Flame-proof arc lighting and switchgear

Abstract

This invention discloses an arc-resistant lighting lamp and a switch cabinet, relating to the field of switch cabinet lighting technology. The arc-resistant lighting lamp features a double-sleeve structure comprising an inner arc-resistant sleeve and an outer arc-resistant sleeve fitted over the inner sleeve. The outer sleeve passes through an external metal partition. An installation space is formed within the inner sleeve, and an installation opening is formed on the outer sleeve corresponding to the installation space, connecting the outside world to the installation space. The lighting assembly includes a lamp wick and a transparent lampshade. The transparent lampshade is installed at the installation opening and seals it. The lamp wick is installed in the installation space and positioned close to the transparent lampshade. A clamping ring is fitted over the outer sleeve, which protrudes outward to form a first abutment platform. The first abutment platform and the clamping ring are located on opposite sides of the external metal partition, and the first abutment platform and the clamping ring cooperate to clamp the external metal partition. The arc-resistant lighting lamp provided by this invention offers good safety, maintainability, and reliability, exhibiting excellent overall performance.

Description

Technical Field

[0001] This invention relates to the field of switch cabinet lighting technology, and particularly to an anti-arc lighting lamp and a switch cabinet. Background Technology

[0002] To meet the needs of switchgear maintenance, lighting is required inside the switchgear. Currently, the installation of these lights is complex, and when they fail, disassembly and reassembly are difficult, making it hard for maintenance personnel to replace them efficiently, resulting in poor maintainability. Furthermore, when a circuit breaks in the lighting, arcing can easily occur, potentially damaging the light and injuring maintenance personnel, leading to poor reliability and safety. Summary of the Invention

[0003] The main objective of this invention is to provide an arc-resistant lighting lamp and switch cabinet, addressing the technical problems of poor safety, maintainability, and reliability of lighting lamps in current switch cabinets.

[0004] To achieve the above objectives, the present invention proposes an arc-resistant lighting lamp, which includes: The double-layer sleeve structure includes an inner sleeve for fire prevention arc and an outer sleeve for fire prevention arc that is sleeved outside the inner sleeve. The outer sleeve for fire prevention arc passes through an external metal partition. An installation space is formed inside the inner sleeve for fire prevention arc. The outer sleeve for fire prevention arc forms an installation port that connects the outside world with the installation space at the position corresponding to the installation space. The lighting assembly includes a lamp core and a transparent lamp cover. The transparent lamp cover is installed at the mounting opening and seals the mounting opening. The lamp core is installed in the mounting space and positioned close to the transparent lamp cover. The power cord of the lamp core is led out from the mounting space to the outside. A clamping ring is fitted over the outer sleeve of the flame-retardant arc-proof outer sleeve. The flame-retardant arc-proof outer sleeve protrudes outward to form a first abutment platform. The first abutment platform and the clamping ring are respectively located on both sides of the outer metal partition, and the first abutment platform and the clamping ring cooperate to clamp the outer metal partition.

[0005] In one embodiment, a first abutment is located at the end of the outer sleeve of the fire-resistant arc sleeve away from the installation port, and a second abutment is formed on the side of the inner sleeve of the fire-resistant arc sleeve away from the installation port. The second abutment extends out of the outer sleeve of the fire-resistant arc sleeve, and the end of the first abutment facing away from the installation port abuts against the second abutment. A clamping ring is threadedly engaged with the outer sleeve of the fire-resistant arc sleeve, and the end of the first abutment facing the installation port engages with the clamping ring to clamp the external metal partition. The power cord passes through the second abutment and is led out to the outside.

[0006] In one embodiment, the end of the inner sleeve of the fire-resistant arc sleeve near the installation port is the light-transmitting end. The light-transmitting end is located inside the outer sleeve of the fire-resistant arc sleeve and forms a light-transmitting opening. The light-transmitting opening is directly opposite the installation port. The transparent lampshade is snapped into the installation port and abuts against the light-transmitting end.

[0007] In one embodiment, the transparent lampshade is a spherical transparent lampshade. The portion of the sphere facing the first abutment extends into the installation space through the light-transmitting opening, while the portion of the sphere facing away from the first abutment extends out of the flame-retardant outer sleeve through the installation opening.

[0008] In one embodiment, the bottom end of the fire-resistant arc inner sleeve is formed with a first annular abutment surface, which is inclined from the outside to the inside toward the first abutment platform, and the spherical transparent lampshade abuts against the first annular abutment surface.

