A self-warning switch cabinet of dehumidification and drainage type

Abstract

The application provides a dehumidification drainage type self-warning switch cabinet applied to the field of switch cabinets, in an initial state, a moisture absorbing part successfully absorbs moisture by virtue of the part exposed outside a water collecting tank, then a gas bag expands by utilizing the temperature inside the switch cabinet body, and then moves upward by utilizing the increase of buoyancy to separate from the inside of the water collecting tank, so that the change of water absorbing height is realized, the moisture absorbing degree of the moisture absorbing part inside the switch cabinet body is maximized, after saturation, the gas bag is lowered to the inside of the water collecting tank under the cooperation of gravity and water cooling, and when passing the inner side of two groups of movable flaps, water in the elastic moisture absorbing sleeve is successfully squeezed out, then the water is discharged from the inside of the switch cabinet body through a liquid discharge pipe, and a humidity warning signal in the switch cabinet body is sent to the outside through the bending degree of the water flow pressure bending arc-shaped elastic sheet, and the arc-shaped elastic sheet can be reset to block the inside of the liquid discharge pipe after water discharge, so that external water vapor is prevented from entering the switch cabinet body.

Description

Technical Field

[0001] This application relates to the field of switchgear, and in particular to a dehumidification and diversion type self-early warning switchgear. Background Technology

[0002] Switchgear refers to a complete set of power distribution equipment assembled according to a certain scheme of primary and secondary equipment. It is mainly used to control and protect lines and equipment. According to the incoming and outgoing line voltage level, it is divided into high-voltage switchgear and low-voltage switchgear. The internal structure is mainly divided into busbar room, circuit breaker room, secondary control room and feeder room. A large number of electronic circuits are centrally arranged inside. Therefore, during the use of switchgear, attention should be paid to timely heat dissipation and dehumidification to ensure the normal operation of the electronic components inside the switchgear.

[0003] Existing switch cabinets typically use moisture-absorbing panels or dehumidifying fans to dehumidify the interior of the cabinet. However, since these panels and fans are fixed installations, the dehumidification area inside the cabinet is limited, which is not conducive to dehumidification. Furthermore, once the moisture-absorbing panel is saturated, the water inside is difficult to drain on its own and will evaporate back into the cabinet, thus compromising the effectiveness of the dehumidification process.

[0004] To address this, we propose a dehumidification and drainage type self-early warning switchgear. By utilizing the heat inside the switchgear, the height of the moisture-absorbing component inside the switchgear can be flexibly adjusted, maximizing the effective moisture absorption area of ​​the moisture-absorbing component inside the switchgear. At the same time, when the moisture-absorbing component resets, the accumulated water inside the moisture-absorbing component can be squeezed and collected, and discharged into the switchgear through the drainage pipe, thus avoiding secondary moisture absorption. Summary of the Invention

[0005] The purpose of this application is to improve existing switchgear with internal dehumidification function. Compared with the prior art, it provides a dehumidification and drainage type self-early warning switchgear. In the initial state, the moisture-absorbing component absorbs moisture smoothly by the part exposed outside the water collection tank. Then, the airbag expands due to the internal temperature of the switchgear cabinet, and then moves upward and detaches from the inside of the water collection tank by the increase of buoyancy, realizing the change of water absorption height. After the absorption is saturated, the airbag descends into the inside of the water collection tank under the combined action of gravity and water cooling. When passing the inside of the two sets of movable flaps, the water inside the elastic moisture-absorbing sleeve is successfully squeezed out. Then, it is discharged into the inside of the switchgear cabinet through the drain pipe. The downward bending of the arc-shaped elastic sheet by the water flow sends a moisture warning signal to the outside of the switchgear cabinet.

[0006] Furthermore, the bottom end of the arc-shaped elastic sheet is equidistantly arranged with warning rings that radiate outward from the center, and the color of the warning rings gradually deepens from the center outward. When the arc-shaped elastic sheet bends downward, the different colors of the warning rings exposed at the end of the drain pipe in the bent state can be observed to obtain warning signals of different levels of moisture content inside the switch cabinet.

