Protective device for building electromechanical box

Abstract

This invention relates to the field of power equipment protection technology, specifically disclosing a protective device for building equipment boxes. The device includes a box body with a hinged door on the front side. A ventilation structure is embedded in the upper part of one side of the box body, and a dehumidification and moisture-proof structure is located below this side. The dehumidification and moisture-proof structure includes a moisture-absorbing component, a cover chamber, a fan, and a shielding component. The moisture-absorbing component is located on the lower side of the box body, with a cover chamber fixed to its top. A fan is locked and fixed inside the cover chamber, and a shielding component for opening or closing the cover chamber opening is locked and fixed at the top. This invention achieves controllable heat dissipation through the ventilation structure and active moisture adsorption and discharge through the dehumidification and moisture-proof structure. The combined operation of these two components solves the problem of simultaneously achieving heat dissipation and moisture protection in building equipment boxes. Furthermore, the moisture-absorbing material is regenerated in situ through heating with an electric heating plate, eliminating the need for frequent manual replacement. This invention offers advantages such as high automation, low maintenance costs, and good protective effect.

Description

Technical Field

[0001] This invention relates to the field of power equipment protection technology, specifically a protective device for building equipment boxes. Background Technology

[0002] Building equipment boxes, as the core equipment for building power distribution and control, are usually installed in complex environments such as corridors, equipment rooms or exterior walls. They integrate various electrical components such as circuit breakers, contactors, and terminal blocks, which have strict requirements for the temperature and humidity of the working environment.

[0003] Existing building equipment box protection devices mainly adopt two structural forms: one is a fully enclosed box, which can effectively prevent dust and moisture from entering, but the heat generated by electrical components during operation is not easily dissipated in time, causing the internal temperature to rise continuously, accelerating the aging of component insulation and even causing failure; the other is a box with louvered ventilation openings, which solves the heat dissipation problem, but in the rainy season or in high humidity environment, external moisture can easily enter the box through the ventilation openings, causing internal condensation, short circuits or corrosion of metal parts, posing serious safety hazards.

[0004] In addition, although some electromechanical boxes contain desiccant packets for dehumidification, the desiccant becomes ineffective once it is saturated with water. It requires regular manual inspection and replacement, which is costly and can easily lead to the loss of dehumidification function due to forgetting to do so. This makes it difficult to meet the protection requirements for the long-term stable operation of building electromechanical equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a protective device for building equipment boxes to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a protective device for building electromechanical boxes, comprising a box body, a box door, a ventilation structure, and a dehumidification and moisture-proof structure. The box body is hinged to the front side of the box body, a ventilation structure is embedded in the upper part of one side of the box body, and a dehumidification and moisture-proof structure is provided below that side. The dehumidification and moisture-proof structure includes a moisture-absorbing component disposed in the lower part of the box body. A cover is fixed to the top side of the moisture-absorbing component. The bottom side of the cover is hollow, and an opening is provided on one side of the side wall of the box body. The moisture-absorbing component is connected to the inside of the cover. A fan is locked and fixed in the middle of the inside of the cover. The air outlet of the fan corresponds to the opening of the cover. A shielding component is locked and fixed to the top of the cover for opening or closing the opening of the cover.

[0007] Preferably, the ventilation structure includes a rectangular frame embedded and fixed to the side of the box body. The rectangular frame has an integrally formed groove on one side of the box body. The side of the groove near the rectangular frame is hollow, and the other five sides are embedded and fixed with mesh. An opening and closing component is provided through the rectangular frame to open or close the interior of the rectangular frame.

[0008] Preferably, the opening and closing assembly includes a support frame locked and fixed to the inner side of a rectangular frame. A pad is locked and fixed to the lower left side of the support frame. An electric push rod is rotatably connected to the side of the pad away from the support frame. The top output end of the electric push rod is slidably connected to the middle of a Z-shaped slider. A first push rod and a second push rod are slidably connected to the left and right sides of the Z-shaped slider, respectively. A first remote rod is rotatably connected to the upper, middle, and lower three points of the first push rod. An upper closing piece is connected to the other end of each of the three first remote rods. The three upper closing pieces are rotatably disposed at the upper, middle, and lower three points of the support frame. A second remote rod is rotatably connected to the upper, middle, and lower three points of the second push rod. A lower closing piece is connected to the other end of each of the three second remote rods. The three lower closing pieces are rotatably disposed at the upper, middle, and lower three points of the support frame. Both the upper and lower closing pieces are disposed through the inner side of the support frame.