[0009] In one embodiment, the inner wall of the flame-retardant outer sleeve has a second annular abutment surface formed at the installation opening. The second annular abutment surface is inclined from the inside to the outside toward the second abutment platform, and the spherical transparent lampshade abuts against the second annular abutment surface.

[0010] In one embodiment, a gasket assembly is also fitted around the outer periphery of the flame-retardant arc-resistant outer sleeve. The clamping ring and the gasket assembly are respectively located on both sides of the outer metal partition, and the gasket assembly is used to abut against the outer metal partition.

[0011] In one embodiment, the washer assembly includes an elastic washer and a flat washer. The clamping ring and the elastic washer are respectively disposed on both sides of the outer metal partition. The elastic washer is used to abut against the outer metal partition, and the flat washer is disposed between the elastic washer and the first abutment platform.

[0012] In one embodiment, the inner sleeve, the outer sleeve, and the threaded sleeve are all metal sleeves; And / or, the transparent lampshade is a glass transparent lampshade.

[0013] The present invention also proposes a switch cabinet, which includes an instrument compartment, a circuit breaker compartment, and the aforementioned anti-arc lighting. A metal partition is provided between the circuit breaker compartment and the instrument compartment. An anti-arc sleeve is inserted through the metal partition. A clamping ring and a mounting port are located in the circuit breaker compartment, and a first abutment platform is located in the instrument compartment. The clamping ring and the first abutment platform cooperate to clamp the metal partition. The technical solution of this invention employs a structure that uses a transparent lampshade installed at the mounting opening to seal it, the lamp wick installed within the mounting space, and a first abutment platform that engages with a clamping ring to clamp the external metal partition. This allows the entire lighting fixture to be easily installed on or removed from the external metal partition. When the lighting fixture is damaged, maintenance personnel can efficiently replace it, improving maintainability. The double-layer sleeve structure, consisting of an arc-resistant inner sleeve and an arc-resistant outer sleeve, offers higher structural reliability and provides double protection. When the lamp wick experiences a short circuit and arcing, this double-layer sleeve structure can better withstand the high temperature of the arc, effectively preventing the arc from burning through the double-layer sleeve structure. This high reliability further prevents injury to maintenance personnel from damage caused by the arc-resistant lighting fixture, ensuring high safety. Furthermore, the transparent lampshade at the mounting opening effectively blocks the arc from escaping, preventing injury to maintenance personnel from the ejected arc, further enhancing safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the anti-arc lighting lamp provided by the present invention; Figure 2 This is a cross-sectional schematic diagram of an embodiment of the anti-arc lighting lamp provided by the present invention.

[0016] Explanation of icon numbers: 100. Flame-resistant arc-resistant lighting lamp; 10. Double-layer sleeve structure; 11. Flame-resistant arc-resistant inner sleeve; 111. Installation space; 112. Second abutment platform; 113. First annular abutment surface; 114. Light-transmitting end; 115. Light-transmitting opening; 12. Flame-resistant arc-resistant outer sleeve; 121. Installation port; 122. First abutment platform; 123. Second annular abutment surface; 20. Lighting component; 21. Lamp wick; 22. Transparent lampshade; 23. Power cord; 30. Clamping ring; 40. Washer assembly; 41. Elastic washer; 42. Flat washer; 200. External metal partition.

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0020] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0021] To meet the needs of switchgear maintenance, lighting is required inside the switchgear. Currently, the installation of these lights is complex, and when they fail, disassembly and reassembly are difficult, making it hard for maintenance personnel to replace them efficiently, resulting in poor maintainability. Furthermore, when a circuit breaks in the lighting, arcing can easily occur, potentially damaging the light and injuring maintenance personnel, leading to poor reliability and safety.

[0022] This invention proposes an anti-arc lighting lamp 100.