[0007] Furthermore, the outer side of the elastic moisture-absorbing sleeve is covered with an insulating elastic film, and the surface of the insulating elastic film has holes. The surface of the insulating elastic film is coated with a water-proof coating, which can ensure that there is no moisture residue on the surface of the moisture-absorbing component during operation, avoid short circuit accidents caused by contact between the moisture-absorbing component and electronic components, and ensure that the dehumidification work is normal and safe.

[0008] Furthermore, a reset magnetic strip plate is installed on the bottom wall of the water collection tank, located on one side of the drain pipe. A magnetic ring that attracts the reset magnetic strip plate is sleeved on the surface of the pull cable. The attraction between the reset magnetic strip plate and the magnetic ring is less than 1N. The tail end of the pull cable is fixed to one end of the top surface of the reset magnetic strip plate. The pull cable plays a limiting role during the rising of the moisture-absorbing component. During the falling of the moisture-absorbing component, the adsorption between the magnetic ring and the reset magnetic strip plate ensures the stable falling of the moisture-absorbing component, thereby realizing the squeezing drainage operation.

[0009] Furthermore, the inner top wall of the water collection tank is symmetrically equipped with L-shaped limiting baffles, which are located on both sides of the movable blade. The top of the limiting baffle is equipped with a spring that connects the top end to the bottom end of the movable blade, and the initial elastic force of the spring is not less than the weight of the movable blade. The cooperation between the limiting baffle and the spring allows the moisture-absorbing component to control the downward angle of the movable blade when it descends to squeeze the water inside the elastic moisture-absorbing sleeve, thereby ensuring the stable operation of the squeezing process.

[0010] Furthermore, the sum of the widths of the two sets of movable flaps is less than the through slot. The moisture-absorbing component is clamped and placed in the gap between the two sets of movable flaps in the initial state, and the volume of the moisture-absorbing component exposed outside the water collection tank in the initial state is not less than half of the volume of the airbag itself. This allows the moisture-absorbing component to still be exposed inside the switch cabinet to perform moisture absorption when the internal temperature of the switch cabinet is normal and the moisture-absorbing component does not rise to absorb moisture.

[0011] Optionally, the airbag is filled with a mixed powder, which is a mixture of pigment powder and magnetic powder, and the mixing ratio of pigment powder to magnetic powder is 1:1-3:2. The initial buoyancy of the airbag is greater than the weight of the mixed powder. After the airbag is destroyed, the mixed powder inside mixes with the water inside the elastic moisture-absorbing sleeve. The color of the liquid discharged from the drain pipe can be used to determine whether the airbag has been damaged.

[0012] Optionally, the inner wall of the drain pipe is provided with a magnetic groove located below the reset spring. The inner wall of the drain pipe is symmetrically equipped with upwardly inclined arc-shaped rubber sheets, and the inclination angle of the arc-shaped rubber sheets is no more than 45 degrees. The arc-shaped rubber sheets are located below the magnetic groove. The surface of the arc-shaped rubber sheets away from the inner wall of the drain pipe is coated with a magnetic coating that attracts the magnetic groove. The magnetic coating and the magnetic powder repel each other. When the magnetic powder mixed in the water flows through the arc-shaped rubber sheets, it will generate a corresponding repulsive effect, thereby pushing the arc-shaped rubber sheets to flip up and be attracted into the magnetic groove. This solves the problem of not being able to see the abnormal color of the liquid inside the drain pipe during unattended operation.

[0013] Furthermore, the width of the arc-shaped rubber sheet is smaller than that of the arc-shaped elastic sheet, and the initial state of the arc-shaped rubber sheet is isolated from the magnetic groove, so that when the arc-shaped elastic sheet bends down to drain the liquid, it can block the downward flow of water and ensure normal drainage.

