Lightweight explosion-proof lamp

Abstract

The utility model relates to the field of anti-explosion lighting equipment, in particular to an anti-explosion lamp which comprises a rear shell, a light-transmitting plate and a fixing shell, one side of the rear shell is open, a light-emitting element is arranged on the open side of the rear shell, the light-transmitting plate seals the light-emitting element in the rear shell, and the fixing shell fixes the light-transmitting plate on the rear shell. The middle of the open side of the rear shell is provided with a containing groove for installing a light-emitting element and an installation face around the containing groove, the installation face is provided with an annular glue injection groove, the installation face of the rear shell is provided with an annular inner protrusion and an annular outer protrusion, and the glue injection groove is formed between the inner protrusion and the outer protrusion; the edge of the light-transmitting plate is aligned with the glue injection groove, and a sealant is arranged in the glue injection groove to seal a gap between the mounting surface and the inner surface of the light-transmitting plate; the fixing shell is annular and detachably fixed to the rear shell, the edge of the fixing shell is pressed on the outer edge of the outer surface of the light-transmitting plate, and the light-transmitting plate is tightly pressed on the mounting face of the rear shell through the fixing shell. In this way, the same sealing effect can be achieved through smaller pre-tightening force.

Description

Technical Field

[0001] The utility model relates to the field of explosion-proof lighting equipment, and particularly relates to a lightweight explosion-proof lamp. Background Art

[0002] An explosion-proof lamp is a special lighting device, commonly used in scenarios such as dust or chemical plants where deflagration and explosion accidents are likely to occur. The electrical components and light-emitting components of the explosion-proof lamp are sealed, and when it is working normally and when the explosion-proof lamp is switched on and off, it will not ignite or detonate the surrounding dust and combustible gases.

[0003] The outer shell of the explosion-proof lamp is generally made of aluminum metal. Cast aluminum itself has high structural strength and excellent elastic deformation ability, and it is one of the ideal materials for manufacturing explosion-proof lamps. However, the light-emitting component of the explosion-proof lamp is arranged inside, and a transparent light-transmitting plate is needed to transmit the light inside. The light-transmitting plate is generally made of high-strength glass or transparent resin material.

[0004] Due to the inherent characteristics of the light-transmitting plate material, the light-transmitting plate generally shows brittleness and hardness. The light-transmitting plate and the metal outer shell of the explosion-proof lamp cannot be connected too tightly. If the initial stress of the light-transmitting plate is too large after installation, during the subsequent working process, due to the heating of the electrical components, the different thermal expansion coefficients of the metal shell and the light-transmitting plate may cause stress concentration and squeeze the light-transmitting plate, and finally the light-transmitting plate breaks.

[0005] In the past, to overcome the above problems, a thicker light-transmitting plate was simply used to improve the strength of the light-transmitting plate. However, this would result in a lower light transmittance and a greater weight. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the problems of poor sealing and excessive weight of the light-transmitting plate of the explosion-proof lamp, and to provide an explosion-proof lamp, which includes a rear shell, a light-transmitting plate and a fixing shell. One side of the rear shell is open, the light-emitting component is arranged on the open side of the rear shell, the light-transmitting plate seals the light-emitting component in the rear shell, and the fixing shell fixes the light-transmitting plate on the rear shell.

[0007] In the middle of the open side of the rear shell, there is a receiving groove for installing the light-emitting component, and an installation surface around the receiving groove. The installation surface is provided with an annular glue injection groove. The installation surface of the rear shell is provided with an annular inner protrusion and an outer protrusion, and a glue injection groove is formed between the inner protrusion and the outer protrusion; the edge of the light-transmitting plate is aligned with the glue injection groove, and a sealing glue is arranged in the glue injection groove to seal the gap between the installation surface and the inner surface of the light-transmitting plate.

[0008] The fixing shell is annular, the fixing shell is detachably fixed on the rear shell, the edge of the fixing shell presses on the outer edge of the outer surface of the light-transmitting plate, and the fixing shell presses the light-transmitting plate tightly on the installation surface of the rear shell.

[0009] Preferably, the top of the inner protrusion is in close contact with the inner surface of the light-transmitting plate.

[0010] Preferably, the joint surface between the top of the inner protrusion and the light-transmitting plate is a ground surface.

[0011] Preferably, the contour of the outer protrusion is larger than that of the light-transmitting plate, and a gap is left between the outer edge of the outer protrusion and the light-transmitting plate for the sealant to ooze out.

[0012] Preferably, the heights of the outer protrusion and the inner protrusion are flush.

[0013] Preferably, the rear shell is provided with positioning blocks, the positioning blocks are wedge-shaped, and the outer edge of the light-transmitting plate abuts against the inclined surface of the positioning blocks.

[0014] Preferably, a plurality of the positioning blocks are arranged at intervals along the circumferential surface of the light-transmitting plate.

