An explosion-proof lamp

Abstract

An explosion-proof lamp comprises a light source assembly and a power supply assembly which are independent of each other, the power supply assembly is fixedly arranged at the rear side of the light source assembly, and the power supply assembly comprises a power supply cavity, a wiring cavity and a wiring channel. The power supply cavity has a reference surface m1 arranged in a horizontal direction. The wiring channel has an included angle a1 between a central axis l1 and the reference surface m1. The wiring cavity has oppositely arranged first and second edges. The first edge is flush with the upper edge of the power supply cavity and has a first height. The second edge is lower than the highest point o1 of the through hole of the wiring channel and has a second height. The end surface of the wiring channel is located on the same side of the first edge. The height difference between the first height and the second height forms a relief space. When the through hole of the wiring channel is processed, the tool is prevented from colliding with or interfering with the edge of the wiring cavity, thereby simplifying the processing operation, improving the processing precision and efficiency, and without the need to additionally increase the size of the cavity.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, specifically to an explosion-proof lamp. Background Technology

[0002] With societal development, people are paying close attention to their safety while vigorously developing the economy. Strict requirements exist for fire prevention, explosion protection, impact resistance, and waterproofing in the production processes of petroleum, chemical, mining, and oil and gas stations. All types of lighting fixtures used in these harsh conditions involving flammable and explosive materials, vibration, and impact must be equipped with robust safety protection measures. With the development of LED technology, LED lighting products have been widely used in industrial fields, such as in very large coal sheds and squares containing hazardous gases, where high-power explosion-proof lighting fixtures are required.

[0003] Explosion-proof lighting fixtures are indispensable in explosive atmosphere production in industrial and mining enterprises. Currently, existing explosion-proof lighting fixtures generally adopt a split structure, with the light source cavity and power supply cavity separate. However, the power supply cavity typically lacks a dedicated wiring cavity. If a separate wiring cavity is provided, the power supply cavity and wiring cavity of the explosion-proof lamp need to be connected through a wiring channel for power cable connection. However, machining this wiring channel (especially threaded holes) requires the use of tapping tools. Due to unreasonable edge height design of the wiring cavity, the tapping tool easily interferes with the sidewall or edge of the wiring cavity when entering the wiring channel, leading to machining difficulties, low machining accuracy, or even failure to complete tapping. To avoid tool interference, it is often necessary to increase the cavity size or change the angle of the wiring channel, resulting in a larger overall size of the explosion-proof lamp and increased material costs. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an explosion-proof lamp.

[0005] To achieve the above objectives, the present invention provides the following technical solution: An explosion-proof light includes an independent light source assembly and a power supply assembly. The power supply assembly is fixedly disposed at the rear side of the light source assembly. The power supply assembly includes: The power supply chamber has a reference surface m1 set horizontally; Wiring chamber; The wiring channel connects the wiring chamber and the power supply chamber. An angle α1 exists between the central axis l1 of the wiring channel and the reference plane m1. The wiring chamber has a first edge and a second edge that are arranged opposite to each other. The first edge is flush with the upper edge of the power supply chamber and has a first height. The second edge is lower than the highest point o1 of the through hole of the wiring channel and has a second height. The end face of the wiring channel is located on the same side of the first edge. The height difference between the first height and the second height forms a clearance space.

[0006] The power supply chamber is equipped with a first cover plate that mates with it.

[0007] The opening of the power supply chamber is provided with a first glue-filling groove in the circumferential direction, and the first cover plate is provided with a first protrusion in the circumferential direction that is embedded in the first glue-filling groove.

[0008] There is a gap between the first protrusion and the inner wall of the first glue-filling groove for filling with sealant.

[0009] The height of the inner wall of the first glue-filling tank is lower than the height of the outer wall.

[0010] The outer wall of the first glue-filling tank is provided with an indicator groove, and the bottom of the indicator groove is provided with an indicator protrusion.

[0011] The wiring chamber is equipped with a second cover plate that mates with it.

[0012] The wiring chamber is provided with a second glue-filling groove in the circumference, and the second cover plate is provided with a second protrusion embedded in the second glue-filling groove in the circumference.

[0013] The wiring chamber has wiring holes on both sides, and the light source assembly has multiple splicing holes.

[0014] The explosion-proof lights are multiple and can be spliced ​​together. Adjacent explosion-proof lights are spliced ​​together through their respective wiring holes and splicing holes.

[0015] The beneficial effects of this invention are as follows: By setting the first edge of the wiring chamber to a first height flush with the upper edge of the power supply chamber, and setting the second edge to a second height lower than the highest point of the through hole in the wiring channel, a significant height difference is created between the first and second heights. This height difference provides ample clearance for the workpiece during the machining of the through hole in the wiring channel (e.g., tapping), avoiding collisions or interference between the tool and the edge of the wiring chamber, thereby simplifying the machining operation, improving machining accuracy and efficiency, and eliminating the need to increase the cavity size. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is the front view of the present invention.

