above technical effects, the versatility of the protector and the safety during use are effectively improved.

[0022] 2. In the present invention, when the protector is working, the motor works periodically for a specified period. During the working period of the motor, the elastic protective belt rotates. The silicone material of the elastic protective belt is set so that the elastic protective belt has a certain elastic deformation and elastic self-resetting performance. By achieving the above-mentioned performance, the shell can perform self-buffering and self-diluting of the impact force when subjected to external impact. By achieving the above-mentioned technical effects, the shell has self-protection and self-anti-collision performance. By the inclined setting of the brush strip and the setting of the nano anti-stick coating, the outer surface of the elastic protective belt can be self-cleaned, thereby effectively maintaining the surface cleanliness of the elastic protective belt and the shell.

[0023] 3. In the present invention, when the protector is working, the motor outputs a rotation speed periodically. During the working cycle of the motor, the dust vibration frame can vibrate back and forth within a set stroke through the setting of the half-tooth roller, the driven tooth plate and the elastic reset member. When the dust vibration frame vibrates back and forth, it drives the ring filter cotton belt to move back and forth within the set stroke, and when the ring filter cotton belt moves back and forth, the ring filter cotton belt rotates at a set speed. Through the setting of the vibration state and the rotation state of the ring filter cotton belt, the adhesion rate of ventilation dust on the ring filter cotton belt during ventilation is effectively reduced, thereby reducing the blockage rate of the ring filter cotton belt and maintaining the high filtering performance of the ring filter cotton belt.

[0024] 4. In the present invention, when ventilation operation is performed, the first electric shutter and the second electric shutter are both opened at the maximum ventilated area. After the first electric shutter and the second electric shutter are opened, the two groups of axial flow fans both discharge air upward, thereby realizing DC ventilation and heat dissipation of the electrical components in the device housing. The DC exhaust airflow is finally blown out through the dust suppression nozzles, and the hot air ejected from the dust suppression nozzles ventilates and removes dust from the outer surface of the elastic protective belt.

[0025] 5. In the present invention, when the humidity data in the shell exceeds the set threshold, the electric heating rod performs heating operation. When the electric heating rod performs heating, the interior of the ring clamp bag is sufficiently inflated, so that the ring filter cotton belt can be fully squeezed and dehumidified. Through the squeezing and dehumidification of the ring filter cotton belt, the inverter body can be in a low humidity and low dust environment. Through the setting of the hanging column, the limit spring and the hanging ball, the inverter body has better vibration resistance. When the smoke sensor generates an alarm signal and the temperature in the shell exceeds the set value, the dry powder storage box melts, the dry powder fire extinguishing agent is sprayed out and the automatic fire extinguishing operation is performed. When the smoke sensor generates abnormal data feedback, the vacuum pump maintains the inner cavity of the shell in a vacuum state, thereby effectively preventing the development and spread of the fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a backflow protection device for a power grid energy storage system;

[0027] Figure 2 It is a schematic diagram of the structure of the ring filter cotton belt and the second electric blind;

[0028] Figure 3 for Figure 2 A schematic cross-sectional structure diagram of ;

[0029] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0030] Figure 5 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0031] Figure 6 for Figure 3 A schematic diagram of the local enlarged structure at C in the middle;

[0032] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure at D in the middle;

[0033] Figure 8 It is a structural schematic diagram of the ring filter cotton belt, inverter body and dust vibration frame;

[0034] Fig. 9 It is a schematic diagram of the structure of the dust suppression nozzle and guide roller.

[0035] Among them: 1. housing; 2. elastic protective belt; 3. ring filter cotton belt; 4. tensioning frame; 5. dust vibration frame; 6. belt roller; 7. tensioning piece; 8. dust suppression spray hole; 9. inverter body; 10. guide roller; 11. brush strip; 12. half-tooth roller; 13. driven tooth plate; 14. elastic reset piece; 15. tensioning seat; 16. tensioning spring; 17. tensioning shaft; 18. first electric blinds; 19. second electric Venetian blinds; 20. Axial flow fan; 21. Air pump; 22. Clamp roller; 23. Ring clamp bag; 24. Electric heating rod; 25. Electrical hanging board; 26. Hanging ball; 27. Limit spring; 28. Temperature and humidity probe; 29. ​​Oxygen concentration sensor; 30. Smoke sensor; 31. Three-axis acceleration sensor; 32. Single chip microcomputer; 33. Wire tube; 34. Vacuum pump; 35. Dry powder storage box; 36. Dust suppression chamber. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-9 , a backflow protection device for a power grid energy storage system, comprising a housing 1, and further comprising:

[0038] The elastic protective belt 2, the ring filter cotton belt 3, the tension frame 4 and the dust vibration frame 5, the housing 1 is equipped with a guided self-cleaning module, and the elastic protective belt 2 is drivingly connected with the guided self-cleaning module;

[0039] The guided self-cleaning module includes four regularly distributed guide rollers 10 that are rotatably connected to the housing 1. The four guide rollers 10 are all connected to the elastic belt 2 in a transmission manner. The axis of the guide roller 10 is parallel to the axis of the dust suppression nozzle 8. The housing 1 has a built-in motor, and the output shaft end of the motor is connected to a guide roller 10 in a transmission manner.

[0040] The guided self-cleaning module also includes a set of brush strips 11 fixed to the back of the housing 1. The brush strips 11 are arranged obliquely, and the angle between the brush strips 11 and the horizontal plane is 60°.

[0041] The brush strip 11 is fitted with the elastic protective belt 2, the elastic protective belt 2 is made of silicone material, and a nano anti-stick coating is fixedly provided on the surface of the elastic protective belt 2;

[0042] When the protector is working, the motor works periodically for a specified period. During the working period of the motor, the elastic belt 2 rotates. The elastic belt 2 is made of silicone material, so that the elastic belt 2 has certain elastic deformation and elastic self-reset performance. By achieving the above performance, the housing 1 can perform self-buffering and self-diluting of the impact force when it is impacted by the outside. By achieving the above technical effect, the housing 1 has self-protection and self-anti-collision performance.

[0043] By setting the brush strip 11 obliquely and the nano-anti-stick coating, the outer surface of the elastic belt 2 can be self-cleaned, thereby effectively maintaining the surface cleanliness of the elastic belt 2 and the housing 1;

[0044] The tensioning frame 4 and the dust vibration frame 5 are both slidably connected to the housing 1;

[0045] The tensioning frame 4 is arranged above the dust vibration frame 5;

[0046] The inner walls of the tension frame 4 and the dust vibration frame 5 are rotatably connected to two belt rollers 6, and the axis of the belt roller 6 is perpendicular to the axis of the guide roller 10;

[0047] The four belt rollers 6 are all connected to the ring filter cotton belt 3 in a transmission manner, and a group of tensioning members 7 are installed between the tensioning frame 4 and the housing 1;

[0048] By setting the tensioning frame 4 and the tensioning member 7, the ring filter cotton belt 3 is kept in a continuously tensioned state during operation;

[0049] The ring filter cotton belt 3 is made of cotton material. Through the setting of the cotton material of the ring filter cotton belt 3, on the one hand, the ventilation airflow can be filtered and purified, and on the other hand, the ventilation airflow can be filtered and dehumidified;

[0050] A vibration transmission mechanism is installed in the housing 1, and the dust vibration frame 5 is driven by the vibration transmission mechanism and reciprocates in the housing 1, and a belt roller 6 is linked with the vibration transmission mechanism;

[0051] The vibration transmission mechanism includes a motor fixed in the device shell 1 and a half-toothed roller 12 rotatably connected to the device shell 1, the output shaft end of the motor is fixedly connected to the half-toothed roller 12, a vertically arranged driven tooth plate 13 is installed on the dust vibration frame 5, the half-toothed roller 12 is transmission-connected to the driven tooth plate 13, and a group of elastic reset parts 14 are installed on the bottom surface of the dust vibration frame 5, and each elastic reset part 14 is fixedly connected to the device shell 1.