[0014] Furthermore, the surface of the magnetic coating is coated with warning color blocks at equal intervals, and the magnetic attraction between the magnetic groove and the magnetic coating is greater than the elastic inertia of the arc-shaped rubber sheet itself. The warning color blocks help to see the color of the arc-shaped rubber sheet, thereby judging the damage of the airbag. The difference in magnetic attraction can help the arc-shaped rubber sheet and the magnetic groove to be stably adsorbed, and can be manually peeled off with the help of external force to restore the monitoring state of the cavity.

[0015] Compared to existing technologies, the advantages of this application are:

[0016] (1) In the initial state, the moisture-absorbing component absorbs moisture smoothly by the part exposed outside the water collection tank. Then, the airbag expands by the temperature inside the switch cabinet and moves upward to get away from the inside of the water collection tank by the increase of buoyancy, thus realizing the change of water absorption height. After the adsorption is saturated, the airbag descends into the inside of the water collection tank under the action of gravity and water cooling. When passing the inside of the two sets of movable blades, the water inside the elastic moisture-absorbing sleeve is squeezed out smoothly. Then, it is discharged into the inside of the switch cabinet through the drain pipe. The water flow bends the arc-shaped elastic sheet to send a warning signal of moisture inside the switch cabinet to the outside.

[0017] (2) When the arc-shaped elastic sheet bends downward, the different colors of the warning rings exposed at the end of the drain pipe can be used to obtain warning signals of different levels of moisture content inside the switch cabinet.

[0018] (3) The insulating elastic film with a waterproof coating can ensure that there is no moisture residue on the surface of the moisture-absorbing component during operation, avoid short circuit accidents caused by contact between the moisture-absorbing component and electronic components, and ensure that the dehumidification work is carried out normally and safely.

[0019] (4) The pull cable plays a limiting role during the rising process of the moisture-absorbing part. During the falling process of the moisture-absorbing part, the magnetic ring and the reset magnetic strip plate are used to ensure the stable falling of the moisture-absorbing part, thereby realizing the squeezing and drainage operation.

[0020] (5) The combination of the limiting baffle and the spring component allows the moisture-absorbing component to control the downward angle of the movable blade when it descends to squeeze the water inside the elastic moisture-absorbing sleeve, thereby ensuring the stable operation of the squeezing process.

[0021] (6) After the airbag is destroyed, the mixed powder inside mixes with the water inside the elastic moisture-absorbing sleeve. The color of the liquid discharged from the drain pipe can be used to determine whether the airbag has been damaged.

[0022] (7) When the magnetic powder mixed in the water flows through the arc-shaped rubber sheet, it will generate a corresponding repulsive effect, thereby pushing the arc-shaped rubber sheet to flip up and be attracted into the magnetic groove, thus solving the problem of not being able to see the abnormal color of the liquid inside the drain pipe during unattended periods. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the working status of this application;

[0024] Figure 2 This is a schematic diagram of the overall appearance of this application;

[0025] Figure 3 This is a schematic diagram of the interior of the switch cabinet in this application;

[0026] Figure 4 This is a schematic diagram showing the arrangement of the moisture-absorbing component and the water collection tank in the initial state of this application;

[0027] Figure 5 This is a schematic diagram of the interior of the water collection tank in this application;

[0028] Figure 6 This is a cross-sectional view of the moisture-absorbing component of this application;

[0029] Figure 7 This is a schematic diagram of the interior of the drain pipe tail end in this application;

[0030] Figure 8 This is a schematic diagram of the internal drainage state at the tail end of the drain pipe in this application;

[0031] Figure 9 This is a schematic diagram of the bottom end of the arc-shaped elastic sheet in this application;

[0032] Figure 10 This is a schematic diagram showing the drainage state of the drain pipe end when the airbag is damaged, as per this application.