[0023] Please see Figures 1 to 2In one embodiment of the present invention, the fire-resistant arc lighting lamp 100 includes a double-layer sleeve structure 10, a lighting component 20, and a clamping ring 30; wherein, the double-layer sleeve structure 10 includes a fire-resistant arc inner sleeve 11 and a fire-resistant arc outer sleeve 12 sleeved outside the fire-resistant arc inner sleeve, the fire-resistant arc outer sleeve 12 passing through an external metal partition 200, an installation space 111 is formed inside the fire-resistant arc inner sleeve 11, and an installation opening 121 is formed on the fire-resistant arc outer sleeve 12 corresponding to the installation space 111, connecting the outside world with the installation space 111; the lighting component 20 includes a lamp wick 21 and a transparent... A lampshade 22, a transparent lampshade 22, is installed at the mounting opening 121 and seals the mounting opening 121. A lamp wick 21 is installed in the mounting space 111 and is positioned close to the transparent lampshade 22. The power cord 23 of the lamp wick 21 is led out from the mounting space 111 to the outside. A clamping ring 30 is sleeved on the outside of the flame-retardant arc-resistant outer sleeve 12. The flame-retardant arc-resistant outer sleeve 12 protrudes outward to form a first abutment platform 122. The first abutment platform 122 and the clamping ring 30 are respectively located on both sides of the external metal partition 200, and the first abutment platform 122 and the clamping ring 30 cooperate to clamp the external metal partition 200.

[0024] The double-layer sleeve structure 10 for arc-resistant lighting provided by the present invention includes an inner arc-resistant sleeve 11 and an outer arc-resistant sleeve 12 sleeved outside the inner arc-resistant sleeve 11. The outer arc-resistant sleeve 12 passes through an external metal partition 200. An installation space 111 is formed inside the inner arc-resistant sleeve 11. The outer arc-resistant sleeve 12 forms an installation port 121 corresponding to the installation space 111, connecting the outside world with the installation space 111. The lighting assembly 20 includes a lamp wick 21 and a transparent lampshade 22. The transparent lampshade 22 is installed at the installation port 121 and seals the installation port 121. The lamp wick 21 is installed in the installation space 111 and positioned close to the transparent lampshade 22. The power cord 23 of the lamp wick 21 is led out from the installation space 111 to the outside world. The clamping ring 30 is sleeved on the outside of the fire-resistant arc outer sleeve 12. The fire-resistant arc outer sleeve 12 protrudes outward to form a first abutting platform 122. The first abutting platform 122 and the clamping ring 30 are respectively located on both sides of the outer metal partition 200, and the first abutting platform 122 and the clamping ring 30 cooperate to clamp the outer metal partition 200.

[0025] This invention employs a structure where a transparent lampshade 22 is installed at the mounting opening 121 and seals the opening; the lamp wick 21 is installed within the mounting space 111; and the first abutment platform 122, in conjunction with the clamping ring 30, clamps the external metal partition 200. This allows the entire lighting fixture to be easily installed on or removed from the external metal partition 200. When the lighting fixture is damaged, maintenance personnel can efficiently replace it, improving maintainability. The double-layer sleeve structure 10, composed of an arc-resistant inner sleeve 11 and an arc-resistant outer sleeve 12, offers higher structural reliability and provides double protection. When the lamp wick 21 experiences a short circuit and arc, the double-layer sleeve structure 10 can better withstand the high temperature of the arc, effectively preventing the arc from burning through the double-layer sleeve structure 10. This high reliability further prevents injury to maintenance personnel due to damage to the arc-resistant lighting fixture 100, ensuring high safety. Furthermore, the transparent lampshade 22 installed at the mounting port 121 can effectively block the arc from being ejected from the mounting port 121, thereby preventing the ejected arc from causing harm to maintenance personnel and ensuring higher safety.

[0026] In one embodiment of the present invention, a first abutment platform 122 is distributed at one end of the anti-arc outer sleeve 12 away from the mounting port 121, and a second abutment platform 112 is formed at one end of the anti-arc inner sleeve 11 away from the mounting port 121. The second abutment platform 112 extends out of the anti-arc outer sleeve 12, and the end of the first abutment platform 122 away from the mounting port 121 abuts against the second abutment platform 112. The clamping ring 30 is threadedly engaged with the anti-arc outer sleeve 12, and the side of the first abutment platform 122 facing the mounting port 121 cooperates with the clamping ring 30 to clamp the external metal partition 200. The power cord 23 passes through the second abutment platform 112 and is led out to the outside.