[0015] Preferably, the inner edge of the fixed shell presses tightly against the outer surface of the light-transmitting plate, and the inner edge of the fixed shell faces the inner protrusion.

[0016] Applying the above technical solutions of the present utility model to an explosion-proof lamp, the following effects are achieved: What actually needs to be sealed in the explosion-proof lamp are the electrical components and the light-emitting components inside the explosion-proof lamp. These components that need to be powered on may generate electric sparks during the connection, disconnection, and operation processes. In order to prevent these electric sparks from igniting the surrounding flammable gases, explosion-proof-level sealing is required.

[0017] Specifically in the explosion-proof lamp of the present application, the electrical components and the square tube components are actually enclosed in the cavity formed by the rear shell and the light-transmitting plate. The part that needs to be sealed is the joint surface between the light-transmitting plate and the rear shell. In fact, there is also the lead-out wire part of the cable. However, this application does not involve the sealing method of this part, and there are also mature solutions in the prior art. Therefore, this application will no longer describe the lead-out wire part.

[0018] In the present application, the following settings are made for the joint surface between the light-transmitting plate and the rear shell. First, an annular inner protrusion and an outer protrusion are provided on the rear shell. The inner protrusion and the outer protrusion are concentrically arranged, and a groove, that is, a glue injection groove, is formed between the inner protrusion and the outer protrusion. The sealant is arranged in the glue injection groove to increase the usage amount and thickness of the sealant. The thick sealant in the glue injection groove serves as a buffer between the light-transmitting plate and the rear shell, reducing the stress concentration on the light-transmitting plate caused by the different thermal expansion coefficients of the rear shell and the light-transmitting plate, and preventing the light-transmitting plate from being broken.

[0019] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the overall appearance of the present utility model;

[0021] Figure 2 is a three-dimensional view of the rear shell and the glue injection groove part of the present utility model;

[0022] Figure 3 is a half-sectional view of the internal structure;

[0023] Figure 4 is Figure 3 an enlarged view of the portion A in

[0024] Description of the reference numerals

[0025] 1 - Rear shell, 2 - Fixed shell, 3 - Light-transmitting plate, 4 - Light-emitting element, 5 - Glue injection groove, 5a - Inner protrusion, 5b - Outer protrusion, 6 - Positioning block. Detailed implementation manners

[0026] The following provides a detailed description of the specific implementation manners of the present utility model. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0027] In the present utility model, unless otherwise stated, the orientation terms such as "upper" and "lower" generally refer to the orientation in the assembled and used state. "Inner" and "outer" refer to the inner and outer of the contour of each component itself.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present utility model described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] In the present utility model, an explosion-proof lamp is provided, which includes a rear shell 1, a light-transmitting plate 3 and a fixed shell 2. One side of the rear shell 1 is open. The light-emitting element 4 is arranged on the open side of the rear shell 1. The light-transmitting plate 3 seals the light-emitting element 4 in the rear shell 1, and the fixed shell 2 fixes the light-transmitting plate 3 on the rear shell 1. As Figure 1 shown, generally, the rear shell 1 of the explosion-proof lamp is made of cast aluminum alloy, and the rear shell 1 is in the shape of a flared opening as a whole. The rear shell 1 is provided with heat dissipation fins for auxiliary heat dissipation. A cavity for installing electrical components is also formed in the rear shell 1, and then glue injection and sealing are carried out. Preferably, as shown in the appendix Figure 3, the rear case 1 is divided into two parts. The two independent parts jointly enclose to form a cavity, and electrical components, circuit boards and other devices are arranged in the cavity, and then are connected to the light-emitting element 4 through wire holes. The light-emitting element 4 is generally an LED light source. Multiple independent LED light sources are combined on a circuit board to form a lamp panel.

[0030] The light-transmitting plate 3 will cover the opening of the horn of the rear case 1 and seal the light-emitting element 4 inside. The function of the fixing case 2 is to fix the light-transmitting plate 3. In the traditional technical solution, to make the combination of the light-transmitting plate 3 and the rear case 1 closer, the fixing case 2 needs to adopt a relatively large pressing stress. The light-transmitting plate 3 needs to be designed thicker to cope with the relatively large pressing stress.

[0031] In the present application, the middle of the open side of the rear case 1 has a receiving groove for installing the light-emitting element 4 and an installation surface around the receiving groove. The installation surface is provided with an annular glue injection groove 5. The installation surface of the rear case 1 is provided with an annular inner protrusion 5a and an outer protrusion 5b. A glue injection groove 5 is formed between the inner protrusion 5a and the outer protrusion 5b; the edge of the light-transmitting plate 3 is aligned with the glue injection groove 5, and a sealant is arranged in the glue injection groove 5 to seal the gap between the installation surface and the inner surface of the light-transmitting plate 3.

[0032] The fixing case 2 is annular, the fixing case 2 is detachably fixed on the rear case 1, the edge of the fixing case 2 presses on the outer edge of the outer surface of the light-transmitting plate 3, and the fixing case 2 presses the light-transmitting plate 3 on the installation surface of the rear case 1.

