CN216794427U

CN216794427U - Cubical switchboard ventilation unit with waterproof function

Info

Publication number: CN216794427U
Application number: CN202123453907.8U
Authority: CN
Inventors: 马健; 龚进; 胡建刚
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-21
Anticipated expiration: 2031-12-31

Abstract

A switch cabinet ventilation device with a waterproof function belongs to the technical field of auxiliary components of low-voltage apparatuses. Including a ventilation mechanism, this ventilation mechanism includes all around the fretwork and the bottom forms an open ventilation frame and a top cap, and the ventilation frame sets up the top at the cubical switchboard under the user state, and by uncovered and the cabinet chamber of cubical switchboard communicate with each other, and the top cap is joined in marriage with the upper portion lid of ventilation frame and is uncovered the closure with the upper portion of ventilation frame, is provided with the louvre on the lateral wall of ventilation frame, this louvre make by the ventilation frame chamber that the ventilation frame that the lateral wall encloses to close formed communicates with each other with the external world, still including one be used for preventing that the comdenstion water trickles to drip to preventing of the cabinet intracavity of cubical switchboard return water manger plate frame, should prevent returning water manger plate frame with inlay under the state that the inner wall of lateral wall combines closely and put on the lower edge of louvre. The technical effects are as follows: because the anti-return water retaining frame used for preventing condensed water from dripping into the frame cavity of the switch cabinet is additionally arranged in the ventilation frame and on the lower edge of the heat dissipation hole, water drops generated by condensation can be prevented from returning into the cabinet from the outside to the inside through the heat dissipation hole, the protection of electrical components in the cabinet is very facilitated, the risk of burning of a circuit short circuit and a tripping test in the cabinet is avoided, and the safety and the reliability of the switch cabinet in the service process are guaranteed.

Description

Cubical switchboard ventilation unit with waterproof function

Technical Field

The utility model belongs to the technical field of auxiliary components of low-voltage electrical appliances, and particularly relates to a switch cabinet ventilation device with a waterproof function.

Background

The low-voltage switchgear assembly is a widely used electrical device, and is an important component of an electrical power system, but due to differences in use environments, the requirements for dust prevention and water prevention are different. Because the low-voltage switch cabinet can generate a large amount of heat in the operation process, the temperature in the cabinet is obviously higher than the temperature outside the cabinet. The high temperature in the cabinet may cause the current carrying capacity of the current carrying components disposed therein to decrease, thereby reducing the cabinet's useful life and operational reliability, which is highly detrimental to electrical safety. As known in the art, hot air emitted from the cabinet usually gathers toward the top of the cabinet, so the heat dissipation effect at the top of the cabinet, or the strength of the heat dissipation capability, has an inseparable causal relationship with the temperature rise of the cabinet. Particularly, in relatively special environments such as the underground, the vicinity of condensation lines, and high-temperature hot air discharged from the cabinet inevitably cause a dripping situation due to dew condensation, if the aforementioned water enters the cabinet, there is a fear that lines are short-circuited, a trip test is burned out, and the like. In view of the foregoing, it is of positive significance to search for a design that provides a waterproof function for a switchgear.

In the published chinese patent literature, technical information related to a switch cabinet ventilation device with waterproof function can be seen, such as "a switch cabinet dustproof ventilation waterproof device" recommended by CN205429451U, which uses a dry box for waterproof; further, CN109066339A provides a switch cabinet with heat dissipation and waterproof functions, and CN210779624U introduces a switch cabinet with waterproof function, which is designed for natural precipitation of weather because of being applied purely outdoors, and thus has no instructive meaning for the aforementioned dew prevention of high-temperature heat applied indoors.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a switch cabinet ventilation device with a waterproof function, which is beneficial to preventing water generated by condensation of high-temperature air from the inside of a cabinet on the top of the cabinet from dripping into the cabinet so as to avoid the situations of damage to electric components in the cabinet, short circuit of a circuit, burning of a trip test and the like and is beneficial to ensuring safety and reliability.

The utility model aims to solve the problem that the waterproof switch cabinet ventilation device comprises a ventilation mechanism, wherein the ventilation mechanism comprises a ventilation frame and a top cover, the periphery of the ventilation frame is hollowed, an opening is formed in the bottom of the ventilation frame, the ventilation frame is arranged at the top of a switch cabinet in a use state and is communicated with a cabinet cavity of the switch cabinet through the opening, the top cover is matched with the upper portion of the ventilation frame in a covering mode and seals the opening in the upper portion of the ventilation frame, heat dissipation holes are formed in the side wall of the ventilation frame and enable the ventilation frame cavity of the ventilation frame formed by enclosing of the side wall to be communicated with the outside, the waterproof switch cabinet ventilation device further comprises a water return prevention and retaining frame for preventing condensed water from dripping into the cabinet cavity of the switch cabinet, and the water return prevention and retaining frame is embedded on the lower edge of the heat dissipation holes in a close combination state with the inner wall of the side wall.