[0027] Specifically, the first abutment platform 122 is located at the end of the arc-resistant outer sleeve 12 away from the mounting opening 121, and the end of the arc-resistant inner sleeve 11 away from the mounting opening 121 forms the second abutment platform 112. The second abutment platform 112 extends out of the arc-resistant outer sleeve 12. The end of the first abutment platform 122 away from the mounting opening 121 abuts against the second abutment platform 112. The clamping ring 30 is threadedly engaged with the arc-resistant outer sleeve 12. The end of the first abutment platform 122 facing the mounting opening 121 engages with the clamping ring 30 to clamp the outer metal partition 200. By abutting the end of the first abutment platform 122 away from the mounting opening 121 against the second abutment platform 112, the relative position between the arc-resistant inner sleeve 11 and the arc-resistant outer sleeve 12 is fixed, further improving the structural reliability of the arc-resistant lighting lamp 100. Furthermore, the threaded fit between the anti-arc outer sleeve 12 and the anti-arc inner sleeve 11 allows for easy assembly of the anti-arc outer sleeve 12 and the anti-arc inner sleeve 11. This simple and convenient assembly facilitates the disassembly of the anti-arc outer sleeve 12 and the anti-arc inner sleeve 11 to repair or replace the lamp wick 21 within the installation space 111, resulting in higher maintainability.

[0028] In one embodiment of the present invention, the end of the fire-resistant arc inner sleeve 11 near the mounting port 121 is a light-transmitting end 114. The light-transmitting end 114 is located inside the fire-resistant arc outer sleeve 12 and forms a light-transmitting opening 115. The light-transmitting opening 115 is directly opposite to the mounting port 121. The transparent lampshade 22 is snapped into the mounting port 121 and abuts against the light-transmitting end 114.

[0029] Specifically, the end of the inner sleeve 11 near the mounting port 121 is a light-transmitting end 114. The light-transmitting end 114 extends into the outer sleeve 12 of the flame-resistant arc extinguishing sleeve and forms a light-transmitting opening 115. The light-transmitting opening 115 is directly opposite the mounting port 121, so that the light emitted by the lamp wick 21 can pass through the light-transmitting opening 115 and the mounting port 121 in sequence to illuminate outwards, making the light transmission path more direct, reducing light loss, and improving the lighting effect. The transparent lampshade 22 is abutted against the light-transmitting end 114, so that the transparent lampshade 22 provides a limiting and sealing effect on the light-transmitting end 114, further enhancing the sealing of the installation space 111, preventing dust and moisture from entering, and improving reliability.

[0030] In one embodiment of the present invention, the transparent lampshade 22 is a spherical transparent lampshade 22. The part of the spherical transparent lampshade 22 facing the first abutment platform 122 extends into the installation space 111 through the light-transmitting opening 115, and the part of the spherical transparent lampshade 22 facing away from the first abutment platform 122 extends out of the flame-retardant arc outer sleeve 12 through the installation opening 121.

[0031] Specifically, the portion of the spherical transparent lampshade 22 facing the first contact platform 122 extends through the mounting opening 121 to the outside of the flame-retardant outer sleeve 12, causing the light-emitting portion of the spherical transparent lampshade 22 to protrude beyond the flame-retardant outer sleeve 12, thus expanding the illumination range and angle and improving the lighting effect. Furthermore, the spherical transparent lampshade 22 passes through both the light-transmitting opening 115 and the mounting opening 121, resulting in a double-limited installation that is more stable, less prone to loosening or displacement, and improved reliability.

[0032] In one embodiment of the present invention, a first annular abutment surface 113 is formed at the bottom end of the fire-resistant arc inner sleeve 11. The first annular abutment surface 113 is inclined from the outside to the inside toward the first abutment platform 122, and the spherical transparent lampshade 22 abuts against the first annular abutment surface 113.

[0033] Specifically, the first annular abutment surface 113 formed at the bottom end of the fire-resistant arc inner sleeve 11 is inclined upward from the outside to the inside. By setting the inclined first annular abutment surface 113, the shape of the spherical transparent lampshade 22 can be better matched, so that the spherical transparent lampshade 22 can be more tightly pressed against the first annular abutment surface 113. This allows the spherical transparent lampshade 22 to be installed more stably and reliably inside the fire-resistant arc outer sleeve 12, making it less prone to shaking. Furthermore, it can further improve the sealing effect of the spherical transparent lampshade 22 on the light-transmitting opening 115.

[0034] In one embodiment of the present invention, the inner wall of the flame-retardant outer sleeve 12 is provided with a second annular abutment surface 123 at the mounting port 121. The second annular abutment surface 123 is inclined from the inside to the outside toward the second abutment platform 112, and the spherical transparent lampshade 22 abuts against the second annular abutment surface 123.

