Explosion-proof case and power electronic equipment

Abstract

The invention discloses an explosion-proof case and power electronic equipment, the explosion-proof case comprises a case main body and a cover fixedly mounted at the top of the case main body, a plurality of first cover hole concave bags are arranged at one pair of side edges of the cover, a plurality of second cover hole difference concave bags are arranged at the other pair of side edges of the cover, first concave bag via holes are formed in the first cover hole concave bags, and second concave bag via holes are formed in the second cover hole concave bags. The first cover hole difference concave bag is provided with a first concave bag difference through hole, the second cover hole difference concave bag is provided with a second concave bag difference through hole, a plurality of case body connecting supporting pieces corresponding to the first cover hole concave bag and the second cover hole difference concave bag are installed on the top annular face of the case body, and matched case cover connecting pieces are arranged in the second concave bag difference through hole and the first concave bag through hole. The explosion-proof case has the advantages that a good explosion-proof effect can be achieved, the existing case and a cover body are slightly changed, the influence on the appearance is small, the application range of the explosion-proof case is widened, the explosion-proof cost is reduced, and compared with explosion-proof of an explosion-proof valve, the explosion-proof reliability of the explosion-proof case is higher.

Description

Technical Field

[0001] The present invention relates to the field of power electronic equipment casings, in particular to an explosion-proof chassis and power electronic equipment. Background Art

[0002] The primary function of a photovoltaic inverter is to convert the direct current (DC) generated by solar panels into alternating current (AC) for household appliances. For power electronic equipment like photovoltaic inverters, the explosion-proof performance of the chassis is a key consideration. Currently, to ensure this performance, explosion-proof valves are typically installed on the chassis. This significantly alters the chassis structure, resulting in high explosion-proof costs. Furthermore, the valves are prone to failure, resulting in low explosion-proof reliability. Furthermore, the explosion-proof valves significantly affect the chassis's appearance, limiting the scope of application for these chassis. How to design an explosion-proof chassis to reduce explosion-proof costs and improve explosion-proof reliability is a problem that currently needs to be solved urgently by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide an explosion-proof chassis and power electronic equipment in order to solve the above problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical solutions: A kind of explosion-proof chassis and power electronic equipment, including a chassis body and a cover installed and fixed on the top of the chassis body, a pair of side edges of the cover are provided with a plurality of first cover hole recesses, and another pair of side edges of the cover are provided with a plurality of second cover hole difference recesses, the first cover hole recesses are provided with first recessed through-holes, the second cover hole difference recesses are provided with second recessed difference through-holes, a plurality of chassis body connecting supports corresponding to the first cover hole recesses and the second cover hole difference recesses are installed on the top annular surface of the chassis body, the second recessed difference through-holes and the first recessed through-holes are both provided with matching cover connecting members, and the bottom end of the cover connecting member is fixedly installed on the chassis body connecting support.

[0005] Furthermore, the tops of the second concave differential via hole and the first concave via hole are both padded with concave inner gasket rings that match them.

[0006] Furthermore, the inner gasket ring piece of the concave package is one of a weak connection gasket ring piece and a strong connection gasket ring piece, and a plurality of structural strip holes are provided on the annular surface of the weak connection gasket ring piece.

[0007] Furthermore, the cover connector is composed of a screw and a rod cap fixed on the top of the screw, and a fixing threaded hole is provided on the chassis body connecting support, and the bottom end of the screw is threadedly connected to the fixing threaded hole.

[0008] Furthermore, a top ring is fixedly installed along the side of the inner ring of the chassis body, and a sealing gasket is provided on the top of the top ring.

[0009] Furthermore, a plurality of weakening grooves are provided on the hole wall of the second concave differential via hole, and the plurality of weakening grooves are distributed in a radial shape.

[0010] In addition, the present invention further provides a power electronic device, including an explosion-proof chassis, wherein the explosion-proof chassis is the explosion-proof chassis described in any of the above solutions.

