A lamp controller for an explosion-proof luminaire

Abstract

The utility model discloses a lamp control ware of explosion -proof type lamp, relate to lamp control ware of lamp, including the PCB control panel of installing in the bottom of heat -resistant plastic cylinder inside, still include rear cover, the one side fixed setting of rear cover has outer thread cylinder and is located the convex part of outer thread cylinder axial distribution, the end face of convex part is set up with the annular embedding groove of inlaying cooperation of heat -resistant plastic cylinder port. The utility model discloses through the construction independent heat dissipation channel and physical isolation barrier, effectively avoided the direct influence of bulb high temperature to lamp control ware, has guaranteed its stable operation.

Description

Technical Field

[0001] This utility model relates to a lighting controller for lamps, specifically to a lighting controller for an explosion-proof lamp. Background Technology

[0002] Explosion-proof lighting fixtures are mainly used in petroleum, chemical, coal mine, pharmaceutical, military, oil depot, and gas station locations where flammable materials may be present in the air. Ordinary lighting fixtures can become ignition sources during operation (e.g., during switching, generating electrical sparks, or due to excessively high surface temperatures), potentially leading to serious explosions. Explosion-proof lights, through their special design and structure, fundamentally eliminate this risk.

[0003] Referring to the Chinese authorized patent, publication number CN110594647B, publication date 2022-12-13, a new type of explosion-proof lamp is disclosed.

[0004] The drawback of existing technology is that heat accumulation is the primary challenge because the lamps are in operation for extended periods. Furthermore, since the PCB control board is located directly inside the lamp, its operation is inevitably affected by the continuous high-temperature environment. Utility Model Content

[0005] The purpose of this invention is to provide a lighting controller for explosion-proof lighting fixtures to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lamp controller for an explosion-proof lamp, comprising a PCB control board installed on the bottom of the inner side of a heat-resistant plastic cylinder, and a rear cover, wherein an external threaded cylinder and a protrusion located on the axis of the external threaded cylinder are fixedly provided on one side of the rear cover, and an annular embedding groove is provided on the end face of the protrusion to fit into the port of the heat-resistant plastic cylinder.

[0007] Preferably, both the back cover and the protrusion are metal plates.

[0008] Preferably, the lamp holder housing is also included, with the heat-resistant plastic cylinder located inside the lamp holder housing, and the external threaded cylinder being threadedly connected to the threaded hole on the back of the lamp holder housing.

[0009] Preferably, the system also includes a bulb module, which includes a reflector and a lamp holder that is fixedly installed at the narrow end of the reflector. A heat sink is fixedly installed at the bottom of the lamp holder, a rubber gasket is fixedly installed at the wide opening of the reflector, the bulb module is located inside the lamp head housing, and the rubber gasket is in contact with the bottom inner side of the lamp head housing.

[0010] Preferably, the heat sink is fixedly provided with a plurality of equidistantly distributed heat dissipation fins, the bottom of the heat-resistant plastic cylinder is fixedly installed with equidistant springs, and the ends of the equidistant springs are fixedly installed with copper alloy heat sinks that are parallel to the heat sink and can contact the heat dissipation fins, and the copper alloy heat sinks are provided with a plurality of heat dissipation holes.

[0011] Preferably, the circumferential radius of the copper alloy heat sink is the same as the inner radius of the lamp holder housing.

[0012] Preferably, the circumferential radius of the copper alloy heat sink is larger than the circumferential radius of the heat sink plate.

[0013] Preferably, the heat dissipation fins have an X-shaped cross-section.

[0014] Preferably, a ring is fixedly provided on one side of the copper alloy heat sink, and the heat sink plate is distributed within the ring.

[0015] In the above technical solution, the lamp controller for an explosion-proof lamp provided by this utility model has the following beneficial effects: the PCB control board, which is the lamp controller, is installed in a heat-resistant plastic cylinder, and its port is inserted into the embedded groove on the end face of the protrusion of the back cover, thereby realizing the enclosure of the PCB control board. Although the PCB control board is still completely located inside the explosion-proof lamp, it is in a space independent of the lighting-related electronic components. Therefore, the PCB control board will not be affected by the temperature of the lighting-related electronic components during operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 Provided for the embodiments of this utility model Figure 1 A schematic diagram of the exploded structure; Figure 3 Provided for the embodiments of this utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 4 This is a schematic diagram of the bulb module structure provided in an embodiment of the present utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Heat-resistant plastic cylinder; 2. Back cover; 21. External threaded cylinder; 22. Protrusion; 221. Annular embedded groove; 3. Lamp head housing; 41. Reflector cover; 42. Lamp holder; 43. Heat sink plate; 431. Heat dissipation fins; 5. Rubber gasket ring; 6. Equidistant spring; 7. Copper alloy heat sink; 71. Surrounding ring; 72. Heat dissipation holes. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-4 As shown, a lamp controller for an explosion-proof lamp includes a PCB control board installed on the bottom of the inner side of a heat-resistant plastic cylinder 1, and a rear cover 2. An external threaded cylinder 21 and a protrusion 22 located on the axis of the external threaded cylinder 21 are fixedly provided on one side of the rear cover 2. The end face of the protrusion 22 is provided with an annular embedding groove 221 that is fitted into the port of the heat-resistant plastic cylinder 1.

