CN209461809U - A kind of terminal box for dehumidifying, dehumidifying - Google Patents

Abstract

The utility model discloses a terminal box for dehumidification and dehumidification, which comprises an intelligent box body, and a dehumidification box body arranged in the intelligent box body; a drying device is arranged in the middle of the dehumidification box body, and the upper and lower two An upper heating device and a lower heating device are respectively provided at each end, an upper two-way fan is arranged between the upper heating device and the top of the dehumidification box, and a lower two-way fan is arranged between the lower heating device and the bottom of the dehumidification box. The fan, humidity detection sensor and PLC controller have a simple structure, through the air inlet and outlet, and through the drying device to dry and heat the incoming gas, and can also dehumidify the dryer, effectively preventing heating and cooling The resulting condensation will damage the smart terminal box.

Description

A terminal box for dehumidification and dehumidification

【Technical field】

The utility model mainly relates to electrical equipment, in particular to a terminal box used for dehumidification and dehumidification.

【Background technique】

The substation terminal box is the intermediate link between outdoor electrical equipment and indoor measurement and control, protection, communication and other equipment, and is generally installed near the equipment. When the air is humid, especially in the rainy season, moisture and condensation in the outdoor switch terminal box will easily lead to a decrease in the insulation resistance of the DC secondary circuit to the ground. In severe cases, the insulation resistance will drop to zero, thereby forming a DC positive or negative power supply. . If the two points of DC are grounded, the DC fuse will be blown, the protection will refuse to operate or malfunction, and even damage the equipment, seriously threatening the safe operation of the power grid. If the terminal box is damp, the terminal row screws and connecting pieces will be rusted, which will cause poor contact of the secondary terminals. It will also cause the current circuit terminals to heat up or even open, causing the protection to refuse to operate or malfunction, causing accidents. Poor contact between the transformer voltage and the switch and temperature signal terminals will cause abnormal operation of the measurement and control and protection devices, and false signals, resulting in misjudgments by operators and wrong analysis.

Observe the terminal boxes of various electrical equipment (switches, isolating switches, voltage transformers, etc.) in the current power system, check the materials, production, installation process and tide driving circuits of various terminal boxes, and find that the moisture in the terminal box is heavy, causing terminals The terminals and screws of the brand are easy to rust, and the inside of the box is easy to rust, which poses a serious threat to the safe and reliable operation of electrical equipment. For example, the screws of some terminal boxes are made of iron, which is easy to rust; the door locks of some terminal boxes do not match in size, are not tight, and are easy to loosen; the fireproof seals of some terminal boxes are not tight, causing water ingress; The power supply or the circuit is not connected, resulting in poor tide driving effect; some terminal boxes are inconvenient to carry out the tide driving operation due to the defects of the original design; and the management is not in place, and the box is not opened in time for ventilation and tide driving after the thunderstorm.

In view of the moisture condensation and water accumulation inside the substation terminal box at present, in order to achieve the purpose of automatic and sustainable dehumidification of the substation terminal box equipment, a sustainable automatic dehumidification system for the substation terminal box has been developed to prevent the terminal box from being damp. Accidents are significant.

At present, most substations at home and abroad use traditional heating and tide-removing devices. Often, the water vapor formed after heating by the tide-removing device cannot be discharged for a long time and condenses on the top of the terminal box, forming dewdrops hanging, and eventually dripping on terminal blocks and other equipment. , causing short circuit or grounding of the equipment, and the effect of tide driving is not ideal. In addition, ordinary heating and moisture-dispelling devices are also easily damaged, and there may even be problems such as heating plates overheating and burning out operating equipment due to long-term heating. Moreover, general tide-removing heating devices do not have communication and networking functions. If you need to know the working status of the temperature and humidity controllers in the terminal box, you must inspect them one by one. The workload is heavy and the efficiency is not high, and it is impossible to understand their work in real time. state.

Traditional dehumidification measures for terminal boxes:

Install sealing strip

Install plastic sealing strips on the box and cabinet door to prevent rainwater from entering the inside of the box, which has a certain effect. According to many years of operating experience, the sealing strip is easy to corrode and peel off, and basically needs to be replaced every 2-3 years, and in the case of high external humidity, the humidity inside the cabinet cannot be effectively reduced, and the equipment in the cabinet will become moldy , The corrosion situation is serious, and the safe operation of the equipment cannot be guaranteed.

