A port shore power frequency conversion power supply power connection box protection device

Abstract

The present application relates to the technical field of port shore power equipment protection, in particular to a kind of port shore power frequency conversion power supply electricity connection box protection device, the present application includes box and its outside protective cover, motor one, bevel gear, pulley, two-way screw rod of being equipped with transmission mechanism on protective cover, linkage sliding frame on baffle realizes the automatic opening and closing of heat dissipation hole, protective cover is equipped with sensor component monitoring environment and equipment temperature, its outside is equipped with installation groove and filter plate, positioning block is realized filter plate quick disassembly and positioning by motor two, box front end is equipped with box door with handle, middle box door is equipped with display screen and emergency stop button;The present application realizes the dynamic balance of heat dissipation and protection, protection component tool-free quick disassembly, adapt to the complex working conditions of port high salt fog, high dust, improve the stability and safety of electricity connection box operation.

Description

Technical Field

[0001] This invention relates to the field of protection technology for port shore power equipment, and in particular to a protection device for a port shore power frequency converter junction box. Background Technology

[0002] Port shore power frequency converter junction boxes are the core terminal equipment of port ship shore power supply systems. They are responsible for the transfer, distribution, and regulation of shore power frequency converters and are widely used in various dock ship berthing areas. Currently, these devices are deployed in the port's outdoor environment for extended periods, facing natural conditions such as high salt spray, high dust levels, and sudden changes in temperature and humidity. They are also susceptible to interference from sea winds, waves, and vibrations from dock machinery operations. The frequency converter components inside the junction boxes have high environmental requirements, and the balance between heat dissipation efficiency and dust and moisture protection directly affects the equipment's service life and the continuity of shore power supply. Therefore, configuring suitable protective devices to achieve dynamic regulation of heat dissipation and protection, as well as convenient maintenance of protective components, has become an important direction for the research and development of port shore power equipment.

[0003] Existing technologies include publicly available patents related to the protection of shore power boxes in ports, such as the authorized announcement number CN213460807U "A Shore Power Box with Protective Plate for Easy Ventilation and Heat Dissipation" and the announcement number CN221263007U "Port Shore Power Protection Box". Although these patents have achieved basic protection and ventilation and heat dissipation of shore power boxes, they still have many technical defects. The heat dissipation and protection switching of existing technologies mostly rely on manual operation, and there is no automatic opening and closing heat dissipation hole control mechanism, so it is impossible to dynamically adjust according to the temperature inside the box; the filter and drying components used for protection do not have a dedicated quick positioning and disassembly structure, and maintenance requires the use of tools, resulting in low work efficiency; and there is a lack of integrated environmental sensor monitoring components and no linkage mechanical actuator, so it is impossible to automatically trigger the protection action. The fixing method of some protective structures is not stable enough in the strong wind environment of the port, making it difficult to meet the refined protection needs of the complex working conditions of the port. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a protective device for port shore power frequency converter junction boxes. It solves the problems of existing port shore power box protection technologies that rely heavily on manual operation to switch between heat dissipation and protection, lack automatic opening and closing mechanisms for heat dissipation holes with temperature linkage, lack tool-free quick disassembly and positioning structures for protective filter components, lack integrated environmental monitoring components and linkage mechanical actuators, and have poor stability in strong wind environments in ports. It is unable to adapt to the complex working conditions and refined protection requirements of ports with high salt spray, high dust, and sudden changes in temperature and humidity.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a protective device for a port shore power frequency converter junction box, comprising a box body, a protective cover fixedly connected to the outer side of the box body, a protective shell fixedly connected to the upper center of the protective cover, a motor fixedly connected inside the protective shell, a drive box fixedly connected to the inner center of the protective cover, a bevel gear two disposed through the output end of the motor one through the drive box one, a rotating rod rotatably connected laterally to the inner side of the drive box one, a bevel gear one fixedly connected to the portion of the rotating rod located inside the drive box one, the bevel gear one and the bevel gear two meshing with each other; a pulley one fixedly connected to both ends of the outer side of the rotating rod, a rotating shaft rotatably connected to both ends of the inner side of the protective cover, and a pulley one fixedly connected to the rotating shaft. There is a second pulley, and a belt is fitted on both pulleys. A fourth pulley is fixedly connected to the rotating shaft. A bidirectional screw is correspondingly provided at the lower end of the rotating shaft. Both bidirectional screws are rotatably connected inside the protective cover. A third pulley is fixedly connected to one end of the first bidirectional screw. A second belt is fitted on both pulleys. Two threaded blocks are threaded on the first bidirectional screw. A connecting shaft is fixedly connected to the lower end of the threaded blocks. A connecting rod is rotatably connected to the connecting shaft. A baffle is rotatably connected to the other end of the connecting rod. Several heat dissipation holes are opened through both ends of the housing. The heat dissipation holes correspond to the baffles. A sliding frame is fixedly connected to both ends of the outer side of the housing. The baffle is slidably connected inside the sliding frame.

