Background
The large-scale power system appearing in the 20 th century is one of the most important achievements in the history of human engineering science, and a power generation and consumption system distribution box consisting of links of power generation, power transmission, power transformation, power distribution, power utilization and the like is a low-voltage distribution device formed by assembling switch equipment, a measuring instrument, a protective electrical appliance and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to the electrical wiring requirement. The circuit can be switched on or off by a manual or automatic switch in normal operation, and the circuit can be switched off or an alarm can be given by a protective appliance in fault or abnormal operation. The measuring instrument can display various parameters in operation, and can also adjust some electrical parameters to prompt or send out signals for deviation from normal working state.
Current block terminal is because need dispel the heat, make between box and the external world for incomplete sealing, and various electrical components also be the direct mount on the inner wall of box, when meetting heavy rain weather, make the rainwater get into in the box along with the heat radiation structure of box easily, lead to the box electric leakage condition to take place frequently, and behind installation earth-leakage protector and alarm in the box, the very first time of box electric leakage is with the main power supply disconnection in the box, and send out electric leakage alarm, but need a period of longer time to make the moisture evaporation in the box after intaking in the box, seriously influence the use of block terminal, long-time soaking simultaneously makes inside electrical component's life reduce by a wide margin.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides the anti-creeping alarm distribution box, which reduces the occurrence probability of the electric leakage in the rain weather and prolongs the service life of an electric element.
In order to achieve the purpose, the utility model provides the following technical scheme: an anti-creeping alarm distribution box comprises a metal outer box body, an inner box body and a box door, wherein the inner box body is positioned in the outer box body and is insulated, the box door is hinged with the outer box body, the top of the inner box body is connected with the top of the outer box body, a channel is arranged between the inner box body and the outer box body, a protective support is arranged on the outer box body, a cavity is arranged between the protective support and the outer box body, a partition board for vertically separating the cavity is arranged on the protective support to form a heat dissipation cavity and an air inlet cavity, the heat dissipation cavity and the air inlet cavity are communicated with the outside, a first through hole for communicating the air inlet cavity and the channel is arranged on the outer box body, a second through hole is arranged at the bottom of the inner box body, a heat dissipation channel is arranged between the inner box body and the partition board, the heat dissipation channel is communicated with the inner box body and the heat dissipation cavity, a heat dissipation fan is arranged in the heat dissipation channel, a plurality of electric heating rods are arranged in the inner box body, and a water-absorbing sponge is arranged in the channel, and a humidity sensor is arranged at the bottom of the inner box body.
Furthermore, a hard insulating sealing strip corresponding to the inner box body is arranged on the box door, a rubber sealing strip corresponding to the hard insulating sealing strip is arranged on the inner box body, and a groove is formed in the rubber sealing strip.
Furthermore, a leakage protector is arranged in the inner box body, an alarm device is arranged on the box door, and the leakage protector is electrically connected with the alarm device.
Furthermore, the bottom of the outer box body is provided with supporting legs.
Furthermore, an observation window is arranged on the box door.
Compared with the prior art, the utility model has the beneficial effects that: when the distribution box is normally used, external air enters the inner box body from the air inlet cavity, the first through hole, the channel and the second through hole, and the heat dissipation fan exhausts hot air to realize air circulation cooling; when the humidity in the inner box body is too high, the electric heating rod is started to heat the air in the inner box body, the rotating speed of the cooling fan is increased, the air circulation in the inner box body is accelerated, and electric leakage is prevented; when the rainwater permeates in the outer box, the water-absorbing sponge in the passage can absorb the permeated rainwater, and the electric heating rod heats the inner box body, so that the influence of the rainwater on the electric element is reduced, the occurrence probability of electric leakage is reduced, and the water in the water-absorbing sponge can be quickly evaporated by heating at the same time.
Detailed Description
In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, a definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the utility model, "a number" or "a number" means two or more unless explicitly specified otherwise.
The utility model is further illustrated with reference to fig. 1 and 2.
