CN112332230B

CN112332230B - A electric power cabinet for dehumidification

Info

Publication number: CN112332230B
Application number: CN202011187399.0A
Authority: CN
Inventors: 孙浩然; 宋东明; 吕俊红; 马威; 杨淑梅; 王铭伟; 吴鹏; 李东明
Original assignee: Ningling County Power Supply Co Of State Grid Henan Electric Power Co
Current assignee: Ningling County Power Supply Co Of State Grid Henan Electric Power Co
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2022-08-12
Anticipated expiration: 2040-10-29
Also published as: CN112332230A

Abstract

The invention provides an electric power cabinet for dehumidification, which comprises a switch cabinet body, wherein a cable trench for cable routing is arranged at the bottom of the switch cabinet body, a sealed plastic baffle is paved on the periphery of the inner wall of the cable trench, a first dehumidification bag is arranged at the bottom of the cable trench, a first dehumidification mechanism is arranged at the upper end of the cable trench, and a second dehumidification mechanism is arranged at the upper end inside the switch cabinet. The invention has the advantages of convenient installation, wide application and easy popularization.

Description

A electric power cabinet for dehumidification

Technical Field

The invention relates to the technical field of dehumidification of electric power cabinets, in particular to an electric power cabinet for dehumidification.

Background

At present, a power distribution station is the most basic unit at the bottom layer of a power distribution network, the distribution range is wide, the quantity is large, and a 10kv (20 kv) metal sealing switch cabinet is the most direct equipment for supplying power to users; the operation reliability of the power supply device is directly related to the power supply quality and the power supply reliability. On-site operation experience shows that air quality in a switch cabinet of a station is poor (moist and dew condensation), in the long-term operation process, the dew condensation can cause discharge between buses in a bus chamber of the switch cabinet and between the buses and the ground, so that accidents such as creepage, pollution flashover and the like are generated, all devices in a transformer substation take very important tasks in a power grid, wherein primary cables, main devices, secondary devices and the like are important components of the transformer substation, but are easily influenced by external environmental factors, such as accumulated water in a cable trench, indoor moisture regain is easily caused by changes of relative humidity and temperature difference in rainy seasons and day and night alternation, so that the moisture condensation occurs inside and outside the devices, the insulation reduction of the devices is caused, the poor contact of terminals is caused, the contact of relays inside the devices is damaged, direct current grounding is realized, the short circuit grounding trip is caused by the breakdown of discharge insulation of the switch cabinet, and the like accidents, the accident handling difficulty is high, the time is consumed, and the normal operation of the power grid is seriously influenced.

At present, a heater and a condensation dehumidifier are installed on partial equipment, and an air conditioner and a dehumidifier are installed indoors, but because the problems are not solved fundamentally in the indoor environment, the equipment is lack of management state for a long time, the power of the partial dehumidification equipment is too low, and the like, and the moisture condensation phenomenon still exists on partial equipment from the daily operation condition, so that the potential safety hazard is very large.

Disclosure of Invention

The invention aims to solve the technical problem of dehumidifying the electric power cabinet arranged above the cable trench and the cable trench, and provides an electric power cabinet for dehumidification.

The object of the invention is achieved in the following way:

the utility model provides an electric power cabinet for dehumidification, includes the cubical switchboard body, cubical switchboard body bottom is equipped with the cable pit that is used for the cable to walk the line, sealed plastic baffle is laid to cable pit inner wall week side, is equipped with first dehumidification bag bottom the cable pit, and the cable pit upper end is equipped with first dehumidification mechanism, the inside upper end of cubical switchboard is equipped with second dehumidification mechanism.

An electrical element connected with a cable is arranged in the switch cabinet body, a lower drainage plate is arranged at the lower end of the electrical element, an upper drainage plate is arranged at the upper end of the electrical element, the included angle between the upper drainage plate and the lower drainage plate is 30-90 degrees, and the included angle between the lower drainage plate and the horizontal plane is 100-180 degrees.

The first dehumidifying mechanism comprises a first dehumidifying frame arranged along the width direction of the cable trench, a second dehumidifying bag is arranged on the first dehumidifying frame, and the second dehumidifying bag is a lime bag.

