Explosion-proof solar panel

Abstract

The invention relates to the technical field of solar panels, is specially customized for the industry with inflammable and explosive gas environments and is suitable for being installed and used in an explosion-proof area, and discloses an explosion-proof solar panel which comprises a solar panel body, a junction box is arranged on the solar panel body, a wire is arranged on the junction box, the junction box comprises a box cover and a box body, and a containing groove is formed in the box body. A through hole communicating with the containing groove is formed in the box body, a fire extinguishing bag is arranged in the containing groove, a movable plate is slidably connected to the containing groove, and a movable strip is arranged on the movable plate; when explosion occurs in the junction box, the movable strip extrudes the fire extinguishing bag, and the fire extinguishing bag covers the connection position of the wire through the through hole, if explosion occurs in the junction box, the movable strip in the movable plate can extrude the fire extinguishing bag, so that the fire extinguishing bag can be separated from the through hole, and the fire extinguishing bag can cover the connection position of the wire and the solar panel; conditions such as fire are not easy to occur in the junction box, the influence of explosion in the junction box is reduced, and the explosion-proof performance of the solar panel is improved.

Description

Technical Field

[0001] The present application relates to the technical field of solar panels, and in particular to an explosion-proof solar panel. Background Art

[0002] A solar panel is a device that can convert solar radiation energy directly or indirectly into electrical energy through the photoelectric effect or photochemical effect. Solar panels are usually installed on the roof and connected to equipment through wires to provide power for some equipment. Solar panels are specially customized for industries with flammable and explosive gas environments and are suitable for installation and use in explosion-proof areas.

[0003] In the related art, a solar panel includes a solar panel, a junction box is arranged on the solar panel, a wire is arranged on the junction box, and the wire is connected to the solar panel.

[0004] During the use of solar panels, the wires may short-circuit in the junction box, which may easily cause an explosion. If an explosion occurs, the solar panel will be damaged or even destroyed. Therefore, the explosion-proof performance of the solar panel is insufficient. Summary of the invention

[0005] In order to improve the problem of insufficient explosion-proof performance of solar panels, the present application provides an explosion-proof solar panel.

[0006] The present application provides an explosion-proof solar panel, which adopts the following technical solution: An explosion-proof solar panel comprises a solar panel, a junction box is arranged on the solar panel, a wire is arranged on the junction box, the junction box comprises a box cover and a box body, a receiving groove is arranged on the box body, a through hole connected to the receiving groove is arranged on the box body, a fire extinguishing bag is arranged in the receiving groove, a movable plate is slidably connected to the receiving groove, and a movable bar is arranged on the movable plate; when an explosion occurs in the junction box, the movable bar squeezes the fire extinguishing bag, and the fire extinguishing bag covers the wire connection through the through hole.

[0007] By adopting the above technical solution, if an explosion occurs in the junction box, the impact force generated by the explosion will drive the movable plate to move, so that the movable strip in the movable plate can squeeze the fire extinguishing bag, so that the fire extinguishing bag can be detached from the through hole, so that the fire extinguishing bag can cover the connection between the wire and the solar panel, making it difficult for fire to occur inside the junction box, reducing the impact of the explosion in the junction box, increasing the explosion-proof performance of the solar panel, and then the explosion of the junction box will not burn the solar panel, reducing the damage to the solar panel.

[0008] Optionally, a limit strip is slidably connected to the box body, a stop block is slidably connected to the box body, the stop block is located on the sliding path of the limit strip, and a stop groove for inserting the stop block is provided on the box cover; when the stop block is located in the stop groove, the box cover is fixed to the box body.

[0009] By adopting the above technical solution, the staff slides the limit bar. Since the stop block is located on the sliding path of the limit bar, the limit bar can push the stop block to move, allowing the stop block to be smoothly inserted into the stop groove, so that the stop block can limit the box cover, allowing the box cover to be fixed on the box body, reducing the possibility of the box cover moving in the box body.

[0010] Optionally, a limiting inclined plane is provided on the limiting strip, and the distance between the limiting inclined plane and the box cover gradually increases along the extrusion direction of the movable plate, and the limiting inclined plane is located on the extrusion path of the movable plate.

