PLC control cabinet

Abstract

The utility model solves the problem that a drying agent needs to be added frequently to dehumidify the interior of a control cabinet, and relates to the field of control cabinets, in particular to a PLC (Programmable Logic Controller) control cabinet, which comprises a control cabinet body and a cabinet door movably arranged on the control cabinet body through a hinge, the dehumidification assembly comprises a storage box installed on the cabinet door and a dehumidification frame body, the dehumidification frame body is located below the storage box, a pipeline structure for intermittently introducing a drying agent inwards along the surface of the dehumidification frame body is installed at the bottom of the storage box, and a water guide pipe penetrating through the cabinet door is connected to the bottom of the dehumidification frame body; and a circular filter plate is mounted on the inner wall of the water guide pipe. According to the utility model, a certain amount of desiccant is discontinuously put into the flat dehumidification frame body according to the humidity condition in the control cabinet, moisture in the control cabinet is effectively absorbed by the desiccant, and the converted water is discharged out of the control cabinet along the water guide pipe, so that the risk of corrosion in the control cabinet is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of control cabinet technology, specifically a PLC control cabinet. Background Technology

[0002] PLC control cabinets centrally house the PLC and related electrical components, making system control simpler, easier to manage and maintain. They automate production processes through programmed control, replacing traditional mechanical switches or manual operation. During operation, the electrical equipment in the PLC control cabinet generates heat. If the external ambient temperature is low, condensation easily forms when the hot air inside the cabinet comes into contact with the cooling surfaces. These condensed water droplets accumulate on the equipment, leading to moisture buildup. High levels of moisture can cause malfunctions in the electrical equipment within the PLC control cabinet, such as short circuits, corrosion, and signal interference. Therefore, effective measures must be taken to control and remove moisture to ensure the long-term stable operation of the equipment. Common dehumidification methods for control cabinets include air conditioning or constant temperature and humidity equipment, heaters, dehumidifiers, and desiccants. Desiccants, with their strong moisture absorption capacity, can quickly and effectively reduce moisture inside the cabinet. They also require little or no additional power to operate continuously, making them ideal for the enclosed space of a PLC control cabinet. However, under normal circumstances, desiccants need to be added frequently, which can make dehumidification work cumbersome. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a PLC control cabinet to solve the problem mentioned in the background art of using desiccant to dehumidify the control cabinet, which requires frequent replenishment.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a PLC control cabinet, including a control cabinet body and a cabinet door that is movably installed on the control cabinet body via a hinge, wherein a dehumidification component is installed on the cabinet door;

[0005] The dehumidification assembly includes a storage box installed on the cabinet door and a dehumidification frame, with the dehumidification frame located below the storage box. A pipeline structure is installed at the bottom of the storage box to intermittently introduce desiccant into the dehumidification frame surface. A water guide pipe passing through the cabinet door is connected to the bottom of the dehumidification frame, and a circular filter plate is installed on the inner wall of the water guide pipe.

[0006] Preferably, the surface of the dehumidification frame is provided with a rectangular groove, and a perforated plate and a breathable waterproof cloth are installed sequentially from the inside to the outside on the inner wall of the rectangular groove.

[0007] Preferably, the dehumidification frame is composed of a rectangular frame and a trapezoidal frame installed at the bottom of the rectangular frame, and the width of the trapezoidal frame gradually decreases from top to bottom, with an arc-shaped strip installed on the inner wall of the trapezoidal frame.

[0008] Two sloping panels are installed at the bottom of the trapezoidal frame, and the lowest point of the two sloping panels is located at the top edge of the water pipe.

[0009] Preferably, the piping structure includes a straight pipe connected to the bottom of the storage box, a four-way pipe inserted along the surface of the dehumidification frame connected to the bottom of the straight pipe, and a control valve installed on the straight pipe.

[0010] Preferably, a humidity sensor is installed on the cabinet door, and a high-precision pressure sensor is installed on the bottom wall of the trapezoidal frame below the inclined panel, and the humidity sensor, the high-precision pressure sensor and the control valve are electrically connected.

[0011] Preferably, the storage box is equipped with an electric telescopic rod at the bottom, and a rigid plate is installed at the free end of the electric telescopic rod. An absorbent sponge adapted to the length and width of the rectangular frame is glued to the bottom of the rigid plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] Based on the humidity level, this utility model intermittently adds a certain amount of desiccant into the flat dehumidification frame. The desiccant effectively absorbs the moisture inside the control cabinet, and the converted water is discharged out of the control cabinet through the water pipe, thereby effectively reducing the risk of corrosion inside the control cabinet and reducing the frequency of manual desiccant addition.