The second dehumidification mechanism comprises a second dehumidification frame arranged along the width direction of the switch cabinet body, a third dehumidification bag is arranged on the second dehumidification frame, and the third dehumidification bag is a lime bag.

And a refrigerating pipe is arranged below the second dehumidifying rack.

One side of the lower end of the switch cabinet body is provided with a sealing hole which is connected with the cable in an inserting mode, and a sponge sealing ring which is used in cooperation with the cable is arranged in the sealing hole.

The sponge sealing ring comprises a sponge ring, and a drying agent is arranged in the sponge ring.

The plastic baffles are fixedly connected through plastic welding.

The first dehumidification bag is a lime bag.

Compared with the prior art, the invention can dehumidify the interior of the cable trench through the first dehumidifying mechanism, the first dehumidifying mechanism dries the air in the cable trench, the dried air is dry air, the dry air moves downwards after being dried, the air which is not dried is humid air, the humid air is light and moves upwards and forms circulation with the dry air in the cable trench, the first dehumidifying mechanism continuously dehumidifies the air in the cable trench, the second dehumidifying mechanism dehumidifies the electric power cabinet, the second dehumidifying mechanism dries the air in the cable cabinet, the dried air is dry air, the dried dry air moves downwards, the air which is not dried is humid air, the humid air moves upwards slightly and forms circulation with the dry air in the electric power cabinet, the second dehumidifying mechanism continuously dehumidifies the electric power cabinet, the electric power cabinet and the cable trench are kept in a dry state all the time through the first dehumidifying mechanism and the second dehumidifying mechanism, the invention has the advantages of convenient installation, wide application and easy popularization.

Drawings

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is an internal air flow diagram of the present invention.

The system comprises a switch cabinet body 1, a cable trench 2, a plastic baffle 3, a cable 4, a sponge sealing ring 5, a first dehumidification bag 6, a second dehumidification bag 7, a first dehumidification frame 8, a second dehumidification frame 9, a third dehumidification bag 10, a refrigeration pipe 11, an electrical component 12, an upper drainage plate 13 and a lower drainage plate 14, wherein A represents the descending direction of dry air, and B represents the ascending direction of wet air.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive efforts based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in the attached figures 1 to 2, the electric power cabinet for dehumidification comprises a switch cabinet body 1, a cable trench 2 for routing a cable 4 is arranged at the bottom of the switch cabinet body 1, sealed plastic baffles 3 are laid on the inner wall peripheral sides of the cable trench 2, the interior of the cable trench 2 is completely paved by the plastic baffles 3, moisture below the cable trench 2 in the ground surface is prevented from entering the cable trench 2, the plastic baffles 3 are used for blocking for the first time, the entry of the moisture is avoided, the plastic baffles 3 are sealed by plastic welding, the sealing is tight, the moisture is prevented from entering the cable trench 2, a first dehumidification bag 6 is arranged at the bottom of the cable trench 2, the first dehumidification bag is prevented from being arranged above the plastic baffles 3, namely the plastic baffles 3 surround the cable trench 2, the first dehumidification bag 6 dries the bottom of the cable trench, cold air is prevented from being generated due to temperature difference change, moisture is further accumulated, a first dehumidification mechanism is arranged at the upper end of the cable trench 2, the switch cabinet is characterized in that a second dehumidifying mechanism is arranged at the upper end inside the switch cabinet, the first dehumidifying mechanism dehumidifies the inside of the cable trench 2, the first dehumidifying mechanism dries the air in the cable trench 2, the dried air is dry air, the dry air moves downwards after being dried, the air which is not dried is humid air, the humid air is light and moves upwards and forms circulation with the dry air in the cable trench 2, the first dehumidifying mechanism continuously dehumidifies the air in the cable trench 2, the second dehumidifying mechanism dehumidifies the switch cabinet body 1, the second dehumidifying mechanism dries the air in the power cabinet, the dried air is dry air, the dried dry air moves downwards, the air which is not dried is humid air, the humid air moves upwards slightly and forms circulation with the dry air in the switch cabinet body 1, and the second dehumidifying mechanism continuously dehumidifies the switch cabinet body 1, the switch cabinet body 1 and the cable trench 2 are always kept in a dry state through the first dehumidifying mechanism and the second dehumidifying mechanism, and the switch cabinet body 1 is sealed and has good sealing performance.