[0006] As an improvement of the present invention, the front end of the box is hinged with three boxes, and each of the three boxes is equipped with a handle.

[0007] As a further improvement of the present invention, a display screen is installed on the middle door, and an emergency stop button is provided below the display screen.

[0008] As a further improvement of the present invention, a mounting plate is fixedly connected to one outer end of the protective cover, and a sensor assembly is mounted on the mounting plate.

[0009] As a further improvement of the present invention, the outer ends of the protective cover are provided with mounting grooves, the interior of the mounting grooves are provided with filter plates, and the upper ends of the filter plates are provided with positioning grooves.

[0010] As a further improvement of the present invention, slots are provided at both ends of the inner side of the protective cover, a drive box two is fixedly connected to the middle of the inner side of the slots, and a motor two is fixedly connected to the outer end of the drive box two.

[0011] As a further improvement of the present invention, a bevel gear four is provided through the output end of the motor two and extends into the drive box two. A bidirectional screw two is rotatably connected to the inner side of the drive box two. A bevel gear three is fixedly connected to the part of the bidirectional screw two located inside the drive box two. The bevel gear three and the bevel gear four mesh with each other.

[0012] As a further improvement of the present invention, the outer end of the bidirectional screw has two positioning blocks in thread engagement. The positioning blocks are disposed through the inside of the mounting groove and are slidably connected in the groove, and the positioning blocks correspond to the positioning groove.

