Protective device for explosion-proof lamp

Abstract

The application relates to a protection device of an explosion-proof lamp, which comprises an upper shell and a first guardrail fixed on the upper shell, the inner side of the first guardrail is provided with a second guardrail, the second guardrail is rotationally connected with the upper shell; in an original state, the second guardrail coincides with the first guardrail; when the temperature reaches a predetermined state, the second guardrail can rotate by a certain angle relative to the first guardrail. The protection device of the explosion-proof lamp provided by the application is used when a light source is installed inside the second guardrail; when the temperature reaches the predetermined state, the second guardrail can rotate by a certain angle relative to the first guardrail, and the size of the hole of the guardrail is reduced in cooperation with the first guardrail, so that the broken fragments are not easy to fall through the protection rail.

Description

[0001] The original application number of the divisional application is 202110570847.3, the application date is May 25, 2021, and the invention name is "protective device of explosion-proof lamp". TECHNICAL FIELD

[0002] The present application belongs to the technical field of lighting device accessories, and particularly relates to a protective device of explosion-proof lamp. BACKGROUND

[0003] With the enhancement of people's safety awareness, protective devices are generally arranged on general explosion-proof lamps. The existing protective devices generally have two types. One is a closed protective cover, and the other is an open protective fence. The closed protective cover has poor heat dissipation performance, and the open protective fence has good heat dissipation performance. However, once the explosion-proof lamp is broken, the broken fragments may fall through the protective fence, which poses a safety hazard. SUMMARY

[0004] In view of the problems existing in the prior art, the present application provides a protective device of explosion-proof lamp to solve the above technical problems.

[0005] In order to achieve the above-mentioned purposes, the technical scheme provided by the present application is as follows:

[0006] A protective device of explosion-proof lamp, comprising an upper shell and a first guardrail fixed to the upper shell, an inner side of the first guardrail is provided with a second guardrail, and the second guardrail is rotationally connected with the upper shell; in the original state, the second guardrail coincides with the first guardrail; when the temperature reaches a predetermined state, the second guardrail can rotate by a certain angle relative to the first guardrail.

[0007] Preferably, a circular groove is arranged on the upper shell, a blocking body, a sliding block and a spring are arranged in the groove, one end of the spring is connected with the blocking body, and the other end is connected with the sliding block; the top end of the second guardrail is connected with the sliding block, pin holes are arranged on the first guardrail and the second guardrail, an electric telescopic device is arranged on the upper shell, a pin cooperating with the pin hole is installed on the electric telescopic device, and a temperature control device is arranged on the upper shell; in the original state, the spring is in a compressed state, and the pin is inserted into the pin hole; when the temperature reaches a predetermined state, the temperature detection device controls the electric telescopic device to extend or retract, so that the second guardrail is separated from the limitation of the pin.

[0008] Preferably, the electric telescopic device is an electric telescopic rod, and the temperature control device is a temperature controller.

[0009] Preferably, a mounting hole is arranged on the upper shell, and a mounting plate for mounting a light source is detachably connected to the mounting hole.

[0010] Preferably, a non-woven fabric is provided between the first guardrail and the second guardrail.

[0011] Preferably, the blocking body, slider, and spring are all provided in multiples, and are arranged in a one-to-one correspondence.

[0012] Preferably, the upper housing has a circular groove, within which a stop, a slider, and a spring are disposed. One end of the spring is connected to the stop, and the other end is connected to the slider. The top of the second guardrail is connected to the slider. Both the first and second guardrails have pin holes, with pins fitting into the pin holes. An elastic sheet is installed on the upper housing or the first guardrail, located outside the first guardrail and abutting against the pin. A fixing ring is installed on the upper housing, and an annular airbag is fitted onto the fixing ring. In the initial state, the spring is compressed, and the pin is inserted into the pin hole. When the temperature reaches a predetermined level, the airbag expands due to heat, lifting the pin and causing the second guardrail to disengage from its restraint.

[0013] Preferably, the thickness of the airbag at the position corresponding to the pin is less than the thickness at other positions of the airbag.

[0014] Preferably, the airbag has a cylindrical protrusion at the position corresponding to the pin, the diameter of the cylindrical protrusion is smaller than the diameter of the pin, and the thickness of the side of the cylindrical protrusion near the pin is smaller than the thickness of other positions of the airbag.

[0015] Preferably, a non-woven fabric is provided between the first guardrail and the second guardrail.