An electrical component 12 connected with the cable 4 is arranged in the switch cabinet body 1, a lower drainage plate 14 is arranged at the lower end of the electrical component 12, an upper drainage plate 13 is arranged at the upper end of the electrical component 12, the included angle between the upper drainage plate 13 and the lower drainage plate 14 is 30-90 degrees, and the included angle between the lower drainage plate 14 and the horizontal plane is 100-180 degrees. Go up the air drainage of drainage plate 13 in with cubical switchboard body 1 and get off, through 14 redirecting of lower drainage plate, and then drive the moisture of electrical components 12 below, prevent that the moisture from accumulating in electrical components 12 below, electrical components 12 is prior art, specifically like current transformer, earthing switch, the arrester, isolator, high voltage circuit breaker, high voltage contactor, high voltage fuse, the transformer, the electrified display of high pressure, the insulating part, high voltage reactor, load switch, the single-phase parallel capacitor of high pressure.

First dehumidification mechanism includes the first dehumidification frame 8 that sets up along 2 width direction of cable pit, be equipped with second dehumidification bag 7 on the first dehumidification frame 8, second dehumidification bag 7 is the lime bag, and 8 both ends of first dehumidification frame are fixed connection cable pit 2, perhaps fixed connection plastic baffle 3, set up the one deck string bag on first dehumidification frame 8, pave second dehumidification bag 7 first dehumidification frame 8, perhaps directly put on first dehumidification frame 8.

The second dehumidification mechanism comprises a second dehumidification frame 9 arranged along the width direction of the switch cabinet body 1, a third dehumidification bag 10 is arranged on the second dehumidification frame 9, the third dehumidification bag 10 is a lime bag, the two ends of the second dehumidification frame 9 are fixedly connected with the switch cabinet body 1, a layer of net bag is arranged on the sub second dehumidification frame 9, and the layer of third dehumidification bag 10 is fully paved on the net bag or is directly placed on the second dehumidification frame 9.

The refrigeration pipe 11 is used for refrigerating below the second dehumidification frame 9, dry air passing through the second dehumidification frame 9 is changed into cold air, the switch cabinet body 1 is cooled, meanwhile, the cold air flows along with air in the switch cabinet body 1 in a circulating mode, the refrigeration pipe 11 is used for inputting compressed air with pressure, cold air is generated at one end (the lowest temperature can reach-20 ℃ on the premise of drying the air) through conversion of a vortex tube, hot air is generated at one end (the highest temperature can reach 87 ℃) through adjustment of the vortex tube, and the refrigeration pipe 11 can be used for adjusting the flow rate of air and the temperature of a cold air end through adjustment of a valve at the hot air end to obtain a satisfactory cold air parameter, namely an input cold air parameter and a satisfactory cold air ratio of the output cold air through adjustment of the valve at the hot air end. The refrigerating pipe 11 controls and reaches the required temperature and flow rate through a generator with replaceable inner part, and the volume percentage of the cold air quantity released by the cold air end of the refrigerating pipe 11 to the total quantity of the input compressed air is called the refrigerating coefficient of the refrigerating pipe 11. The needle valve at the hot gas discharge end of the cooling tube 11 controls the cooling coefficient, and when the cooling coefficient is in the range of 60-80%, the working efficiency of the cooling tube 11 is the maximum, and the output power (KWH) is the maximum, so that the cooling tube 11 in the working state is an ideal choice for cooling a machining process, cooling closed electric control system equipment, cooling liquid bath and cooling the body of an operator. A low refrigeration coefficient (less than 50%) reduces the air flow and produces the lowest temperature, which is often used for cooling glass, laboratory ultra-low temperature testing, and testing of electronic components.

1 lower extreme one side of cubical switchboard body is equipped with the sealed hole of being connected with cable 4 interlude, be equipped with in the sealed hole with the sponge sealing washer 5 that cable 4 cooperation was used, sponge sealing washer 5 carries out the drying to cable 4 and cubical switchboard body 1 junction and seals, prevents that external moisture from getting into in the cable pit 2.