[0011] By adopting the above technical solution, the distance between the limiting slope and the box cover is gradually increased along the extrusion direction of the movable plate, and the limiting slope is located on the extrusion path of the movable plate. If an explosion occurs in the junction box, the movable plate moves, and the movable plate drives the limiting bar to move through the limiting slope, so that the limiting bar can push the stop block to insert into the stop groove, thereby preventing outsiders from opening the box cover when the flame is not extinguished, thereby reducing the possibility of external air entering the box body and causing the flame to reignite, and reducing the problem of the box cover moving due to the explosion causing external air to enter and reignite the flame; at the same time, the box cover is fixed on the box body to avoid the impact force generated by the explosion causing the box body and the box cover to separate, and causing external debris to enter the box body and cause damage to the wires.

[0012] Optionally, a moving hole for the moving plate to pass through is opened on the box body; when the moving bar squeezes the fire extinguishing bag, the moving plate passes through the moving hole.

[0013] By adopting the above technical solution, when an explosion occurs in the box body, the movable bar protrudes out of the box body through the movable hole, so that the staff can directly observe the position of the movable bar to know the situation inside the junction box, thereby avoiding the staff from rashly opening the junction box.

[0014] Optionally, a placement hole is provided on the movable plate, a placement plate is rotatably connected to the placement hole, and the placement hole is used for the fire extinguishing bag to pass through.

[0015] By adopting the above technical solution, the placement plate is rotatably connected to the placement hole, and the staff rotates the placement plate to allow the fire extinguishing bag to enter the receiving groove through the placement hole, so that the staff can install the fire extinguishing bag in the receiving groove again.

[0016] Optionally, a first magnet is provided on the placement plate, a groove for inserting the first magnet is opened on the movable plate, and a second magnet is provided in the groove; when the second magnet absorbs the first magnet, the first magnet is inserted into the groove, and the placement plate is fixed at the placement hole.

[0017] By adopting the above technical solution, the first magnet is inserted into the groove by attracting the second magnet, so that the groove wall of the groove limits the first magnet, making it difficult for the placement plate to rotate on the movable plate, so that the placement plate can be fixed on the movable plate, reducing the possibility of squeezing the fire extinguishing bag and causing the fire extinguishing bag to escape from the receiving groove from the placement hole.

[0018] Optionally, a third magnet is disposed outside the box body, and the third magnet attracts the first magnet; when the third magnet attracts the first magnet, the first magnet is separated from the moving plate.

[0019] By adopting the above technical solution, the third magnet absorbs the first magnet and separates the first magnet from the movable plate, so that the first magnet does not limit the placement plate, allowing the staff to rotate the placement plate to facilitate the subsequent placement of the fire extinguishing bag through the placement hole into the receiving slot; the movable plate protrudes out of the box body through the movable hole, so that the placement plate can be rotated, and the placement plate can be limited by the first magnet at normal times, further reducing the possibility of the placement plate rotating at the placement hole.

[0020] Optionally, a stop bar is rotatably connected to the movable plate, and when the movable bar passes through the placement hole, the stop bar can abut against the outer surface of the box body.

[0021] By adopting the above technical solution, the stop bar is rotatably connected to the moving plate. When the moving bar passes through the placement hole, the stop bar rotates due to gravity, allowing the stop bar to abut the outer surface of the box body, so that the stop bar restricts the moving bar from moving in the moving hole, thereby preventing the moving bar from retreating into the box body.

[0022] Optionally, a sliding hole is opened on the movable plate, and a sliding bar is slidably connected to the sliding hole; when the fire extinguishing bag is placed in the receiving groove, the sliding bar protrudes from the movable plate; when the fire extinguishing bag is squeezed, the sliding bar is located in the receiving groove.

