CN220099976U - Cable trench moisture removal and prevention device - Google Patents

Abstract

The utility model relates to a cable trench moisture removal and prevention device which is arranged on a cable trench cover plate. The moisture removal and prevention device comprises a moisture prevention shell, and a vent hole penetrating through the thickness of the cable trench cover plate is formed in the cable trench cover plate, wherein: the dampproof shell is connected to the cable pit cover plate, is of a cavity structure with one end open, is provided with a vent hole in a covering mode, is provided with a first cavity communicated with the vent hole, and is also provided with at least one vent hole penetrating through the wall thickness of the dampproof shell, and the vent hole is communicated with the first cavity and outside air. Through the arrangement, moisture and humidity in the cable duct enter the first cavity through the vent hole and are discharged through the vent hole, so that the air pressure in the cable duct is successfully balanced, and the moist hot air flow in the cable duct is prevented from accumulating.

Description

Cable trench moisture removal and prevention device

Technical Field

The utility model relates to the technical field of cable trench moisture prevention, in particular to a cable trench moisture removal and prevention device.

Background

The cable is used as a product for telecommunication or power transmission, is laid in a cable trench and is connected with secondary equipment boxes such as operation boxes, distribution rooms, control cabinets and the like of a plurality of electric equipment.

However, the cable pit is a place which is easy to leak rain, wet, accumulate water and be sealed all around, and hot steam is easy to form in the cable pit under the action of high temperature. Therefore, when the cable trench is communicated with the secondary equipment box body through the cable, hot steam can enter the secondary equipment through a gap between the cable and the cable, so that the conditions of insulation reduction, short circuit, rust circuit open circuit and the like of the secondary equipment are easily caused, the aging of the secondary equipment can be accelerated, the damage of the secondary equipment is caused, and the safe and stable operation of the equipment is seriously influenced. And the hot steam in the cable pit is easy to be attached to the surface of the cable, so that the aging of the cable insulation layer is accelerated, and the short circuit is caused under the condition that the cable is slightly damaged.

At present, in order to avoid damage caused by hot steam in secondary equipment, primary equipment such as a dehumidifier, a heater, a dehumidifier and the like is arranged in each secondary equipment such as a control cabinet, an operation box, a distribution room and the like. However, the primary device has a very low effect, and the hot steam entering the secondary device firstly breaks down the primary device, so that the related effect is lost.

Disclosure of Invention

Based on the above, it is necessary to provide a moisture removal and prevention device for a cable trench, which aims at solving the problem that the secondary equipment fails and cannot be effectively improved due to moisture and water accumulation in the cable trench at present.

The utility model provides a cable pit damp proof apparatus that dehumidifies, installs in cable pit apron, its characterized in that, damp proof apparatus includes dampproofing shell, set up the ventilation hole that runs through its thickness on the cable pit apron, wherein:

the moistureproof shell is connected to the cable duct cover plate, and is of a cavity structure with one end open, the open end of the moistureproof shell is covered on the vent hole, the moistureproof shell is provided with a first cavity communicated with the vent hole, the moistureproof shell is also provided with at least one vent penetrating through the wall thickness of the moistureproof shell, and the vent is communicated with the first cavity and external air.

In one embodiment, the number of the ventilation openings is two, and the two ventilation openings are opposite to each other.

In one embodiment, the moisture removal and protection device further comprises a water-resistant inner shell, wherein:

the waterproof inner shell is arranged in the first cavity, the circumferential outer wall of the bottom side of the waterproof inner shell is in sealing connection with the circumferential inner wall of the dampproof outer shell, the circumferential outer wall of the other side of the waterproof inner shell is provided with a waterproof space with the circumferential inner wall of the dampproof outer shell, the highest point of the waterproof inner shell is away from the top side inner wall of the dampproof outer shell, a first gap is formed between the waterproof inner shell and the dampproof outer shell, the waterproof inner shell is of a cavity structure with two open ends, and the waterproof inner shell is provided with a second cavity covered on the ventilation hole.

In one embodiment, the side wall of the moisture-proof shell is provided with a drain hole penetrating through the wall thickness of the moisture-proof shell, and the drain hole is communicated with the water-proof space.

In one embodiment, the inner water-proof shell comprises a hollow connecting part and a hollow diversion part, the connecting part is of a structure with a wide bottom and a narrow top, the circumferential outer wall of the lower side of the connecting part is in sealing connection with the circumferential inner wall of the moisture-proof shell, and the upper side of the connecting part is communicated with the diversion part.