[0011] The beneficial effects of the present invention are as follows: the explosion-proof chassis and power electronic equipment of the present invention form a strong and weak distribution by setting different concave holes on the cover, and cooperate with the strong and weak connection of the gasket to achieve a better explosion-proof effect, and the modification of the existing chassis and cover is relatively small, the appearance is slightly affected, the application range of the explosion-proof chassis is expanded, and the explosion-proof cost is reduced; Compared with explosion-proof valves, its explosion-proof reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of an explosion-proof chassis and power electronic equipment according to the present invention; Figure 2 This is a top view of the structure of an explosion-proof chassis and power electronic equipment according to the present invention; Figure 3 This is an embodiment of the first and second cover holes of an explosion-proof chassis and power electronic equipment of the present invention. Figure 1 ; Figure 4 This is an embodiment of the first and second cover holes of an explosion-proof chassis and power electronic equipment of the present invention. Figure 2 ; Figure 5 The invention relates to a concave inner gasket for explosion-proof chassis and power electronic equipment. Figure 1 ; Figure 6 The invention relates to a concave inner gasket for explosion-proof chassis and power electronic equipment. Figure 2 .

[0013] The following are the descriptions of the reference numerals: 1. Chassis body; 2. Machine cover; 3. Machine cover connector, 31. Rod cap, 32. Screw; 4. Chassis body connecting support; 5. Edge top ring; 6. First cover hole concave, 61. First concave through hole; 7. Second cover hole differential concave, 62. Second concave differential through hole; 8. Gasket inside the concave, 81. Weak connection gasket, 82. Strong connection gasket. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 - Figure 6 As shown, an explosion-proof chassis includes a chassis body 1 and a cover 2 installed and fixed on the top of the chassis body 1.

[0015] The machine cover 2 usually adopts a quadrilateral cover body, and a pair of side edges of the machine cover 2 are provided with several first cover hole concave bulges 6, and another pair of side edges of the machine cover 2 are provided with several second cover hole difference concave bulges 7. The first cover hole concave bulge 6 is provided with a first concave bulge through-hole 61, and the second cover hole difference concave bulge 7 is provided with a second concave bulge difference through-hole 62. The second concave bulge difference through-hole 62 and the first concave bulge through-hole 61 have different aperture diameters, etc., which are used to achieve the effect of strong and weak distribution, and the explosion-proof effect can be achieved through relatively simple aperture modification.

[0016] The chassis body 1 is a coverless chassis, which is produced according to the shape of the internal electronic equipment. Several chassis body connecting supports 4 corresponding to the first cover hole concave 6 and the second cover hole difference concave 7 are installed on the top ring surface of the chassis body 1. The chassis body connecting supports 4 are used to support and fix the cover 2, and are distributed below the first cover hole concave 6 and the second cover hole difference concave 7.

[0017] Matching cover connectors 3 are provided in the second concave difference through-hole 62 and the first concave through-hole 61 , and the bottom ends of the cover connectors 3 are fixedly mounted on the chassis main body connecting support 4 .

[0018] When the explosion-proof chassis is actually used, the strength distribution can be achieved relatively easily by modifying the aperture size and wall thickness of the second concave difference through-hole 62 and the first concave through-hole 61, so that the weaker strength areas begin to loosen, and a gap appears between the chassis body 1 and the cover 2, and the internal gas is discharged from the gap to achieve pressure relief and explosion prevention.

[0019] In some specific embodiments, the tops of the second concave difference via 62 and the first concave via 61 are padded with concave inner gaskets 8 that match them, and each concave inner gasket 8 is selected in a differentiated manner. The differentiation is mainly reflected in its size, thickness and type, that is, the concave inner gaskets 8 on the second concave difference via 62 and the first concave via 61 can be selected in different sizes, thicknesses and types, so as to further improve its explosion-proof effect. The concave inner gasket 8 adopts one of a weak connection gasket 81 and a strong connection gasket 82. The weak connection gasket 81 has a number of structural strip holes on its annular surface for reducing the mechanical strength of the gasket 81. The strong connection gasket 82 does not have any structural holes except the center ring hole.

