CN202310425U - Ventilation-hole protection device for outdoor box - Google Patents

Abstract

The utility model discloses a ventilation hole protection device for an outdoor box body, which comprises a casing, the casing includes a bridging plate, two side plates located on both sides of the bridging plate and connected by the bridging plate, and the two side plates are closed to the rear end of the bridging plate The end plate is characterized in that the bridging plate is rectangular, the front end of the shell is fastened with a shell seat, and the shell seat is provided with a communication hole for communicating with the ventilation hole, the communication hole and the space between the shell and the shell seat The cavities together form a downward ventilation passage, and a dust-proof net for closing the communication hole is arranged on the shell seat. A shell seat is arranged between the shell of the utility model and the outer wall of the box, so that the fixing structure is firmer, and at the same time, the dust-proof net is fixed on the shell seat, which also makes the installation of the dust-proof net firmer, thereby prolonging the use of the ventilation hole protection device Long life, a cavity is formed between the shell seat and the shell, and the bridging plate is rectangular, which increases the ventilation area and achieves a good ventilation effect.

Description

Vent guards for outdoor enclosures

technical field

The utility model relates to a ventilation hole protection device for an outdoor box body, in particular to a protection device at the ventilation hole of electrical system boxes such as a control cabinet, a distribution box, and a mechanism box.

Background technique

When the electrical system box is in use, if there is no requirement for forced ventilation, ventilation holes are generally used for heat dissipation and ventilation. There will be rainwater entering the box from the ventilation holes, which will bring safety hazards to the reliable operation of the equipment in the box. Therefore, the ventilation holes are the key protection objects. The national standard stipulates that the protection level of the above-mentioned boxes must reach IP54, so the protection of the ventilation holes The protection level of the device also needs to meet the national standard of IP54.

At present, the usual method for dust prevention in the industry is to add a dust-proof net, and the usual method for waterproofing is to add a waterproof cover. The Chinese patent announcement number is CN201726049U, and the announcement date is January 26, 2011. The name is "an outdoor box" A ventilation hole protection device for an outdoor box is disclosed in the instruction manual, which includes a protection device shell for fixing on the outdoor box body and a dust-proof filter pad located inside the protection device shell. The protective device housing includes a bridging plate, two side plates located on both sides of the bridging plate and connected by the bridging plate, and a side plate located at the rear end of the bridging plate and connected to the bridging plate, the inner side of the bridging plate, the two side plates and the side plate A cavity for accommodating a dust-proof filter pad is formed, and the dust-proof filter pad is limited by a stop structure arranged at the front end of the bridging plate. But this ventilation hole protective device can not reach the national standard of IP54, and dust-proof net is all arranged on the waterproof cover in this protective device, and this structure is not firm, and ventilation effect is bad. In addition, the waterproof cover is usually fixed on the box body with waterproof glue or waterproof sealing strip. Because the waterproof cover is set outside the box body, the waterproof glue or waterproof sealing strip is directly exposed to nature, and it is very easy to age and fail or be considered damaged. Then it will cause damage to the waterproof cover and the box body.

Utility model content

The purpose of the utility model is to provide a ventilating protective device for an outdoor box to solve the problems in the prior art that the protective level of the ventilating protective device is not enough, the installation is not firm, and the ventilation effect is not good.

In order to achieve the above object, the utility model adopts the following technical scheme: the ventilation hole protection device for the outdoor box includes a casing, the casing includes a bridging plate, two side plates located on both sides of the bridging plate and connected by the bridging plate, and the two The side plate and the end plate closed at the rear end of the bridge plate, the bridge plate is rectangular, the front end of the shell is buckled with a shell seat, and the shell seat is provided with a communication hole for communicating with the ventilation hole, the communication hole and the shell and the shell seat The cavities between them jointly form a downward ventilation passage, and a dust-proof net for closing the communication holes is arranged on the shell seat.

A water retaining structure is provided at the lower part of the ventilation channel between the shell and the shell seat.

The water retaining structure includes water retaining plates suspended in a staggered manner, one end surface of two adjacent water retaining plates is respectively fixed on the side wall of the respective corresponding shell, and the other end obliquely extends downward through the center of the shell, The two sides of the water baffle respectively extend to the rear end surface of the shell seat and the inner surface of the end plate of the shell.

The rear end surface of the housing seat is provided with a supporting convex line under the water retaining plate for overlapping with the side of the water retaining plate, and the other side of the water retaining plate is fixedly arranged with the inner surface of the end plate of the shell.

An assembly boss for fixing the casing and the shell seat on the box body protrudes from the inner side of the end plate of the shell, and the shell seat is provided with an assembly through hole corresponding to the position of the assembly boss.

The front end surface of the shell base is protruded at the communication hole to be inserted into the front ring platform in the ventilation hole of the box body. A rear ring platform having a diameter equal to that of the communication hole, the inner cavity of the rear ring platform and the communication hole jointly constitute a cavity for accommodating the dust-proof net, and the dust-proof net is arranged in the cavity.