[0009] Preferably, a rectangular groove is longitudinally formed in the middle of the Z-shaped slider, and through grooves are formed at both ends of the Z-shaped slider. The top output end of the electric push rod is inserted and slids inside the rectangular groove, and the first push rod and the second push rod are respectively inserted and slid inside the two through grooves through a protrusion.

[0010] Preferably, the three upper connecting pieces and the three lower connecting pieces are arranged in an alternating pattern to form three sets of switch door groups for contact closure. When the upper connecting pieces and the lower connecting pieces in the three sets come into contact, they form a triangular shape and are parallel when they separate to their furthest point.

[0011] Preferably, the first push rod and the second push rod are of the same length and are arranged in parallel.

[0012] Preferably, the moisture-absorbing component includes a compartment seat embedded and fixed inside the bottom side of the box. An electric heating plate is provided at the bottom of the inner side of the compartment seat. A material tray is slidably arranged in the middle of the inner side of the compartment seat. The material tray is located above the electric heating plate and is filled with fine-pore silicone. A handle is locked and fixed to the upper right side of the material tray. Breathable meshes are provided on the left, front, rear and bottom sides of the material tray. A shaft is rotatably driven through the upper middle side of the compartment seat. An arc-shaped pressure plate is rotatably connected to the bottom side of the shaft, and the bottom end of the arc-shaped pressure plate is rotatably connected to the support frame. A partition mesh is embedded and fixed to the bottom side of the support frame. When the support frame is at its bottommost position, it is inserted into the material tray. A push block is provided at the part of the shaft located on the outside of the compartment seat.

[0013] Preferably, there are three arc-shaped pressure plates, and the three arc-shaped pressure plates are equidistantly distributed above the support frame.

[0014] Preferably, the shielding assembly includes a carrier embedded and fixed inside the housing, a slot frame fixedly connected to the rear side of the carrier, a servo motor locked and fixed to the upper front part of the slot frame, a push rod connected to the rear output end of the servo motor, a fastener rotatably connected to the side of the push rod away from the servo motor, a baffle fixedly locked and fixed to the lower side of the fastener, and a support rod rotatably connected to the middle left side of the fastener, with the side of the support rod away from the baffle rotatably connected to the slot frame.

[0015] Preferably, the connection points between the push rod and the support rod and the fastener are all provided with U-shaped grooves, and when the baffle is in a vertical state and in contact with the box body, the fastener is located inside the groove frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention achieves controllable temperature regulation inside the enclosure through a ventilation structure located on the upper side of the enclosure. This ventilation structure employs a linkage transmission method where an electric push rod, in conjunction with a Z-shaped slider, drives the first and second push rods to move in opposite directions, thereby opening and closing the upper and lower locking plates. This transmission structure is compact and occupies little space, making it particularly suitable for building electromechanical boxes with limited internal space. When the upper and lower locking plates are closed, they contact each other to form a triangular sealing structure, effectively preventing external dust, rainwater, and insects from entering the enclosure. When they are open to a parallel state, the ventilation opening area is maximized, airflow resistance is low, and heat dissipation efficiency is high, thus achieving excellent ventilation and heat dissipation performance while ensuring the required protection level.

[0018] This invention utilizes a dehumidification and moisture-proof structure located on the lower side of the enclosure to actively adsorb and expel moisture from inside the enclosure. This structure employs a drawer filled with fine-pore silica gel as the moisture-absorbing unit. Moist air enters the silica gel layer through a breathable mesh and is adsorbed and dried. When the silica gel becomes saturated, the control system activates a heating plate to regenerate the silica gel. The desorbed water vapor is then forced out of the enclosure through the vent under the action of a fan, achieving in-situ regeneration of the moisture-absorbing material. This eliminates the need for frequent manual replacement of the desiccant, significantly reducing maintenance costs and workload. Simultaneously, the shielding component ensures that the vent remains closed during non-dehumidification operations, effectively preventing backflow of external moisture and significantly improving the reliability of the dehumidification system.

