Double relief buffer structure and explosion-proof and intrinsic safety type power supply box

Abstract

The application discloses a double pressure relief buffering structure and an explosion-proof and intrinsic safety type power supply box, and relates to the field of explosion-proof electric appliances. The double pressure relief buffering structure specifically comprises a base, an explosion-proof net, a plurality of explosion-proof plates and a top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of explosion-proof plates are sequentially arranged between the base and the top layer pressing plate. The explosion-proof net and the plurality of

Description

Technical Field

[0001] This invention relates to the field of explosion-proof electrical equipment, and in particular to a dual pressure relief buffer structure and an explosion-proof and intrinsically safe power supply box. Background Technology

[0002] According to GB / T China 3836 "Explosive Atmospheres," explosive atmospheres include explosive gas atmospheres and explosive dust atmospheres, classified into Class I, Class II, and Class III. Class I electrical equipment is used in coal mine methane gas environments, and battery power supply products used in underground coal mines are subject to stricter requirements and key controls. AQYQ-AAC-2021-01 "General Safety Technical Requirements for Safety Marks of Mining Products: China Mining Explosion-proof Lithium-ion Battery Power Supply" clearly requires that lithium-ion batteries used in explosion-proof enclosures in coal mines "should be placed in an independent explosion-proof chamber," "the battery chamber should be able to pass a static pressure test of 1.5 MPa," and "when the battery capacity of the battery chamber exceeds a certain range, pressure relief measures that meet explosion-proof requirements should be provided." Although some pressure relief solutions exist, they all have some drawbacks. For example, using sintered powder metallurgy as the core element for explosion-proof pyroelectric properties to achieve pressure relief is problematic. Sintered powder metallurgy suffers from uneven porosity and poor strength, posing a safety hazard under the impact of instantaneous explosion pressure during use. Other methods employ machined flat bosses to control explosion-proof gaps within 0.2mm, using multi-layered gaps to divert and block flame while releasing heat energy to achieve pressure relief. High-precision machining requires high-precision machine tools and wire cutting, significantly increasing processing costs and making it difficult to guarantee accuracy. During production, handling, and disassembly, the explosion-proof surfaces must be protected from scratches and debris, introducing numerous process control steps, increasing costs, and introducing many uncertain risks. Summary of the Invention

[0003] The purpose of this invention is to provide a dual pressure relief buffer structure and an explosion-proof and intrinsically safe power supply box, which reduces the production cost of pressure relief devices, lowers safety hazards, and makes the equipment safer and more reliable.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] A dual pressure relief buffer structure specifically includes: a base, an explosion-proof mesh, multiple explosion-proof plates, and a top pressure plate;

[0006] The explosion-proof mesh and the multiple layers of explosion-proof plates are sequentially arranged between the base and the top pressure plate.

[0007] Optionally, the dual pressure relief buffer structure further includes a mesh groove plate, in which a first circular hole and a second circular hole are provided in the middle. The first circular hole and the second circular hole are concentric circles. The radius of the first circular hole is larger than the radius of the second circular hole. The first circular hole is close to the base, and the second circular hole is close to the multi-layer explosion-proof plate. The explosion-proof mesh is disposed in the first circular hole.

[0008] Optionally, the dual pressure relief buffer structure further includes multiple adjusting pads, which are disposed between two adjacent explosion-proof plates.

[0009] Optionally, the adjusting shim is made of stainless steel, and the adjusting gap of the adjusting shim is 0.05mm-0.25mm.

[0010] Optionally, the base, the explosion-proof mesh, the multiple layers of explosion-proof plates, and the top pressure plate are connected and fixed by threaded holes.

[0011] Optionally, the explosion-proof mesh is a metal wire mesh with uniform porosity, and the metal wire mesh has a microporous structure.

[0012] Optionally, the dual pressure relief buffer structure also includes an outer cover, wherein the explosion-proof outer cover is fixed to the base by welding.

[0013] An explosion-proof and intrinsically safe power supply box with a dual pressure relief and buffer structure specifically includes: an explosion-proof shell and the aforementioned dual pressure relief and buffer structure;

[0014] The explosion-proof enclosure is provided with an electrical cavity, a battery cavity, and a wiring cavity;

[0015] The electrical cavity and the wiring cavity are arranged side by side above the battery cavity;

[0016] The dual pressure relief buffer device is located at a preset position on the explosion-proof housing, and the preset position is located on the side wall of the battery cavity.

