A sealed electric box for use in harsh environments

Abstract

A sealed electrical box for use in harsh environments, belonging to the technical field of electrical device protection. It comprises a sealed box module, wherein a ventilation duct is provided inside the sealed box module, wherein the ventilation duct is provided with air diffusion holes, and both ends extend to the outside of the sealed box module and are connected to ventilation equipment, and a wiring module is provided on the side of the sealed box module. It is used to solve the problem of short service life of existing electrical components in harsh environments, and can ensure that electrical components are not damaged by the external harsh environment, while effectively reducing the temperature inside the box, improving the heat dissipation performance, being more conducive to the protection of internal electronic components, and also increasing the selectivity for the arrangement of electronic components and circuits of the equipment.

Description

Technical Field

[0001] The invention relates to a sealed electric box used in harsh environments, belonging to the technical field of electric device protection. Background Art

[0002] At present, due to the adverse effects of harsh environments on the performance of electronic components, electronic components are generally placed outside the harsh environment when in use. However, under special conditions, when the components need to work inside the harsh environment, it is difficult to solve this problem;

[0003] In the prior art, application number CN201821101976.8 discloses a sealed electrical box which is resistant to high temperature, moisture and internal pollution, including a box body and a door panel, a sealing pad is arranged in the door panel, a door panel row hinge is arranged on one side of the outer periphery of the door panel, and a reverse bent flange is arranged on the other three sides of the door panel, a wire outlet hole is opened on the box body, a pipeline sealing block is arranged at the wire outlet hole, a box body row hinge is connected to the box body on one side of the outer periphery of the box opening, the box body and the door panel are connected through the box body row hinge and the door panel row hinge, a locking seat is arranged on the other three sides of the box body located on the outer periphery of the box opening, a locking nut is arranged on the locking seat, and a pressing seat is connected to the locking seat through a locking bolt, and a pressing hook for pressing the reverse bent flange is arranged at the front end of the pressing seat, which can ensure that it can be used for a long time in high temperature, water mist and oil mist places, thereby reducing the failure rate of the electrical box. Although this technical solution improves the sealing of the electrical box, its internal heat dissipation is poor and it is easy to cause damage to the internal electrical components, affecting the service life of the electronic components.

[0004] In view of the above-mentioned existing technical conditions, the applicant of the present invention has conducted a lot of repeated and beneficial explorations, and finally achieved effective results in the product, and formed the technical solution to be introduced below. Summary of the invention

[0005] In view of the above-mentioned deficiencies, the present invention provides a sealed electrical box for use in harsh environments, which can ensure that electrical components are protected from damage by the harsh external environment, while effectively reducing the temperature inside the box, improving the heat dissipation performance, being more conducive to the protection of internal electronic components, and increasing the selectivity for the arrangement of electronic components and circuits of the equipment.

[0006] The present invention is achieved through the following technical solutions:

[0007] A sealed electrical box for use in harsh environments comprises a sealed box module, wherein a ventilation duct is provided inside the sealed box module, the ventilation duct is provided with air diffusion holes, and both ends extend to the outside of the sealed box module and are connected to ventilation equipment, and a wiring module is provided on the side of the sealed box module.

[0008] Furthermore, the sealed box module includes an electric box body, an electric box cover and an electric box bottom plate. The electric box body is an annular plate, and the electric box cover and the electric box bottom plate are flange-connected to the upper and lower openings of the electric box body respectively.

[0009] Furthermore, an annular upper mounting plate and a lower mounting plate are welded to the outer edges of the upper and lower sides of the electric box body in sequence, and the upper mounting plate and the lower mounting plate are respectively provided with sealing grooves along the outer sides of the annular shapes, and the sealing grooves are provided with O-rings for improving the sealing performance, and the electric box cover plate and the electric box bottom plate are flange-connected to the outer sides of the upper mounting plate and the lower mounting plate in sequence through external mounting screws.

[0010] Furthermore, reflective plates for reducing heat radiation are respectively provided on the outer sides of the upper mounting plate and the lower mounting plate.

[0011] Furthermore, the wiring module adopts an aviation plug, and the electric box side panels are welded on the left and right sides of the electric box body respectively. The electric box side panels are provided with multiple side panel connecting plates, and the aviation plug is connected to the side panel connecting plate flange through the plug connecting plates arranged at the rear end, and the inner wall of the electric box body is provided with plug wire holes corresponding to the side panel connecting plates.

