Waterproof distribution box

Abstract

The utility model relates to the technical field of power distribution equipment, in particular to a waterproof power distribution box which comprises a box body, a box cover arranged at the top of the box body and box doors hinged to the two sides of the box body, a plurality of through holes are formed in the bottom end of the box body, and a supporting frame is arranged at the bottom of the box body and horizontally installed in the box body. A floating plate made of light materials is arranged above the supporting frame, the horizontal section of the floating plate is matched with the horizontal section of an inner cavity of the box body, a sealing frame made of elastic materials is arranged above the floating plate and installed on the top face of the floating plate, and a fixing frame is arranged above the sealing frame and horizontally installed on the lower middle portion of the inner cavity of the box body. A plurality of air holes are formed in the portion, between the fixing frame and the supporting frame, of the box body, a water retaining cover with an opening in the bottom end is arranged on the outer sides of the air holes, the water retaining cover is installed on the outer wall of the box body, and a cavity defined by the water retaining cover and the box body is communicated with an inner cavity of the box body through the air holes. The waterproof distribution box provided by the utility model has the advantages of strong waterproof performance and good heat dissipation performance.

Description

A waterproof distribution box Technical Field

[0001] This utility model relates to the field of power distribution equipment technology, specifically to a waterproof power distribution box. Background Technology

[0002] Distribution boxes are key equipment in modern power transmission. Their primary task is to effectively and safely distribute electrical energy to designated downstream distribution equipment, ensuring the rational allocation of power resources. Therefore, distribution boxes are widely used in power supply systems of industrial plants, commercial buildings, and residential buildings. To ensure the safe and stable operation of the power system, strict electrical wiring specifications must be followed, assembling various switching devices, measuring instruments, protective electrical appliances, and auxiliary equipment within the enclosed space formed by the distribution box. A distribution box mainly consists of a box body and a door. The box body creates a closed space, providing a safe environment for the electrical system and ensuring its long-term stable operation. The door allows for easy access to the box, facilitating quick inspection of the electrical system's status by personnel, thus ensuring the efficiency and safety of electrical system maintenance.

[0003] Based on their usage scenarios and functional requirements, distribution boxes are classified into indoor distribution boxes and outdoor distribution boxes. Indoor distribution boxes are mainly suitable for indoor environments such as residences and offices, while outdoor distribution boxes are mainly installed on the exterior of buildings or in open-air locations to meet the special needs of outdoor environments. To prevent rain and other harsh weather from damaging the electrical system, outdoor distribution boxes must have good waterproof performance. However, if the distribution box is designed to be overly sealed simply for waterproofing, it will lead to a decrease in heat dissipation performance. Since the distribution box contains a large number of electrical components, these components generate a lot of heat during long-term operation. Without an effective heat dissipation mechanism, the internal temperature of the distribution box will continue to rise, which will not only affect the normal operation of electrical components but may even lead to overheating damage, thus causing safety hazards. To solve this technical problem, the distribution box has vents that allow air circulation to help dissipate heat. To prevent rainwater from flowing into the distribution box through the vents, a water baffle is installed on the outside of the vents to meet waterproofing requirements. However, even with such a design, outdoor distribution boxes still pose certain risks in environments with heavy rain or poor drainage. In these situations, water may seep into the distribution box through the vents, damaging the electrical system. Therefore, improvements are needed in the waterproofing of distribution boxes. Enhancing the waterproofing while maintaining adequate heat dissipation is crucial to meeting the stringent requirements of outdoor environments. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a waterproof distribution box with strong waterproofing and good heat dissipation, thereby overcoming the defects in existing technologies.