The front end surface of the shell seat is provided with a sealing groove at the outer peripheral surface of the front ring platform, and a waterproof sealing ring for sealing with the outer wall of the box is arranged in the sealing groove.

A threaded hole for installing a fan is arranged on the front end surface of the front ring platform.

A transition arc surface is provided at the joint between the bridging plate and the outer surface of the end plate.

The front end of the housing is protrudingly provided with a eaves along the outer edge surface of the housing, and the housing seat has an outer edge surface for limited fit with the inner edge surface of the eaves, and the housing seat is embedded into the eaves of the housing.

The ventilation hole protective device for outdoor box of the utility model has a shell seat between the shell and the outer wall of the box, which makes the fixing structure more firm. Strong, thereby prolonging the service life of the ventilation hole protection device, a cavity is formed between the shell seat and the shell, and the bridging plate of the utility model is rectangular, which increases the ventilation area and achieves a good ventilation effect.

Furthermore, the staggered water baffles suspended from the lower part of the casing can effectively prevent rainwater from splashing into the box from the ventilation channel without increasing the distance between the opening at the lower end of the casing and the ventilation hole.

Furthermore, the free end of the water baffle is inclined downward at an angle, which effectively prevents water from flowing backward into the ventilation channel when splashing water. Further, a protruding front ring platform is provided on the front end of the shell seat, and the front ring platform cooperates with the ventilation hole sleeve to better position and install the protective device at the ventilation hole of the box body. At the same time, the grille set in the hole of the front ring platform The grille also precisely positions the dust-proof net in the inner cavity of the communication hole and the rear ring platform.

Further, the seal provided on the front end of the shell seat does not need to be coated with sealant around the shell in the prior art to prevent rainwater from entering the box from the connection gap. service life.

Description of drawings

Fig. 1 is the front view of the shell seat in the utility model embodiment 1;

Fig. 2 is the back view of Fig. 1;

Fig. 3 is the AA sectional view of Fig. 2;

Fig. 4 is the front view of the housing in Embodiment 1 of the present utility model;

Fig. 5 is a BB sectional view of Fig. 4;

Fig. 6 is a schematic diagram of the assembly and use structure of Embodiment 1 of the utility model;

Fig. 7 is a front view of the housing seat in Embodiment 2 of the present utility model;

Fig. 8 is a CC sectional view of Fig. 7;

Fig. 9 is a front view of the housing in Embodiment 2 of the present utility model;

Fig. 10 is a DD sectional view of Fig. 9;

Fig. 11 is a schematic diagram of the assembly and use structure of Embodiment 2 of the utility model;

Fig. 12 is a perspective view of Embodiment 2 of the present utility model.

Detailed ways

Example 1 of the ventilation hole protection device for outdoor boxes, as shown in Figures 1-6, the housing 2 in this embodiment, as shown in Figures 4-5, is a one-time molding structure, which includes a rectangular bridging plate at the top 24, the two side plates 25 located on both sides of the bridging plate and connected by the bridging plate, and the end plate 26 that closes the rear ends of the two side plates and the bridging plate, and a transition arc is provided at the connection between the bridging plate 24 and the end plate, and the shell 2 The front end of the housing is protruded with eaves 27 along the outer edge surface of the shell, and the inner surface of the end plate 26 of the shell is protruded with four assembly bosses 21, and the assembly bosses 21 are all provided with threaded blind holes 23. The shell in this embodiment As shown in Figures 1-3, the housing base 1 has an outer edge surface that matches the shape of the inner edge surface of the eaves 27 of the housing 2, and the upper half of the housing base 1 corresponds to the threaded blind hole 23 on the assembly boss 21. The position is provided with an assembly through hole 15, the shell base 1 is provided with a communication hole 14 for communicating with the ventilation hole of the box, and the front end of the shell base 1 is protruded from the front end of the communication hole 14 for inserting into the ventilation hole of the box. Platform 18, the front end of the inner hole of the front ring platform is fixed with a grid plate 12, the front end surface of the front ring platform 18 is provided with a threaded hole 17 for installing the fan, and the rear end surface of the shell seat is protrudingly provided with the inner diameter and the connecting hole 14. The rear ring platform 16 with the same communication hole diameter, the front end surface of the shell seat 1 is provided with a sealing groove 11 at the outer peripheral surface of the front ring platform 18. When the present embodiment 1 is in use, as shown in Figure 6, the rear ring platform 16 and the The inner cavity of the communication hole 14 is welded (or threaded) with a dust-proof net 3, and the shell base 1 is buckled in the eaves 27 at the front end of the shell 2. The communication hole 14 and the cavity between the shell base 1 and the shell 2 together constitute a Downward ventilation channel, waterproof sealing ring 5 is embedded in the sealing groove 11 on the shell base 1, the front ring platform 18 on the shell base 1 is inserted into the ventilation hole of the box body, and the bolt 4 passes through the box body from the inner wall of the box body The assembly through hole 15 on the shell base 1 is screwed into the threaded blind hole 23 on the assembly boss 21 of the shell, and the shell base 1 and the shell are connected at the ventilation hole of the box body, between the screw 4 and the inner wall of the box A retaining spring washer 6 is provided.