[0020] In some specific embodiments, the cover connector 3 consists of a screw 32 and a rod cap 31 fixed to the top of the screw 32. A fixed threaded hole is provided on the chassis body connecting support 4, and the bottom end of the screw 32 is threadedly connected to the fixed threaded hole for easy disassembly.

[0021] In some specific embodiments, a top ring 5 is fixedly installed along the side of the inner ring of the chassis body 1. The top ring 5 can be integrally formed with the chassis body 1 through mold manufacturing, or can be mechanically fixed and installed to achieve the sealing of the explosion-proof chassis under normal conditions. A sealing gasket strip is provided on the top of the top ring 5, which is placed under the cover 2.

[0022] In some specific embodiments, the second concave package differential via hole 62 can be differentiated from the first concave package via hole 61 by changing the aperture size. Alternatively, a plurality of weakening grooves can be provided on the hole wall of the second concave package differential via hole 62. The plurality of weakening grooves are distributed in a radial shape to reduce the mechanical strength of the second concave package differential via hole 62, making it more differentiated and forming a strong-weak distribution of explosion-proof holes. In some more specific embodiments, the first cover hole concave bulge 6 can be replaced by a screw sleeve, thereby achieving the result of differentiated mechanical strength of the first cover hole concave bulge 6 and the second cover hole difference concave bulge 7, and coordinating the differentiated hole connection strength of the cover connectors with different size strengths, the second concave bulge difference through hole 62 and the first concave bulge through hole 61, thereby increasing its explosion-proof effect.

[0023] In addition, the present invention also provides a power electronic device, including an explosion-proof chassis, which is the explosion-proof chassis described in any of the above schemes. Since the explosion-proof chassis has the above-mentioned technical effects, the electronic device having the explosion-proof chassis should also have corresponding technical effects, which will not be repeated here.

[0024] It is understood that the power electronic equipment described above may specifically be related power electronic equipment such as inverters, or other power electronic equipment. Of course, in addition to power electronic enclosures, enclosures in other application scenarios with explosion risks may also adopt the aforementioned explosion-proof enclosure structure, and no further specific limitations are given here.

[0025] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. An explosion-proof chassis, characterized by: It includes a chassis main body and a cover installed and fixed on the top of the chassis main body, a pair of side edges of the cover are provided with a plurality of first cover hole recesses, and another pair of side edges of the cover are provided with a plurality of second cover hole difference recesses, the first cover hole recesses are provided with a first recess through-hole, the second cover hole difference recesses are provided with a second recess difference through-hole, and the top annular surface of the chassis main body is provided with a plurality of chassis main body connecting supports corresponding to the first cover hole recesses and the second cover hole difference recesses respectively, the second recess difference through-holes and the first recess through-holes are both provided with matching cover connecting members, and the bottom end of the cover connecting member is fixedly installed on the chassis main body connecting support.

2. The explosion-proof chassis according to claim 1, characterized in that: The tops of the second concave differential via hole and the first concave via hole are both padded with concave inner pad rings that match them.

3. The explosion-proof chassis according to claim 2, characterized in that: The inner gasket ring piece of the concave package is a weak connection gasket ring piece or a strong connection gasket ring piece, and a plurality of structural strip holes are provided on the annular surface of the weak connection gasket ring piece.

4. The explosion-proof chassis according to claim 1, characterized in that: The cover connecting piece is composed of a screw rod and a rod cap fixed on the top of the screw rod. A fixing threaded hole is provided on the chassis body connecting support piece. The bottom end of the screw rod is threadedly connected to the fixing threaded hole.

5. The explosion-proof chassis according to claim 1, characterized in that: A top ring is fixedly installed along the side of the inner ring of the chassis body, and a sealing gasket strip is provided on the top of the top ring.

6. The explosion-proof chassis according to claim 1, characterized in that: A plurality of weakened grooves are provided on the hole wall of the second concave differential via hole, and the plurality of weakened grooves are distributed in a radial shape.

7. A power electronic device, comprising an explosion-proof chassis, characterized in that: The explosion-proof chassis is an explosion-proof chassis according to any one of claims 1 to 6.

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