The sponge sealing ring 5 comprises a sponge ring, a drying agent is arranged in the sponge ring, the drying agent is the prior art, can be silica gel and active alumina drying agent, the drying agent is a substance capable of removing moisture in a damp substance, and the drying agent is divided into two types: chemical desiccants, such as calcium sulfate and calcium chloride, dry by combining with water to form hydrates; physical desiccants, such as silica gel and activated alumina, dry by physically adsorbing water.

The plastic baffles 3 are fixedly connected through plastic welding, the plastic baffles 3 are spliced into the cable trench 2, the plastic welding is the prior art, and the plastic welding is a connecting method of simultaneously melting the contact surfaces of two plastic parts by a heating method so as to combine the two plastic parts into a whole. Only for thermoplastic connections. Welding may be carried out with or without a welding rod. When the welding rod is used, the end face of the end to be welded is required to be manufactured into a joint with a fixed shape (such as a U shape, an X shape and the like), the molten body of the welding rod is dripped into the joint, and the two parts to be welded are connected into a whole; when no welding rod is used, the welding surface is heated to melt, and then vertical pressure is applied to the welded surface until the welded surface is tightly fused into a whole.

The first dehumidification bag 6 is a lime bag. The lime bag is in the prior art, and the first dehumidifying bag 6, the second dehumidifying bag 7 and the third dehumidifying bag 10 are made of lime.

The working process of the invention is as follows: the bottom of the switch cabinet body 1 is provided with a cable trench 2 for routing a cable 4, the inner wall of the cable trench 2 is circumferentially provided with a sealed plastic baffle 3, the interior of the cable trench 2 is completely paved with the plastic baffle 3, moisture in the earth surface below the cable trench 2 is prevented from entering the cable trench 2, the plastic baffle 3 is prevented from entering the cable trench for the first time, the plastic baffle 3 is sealed by plastic welding, the plastic baffle 3 is tightly sealed, the moisture is prevented from entering the cable trench 2, the bottom of the cable trench 2 is provided with a first dehumidification bag 6, the first dehumidification bag is prevented from being arranged above the plastic baffle 3, namely the plastic baffle 3 is enclosed into the cable trench 2, the first dehumidification bag 6 is used for drying the bottom of the cable trench to prevent cold air from being generated due to temperature difference change and further accumulating moisture, the first dehumidification mechanism is arranged at the upper end of the cable trench 2, the second dehumidification mechanism is arranged at the upper end in the switch cabinet, the first dehumidification mechanism is used for dehumidifying the interior of the cable trench 2, the first dehumidifying mechanism dries the air in the cable trench 2, the dried air is dry air, the dry air moves downwards after being dried, the air which is not dried is wet air, the wet air is light and moves upwards, the dry air and the dry air form circulation in the cable trench 2, the first dehumidifying mechanism continuously dehumidifies the air in the cable trench 2, the second dehumidifying mechanism dehumidifies the switch cabinet body 1, the second dehumidifying mechanism dries the air in the power cabinet, the dried air is the dry air, the dried dry air moves downwards, the air which is not dried is the wet air, and the wet air moves upwards slightly, the dry air and the dry air form circulation in the switch cabinet body 1, the second dehumidification mechanism continuously dehumidifies the switch cabinet body 1, and the switch cabinet body 1 and the cable 4 groove are always kept in a dry state through the first dehumidification mechanism and the second dehumidification mechanism; an electrical component 12 connected with the cable 4 is arranged in the switch cabinet body 1, a lower drainage plate 14 is arranged at the lower end of the electrical component 12, an upper drainage plate 13 is arranged at the upper end of the electrical component 12, the included angle between the upper drainage plate 13 and the lower drainage plate 14 is 30-90 degrees, and the included angle between the lower drainage plate 14 and the horizontal plane is 100-180 degrees. Go up the air drainage of drainage plate 13 in with cubical switchboard body 1 and get off, through drainage plate 14 redirecting down, and then drive the moisture of electrical components 12 below, prevent that the moisture from accumulating in electrical components 12 below, sponge sealing washer 5 includes the sponge circle, is equipped with the drier in the sponge circle, and the drier is prior art, can be silica gel and active alumina desiccant, and the drier refers to the material that can detach moisture in the humid material, often divide into two types: chemical desiccants, such as calcium sulfate and calcium chloride, dry by combining with water to form hydrates; physical drying agents, such as silica gel and activated alumina, dry by physically adsorbing water as follows:

