Outdoor power distribution cabinet sealing structure with waterproof air bag

Abstract

This utility model relates to the field of electrical distribution cabinet sealing technology, specifically, to a sealing structure for an outdoor electrical distribution cabinet with a waterproof airbag. It includes a cabinet body with an opening on one side, an airbag fixedly installed around the opening, and an air-inflating assembly on one side of the cabinet body. The air-inflating assembly includes a protective box fixedly installed on the cabinet body, and a piston cylinder fixedly installed inside the protective box. In this utility model, when the cabinet door is closed, a cranking handle drives a reciprocating mechanism, causing a half-gear to drive a rack and slider in linear motion. A push-pull rod pushes a piston plate to reciprocate within the piston cylinder. This action draws in external air through a second one-way valve and forces it into the airbag through a first one-way valve, causing it to expand and tightly fill the gap between the cabinet door and the cabinet body. This inflation action allows the sealing structure to adapt to gap changes caused by temperature differences or slight deformation, thus achieving a superior and more durable waterproof and dustproof effect compared to traditional fixed sealing strips.

Description

Technical Field

[0001] This utility model relates to the field of electrical distribution cabinet sealing technology, specifically to an outdoor electrical distribution cabinet sealing structure with a waterproof airbag. Background Technology

[0002] Distribution cabinets are key equipment in power systems used to install electrical components such as circuit breakers, disconnect switches, and protection devices. When a distribution cabinet only contains switches and is used in dusty and humid environments, such as seafood processing plants or seafood markets, the high humidity, moisture, and dust can affect the lifespan of the switches. Since switches generate little heat during operation, distribution cabinets used in these environments should have a fully enclosed structure to ensure strict waterproofing and moisture resistance. A reliable seal between the cabinet body and the door is crucial to prevent the intrusion of external contaminants such as rainwater, moisture, and dust, ensuring the safe and stable operation of the internal switches and extending their lifespan.

[0003] However, the fixed rubber sealing strips commonly used in existing technologies have defects: under harsh conditions such as high external temperature and large temperature difference, the rubber material is prone to aging during long-term use, resulting in a decrease in its elasticity or even hardening. At the same time, long-term opening and closing operations or slight collisions can also easily cause structural deformation of the cabinet door. All of these will cause gaps that cannot be sealed between the fixed sealing strip and the contact surface of the cabinet door, eventually leading to a gradual loss of sealing performance.

[0004] More importantly, the deterioration of the sealing condition is often a latent defect, which is difficult to judge directly from the outside. Routine inspections are usually limited to observing the appearance of the sealing strip, and cannot accurately assess its actual compression state or tightness of fit. Even if the cabinet door is opened for detailed inspection, it is impossible to find out whether the cabinet door and the rubber sealing strip are tightly fitted. At the same time, because the power distribution cabinet contains high voltage, the power must be disconnected and isolated before opening the door to ensure personnel safety. This process is not only complicated and affects the continuity of power supply, but also damages the original sealing interface, introducing new sealing hazards into the inspection itself. Therefore, existing methods are difficult to achieve efficient and non-invasive preventive maintenance. Once the seal failure is not detected in time, it will increase the risk of internal switches getting damp, resulting in safety hazards and economic losses. Summary of the Invention

[0005] The purpose of this utility model is to provide a sealing structure for an outdoor power distribution cabinet with a waterproof airbag, so as to solve the problems mentioned in the background art above: In harsh outdoor environments, seasonal temperature differences can cause thermal expansion and contraction of the cabinet and cabinet door. Long-term opening and closing operations or slight impacts can also easily cause structural deformation, leading to seal failure.