[0023] By adopting the above technical solution, the sliding bar is slidably connected to the sliding hole. When the fire extinguishing bag is placed in the receiving groove, the fire extinguishing bag abuts the sliding bar, allowing the sliding bar to protrude from the moving plate, so that the staff can directly observe the sliding bar, and thus the staff can know whether there is a fire extinguishing bag in the placement groove; when the fire extinguishing bag is squeezed or the fire extinguishing bag is not placed in the receiving groove, the sliding bar can be inserted into the receiving groove due to the influence of gravity, so that the sliding bar will not protrude from the moving plate. At this time, the staff can know that the fire extinguishing bag needs to be installed, so as to check whether the fire extinguishing bag is installed in place.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. If an explosion occurs in the junction box, the impact force generated by the explosion will drive the movable plate to move, so that the movable strip in the movable plate can squeeze the fire extinguishing bag, so that the fire extinguishing bag can be separated from the through hole, so that the fire extinguishing bag can cover the connection between the wire and the solar panel, making it difficult for the inside of the junction box to catch fire, reducing the impact of the explosion in the junction box, increasing the explosion-proof performance of the solar panel, and then the explosion of the junction box will not burn the solar panel, reducing the damage to the solar panel.

[0025] 2. The distance between the limiting slope and the box cover gradually increases along the extrusion direction of the moving plate. The limiting slope is located on the extrusion path of the moving plate. If an explosion occurs in the junction box, the moving plate moves, and the moving plate drives the limiting strip to move through the limiting slope, so that the limiting strip can push the stop block to insert into the stop groove, thereby preventing outsiders from opening the box cover when the flame is not extinguished, thereby reducing the possibility of external air entering the box body and causing the flame to reignite; at the same time, the box cover is fixed on the box body to prevent the impact force generated by the explosion from causing the box body and the box cover to separate, and causing external debris to enter the box body and cause damage to the wires. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a structural schematic diagram highlighting the box body in the embodiment of the present application; Figure 3 is a structural schematic diagram highlighting the accommodation block in an embodiment of the present application; Figure 4 is a structural schematic diagram highlighting the movable plate in an embodiment of the present application; Figure 5 is along Figure 4 Partial cross-sectional view along line AA; Figure 6 is along Figure 1 Partial cross-sectional view along line BB.

[0027] Reference numerals: 1, solar panel; 11, wire; 2, junction box; 21, box body; 22, accommodating groove; 221, joint; 23, accommodating block; 231, accommodating groove; 232, through hole; 233, fire extinguishing bag; 24, moving hole; 25, third magnet; 251, fourth magnet; 26, moving groove; 261, limiting strip; 262, limiting inclined plane; 27, stop plate; 271, limiting groove; 272, stopping hole; 273, stopping spring; 274, stop block; 275, stop slope; 276, installation groove; 3, box cover; 31, locking groove; 32, stop groove; 4, moving plate; 41, moving bar; 411, puncture block; 42, placement hole; 421, placement plate; 422, card slot; 423, first magnet; 424, iron sheet; 425, card hole; 43, groove; 431, second magnet; 44, rotating groove; 441, stop bar; 45, sliding hole; 451, sliding bar. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1-6 This application is described in further detail.

[0029] This embodiment discloses an explosion-proof solar panel. Figure 1 and Figure 2 An explosion-proof solar panel includes a solar panel 1, a junction box 2 is fixedly connected to the surface of the solar panel 1, the junction box 2 includes a box body 21 and a box cover 3, and the box cover 3 is detachably connected to the box body 21. A wire 11 is arranged in the junction box 2, and the wire 11 is used to connect to the solar panel 1.

[0030] Reference Figure 2 and Figure 3 A receiving groove 22 is provided on the surface of the box body 21, and three connectors 221 are fixedly connected in the receiving groove 22. The connectors 221 are used to connect with the wires 11. A receiving block 23 is fixedly connected in the receiving groove 22, and a receiving groove 231 is provided on the surface of the receiving block 23 away from the bottom wall of the receiving groove 22. Three through holes 232 are provided on the surface of the receiving block 23 facing the connector 221, and each through hole 232 is aligned with a different connector 221.