[0033] Explanation of the labels in the diagram:

[0034] 1. Switch cabinet body; 2. Water collection tank; 21. Moisture-absorbing flap; 22. Drain hole; 23. Limiting baffle; 3. Moisture-absorbing component; 31. Elastic moisture-absorbing sleeve; 32. Airbag; 33. Insulating elastic film; 34. Mixed powder; 4. Reset magnetic strip plate; 41. Pull cable; 42. Magnetic ring; 5. Drain pipe; 51. One-way valve; 52. Arc-shaped elastic sheet; 53. Reset spring; 54. Arc-shaped rubber sheet; 55. Magnetic groove. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] Example 1:

[0037] This invention provides a dehumidification and drainage type self-early warning switch cabinet. Please refer to [link / reference]. Figure 1-4 and Figure 7-8 The system includes a switch cabinet 1, a water collection tank 2, a moisture-absorbing component 3, and a drain pipe 5. The water collection tank 2 is installed on the rear wall of the switch cabinet 1. The top of the water collection tank 2 is provided with a through groove. The inner walls on both sides of the through groove are connected to movable leaf plates 21 by hinges. The interior of the movable leaf plates 21 is provided with drainage holes 22. Moisture-absorbing components 3 are arranged on the inner sides of the two sets of movable leaf plates 21. The moisture-absorbing component 3 includes an air bag 32. The outer surface of the air bag 32 is covered with an elastic moisture-absorbing sleeve 31. The tail end of the air bag 32 is connected to a pull cable 41. The bottom of the water collection tank 2 is connected to a drain pipe 5 extending to the outside of the switch cabinet 1. The tail end of the drain pipe 5 is made of transparent material. The inner wall of the tail end of the drain pipe 5 is fixed with a one-way valve 51 arranged vertically and an arc-shaped elastic piece 52. The bottom end of the arc-shaped elastic piece 52 is connected to a return spring 53 whose tail end is connected to the inner wall of the drain pipe 5.

[0038] Specifically, when the moisture-absorbing component 3 performs moisture absorption inside the switch cabinet 1, it uses the elastic moisture-absorbing sleeve 31, which is semi-exposed in the initial state and made of water-absorbing material, to absorb the moisture inside the switch cabinet 1. Under the diffusion effect, the water gradually diffuses into the elastic moisture-absorbing sleeve 31 located inside the water collection tank 2. As the temperature inside the switch cabinet 1 rises, the air bag 32 gradually expands, thereby gradually increasing the buoyancy of the air bag 32, causing the moisture-absorbing component 3 to gradually rise. During the rising process of the moisture-absorbing component 3, the water inside the lower half of the elastic moisture-absorbing sleeve 31 is squeezed out by the movable blade 21 and flows and diffuses into the interior of the water collection tank 2.

[0039] During the process of the moisture-absorbing component 3 floating inside the switch cabinet 1, the elastic moisture-absorbing sleeve 31 will continuously absorb the water vapor inside the switch cabinet 1, thereby increasing the weight of the elastic moisture-absorbing sleeve 31. The cooling effect of the water will reduce the expansion effect of the air bag 32, causing the air bag 32 to gradually descend. When passing through the gap between the two sets of movable blades 21, the water inside the elastic moisture-absorbing sleeve 31, which is in a water-absorbing saturated state, is squeezed and compressed by the close proximity of the surfaces of the two sets of movable blades 21. This forces the solid inside the elastic moisture-absorbing sleeve 31 to be squeezed and flow and diffuse into the water collection tank 2, and then discharged out of the interior of the switch cabinet 1 in one direction through the drain pipe 5.

[0040] During the drainage process, the gravity of the internal water acts on the arc-shaped elastic sheet 52, causing the arc-shaped elastic sheet 52 to bend downwards and be discharged smoothly. When the arc-shaped elastic sheet 52 bends downwards, the warning color at the bottom of the arc-shaped elastic sheet 52 can help to provide a warning effect. After the drainage is completed, the return spring 53 is used to help the arc-shaped elastic sheet 52 to reset, which can block the drainage pipe 5 and prevent external moisture from entering the interior of the switch cabinet 1.