[0019] This invention integrates the ventilation and dehumidification structures on the same side of the enclosure, forming a protective system that conforms to the principle of air convection. Hot air rises and is naturally exhausted through the upper ventilation structure, while cold air is replenished from below, achieving efficient natural convection heat dissipation. The lower dehumidification structure handles the settled humid and cold air, with clear functional zoning to avoid airflow short-circuiting. At the same time, the support frame and the arc-shaped pressing plate above the material tray can compress the silicone particles during transportation or vibration, ensuring their stability and maintaining an appropriate heat transfer gap with the heating plate. This ensures heating and regeneration efficiency while preventing overheating and damage to the silicone. The overall structural layout is reasonable and meets the comprehensive protection requirements of building equipment boxes for temperature and humidity environments. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the ventilation structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A schematic diagram of the left-side structure of the central opening and closing component;

[0023] Figure 4 This is a schematic diagram of the dehumidification and moisture-proof structure of the present invention;

[0024] Figure 5 This is a schematic diagram showing the installation positions of the enclosure and the fan in this invention;

[0025] Figure 6 This is a front view of the moisture-absorbing component of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure between the material tray and the support frame of the present invention;

[0027] Figure 8 This is a schematic diagram of the shielding component of the present invention;

[0028] Figure 9 For the present invention Figure 8 A schematic diagram of the left-side structure.

[0029] In the diagram: Box body-1, Box door-2, Ventilation structure-3, Dehumidification and moisture-proof structure-4, Rectangular frame-31, Slot frame-32, Mesh panel-33, Opening and closing assembly-34, Support frame-341, Pad frame-342, Electric push rod-343, Z-shaped slider-344, First push rod-345, Second push rod-346, First remote lever-347, Upper closing plate-348, Second remote lever-349, Lower closing plate-3410, Moisture absorption assembly-41 42. Cover bin - 43. Fan - 44. Shielding assembly - 411. Bin seat - 412. Heating plate - 413. Material drawer - 414. Handle - 415. Ventilation mesh - 416. Shaft - 417. Arc-shaped pressure plate - 418. Bearing frame - 419. Partition mesh - 4161. Push block - 441. Carrier seat - 441. Slot frame - 442. Servo motor - 443. Push rod - 444. Fastener - 445. Baffle - 446. Support rod - 447. Detailed Implementation

[0030] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0031] Please see Figures 1 to 9 The present invention provides a protective device for building equipment boxes, including a box body 1, a box door 2, a ventilation structure 3 and a dehumidification and moisture-proof structure 4. The box body 1 is hinged to the front side of the box door 2, and the box door 2 can be equipped with an observation window and a door lock to facilitate observation of the internal status and to lock it securely. The box body 1 is made of cold-rolled steel plate, and the inner and outer surfaces are sprayed with anti-corrosion coating to extend its service life.

[0032] Functional partitioning is designed on the upper side of the enclosure 1. A ventilation structure 3 is embedded in the upper area of ​​this side to achieve controllable heat dissipation and ventilation. A dehumidification and moisture-proof structure 4 is set in the lower area of ​​this side to actively absorb and expel moisture inside the enclosure 1.

[0033] Please see Figures 1 to 3 This invention provides a protective device for building electromechanical boxes. The ventilation structure 3 includes a rectangular frame 31 embedded and fixed to the side of the box body 1. The rectangular frame 31 constitutes the main skeleton of the ventilation opening. A slot frame 32 is integrally formed on one side of the rectangular frame 31 inside the box body 1. The slot frame 32 is box-shaped, with the side near the rectangular frame 31 being hollow. The other five sides are embedded and fixed with mesh 33 to prevent insects or large foreign objects from entering the box body 1, thus playing a protective role. An opening and closing component 34 is provided through the rectangular frame 31 to open or close the interior of the rectangular frame 31.