[0018] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0019] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0020] Figure 5 for Figure 3 Enlarged diagram of point B in the middle.

[0021] Figure 6 This is a schematic diagram of the structure of this utility model (cover plate omitted).

[0022] Figure 7 for Figure 6 Enlarged diagram of point C in the middle.

[0023] Figure 8 This is a schematic diagram of the assembled structure of this utility model. Detailed Implementation

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

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain a specific posture (as shown in the attached figure).

[0026] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides an explosion-proof lamp, which mainly includes a light source assembly 100 and a power supply assembly 200 that are independently arranged. This split design is beneficial for heat isolation and dissipation, and facilitates independent maintenance and replacement.

[0027] The power supply assembly 200 is fixedly connected to the rear side (i.e., the side opposite to the light-emitting surface) of the light source assembly 100 by bolts or other fasteners. To ensure the explosion-proof safety of the electrical connection, a metal connector is provided between the light source assembly 100 and the power supply assembly 200. This metal connector has a through hole, through which the internal wires of the light source assembly 100 pass into the interior of the power supply assembly 200, thereby achieving an electrical connection.

[0028] The power supply assembly 200 is configured as a multi-chamber structure, specifically including a power supply chamber 210 and a wiring chamber 220.

[0029] The power supply chamber 210 houses core electrical components such as the power drive circuit board for the explosion-proof lamp. To facilitate the description of the relative positions of the components, the power supply chamber 210 is defined to have a horizontally extending reference plane m1 (e.g., ...). Figure 3 (As shown by the dashed line).

[0030] The wiring chamber 220 is used to introduce external power supply cables and connect the cables to internal conductors. To achieve safe and compact wiring, this embodiment designs a wiring channel 250. This wiring channel 250 connects the wiring chamber 220 and the power supply chamber 210, allowing conductors from the wiring chamber 220 to enter the power supply chamber 210 through this channel.

[0031] like Figure 3 and Figure 4 As shown, the wiring channel 250 has a central axis l1. This central axis l1 is not horizontal or vertical, but forms an angle α1 with the reference plane m1 of the aforementioned power supply chamber 210. In a preferred embodiment, the angle α1 ranges from 15° to 75°, for example, it can be 30°. By setting this tilt angle, the wiring channel 250 is no longer a simple vertical or horizontal channel. After the wiring channel 250 is formed by casting or machining, the inner wall (or end threaded hole) of the channel needs to be tapped to install explosion-proof sealing connectors or metal conduits. If the wiring channel 250 is perpendicular to the reference plane m1 or parallel to the chamber wall, the feed direction of the tapping tool (such as a tap) will be blocked by the edge of the wiring chamber 220, making it impossible to complete the tapping operation. By setting the channel to an angle, the tapping tool can smoothly extend along the axis l1, avoiding the solid structure of the chamber.

[0032] Furthermore, in order to achieve interference-free feeding and retraction of the tapping tool, the wiring chamber 220 has a first edge 222 and a second edge 221 that are arranged opposite to each other.

[0033] The first edge 222 is flush with the upper edge 212 of the power supply chamber 210 and has a first height; The second edge 221 is lower than the highest point o1 of the through hole of the trace channel 250, and has a second height, such as Figure 4 As shown, there is a height difference h1 between the upper end face of the second edge 221 and the highest point o1 of the through hole. This height difference h1 is just enough to ensure that when the tapping tool taps the trace channel and withdraws, it will not interfere with its withdrawal path. Furthermore, the end face of the wiring channel 250 (i.e. its opening on the wiring chamber 220 side) is located on the same side of the first edge 222.

[0034] Since the height of the second edge 221 is significantly lower than the highest point o1 of the trace channel 250, such as Figure 3 and Figure 4 As shown, the first edge 222 remains at a higher position, thus creating a clearance space between the first height and the second height. The geometric significance of this clearance space is that when tapping along the central axis l1 of the wiring channel 250, the rear end of the tool or the operating handle can freely enter this clearance space without being obstructed by the second edge 221. Simultaneously, since the end face of the wiring channel 250 is located on the same side as the first edge 222 (i.e., the higher side), the tapping tool can enter from above or to the side of the wiring chamber 220 at an angle, while the lower side (the side of the second edge 221) provides space for tool retraction and chip removal. This significantly reduces machining difficulty; the tapping tool can feed directly along the axis l1 without the need for customized extended or irregularly shaped tools, avoiding interference between the tool and the chamber edge, improving machining efficiency and yield. Because the clearance space allows the tool to completely penetrate the wiring channel 250, a complete and uniform internal thread can be obtained, ensuring the explosion-proof performance and sealing reliability when subsequently installing sealing joints. This structure does not sacrifice the effective volume of the wiring chamber 220, allowing operators to still perform wiring work normally; at the same time, the inclined channel also reduces the risk of wire bending damage.