[0014] This invention utilizes a breathable and waterproof fabric to effectively prevent water from flowing into the control cabinet from being converted inside the dehumidification frame. Furthermore, it is combined with a perforated plate to shape the breathable and waterproof fabric, preventing it from being excessively stretched when desiccant is added to the dehumidification frame. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the dehumidification component of this utility model;

[0017] Figure 3 This is a schematic diagram showing the disassembled structure of the dehumidification frame and the perforated plate of this utility model;

[0018] Figure 4 This is a schematic diagram of the water guide pipe and circular filter plate of this utility model.

[0019] In the diagram: 1. Control cabinet body; 2. Cabinet door; 3. Dehumidification assembly; 301. Storage box; 3011. Electric telescopic rod; 3012. Rigid board; 3013. Absorbent sponge; 302. Dehumidification frame; 3021. Perforated plate; 3022. Breathable and waterproof fabric; 3023. Curved strip; 3024. Slanted panel; 303. Piping structure; 3031. Straight pipe; 3032. Four-way pipe; 3033. Control valve; 304. Water guide pipe; 305. Circular filter plate; 4. Humidity sensor; 5. High-precision pressure sensor. Detailed Implementation

[0020] 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.

[0021] To address the issue of excessive humidity inside the existing control cabinet, please refer to [link / reference needed]. Figures 1-4 This utility model proposes a PLC control cabinet that can effectively reduce humidity inside the control cabinet. The control cabinet has a control cabinet body 1 with functions and structure basically the same as the prior art, and a cabinet door 2 that is movably installed on the control cabinet body 1 by hinges. On this basis, by adding a dehumidification component 3 to the cabinet door 2, the purpose of dehumidifying the internal space of the control cabinet can be effectively achieved.

[0022] Specifically, following the above, the dehumidification assembly 3 includes a storage box 301 installed on the cabinet door 2 and a dehumidification frame 302, with the dehumidification frame 302 located below the storage box 301. The top of the storage box 301 has a dispensing port, which is closed when not needed. The inner wall of the dehumidification frame 302 has an anti-corrosion coating consistent with existing technology to increase its service life. A desiccant is intermittently introduced into the dehumidification frame 302 along its surface at the bottom of the storage box 301. The piping structure 303 includes a water pipe 304 connected to the bottom of the dehumidification frame 302, which passes through the cabinet door 2. A circular filter plate 305 is installed on the inner wall of the water pipe 304. A storage box 301 stores a large amount of desiccant at a time, and, as needed, the desiccant is added to the dehumidification frame 302 in conjunction with the piping structure 303. The dehumidification frame 302 is predominantly flat, allowing for a wide distribution area of ​​the added desiccant. This effectively absorbs moisture inside the control cabinet, reducing the risk of corrosion. The water converted from the moisture absorbed by the desiccant is discharged outside the control cabinet through the water pipe 304. Simultaneously, the circular filter plate 305 effectively intercepts any remaining desiccant inside the dehumidification frame 302. This also effectively reduces the frequency of manual desiccant addition.

[0023] The pipeline structure 303 includes a straight pipe 3031 connected to the bottom of the storage box 301, a four-way pipe 3032 inserted along the surface of the dehumidification frame 302 connected to the bottom of the straight pipe 3031, a control valve 3033 installed on the straight pipe 3031, a humidity sensor 4 installed on the cabinet door 2, a high-precision pressure sensor 5 installed on the bottom wall of the trapezoidal frame below the inclined panel 3024, and the humidity sensor 4, the high-precision pressure sensor 5 and the control valve 3033 are electrically connected. Two inclined panels 3024 are installed at the bottom of the trapezoidal frame, and the lowest point of the two inclined panels 3024 is located at the top edge of the water guide pipe 304. By utilizing humidity sensor 4 to monitor the humidity inside the control cabinet in real time, when the humidity reaches a certain level, control valve 3033 is opened to ensure the unobstructed flow of pipe structure 303. The desiccant inside storage tank 301 then disperses along straight pipe 3031 into four-way pipe 3032, and subsequently, desiccant is added to three points along the surface of dehumidification frame 302, resulting in a relatively uniform distribution of desiccant in the center and on both sides of dehumidification frame 302. Furthermore, high-precision pressure sensor 5 continuously monitors the weight of the desiccant on top of inclined panel 3024. When the weight exceeds a set value, control valve 3033 closes promptly, sealing the internal channels of pipe structure 303, effectively preventing excessive desiccant addition and ensuring the storage tank 301 remains sealed, preventing excessive contact between the stored desiccant and air. The inclined panel 3024 also accelerates the discharge of converted water through guide pipe 304.