[0017] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0018] This invention achieves pressure relief by sequentially installing an explosion-proof mesh and multiple explosion-proof plates between the base and the top pressure plate. Explosive gas is propelled by pressure through the explosion-proof mesh, which blocks the flame and releases some heat energy. After being buffered by the explosion-proof mesh, the gas flow passes through the narrow explosion-proof cavity formed by the multiple explosion-proof plates, and then releases pressure again through the multi-layer explosion-proof joint surface, achieving a safer state. This reduces the production cost of the pressure relief device, lowers safety hazards, and makes the equipment safer and more reliable. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A cross-sectional view of the dual pressure relief buffer structure provided in an embodiment of the present invention;

[0021] Figure 2 This is an external structural diagram of an explosion-proof and intrinsically safe power supply box with a dual pressure relief buffer structure provided in an embodiment of the present invention.

[0022] Symbol explanation:

[0023] Explosion-proof enclosure-1, electrical cavity-2, battery cavity-3, wiring cavity-4, double pressure relief buffer structure-31, base-311, mesh trough plate-312, explosion-proof mesh-313, multi-layer explosion-proof plate-314, top pressure plate-315, adjusting pad-316, fastening screw-317, outer cover-318. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The purpose of this invention is to provide a dual pressure relief and buffer structure and an explosion-proof and intrinsically safe power supply box. By sequentially setting an explosion-proof mesh and multiple explosion-proof plates between the base and the top pressure plate, the explosive gas is pushed by pressure through the explosion-proof mesh. The explosion-proof mesh blocks the flame and releases some heat energy, thereby achieving the effect of pressure relief. After the explosive gas is buffered by the explosion-proof mesh, the airflow passes through the narrow explosion-proof cavity composed of multiple explosion-proof plates, and then releases pressure again through the multi-layer explosion-proof joint surface, achieving a safer state. This reduces the production cost of the pressure relief device, reduces safety hazards, and makes the equipment safer and more reliable.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 As shown, the present invention provides a dual pressure relief buffer structure 31, which specifically includes: a base 311, an explosion-proof mesh 313, a multi-layer explosion-proof plate 314, and a top pressure plate 315.

[0028] The explosion-proof mesh 313 and the multi-layer explosion-proof plate are sequentially arranged between the base 311 and the top pressure plate 315.

[0029] The dual pressure relief buffer structure 31 also includes a mesh channel plate 312. The mesh channel plate 312 has a first circular hole and a second circular hole in its center. The first and second circular holes are concentric circles, with the radius of the first circular hole being larger than that of the second circular hole. The first circular hole is located near the base 311, and the second circular hole is located near the multi-layer explosion-proof plate. The explosion-proof mesh 313 is disposed within the first circular hole. The design of the mesh channel plate 312 meets the requirements for planar explosion-proof parameters.

[0030] In a preferred embodiment, the dual pressure relief buffer structure 31 also includes a plurality of adjusting pads 316, which are disposed between two adjacent explosion-proof plates. The adjusting pads 316 are made of stainless steel, and the adjustment gap of the adjusting pads 316 is 0.05mm-0.25mm. The adjusting pads 316 are made of high-strength, smooth-surfaced, corrosion-resistant and rust-proof stainless steel. The adjusting pads 316 are used to adjust the explosion-proof gap.

[0031] In a preferred embodiment, the base 311, the explosion-proof mesh 313, the multi-layer explosion-proof plate, and the top pressure plate 315 are connected and fixed by threaded holes; the explosion-proof mesh 313 is a metal wire mesh with uniform porosity and a microporous structure. The multi-layer explosion-proof plate 314, the top pressure plate 315, the adjusting shim 316, and the fastening screws 317 form a narrow explosion-proof space containing multiple planar explosion-proof joint surfaces.

[0032] In a preferred embodiment, the dual pressure relief buffer structure 31 also includes an outer cover 318, with the explosion-proof outer shell 1 fixed to the base 311 by welding. The outer cover 318, together with the explosion-proof mesh 313, the multi-layer explosion-proof plate 314, the top pressure plate 315, the adjusting pad 316, and the fastening screws 317, forms an integral unit and is fixed to the top pressure plate 315. The outer cover 318 can prevent dust, water, and impact, thereby improving safety.