[0012] Furthermore, two ventilation pipe openings corresponding to one side panel of the electric box are welded on the electric box body, one side of the two ventilation pipe openings are respectively connected to the two ends of the ventilation pipe inside the electric box body, and the other ends extend to the outside of the electric box body and are connected to quick-screw connectors, and the quick-screw connectors are connected to the ventilation equipment.

[0013] Furthermore, the ventilation equipment includes an air supply pump and an air exhaust pump, and the two quick-screw connectors are respectively connected to the air supply pipeline and the air exhaust pipeline. The air supply pipeline and the air exhaust pipeline are provided with pressure valves for controlling the gas flow rate, and the far ends are respectively connected to the air supply pump and the air exhaust pump.

[0014] Furthermore, a pipe fixing frame is provided on the bottom plate of the electric box, and the ventilation duct is arranged inside the electric box body by cooperating with the pipe fixing frame. A cam bearing follower and a handle are provided on the outer side of the electric box cover for facilitating the movement of the box body.

[0015] Furthermore, a plurality of component placement clips are provided on the bottom plate of the electrical box.

[0016] Furthermore, the electric box body, the upper mounting plate, the lower mounting plate, the ventilation pipe port, the air supply pipeline, the exhaust pipeline and the ventilation duct are all made of stainless steel; the electric box body is made of stainless steel material bent into a ring and welded by contact edges; the upper mounting plate and the lower mounting plate are respectively made of two L-shaped stainless steel plates welded in opposite directions, and the welding method is argon arc welding; the stainless steel material model is SUS-304.

[0017] Beneficial effects of the present invention:

[0018] 1. It can protect electrical components from damage by harsh external environments, effectively reduce the temperature inside the box, improve heat dissipation performance, and be more conducive to the protection of internal electronic components. It also increases the selectivity of the arrangement of electronic components and circuits of the equipment;

[0019] 2. The setting of the handle and cam bearing follower facilitates the personnel to participate in the movement and fixation of the box, greatly saving manpower and material resources, making it possible for electronic components to work in a vacuum or harsh environment, and improving production efficiency;

[0020] 3. Welding flanges can save process time to the greatest extent, facilitate processing and save costs;

[0021] 4. O-rings are installed on the bottom plate and cover plate of the electric box to facilitate overall sealing; reflective plates are installed on the outside of the bottom plate and cover plate of the electric box to reduce heat radiation and protect the box temperature;

[0022] 5. Ventilation holes are opened on the ventilation pipe inside the electric box. Under the gas circulation of the external air supply pump and the air extraction pump, the electronic components in the box can be fully cooled. At the same time, the pressure valve can be adjusted according to the external ambient temperature and the internal temperature to change the flow rate of the heat exchange gas and adjust the heat dissipation intensity, thereby improving practicality.

[0023] 6. Argon arc welding is adopted for welding. Argon gas protection can isolate the adverse effects of oxygen, nitrogen, hydrogen, etc. in the air on the arc and molten pool, reduce the burning of alloy elements, so as to obtain dense, spatter-free, high-quality welding joints, and the heat-affected zone is narrow. The welded parts have little stress, deformation and crack tendency, which ensures the sealing of the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the electrical box main body in the present invention;

[0025] Figure 2 It is a schematic diagram of the structural arrangement inside the main body of the electric box in the present invention;

[0026] Figure 3 It is a schematic diagram of the position structure of the side plate connecting piece on the side plate of the electric box in the present invention;

[0027] Figure 4 It is a schematic diagram of the overall structure of the present invention.

[0028] In the figure, the electric box body 1, the upper mounting plate 11, the lower mounting plate 12, the ventilation pipe opening 13, the plug wire hole 14, the sealing accommodating groove 15, the O-ring 151, the electric box cover 2, the reflector 21, the cam bearing follower 22, the handle 23, the electric box bottom plate 3, the pipe fixing frame 31, the component placement clamp 32, the mounting screw 4, the electric box side panel 5, the side panel connecting piece 51, the aviation plug 6, the plug connecting piece 61, the air supply pump 7, the air supply pipeline 71, the air extraction pump 8, the air extraction pipeline 81, the ventilation pipeline 9, the ventilation hole 91, the pressure valve 92, and the quick-tighten joint 93. DETAILED DESCRIPTION

[0029] For better understanding, embodiments of the present invention are explained in detail with reference to the accompanying drawings.