[0031] Reference Figure 2 and Figure 3 A fire extinguishing bag 233 is placed in the receiving groove 231, and sodium carbonate particles are contained in the fire extinguishing bag 233. A movable plate 4 is slidably connected to the surface of the receiving block 23, and the movable plate 4 can completely block the opening of the receiving groove 231. A movable hole 24 is opened on the surface of the box body 21 for the movable plate 4 to pass through. When the joint 221 and the wire 11 explode, the movable plate 4 is moved by the explosion, and a part of the movable plate 4 passes through the movable hole 24, and the movable plate 4 still blocks the opening of the receiving groove 231.

[0032] Reference Figure 3 and Figure 4 Two moving bars 41 are integrally formed on the surface of the moving plate 4. When the moving plate 4 blocks the receiving groove 231, the moving bar 41 is located in the receiving groove 231. A plurality of puncture blocks 411 are arranged on the surface of the moving bar 41 facing the moving hole 24. The puncture blocks 411 are arranged in an array along the length direction of the moving bar 41. When the moving bar 41 moves, the puncture blocks 411 can puncture the fire extinguishing bag 233, so that the sodium carbonate particles in the fire extinguishing bag 233 are sprayed from the through hole 232 to cover the connection between the joint 221 and the wire 11.

[0033] Reference Figure 3 and Figure 4 A placement hole 42 is provided on the surface of the movable plate 4, and the placement hole 42 is for the fire extinguishing bag 233 to pass through. A placement plate 421 is rotatably connected to the placement hole 42, and the placement plate 421 can completely block the opening of the placement hole 42. A card slot 422 is provided on the surface of the placement plate 421, and an iron sheet 424 is fixedly connected to the bottom wall of the card slot 422, and a first magnet 423 is provided in the card slot 422. When the placement plate 421 blocks the placement hole 42, the first magnet 423 attracts the iron sheet 424, and the first magnet 423 can be fixed in the receiving groove 231.

[0034] Reference Figure 4 and Figure 5 , a groove 43 is provided on the surface of the movable plate 4 for the first magnet 423 to be inserted. The groove 43 penetrates to the side of the movable plate 4, and a second magnet 431 is fixedly connected to the groove wall of the groove 43 away from the card slot 422, and the second magnet 431 can absorb the first magnet 423. When the placement plate 421 blocks the placement hole 42, the second magnet 431 absorbs the first magnet 423, and one end of the first magnet 423 is inserted into the groove 43, so that the placement plate 421 and the movable plate 4 are fixed to each other.

[0035] Reference Figure 2 , Figure 4 and Figure 5 A third magnet 25 is fixedly connected to the outer surface of the box body 21. The third magnet 25 can absorb the first magnet 423, and the magnetic force of the third magnet 25 on the first magnet 423 is greater than the magnetic force of the second magnet 431 on the first magnet 423. A fourth magnet 251 is integrally formed on the third magnet 25. The fourth magnet 251 can absorb the first magnet 423, and the third magnet 25 and the fourth magnet 251 are perpendicular to each other. A card hole 425 is opened on the side of the movable plate 4, and the card hole 425 is for the fourth magnet 251 to pass through. The card hole 425 penetrates the placement plate 421, and the card hole 425 is connected to the card slot 422. The card hole 425 is located on one side of the card slot 422, and the groove 43 is located on the other side of the card slot 422.

[0036] Reference Figure 2 , Figure 4 and Figure 5 When the moving plate 4 passes through the moving hole 24, the fourth magnet 251 slides in the locking hole 425, so that the fourth magnet 251 absorbs the first magnet 423, so that the first magnet 423 is separated from the groove 43. At this time, the third magnet 25 absorbs the first magnet 423, so that the first magnet 423 can be separated from the groove 43.

[0037] Reference Figure 3 and Figure 4 The surface of the movable plate 4 facing the receiving groove 231 is provided with a rotation groove 44, and a stopper bar 441 is rotatably connected in the rotation groove 44. The stopper bar 441 can rotate in the direction in which the movable plate 4 protrudes from the moving hole 24. The stopper bar 441 can extend out of the rotation groove 44, and the length of the stopper bar 441 is greater than the thickness of the movable plate 4. When one end of the movable plate 4 passes through the moving hole 24, the stopper bar 441 passes through the moving hole 24, and the stopper bar 441 lacks the limit of the fire extinguishing bag 233. At this time, the stopper bar 441 can fall down, so that the stopper bar 441 can limit the movable plate 4 from returning to the receiving groove 22.