[0052] The tensioning member 7 and the elastic reset member 14 both include a guide rod, which is fixedly connected to the housing 1 and on which a limit spring 27 is sleeved;

[0053] The vibration transmission mechanism also includes a tensioning seat 15 which is slidably connected to the device housing 1. A group of tensioning springs 16 are installed between the device housing 1 and the tensioning seat 15. A tensioning shaft 17 is rotatably connected to the tensioning frame 4. The tensioning shaft 17 is transmission-connected to a tensioning belt. The tensioning belt is transmission-connected to the semi-toothed roller 12 and a belt roller 6 respectively.

[0054] When the protector is working, the motor outputs a rotation speed periodically. During the working cycle of the motor, the dust vibrating frame 5 can reciprocate within the set stroke through the arrangement of the semi-toothed roller 12, the driven toothed plate 13 and the elastic reset member 14. When the dust vibrating frame 5 reciprocates, the ring filter cotton belt 3 is driven to reciprocate within the set stroke.

[0055] When the ring filter cotton belt 3 reciprocates, the ring filter cotton belt 3 rotates at a set speed, and the vibration state and the rotation state of the ring filter cotton belt 3 are set, thereby effectively reducing the adhesion rate of ventilation dust on the ring filter cotton belt 3 during ventilation, thereby reducing the blockage rate of the ring filter cotton belt 3 and maintaining the high filtering performance of the ring filter cotton belt 3;

[0056] A DC ventilation component is installed in the housing 1. A dust suppression chamber 36 connected to the DC ventilation component is provided on the top of the housing 1. A group of regularly distributed dust suppression spray holes 8 connected to the dust suppression chamber 36 are provided on the top of the housing 1. The air outlet direction of the dust suppression spray holes 8 is vertically downward.

[0057] The DC ventilation component includes a first electric shutter 18 arranged below the dust vibration frame 5 and fixedly connected to the housing 1, an air outlet cavity is arranged inside the housing 1 and at a position corresponding to the position above the tensioning frame 4, the dust suppression cavity 36 is connected to the air outlet cavity, and two symmetrically arranged second electric shutters 19 are arranged at the connection between the dust suppression cavity 36 and the air outlet cavity, and a group of axial flow fans 20 are installed on the tensioning frame 4 and the dust vibration frame 5 and at positions corresponding to the inner side of the ring filter cotton belt 3;

[0058] When ventilation is performed, the first electric shutter 18 and the second electric shutter 19 are both opened at the maximum ventilated area. After the first electric shutter 18 and the second electric shutter 19 are opened, the two sets of axial flow fans 20 both discharge air upward, thereby realizing DC ventilation and heat dissipation of the electrical components in the housing 1.

[0059] The direct current exhaust airflow is finally blown out through the dust suppression nozzle 8, and the hot air sprayed through the dust suppression nozzle 8 ventilates and removes dust from the outer surface of the elastic protective belt 2;

[0060] The dehumidification and drying component is installed in the housing 1 and dehumidifies and dries the ring filter cotton belt 3;

[0061] The dehumidification and drying component includes an air pump 21 fixed on the dust vibration frame 5, and two clamping rollers 22 rotatably connected to the dust vibration frame 5. The two clamping rollers 22 are provided with pressure control channels inside. The port of the air pump 21 is connected with a pressure control tube. A pressure probe is fixedly arranged at the connection point between the air pump 21 and the pressure control tube. The two pressure control channels are rotatably connected with the pressure control tube. Ring clamp capsules 23 are fixedly installed on the two clamping rollers 22. The inner cavities of the two ring clamp capsules 23 are connected with the pressure control channels at corresponding positions. A gap adapted to the ring filter cotton belt 3 is fixedly arranged between the two ring clamp capsules 23. A group of electric heating rods 24 are rotatably connected to the inner wall of the dust vibration frame 5, and each electric heating rod 24 is fitted with the ring filter cotton belt 3.

[0062] When the humidity data in the housing 1 exceeds the set threshold, the electric heating rod 24 performs heating operation. When the electric heating rod 24 performs heating, the inside of the ring clamp bag 23 is sufficiently inflated, so that the ring filter cotton belt 3 can be fully squeezed and dehumidified;

[0063] The ring filter cotton belt 3 is squeezed to remove moisture, so that the inverter body 9 can be in a low humidity and low dust environment;

[0064] The vacuum fireproof component and the electrical mounting component are installed in the device housing 1, and the inverter body 9 is installed on the electrical mounting component.