[0035] like Figure 5 As shown, the power supply chamber 210 is provided with a first cover plate 230 that cooperates with it. The first cover plate 230 is used to close the opening of the power supply chamber 210 to protect the internal electrical components.

[0036] A first potting groove 211 is provided around the opening of the power supply chamber 210. Correspondingly, a downwardly protruding first protrusion 231 is provided around the first cover plate 230 (i.e., at the position corresponding to the first potting groove 211). When the first cover plate 230 is installed on the power supply chamber 210, the first protrusion 231 is precisely embedded inside the first potting groove 211.

[0037] The first protrusion 231 is not tightly fitted to the inner wall 213 of the first potting groove 211; rather, there is a certain gap. This gap is used to fill the sealant (such as epoxy resin or silicone potting compound) during assembly. By leaving this gap, it is ensured that the sealant can be evenly distributed and fill the space between the protrusion and the groove wall, thereby forming a continuous, bubble-free sealing layer, effectively preventing moisture, dust, and explosive gases from seeping into the power supply chamber 210 along the edge of the cover plate. The inner, top, and outer surfaces of the first protrusion 231 can also bond with the sealant, so the above arrangement helps to increase the area of ​​contact with the sealant and enhance the bonding effect.

[0038] The height of the inner wall 213 (i.e., the wall near the inside of the power supply chamber 210) of the first potting groove 211 is set to be lower than the height of its outer wall 214 (i.e., the wall away from the inside of the power supply chamber 210), that is, there is a height difference h2 between the two. Figure 5 As shown, the outer wall 214 is higher, acting as a "dam" to effectively limit the sealant from overflowing outwards (i.e., away from the power supply chamber 210), ensuring the sealant is confined within the potting area and thus guaranteeing sufficient sealant to form a complete seal. Even after the protrusion 231 is fully embedded, the outer wall 214 still covers the outer side of the sealant layer, forming a higher and more reliable sealing barrier. Excess sealant will not overflow from the outer wall 214 (because the outer wall is higher), but will preferentially slide over the inner wall 213 into the power supply chamber 210 due to the lower inner wall 213. This prevents sealant leakage and contamination of the external environment.

[0039] like Figure 7 As shown, the indicator groove 215 is recessed downwards from the top surface of the outer wall 214, and its specific position can be set in the middle or near the top of the outer wall 214 according to design requirements. At the bottom of the indicator groove 215, an indicator protrusion 216 is further provided. This indicator protrusion 216 can be a small protrusion integrally cast with the outer wall 214, or it can be an embedded marker with a conspicuous color (such as red).

[0040] When the operator injects sealant into the first dispensing tank 211, the liquid level of the sealant can be directly observed through the indicator tank 215. When the liquid level reaches the bottom of the indicator tank 215 (i.e., just touching or submerging the indicator protrusion 216), it indicates that the recommended dispensing volume has been reached. At this time, the sealant has not yet overflowed the top of the outer wall 214 and will not leak outwards.

[0041] The inner wall 213 of the first glue-filling tank 211 is lower than the outer wall 214. If the operator accidentally injects too much glue, causing the liquid level to exceed the height indicated by the indicator bump 216, the glue level will be affected.

[0042] The wiring chamber 220 is provided with a second cover plate 240 that cooperates with it. The second cover plate 240 is used to close the opening of the wiring chamber 220 to protect the internal wiring terminals and the connector of the introduced cable, and to meet the explosion-proof requirements.

[0043] A second glue-filling groove 223 is provided around the opening of the wiring chamber 220 (i.e., the entire area along the edge of the opening). The second glue-filling groove 223 can be manufactured in a similar manner to the first glue-filling groove 211 (e.g., casting or machining).

[0044] Accordingly, a second protrusion 241 protruding downwards (or toward the chamber direction) is provided on the circumference of the second cover plate 240 (i.e., at the position corresponding to the second glue-filling groove 223). When the second cover plate 240 is installed on the wiring chamber 220, the second protrusion 241 is precisely embedded inside the second glue-filling groove 223.

[0045] The second protrusion 241 and the second glue-filling groove 223 are fitted with a clearance, meaning there is a predetermined uniform gap between them. During assembly, this gap is filled with sealant (such as epoxy resin or polyurethane sealant). Through the glue-filling process, a continuous glue layer is formed between the second protrusion 241 and the second glue-filling groove 223, thereby improving the explosion-proof rating.