dehumidifying in the first pair of cable trenches 2, drying air in the cable trenches 2 by a first dehumidifying mechanism above the cable trenches 2, wherein the dried air is dry air which is heavier and can move downwards, the wet air moves upwards, the wet air and the dry air are in the first dehumidifying mechanism, meanwhile, in order to prevent serious humidity caused by rain, a first dehumidifying bag 6 is arranged on a plastic baffle plate 3, the first dehumidifying bag 6 is lime and absorbs moisture, and the plastic baffle plate 3 is formed by plastic welding to form the cable trenches 2 in a surrounding mode, so that the cable trenches 2 are thoroughly sealed, and meanwhile, moisture in the ground surface is blocked by the plastic baffle plate 3;

the interior of the electric power cabinet is dehumidified, namely the interior of the switch cabinet body 1 is dehumidified, the air above the interior of the switch cabinet body 1 is dried by a third dehumidification bag 10 in a second dehumidification mechanism above the switch cabinet body 1, the dried air is dry air, the dry air is heavier than the wet air compared with the wet air, the dry air moves downwards, the wet air moves upwards to form circulation in the switch cabinet body 1, meanwhile, a refrigeration pipe 11 is arranged below the second dehumidification mechanism to change the dry air into cold pore air, and therefore the switch cabinet body 1 is cooled;

the invention can dehumidify the interior of the cable trench 2 through the first dehumidifying mechanism, the first dehumidifying mechanism dries the air in the cable trench 2, the dried air is dry air, the dry air moves downwards after being dried, the air which is not dried is humid air, the humid air is light and moves upwards to form circulation with the dry air in the cable trench 2, the first dehumidifying mechanism continuously dehumidifies the air in the cable trench 2, the second dehumidifying mechanism dehumidifies the electric cabinet, the second dehumidifying mechanism dries the air in the electric cabinet, the dried air is dry air, the dried dry air moves downwards, the air which is not dried is humid air, the humid air moves upwards slightly and forms circulation with the dry air in the electric cabinet, the second dehumidifying mechanism continuously dehumidifies the electric cabinet, the electric cabinet and the cable trench 2 are kept in a dry state all the time through the first dehumidifying mechanism and the second dehumidifying mechanism, the invention has convenient installation, wide application and easy popularization.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. Where combinations of features are mutually inconsistent or impractical, such combinations should not be considered as being absent and not within the scope of the claimed invention. Also, it will be apparent to those of ordinary skill in the art that various changes, modifications, substitutions and alterations to the embodiments can be made without departing from the spirit of the principles of the invention.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides an electric power cabinet for dehumidification, includes the cubical switchboard body, its characterized in that: the switch cabinet is characterized in that a cable trench for cable routing is formed in the bottom of the switch cabinet body, sealed plastic baffles are laid on the periphery of the inner wall of the cable trench, a first dehumidification bag is arranged at the bottom of the cable trench, a first dehumidification mechanism is arranged at the upper end of the cable trench, and a second dehumidification mechanism is arranged at the upper end of the interior of the switch cabinet; an electrical appliance element connected with a cable is arranged in the switch cabinet body, a lower drainage plate is arranged at the lower end of the electrical appliance element, an upper drainage plate is arranged at the upper end of the electrical appliance element, the included angle between the upper drainage plate and the lower drainage plate is 30-90 degrees, and the included angle between the lower drainage plate and the horizontal plane is 100-180 degrees; the first dehumidifying mechanism comprises a first dehumidifying rack arranged along the width direction of the cable trench, a second dehumidifying bag is arranged on the first dehumidifying rack, and the second dehumidifying bag is a lime bag; the second dehumidification mechanism comprises a second dehumidification frame arranged along the width direction of the switch cabinet body, a third dehumidification bag is arranged on the second dehumidification frame, and the third dehumidification bag is a lime bag; a refrigerating pipe is arranged below the second dehumidifying rack; a sealing hole which is connected with the cable in an inserting mode is formed in one side of the lower end of the switch cabinet body, and a sponge sealing ring which is matched with the cable for use is arranged in the sealing hole; the sponge sealing ring comprises a sponge ring, and a drying agent is arranged in the sponge ring; the plastic baffles are fixedly connected through plastic welding; the first dehumidification bag is a lime bag.