[0065] The electrical mounting components include an electrical hanging plate 25, which is connected to the inverter body 9. A hanging column is installed on the top of the electrical hanging plate 25. A hanging ball 26 is embedded in the device shell 1. The hanging ball 26 is fixedly connected to the hanging column. A limit spring 27 is sleeved on the hanging column. A temperature and humidity probe 28, an oxygen concentration sensor 29, a smoke sensor 30 and a three-axis acceleration sensor 31 are respectively installed on the electrical hanging plate 25. A single-chip microcomputer 32 is installed on the device shell 1. The data ends of the air pressure probe, the temperature and humidity probe 28, the oxygen concentration sensor 29, the smoke sensor 30 and the three-axis acceleration sensor 31 are all connected to the single-chip microcomputer 32. A group of wire tubes 33 cooperating with the inverter body 9 are installed on the top surface of the device shell 1.

[0066] The wire tube 33 is used for the access of the cables and is connected to the inverter body 9, so as to provide anti-backflow protection for the grid energy storage system;

[0067] By setting the suspension column, the limit spring 27 and the suspension ball 26, the inverter body 9 has better anti-vibration performance;

[0068] By setting up the temperature and humidity probe 28, the oxygen concentration sensor 29, the smoke sensor 30 and the three-axis acceleration sensor 31, multiple environmental data of the inverter body 9 can be monitored in real time;

[0069] The temperature and humidity probe 28, oxygen concentration sensor 29, smoke sensor 30 and triaxial acceleration sensor 31 can be customized or selected according to actual needs;

[0070] When the single chip microcomputer 32 detects that the feedback data of the three-axis acceleration sensor 31 exceeds the set value, the single chip microcomputer 32 automatically sounds and lights an alarm;

[0071] The vacuum fire-proof component includes a vacuum pump 34 installed on the top of the shell 1. The port of the vacuum pump 34 is connected to the inner cavity of the shell 1. Dry powder storage boxes 35 are installed on the inner wall of the shell 1 and at positions corresponding to both sides of the electrical hanging plate 25. The dry powder storage boxes 35 are made of foam material and store dry powder fire extinguishing agent.

[0072] When the smoke sensor 30 generates an alarm signal and the temperature inside the shell 1 exceeds the set value, the dry powder storage box 35 melts, the dry powder fire extinguishing agent is sprayed out and automatic fire extinguishing operation is performed, and when the smoke sensor 30 generates abnormal data feedback, the vacuum pump 34 maintains the inner cavity of the shell 1 in a vacuum state, thereby effectively preventing the development and spread of fire.

[0073] The working principle of the present invention is: when the protector is working, the motor works periodically for a specified period. During the working cycle of the motor, the elastic protective belt 2 rotates. The silicone material of the elastic protective belt 2 is set so that the elastic protective belt 2 has a certain elastic deformation and elastic self-resetting performance. Through the realization of the above-mentioned performance, the shell 1 can perform self-buffering and self-diluting of the impact force when subjected to external impact. Through the realization of the above-mentioned technical effects, the shell 1 has self-protection and self-anti-collision performance. Through the inclined setting of the brush strip 11 and the setting of the nano anti-stick coating, the self-cleaning of the outer surface of the elastic protective belt 2 is achieved, and then the surface cleanliness of the elastic protective belt 2 and the shell 1 is effectively maintained. When the protector is working, the motor periodically outputs a rotation speed. During the working cycle of the motor, through the setting of the semi-tooth roller 12, the driven tooth plate 13 and the elastic reset member 14, the dust vibration frame 5 can When the dust vibration frame 5 vibrates reciprocatingly, it drives the annular filter cotton belt 3 to move reciprocatingly within the set stroke, and when the annular filter cotton belt 3 moves reciprocatingly, the annular filter cotton belt 3 rotates at a set speed, and the vibration state and rotation state of the annular filter cotton belt 3 are set, thereby effectively reducing the adhesion rate of ventilation dust on the annular filter cotton belt 3 during ventilation, thereby reducing the blockage rate of the annular filter cotton belt 3 and maintaining the high filtering performance of the annular filter cotton belt 3. When ventilation operation is performed, the first electric shutter 18 and the second electric shutter 19 are both opened at the maximum ventilation area. After the first electric shutter 18 and the second electric shutter 19 are opened, the two groups of axial flow fans 20 both discharge air upward, thereby realizing DC ventilation and heat dissipation of the electrical components in the device shell 1, and the DC exhaust airflow is finally blown out through the dust suppression nozzle 8, and the hot air sprayed through the dust suppression nozzle 8 ventilates and removes dust on the outer surface of the elastic protective belt 2.