[0006] To address the above problems, the present invention aims to provide a sealing structure for an outdoor power distribution cabinet with a waterproof airbag. The structure includes a cabinet with an opening on one side. An airbag is embedded and fixedly installed around the opening of the cabinet. An air-inflating assembly is provided on one side of the cabinet. The air-inflating assembly includes a protective box fixedly installed on the cabinet. A piston cylinder is fixedly installed inside the protective box. A first one-way valve is fixedly installed on the side of the piston cylinder near the airbag. The other end of the first one-way valve is fixedly connected to the airbag via a connecting pipe. A pressure gauge is fixedly installed on the connecting pipe. A piston plate is slidably installed inside the piston cylinder. A second one-way valve is fixedly installed at the top of the piston cylinder between the piston plate and the first one-way valve. A push-pull rod is fixedly installed on the side of the piston plate away from the first one-way valve. The other end of the push-pull rod extends to the outside of the piston cylinder and is provided with a reciprocating mechanism. The reciprocating mechanism is used to drive the push-pull rod to move back and forth.

[0007] As a further improvement to this technical solution, a cabinet door is hinged to the side of the cabinet near the opening. When the cabinet door is closed, the airbag contacts the side of the cabinet door near the cabinet opening.

[0008] As a further improvement to this technical solution, the reciprocating mechanism also includes a guide rail fixedly installed on the inner wall of the protective box, a slider horizontally slidably installed on the guide rail, and the end of the push-pull rod away from the piston plate is fixedly connected to the slider.

[0009] As a further improvement to this technical solution, a rotating shaft is rotatably installed on the inner wall of the protective box, a half gear is fixedly installed on the rotating shaft, and a rack is fixedly installed on the lower side wall of the slider, the rack meshing with the half gear.

[0010] As a further improvement to this technical solution, an extension rod is fixedly installed on the rotating shaft, and a handle is hinged to the other end of the extension rod.

[0011] As a further improvement to this technical solution, the first check valve only allows air inside the piston cylinder to flow into the connecting pipe, and the second check valve only allows external air to enter the interior of the piston cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This outdoor electrical distribution cabinet sealing structure with a waterproof airbag works by using a reciprocating mechanism driven by a crank handle when the cabinet door is closed. This mechanism causes a half-gear to drive a rack and slider in linear motion, which in turn pushes a piston plate to reciprocate within the piston cylinder via a push-pull rod. This action draws in external air through a second one-way valve and forces it into the airbag through a first one-way valve, causing it to expand and tightly fill the gap between the cabinet door and the cabinet body. This inflation action allows the sealing structure to adapt to gap changes caused by temperature differences or slight deformation, thus achieving a superior and more durable waterproof and dustproof effect compared to traditional fixed sealing strips.

[0013] This outdoor power distribution cabinet with a waterproof airbag has a sealed structure that integrates pressure monitoring and maintenance interfaces into an external protective box. Checking the pressure status does not require opening the power distribution cabinet door; inspectors only need to open the protective box cover to directly observe the pressure gauge reading. If the pressure is insufficient, the air inflator can be operated directly to replenish the air. This design externalizes the reading and maintenance of critical status information, enabling daily inspections without power outages, without damaging the seal, and without safety risks, ensuring long-term reliability of the sealing performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural schematic diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the air inflator and airbag assembly of this utility model. Figure 4 This is a partial structural schematic diagram of the air-inflating component of this utility model; Figure 5 This is a cross-sectional view of the air-inflating component of this utility model.

[0015] The meanings of the labels in the diagram are as follows: 1. Cabinet body; 2. Cabinet door; 3. Air inflator assembly; 31. Protective housing; 32. Piston cylinder; 33. First check valve; 34. Connecting pipe; 35. Pressure gauge; 36. Second check valve; 37. Push-pull rod; 371. Piston plate; 38. Reciprocating mechanism; 381. Guide rail; 382. Slider; 383. Rack; 384. Rotating shaft; 385. Half gear; 386. Extension rod; 387. Handle; 4. Airbags. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0017] Please see Figures 1-3As shown, the purpose of this embodiment is to provide a sealing structure for an outdoor power distribution cabinet with a waterproof airbag, including a cabinet body 1 with an opening on one side. An airbag 4 made of silicone rubber is embedded and fixedly installed around the opening of the cabinet body 1. The silicone rubber material has excellent aging resistance and elasticity retention, which can extend the service life of the airbag 4. An air inflation component 3 is provided on one side of the cabinet body 1, and the inspection personnel can inflate the airbag 4 through the air inflation component 3.