[0033] Specifically, the top of the inner protrusion 5a is in close contact with the inner surface of the light-transmitting plate 3. However, it does not require the relatively large pre-tightening pressure in the prior art, and only needs to place the light-transmitting plate 3 on the inner protrusion 5a. The sealing is mainly achieved by the sealant in the glue injection groove 5. And during installation, the glue injection groove 5 can be used to hold the sealant, and then the light-transmitting plate 3 is pressed on the sealant. It is convenient for installation operations. The joint surface between the top of the inner protrusion 5a and the light-transmitting plate 3 is a grinding surface. After grinding, the top of the inner protrusion 5a is flatter and higher, which is beneficial to the fit with the light-transmitting plate 3.

[0034] The contour of the outer protrusion 5b is larger than that of the light-transmitting plate 3, and a gap is left between the outer protrusion 5b and the outer edge of the light-transmitting plate 3 for the sealant to ooze out. Therefore, the top of the outer protrusion 5b does not need additional processing after casting, and the outer protrusion 5b and the inner protrusion 5a are of the same height. After the light-transmitting plate 3 is pressed on the sealant, the excess sealant oozes out from the outer protrusion 5b and the edge of the light-transmitting plate 3.

[0035] The rear shell 1 is provided with positioning blocks 6. The positioning blocks 6 are wedge-shaped, and the outer edge of the light-transmitting plate 3 abuts against the inclined surface of the positioning blocks 6. The function of the positioning blocks 6 is to assist in positioning the light-transmitting plate 3 at the correct position when installing the light-transmitting plate 3. A plurality of positioning blocks 6 are arranged at intervals along the circumferential surface of the light-transmitting plate 3. Specifically, the positioning blocks 6 are directly integrally formed on the rear shell 1, and three positioning blocks 6 are arranged around the rear shell 1.

[0036] The inner edge of the fixed shell 2 presses against the outer surface of the light-transmitting plate 3, and the inner edge of the fixed shell 2 faces the inner protrusion 5a.

[0037] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0038] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0039] In addition, any combination can be made between different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A lightweight explosion-proof lamp, comprising a rear housing (1), a light-transmitting plate (3) and a fixing housing (2). One side of the rear housing (1) is open, a light-emitting element (4) is arranged on the open side of the rear housing (1), the light-transmitting plate (3) seals the light-emitting element (4) inside the rear housing (1), and the fixing housing (2) fixes the light-transmitting plate (3) on the rear housing (1). It is characterized in that in the middle of the open side of the rear housing (1), there is a receiving groove for installing the light-emitting element (4) and an installation surface around the receiving groove. An annular sealant injection groove (5) is provided on the installation surface. An annular inner protrusion (5a) and an outer protrusion (5b) are provided on the installation surface of the rear housing (1). A sealant injection groove (5) is formed between the inner protrusion (5a) and the outer protrusion (5b); the edge of the light-transmitting plate (3) is aligned with the sealant injection groove (5), and a sealant is provided in the sealant injection groove (5) to seal the gap between the installation surface and the inner surface of the light-transmitting plate (3); the fixing housing (2) is annular, the fixing housing (2) is detachably fixed on the rear housing (1), the edge of the fixing housing (2) presses on the outer edge of the outer surface of the light-transmitting plate (3), and the fixing housing (2) presses the light-transmitting plate (3) against the installation surface of the rear housing (1).

2. The lightweight explosion-proof lamp according to claim 1, wherein The top of the inner protrusion (5a) is in close contact with the inner surface of the light-transmitting plate (3).

3. The lightweight explosion-proof lamp according to claim 2, characterized in that, The fitting surface between the top of the inner protrusion (5a) and the light-transmitting plate (3) is a ground surface.

4. The lightweight explosion-proof lamp according to claim 1, characterized in that, The contour of the outer protrusion (5b) is larger than that of the light-transmitting plate (3), and a gap is left between the outer protrusion (5b) and the outer edge of the light-transmitting plate (3) for the sealant to ooze out.

5. The lightweight explosion-proof lamp according to claim 1, wherein, The heights of the outer protrusion (5b) and the inner protrusion (5a) are flush.

6. The lightweight explosion-proof lamp according to claim 1, characterized in that, The rear housing (1) is provided with positioning blocks (6), the positioning blocks (6) are wedge-shaped, and the outer edge of the light-transmitting plate (3) abuts against the inclined surface of the positioning blocks (6).

7. The lightweight explosion-proof lamp according to claim 6, wherein, A plurality of the positioning blocks (6) are arranged at intervals along the circumferential surface of the light-transmitting plate (3).

8. The lightweight explosion-proof lamp according to claim 1, characterized in that, The inner edge of the fixing housing (2) presses tightly against the outer surface of the light-transmitting plate (3), and the inner edge of the fixing housing (2) is opposite to the inner protrusion (5a).

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