[0034] The opening and closing assembly 34 includes a support frame 341 locked and fixed inside the rectangular frame 31. A pad 342 is locked and fixed on the lower left side of the support frame 341. An electric push rod 343 is rotatably connected to the side of the pad 342 away from the support frame 341. The top output end of the electric push rod 343 is slidably connected to the middle of the Z-shaped slider 344. Specifically, a rectangular groove is longitudinally opened in the middle of the Z-shaped slider 344. The top output end of the electric push rod 343 is inserted and slids inside the rectangular groove and can slide slightly along the rectangular groove to compensate for trajectory deviation during the movement. Both ends of the Z-shaped slider 344 are transversely opened with through slots. The first push rod 345 and the second push rod 346 are respectively inserted and slid into the two through slots through a protrusion. When the electric push rod 343 extends or retracts, it pushes the Z-shaped slider 344 to move. The Z-shaped slider 344 then drives the first push rod 345 and the second push rod 346 to move in opposite directions through the through slots at both ends.

[0035] The first push rod 345 is rotatably connected to a first remote rod 347 at its upper, middle, and lower positions. The other end of each of the three first remote rods 347 is connected to an upper fitting piece 348. The three upper fitting pieces 348 are rotatably positioned at the upper, middle, and lower positions of the support frame 341. Similarly, the second push rod 346 is rotatably connected to a second remote rod 349 at its upper, middle, and lower positions. The other end of each of the three second remote rods 349 is connected to a lower fitting piece 3410. The three lower fitting pieces 3410 are rotatably positioned at the upper, middle, and lower positions of the support frame 341. Both the upper fitting pieces 348 and the lower fitting pieces 3410 are inserted through the inner side of the support frame 341.

[0036] To ensure smooth movement, the first push rod 345 and the second push rod 346 are of the same length and are arranged in parallel. The three upper closing plates 348 and the three lower closing plates 3410 are staggered, with one upper closing plate 348 corresponding to one lower closing plate 3410, forming three sets of opening and closing door groups for contact closure. When the electric push rod 343 extends, it drives the Z-shaped slider 344 to move, thereby causing the first push rod 345 and the second push rod 346 to move closer or further apart, driving the first remote lever 347 and the second remote lever 349 to swing, ultimately causing the upper closing plates 348 and the lower closing plates 3410 to open and close. After the upper closing plates 348 and the lower closing plates 3410 in the three sets come into contact, they form a triangular shape. This structure has good mechanical stability and tight closure. When they are separated to the farthest point, the upper closing plates 348 and the lower closing plates 3410 are parallel, at which point the ventilation opening area is the largest and the airflow resistance is the smallest.

[0037] Please see Figure 1 , Figures 4 to 9This invention provides a protective device for building equipment boxes. The dehumidification and moisture-proof structure 4 includes a moisture-absorbing component 41 disposed on the lower side of the box body 1. A cover 42 is fixed on the top side of the moisture-absorbing component 41. The bottom side of the cover 42 is hollow, and an opening is provided on one side of the side wall of the box body 1. The moisture-absorbing component 41 is connected to the inside of the cover 42. A fan 43 is locked and fixed in the middle of the inside of the cover 42. The air outlet of the fan 43 corresponds to the opening of the cover 42. A shielding component 44 is locked and fixed on the top of the cover 42 for opening or closing the opening of the cover 42.

[0038] The moisture-absorbing component 41 includes a compartment 411 embedded and fixed inside the bottom side of the housing 1. An electric heating plate 412 is provided on the bottom inner side of the compartment 411 to provide heat. A material tray 413 is slidably arranged in the middle inner side of the compartment 411. The material tray 413 is positioned above the electric heating plate 412, with a gap between them to avoid direct contact that could cause overheating. The material tray 413 is filled with moisture-absorbing material, preferably fine-porous silica gel, because it is chemically stable, renewable, and has a moderate cost. A handle 414 is locked and fixed on the upper right side of the material tray 413 to facilitate the operator to pull it out for maintenance or initial filling. Breathable meshes 415 are provided on the left, front, rear, and bottom sides of the material tray 413 to ensure that air can circulate through the fine-porous silica gel layer.