[0035] Specifically, the inner wall of the flame-retardant outer sleeve 12 has a second annular abutment surface 123 at the mounting opening 121. The second annular abutment surface 123 is inclined upward from the inside to the outside. The spherical transparent lampshade 22 abuts against the second annular abutment surface 123. The inclined second annular abutment surface 123 can better match the shape of the spherical transparent lampshade 22. The first annular abutment surface 113 and the second annular abutment surface 123 clamp the spherical transparent lampshade 22 from the light-transmitting opening 115 and the mounting opening 121, respectively, making the installation of the spherical transparent lampshade 22 more stable, less prone to loosening or displacement, and improving reliability.

[0036] In one embodiment of the present invention, a gasket assembly 40 is also provided on the outer periphery of the flame-retardant outer sleeve 12. The clamping ring 30 and the gasket assembly 40 are respectively disposed on both sides of the outer metal partition 200, and the gasket assembly 40 is used to abut against the outer metal partition 200.

[0037] Specifically, a washer assembly 40 is sleeved on the outer periphery of the flame-retardant arc-resistant outer sleeve 12. The clamping ring 30 and the washer assembly 40 are respectively located on both sides of the outer metal partition 200. The washer assembly 40 is used to abut against the outer metal partition 200, so that the washer assembly 40 forms a buffer between the clamping ring 30 and the outer metal partition 200. When the clamping ring 30 is tightened, the washer assembly 40 can evenly distribute the load, avoiding local stress concentration caused by direct contact between the clamping ring 30 and the outer metal partition 200, thus improving the reliability of installation.

[0038] In one embodiment of the present invention, the washer assembly 40 includes an elastic washer 41 and a flat washer 42. The clamping ring 30 and the elastic washer 41 are respectively disposed on both sides of the outer metal partition 200. The elastic washer 41 is used to abut against the outer metal partition 200, and the flat washer 42 is disposed between the elastic washer 41 and the first abutment platform 122.

[0039] Furthermore, the washer assembly 40 includes an elastic washer 41 and a flat washer 42, which cooperate with each other. The flat washer 42 can increase the contact area with the external metal partition 200, disperse the pressure, and prevent the surface of the external metal partition 200 from being crushed or deformed. The elastic washer 41 provides a continuous elastic preload, making the clamping more secure and reliable, and improving the clamping reliability.

[0040] In one embodiment of the present invention, the inner sleeve, outer sleeve, and threaded sleeve are all metal sleeves. Using metal sleeves for the inner sleeve, outer sleeve, and threaded sleeve gives the double-layer sleeve structure 10 higher mechanical strength and high-temperature resistance. When the lamp wick 21 experiences an open circuit and arcing, the metal sleeve can better withstand the high temperature and impact of the arc, is less prone to deformation or damage, and effectively prevents the arc from spreading outward, improving safety and reliability. Simultaneously, the metal sleeve has excellent heat dissipation performance, quickly conducting and dissipating heat to avoid localized overheating and extend the lifespan of the lighting fixture. Furthermore, the metal sleeve can contact and conduct with the external metal partition 200, serving as a grounding function. When leakage or short circuit occurs inside the lighting fixture, the current can be conducted through the metal sleeve to the external metal partition 200, and then grounded through the external metal partition 200, preventing electric shock to maintenance personnel and preventing the generation of short-circuit arcs, further improving safety.

[0041] In one embodiment of the present invention, the transparent lampshade 22 is a glass transparent lampshade 22. The glass transparent lampshade 22 is easy to clean; during maintenance, a simple wipe is sufficient to restore its light transmission performance, thus improving maintainability. Furthermore, the glass transparent lampshade 22 can withstand high temperatures without easily melting or deforming, effectively preventing arcing and enhancing safety.