[0041] In summary, this device, through the cooperation of the moisture-absorbing component 3, the water collection tank 2, the pull cable 41, and the drain pipe 5, utilizes the heat inside the switch cabinet 1 to drive the moisture-absorbing component 3 to flexibly switch the moisture absorption height inside the cabinet. At the same time, during the height cycle switching, the water vapor saturated inside the moisture-absorbing component 3 is squeezed into the water collection tank 2 and discharged through the drain pipe 5. During the discharge process, the arc-shaped elastic sheet 52 bends downward and outward to issue a moisture warning message inside the switch cabinet 1.

[0042] Please see Figure 9 The bottom of the arc-shaped elastic sheet 52 is equidistantly arranged with warning rings that radiate outward from the center, and the color of the warning rings gradually deepens from the center outward.

[0043] Specifically, during drainage, the arc-shaped elastic sheet 52 bends downwards, and the warning ring at the bottom will project and overlap with the inner wall of the drainage pipe 5. The greater the impact of the water flow, the greater the downward bending of the arc-shaped elastic sheet 52, and thus more colors of the warning rings are exposed. Therefore, the moisture level inside the switch cabinet 1 can be reported and warned in a graded manner based on the color of the warning rings exposed by the downward bending of the arc-shaped elastic sheet 52.

[0044] Please see Figure 6 An insulating elastic film 33 is attached to the outer side of the elastic moisture-absorbing sleeve 31, and the surface of the insulating elastic film 33 has holes and a water-proof coating is applied to the surface of the insulating elastic film 33.

[0045] Specifically, during the moisture absorption process, the use of the insulating elastic film 33 can effectively prevent the wet elastic moisture-absorbing sleeve 31 from contacting the relevant electronic components inside the switch cabinet 1, thus avoiding short circuit accidents. At the same time, the use of the water-proof coating can prevent water from adhering to the surface of the insulating elastic film 33, ensuring the safety of electronic components. The openings on the surface of the insulating elastic film 33 allow water inside the elastic moisture-absorbing sleeve 31 to be smoothly discharged when the moisture-absorbing component 3 is squeezed.

[0046] Please see Figure 5 The bottom wall of the water collection tank 2 is equipped with a reset magnetic strip plate 4 located on one side of the drain pipe 5. The surface of the pull cable 41 is fitted with a magnetic ring 42 that attracts the reset magnetic strip plate 4. The attraction between the reset magnetic strip plate 4 and the magnetic ring 42 is less than 1N. The tail end of the pull cable 41 is fixed to one end of the top surface of the reset magnetic strip plate 4.

[0047] Specifically, the length of the magnetic ring 42 not arranged on the surface of the traction cable 41 is less than the depth of the water collection tank 2;

[0048] As the moisture-absorbing component 3 moves upward, the pull cable 41 gradually straightens, which limits the moisture-absorbing component 3. During the descent of the moisture-absorbing component 3, under the adsorption between the magnetic ring 42 and the reset magnetic strip plate 4, the originally taut pull cable 41 is bent and constrained on the surface of the reset magnetic strip plate 4, which can then gradually pull the moisture-absorbing component 3 down to the movable leaf plate 21 to accept the water squeezing and discharge operation. Afterwards, under the action of the heat inside the switch cabinet 1, the moisture-absorbing component 3 floats up again.

[0049] Because the magnetic attraction between the reset magnetic strip plate 4 and the magnetic ring 42 is weak, the resistance encountered by the moisture-absorbing component 3 during the upward process is insufficient to resist the upward buoyancy of the moisture-absorbing component 3, thus allowing the moisture-absorbing component 3 to rise smoothly.

[0050] Please see Figure 5 The inner top wall of the water collection tank 2 is symmetrically equipped with L-shaped limiting baffles 23, and the limiting baffles 23 are located on both sides of the movable leaf plate 21. The top of the limiting baffles 23 is equipped with a spring component that connects the top end to the bottom end of the movable leaf plate 21, and the initial elastic force of the spring component is not less than the weight of the movable leaf plate 21.