In one embodiment, the moisture removal and prevention device comprises an air guide assembly, wherein the air guide assembly is installed at the ventilation opening and is used for controlling the exchange rate of air in the cable pit and outside air.

In one embodiment, the moisture resistant housing is removably connected to the cable trough cover.

In one embodiment, the moisture-proof housing comprises a moisture-proof housing body and an extension plate, the moisture-proof housing body is provided with the first cavity, the extension plate is circumferentially arranged around the outer wall of the moisture-proof housing body, a first installation through hole penetrating through the thickness of the extension plate is formed in the extension plate, a second installation through hole penetrating through the thickness of the cable duct cover plate is formed in the cable duct cover plate, and an installation fastener penetrates through the first installation through hole and the second installation through hole to detachably connect the extension plate and the cable duct cover plate into a whole.

In one embodiment, the moisture resistant housing is sealingly connected to the cable gland.

In one embodiment, a sealing strip is arranged at the bottom wall of the moistureproof box and/or the bottom end of the extension plate.

Above-mentioned cable pit moisture removal dampproof device, through the ventilation hole that sets up the first cavity intercommunication cable pit apron of dampproofing shell, the inside moisture of cable pit of being convenient for, moisture get into first cavity through the ventilation hole, and dampproofing shell has seted up the vent of intercommunication first cavity and external gas, is convenient for with getting into the moisture in the first cavity, moisture exhaust. Through the arrangement, the air pressure in the cable trench is successfully balanced, so that moist heat steam in the cable trench is prevented from accumulating, and on one hand, the heat steam is prevented from entering secondary equipment through gaps between cables, thereby preventing the conditions of reduced insulativity, short circuit, rust circuit open circuit, aging and damage of the secondary equipment and the like caused by the action of the heat steam on the secondary equipment; on the other hand, the adhesion of the hot steam on the surface of the cable is avoided, so that the aging phenomenon of the cable insulating layer caused by the action of the hot steam is prevented, and the short circuit phenomenon caused by the hot steam under the condition that the cable is slightly damaged is also avoided; and meanwhile, the normal operation of the primary equipment is ensured.

Drawings

Fig. 1 is a schematic structural view of a cable pit moisture removing and preventing device provided by the utility model.

Fig. 2 is a cross-sectional view of the cable pit moisture removal and prevention device provided by the utility model.

Wherein:

10. a cable pit moisture removing and preventing device;

100. a moisture resistant enclosure; 110. a moisture proof box; 111. a first cavity; 1111. a water-blocking space; 1112. a first gap; 112. a drain hole; 120. an extension plate; 121. a first mounting through hole;

200. a water-proof inner shell; 210. a second cavity; 220. a connection part; 221. a sloping plate; 230. a flow guiding part; 231. a deflector;

300. and the air guide assembly.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a moisture-removing and moisture-preventing device 10 for a cable pit in an embodiment of the present utility model, the moisture-removing and moisture-preventing device 10 for a cable pit is installed on a cable pit cover, the moisture-removing and moisture-preventing device 10 for a cable pit includes a moisture-preventing housing 100, a vent hole penetrating through the thickness of the cable pit cover is formed on the cable pit cover, and it should be noted that the vent hole on the cable pit cover is communicated with an inner cavity of the cable pit, wherein:

the dampproof shell 100 is connected to the cable pit cover plate, the dampproof shell 100 is of a cavity structure with one end being open, the open end of the dampproof shell 100 is covered by the vent hole, the dampproof shell 100 is provided with a first cavity 111 communicated with the vent hole, the dampproof shell 100 is further provided with at least one vent penetrating through the wall thickness of the vent hole, and the vent hole is communicated with the first cavity 111 and external air. In a specific arrangement, the moisture-proof housing 100 is generally formed of stainless steel, but the moisture-proof housing 100 is not limited to stainless steel, and may be made of other corrosion-resistant materials. Through the arrangement, moisture and humidity in the cable duct enter the first cavity 111 through the vent holes and are discharged through the vent holes, so that the air pressure in the cable duct is successfully balanced, and the moist hot air flow in the cable duct is prevented from accumulating. It will be appreciated that the cable duct moisture removal and prevention device 10 of the present utility model can be applied to cable ducts, cable wells and other equipment wells, and has good moisture removal and prevention effects.