[0021] Specifically, the aforementioned heat-resistant plastic cylinder 1 is cylindrical and made of high-temperature resistant engineering plastics, such as polyetheretherketone (PEEK) or polyimide (PI), to ensure structural stability in high-temperature environments. A PCB control board (not shown in the figure) is fixedly mounted on the inner bottom of the heat-resistant plastic cylinder 1. This PCB control board is used to control the lighting functions of the lamp, such as dimming, switching, or fault detection. The PCB control board is fixed to the bottom of the heat-resistant plastic cylinder 1 with screws or adhesive, and the port of the heat-resistant plastic cylinder 1 is designed to mate with the rear cover 2. Both the rear cover 2 and the protrusion 22 are metal plates.

[0022] In the above technology, when the lamp is working, the heat generated by the bulb module is conducted to the copper alloy heat sink 7 through the heat sink 43 and heat sink fins 431. Simultaneously, the equidistant springs 6 provide continuous pressure to maintain contact between the copper alloy heat sink 7 and the heat sink fins 431, ensuring effective heat transfer. The heat diffuses through the copper alloy heat sink 7 and the heat dissipation holes 72, and is discharged to the outside of the lamp holder housing 3 via the heat conduction holes 23 on the rear cover 2. Because the PCB control board is encased in the heat-resistant plastic cylinder 1, and the heat-resistant plastic cylinder 1 is isolated from the lamp holder housing 3 by the rear cover 2, it is not directly affected by the high temperature of the bulb module, thereby improving the reliability and service life of the PCB control board.

[0023] Furthermore, the back cover 2 is a disc-shaped metal plate, such as aluminum alloy or stainless steel, to provide good thermal conductivity and mechanical strength. An externally threaded cylinder 21 and a protrusion 22 are fixedly provided on one side of the back cover 2 (i.e., the side facing the interior of the lamp holder housing 3). The externally threaded cylinder 21 extends outward from the central area of ​​the back cover 2, and its outer surface is threaded. The protrusion 22 is located at the axial position of the externally threaded cylinder 21, and is cylindrical in shape, with an annular insertion groove 221 on its end face (i.e., the side away from the back cover 2). The size of the annular insertion groove 221 matches the outer edge of the port of the heat-resistant plastic cylinder 1, allowing the port of the heat-resistant plastic cylinder 1 to be inserted into the annular insertion groove 221, forming a tight fit. This fit ensures the fixation between the heat-resistant plastic cylinder 1 and the back cover 2, while completely enclosing the PCB control board inside the heat-resistant plastic cylinder 1, isolating it from the external environment.

[0024] Secondly, the lamp holder housing 3 is made of metal, such as die-cast aluminum, which has explosion-proof and heat dissipation properties. The back of the lamp holder housing 3 (i.e., the side where the back cover 2 is installed) has threaded holes (not shown in the figure). The external threaded cylinder 21 of the back cover 2 is fixed to the threaded hole of the lamp holder housing 3 via a threaded connection, thus installing the back cover 2 onto the lamp holder housing 3. The heat-resistant plastic cylinder 1 is located inside the lamp holder housing 3 and is fixed by the protrusion 22 of the back cover 2. This assembly method allows the PCB control board to be enclosed within the heat-resistant plastic cylinder 1, while other components inside the lamp holder housing 3 (such as the bulb module) are independent of the heat-resistant plastic cylinder 1, preventing the PCB control board from being directly exposed to the heat generated by the lighting elements.

[0025] Furthermore, the bulb module includes a reflector 41, a lamp holder 42, a heat sink 43, and a rubber gasket 5. The reflector 41 is conical or parabolic, with the lamp holder 42 fixedly mounted at its narrow end. The lamp holder 42 is used to mount the bulb (not shown in the figure). The heat sink 43, made of metal such as aluminum, is fixedly mounted at the bottom of the lamp holder 42 to help dissipate heat. The rubber gasket 5, made of high-temperature resistant rubber such as silicone rubber, is fixedly mounted at the wide end of the reflector 41. When the bulb module is installed inside the lamp holder housing 3, the rubber gasket 5 contacts the inner bottom of the lamp holder housing 3, forming a seal and buffer to prevent dust and moisture from entering, while reducing vibration transmission. The wires of the PCB control board are led out from the heat-resistant plastic cylinder 1 and plugged into the interface of the lamp holder 42. The two are connected by a plug-in connection, which is a modular design that facilitates subsequent equipment damage repair and reduces later operating costs.