Add heater

At present, it is widely used in the power system to match the humidity probe with a heater. When the humidity is too high, the heater is activated to heat the humid air and make the heated humid air rise. When the hot and humid air rises and hits the top of the cabinet, it will condense and dew will be generated after cooling, which will reduce the insulation level and is not conducive to the safe operation of the equipment. The moisture still remains inside the cabinet and cannot effectively reduce the humidity inside the cabinet equipment. In the south, the temperature is high in summer, the humidity is high, and the heat generated by the operating components in the cabinet is serious, and the skin of various cables is seriously aging, which is likely to cause equipment failure.

【Content of utility model】

In order to overcome the shortcomings of the above-mentioned prior art, the purpose of this utility model is to provide a simple structure, which can dry the smart box and will not affect the components in the smart box due to the generated condensation. damp, dehumidified terminal box.

In order to achieve the above purpose, the utility model adopts the following technical solutions, a terminal box for dehumidification and dehumidification, including a smart box, a dehumidification box located in the smart box, the interior of the dehumidification box and the smart box The outside of the box is connected through the first outer ventilation pipe and the second outer ventilation pipe, and the inside of the dehumidification box and the inside of the smart box are connected through the first inner ventilation pipe and the second inner ventilation pipe. A first solenoid valve is provided on an external ventilation pipe, a second solenoid valve is provided on the second external ventilation pipe, a third solenoid valve is provided on the first internal ventilation pipe, and a third solenoid valve is provided on the second internal ventilation pipe. There is a fourth electromagnetic valve on the ventilation pipe;

The middle part of the dehumidification box is provided with a drying device, the upper and lower ends of the drying device are respectively provided with an upper heating device and a lower heating device, and an upper heating device and a top of the dehumidification box are provided between the upper heating device and the top of the dehumidification box. A two-way fan, a lower two-way fan is provided between the lower heating device and the bottom of the dehumidification box;

The dehumidification box is provided with a first humidity detection sensor for detecting humidity in the drying device, and the smart box is provided with a second humidity detection sensor for detecting humidity in the smart box;

It also includes a PLC controller, the output ends of the first humidity detection sensor and the second humidity sensor are electrically connected to the input end of the PLC controller, and the output ends of the PLC controller are respectively connected to the first solenoid valve and the second humidity sensor. The solenoid valve, the third solenoid valve, the fourth solenoid valve, the upper heating device, the lower heating device, the upper two-way fan and the lower two-way fan are electrically connected.

The first external ventilation pipe is arranged at the lower end of the intelligent box, the second external ventilation pipe is arranged at the top of the intelligent box, and the third external ventilation pipe is provided with a filter screen located at the bottom of the intelligent box. The mouthpiece of the third outer ventilation pipe.

A display is also inlaid outside the smart box, and the display is electrically connected to the PLC.

The upper heating device and the lower heating device are the same heating device, which consists of multiple electric heating tubes.

The drying device includes an upper ventilating plate and a lower ventilating plate fixedly arranged at the upper and lower ends of the dehumidification box respectively, and a silica gel adsorbent arranged between the upper ventilating plate and the lower ventilating plate. An upper two-way electromagnetic valve is arranged on the hole, and a lower two-way electromagnetic valve is arranged on the air hole of the lower air-permeable plate.

The beneficial effect of the utility model is: the structure is simple, through the provided air inlet and outlet, and through the drying device to dry and heat the incoming gas, it can also dehumidify the dryer, effectively preventing the occurrence of Condensation will cause damage to the intelligent terminal box.

【Description of drawings】

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a schematic diagram of the electrical connection structure in the utility model;

Fig. 3 is a schematic structural view of the drying device in the present invention.

In the figure: 1-smart box; 2-dehumidification box; 3-the first external ventilation pipe; 4-the second external ventilation pipe; 5-the first internal ventilation pipe; 6-the second internal ventilation pipe; 7-the first 1-solenoid valve; 8-second solenoid valve; 9-third solenoid valve; 10-fourth solenoid valve; 11-lower two-way electric fan; 12-bottom heating device; 13-upper two-way electric fan; 14-upper heating device; 15 -first humidity sensor; 16-second humidity sensor; 17-display; 18-drying device; 19-filter; Solenoid valve; 24-silica gel adsorbent.