Above-mentioned cable pit moisture removal dampproof device 10, through the ventilation hole that sets up the first cavity 111 intercommunication cable pit apron of dampproofing shell 100, the inside moisture of cable pit, moisture are convenient for get into first cavity 111 through the ventilation hole, and dampproofing shell 100 has seted up the vent of intercommunication first cavity 111 and external gas, is convenient for discharge moisture, the moisture that get into in the first cavity 111. Through the arrangement, the air pressure in the cable trench is successfully balanced, so that moist heat steam in the cable trench is prevented from accumulating, and on one hand, the heat steam is prevented from entering secondary equipment through gaps between cables, thereby preventing the conditions of reduced insulativity, short circuit, rust circuit open circuit, aging and damage of the secondary equipment and the like caused by the action of the heat steam on the secondary equipment; on the other hand, the adhesion of the hot steam on the surface of the cable is avoided, so that the aging phenomenon of the cable insulating layer caused by the action of the hot steam is prevented, and the short circuit phenomenon caused by the hot steam under the condition that the cable is slightly damaged is also avoided; and meanwhile, the normal operation of the primary equipment is ensured.

As can be understood, when the metal equipment is arranged in the cable pit, the corrosion of the metal equipment can be accelerated by the hot steam formed in the cable pit, and the moisture and the humidity in the cable pit are discharged from the ventilation opening after entering the first cavity 111 through the ventilation hole by the cable pit moisture-discharging and preventing the metal equipment from being corroded by the hot steam.

Referring to fig. 2, fig. 2 shows a cross-sectional view of a cable pit moisture removal and prevention device 10 according to an embodiment of the present utility model, in some embodiments, in order to better avoid external air flow from blowing directly into the cable pit, a preferred embodiment has two ventilation openings, and the two ventilation openings are disposed opposite to each other. When the moisture-proof shell is specifically arranged, ventilation openings are formed in two opposite side walls of the moisture-proof shell 100. Through above-mentioned setting, outside air is convected from two vents, when making the inside and outside temperature balance of cable pit, can make the interior atmospheric pressure balance of damp-proofing device of dehumidification, avoid forming the negative pressure to avoid blowing outside air into the cable pit in. The purpose of balancing the air flow inside and outside the cable trench can be achieved, and the air direction is prevented from being blown into the cable trench.

It should be noted that, when encountering weathers, external dust and rainwater easily enter the first cavity 111 through the vent and then flow into the cable pit, in order to avoid the rainwater and dust from entering the cable pit, a preferred embodiment, the moisture removal and prevention device further includes a water-proof inner case 200, wherein:

the inner water-proof shell 200 is disposed in the first cavity 111, the peripheral outer wall at the bottom side of the inner water-proof shell 200 is in sealing connection with the peripheral inner wall of the moisture-proof shell 100, the peripheral outer wall at the other side of the inner water-proof shell 200 and the peripheral inner wall of the moisture-proof shell 100 have a water-proof space 1111, the highest point of the inner water-proof shell 200 is separated from the top side inner wall of the moisture-proof shell 100 by a first gap 1112, and the inner water-proof shell 200 is of a cavity structure with two open ends, and the inner water-proof shell 200 is provided with a second cavity 210 covered by a vent hole. As will be appreciated, the first cavity 111 includes a waterproof space 1111 and a first space. When specifically set up, the diapire of water proof inner shell 200 and the diapire of dampproofing shell 100 are located same horizontal plane, and water proof inner shell 200 adopts stainless steel material to form generally, but water proof inner shell 200 is not limited to stainless steel material, and other corrosion-resistant materials can all, and water proof inner shell 200 is connected with dampproofing shell 100 through welding or crimping's form.

By the arrangement, rainwater and dust entering the moistureproof outer shell 100 from the vent are blocked by the waterproof inner shell 200, and enter the waterproof space 1111 between the moistureproof outer shell 100 and the waterproof inner shell 200, so that the rainwater and the dust are effectively prevented from entering the cable pit; simultaneously, the moist air in the cable duct enters the second cavity 210 from the vent hole and then enters the first gap 1112, and then flows from the first gap 1112 to the vent hole and is discharged, namely, the hot steam in the cable duct forms a circulation and chimney effect on the outer part of the water-proof inner shell 200 through the flow of natural air entering from the vent holes at the two sides, so that the hot steam is driven to be rapidly discharged from the vent holes. To facilitate the barrier of the inner water-blocking skin 200 against rain and dust, the height of the inner water-blocking skin 200 is preferably two-thirds of the height of the moisture-proof skin 100, and the height of the inner water-blocking skin 200 is generally no lower than the lowest point of the vent.