[0005] The technical solution adopted by this utility model is as follows: a waterproof distribution box, including a box body, a box cover set on the top of the box body, and box doors hinged on both sides of the box body. The bottom of the box body has several through holes. A support frame is set at the bottom of the box body. The support frame is horizontally installed inside the box body. A float plate made of lightweight material is set above the support frame. The horizontal cross section of the float plate matches the horizontal cross section of the inner cavity of the box body. A sealing frame made of elastic material is set above the float plate. The sealing frame is installed on the top surface of the float plate. A fixing frame is set above the sealing frame. The fixing frame is horizontally installed in the lower part of the inner cavity of the box body. Several air holes are opened in the box body between the fixing frame and the support frame. A water-blocking cover with an open bottom is set on the outside of the air holes. The water-blocking cover is installed on the outer wall of the box body. The cavity formed by the water-blocking cover and the box body is connected to the inner cavity of the box body through the air holes.

[0006] Preferably, a fixing rod is vertically arranged on one side of the float plate. The fixing rod is located inside the sealing frame. The bottom end of the fixing rod is installed on the top surface of the float plate. A fixing plate is arranged above the fixing rod. The fixing plate is installed on the top surface of the fixing frame. A normally closed push button switch is arranged on the fixing plate. A fixing hole is opened on the fixing plate. The normally closed push button switch is fixedly installed in the fixing hole. The control end of the normally closed push button switch faces the fixing rod.

[0007] Preferably, the fixing rod is movably fitted with a cap with an open bottom, the inner diameter of the cap matching the diameter of the fixing rod, and a spring is installed inside the cap, with the two sides of the spring respectively installed on the bottom plate of the cap and the top of the fixing rod.

[0008] Preferably, a normally open push-button switch and a relay are respectively provided on one side of the normally closed push-button switch. The control terminal of the normally open push-button switch faces the box cover. The normally open push-button switch and the relay are respectively installed on the inner wall of the box. One end of the normally open push-button switch and one end of the relay switch are respectively electrically connected to one end of the normally closed push-button switch. The other end of the normally open push-button switch and the other end of the relay switch are respectively connected to one end of the coil of the relay.

[0009] Preferably, a first guide groove is provided on the top outer side of the sealing frame, the width of the first guide groove gradually increases along the direction away from the floating plate, and a second guide groove is provided on the bottom inner side of the fixed frame, the width of the second guide groove gradually decreases along the direction away from the floating plate, and the second guide groove is located above the first guide groove.

[0010] Preferably, the length of the box cover gradually increases along the direction close to the float plate, the bottom end of the box cover is installed on the top end of the box body, the bottom length of the box cover is not less than the length of the box body, the bottom end of the box cover is provided with several through holes, all of which are located outside the box body, and the through holes are connected to the inner cavity of the box body through the inner cavity of the box cover, and the top of the box body is provided with a sleeve hole, which is located below the box cover.

[0011] Preferably, the opening end of the box body is provided with a second sealing frame, the second sealing frame is an integral structure with the box body, and a sealing ring made of elastic material is interference fitted on the second sealing frame, and the sealing ring is installed on the box door.

[0012] The beneficial effects of this utility model are as follows: First, the air vents arranged on the box body allow for air circulation, thereby improving the heat dissipation effect of the box body. The perforations at the bottom of the box body allow water to flow into the bottom of the box or drain out, thus preventing water accumulation inside the box. Furthermore, the floating plate installed in the box body rises as the water level inside the box increases, causing the sealing frame to rise synchronously. This allows the sealing frame to tightly press against the fixed frame, effectively sealing the box body above the fixed frame and preventing water from flowing into the box body above the fixed frame, thus improving the waterproofness of the box body. It is worth noting that because the air vents are located between the fixed frame and the support frame, even in extreme cases where water flows into the box body through the air vents, this water cannot enter the box body above the fixed frame through the air vents, thus ensuring the reliability of this utility model in terms of waterproofing.