An anti-creeping alarm distribution box comprises a metal outer box body 1, an inner box body 2 and a box door 3, wherein the inner box body 2 is positioned in the outer box body 1 and is insulated, the box door 3 is hinged with the outer box body 1, the top of the inner box body 2 is connected with the top of the outer box body 1, a channel 4 is arranged between the inner box body 2 and the outer box body 1, a protective bracket 5 is arranged on the outer box body 1, a cavity is arranged between the protective bracket 5 and the outer box body 1, a partition plate 6 is arranged on the protective bracket 5 and divides the cavity up and down to form a heat dissipation cavity 7 and an air inlet cavity 8, the heat dissipation cavity 7 is communicated with the air inlet cavity 8 to the outside, a first through hole 9 communicated with the air inlet cavity 8 and the channel 4 is arranged on the outer box body 1, a second through hole 10 is arranged at the bottom of the inner box body 2, a heat dissipation channel 114 is arranged between the inner box body 2 and the partition plate 6, the heat dissipation channel 114 is communicated with the inner box body 2 and the heat dissipation cavity 7, a heat radiation fan 12 is arranged in the heat radiation channel 114, a plurality of electric heating rods 13 are arranged in the inner box body 2, a water absorption sponge 14 is arranged in the channel 4, and a humidity sensor 15 is arranged at the bottom of the inner box body 2.
Specifically, be provided with earth-leakage protector 18 in the interior box 2, be provided with alarm device (the attached drawing does not show) on the chamber door 3, earth-leakage protector 18 and alarm device electric connection, when the electric leakage produced on outer box 1, accessible earth-leakage protector 18 carries out the leakage alarm with the main power supply disconnection of block terminal simultaneously through alarm device.
Specifically, the bottom of the outer box 1 is provided with a supporting leg 19, so that the outer box 1 is away from the bottom surface, and the probability of rainwater infiltration is reduced
Specifically, the box door 3 is provided with an observation window 20, which is convenient for workers to observe.
As shown in fig. 1, when the distribution box is normally used, the heat dissipation fan 12 rotates, external cold air enters from the air inlet cavity 8, enters the channel 4 after passing through the first through hole 9, enters the inner box body 2 through the second through hole 10 on the inner box body 2, cools the electrical element 22 in the inner box body 2 from bottom to top, and the heat dissipation fan 12 discharges hot air into the heat dissipation cavity 7 and discharges the heat dissipation cavity 7 to the outside, so that circular heat dissipation is realized; when the humidity sensor 15 in the inner box body 2 detects that the humidity in the inner box body 2 is higher than a specified value, the electric heating rod 13 is electrified to generate heat, so that the air in the inner box body 2 is heated, meanwhile, the rotating speed of the radiating fan 12 is increased, the air circulation speed is increased, the air in the inner box body 2 is ensured to be dry, and electric leakage is prevented; and when the rainwater stretches into outer box 1 from the external world, can be earlier by the rainwater of the absorption sponge 14 absorption infiltration in the passageway 4 to avoid the rainwater to get into interior box 2, simultaneously through the internal air of heating box of electrical heating stick 13, guarantee that interior box 2 air is dry, reduced the emergence probability of electric leakage, the accessible is simultaneously heated to the absorption sponge 14 that has moisture in interior box 2 for the moisture evaporation rate of absorption sponge 14.
Specifically, dust screens can be arranged on the first through hole 9 and the second through hole 10 to reduce dust from entering the inner box 2 to the air flow.
As shown in fig. 2, specifically, a hard insulating sealing strip 16 corresponding to the inner box body 2 is arranged on the box door 3, a rubber sealing strip 17 corresponding to the hard insulating sealing strip 16 is arranged on the inner box body 2, a groove 21 is arranged on the rubber sealing strip 17, when the box door 3 is closed, the hard insulating sealing strip 16 can be inserted into the rubber groove 21, and the side wall of the rubber groove 21 can be tightly attached to the surface of the hard insulating sealing strip 16, so that the sealing effect of the box door 3 is improved.
Specifically, the opening of the rubber groove 21 is slightly smaller than the width of the hard insulating sealing strip 16, so that the rubber groove can be better attached to the surface of the hard insulating sealing strip 16.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.