[0038] Reference Figure 3 and Figure 4 A sliding hole 45 is provided on the surface of the movable plate 4, and the sliding hole 45 is connected to the receiving groove 231. A sliding bar 451 is slidably connected in the sliding hole 45, and the sliding bar 451 can be inserted into the receiving groove 231, and the length of the sliding bar 451 is greater than the length of the sliding hole 45. When the fire extinguishing bag 233 is placed in the receiving groove 231, the fire extinguishing bag 233 abuts against the sliding bar 451, and the sliding bar 451 protrudes from the movable plate 4; when the fire extinguishing bag 233 is not placed in the receiving groove 231, the sliding bar 451 is located in the receiving groove 231, and the sliding bar 451 does not protrude from the movable plate 4.

[0039] Reference Figure 6 A moving groove 26 connected to the moving hole 24 is provided on the groove wall of the accommodating groove 22, and a limiting strip 261 is slidably connected in the moving groove 26, and the limiting strip 261 can be inserted into the moving hole 24. A limiting inclined surface 262 is provided on the surface of the limiting strip 261 away from the bottom wall of the moving groove 26, and the distance between the limiting inclined surface 262 and the bottom wall of the moving groove 26 gradually decreases along the vertical direction, and the limiting inclined surface 262 is located on the moving path of the moving plate 4.

[0040] Reference Figure 6 The stopper plate 27 is fixedly connected in the receiving groove 22, and a limit groove 271 is provided on the surface of the stopper plate 27 for the limit strip 261 to be inserted. When the moving plate 4 is subjected to the impact force of the explosion, the moving plate 4 pushes the limit strip 261 to move through the limit slope 262, so that the limit strip 261 is inserted into the limit groove 271.

[0041] Reference Figure 6The surface of the box cover 3 is provided with a locking groove 31 for inserting the stop block 274. When the box cover 3 is fixed to the box body 21, the stop plate 27 is located in the locking groove 31. The surface of the stop plate 27 is provided with a stop hole 272 connected to the limiting groove 271. The groove wall of the limiting groove 271 is provided with a mounting groove 276 connected to the stop hole 272. A stop spring 273 is arranged in the mounting groove 276.

[0042] Reference Figure 6 One end of the stop spring 273 is fixedly connected to the bottom wall of the mounting groove 276, and the other end of the stop spring 273 is fixedly connected to the stop block 274. The stop spring 273 drives the stop block 274 to move into the limiting groove 271; that is, when the stop block 274 protrudes from the stop hole 272, the stop spring 273 is in a stretched state; when the stop block 274 is located in the limiting groove 271, the stop spring 273 is in a non-stressed state.

[0043] Reference Figure 6 The locking groove 31 has a groove wall provided with a stop groove 32 for inserting the stop block 274. When the stop plate 27 is located in the locking groove 31, the stop groove 32 is aligned with the stop hole 272. When the stop block 274 is inserted into the stop groove 32, the box cover 3 is fixed on the box body 21.

[0044] Reference Figure 6 The stop block 274 has a stop bevel 275 on its surface facing the stop spring 273. The distance between the stop bevel 275 and the stop spring 273 gradually decreases along the insertion direction of the stop block 274, and the stop bevel 275 is located on the insertion path of the limit bar 261. When the limit bar 261 is inserted into the limit groove 271, the limit bar 261 pushes the stop block 274 to move through the stop bevel 275, so that the stop block 274 is inserted into the stop groove 32.

[0045] Reference Figure 6 When the movable plate 4 protrudes from the movable hole 24, the movable plate 4 pushes the limiting strip 261 to move through the limiting inclined surface 262, allowing the limiting strip 261 to be inserted into the limiting groove 271. At this time, the limiting strip 261 pushes the stop block 274 to move through the stopping inclined surface 275, allowing the stop block 274 to be inserted into the stopping groove 32, thereby realizing the fixation of the stop block 274 to the box cover 3, so that the box cover 3 and the box body 21 can be locked.