In a specific embodiment of the utility model, the ventilation frame is formed by jointly enclosing a front side wall, a rear side wall, a left side wall, a right side wall and a rectangular shape which is penetrated up and down.

In another specific embodiment of the present invention, the heat dissipation holes are disposed in the middle region of the sidewall in the height direction and are arranged at intervals.

In another specific embodiment of the present invention, the heat dissipation holes opened on the side wall are rectangular holes arranged at intervals in the longitudinal direction.

In another embodiment of the present invention, the water returning prevention and retaining frame includes a positioning portion of the drainage frame, the positioning portion of the drainage frame is closely combined with the inner wall of the sidewall in a gapless state, and the positioning portion of the drainage frame is flush with the lower edge of the heat dissipation hole formed on the sidewall.

In another specific embodiment of the present invention, the water backflow preventing and retaining frame further includes a water drainage frame retaining edge for preventing water at the lower edge of the heat dissipation hole from flowing back into the cavity of the ventilation frame, and the water drainage frame retaining edge is formed by bending an upper edge of the positioning portion of the water drainage frame in the height direction.

In a more specific embodiment of the present invention, an included angle of less than 45 ° is formed between the water retaining edge of the water discharge frame and the side wall.

In yet another specific embodiment of the utility model, said angle smaller than 45 ° is 15 °.

In a still more specific embodiment of the present invention, the cross-sectional shape of the water returning prevention and retaining frame is a zigzag shape, an arc shape or a scale hook shape, and when the cross-sectional shape is a zigzag shape, a transition portion is formed between the positioning portion of the drain frame and the water retaining edge of the drain frame.

In yet another specific embodiment of the present invention, a top cover fixing hole is formed on the upper surface of the side wall, a top cover fastening hole is formed around the top cover and at a position corresponding to the top cover fixing hole, a top cover fastening piece enters the top cover fixing hole through the top cover fastening hole to fix the top cover to the upper surface of the side wall, and a top cover waterproof hem which is folded and unfolded downwards and has an inclination angle of 15 ° is formed at the peripheral edge part of the top cover; and a side wall fixing flange edge which is used for being fixed with the top of the switch cabinet extends outwards from the bottom of the side wall, and fixing holes are formed in the side wall fixing flange edge at intervals.

The technical scheme provided by the utility model has the technical effects that: because the anti-return water retaining frame used for preventing condensed water from dripping into the frame cavity of the switch cabinet is additionally arranged in the ventilation frame and on the lower edge of the heat dissipation hole, water drops generated by condensation can be prevented from returning into the cabinet from the outside to the inside through the heat dissipation hole, the protection of electrical components in the cabinet is very facilitated, the risk of burning of a circuit short circuit and a tripping test in the cabinet is avoided, and the safety and the reliability of the switch cabinet in the service process are guaranteed.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention.

Fig. 2 is a side schematic view of the vent frame shown in fig. 1.

Fig. 3 is a schematic view of an included angle formed between a water retaining edge and a side wall of the water discharge frame of the water return prevention water retaining frame shown in fig. 1.

Fig. 4 is a first embodiment of a cross-sectional shape of the water returning prevention and blocking frame shown in fig. 1 to 3.

Fig. 5 is a diagram of a second embodiment of the cross-sectional shape of the water returning prevention and retaining frame shown in fig. 1 to 3.

Fig. 6 is a third embodiment of the cross-sectional shape of the water returning prevention and blocking frame shown in fig. 1 to 3.

Detailed Description

Example 1:

referring to fig. 1 to 3, a ventilation mechanism 1 is shown, the ventilation mechanism 1 includes a ventilation frame 11 and a top cover 12, the ventilation frame 11 is disposed on the top of the switch cabinet in a use state, and the bottom of the ventilation frame 11 forms an opening, the opening communicates with a cabinet cavity of the switch cabinet, the top cover 12 is covered on the upper portion of the ventilation frame 11 and closes the opening on the upper portion of the ventilation frame 11, a heat dissipation hole 112 is disposed on a side wall 111 of the ventilation frame 11, and the heat dissipation hole 112 enables a ventilation frame cavity 113 of the ventilation frame 11 enclosed by the side wall 111 to communicate with the outside.