【Detailed ways】

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiment is only a part of the embodiment of the utility model, not all the embodiments, and is not intended to limit the disclosed scope of the utility model. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts disclosed in the present invention. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

Various structural schematic diagrams according to the disclosed embodiments of the utility model are shown in the accompanying drawings. The figures are not drawn to scale, with certain details exaggerated and possibly omitted for the purpose of clarity. The shapes of various regions and layers shown in the figure and their relative sizes and positional relationships are only exemplary, and may deviate due to manufacturing tolerances or technical limitations in practice, and those skilled in the art may Regions/layers with different shapes, sizes, and relative positions can be additionally designed as needed.

In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, the layer/element can be directly on the other layer/element, or there may be intervening layers in between. /element. Additionally, if a layer/element is "on" another layer/element in one orientation, the layer/element can be located "below" the other layer/element when the orientation is reversed.

It should be noted that the terms "first" and "second" in the specification and claims of the present utility model and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence . It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Figures 1-3, a terminal box for dehumidification and dehumidification in the present invention includes a smart box 1, a dehumidification box 2 inside the smart box 1, and the interior of the dehumidification box 2 is connected with the smart box. The outside of the box 1 is connected through the first external ventilation pipe 3 and the second external ventilation pipe 4, and the inside of the dehumidification box 2 and the inside of the smart box 1 are ventilated through the first internal ventilation pipe 5 and the second internal ventilation. Pipeline 6, first electromagnetic valve 7 is provided on the first external ventilation pipeline 3, second electromagnetic valve 8 is provided on the second external ventilation pipeline 4, and second electromagnetic valve 8 is provided on the first internal ventilation pipeline 5. There is a third solenoid valve 9, and the second internal ventilation pipe 6 is provided with a fourth solenoid valve 10; the first external ventilation pipe 3 is arranged under the smart box 1 and is mainly used for air intake. The second external ventilation pipe 4 is mainly to discharge the gas in the dehumidification box, and is arranged above the intelligent box 1, and the first internal ventilation pipe 5 is mainly to pass the gas in the intelligent box 1 into In the dehumidification box 2, the second internal ventilation pipe 6 mainly passes the dehumidified and heated gas in the dehumidification box 2 into the smart box 1, and the first ventilation pipe 5 is located at The lower part of the intelligent box body 1, the second internal ventilation pipeline 6 is located at the upper part of the intelligent box body 1; the first electromagnetic valve 7, the second electromagnetic valve 8, the third electromagnetic valve 9 and the fourth electromagnetic valve 10 Respectively control the ventilation volumes of the first external ventilation pipeline, the second external ventilation pipeline, the first internal ventilation pipeline and the fourth internal ventilation pipeline;

The middle part of the dehumidification box 2 is provided with a drying device 18, the upper and lower ends of the drying device 18 are respectively provided with an upper heating device 14 and a lower heating device 12, and the upper heating device 14 is connected with the dehumidification box 2. An upper two-way fan 13 is arranged between the top of the top, and a lower two-way fan 11 is arranged between the bottom of the lower heating device 12 and the dehumidification box 2;

The dehumidification box 2 is mainly used to heat and dehumidify the incoming gas, so as to meet the humidity requirements inside the smart box 1. Specifically, the drying device includes a set of The upper air-permeable plate 20 and the lower air-permeable plate 21, the silica gel adsorbent 24 between the upper air-permeable plate 20 and the lower air-permeable plate 21, the air hole of the upper air-permeable plate 20 is provided with an upper two-way solenoid valve 22, the The air hole of the lower air-permeable plate 21 is provided with a lower two-way solenoid valve 23. While the air-permeable plate provided can breathe, the silica gel adsorbent between the air-permeable plates can be fixed. The silica gel adsorbent provided has a strong hygroscopicity. At the same time, it can discharge the moisture in the adsorbent after moisture absorption under the condition of heating.