[0013] This invention utilizes a multi-stage transmission mechanism consisting of a bevel gear, pulley, and bidirectional screw driven by a motor. This mechanism, along with a baffle on the sliding frame, automatically opens and closes the heat dissipation holes. Combined with dual signals from sensor components and internal temperature monitoring, it intelligently triggers either heat dissipation or protective actions, precisely achieving a dynamic balance between heat dissipation and protection. This effectively solves the problems of insufficient heat dissipation at high temperatures and the intrusion of impurities and moisture in high humidity and dust conditions caused by fixed heat dissipation holes in existing technologies. It is suitable for the complex working conditions of ports with high salt spray and rapid temperature and humidity changes, fully protecting the frequency converter components inside the box and improving the operational stability and service life of the power supply box. Furthermore, the bevel gear and bidirectional screw mechanism driven by a second motor drive the positioning block, enabling quick snap-fit ​​positioning and disassembly of the filter plates without the need for tools. This significantly improves the efficiency of replacing and cleaning the protective components, meeting the protection requirements of dusty environments in ports. The multi-door design at the front of the box facilitates the regional maintenance of internal components. The display screen can monitor equipment operating parameters in real time, and the emergency stop button can quickly cut off power in case of a malfunction. The overall structure features reliable transmission and a compact layout, balancing the convenience of protective component maintenance with the safety of equipment operation, and is highly adaptable to the actual needs of outdoor operations in ports. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a protective device for a port shore power frequency converter junction box proposed in this invention. Figure 2 This is a cross-sectional view of a protective device for a port shore power frequency converter junction box proposed in this invention. Figure 3 This is a top view of a protective device for a port shore power frequency converter junction box proposed in this invention. Figure 4 This is a schematic diagram of the filter plate installation of a protective device for a port shore power frequency converter junction box proposed in this invention. Figure 5 This is a schematic diagram of the internal structure of the drive box of a port shore power frequency converter junction box protection device proposed in this invention. Figure 6 This is a schematic diagram of the interior of the drive box 2 of the port shore power frequency converter junction box protection device proposed in this invention. The attached diagram shows the following components: 1. Housing; 2. Emergency stop button; 3. Motor 1; 4. Protective shell; 5. Protective cover; 6. Door; 7. Handle; 8. Display screen; 9. Drive box 1; 10. Rotating shaft; 11. Rotating rod; 12. Pulley 1; 13. Belt 1; 14. Pulley 2; 15. Sliding frame; 16. Heat dissipation hole; 17. Baffle; 18. Connecting rod; 19. Connecting shaft; 20. Threaded block; 21. Double-acting screw 1; 22. Pulley 3; 23. Pulley 4; 24. Positioning block; 25. Mounting slot; 26. Slot; 27. Filter plate; 28. Positioning slot; 29. ​​Motor 2; 30. Drive box 2; 31. Sensor assembly; 32. Mounting plate; 33. Bevel gear 1; 34. Bevel gear 2; 35. Bevel gear 3; 36. Bevel gear 4; 37. Double-acting screw 2; 38. Belt 2. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1 to 6 As shown, a protective device for a port shore power frequency converter junction box according to the present invention includes a box body 1. A protective cover 5 is fixedly connected to the outside of the box body 1. A protective shell 4 is fixedly connected to the upper center of the protective cover 5. A motor 3 is fixedly connected inside the protective shell 4. A drive box 9 is fixedly connected to the inner center of the protective cover 5. A bevel gear 34 is provided through the output end of the motor 3 through the drive box 9. A rotating rod 11 is rotatably connected to the inner side of the drive box 9. A bevel gear 33 is fixedly connected to the part of the rotating rod 11 located inside the drive box 9. The bevel gear 33 and the bevel gear 34 mesh with each other. Pulleys 12 are fixedly connected to both ends of the outer side of the rotating rod 11.

[0017] In this invention, the inner ends of the protective cover 5 are rotatably connected to a rotating shaft 10. A second pulley 14 is fixedly connected to the rotating shaft 10. A belt 13 is fitted on the first pulley 12 and the second pulley 14. A fourth pulley 23 is also fixedly connected to the rotating shaft 10. A bidirectional screw 21 is correspondingly provided at the lower end of the rotating shaft 10. Both bidirectional screws 21 are rotatably connected inside the protective cover 5. A third pulley 22 is fixedly connected to one end of the bidirectional screw 21. A second belt 38 is fitted on the third pulley 22 and the fourth pulley 23. Two threaded blocks 20 are threadedly engaged on the bidirectional screw 21. A connecting shaft 19 is fixedly connected to the lower end of the threaded blocks 20. A connecting rod 18 is rotatably connected to the connecting shaft 19. A baffle 17 is rotatably connected to the other end of the connecting rod 18. Several heat dissipation holes 16 are opened through both ends of the housing 1. The heat dissipation holes 16 correspond to the baffle 17.

[0018] In this invention, sliding frames 15 are fixedly connected to both ends of the outer side of the housing 1, and baffles 17 are slidably connected inside the sliding frames 15. The housing 1 is the core supporting and protective body of the port shore power frequency converter connection component. The protective cover 5 fixed on its outer side forms a double-layer protective structure, which can effectively resist collisions, dust and salt spray corrosion in the port environment. The protective shell 4 seals and protects the motor 3 to prevent the motor 3 from being damaged by the external environment. The drive box 9 provides installation and transmission space for the bevel gear 33 and the bevel gear 34. The output end of motor 3 drives bevel gear 34 to rotate. Through the meshing transmission of bevel gear 33 and bevel gear 34, the vertical rotational power is converted into the horizontal rotational power of the rotating rod 11. When the rotating rod 11 rotates, it drives the pulleys 12 at both ends to rotate synchronously. Through the transmission of belt 13, it drives pulley 14 and rotating shaft 10 to rotate. The rotating shaft 10 then drives pulley 22 and double screw 21 to rotate through pulley 23 and belt 38, realizing the multi-stage transmission of power from motor 3 to double screw 21.