[0042] This invention also proposes a switch cabinet, which includes an instrument compartment, a circuit breaker compartment, and an arc-resistant lighting lamp 100. A metal partition is provided between the circuit breaker compartment and the instrument compartment. An arc-resistant outer sleeve 12 passes through the metal partition. A clamping ring 30 and a mounting port 121 are located in the circuit breaker compartment, and a first abutment platform 122 is located in the instrument compartment. The clamping ring 30 and the first abutment platform 122 cooperate to clamp the metal partition. The specific structure of the arc-resistant lighting lamp 100 is as described in the above embodiments. Since this switch cabinet adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0043] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. An arc-resistant lighting lamp, characterized in that, The arc-resistant lighting lamp includes: A double-layer sleeve structure, comprising an inner sleeve for fire prevention arc and an outer sleeve for fire prevention arc, wherein the outer sleeve for fire prevention arc is inserted through an external metal partition, an installation space is formed inside the inner sleeve for fire prevention arc, and an installation port is formed on the outer sleeve for fire prevention arc corresponding to the position of the installation space, connecting the outside world with the installation space. A lighting assembly, comprising a lamp wick and a transparent lampshade, wherein the transparent lampshade is installed at the mounting opening and seals the mounting opening, the lamp wick is installed in the mounting space and positioned close to the transparent lampshade, and the power cord of the lamp wick is led out from the mounting space to the outside. A clamping ring is sleeved on the outer sleeve of the flame-retardant arc-resistant outer sleeve. The flame-retardant arc-resistant outer sleeve protrudes outward to form a first abutment platform. The first abutment platform and the clamping ring are respectively disposed on both sides of the outer metal partition, and the first abutment platform and the clamping ring cooperate to clamp the outer metal partition.

2. The arc-resistant lighting lamp as described in claim 1, characterized in that, The first abutment is located at the end of the fire-resistant arc sleeve away from the mounting port. The end of the fire-resistant arc inner sleeve away from the mounting port forms a second abutment. The second abutment extends out of the fire-resistant arc outer sleeve. The end of the first abutment away from the mounting port abuts against the second abutment. The clamping ring is threaded into the fire-resistant arc outer sleeve. The side of the first abutment facing the mounting port cooperates with the clamping ring to clamp the external metal partition. The power cord passes through the second abutment and is led out to the outside.

3. The arc-resistant lighting lamp as described in claim 2, characterized in that, The end of the inner sleeve of the fire-resistant arc sleeve near the mounting port is a light-transmitting end. The light-transmitting end is located inside the outer sleeve of the fire-resistant arc sleeve and forms a light-transmitting opening. The light-transmitting opening is directly opposite the mounting port. The transparent lampshade is snapped into the mounting port and abuts against the light-transmitting end.

4. The arc-resistant lighting lamp as described in claim 3, characterized in that, The transparent lampshade is a spherical transparent lampshade. The portion of the spherical transparent lampshade facing the first abutment platform extends into the installation space through the light-transmitting opening, while the portion of the spherical transparent lampshade facing away from the first abutment platform extends out of the flame-retardant arc-proof outer sleeve through the installation opening.

5. The arc-resistant lighting lamp as described in claim 4, characterized in that, The bottom end of the fire-resistant arc inner sleeve has a first annular abutment surface, which is inclined from the outside to the inside toward the first abutment platform. The spherical transparent lampshade abuts against the first annular abutment surface.

6. The arc-resistant lighting lamp as described in claim 5, characterized in that, The inner wall of the flame-retardant outer sleeve has a second annular abutment surface formed at the installation opening. The second annular abutment surface is inclined from the inside to the outside toward the second abutment platform, and the spherical transparent lampshade abuts against the second annular abutment surface.

7. The arc-resistant lighting lamp as described in any one of claims 1 to 6, characterized in that, The outer periphery of the flame-retardant arc sleeve is also fitted with a washer assembly. The clamping ring and the washer assembly are respectively disposed on both sides of the outer metal partition. The washer assembly is used to abut against the outer metal partition.

8. The arc-resistant lighting lamp as described in claim 7, characterized in that, The washer assembly includes an elastic washer and a flat washer. The clamping ring and the elastic washer are respectively disposed on both sides of the outer metal partition. The elastic washer is used to abut against the outer metal partition, and the flat washer is disposed between the elastic washer and the first abutment platform.

9. The arc-resistant lighting lamp as described in any one of claims 1 to 6, characterized in that, The inner sleeve, the outer sleeve, and the threaded sleeve are all metal sleeves; And / or, the transparent lampshade is a glass transparent lampshade.

10. A switch cabinet, characterized in that, The switch cabinet includes an instrument compartment, a circuit breaker compartment, and an arc-resistant lighting fixture as described in any one of claims 1 to 9. A metal partition is provided between the circuit breaker compartment and the instrument compartment. The arc-resistant outer sleeve passes through the metal partition. The clamping ring and the mounting port are located in the circuit breaker compartment. The first abutment is located in the instrument compartment. The clamping ring and the first abutment cooperate to clamp the metal partition.

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