The dehumidification box 2 is provided with a first humidity detection sensor 15 for detecting the humidity in the drying device 18, and the smart box 1 is provided with a second humidity detection sensor 16 for detecting the humidity in the smart box 1 The first temperature detection sensor 15 is used to detect the humidity of the silica gel adsorbent in the drying device 18, and the detected value is sent to the PLC controller in time, compared with the set value, the second described The humidity detection sensor 16 is used to detect the value of the humidity in the smart box 1, and sends the detected value to the PLC controller for comparison and processing.

It also includes a PLC controller, the output ends of the first humidity detection sensor 15 and the second humidity sensor 16 are electrically connected to the input ends of the PLC controller, and the output ends of the PLC controller are respectively connected to the first electromagnetic valve 7 , the second solenoid valve 8, the third solenoid valve 9, the fourth solenoid valve 10, the upper heating device 14, the lower heating device 12, the upper bidirectional fan 13 and the lower bidirectional fan 11 are electrically connected.

The function of the PLC controller is mainly to receive the signals sent by each sensor, compare them with the set values, and control the working status of each component according to the compared results, so the PLC control is the most common The controller can be directly purchased according to its function, which belongs to the common knowledge in this technical field, and its model and structure will not be described in detail here.

Specifically in the working process, when the first humidity sensor detects the humidity in the smart box 1, and sends the detected information to the PLC controller, it is compared with the set humidity, and when the humidity is greater than the set value At this time, the PLC controls the first solenoid valve to open, the second solenoid valve to close, the upper two-way solenoid valve and the lower two-way solenoid valve to open, the fourth solenoid valve to open, and the third solenoid valve to close. At the same time, the upper two-way fan, the lower two-way fan, and the upper heating When the device is turned on, the air outside the smart box 1 enters the dehumidification box through the first external pipe for heating, the heated gas is dehumidified through the silica gel adsorbent, and the dehumidified gas enters the smart box through the second internal ventilation pipe In the body 1, the purpose of rapid dehumidification is achieved. At the same time, when the second humidity sensor detects that the humidity in the initial dehumidification device is greater than the set value, the PLC controls the first solenoid valve to close, the fourth solenoid valve to close, and the third solenoid valve to close. And the second solenoid valve is opened, the gas in the smart box enters the dehumidification box through the first internal ventilation pipe, and after being heated by the heating device, it is heated and dehumidified for the internal silica gel adsorbent, and the heated and dehumidified air is It is discharged through the second external ventilation pipe to realize the treatment of the silica gel adsorbent;

At the same time, when the humidity inside the smart box is greater than the humidity outside the smart box, the upper two-way solenoid valve and the lower two-way solenoid valve are closed, and the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are all opened. , and then the gas in the dehumidification box is heated and directly enters the interior of the smart box from the inner ventilation pipe, and is directly heated and dehumidified. All components in this embodiment are supplied with power through the external power supply of the smart box, and the electrical connection relationship belongs to common knowledge in the technical field, and will not be described in detail here.

Specifically, in the process of single heating: when the humidity inside the smart box is below 70%, and the temperature is below 5 degrees, the lower two-way fan operates the heater (the lower heating device includes multiple heaters, that is, multiple Heating tube, the heater works for one of the heating tubes). When the heater works for more than 60 minutes, it will automatically switch to another heating tube. When the temperature in the smart box reaches 100 degrees, the heater and the lower two-way fan stop working; When the work exceeds 2 hours, the upper and lower heating devices start at the same time;

Tide drive mode: When the internal humidity of the intelligent box exceeds 80%, and is greater than the external humidity of the intelligent box, the upper and lower two-way fans start, the upper and lower heating devices, the first solenoid valve, the second solenoid valve, the third solenoid valve and the fourth solenoid valve The solenoid valve is opened, the upper and lower two-way solenoid valves are closed, and switched to no desiccant circuit. The fresh air outside the box directly enters the box after passing through the filter and heater to achieve the purpose of rapid dehumidification.