In order to drain rainwater and dust in the waterproof space 1111 more conveniently, specifically, the side wall of the moisture-proof housing 100 is provided with a drain hole 112 penetrating the wall thickness thereof, and the drain hole 112 communicates with the waterproof space 1111. When specifically arranged, the drain hole 112 is arranged at the bottom of the side wall of the moisture-proof shell 100, and the drain hole 112 is positioned at the lower side of the ventilation opening. With the above arrangement, on the one hand, the sewage and the foreign matter in the waterproof space 1111 are discharged through the drain hole 112, and on the other hand, when the rain weather is too large, the sewage flowing into the waterproof space 1111 from the drain hole 112 can also be discharged from the vent. An extension pipe may be installed at the drain hole 112 in order to drain sewage and foreign substances to a designated place. As will be appreciated, during the evacuation of hot steam within the cable trench, water droplets that may form between the moisture barrier outer shell 100 and the water barrier inner shell 200 also exit through the drain holes 112.

In order to form the waterproof space 1111 more conveniently, the waterproof inner case 200 includes a hollow connection part 220 and a hollow guide part 230, the connection part 220 has a structure with a wide lower part and a narrow upper part, the circumferential outer wall of the lower side of the connection part 220 is connected with the circumferential inner wall of the moisture-proof outer case 100 in a sealing manner, and the upper side of the connection part 220 is communicated with the guide part 230. When the connecting part 220 is specifically arranged, the connecting part 220 can be a hollow trapezoid body or a hollow truncated cone-shaped structure, and the flow guiding part 230 can be a hollow square body or a hollow cylindrical structure; in the present utility model, the connecting portion 220 is preferably a hollow trapezoid, and the flow guiding portion 230 is preferably a hollow square; the connecting portion 220 includes four inclined plates 221, the four inclined plates 221 enclose a hollow trapezoid structure, and an inclination angle between the bottom end of the inclined plate 221 and a horizontal plane is generally 45 degrees; the flow guiding part 230 comprises four flow guiding plates 231, and the four flow guiding plates 231 enclose a hollow square structure; the bottom wall or the lower circumferential outer wall of the swash plate 221 is hermetically connected to the circumferential inner wall of the bottom side of the moisture proof housing 100, the top wall of the swash plate 221 is connected to the bottom wall of the deflector 231, and the swash plate 221 and the deflector 231 are usually welded.

In order to adjust the wind force of the external air flow blowing into the moisture removing and preventing device, a preferred embodiment of the moisture removing and preventing device comprises an air guide assembly 300, wherein the air guide assembly 300 is arranged at a vent, and the air guide assembly 300 is used for controlling the exchange rate of the air in the cable trench and the external air. When specifically setting up, air guide assembly 300 can be the shutter, and the material of shutter prefers aluminum alloy, and the shutter has access hole and can unpick and wash the filter screen, and the shutter can be fixed with dampproofing shell 100 through fastener such as rivet, bolt, and the size of opening of blade can adjust the wind-force size that external air current blown into damp-proof device in the shutter. With the above arrangement, when the louver blades are opened, the hot steam in the cable trench forms a circulation and chimney effect outside the inner water-blocking casing 200 by the flow of natural air entering from the louver on both sides, thereby driving the hot steam to be rapidly discharged from the louver.

To facilitate replacement of the damaged cable duct moisture removal and protection device 10, a preferred embodiment provides for the moisture protection housing 100 to be removably attached to the cable duct cover. With the above arrangement, the cable pit moisture removal and prevention device 10 can be easily replaced when it is aged or damaged during use.

In order to conveniently realize detachable connection of the moisture-proof housing 100 and the cable duct cover, specifically, the moisture-proof housing 100 comprises a moisture-proof box 110 and an extension plate 120, the moisture-proof box 110 is provided with a first cavity 111, the extension plate 120 is circumferentially arranged around the outer wall of the moisture-proof box 110, the extension plate 120 is provided with a first installation through hole 121 penetrating through the thickness of the extension plate, the cable duct cover is provided with a second installation through hole penetrating through the thickness of the cable duct cover, and an installation fastener penetrates through the first installation through hole 121 and the second installation through hole to detachably connect the extension plate 120 and the cable duct cover into a whole. When the moisture-proof box body 110 is specifically arranged, the vent is formed in the moisture-proof box body 110, the moisture-proof box body 110 can be of a square structure, but the moisture-proof box body 110 is not limited to the square structure and can be of geometric structures of other shapes such as a circular structure, a conical structure and the like; the number of the first mounting through holes 121 may be 2, 5, 9 or more, and the plurality of first mounting through holes 121 are spaced apart along the extension plate 120; when the moisture proof case 110 has a square structure, one drain hole 112 is formed in each of four sidewalls of the moisture proof case 110.