[0018] Cabinet 1 is hinged to a cabinet door 2 on the side near the opening. A lock is installed on the cabinet door 2 away from the hinge axis. When the cabinet door 2 is closed and fixed to the cabinet 1 by the lock, the cabinet door 2 blocks the opening of the cabinet 1. The airbag 4 contacts the side of the cabinet door 2 near the opening of the cabinet 1. At this time, air is injected into the airbag 4 through the air inflator 3, causing it to expand and tightly fill the gap between the cabinet door 2 and the cabinet 1. The inflated airbag 4 can adapt to the gap changes caused by outdoor temperature fluctuations or slight collision deformation, and automatically compensate for the gaps. Compared with traditional fixed sealing strips, it has better and more durable waterproof and dustproof performance.

[0019] The structure of the air pump component 3 is described in detail below, with reference to... Figure 4 and Figure 5 The air inflator assembly 3 includes a protective box 31 fixedly installed on the cabinet 1. A piston cylinder 32 is fixedly installed inside the protective box 31. A first one-way valve 33 is fixedly installed on the side of the piston cylinder 32 near the airbag 4. The other end of the first one-way valve 33 is fixedly connected to the airbag 4 through a connecting pipe 34. The first one-way valve 33 only allows air from the piston cylinder 32 to flow into the connecting pipe 34. A pressure gauge 35 is fixedly installed on the connecting pipe 34. The pressure gauge 35 is used to monitor the internal air pressure of the airbag 4. A piston plate 371 is slidably installed inside the piston cylinder 32. A second one-way valve 36 is fixedly installed on the top of the piston cylinder 32 between the piston plate 371 and the first one-way valve 33. The second one-way valve 36 only allows external air to enter the interior of the piston cylinder 32. A push-pull rod 37 is fixedly installed on the side of the piston plate 371 away from the first one-way valve 33. The other end of the push-pull rod 37 extends to the outside of the piston cylinder 32 and is provided with a reciprocating mechanism 38. The reciprocating mechanism 38 is used to drive the push-pull rod 37 to move back and forth.

[0020] The structure of the reciprocating mechanism 38 is described in detail below. The reciprocating mechanism 38 also includes a guide rail 381 fixedly installed on the inner wall of the protective box 31. A slider 382 is horizontally slidably installed on the guide rail 381. The end of the push-pull rod 37 away from the piston plate 371 is fixedly connected to the slider 382. A rotating shaft 384 is rotatably installed on the inner wall of the protective box 31. A half gear 385 is fixedly installed on the rotating shaft 384. A rack 383 is fixedly installed on the lower side wall of the slider 382. The rack 383 meshes with the half gear 385. An extension rod 386 is fixedly installed on the rotating shaft 384. The rotating shaft 384 is installed on the extension rod 386 at a position away from the half gear 385. A handle 387 is hinged to the other end of the extension rod 386.

[0021] The workflow is as follows: When the inspector holds the handle 387 and rotates the extension rod 386 back and forth, the extension rod 386 drives the rotating shaft 384 to rotate, and the rotating shaft 384 drives the half gear 385 to rotate. Through the meshing transmission between the half gear 385 and the rack 383, the rack 383 drives the slider 382 to move back and forth along the guide rail 381. The slider 382 drives the piston plate 371 to move inside the piston cylinder 32 through the push-pull rod 37. When the piston plate 371 moves away from the first one-way valve 33, the space inside the piston cylinder 32 between the piston plate 371 and the first one-way valve 33 increases, forming a negative pressure. External air enters the interior of the piston cylinder 32 through the second one-way valve 36. When the piston plate 371 approaches the first one-way valve 33, the space inside the piston cylinder 32 between the piston plate 371 and the first one-way valve 33 decreases. The air in this space is compressed and then enters the interior of the connecting pipe 34 through the first one-way valve 33, and finally is injected into the airbag 4 to inflate it. Pressure gauge 35 displays the air pressure inside airbag 4 in real time. When the pressure reaches the set value, stop shaking handle 387 to avoid damage to airbag 4 due to over-inflation.