[0024] like Figure 3 As shown, a rectangular groove is provided on the surface of the dehumidification frame 302. A perforated plate 3021 and a breathable waterproof cloth 3022 are installed sequentially from the inside to the outside on the inner wall of the rectangular groove. The perforated plate 3021 is mainly used for shaping the breathable waterproof cloth 3022, while not obstructing the flow of high humidity air in the control cabinet into the dehumidification frame 302.

[0025] Under normal circumstances, even after all the desiccant inside the dehumidifier frame 302 has been converted into water and flowed away, some water droplets will still remain on its inner wall. To effectively solve this problem... Figures 1-3As shown, the dehumidification frame 302 consists of a rectangular frame and a trapezoidal frame installed at the bottom of the rectangular frame, with the width of the trapezoidal frame gradually decreasing from top to bottom. An arc-shaped strip 3023 is installed on the inner wall of the trapezoidal frame. An electric telescopic rod 3011 is installed at the bottom of the storage box 301. A rigid plate 3012 is installed at the free end of the electric telescopic rod 3011. A water-absorbing sponge 3013, matching the length and width dimensions of the rectangular frame, is glued to the bottom of the rigid plate 3012. The dehumidification mechanism is activated by extending the electric telescopic rod 3011. The rigid board 3012 and the absorbent sponge 3013 move downwards. The absorbent sponge 3013 absorbs the water droplets remaining on the inner wall of the dehumidification frame 302. As the absorbent sponge 3013 enters the space of the trapezoidal frame, the width of the trapezoidal frame gradually narrows from top to bottom, causing the absorbent sponge 3013 to be squeezed. Combined with the additional squeezing force from the arc strip 3023, the water inside the absorbent sponge 3013 can be squeezed out, thereby effectively ensuring the dryness of the inside of the dehumidification frame 302.

[0026] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PLC control cabinet comprising a cabinet body (1) and a cabinet door (2) which is movably mounted on the cabinet body (1) by a hinge, characterized in that: The cabinet door (2) is provided with a dehumidification assembly (3); The dehumidification assembly (3) comprises a storage box (301) and a dehumidification frame (302), the dehumidification frame (302) is located below the storage box (301), an intermittent pipe structure (303) for guiding dry agent inward along the surface of the dehumidification frame (302) is arranged at the bottom of the storage box (301), the bottom of the dehumidification frame (302) is connected with a water guide pipe (304) penetrating through the cabinet door (2), and a circular filter plate (305) is arranged on the inner wall of the water guide pipe (304).

2. The PLC control cabinet according to claim 1, characterized in that: The surface of the dehumidification frame (302) is provided with a rectangular groove, and a slot hole plate (3021) and a waterproof air-permeable cloth (3022) are sequentially arranged on the inner wall of the rectangular groove from inside to outside.

3. The PLC control cabinet according to claim 2, characterized in that: The dehumidification frame (302) is composed of a rectangular frame and a trapezoidal frame arranged at the bottom of the rectangular frame, the width of the trapezoidal frame gradually decreases from top to bottom, and an arc-shaped strip (3023) is arranged on the inner wall of the trapezoidal frame. Two inclined plates (3024) are arranged at the bottom of the trapezoidal frame, and the lowest parts of the two inclined plates (3024) are located at the top edge of the water guide pipe (304).

4. The PLC control cabinet according to claim 1, characterized in that: The pipe structure (303) comprises a straight-through pipe (3031) connected at the bottom of the storage box (301), a four-way pipe (3032) inserted along the surface of the dehumidification frame (302) is connected at the bottom of the straight-through pipe (3031), and a control valve (3033) is arranged on the straight-through pipe (3031).

5. The PLC control cabinet according to claim 1, characterized in that: A humidity sensor (4) is arranged on the cabinet door (2), a high-precision pressure sensor (5) is arranged below the inclined plate (3024) on the bottom wall of the trapezoidal frame, and the humidity sensor (4) and the high-precision pressure sensor (5) are electrically connected with the control valve (3033).

6. The PLC control cabinet according to claim 1, characterized in that: An electric telescopic rod (3011) is arranged at the bottom of the storage box (301), a hard plate (3012) is arranged at the free end of the electric telescopic rod (3011), and a water-absorbing sponge (3013) with a size matching the length and width of the rectangular frame is glued to the bottom of the hard plate (3012).

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