[0030] A sealed electric box for use in harsh environments, comprising an electric box body 1, an upper mounting plate 11, a lower mounting plate 12, a ventilation pipe opening 13, a plug wire hole 14, a sealing accommodating groove 15, an O-ring 151, an electric box cover 2, a reflector 21, a cam bearing follower 22, a handle 23, an electric box bottom plate 3, a pipe fixing frame 31, a component placement clamp 32, mounting screws 4, an electric box side plate 5, a side plate connecting piece 51, an aviation plug 6, a plug connecting piece 61, an air supply pump 7, an air supply pipeline 71, an air extraction pump 8, an air extraction pipeline 81, a ventilation pipeline 9, a ventilation hole 91, a pressure valve 92, and a quick-tighten joint 93, such as Figure 1 As shown, the electric box body 1 adopts an annular plate, and an annular upper mounting plate 11 and a lower mounting plate 12 are welded to the outer edges of the upper and lower sides in sequence, and electric box side plates 5 are welded to the left and right sides respectively. The upper mounting plate 11 and the lower mounting plate 12 are respectively provided with sealing accommodating grooves 15 along the outer sides of the annular rings, and the electric box side plates 5 are provided with a plurality of side plate connecting plates 51. The inner wall of the electric box body 1 is respectively provided with plug wire holes 14 for accommodating the transmission line corresponding to the side plate connecting plates 51, and the inner wall of the electric box body 1 is also welded with two ventilation pipe openings 13 corresponding to the electric box side plates 5 on one side.

[0031] like Figure 2 As shown, the sealing groove 15 is provided with an O-ring 151 for improving the sealing performance, the lower mounting plate 12 is flange-connected to the bottom plate 3 of the electric box through the external mounting screws 4, a pipe fixing frame 31 is provided on the bottom plate 3 of the electric box, and a ventilation duct 9 is installed through the pipe fixing frame 31, a plurality of ventilation holes 91 are evenly provided on the wall of the ventilation duct 9, and the two ends are respectively connected with the two ventilation pipe openings 13 on the electric box body 1, the ventilation pipe openings 13 extend to the outside of the electric box body 1 and are respectively provided with quick-tightening joints 93, and a plurality of component placement clips 32 are also provided on the bottom plate 3 of the electric box.

[0032] like Figure 3 As shown, the upper mounting plate 11 is flange-connected to the electric box cover 2 via external mounting screws 4. The electric box cover 2 is aligned with the outer edge of the upper mounting plate 11, and a cam bearing follower 22 and a handle 23 are provided on the outer side for facilitating movement of the box position. The outer sides of the upper mounting plate 11 and the lower mounting plate 12 are provided with reflectors 21 for reducing heat radiation.

[0033] like Figure 4 As shown, there are multiple aviation plugs 6, and they are flange-connected to the side panel connecting piece 51 through the plug connecting piece 61 set at the rear end respectively. The two quick-screw connectors 93 are respectively connected to the air supply pipeline 71 and the air exhaust pipeline 81. The air supply pipeline 71 and the air exhaust pipeline 81 are both provided with a pressure valve 92 for controlling the gas flow rate, and the far ends are respectively provided with an air supply pump 7 and an air exhaust pump 8 for promoting gas circulation.

[0034] The electric box body 1 is made of stainless steel and bent into a ring shape, and then welded by contact edges. The upper mounting plate 11 and the lower mounting plate 12 are respectively made of two L-shaped stainless steel plates welded in opposite directions. The welding method adopts argon arc welding. Argon gas protection can isolate the adverse effects of oxygen, nitrogen, hydrogen, etc. in the air on the arc and the molten pool, reduce the burning of alloy elements, so as to obtain a dense, spatter-free, high-quality welded joint, and the heat-affected zone is narrow, and the welded weldment has little stress, deformation, and crack tendency, so as to ensure the sealing of the box; the ventilation pipe port 13, air supply pipeline 71, exhaust pipeline 81 and ventilation pipeline 9 are all made of stainless steel, and the stainless steel material models include but are not limited to SUS-304.