[0026] Furthermore, the heat dissipation assembly includes heat dissipation fins 431 on the heat dissipation plate 43, equidistant springs 6, and copper alloy heat sinks 7. Multiple equidistant heat dissipation fins 431 are fixedly mounted on the heat dissipation plate 43. The heat dissipation fins 431 have an X-shaped cross-section to increase the heat dissipation surface area and improve heat exchange efficiency. Equidistant springs 6 are fixedly installed at the bottom of the heat-resistant plastic cylinder 1. The equidistant springs 6 are compression springs, and copper alloy heat sinks 7 are fixedly installed at their ends. The copper alloy heat sinks 7 are arranged parallel to the heat dissipation plate 43, and through the elastic force of the equidistant springs 6, the copper alloy heat sinks 7 can maintain contact with the heat dissipation fins 431, thereby forming a heat conduction path. Multiple heat dissipation holes 72 are formed on the copper alloy heat sinks 7, which further promote airflow and enhance heat dissipation.

[0027] In one embodiment, the circumferential radius of the copper alloy heat sink 7 is the same as the inner radius of the lamp holder housing 3, ensuring contact between the copper alloy heat sink 7 and the inner wall of the lamp holder housing 3 and improving heat conduction efficiency. In another embodiment, the circumferential radius of the copper alloy heat sink 7 is larger than the circumferential radius of the heat sink 43, so as to cover a wider heat dissipation area. A surrounding ring 71 is also fixedly provided on one side of the copper alloy heat sink 7. The surrounding ring 71 is an annular flange, and the heat sink 43 is distributed within the surrounding ring 71, thereby restricting the position of the heat sink 43 and ensuring stable contact.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lighting controller for an explosion-proof lighting fixture, characterized in that, The device includes a PCB control board installed on the bottom of the inner side of the heat-resistant plastic cylinder (1), and a rear cover (2). An external threaded cylinder (21) and a protrusion (22) located on the axis of the external threaded cylinder (21) are fixedly provided on one side of the rear cover (2). The end face of the protrusion (22) is provided with an annular embedding groove (221) that is in a mating fit with the port of the heat-resistant plastic cylinder (1).

2. The lighting controller for an explosion-proof lighting fixture according to claim 1, characterized in that, Both the rear cover (2) and the protrusion (22) are metal plates.

3. The lighting controller for an explosion-proof lighting fixture according to claim 1, characterized in that, It also includes a lamp holder housing (3), the heat-resistant plastic cylinder (1) is located inside the lamp holder housing (3), and the external threaded cylinder (21) is threadedly connected to the threaded hole on the back of the lamp holder housing (3).

4. The lighting controller for an explosion-proof lighting fixture according to claim 3, characterized in that, It also includes a bulb module, which includes a reflector (41) and a lamp holder (42) fixedly installed at the narrow end of the reflector (41). A heat sink plate (43) is fixedly installed at the bottom of the lamp holder (42), and a rubber gasket ring (5) is fixedly installed at the wide opening of the reflector (41). The bulb module is located inside the lamp head housing (3), and the rubber gasket ring (5) is in contact with the bottom of the inner side of the lamp head housing (3).

5. The lighting controller for an explosion-proof lighting fixture according to claim 4, characterized in that, The heat sink (43) is fixedly provided with a plurality of equidistant heat dissipation fins (431), and the bottom of the heat-resistant plastic cylinder (1) is fixedly installed with an equidistant spring (6). The end of the equidistant spring (6) is fixedly installed with a copper alloy heat sink (7) that is parallel to the heat sink (43) and can contact the heat dissipation fins (431). The copper alloy heat sink (7) is provided with a plurality of heat dissipation holes (72).

6. The lighting controller for an explosion-proof lighting fixture according to claim 5, characterized in that, The circumferential radius of the copper alloy heat sink (7) is the same as the inner radius of the lamp holder housing (3).

7. The lighting controller for an explosion-proof lighting fixture according to claim 5, characterized in that, The circumferential radius of the copper alloy heat sink (7) is larger than that of the heat sink (43).

8. The lighting controller for an explosion-proof lighting fixture according to claim 5, characterized in that, The heat dissipation fins (431) have an X-shaped cross-section.

9. A lighting controller for an explosion-proof lighting fixture according to claim 5, characterized in that, A ring (71) is fixedly provided on one side of the copper alloy heat sink (7), and the heat sink (43) is distributed inside the ring (71).

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