[0039] To prevent the material tray 413 from shaking during transportation or vibration, and to ensure a stable heat conduction distance between the fine-pore silicone and the heating plate 412, a clamping mechanism is used for clamping and positioning. Specifically, a shaft 416 is rotatably inserted through the upper part of the inner side of the storage base 411. A push block 4161 is provided on the outer part of the shaft 416, and the operator can rotate the shaft 416 by moving the push block 4161. Three arc-shaped pressure plates 417 are rotatably connected to the bottom side of the shaft 416. The three arc-shaped pressure plates 417 are equidistantly distributed and rotatably connected to the bottom end of the support frame 418. A mesh 419 is embedded and fixed on the bottom side of the support frame 418. In the initial state, the support frame 418 is located above the material tray 413. When it is necessary to press, the shaft 416 is rotated, and the shaft 416 drives the arc-shaped pressure plates 417 to swing downward. The arc-shaped pressure plates 417 push the support frame 418 down until the mesh 419 at the bottom of the support frame 418 is inserted into the material tray 413 and presses down the fine-pore silicone particles. At this time, the arc-shaped pressure plates 417 are in a tensioned state, providing continuous pressing force.

[0040] The shielding component 44 includes a carrier 441 embedded and fixed inside the housing 1. A slot frame 442 is fixedly connected to the rear side of the carrier 441. A servo motor 443 is locked and fixed to the upper front part of the slot frame 442. A push rod 444 is connected to the rear output end of the servo motor 443. A fastener 445 is rotatably connected to the side of the push rod 444 away from the servo motor 443. A baffle 446 is locked and fixed to the lower middle part of the fastener 445. A support rod 447 is rotatably connected to the middle left side of the fastener 445. The side of the support rod 447 away from the baffle 446 is rotatably connected to the slot frame 442. U-shaped grooves are provided at the connection points of the push rod 444 and the support rod 447 with the fastener 445 to achieve a hinged connection.

[0041] When the servo motor 443 is working, it drives the push rod 444 to swing. The push rod 444 pushes the fastener 445. Under the constraint of the support rod 447, the fastener 445 drives the baffle 446 to move in an arc, thereby realizing the opening or closing of the baffle 446 to the passage. When the baffle 446 is in a vertical state and contacts the side wall of the housing 1, it just closes the passage. At this time, the fastener 445 is completely stored inside the slot frame 442, and the structure is compact.

[0042] The working principle of the protective device for building equipment boxes of the present invention is as follows:

[0043] First, when the internal temperature of the housing 1 rises but the humidity remains within the normal range, the device enters the heat dissipation and ventilation mode. The control system sends a start command to the electric push rod 343 in the ventilation structure 3. The output end of the electric push rod 343 extends, driving the Z-shaped slider 344, which is slidably connected to it, to move upward. When the Z-shaped slider 344 moves upward, the transverse slots at both ends of it simultaneously drive the first push rod 345 and the second push rod 346, causing them to slide in opposite directions. The movement of the first push rod 345 drives the upper closing plate 348 to rotate around the support via the first remote rod 347, which is rotatably connected to it. The hinge point on frame 341 flips upward; at the same time, the movement of the second push rod 346 drives the lower hinge 3410 to flip downward through the second remote rod 349, so that the upper hinge 348, which was originally closed and triangular, gradually separates from the lower hinge 3410 until it unfolds into a parallel state; at this time, the ventilation channel inside the rectangular frame 31 is fully opened, and the hot air inside the box 1 is discharged outside the box through the hollow surface of the slot frame 32 and through the opened hinge group under the action of thermal pressure. At the same time, the cooler air outside is replenished into the box 1 from below, forming natural convection and achieving efficient heat dissipation.

[0044] Second, when the humidity inside the housing 1 rises but the temperature remains normal, the device enters the dehumidification preparation mode. The control system first starts the servo motor 443 in the shielding component 44. The servo motor 443 drives the push rod 444 to swing, and the push rod 444 pushes the fastener 445 to move. Under the constraint of the support rod 447, the fastener 445 drives the baffle 446 to flip outward from the inside of the slot frame 442 along an arc trajectory, so that the originally closed opening of the hood 42 gradually opens. When the baffle 446 flips to form a certain angle with the side wall of the housing 1, the opening is fully exposed. At this time, the outlet of the fan 43 forms a connecting channel with the outside of the housing 1, preparing for subsequent dehumidification. Throughout the dehumidification process, the baffle 446 of the shielding component 44 remains open to ensure that the dehumidification channel is unobstructed.