[0022] Compared to solutions that require inspectors to carry external air pumps or air cylinders, this air inflation component 3 has the following advantages: it eliminates the inability to replenish air in emergencies due to forgetting, damage, or incompatible tool interfaces, ensuring the timeliness and reliability of maintenance work.

[0023] To protect the air pump assembly 3, the protective box 31 is provided with an opening on the side away from the cabinet 1, and a box cover is hinged to the protective box 31. When the air pump assembly 3 is not in operation, the box cover is closed, and the box cover blocks the opening of the protective box 31, so that the air pump assembly 3 is protected from external collision damage.

[0024] The maintenance advantages of this embodiment are as follows: the inspection personnel only need to open the cover of the protective box 31 to directly read the value of the pressure gauge 35 to judge the sealing status of the airbag 4. If the pressure inside the airbag 4 is lower than the set value due to temperature drop or natural leakage, the air can be replenished directly by using the handle 387 on the cabinet 1. There is no need to find, prepare and connect an external air source, which simplifies the process and improves efficiency. The whole process does not require powering off the power distribution cabinet or opening the cabinet door 2, avoiding sealing damage and safety risks introduced by inspection, realizing efficient and safe preventive maintenance, and ensuring long-term reliability of sealing performance.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for an outdoor power distribution cabinet with a waterproof airbag, comprising a cabinet body (1) with an opening on one side, characterized in that: An airbag (4) is embedded and fixedly installed around the opening of the cabinet (1). An air-inflating assembly (3) is provided on one side of the cabinet (1). The air-inflating assembly (3) includes a protective box (31) fixedly installed on the cabinet (1). A piston cylinder (32) is fixedly installed inside the protective box (31). A first one-way valve (33) is fixedly installed on the side of the piston cylinder (32) near the airbag (4). The other end of the first one-way valve (33) is fixedly connected to the airbag (4) through a connecting pipe (34). A fixed device is installed on the connecting pipe (34). A pressure gauge (35) is installed inside the piston cylinder (32), and a piston plate (371) is slidably installed inside the piston cylinder (32). A second check valve (36) is fixedly installed on the top of the piston cylinder (32) between the piston plate (371) and the first check valve (33). A push-pull rod (37) is fixedly installed on the side of the piston plate (371) away from the first check valve (33). The other end of the push-pull rod (37) extends to the outside of the piston cylinder (32) and is provided with a reciprocating mechanism (38). The reciprocating mechanism (38) is used to drive the push-pull rod (37) to move back and forth.

2. The sealing structure of the outdoor power distribution cabinet with waterproof airbag according to claim 1, characterized in that: The cabinet (1) is hinged to a cabinet door (2) on the side near the opening. When the cabinet door (2) is closed, the airbag (4) contacts the side of the cabinet door (2) near the opening of the cabinet (1).

3. The sealing structure of the outdoor power distribution cabinet with waterproof airbag according to claim 1, characterized in that: The reciprocating mechanism (38) also includes a guide rail (381) fixedly installed on the inner wall of the protective box (31), a slider (382) is horizontally slidably installed on the guide rail (381), and the end of the push-pull rod (37) away from the piston plate (371) is fixedly connected to the slider (382).

4. The sealing structure of the outdoor power distribution cabinet with waterproof airbag according to claim 3, characterized in that: The inner wall of the protective box (31) is rotatably mounted with a rotating shaft (384), and a half gear (385) is fixedly mounted on the rotating shaft (384). A rack (383) is fixedly mounted on the lower side wall of the slider (382), and the rack (383) meshes with the half gear (385).

5. The sealing structure of the outdoor power distribution cabinet with waterproof airbag according to claim 4, characterized in that: An extension rod (386) is fixedly installed on the rotating shaft (384), and a handle (387) is hinged to the other end of the extension rod (386).

6. The sealing structure of the outdoor power distribution cabinet with waterproof airbag according to claim 1, characterized in that: The first check valve (33) allows air inside the piston cylinder (32) to flow into the connecting pipe (34), while the second check valve (36) allows external air to enter the interior of the piston cylinder (32).

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