[0074] When the humidity data in the device shell 1 exceeds the set threshold, the electric heating rod 24 performs a heating operation. When the electric heating rod 24 performs heating, the interior of the ring clamp bag 23 is sufficiently inflated, so that the ring filter cotton belt 3 can be fully squeezed and dehumidified. Through the squeezing and dehumidification of the ring filter cotton belt 3, the inverter body 9 can be in a low humidity and low dust environment. Through the setting of the suspension column, the limit spring 27 and the suspension ball 26, the inverter body 9 has better vibration resistance. When the smoke sensor 30 generates an alarm signal and the temperature in the device shell 1 exceeds the set value, the dry powder storage box 35 melts, the dry powder fire extinguishing agent is sprayed out and an automatic fire extinguishing operation is performed. When the smoke sensor 30 generates abnormal data feedback, the vacuum pump 34 maintains the inner cavity of the device shell 1 in a vacuum state, thereby effectively preventing the development and spread of the fire.

[0075] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A backflow protection device for a power grid energy storage system, comprising a housing (1), characterized in that: Also includes: An elastic protective belt (2), an annular filter cotton belt (3), a tensioning frame (4) and a dust vibrating frame (5), wherein a guided self-cleaning module is installed in the device shell (1), the elastic protective belt (2) is drivingly connected to the guided self-cleaning module, the tensioning frame (4) and the dust vibrating frame (5) are both slidably connected to the device shell (1), the inner walls of the tensioning frame (4) and the dust vibrating frame (5) are both rotatably connected to two belt rollers (6), the four belt rollers (6) are all drivingly connected to the annular filter cotton belt (3), and a group of tensioning members (7) are installed between the tensioning frame (4) and the device shell (1); A vibration transmission mechanism is installed in the housing (1), the dust vibration frame (5) is driven by the vibration transmission mechanism and reciprocates in the housing (1), and the belt roller (6) is linked to the vibration transmission mechanism; The vibration transmission mechanism comprises a motor fixed in the housing (1) and a semi-toothed roller (12) rotatably connected to the housing (1), the output shaft end of the motor being fixedly connected to the semi-toothed roller (12), a vertically arranged driven toothed plate (13) being mounted on the dust vibration frame (5), the semi-toothed roller (12) being transmission-connected to the driven toothed plate (13), and a group of elastic reset members (14) being mounted on the bottom surface of the dust vibration frame (5), each of the elastic reset members (14) being fixedly connected to the housing (1); A DC ventilation component is installed in the housing (1), the top of the housing (1) is provided with a dust suppression chamber (36) connected to the DC ventilation component, the top of the housing (1) is provided with a group of regularly distributed dust suppression holes (8) connected to the dust suppression chamber (36), the air outlet direction of the dust suppression holes (8) is vertically downward; A dehumidification and drying component is installed in the housing (1) and performs dehumidification and drying on the ring filter cotton belt (3); The dehumidification and drying component comprises an air pump (21) fixed on the dust vibration frame (5), and two clamping rollers (22) rotatably connected to the dust vibration frame (5), the two clamping rollers (22) are provided with pressure control channels inside, the port of the air pump (21) is connected with a pressure control tube, and a pressure probe is fixedly arranged at the connection point between the air pump (21) and the pressure control tube, the two pressure control channels are rotatably connected with the pressure control tube, the two clamping rollers (22) are fixedly mounted with an annular clamp capsule (23), the inner cavities of the two annular clamp capsules (23) are connected with the pressure control channels at corresponding positions, a gap adapted to the annular filter cotton belt (3) is fixedly arranged between the two annular clamp capsules (23), and the inner wall of the dust vibration frame (5) is rotatably connected with a group of electric heating rods (24), and each of the electric heating rods (24) is in contact with the annular filter cotton belt (3); A vacuum fireproof component and an electrical mounting component are installed in the device housing (1), and an inverter body (9) is installed on the electrical mounting component.