[0035] The cam bearing follower 22 and the handle 23 are fixed to the upper mounting plate 11 by means of mounting screws 4. The reflector 21 is fixed to the outer sides of the upper mounting plate 11 and the lower mounting plate 12 by means of mounting screws 4. The mounting screws 4 are hexagon socket bolts, which are easy to operate and provide a smoother surface.

[0036] The working process of the sealed box is as follows:

[0037] First, connect the flange of the electric box bottom plate 3 to the lower mounting plate 12 of the electric box body 1, clamp and install the pre-configured electrical components on the component placement clamps 32 of the electric box bottom plate 3 in sequence, pass the wires of the electrical components through the plug wire holes 14 on the electric box body 1 and connect them to the aviation plug 6, place the ventilation duct 9 on the duct fixing frame 31, and connect the electric box cover 2 to the upper mounting plate 11 of the electric box body 1 with a flange.

[0038] Secondly, install the quick-tightening joints 93 connected to the two ends of the ventilation pipe 9 with the air supply pipeline 71 and the air exhaust pipeline 81 of predetermined length respectively, and connect the air supply pipeline 71 and the air exhaust pipeline 81 to the air supply pump 7 and the air exhaust pump 8 in turn, and adjust the pressure in the pipeline through the pressure valve 92.

[0039] For those skilled in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the protection scope of the present invention.

Claims

1. A sealed electrical box used in harsh environments. Features: It includes a sealed box module, wherein a ventilation duct is provided inside the sealed box module, the ventilation duct is provided with air diffusion holes, and both ends extend to the outside of the sealed box module and are connected to ventilation equipment, and a wiring module is provided on the side of the sealed box module; The sealed box module comprises an electric box body, an electric box cover and an electric box bottom plate. The electric box body is a ring plate, and the electric box cover and the electric box bottom plate are flange-connected to the upper and lower openings of the electric box body respectively. The wiring module adopts an aviation plug, and the left and right sides of the electric box body are respectively welded with electric box side panels, and the electric box side panels are provided with a plurality of side panel connecting pieces, and the aviation plugs are respectively connected to the side panel connecting piece flanges through the plug connecting pieces provided at the rear end, and the inner wall of the electric box body is respectively provided with plug wire holes corresponding to the side panel connecting pieces; Two ventilation pipe openings corresponding to one side of the electric box side plate are welded on the electric box body, one side of the two ventilation pipe openings is respectively connected to the two ends of the ventilation pipe inside the electric box body, and the other end is respectively extended to the outside of the electric box body and connected to a quick-tighten joint, and the quick-tighten joint is connected to the ventilation equipment; The ventilation equipment includes an air supply pump and an air extraction pump. The two quick-tightening joints are respectively connected to an air supply pipeline and an air extraction pipeline. The air supply pipeline and the air extraction pipeline are provided with pressure valves for controlling the gas flow rate, and the far ends are respectively connected to the air supply pump and the air extraction pump; The bottom plate of the electric box is provided with a pipe fixing frame, the ventilation pipe is arranged inside the main body of the electric box by cooperating with the pipe fixing frame, and the outer side of the electric box cover is provided with a cam bearing follower and a handle for facilitating the movement of the box body; A plurality of component placement clips are arranged on the bottom plate of the electrical box.

2. A sealed electrical box for use in harsh environments as claimed in claim 1, Its characteristics are: The upper and lower outer edges of the electric box body are welded with an annular upper mounting plate and a lower mounting plate in sequence. The upper mounting plate and the lower mounting plate are respectively provided with sealing grooves along the outer sides of the annular shapes. The sealing grooves are provided with O-rings for improving the sealing performance. The electric box cover and the electric box bottom plate are flange-connected to the outer sides of the upper mounting plate and the lower mounting plate in sequence through external mounting screws.

3. A sealed electrical box for use in harsh environments as claimed in claim 2, Its characteristics are: Reflective plates for reducing heat radiation are respectively arranged on the outer sides of the upper mounting plate and the lower mounting plate.

4. A sealed electrical box for use in harsh environments as claimed in claim 1, Its characteristics are: The electric box body, upper mounting plate, lower mounting plate, ventilation pipe port, air supply pipeline, exhaust pipeline and ventilation duct are all made of stainless steel; the electric box body is made of stainless steel material bent into a ring and welded by contact edges; the upper mounting plate and the lower mounting plate are respectively made of two L-shaped stainless steel plates welded in opposite directions, and the welding method is argon arc welding; the stainless steel material model is SUS-304.

Images