Moisture drive mode 2: When the internal humidity of the smart box exceeds 80% and is less than the external humidity of the smart box, the up and down two-way fan operates, the up and down two-way solenoid valve opens, dehumidifies through the desiccant, and stops when the humidity is below 80% Work, if the internal temperature of the smart box is less than 10 degrees during the working period, and start the single heating mode at the same time,

Silica gel drying mode: When the outdoor humidity is less than 70%, the two-way solenoid valve opens, the second solenoid valve and the fourth solenoid valve close, the two-way solenoid valve switches to the desiccant mode, switches to the conduction mode outside the box, and the fan runs at high speed. The heater starts to drive the desiccant out of moisture, so that it can be reused again.

Further, in order to ensure that the air entering the box is clean, a filter screen 19 is provided on the third external air duct 3 , and the filter screen 19 is located at the mouth of the third external air duct 3 .

Further, in order to be able to monitor the temperature and humidity in real time, a display 17 is embedded outside the smart box 1, and the display 17 is electrically connected to the PLC.

The above content is only to illustrate the technical idea of the utility model, and cannot limit the protection scope of the utility model. Any changes made on the basis of the technical solution according to the technical idea proposed by the utility model all fall into the scope of the utility model. within the scope of protection of the claims.

Claims (5)

1. a kind of terminal box for dehumidifying, dehumidifying, which is characterized in that including intelligent cabinet (1), be located in intelligent cabinet (1) Dehumidifying cabinet (2), the outside of the inside of the dehumidifying cabinet (2) and intelligent cabinet (1) passes through the first outer air vent road (3) It is connected with the second outer air vent road (4), the inside of the inside of the dehumidifying cabinet (2) and intelligent cabinet (1) passes through in first Ventilation pipe (6) in ventilation pipe (5) and second, the first outer air vent road (3) are equipped with the first solenoid valve (7), institute The the second outer air vent road (4) stated is equipped with second solenoid valve (8), and ventilation pipe (5) is equipped with third electricity in described first Magnet valve (9), ventilation pipe (6) is equipped with the 4th solenoid valve (10) in described second；

The middle part of the dehumidifying cabinet (2) is equipped with drying device (18), and the upper and lower ends of the drying device (18) are distinguished Equipped with upper heating device (14) and lower heating device (12), the upper heating device (14) and dehumidifying cabinet (2) top it Between be equipped with upper bidirectional fan (13), the lower heating device (12) with dehumidifying cabinet (2) bottom between be equipped with down two-way wind It fans (11)；

The first moisture detection sensor for detecting drying device (18) interior humidity is equipped in the dehumidifying cabinet (2) (15), the second humidity sensor (16) for detecting intelligent cabinet (1) interior humidity is equipped in the intelligent cabinet (1)；

It further include PLC controller, the output end of first moisture detection sensor (15) and the second humidity sensor (16) Be electrically connected with the input terminal of PLC controller, the output end of the PLC controller respectively with the first solenoid valve (7), the second electromagnetism Valve (8), third solenoid valve (9), the 4th solenoid valve (10), upper heating device (14), lower heating device (12), upper bidirectional fan (13) it is electrically connected with lower bidirectional fan (11).

2. a kind of terminal box for dehumidifying, dehumidifying according to claim 1, which is characterized in that logical outside described first Feed channel (3) is located at the lower end of intelligent cabinet (1), and the second outer air vent road (4) is located at the top of intelligent cabinet (1), The first outer air vent road (3) is equipped with strainer (19), which is located at the nozzle in the first outer air vent road (3).

3. a kind of terminal box for dehumidifying, dehumidifying according to claim 1, which is characterized in that the intelligent cabinet (1) it is also inlaid with outside display (17), which is electrically connected with the PLC.

4. a kind of terminal box for dehumidifying, dehumidifying according to claim 1, which is characterized in that the upper heating dress Setting (14) and lower heating device (12) is same heating device, is made of more electric heating tubes.

5. a kind of terminal box for dehumidifying, dehumidifying according to claim 1, which is characterized in that the drying device (18) include that fixed dehumidifying cabinet (2) the interior upper and lower ends that are located at are respectively equipped with air permeable plate (20) and lower air permeable plate (21), be located at Silica gel absorber (24) between upper air permeable plate (20) and lower air permeable plate (21) is set on the air hole of the upper air permeable plate (20) Have upper bidirectional electromagnetic valve (22), the air hole of the lower air permeable plate (21) is equipped with lower bidirectional electromagnetic valve (23).