2. The anti-backflow protector of a power grid energy storage system according to claim 1, characterized in that: The guided self-cleaning module comprises four regularly distributed guide rollers (10) which are rotatably connected to the housing (1); the four guide rollers (10) are all transmission-connected to the elastic protective belt (2); the axes of the guide rollers (10) are parallel to the axes of the dust suppression nozzles (8); a motor is built into the housing (1); the output shaft end of the motor is transmission-connected to one of the guide rollers (10).

3. The anti-backflow protector of a power grid energy storage system according to claim 2, characterized in that: The guided self-cleaning module further comprises a group of brush strips (11) fixed to the back of the housing (1); the brush strips (11) are arranged in an inclined manner; the angle between the brush strips (11) and the horizontal plane is 60 degrees; the brush strips (11) are fitted with an elastic protective belt (2); the elastic protective belt (2) is made of silicone material; and a nano anti-stick coating is fixedly provided on the surface of the elastic protective belt (2).

4. The anti-backflow protector of a power grid energy storage system according to claim 1, characterized in that: The vibration transmission mechanism also includes a tensioning seat (15) slidably connected to the device housing (1), a group of tensioning springs (16) are installed between the device housing (1) and the tensioning seat (15), a tensioning shaft (17) is rotatably connected to the tensioning frame (4), and a tensioning belt is transmission-connected to the tensioning shaft (17), and the tensioning belt is transmission-connected to the semi-toothed roller (12) and one of the belt rollers (6), respectively.

5. The anti-backflow protector of a power grid energy storage system according to claim 1, characterized in that: The DC ventilation component comprises a first electric shutter (18) arranged below the dust vibration frame (5) and fixedly connected to the housing (1); an air outlet chamber is arranged inside the housing (1) and at a position corresponding to the position above the tensioning frame (4); the dust suppression chamber (36) is connected to the air outlet chamber; two symmetrically arranged second electric shutters (19) are arranged at the connection point between the dust suppression chamber (36) and the air outlet chamber; and a group of axial flow fans (20) are installed on the tensioning frame (4) and the dust vibration frame (5) and at positions corresponding to the inner side of the ring filter cotton belt (3).

6. The anti-backflow protector of a power grid energy storage system according to claim 5, characterized in that: The electrical mounting component comprises an electrical mounting plate (25), the electrical mounting plate (25) being connected to the inverter body (9), a hanging column being installed at the top of the electrical mounting plate (25), a hanging ball (26) being embedded in the device housing (1), the hanging ball (26) being fixedly connected to the hanging column, a limit spring (27) being sleeved on the hanging column, a temperature and humidity probe (28), an oxygen concentration sensor (29), a smoke sensor (30) and a three-axis acceleration sensor (31) being respectively installed on the electrical mounting plate (25), a single-chip microcomputer (32) being installed on the device housing (1), data ends of the air pressure probe, the temperature and humidity probe (28), the oxygen concentration sensor (29), the smoke sensor (30) and the three-axis acceleration sensor (31) being data-connected to the single-chip microcomputer (32), and a group of wire tubes (33) cooperating with the inverter body (9) being installed on the top surface of the device housing (1).

7. The anti-backflow protector of a power grid energy storage system according to claim 6, characterized in that: The vacuum fireproof component comprises a vacuum pump (34) installed on the top of the shell (1), a port of the vacuum pump (34) being in communication with the inner cavity of the shell (1), and a dry powder storage box (35) being installed on the inner wall of the shell (1) and at positions corresponding to both sides of the electrical hanging plate (25), the dry powder storage box (35) being made of foam material, and storing dry powder fire extinguishing agent in the dry powder storage box (35).

8. The anti-backflow protector of a power grid energy storage system according to claim 1, characterized in that: The tensioning member (7) and the elastic reset member (14) both comprise a guide rod, the guide rod being fixedly connected to the housing (1), and the guide rod being sleeved with a limit spring (27).

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