[0033] like Figure 2 As shown, the present invention also provides an explosion-proof and intrinsically safe power supply box with a dual pressure relief and buffer structure, specifically including: an electrical cavity 2, a battery cavity 3, and a wiring cavity 4 are provided inside the explosion-proof housing 1; the electrical cavity 2 and the wiring cavity 4 are arranged side by side above the battery cavity 3; the dual pressure relief and buffer device is set at a preset position in the explosion-proof housing 1, the preset position being located on the side wall of the battery cavity 3; the battery cavity 3 provides backup power for the components in the electrical cavity 2, and the wiring cavity 4 is for connecting external AC power and for signal and power output, the connection and power output of the external power need to be processed by the components in the electrical cavity 2.

[0034] In this invention, the operation of the explosion-proof and intrinsically safe power supply box with a dual pressure relief buffer structure 31 is as follows:

[0035] The dual pressure relief buffer structure 31 ensures that when an explosion occurs in the battery cavity 3 inside the explosion-proof housing, the explosive gas, under pressure, causes the flame carrying enormous heat energy to accumulate at the pressure relief buffer structure under instantaneous high pressure. The flame is blocked by the high-density microporous high-strength metal wire mesh explosion-proof net 313, and a portion of the heat energy is released. The heat energy then passes through the narrow explosion-proof space containing multiple planar explosion-proof joint surfaces, formed by multiple explosion-proof plates 314, a top pressure plate 315, adjusting pads 316, and fastening screws 317. Under pressure, the heat energy is released again through the gaps between the multiple plates. After being buffered by the protective outer cover 318, it reaches the explosive environment where the equipment is used. This eliminates the safety hazard of an explosion in the external explosive environment caused by an explosion inside the equipment, greatly improving the safety of equipment, personnel, and the environment, and providing reliable protection for safe production.

[0036] This invention, by sequentially arranging an explosion-proof mesh 313 and multiple explosion-proof plates 314 between the base 311 and the top pressure plate 315, allows explosive gas to pass through the explosion-proof mesh 313 under pressure. The explosion-proof mesh 313 blocks the flame and releases some heat energy, thereby achieving the effect of pressure relief. After the explosive gas is buffered by the explosion-proof mesh 313, the airflow passes through the narrow explosion-proof cavity composed of multiple explosion-proof plates 314, and then releases pressure again through the multi-layer explosion-proof joint surface, achieving a safer state. This reduces the production cost of the pressure relief device, lowers safety hazards, and makes the equipment safer and more reliable.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0038] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A dual pressure relief buffer structure, characterized in that, The dual pressure relief buffer structure specifically includes: a base, an explosion-proof mesh, multiple explosion-proof plates, and a top pressure plate; The explosion-proof mesh and the multiple layers of explosion-proof panels are sequentially arranged between the base and the top pressure plate; The dual pressure relief buffer structure also includes a mesh groove plate, in which a first circular hole and a second circular hole are provided in the middle. The first circular hole and the second circular hole are concentric circles. The radius of the first circular hole is larger than the radius of the second circular hole. The first circular hole is close to the base, and the second circular hole is close to the multi-layer explosion-proof plate. The explosion-proof mesh is disposed in the first circular hole. The dual pressure relief buffer structure also includes multiple adjusting pads, which are disposed between two adjacent explosion-proof plates; the adjusting pads are used to adjust the explosion-proof gap; the adjusting pads are made of high-strength, smooth-surfaced, corrosion-resistant and rust-proof stainless steel; the adjustment gap of the adjusting pads is 0.05mm-0.25mm; The base, the explosion-proof mesh, the multi-layer explosion-proof plates, and the top pressure plate are connected and fixed by threaded holes; the multi-layer explosion-proof plates, the top pressure plate, the adjusting pads, and the fastening screws form a narrow explosion-proof space containing multiple planar explosion-proof joint surfaces.

2. The dual pressure relief buffer structure according to claim 1, characterized in that, The explosion-proof mesh is a metal wire mesh with uniform porosity and a microporous structure.

3. The dual pressure relief buffer structure according to claim 1, characterized in that, The dual pressure relief buffer structure also includes an outer cover, and the explosion-proof outer shell is fixed to the base by welding.

4. An explosion-proof and intrinsically safe power supply box with a dual pressure relief and buffer structure, characterized in that, The power supply box specifically includes: an explosion-proof shell and a dual pressure relief buffer structure as described in any one of claims 1-3; The explosion-proof enclosure is provided with an electrical cavity, a battery cavity, and a wiring cavity; The electrical cavity and the wiring cavity are arranged side by side above the battery cavity; The dual pressure relief buffer device is located at a preset position on the explosion-proof housing, and the preset position is located on the side wall of the battery cavity.

Images