[0019] In this invention, the bidirectional screw 21 adopts a forward and reverse thread design. Its rotation can drive two threaded blocks 20 to move synchronously towards or away from each other. The threaded blocks 20 drive the connecting rod 18 to swing angle through the connecting shaft 19, thereby pulling or pushing the baffle 17 to slide vertically along the sliding frame 15. The sliding frame 15 provides precise sliding guidance and limit for the baffle 17, ensuring the precise correspondence between the baffle 17 and the heat dissipation hole 16. When the baffle 17 slides upward, the heat dissipation hole 16 is exposed to achieve heat dissipation inside the box 1. When it slides downward, the heat dissipation hole 16 is blocked to achieve dust and moisture protection for the electrical components inside the box 1. The entire structure achieves automatic opening and closing of the heat dissipation hole 16 through mechanical transmission, which is suitable for the dynamic protection requirements of port shore power connection boxes.

[0020] In this invention, the front end of the housing 1 is hinged with three doors 6, each with a handle 7. The three doors 6 are hinged to the front end of the housing 1 and can be opened independently or as a whole, adapting to the inspection, operation and maintenance needs of electrical components in different areas inside the housing 1. The handles 7 are made of non-slip and wear-resistant material, making it easy for port workers to open the doors 6 in humid and dusty working environments, improving the convenience and stability of operation. At the same time, a sealing strip is set at the hinge between the door 6 and the housing 1, which can enhance the sealing and protection effect of the housing 1 and prevent external moisture and dust from entering.

[0021] In this invention, a display screen 8 is installed on the middle door 6, and an emergency stop button 2 is located below the display screen 8. The display screen 8 is embedded and flush with the door 6 to avoid damage from external impacts. It can display information such as temperature, humidity, circuit operating parameters, and power connection status inside the enclosure 1 in real time, facilitating remote observation and on-site monitoring by staff. The emergency stop button 2 has a raised design and a protective cover to prevent accidental activation. In case of emergency such as circuit failure, abnormal temperature, or short circuit inside the enclosure 1, staff can quickly press the emergency stop button 2 to cut off the power supply to the device, disconnecting the power supply path of the shore power frequency converter, effectively preventing safety accidents and improving the safety of device operation. In this invention, a mounting plate 32 is fixedly connected to one side of the protective cover 5. A sensor assembly 31 is mounted on the mounting plate 32. The mounting plate 32 provides a stable mounting base for the sensor assembly 31. It is fixed to the protective cover 5 by welding to ensure connection strength and adapt to the windy working environment of the port. The sensor assembly 31 integrates a temperature and humidity sensor and a wind force sensor, which can monitor the temperature, humidity and wind force of the external environment of the port in real time. At the same time, a temperature sensor is installed inside the housing 1. The external sensor assembly 31 and the internal temperature sensor form a dual monitoring system. The monitored signals are transmitted to the control module of the device to provide accurate signal basis for the opening and closing of the heat dissipation hole 16 and the replacement of the protective components, so as to realize the intelligent protection of the device.

[0022] In this invention, mounting grooves 25 are provided at both ends of the outer side of the protective cover 5. Filter plates 27 are installed inside the mounting grooves 25. Positioning grooves 28 are provided at both ends of the upper part of the filter plates 27. The mounting grooves 25 are horizontally opened along both ends of the outer side of the protective cover 5, and their dimensions are adapted to the filter plates 27. The filter plates 27 are detachably installed inside the mounting grooves 25. The filter plates 27 have a multi-layer dustproof filter structure, which can effectively filter dust, particulate matter, salt particles in sea fog, and other impurities in the port environment, preventing impurities from entering the housing 1 through the heat dissipation holes 16, causing wear, short circuits, and corrosion of electrical components. The positioning grooves 28 are rectangular groove structures, and their opening positions precisely correspond to the subsequent positioning blocks 24, providing a matching structure for the rapid positioning and fixing of the filter plates 27, and preventing the filter plates 27 from falling out of the mounting grooves 25 in strong wind conditions in the port.