[0013] Secondly, this invention utilizes a fixed rod on the float plate to press the control terminal of the normally closed push-button switch to break the circuit when the water level is too high, thus preventing short circuits in the electrical system caused by water accumulation. The spring and cap prevent excessive pressure on the normally closed push-button switch, improving its stability. Furthermore, this invention forms a circuit protection system with the normally open push-button switch and relay, allowing power to be quickly restored by manually pressing the control terminal of the normally open push-button switch after the normally closed push-button switch has opened, provided it is safe to do so.

[0014] Furthermore, this invention features a first guide groove on the top outer side of the sealing frame and a second guide groove on the bottom inner side of the fixing frame, which guides the sealing frame into the fixing frame, thereby improving the sealing effect on the box above the fixing frame. Additionally, the through hole at the bottom of the box cover allows air circulation at the top of the box, further improving heat dissipation. A sleeve hole at the top of the box allows cables to be inserted into the box to meet power distribution needs. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the structure of this utility model.

[0016] Figure 2 is an enlarged view of point A in Figure 1.

[0017] Figure 3 is a cross-sectional perspective view of the present invention.

[0018] Figure 4 is an enlarged view of point B in Figure 3.

[0019] Figure 5 is an enlarged schematic diagram of point C in Figure 3.

[0020] Figure 6 is an enlarged schematic diagram of point D in Figure 3.

[0021] Figure 7 is an assembly circuit diagram of the normally closed push button switch, normally open push button switch and relay in this utility model.

[0022] Figure 8 is an exploded view of the assembly of the fixing rod, spring and cap in this utility model. Detailed Implementation

[0023] As shown in Figures 1 to 8, a waterproof distribution box includes a box body 1, a box cover 2 on the top of the box body 1, and box doors 3 hinged to both sides of the box body 1. The bottom of the box body 1 has several through holes 4. A support frame 5 is installed at the bottom of the box body 1, horizontally installed inside the box body 1. A floating plate 6 made of lightweight material is installed above the support frame 5. The horizontal cross-section of the floating plate 6 matches the horizontal cross-section of the inner cavity of the box body 1. The bottom surface of the floating plate 6 contacts the bottom surface of the support frame 5, thus restricting the floating plate 6 to only allow upward movement. The float plate 6 moves downwards, and a sealing frame 7 made of elastic material is provided above the float plate 6. The sealing frame 7 is installed on the top surface of the float plate 6. A fixing frame 8 is provided above the sealing frame 7. The fixing frame 8 is horizontally installed in the lower part of the inner cavity of the box body 1. The box body 1 between the fixing frame 8 and the support frame 5 has several air holes 9. A water baffle 10 with an open bottom is provided on the outside of the air holes 9. The water baffle 10 is installed on the outer wall of the box body 1. The cavity formed by the water baffle 10 and the box body 1 is connected to the inner cavity of the box body 1 through the air holes 9. This prevents rainwater from flowing into the enclosure 1 through the vent 9, allowing air inside the enclosure 1 to be expelled or drawn in through the vent, thus meeting the heat dissipation needs of the enclosure 1. When water accumulates where the waterproof distribution box is placed, water flows into the enclosure 1 through the perforation 4. As the water level rises, the float 6 and the sealing frame 7 rise accordingly, causing the sealing frame 7 to press against the fixed frame 8, thereby sealing the enclosure 1 above the fixed frame 8 and preventing water from flowing into the enclosure 1 above the fixed frame 8 through the vent 9, thus improving the waterproofness of the enclosure. When the water level drops, the water inside the enclosure 1 can be drained through the perforation 4.

[0024] In this embodiment, a fixing rod 11 is vertically installed on one side of the float 6. The fixing rod 11 is located inside the sealing frame 7. The bottom end of the fixing rod 11 is installed on the top surface of the float 6. A fixing plate 12 is installed above the fixing rod 11 and is installed on the top surface of the fixing frame 8. A normally closed push button switch 13 is installed on the fixing plate 12. A fixing hole is opened on the fixing plate 12, and the normally closed push button switch 13 is fixedly fitted into the fixing hole. The control end of the normally closed push button switch 13 faces the fixing rod 11. The fixing rod 11 moves up and down with the float 6. As the water level rises, the fixing rod 11 gradually moves towards the normally closed push button switch 13. Therefore, when the water level exceeds the air hole 9, in order to prevent a short circuit in the power supply system inside the box 1, the fixing rod 11 will squeeze the control end of the normally closed push button switch 13, so that the normally closed push button switch 13 is in an open circuit state, thereby disconnecting the power supply system inside the box 1 and avoiding a short circuit.