In order to prevent external water from flowing into the cable trench through the junction of the moisture proof housing 100 and the cable trench cover, more specifically, the moisture proof housing 100 is hermetically connected to the cable trench cover. When specifically provided, the extension plate 120 is sealingly connected to the cable gland plate.

In order to conveniently realize the sealing connection between the moisture-proof housing 100 and the cable pit cover, further, a sealing strip is arranged at the bottom wall of the moisture-proof box 110 and/or the bottom end of the extension plate 120. In particular arrangements, in addition to sealing using a sealing strip, a sealant may be applied between the moisture resistant housing 110 and the cable trench cover and/or between the extension panel 120 and the cable trench cover.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The utility model provides a cable pit damp proof apparatus that dehumidifies, installs in cable pit apron, its characterized in that, damp proof apparatus includes dampproofing shell, set up the ventilation hole that runs through its thickness on the cable pit apron, wherein:

the moistureproof shell is connected to the cable duct cover plate, and is of a cavity structure with one end open, the open end of the moistureproof shell is covered on the vent hole, the moistureproof shell is provided with a first cavity communicated with the vent hole, the moistureproof shell is also provided with at least one vent penetrating through the wall thickness of the moistureproof shell, and the vent is communicated with the first cavity and external air.

2. The cable pit moisture removal and prevention device as set forth in claim 1, wherein the number of said ventilation openings is two, and two of said ventilation openings are disposed opposite each other.

3. The cable pit moisture removal and protection device of claim 1, further comprising a moisture resistant inner housing, wherein:

the waterproof inner shell is arranged in the first cavity, the circumferential outer wall of the bottom side of the waterproof inner shell is in sealing connection with the circumferential inner wall of the dampproof outer shell, the circumferential outer wall of the other side of the waterproof inner shell is provided with a waterproof space with the circumferential inner wall of the dampproof outer shell, the highest point of the waterproof inner shell is away from the top side inner wall of the dampproof outer shell, a first gap is formed between the waterproof inner shell and the dampproof outer shell, the waterproof inner shell is of a cavity structure with two open ends, and the waterproof inner shell is provided with a second cavity covered on the ventilation hole.

4. A cable pit moisture removal and prevention device as claimed in claim 3 wherein the side wall of the moisture prevention housing is provided with a drain hole extending through the wall thickness thereof, said drain hole communicating with the water barrier space.

5. A cable pit moisture removal and prevention device as claimed in claim 3 wherein said inner water-resistant housing comprises a hollow connecting portion and a hollow guide portion, said connecting portion is of a lower wide upper narrow configuration, a peripheral outer wall of a lower side of said connecting portion is in sealing connection with a peripheral inner wall of said moisture-resistant housing, and an upper side of said connecting portion is in communication with said guide portion.

6. The moisture removal and prevention device for a cable trench of claim 1, wherein the moisture removal and prevention device comprises an air guide assembly mounted to the vent, the air guide assembly being configured to control the rate of exchange of air within the cable trench with ambient air.

7. The cable trench moisture removal and protection device of claim 1, wherein the moisture resistant housing is removably connected to the cable trench cover.

8. The moisture removal and prevention device for a cable trench of claim 7, wherein the moisture removal and prevention device comprises a moisture removal housing and an extension plate, the moisture removal housing having the first cavity, the extension plate being circumferentially disposed about an outer wall of the moisture removal housing, the extension plate having a first mounting through hole extending through a thickness thereof, the cable trench cover having a second mounting through hole extending through a thickness thereof, and a mounting fastener removably connecting the extension plate to the cable trench cover as one body through the first and second mounting through holes.

9. The cable trench moisture removal and protection device of claim 8, wherein the moisture resistant housing is sealingly connected to the cable trench cover.

10. The cable pit moisture removal and prevention device as set forth in claim 9 wherein a sealing strip is provided at the bottom wall of the moisture prevention box and/or at the bottom end of the extension plate.