[0023] In this invention, the inner sides of the protective cover 5 are provided with slots 26 at both ends. A drive box 30 is fixedly connected to the middle of the inner side of the slot 26, and a motor 29 is fixedly connected to the outer end of the drive box 30. The slot 26 is connected to the mounting slot 25, and its width is adapted to the positioning block 24, providing space for the lateral sliding of the positioning block 24. The drive box 30 is fixed to the middle of the inner side of the slot 26 with bolts, providing installation and transmission space for the subsequent bevel gear and bidirectional screw 37, while protecting the internal transmission components to prevent dust and moisture from entering and affecting the transmission accuracy. The motor 29 is a servo motor, which is connected to the drive box 30 by a flange, with good sealing performance. The motor 29 provides power for the positioning and disassembly of the filter plate 27, and can achieve precise forward and reverse rotation to ensure the precise movement of the positioning block 24.

[0024] In this invention, the output end of motor 29 passes through drive housing 30 and is provided with bevel gear 4 36. A bidirectional screw 2 37 is laterally rotatably connected to the inner side of drive housing 30. A bevel gear 35 is fixedly connected to the inner portion of the bidirectional screw 2 37 within drive housing 30. The bevel gear 35 meshes with bevel gear 4 36. The output end of motor 29 passes through the side wall of drive housing 30 and is fixedly connected to bevel gear 4 36. The bidirectional screw 2 37 inside drive housing 30 is laterally rotatably connected via bearings. The inner part of the second housing 30 is fixedly connected to the third bevel gear 35. The third bevel gear 35 and the fourth bevel gear 36 mesh with each other, converting the vertical rotational power of the output end of the second motor 29 into the horizontal rotational power of the bidirectional screw 2 37. This bevel gear transmission pair has high transmission efficiency and high transmission accuracy, which can ensure the smooth rotation of the bidirectional screw 2 37 and provide stable power support for the subsequent movement of the positioning block 24. At the same time, the drive housing 2 30 can effectively avoid interference between the third bevel gear 35, the fourth bevel gear 36 and external components, ensuring the stability of the transmission.

[0025] In this invention, the outer end of the bidirectional screw 37 is threaded with two positioning blocks 24. The positioning blocks 24 penetrate the interior of the mounting groove 25 and are slidably connected in the slot 26. The positioning blocks 24 correspond to the positioning slots 28. The bidirectional screw 37 also adopts a forward and reverse thread design, with the two positioning blocks 24 at its outer end respectively engaging with the forward and reverse threads. Rotation of the bidirectional screw 37 can drive the two positioning blocks 24 to move synchronously towards or away from each other. The positioning blocks 24 extend through the slot 26 into the interior of the mounting groove 25 and are slidably connected to the slot 26. The slot 26 provides precise guidance and limitation for the lateral sliding of the positioning blocks 24. The positioning block 24 is positioned to prevent it from shifting when sliding. The size and shape of the positioning block 24 are fully adapted to the positioning groove 28. When the positioning block 24 moves outwards, its end is inserted into the positioning groove 28, realizing the quick engagement and fixation of the filter plate 27 inside the mounting groove 25. When the positioning block 24 moves inwards, its end is disengaged from the positioning groove 28, and the operator can directly pull the filter plate 27 out of the mounting groove 25, realizing the quick disassembly of the filter plate 27, which is convenient for cleaning and replacing the filter plate 27. The filter plate 27 can also be replaced with other protective components such as drying components according to the port environment requirements, improving the adaptability of the device.

[0026] In this invention, during use, the operator installs the device at a port location. A wiring hole is provided at the rear end of the housing 1 to ensure stable power connection. The sensor assembly 31 installed on the outside of the protective cover 5 includes a temperature and humidity sensor and a wind force sensor. Similarly, a temperature sensor is also installed inside the housing 1. The two temperature sensors monitor the internal and external temperatures. When the internal temperature of the housing 1 is too high, the motor 3 at the top starts, driving the bevel gear 34 to rotate. Under meshing action, the bevel gear 33 and the rotating rod 11 rotate. At this time, the pulleys 12 at both ends are driven by the belt 13. The device drives the rotating shaft 10, pulley 14, and pulley 23 to rotate. Finally, under the transmission of belt 38, it drives pulley 22 and double screw 21 to rotate. Then, under the action of the threaded engagement, the two threaded blocks 20 gradually move outward. Driven by the connecting rod 18, the baffle 17 moves upward, exposing the heat dissipation holes 16 at both ends, completing the heat dissipation work of the electrical components inside the housing 1, improving the heat dissipation effect and protection effect of the device. When the internal temperature is not high, the baffle 17 moves downward again to block the heat dissipation holes 16, thereby protecting the internal electrical components.