[0025] Specifically, a cap 14 with a bottom opening is movably fitted onto the fixing rod 11. The inner diameter of the cap 14 matches the diameter of the fixing rod 11. A spring 15 is installed inside the cap 14. The two sides of the spring 15 are respectively installed on the bottom plate of the cap 14 and the top of the fixing rod 11. This buffers the squeezing action of the fixing rod 11 on the normally closed push button switch 13, preventing the normally closed push button switch 13 from being subjected to excessive squeezing action, thereby improving the stability of using the normally closed push button switch 13.

[0026] Please refer again to Figures 1, 3, and 7. A normally open push-button switch 16 and a relay 17 are respectively provided on one side of the normally closed push-button switch 13. The control terminal of the normally open push-button switch 16 faces the cover 2. The normally open push-button switch 16 and the relay 17 are respectively installed on the inner wall of the housing 1. One end of the normally open push-button switch 16 and one end of the switch of the relay 17 are electrically connected to one end of the normally closed push-button switch 13. The other end of the normally open push-button switch 16 and the other end of the switch of the relay 17 are respectively connected to one end of the coil of the relay 17. The other end of the coil of relay 17 and the other end of normally closed push-button switch 13 are respectively connected to the two ends of an external power supply. To prevent excessive current, a fuse F1 is installed between normally open push-button switch 16 and the external power supply. Normally open push-button switch 16 is connected to the external power supply through fuse F1, so that when the current is too high, fuse F1 will break the circuit to protect the circuit. To prevent excessive current flowing through the coil of relay 17, a resistor R is installed between the coil of relay 17 and the external power supply. The coil of relay 17 is connected to an external power supply via resistor R, thus using resistor R to protect relay 17. The power supply system inside housing 1 is connected in parallel with the coil of relay 17 via resistor R, thereby using normally closed push-button switch 13, normally open push-button switch 16, and relay 17 to control the power supply system. When the water level is too high, the fixing rod 11 presses the normally closed push-button switch 13 to open, preventing the coil of relay 17 from engaging the switch of relay 17, i.e., the switch of relay 17 is in the open state; therefore, even if the water recedes, the fixing rod... 11. Stop pressing the normally closed push-button switch 13. Since both the switch of relay 17 and the normally open push-button switch 16 are in the open state, the power supply system is still disconnected. Therefore, it is necessary to have personnel inspect and maintain the power supply system in the enclosure 1 first. After confirming that the power supply system meets the usage requirements, press the normally open push-button switch 16 to supply power to the power supply system and the coil of relay 17. Use the coil of relay 17 to attract the switch of relay 17, so that the switch of relay 17 is in the energized state, so that the power supply can be quickly restored under safe conditions.

[0027] In this embodiment, a first guide groove 18 is provided on the top outer side of the sealing frame 7. The width of the first guide groove 18 gradually increases along the direction away from the float plate 6. A second guide groove 19 is provided on the bottom inner side of the fixed frame 8. The width of the second guide groove 19 gradually decreases along the direction away from the float plate 6. The second guide groove 19 is located above the first guide groove 18, thereby facilitating the insertion of the sealing frame 7 into the fixed frame 8 to improve the sealing effect on the box 1 above the fixed frame 8.