The technical key points of the technical scheme provided by the utility model are as follows: the structure system of the ventilation device of the switch cabinet also comprises a water return prevention and retaining frame 2 for preventing condensed water from dripping into the cabinet cavity of the switch cabinet, and the water return prevention and retaining frame 2 is embedded on the lower edge of the heat dissipation hole 112 in a state of being closely combined with the inner wall of the side wall 111.

The ventilation frame 11 is a rectangular structure enclosed by four side walls 111, front, rear, left and right, and penetrating up and down, and in this embodiment, the ventilation frame 11 is a rectangular structure enclosed by four side walls 111, front, rear, left and right, having the same length and height, and the four side walls 111 form four right angles with each other and are preferably fixed to each other by welding or other similar means such as fasteners. Of course, the overall structure of the ventilation frame 11 may be obtained by press molding.

The heat dissipation holes 112 are disposed in the middle region of the sidewall 111 in the height direction, and the heat dissipation holes 112 formed in the sidewall 111 are rectangular holes arranged at intervals in the longitudinal direction. In this embodiment, the size of the heat dissipation hole 112 is preferably 7mm in width and 42mm in height, and if the IP40 protection level required by the standard cannot be met, a filter screen made of a material preferably stainless steel with a hole diameter smaller than 1mm may be disposed on the side of the sidewall 111 facing the ventilation frame cavity 113.

Referring to fig. 4 in conjunction with fig. 1 to 3, the water returning prevention and retaining frame 2 includes a positioning portion 21 of the drainage frame, the positioning portion 21 of the drainage frame is closely combined with the sidewall 111 in a gapless state (e.g., tightly combined with the sidewall 111 in an adhesive manner), and the positioning portion 21 of the drainage frame is flush with the lower edge of the heat dissipation hole 112 formed in the sidewall 111.

The water-return-preventing and retaining frame 2 further includes a drain frame retaining edge 22 for preventing water at the lower edge of the heat dissipating hole 112 from returning to the ventilation frame cavity 111, and the drain frame retaining edge 22 is formed by bending the upper edge of the height direction of the drain frame positioning portion 21.

An included angle smaller than 45 ° is formed between the water retaining edge 22 of the water discharge frame and the sidewall 111, and in the present embodiment, the included angle smaller than 45 ° is selected to be 15 °.

In the present embodiment and as shown in fig. 4, the cross-sectional shape of the water return prevention retaining frame 2 is zigzag, so that a transition portion 23 is formed between the water drainage frame positioning portion 21 and the water drainage frame retaining edge 22, and this structure of the water return prevention retaining frame 2 can play a good role in retaining water, specifically, when water tries to return from the heat dissipation hole 112 to the ventilation frame cavity 113, the water is blocked by the water drainage frame retaining edge 22, so that the water does not drip into the cabinet cavity of the switch cabinet, thereby showing the technical effects described in the above technical effect column of the applicant. In this embodiment, the water-returning and water-retaining frame 2 is preferably made of stainless steel plate.

As shown in fig. 1, a top cover fixing hole 1111 is formed on the upper surface of the side wall 111, a top cover fastening hole 122 is formed around the top cover 12 at a position corresponding to the top cover fixing hole 1111, a top cover fastening member enters the top cover fixing hole 1111 through the top cover fastening hole 122 to fix the top cover 12 to the upper surface of the side wall 111, and a top cover waterproof fold 121 which is folded downward and has an inclination angle of 15 ° is formed at the peripheral edge of the top cover 12; a side wall fixing flange 13 for fixing to the top of the switch cabinet extends outwardly from the bottom of the side wall 111, and fixing holes 131 are formed at intervals in the side wall fixing flange 13.

As shown in fig. 3, when the switch cabinet is disposed at an inclined angle α formed in the cabinet body, the water dropped from the upper portion of the switch cabinet will be guided away by the inclined top cover waterproof edge 121 of the top cover 12, and will not affect the heat dissipating holes 112, i.e., the water will not enter the ventilation frame cavity 113 through the heat dissipating holes 112, and the water splashed up partially will be blocked by the water retaining edge 22 of the drainage frame and will not enter the frame cavity of the switch cabinet. Furthermore, since the upper edge of the positioning portion 21 of the drain frame is flush with the lower edge of the heat dissipation hole 112, water can be well led away from the switch cabinet without affecting the electric components in the cabinet cavity. The utility model is mostly applied to indoor switch cabinets, but also can be applied to outdoor switch cabinets.