[0027] In this invention, an installation groove 25 is provided on the outside of the protective cover 5 to install the filter plate 27. The filter plate 27 can achieve the filtering effect and prevent external dust from entering the interior of the housing 1. Secondly, when the humidity sensor detects that the external humidity is high, a drying component can also be installed inside the installation groove 25 to achieve the drying effect. During installation, the filter plate 27 is aligned with the installation groove 25, and the motor 29 is started to drive the bevel gear 4 36 to rotate. Under the meshing action, the bevel gear 35 and the double-acting screw 2 37 can be driven to rotate. Under the action of the threaded engagement, the two positioning blocks 24 move outward and enter the interior of the positioning groove 28 to complete the quick snap-fit ​​installation of the filter plate 27.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A protective device for a port shore power frequency converter junction box, comprising a box body, characterized in that: It also includes a protective cover connected to the housing, a protective shell connected to the protective cover, a motor and a drive housing connected inside the protective shell, a bevel gear two disposed through the output end of the motor and extending inward through the drive housing, a rotating rod rotatably connected laterally to the inner side of the drive housing, the rotating rod being located inside the drive housing and connected to the bevel gear one, the bevel gear one and the bevel gear two meshing with each other; a pulley one is connected to the rotating rod, a rotating shaft is rotatably connected inside the protective cover, a pulley two is connected to the rotating shaft, and a belt one is fitted on both pulley one and pulley two; the rotating shaft... The shaft is also connected to a pulley four. A bidirectional screw one is correspondingly provided at the lower end of the shaft. The bidirectional screw one is rotatably connected inside the protective cover. A pulley three is connected to the bidirectional screw one. A belt two is fitted on both the pulley three and the pulley four. The bidirectional screw one has two threaded blocks that are threaded together. A connecting shaft is connected to the threaded blocks. A connecting rod is connected to the connecting shaft. A baffle is connected to the connecting rod. Several heat dissipation holes are opened through both ends of the housing. The heat dissipation holes correspond to the baffles. A sliding frame is also connected to the housing. The baffle is slidably connected inside the sliding frame.

2. The protective device for a port shore power frequency converter junction box according to claim 1, characterized in that: The box body has three hinged doors, and each of the three doors is equipped with a handle.

3. The protective device for a port shore power frequency converter junction box according to claim 2, characterized in that: A display screen is installed on the middle door, and an emergency stop button is located below the display screen.

4. The protective device for a port shore power frequency converter junction box according to claim 1, characterized in that: A mounting plate is connected to the protective cover, and a sensor assembly is mounted on the mounting plate.

5. A protective device for a port shore power frequency converter junction box according to claim 1, characterized in that: The protective cover has mounting grooves at both ends, and a filter plate is installed in the mounting groove. The filter plate has positioning grooves at both ends.

6. A protective device for a port shore power frequency converter junction box according to claim 5, characterized in that: The protective cover also has a slot, and a second drive box is connected to the slot. A second motor is connected to the second drive box.

7. A protective device for a port shore power frequency converter junction box according to claim 6, characterized in that: The output end of the motor 2 is provided with a bevel gear 4 through the drive box 2. A bidirectional screw 2 is rotatably connected to the drive box 2. The bidirectional screw 2 is located in the drive box 2 and is connected to a bevel gear 3. The bevel gear 3 and the bevel gear 4 mesh with each other.

8. A protective device for a port shore power frequency converter junction box according to claim 7, characterized in that: The bidirectional screw has two threaded connections and two positioning blocks. The positioning blocks are disposed through the mounting groove and slidably connected in the groove, and the positioning blocks correspond to the positioning groove.

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