[0046] like Figure 2 and Figure 6 As shown, a wiring hole 224 is provided on each of the opposite sides of the wiring chamber 220 (e.g., the left and right side walls, or the front and rear side walls, depending on the installation direction). This wiring hole 224 penetrates the side wall of the wiring chamber 220 and is used to thread the connecting cable. Each wiring hole 224 preferably has an internal thread or a pre-embedded explosion-proof sealing joint (such as a gland) to achieve an explosion-proof seal after threading.

[0047] The light source assembly 100 is provided with a plurality of splicing holes 110. These splicing holes are arranged through the heat dissipation fins of the light source assembly, and the two are connected by long bolts during assembly.

[0048] like Figure 8 As shown, multiple explosion-proof lights (such as the first explosion-proof light and the second explosion-proof light) can be spliced ​​and combined with each other along a straight line or in an array. Taking two explosion-proof lights spliced ​​side by side as an example, the connection method is as follows: Mechanical connection: Bring the light source assemblies 100 of two adjacent explosion-proof lamps close together, aligning their splicing holes 110 one by one. Then, use bolts, screws, or special connectors to pass through the splicing hole 110 of one explosion-proof lamp and screw them into the corresponding splicing hole 110 of the other explosion-proof lamp (or pass them through both and tighten with a nut), thereby achieving a rigid fixed connection between the two lamp bodies. Multiple explosion-proof lamps can be expanded into a long strip or rectangular lighting array in this manner.

[0049] Electrical Connection: After mechanical fixing, electrical interconnection is required. The operator opens the second cover 240 of the wiring chamber 220 of each explosion-proof lamp, passes one end of a jumper cable through the wiring hole 224 of one of the explosion-proof lamps, and introduces it into its wiring chamber 220, connecting it to the internal terminals. The other end of the cable passes through the corresponding wiring hole 224 of the adjacent explosion-proof lamp, introduces it into that lamp's wiring chamber 220, and connects it to its terminals. In this way, the power lines and / or control lines of multiple explosion-proof lamps are connected in parallel or series. After wiring is completed, the sealing joints at the wiring holes 224 are tightened to ensure explosion-proof performance, and the second cover 240 is reinstalled to complete the sealing.

[0050] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. An explosion-proof lamp, comprising an independent light source assembly (100) and a power supply assembly (200), wherein the power supply assembly (200) is fixedly disposed on the rear side of the light source assembly (100), characterized in that: The power supply assembly (200) includes: The power supply chamber (210) has a reference surface m1 set in the horizontal direction; Wiring chamber (220); A wiring channel (250) connects the wiring chamber (220) and the power supply chamber (210). An angle α1 exists between the central axis l1 of the wiring channel (250) and the reference plane m1. The wiring chamber (220) has a first edge (222) and a second edge (221) arranged opposite to each other. The first edge (222) is flush with the upper edge (212) of the power supply chamber (210) and has a first height. The second edge (221) is lower than the highest point o1 of the through hole of the wiring channel (250) and has a second height. The end face of the wiring channel (250) is located on the same side of the first edge (222). The height difference between the first height and the second height forms a clearance space.

2. The explosion-proof lamp according to claim 1, characterized in that: The power supply chamber (210) is provided with a first cover plate (230) that cooperates with it.

3. The explosion-proof lamp according to claim 2, characterized in that: The opening of the power supply chamber (210) is provided with a first glue-filling groove (211) in the circumferential direction, and the first cover plate (230) is provided with a first protrusion (231) embedded in the first glue-filling groove (211) in the circumferential direction.

4. The explosion-proof lamp according to claim 3, characterized in that: There is a gap between the first protrusion (231) and the inner wall (213) of the first glue-filling groove (211) for filling with sealant.

5. An explosion-proof lamp according to claim 3 or 4, characterized in that: The height of the inner wall (213) of the first glue-filling tank (211) is lower than the height of the outer wall (214).

6. The explosion-proof lamp according to claim 3, characterized in that: The first glue-filling tank (211) has an indicator groove (215) on its outer wall (214), and an indicator protrusion (216) is provided at the bottom of the indicator groove (215).

7. The explosion-proof lamp according to claim 1, characterized in that: The wiring chamber (220) is provided with a second cover plate (240) that cooperates with it.

8. The explosion-proof lamp according to claim 7, characterized in that: The wiring chamber (220) is provided with a second glue-filling groove (223) in the circumferential direction, and the second cover plate (240) is provided with a second protrusion (241) embedded in the second glue-filling groove (223) in the circumferential direction.

9. The explosion-proof lamp according to claim 1, characterized in that: The wiring chamber (220) has wiring holes (224) on its opposite sides, and the light source assembly (100) has multiple splicing holes (110).

10. An explosion-proof lamp according to claim 9, characterized in that: The explosion-proof lights are multiple and can be spliced ​​together. Adjacent explosion-proof lights are spliced ​​together through their respective wiring holes (224) and splicing holes (110).

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