Embodiment 2 of the ventilation hole protection device for outdoor box, as shown in Figure 7-12, the difference between Embodiment 2 of the present utility model and Embodiment 1 is that Embodiment 2 is based on the shell and shell base in Embodiment 1 On the basis of the structure, a water retaining structure is provided between the shell 2 and the shell seat 1 at the lower part of the ventilation passage, and the water retaining structure includes, as shown in Figures 9-10, three water retaining plates 22 arranged in a staggered manner, One end face of each of the two adjacent water baffles is respectively fixed on the side wall of the corresponding shell, and the other end extends obliquely downward through the center of the shell, as shown in Figure 7-8, the shell base 1 is on the corresponding shell 2. The lower part of the position of the water retaining plate 22 is staggered with supporting ribs 13 for matching with the lower edge surface of the water retaining plate 22. One side of the water retaining plate is fixedly arranged on the inner surface of the end plate, and the other side overlaps the inner surface of the end plate. Connected to the supporting convex strip 13 , when the present embodiment is assembled and used, as shown in FIG. 11 , the water shield 22 of the shell 2 is overlapped on the supporting convex strip 13 on the housing base 1 .

In other embodiments, during assembly and use, the shell seat may not be embedded with a waterproof sealing ring, and a waterproof sealant may be applied around the contact surface between the shell seat and the box body to achieve a sealing effect.

In other embodiments, the water-retaining structure can also be two rows of cylinders arranged staggered between the housing seat and the outer shell. Those skilled in the art can carry out the water-retaining structure on the basis of this idea and technical solution. Immaterial improvements all fall within the protection scope of the present utility model.

In Embodiment 2, the number of water baffles is three, and those skilled in the art can also set it to two or four, but all of them fall within the protection scope of the present utility model.

In other embodiments, ventilation may also be performed directly through the communication holes, without a fan.

In other embodiments, the shell and the shell base can also be directly welded on the outer wall of the box.

Claims (10)

1. Ventilation hole protection device for outdoor cabinets, including a casing, the casing includes a bridge plate, two side plates located on both sides of the bridge plate and connected by the bridge plate, and an end plate closing the two side plates and the rear end of the bridge plate , characterized in that the bridging plate is rectangular, the front end of the housing is fastened with a housing base, and the housing base is provided with a communication hole for communicating with the ventilation hole, and the communication hole and the cavity between the housing and the housing base jointly constitute A downward ventilation channel is provided, and a dust-proof net for closing the communication hole is arranged on the shell seat. 2. The ventilation hole protection device for an outdoor box according to claim 1, wherein a water-retaining structure is provided at the lower part of the ventilation channel between the shell and the shell seat. 3. The ventilation hole protective device for outdoor boxes according to claim 2, wherein the water retaining structure comprises water retaining plates suspended in a staggered manner, and the respective end surfaces of two adjacent water retaining plates are fixed respectively. They are arranged on the side walls of the respective corresponding shells, and the other end obliquely extends downward through the center of the shell. 4. The ventilation hole protection device for an outdoor box according to claim 3, characterized in that, the rear end surface of the shell base is provided with a support for lapping and matching with the side of the water baffle on the bottom of the water baffle. The convex strip, the other side of the water baffle is fixedly arranged with the inner surface of the end plate of the casing. 5. The ventilation hole protection device for an outdoor box according to claim 1, wherein an assembly boss for fixing the shell and the shell seat on the box body is protruded on the inner side of the end plate of the shell, and the shell seat An assembly through hole is provided corresponding to the position of the assembly boss. 6. The ventilation hole protection device for an outdoor box according to claim 1, characterized in that, the front end surface of the shell seat is provided with a front ring platform for inserting into the ventilation hole of the box body at the communication hole, and the front ring The front end of the inner hole of the table is provided with a grid plate, and the rear end surface of the shell seat is protruded from the communication hole with a rear ring platform with an inner diameter equal to the diameter of the communication hole. The inner cavity of the rear ring platform and the communication hole together constitute a dustproof net. The cavity, and the dust-proof net is arranged in the cavity. 7. The ventilation hole protection device for an outdoor box according to claim 6, characterized in that, the front end surface of the shell seat is provided with a sealing groove at the outer peripheral surface of the front ring platform, and the sealing groove is provided with a sealing groove for connecting with the outer wall of the box. Airtight waterproof seal. 8 . The ventilation hole protection device for an outdoor box according to claim 6 , wherein a threaded hole for installing a fan is provided on the front end surface of the front ring platform. 8 . 9 . The ventilation hole protection device for outdoor boxes according to claim 1 , wherein a transition arc surface is provided at the joint between the bridging plate and the outer surface of the end plate. 10 . 10. The ventilation hole protection device for an outdoor box according to claim 1, wherein the front end of the casing is protruded with a eaves along the outer edge of the casing, and the shell seat has an inner surface limit for connecting with the eaves. The outer edge surface of the bit fits, and the shell seat is embedded and buckled in the eaves of the shell.

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