[0051] Specifically, the combination of the limiting baffle 23 and the spring component allows the moisture-absorbing component 3 to control the downward angle of the movable leaf plate 21 when it descends to squeeze the water inside the elastic moisture-absorbing sleeve 31, thereby ensuring the stable operation of the squeezing process.

[0052] Please see Figure 4The sum of the widths of the two sets of movable blades 21 is less than the through groove. The moisture-absorbing component 3 is clamped and placed in the gap between the two sets of movable blades 21 in the initial state, and the volume of the moisture-absorbing component 3 exposed outside the water collection tank 2 in the initial state is not less than half the volume of the airbag 32 itself.

[0053] Specifically, there is a gap between the two sets of movable leaf plates 21, and the moisture-absorbing component 3 is partially exposed in the initial state. Therefore, the corresponding moisture-absorbing operation can still be carried out normally when the heat inside the switch cabinet 1 is normal.

[0054] Example 2:

[0055] Please see Figure 6 Components identical or corresponding to those in Embodiment 1 are referred to by the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is that the airbag 32 is filled with a mixed powder 34, which is a mixture of pigment powder and magnetic powder, and the mixing ratio of pigment powder to magnetic powder is 1:1. The initial buoyancy of the airbag 32 is greater than the weight of the mixed powder 34.

[0056] Specifically, after the airbag 32 is destroyed, the mixed powder 34 inside mixes with the water inside the elastic moisture-absorbing sleeve 31. Then the mixture is squeezed out through the drain pipe 5. The color of the liquid discharged from the drain pipe 5 can be used to determine whether the airbag 32 has been damaged.

[0057] Please see Figure 10 The inner wall of the drain pipe 5 has a magnetic groove 55 located below the return spring 53. Symmetrically arranged upward-sloping arc-shaped rubber sheets 54 are mounted on the inner wall of the drain pipe 5, with an inclination angle not exceeding 45 degrees. The arc-shaped rubber sheets 54 are located below the magnetic groove 55. The surface of the arc-shaped rubber sheets 54 away from the inner wall of the drain pipe 5 is coated with a magnetic coating that attracts the magnetic groove 55, while the magnetic coating and magnetic powder repel each other. Warning color blocks are equidistantly coated on the surface of the magnetic coating, and the magnetic attraction between the magnetic groove 55 and the magnetic coating is greater than the elastic inertia of the arc-shaped rubber sheet 54 itself.

[0058] Specifically, if the airbag 32 is damaged during unattended operation and the liquid inside the drain pipe 5 has been drained, the alarm signal for the damage to the airbag 32 cannot be effectively transmitted. On this basis, during the discharge of the mixed liquid, the magnetic powder mixed in the water flow will generate a corresponding repulsive effect when passing through the arc-shaped rubber sheet 54, thereby pushing the arc-shaped rubber sheet 54 to flip up and inward to attract into the magnetic groove 55. Then, the alarm color block in a stable adsorption and constraint state can be used to determine that the airbag 32 inside the switch cabinet 1 is damaged.

[0059] The width of the arc-shaped rubber sheet 54 is smaller than that of the arc-shaped elastic sheet 52, and the initial state of the arc-shaped rubber sheet 54 is isolated from the magnetic groove 55.

[0060] Specifically, the edge of the arc-shaped rubber sheet 54 is located inside the projection of the arc-shaped elastic sheet 52, so it will not obstruct the downward flow of water when the arc-shaped elastic sheet 52 bends down to drain, thus ensuring normal drainage.

[0061] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.