[0045] Third, when the humidity inside the chamber 1 is too high and active dehumidification is required, the device enters the adsorption and regeneration cycle mode. The material tray 413 in the moisture absorption component 41 at the bottom of the chamber 1 is filled with fine-pore silica gel. The humid air inside the chamber 1 enters the silica gel layer through the breathable mesh 415 around and at the bottom of the material tray 413. Water molecules are adsorbed by the silica gel, and the dried air returns to the inside of the chamber 1, realizing cyclic dehumidification. As the adsorption time increases, the silica gel gradually becomes saturated. At this time, the control system starts the heating plate 412 to heat the silica gel. The heat generated by the heating plate 412 is transferred upward to the material tray 413. The silica gel layer inside raises the silica gel temperature to the regeneration temperature. Under heating, the moisture adsorbed by the silica gel desorbs to form high-temperature water vapor, which accumulates inside the hood 42. Subsequently, the control system starts the fan 43, which rotates at high speed to generate negative pressure, forcibly drawing in the high-temperature water vapor inside the hood 42 and discharging it to the outside of the box 1 through the open hood 42 opening. During the dehumidification process, the silica gel particles remain stable due to the pressing mechanism consisting of the support frame 418 and the arc-shaped pressing plate 417 above the silica gel, preventing them from scattering due to airflow impact and ensuring the smooth progress of the regeneration process.

[0046] Fourth, when the dehumidification operation is completed or the temperature and humidity are within the normal range, the device enters the standby and recovery mode. The control system first shuts down the electric heating plate 412 to stop heating. The fan 43 continues to run for a period of time to remove residual moisture before shutting down. Subsequently, the servo motor 443 reverses its action, driving the push rod 444 to rotate the fastener 445 and the baffle 446 in the opposite direction, so that the baffle 446 closes the opening of the hood 42 again, forming a sealed state to prevent external moisture from flowing back in. At the same time, if the ventilation structure 3 was previously open and the temperature has returned to normal, the electric push rod 343 retracts in the opposite direction, driving the Z-shaped slider 344 to move downward, so that the first push rod 345 and the second push rod 346 drive the upper closing plate 348 and the lower closing plate 3410 to rotate in the opposite direction and reset until the two come into contact with each other and close to form a triangular sealing structure, blocking the airflow inside and outside the box 1, so that the box 1 returns to a sealed state, completing a complete working cycle, and waiting for the next temperature and humidity change to trigger the corresponding action.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective device for a building equipment box, comprising a box body (1), wherein a door (2) is hinged to the front side of the box body (1), characterized in that, A ventilation structure (3) is embedded above one side of the box (1), and a dehumidification and moisture-proof structure (4) is provided below this side. The dehumidification and moisture-proof structure (4) includes a moisture-absorbing component (41) located at the lower side of the box (1). A cover (42) is fixed on the top side of the moisture-absorbing component (41). The bottom side of the cover (42) is hollow, and an opening is provided on one side of the side wall of the box (1). The moisture-absorbing component (41) is connected to the inside of the cover (42). A fan (43) is locked and fixed in the middle of the inside of the cover (42). The air outlet of the fan (43) corresponds to the opening of the cover (42). A shielding component (44) is locked and fixed on the top of the cover (42) for opening or closing the opening of the cover (42).

2. The protective device for building equipment boxes according to claim 1, characterized in that: The ventilation structure (3) includes a rectangular frame (31) embedded and fixed to the side of the box (1). The rectangular frame (31) has a slotted frame (32) integrally formed on one side inside the box (1). The side of the slotted frame (32) near the rectangular frame (31) is hollow, and the other five sides are embedded and fixed with mesh (33). An opening and closing component (34) is provided through the inside of the rectangular frame (31) for opening or closing the inside of the rectangular frame (31).