[0028] Specifically, the length of the cover 2 gradually increases along the direction close to the float 6. The bottom end of the cover 2 is installed on the top end of the box body 1. The bottom length of the cover 2 is not less than the length of the box body 1. Several through holes 20 are opened at the bottom end of the cover 2. The through holes 20 are all located outside the box body 1. The through holes 20 are connected to the inner cavity of the box body 1 through the inner cavity of the cover 2. A sleeve hole 21 is opened at the top of the box body 1. The sleeve hole 21 is located below the cover 2. The through holes 20 are used to improve the heat dissipation of the box body 1. The sleeve hole 21 is used to insert cables into the box body 1 to meet the needs of power distribution.

[0029] Please refer to Figures 1, 3, and 6 again. The opening end of the box 1 is provided with a sealing frame 22. The sealing frame 22 is an integral structure with the box 1. A sealing ring 23 made of elastic material is interference fitted on the sealing frame 22. The sealing ring 23 is installed on the box door 3, so as to facilitate sealing of the opening end of the box 1 and improve the airtightness of the box 1.

[0030] The assembly method for this product is as follows: As shown in Figures 1 to 8, firstly, electrically connect one end of the normally open push-button switch 16 and one end of the relay 17 to one end of the normally closed push-button switch 13. Next, connect the other end of the normally open push-button switch 16 and the other end of the relay 17 to one end of the coil of the relay 17, and connect the other end of the coil of the relay 17 to one end of the external power supply through fuse F1. Then, connect the other end of the normally closed push-button switch 13 to the other end of the external power supply through resistor R, and connect the power supply system inside the housing 1 in parallel with the coil of the relay 17 through resistor R. Next, following strict electrical wiring specifications, assemble various switching devices, measuring instruments, protective electrical appliances, and auxiliary equipment inside the housing 1 above the fixed frame 8, so that the power supply system inside the housing 1 is connected in parallel with the coil of the relay 17 through resistor R. Finally, check the wiring of the power supply system to ensure that all components are correctly installed and functioning properly.

[0031] If water accumulates where this product is placed, the water will flow into the housing 1 through the perforation 4. As the water level gradually rises, the float 6 and the sealing frame 7 will rise accordingly. Under the combined guidance of the first guide groove 18 and the second guide groove 19, the top of the sealing frame 7 will insert into the fixed frame 8 to seal the housing 1 above the fixed frame 8, preventing water from flowing into the housing 1 above the fixed frame 8 and improving the housing's waterproofness. At the same time, as the water level continues to rise, the fixing rod 11, the cap 14, and the spring 15 will rise together with the float 6. The cap 14 will apply pressure to the control terminal of the normally closed push-button switch 13, causing the normally closed push-button switch 13 to disconnect the power supply system inside the housing 1 to prevent short circuits caused by water accumulation. When the water level drops, the water inside the housing 1 can be drained through the perforation 4. After the water is drained from the box 1, the inspectors first inspect and maintain the power supply system inside the box 1. After confirming that the power supply system meets the usage requirements, they quickly restore the power supply by pressing the normally open button switch 16 to ensure that the equipment can operate normally.

[0032] In this embodiment, air vents 9 arranged on the housing 1 allow for air circulation, thereby improving the heat dissipation of the housing 1. Perforations 4 at the bottom of the housing 1 allow water to flow into the bottom of the housing 1 or drain out, preventing water accumulation inside the housing 1. Furthermore, the floating plate 6 installed on the housing 1 rises as the water level inside the housing 1 increases, causing the sealing frame 7 to rise synchronously. This allows the sealing frame 7 to tightly press against the fixed frame 8, effectively sealing the housing 1 above the fixed frame 8 and preventing water from flowing into the housing 1 above the fixed frame 8, thus improving the housing's waterproofness. It is worth noting that because the air vents 9 are located between the fixed frame 8 and the support frame 5, even in extreme cases where water flows into the housing 1 through the air vents 9, this water cannot enter the housing 1 above the fixed frame 8 through the air vents 9, ensuring the reliability of this embodiment in terms of waterproofing.