[0016] The explosion-proof lamp protective device provided by the present invention has a light source installed inside the second guardrail. When the temperature reaches a predetermined state, the second guardrail can rotate at a certain angle relative to the first guardrail, which, in conjunction with the first guardrail, reduces the size of the hole in the guardrail, making it less likely for broken fragments to pass through the guardrail and fall down. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of the protective device for the explosion-proof lamp of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of an upper shell according to the present invention;

[0019] Figure 3 This is a second schematic diagram of the structure of the protective device for the explosion-proof lamp of the present invention;

[0020] Figure 4 for Figure 3 One of the schematic diagrams of the annular airbag structure in the image;

[0021] Figure 5 for Figure 3 Figure 2 is a structural schematic diagram of the annular air bag in the second embodiment of the present application;

[0022] In the figure, reference numerals; housing 1, first guardrail 2, second guardrail 3, blocking body 4, sliding block 5, spring 6, electric telescopic device 7, pin 8, temperature control device 9, mounting plate 10, lamp port 11, elastic sheet 12, fixing ring 13, annular air bag 14, cylindrical protrusion 15. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present application more clear and understandable, the present application will be further described below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0024] Embodiment 1, the present application provides a protective device for explosion-proof lamp, referring to Figure 1 and Figure 2 , comprising an upper housing 1 and a first guardrail 2 fixed on the upper housing, the inner side of the first guardrail is provided with a second guardrail 3, and the second guardrail is rotationally connected with the upper housing; a circular groove is arranged on the upper housing, and a blocking body 4, a sliding block 5 and a spring 6 are arranged in the groove, one end of the spring is connected with the blocking body, and the other end is connected with the sliding block, wherein the blocking body, the sliding block and the spring are generally arranged in multiple and one-to-one correspondence; the top end of the second guardrail is connected with the sliding block, pin holes are arranged on the first guardrail and the second guardrail, an electric telescopic device 7 is arranged on the upper housing, a pin 8 matched with the pin hole is mounted on the electric telescopic device, and a temperature control device 9 is arranged on the upper housing, in this embodiment, the electric telescopic device is an electric telescopic rod, and the temperature control device is a temperature controller; in the original state, the spring is in a compressed state, and the pin is inserted into the pin hole; when the internal temperature of the second guardrail reaches a predetermined state, the temperature detection device controls the electric telescopic device to extend and retract, so that the second guardrail is separated from the limitation of the pin, and of course at this time the temperature control device can also control the explosion-proof lamp to be closed to prevent the explosion-proof lamp from being damaged.

[0025] The protective device of the explosion-proof lamp is used to install the light source inside the second guardrail, when the temperature reaches the predetermined state, the temperature detecting device controls the electric telescopic device to extend and retract, so that the second guardrail is separated from the limitation of the pin, the spring is restored, the sliding block is moved in the groove, and the second guardrail is rotated at an angle relative to the first guardrail, and the size of the hole of the guardrail is reduced in cooperation with the first guardrail, so that the broken fragments are not easy to fall through the protective fence. As an embodiment, the non-woven fabric is arranged between the first guardrail and the second guardrail, so that the non-woven fabric can cover the hole of the first guardrail after the second guardrail is rotated, so that the broken fragments cannot fall through the protective fence, and the safety hazard of glass fragments falling is eliminated.

[0026] In the embodiment, in order to facilitate installation of the light source, the applicant also designs as follows: the upper shell is provided with a mounting hole, and a mounting plate 10 for installing the light source is detachably connected to the mounting hole, and a lamp port 11 is mounted on the mounting plate, so as to facilitate installation of the bulb. When manufacturing, the mounting hole is manufactured to be slightly larger than the diameter of the to-be-installed bulb.

[0027] In the embodiment, in order to facilitate installation of the light source, the applicant also designs as follows: the upper shell is provided with a mounting hole, and a mounting plate 10 for installing the light source is detachably connected to the mounting hole, and a lamp port 11 is mounted on the mounting plate, so as to facilitate installation of the bulb. When manufacturing, the mounting hole is manufactured to be slightly larger than the diameter of the to-be-installed bulb. Figure 2 Figure 3 The protective device of the explosion-proof lamp is used to install the light source inside the second guardrail, when the temperature reaches the predetermined state, the temperature detecting device controls the electric telescopic device to extend and retract, so that the second guardrail is separated from the limitation of the pin, the spring is restored, the sliding block is moved in the groove, and the second guardrail is rotated at an angle relative to the first guardrail, and the size of the hole of the guardrail is reduced in cooperation with the first guardrail, so that the broken fragments are not easy to fall through the protective fence. As an embodiment, the non-woven fabric is arranged between the first guardrail and the second guardrail, so that the non-woven fabric can cover the hole of the first guardrail after the second guardrail is rotated, so that the broken fragments cannot fall through the protective fence, and the safety hazard of glass fragments falling is eliminated.