Claims

1. A dehumidification and drainage type self-early warning switch cabinet, comprising a switch cabinet body (1), a water collection tank (2), a moisture-absorbing component (3), and a drain pipe (5), characterized in that, A water collection tank (2) is installed on the rear wall of the switch cabinet (1). The top of the water collection tank (2) is provided with a through groove. The inner walls on both sides of the through groove are connected to movable leaf plates (21) by hinges. The interior of the movable leaf plates (21) is provided with drainage holes (22). Moisture-absorbing components (3) are arranged on the inner sides of the two sets of movable leaf plates (21). The moisture-absorbing components (3) include air bags (32). The outer surface of the air bags (32) is covered with an elastic moisture-absorbing sleeve (31). The airbag (32) is connected to a pull cable (41) at its tail end. The bottom of the water collection tank (2) is connected to a drain pipe (5) extending to the outside of the switch cabinet (1). The tail end of the drain pipe (5) is made of transparent material. The inner wall of the tail end of the drain pipe (5) is fixed with a one-way valve (51) arranged vertically and an arc-shaped elastic piece (52). The bottom end of the arc-shaped elastic piece (52) is connected to a return spring (53) whose tail end is connected to the inner wall of the drain pipe (5). The airbag (32) is filled with a mixed powder (34), which is a mixture of pigment powder and magnetic powder, and the mixing ratio of pigment powder and magnetic powder is 1:1-3:

2. The initial buoyancy of the airbag (32) is greater than the weight of the mixed powder (34). The inner wall of the drain pipe (5) is provided with a magnetic groove (55) located below the reset spring (53). The inner wall of the drain pipe (5) is symmetrically equipped with an upwardly inclined arc-shaped rubber sheet (54), and the inclination angle of the arc-shaped rubber sheet (54) is not greater than 45 degrees. The arc-shaped rubber sheet (54) is located below the magnetic groove (55). The surface of the arc-shaped rubber sheet (54) away from the inner wall of the drain pipe (5) is coated with a magnetic coating that attracts the magnetic groove (55), and the magnetic coating and the magnetic powder repel each other. The width of the arc-shaped rubber sheet (54) is smaller than that of the arc-shaped elastic sheet (52), and the initial state of the arc-shaped rubber sheet (54) is isolated from the magnetic groove (55); The surface of the magnetic coating is coated with warning color blocks at equal intervals, and the magnetic attraction between the magnetic groove (55) and the magnetic coating is greater than the elastic inertia of the arc-shaped rubber sheet (54).

2. The dehumidification and drainage type self-early warning switch cabinet according to claim 1, characterized in that, The bottom end of the arc-shaped elastic sheet (52) is provided with warning rings that spread outward from the center, and the color of the warning rings gradually deepens from the center outward.

3. The dehumidification and drainage type self-early warning switch cabinet according to claim 1, characterized in that, The outer side of the elastic moisture-absorbing sleeve (31) is covered with an insulating elastic film (33), and the surface of the insulating elastic film (33) is provided with holes. The surface of the insulating elastic film (33) is coated with a water-proof coating.

4. A dehumidification and drainage type self-early warning switch cabinet according to claim 1, characterized in that, The bottom wall of the water collection tank (2) is equipped with a reset magnetic strip plate (4) located on one side of the drain pipe (5). The surface of the pull cable (41) is fitted with a magnetic ring (42) that attracts the reset magnetic strip plate (4). The attraction between the reset magnetic strip plate (4) and the magnetic ring (42) is less than 1N. The tail end of the pull cable (41) is fixed to one end of the top surface of the reset magnetic strip plate (4).

5. A dehumidification and drainage type self-early warning switch cabinet according to claim 1, characterized in that, The inner top wall of the water collection tank (2) is symmetrically equipped with L-shaped limiting baffles (23), and the limiting baffles (23) are located on both sides of the movable leaf plate (21). The top of the limiting baffles (23) is equipped with a spring that connects the top end to the bottom end of the movable leaf plate (21), and the initial elastic force of the spring is not less than the weight of the movable leaf plate (21).

6. A dehumidification and drainage type self-early warning switch cabinet according to claim 1, characterized in that, The sum of the widths of the two sets of movable leaf plates (21) is less than the through groove. The moisture-absorbing element (3) is clamped and placed in the gap between the two sets of movable leaf plates (21) in the initial state, and the volume of the moisture-absorbing element (3) exposed outside the water collection tank (2) in the initial state is not less than half the volume of the air bag (32) itself.

Images