Example 2:

referring to fig. 5, the cross-sectional shape of the water returning prevention and retaining frame 2 is changed to a circular arc shape, and the rest is the same as that described in embodiment 1.

Example 3:

referring to fig. 6, the cross-sectional shape of the water return prevention water retaining frame 2 is simply changed to a hook shape, and the hook shape is formed by combining the aforementioned positioning leg 22 of the drain frame and the water retaining edge 22 of the circular arc-shaped drain frame. The rest is the same as described in example 1.

In conclusion, the technical scheme provided by the utility model overcomes the defects in the prior art, successfully completes the utility model task and truly realizes the technical effects of the applicant in the technical effect column.

Claims

1. A switch cabinet ventilation device with waterproof function comprises a ventilation mechanism (1), the ventilation mechanism (1) comprises a ventilation frame (11) and a top cover (12), wherein the periphery of the ventilation frame is hollowed, an opening is formed at the bottom of the ventilation frame, the ventilation frame (11) is arranged at the top of the switch cabinet in a use state, and is communicated with the cabinet cavity of the switch cabinet through the opening, the top cover (12) is matched with the upper part of the ventilation frame (11) in a covering way and seals the opening at the upper part of the ventilation frame (11), the side wall (111) of the ventilation frame (11) is provided with a heat radiation hole (112), the heat dissipation holes (112) enable a ventilation frame cavity (113) of a ventilation frame (11) enclosed by the side wall (111) to be communicated with the outside, it is characterized by also comprising a water return prevention and retaining frame (2) for preventing condensed water from dripping into the cabinet cavity of the switch cabinet, the water return prevention and blocking frame (2) is embedded on the lower edge of the heat dissipation hole (112) in a state of being closely combined with the inner wall of the side wall (111).

2. The waterproof switch cabinet ventilation device according to claim 1, wherein the ventilation frame (11) is formed by jointly enclosing a front side wall, a rear side wall, a left side wall, a right side wall (111), and a rectangular shape which is through from top to bottom.

3. The waterproof ventilation device for switch cabinet according to claim 2, wherein the heat dissipation holes (112) are disposed in the middle region of the sidewall (111) in the height direction and arranged at intervals.

4. The waterproof ventilation device for switch cabinet according to claim 3, wherein the heat dissipation holes (112) formed in the side wall (111) are rectangular holes arranged at intervals in the longitudinal direction.

5. The waterproof ventilating device of switch cabinet according to claim 4, wherein the water-returning-preventing and retaining frame (2) comprises a positioning portion (21) of the drainage frame, the positioning portion (21) of the drainage frame is closely combined with the inner wall of the side wall (111) in a gapless state, and the positioning portion (21) of the drainage frame is flush with the lower edge of the heat dissipating hole (112) formed in the side wall (111).

6. The waterproof switch cabinet ventilating device according to claim 5, wherein the water return preventing and retaining frame (2) further comprises a water draining frame retaining edge (22) for preventing water at the lower edge of the heat dissipating hole (112) from returning to the ventilating frame cavity (111), and the water draining frame retaining edge (22) is formed by bending the upper edge of the height direction of the water draining frame positioning portion (21).

7. The waterproof switch cabinet ventilating device according to claim 6, wherein an included angle of less than 45 ° is formed between the water retaining edge (22) of the water draining frame and the side wall (111).

8. The waterproof switch cabinet ventilating device according to claim 7, wherein the angle smaller than 45 ° is 15 °.

9. The waterproof switch cabinet ventilating device according to claim 6, wherein the cross-sectional shape of the water returning prevention retaining frame (2) is a zigzag shape, an arc shape or a scale hook shape, and when the cross-sectional shape is a zigzag shape, a transition portion (23) is formed between the positioning portion (21) of the drain frame and the retaining edge (22) of the drain frame.

10. The ventilation device of the switch cabinet with the waterproof function according to claim 2, wherein a top cover fixing hole (1111) is formed on the upper surface of the side wall (111), a top cover fastening hole (122) is formed around the top cover (12) and at a position corresponding to the top cover fixing hole (1111), the top cover (12) is fixed to the upper surface of the side wall (111) by the top cover fastening member entering the top cover fixing hole (1111) through the top cover fastening hole (122), and a top cover waterproof fold (121) which is folded downward and has an inclination angle of 15 ° is formed at the peripheral edge of the top cover (12); and a side wall fixing flange edge (13) for fixing with the top of the switch cabinet extends outwards from the bottom of the side wall (111), and fixing holes (131) are arranged on the side wall fixing flange edge (13) at intervals.