[0028] ​The protective device of the explosion-proof lamp described above, in use, installs the light source inside the second guardrail, the heat generated by the light source during use diffuses outward, once the temperature inside the explosion-proof lamp rises rapidly due to external environmental interference, the gas in the annular air bag expands due to heat, when the temperature inside the second guardrail reaches a predetermined state, the annular air bag expands to lift the pin, so that the second guardrail is released from the restriction of the pin, in this way, the spring recovers, pushes the sliding block to move in the groove, so that the second guardrail rotates a certain angle relative to the first guardrail, cooperates with the first guardrail to reduce the size of the hole of the guardrail, so that the broken fragments are not easy to fall through the protective fence, as an embodiment, non-woven fabric is arranged between the first guardrail and the second guardrail, in this way, after the second guardrail rotates, the non-woven fabric can cover the hole of the first guardrail, so that the broken fragments cannot fall through the protective fence, eliminating the safety hazard of glass fragments falling.

[0029] As a preferred solution, referring to Figure 4 , the thickness of the air bag corresponding to the position of the pin is smaller than the thickness of the air bag at other positions, in this way, when the air bag expands, the part of the air bag corresponding to the position of the pin deforms relatively quickly, part of it can enter the pin hole to lift the pin, and under the action of the rotating force, the part is crushed and broken, the instantaneous force acts on the pin, which is more likely to push the pin away, and the gas in the air bag quickly spreads, forming a disturbance to the air inside the protective fence, accelerating the heat exchange of the gas inside the protective fence, which is beneficial to protect the light source.

[0030] As a more preferred structure, referring to Figure 5 , the air bag corresponding to the position of the pin is provided with a cylindrical protrusion 15, the diameter of the cylindrical protrusion is slightly smaller than the diameter of the pin, and the thickness of the side of the cylindrical protrusion close to the pin is smaller than the thickness of the air bag at other positions, in this way, when the air bag expands, the side of the cylindrical protrusion close to the pin deforms relatively quickly, part of it can enter the pin hole to lift the pin, and under the action of the rotating force, the part is crushed and broken, the instantaneous force acts on the pin, which is more likely to push the pin away, and the gas in the air bag quickly spreads, forming a disturbance to the air inside the protective fence, accelerating the heat exchange of the gas inside the protective fence, which is beneficial to protect the light source. As a variation, the thickness of the cylindrical protrusion can also be set to be smaller than the thickness of the air bag at other positions, in this way, the cylindrical protrusion deforms more easily, so that more parts enter the pin hole to lift the pin.

[0031] It should be noted that the embodiment and embodiment 2 can also be used in combination, mainly using the temperature control structure of embodiment 1 to make the second guardrail disengage from the restriction of the pin, and the air bag only plays an auxiliary role. The air bag mainly acts on the instant breakage to make the air in the guardrail quickly dissipate heat. This structure is especially suitable for the case where non-woven fabric is arranged between the first guardrail and the second guardrail.

[0032] The above-described embodiments only express the implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as the limitation of the patent scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A protection device for explosion-proof lamp, comprising an upper shell (1) and a first guardrail (2) fixed on the upper shell, characterized in that, an inner side of the first guardrail is provided with a second guardrail (3), which is rotationally connected with the upper shell; in the original state, the second guardrail coincides with the first guardrail; when the temperature reaches a predetermined state, the second guardrail can rotate a certain angle relative to the first guardrail; a circular recess is provided on the upper shell, and a blocking body (4), a sliding block (5) and a spring (6) are provided in the recess, one end of the spring is connected with the blocking body, and the other end is connected with the sliding block; a top end of the second guardrail is connected with the sliding block, pin holes are provided on the first guardrail and the second guardrail, and a pin (8) matched with the pin holes is provided in the pin holes; an elastic sheet (12) is installed on the upper shell or the first guardrail, which is located on the outer side of the first guardrail and abuts against the pin; a fixing ring (13) is installed on the upper shell, and an annular air bag (14) is sleeved on the fixing ring; in the original state, the spring is in a compressed state, and the pin is inserted into the pin hole; when the temperature reaches a predetermined state, the air bag can be expanded after being heated, so as to lift the pin, so that the second guardrail is separated from the limitation of the pin.

2. A protective device for an explosion-proof lamp according to claim 1, characterized in that The thickness of the air bag corresponding to the position of the pin is less than the thickness of other positions of the air bag.

3. A protective device for an explosion-proof lamp according to claim 1, characterized in that A cylindrical protrusion (15) is provided at the position of the pin of the air bag, the diameter of the cylindrical protrusion is less than the diameter of the pin, and the thickness of one side of the cylindrical protrusion close to the pin is less than the thickness of other positions of the air bag.

4. A protective device for an explosion-proof lamp according to claim 2 or 3, characterised in that Non-woven fabric is provided between the first guardrail and the second guardrail.

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