3. The protective device for building equipment boxes according to claim 2, characterized in that: The opening and closing assembly (34) includes a support frame (341) locked and fixed to the inner side of a rectangular frame (31). A pad (342) is locked and fixed to the lower left side of the support frame (341). An electric push rod (343) is rotatably connected to the side of the pad (342) away from the support frame (341). The top output end of the electric push rod (343) is slidably connected to the middle of the Z-shaped slider (344). A first push rod (345) and a second push rod (346) are slidably connected to the left and right sides of the Z-shaped slider (344), respectively. A first remote rod (1) is rotatably connected to the upper, middle and lower parts of the first push rod (345). 347), the other end of the three first remote rods (347) is connected to an upper connecting piece (348), the three upper connecting pieces (348) are respectively rotatably set at the upper, middle and lower positions of the support frame (341), the second push rod (346) is respectively rotatably connected to a second remote rod (349) at the upper, middle and lower positions, the other end of the three second remote rods (349) is respectively connected to a lower connecting piece (3410), the three lower connecting pieces (3410) are respectively rotatably set at the upper, middle and lower positions of the support frame (341), the upper connecting pieces (348) and the lower connecting pieces (3410) are both through the inner side of the support frame (341).

4. The protective device for building equipment boxes according to claim 3, characterized in that: The Z-shaped slider (344) has a rectangular groove in the middle longitudinally, and both ends of the Z-shaped slider (344) have through grooves in the horizontal direction. The top output end of the electric push rod (343) is inserted and slides inside the rectangular groove. The first push rod (345) and the second push rod (346) are respectively inserted and slide inside the two through grooves through a protrusion.

5. The protective device for building equipment boxes according to claim 3, characterized in that: The three upper connecting pieces (348) and the three lower connecting pieces (3410) are arranged in an alternating manner to form three sets of switch door groups for contact closure. When the upper connecting pieces (348) and the lower connecting pieces (3410) in the three sets come into contact, they form a triangular shape and are parallel when they separate to the farthest point.

6. The protective device for building equipment boxes according to claim 3, characterized in that: The first push rod (345) and the second push rod (346) are of the same length and are arranged in parallel.

7. The protective device for building equipment boxes according to claim 1, characterized in that: The moisture-absorbing component (41) includes a compartment (411) embedded and fixed inside the bottom side of the housing (1). A heating plate (412) is provided on the bottom inner side of the compartment (411). A material tray (413) is slidably provided in the middle inner side of the compartment (411). The material tray (413) is located above the heating plate (412), and the inside of the material tray (413) is filled with fine-pore silicone. A handle (414) is locked and fixed on the upper right side of the material tray (413). The left, front, rear and bottom sides of the material tray (413) are all provided with There is a breathable mesh (415). A shaft (416) is rotatably inserted through the upper side of the inner part of the bin (411). An arc-shaped pressure plate (417) is rotatably connected to the bottom side of the shaft (416). The bottom end of the arc-shaped pressure plate (417) is rotatably connected to the support frame (418). A partition mesh (419) is embedded and fixed to the bottom side of the support frame (418). When the support frame (418) is at the bottom, it is inserted into the material tray (413). A push block (4161) is provided at the part of the shaft (416) located on the outside of the bin (411).

8. The protective device for building equipment boxes according to claim 7, characterized in that: Three arc-shaped pressure plates (417) are provided, and the three arc-shaped pressure plates (417) are equidistantly distributed above the support frame (418).

9. The protective device for building equipment boxes according to claim 1, characterized in that: The shielding assembly (44) includes a carrier (441) embedded and fixed inside the housing (1). A slot frame (442) is fixedly connected to the rear side of the carrier (441). A servo motor (443) is locked and fixed to the upper front part of the slot frame (442). A push rod (444) is connected to the rear output end of the servo motor (443). A fastener (445) is rotatably connected to the side of the push rod (444) away from the servo motor (443). A baffle (446) is locked and fixed to the lower middle side of the fastener (445). A support rod (447) is rotatably connected to the middle left side of the fastener (445). The side of the support rod (447) away from the baffle (446) is rotatably connected to the slot frame (442).

10. A protective device for a building equipment box according to claim 9, characterized in that: The push rod (444) and support rod (447) are both provided with U-shaped grooves at the connection points with the fastener (445). When the baffle (446) is in a vertical state and contacts the box (1), the fastener (445) is located inside the groove frame (442).

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