[0033] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A waterproof distribution box, comprising a box body (1), a box cover (2) disposed on the top of the box body (1), and box doors (3) hinged to both sides of the box body (1), characterized in that: The bottom of the box (1) has several perforations (4). A support frame (5) is provided at the bottom of the box (1). The support frame (5) is horizontally installed inside the box (1). A float plate (6) made of lightweight material is provided above the support frame (5). The horizontal cross section of the float plate (6) matches the horizontal cross section of the inner cavity of the box (1). A sealing frame (7) made of elastic material is provided above the float plate (6). The sealing frame (7) is installed on the top surface of the float plate (6) to seal. A fixed frame (8) is provided above the frame 1 (7). The fixed frame (8) is horizontally installed in the lower part of the inner cavity of the box (1). The box (1) between the fixed frame (8) and the support frame (5) has several air holes (9). A water baffle (10) with an open bottom is provided on the outside of the air holes (9). The water baffle (10) is installed on the outer wall of the box (1). The cavity formed by the water baffle (10) and the box (1) is connected to the inner cavity of the box (1) through the air holes (9).

2. The waterproof distribution box according to claim 1, characterized in that: A fixing rod (11) is vertically installed on one side of the float (6). The fixing rod (11) is located inside the sealing frame (7). The bottom end of the fixing rod (11) is installed on the top surface of the float (6). A fixing plate (12) is installed above the fixing rod (11). The fixing plate (12) is installed on the top surface of the fixing frame (8). A normally closed push button switch (13) is installed on the fixing plate (12). A fixing hole is opened on the fixing plate (12). The normally closed push button switch (13) is fixedly fitted in the fixing hole. The control end of the normally closed push button switch (13) faces the fixing rod (11).

3. The waterproof distribution box according to claim 2, characterized in that: The fixing rod (11) is movably fitted with a cap (14) with an open bottom. The inner diameter of the cap (14) matches the diameter of the fixing rod (11). A spring (15) is provided inside the cap (14). The two sides of the spring (15) are respectively installed on the bottom plate of the cap (14) and the top of the fixing rod (11).

4. The weatherproof electrical junction box of claim 2, wherein: A normally closed push button switch (13) is provided with a normally open push button switch (16) and a relay (17) on one side. The control end of the normally open push button switch (16) faces the cover (2). The normally open push button switch (16) and the relay (17) are respectively installed on the inner wall of the box (1). One end of the normally open push button switch (16) and one end of the switch of the relay (17) are respectively electrically connected to one end of the normally closed push button switch (13). The other end of the normally open push button switch (16) and the other end of the switch of the relay (17) are respectively connected to one end of the coil of the relay (17).

5. The weatherproof electrical junction box of claim 1, wherein: The sealing frame (7) has a first guide groove (18) on its top outer side. The width of the first guide groove (18) gradually increases along the direction away from the float (6). The fixed frame (8) has a second guide groove (19) on its bottom inner side. The width of the second guide groove (19) gradually decreases along the direction away from the float (6). The second guide groove (19) is located above the first guide groove (18).

6. The weatherproof electrical junction box of claim 1, wherein: The length of the box cover (2) gradually increases along the direction close to the float (6). The bottom end of the box cover (2) is installed on the top of the box body (1). The bottom length of the box cover (2) is not less than the length of the box body (1). The bottom end of the box cover (2) is provided with several through holes (20). The several through holes (20) are all located outside the box body (1). The through holes (20) are connected to the inner cavity of the box body (1) through the inner cavity of the box cover (2). The top of the box body (1) is provided with a sleeve hole (21). The sleeve hole (21) is located below the box cover (2).

7. The waterproof distribution box according to claim 1, characterized in that: The box (1) has a sealing frame (22) at the opening end. The sealing frame (22) and the box (1) are an integral structure. A sealing ring (23) made of elastic material is fitted on the sealing frame (22) with an interference fit. The sealing ring (23) is installed on the box door (3).

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