[0046] The implementation principle of an explosion-proof solar panel in an embodiment of the present application is as follows: when the joint 221 and the wire 11 explode, the movable plate 4 moves toward the movable hole 24. At this time, the movable bar 41 squeezes the fire extinguishing bag 233, allowing the powder in the fire extinguishing bag 233 to cover the connection between the joint 221 and the wire 11. At this time, the movable plate 4 pushes the limiting bar 261 to move through the limiting slope 262, allowing the limiting bar 261 to be inserted into the limiting groove 271. At this time, the limiting bar 261 drives the stop block 274 to move through the stopping slope 275, allowing the stop block 274 to be inserted into the stopping groove 32, thereby fixing the box cover 3 and the box body 21; at the same time, the fourth magnet 251 absorbs the first magnet 423, allowing the first magnet 423 to separate from the groove 43, and then the third magnet 25 absorbs the first magnet 423, allowing the first magnet 423 to separate from the movable plate 4.

[0047] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and similar words do not indicate a quantitative limit, but indicate that there is at least one. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the design concept of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof solar panel, comprising a solar panel (1), wherein a junction box (2) is provided on the solar panel (1), and a wire (11) is provided on the junction box (2), wherein: The junction box (2) comprises a box cover (3) and a box body (21); a receiving groove (231) is provided on the box body (21); a through hole (232) communicating with the receiving groove (231) is provided on the box body (21); a fire extinguishing bag (233) is provided in the receiving groove (231); a moving plate (4) is slidably connected to the receiving groove (231); a moving bar (41) is provided on the moving plate (4); when an explosion occurs in the junction box (2), the moving bar (41) squeezes the fire extinguishing bag (233), and the fire extinguishing bag (233) covers the connection point of the wire (11) through the through hole (232).

2. The explosion-proof solar panel according to claim 1, characterized in that: The box body (21) is slidably connected to a limit strip (261), and a stop block (274) is slidably connected to the box body (21). The stop block (274) is located on the sliding path of the limit strip (261), and a stop groove (32) for the stop block (274) to be inserted is provided on the box cover (3); when the stop block (274) is located in the stop groove (32), the box cover (3) is fixed to the box body (21).

3. The explosion-proof solar panel according to claim 2, characterized in that: The limiting strip (261) is provided with a limiting inclined surface (262), the distance between the limiting inclined surface (262) and the box cover (3) gradually increases along the extrusion direction of the moving plate (4), and the limiting inclined surface (262) is located on the extrusion path of the moving plate (4).

4. The explosion-proof solar panel according to claim 1, characterized in that: The box body (21) is provided with a moving hole (24) for the moving plate (4) to pass through; when the moving bar (41) squeezes the fire extinguishing bag (233), the moving plate (4) passes through the moving hole (24).

5. The explosion-proof solar panel according to claim 4, characterized in that: The movable plate (4) is provided with a placement hole (42), a placement plate (421) is rotatably connected to the placement hole (42), and the placement hole (42) is used for the fire extinguishing bag (233) to pass through.

6. The explosion-proof solar panel according to claim 5, characterized in that: The placement plate (421) is provided with a first magnet (423), the movable plate (4) is provided with a groove (43) for the first magnet (423) to be inserted, and the groove (43) is provided with a second magnet (431); when the second magnet (431) attracts the first magnet (423), the first magnet (423) is inserted into the groove (43), and at this time, the placement plate (421) is fixed at the placement hole (42).

7. The explosion-proof solar panel according to claim 6, characterized in that: A third magnet (25) is disposed outside the box body (21), and the third magnet (25) absorbs the first magnet (423); when the third magnet (25) absorbs the first magnet (423), the first magnet (423) separates from the moving plate (4).

8. The explosion-proof solar panel according to claim 5, characterized in that: A stop bar (441) is rotatably connected to the movable plate (4); when the movable bar (41) passes through the placement hole (42), the stop bar (441) can abut against the outer surface of the box body (21).

9. The explosion-proof solar panel according to claim 1, characterized in that: The movable plate (4) is provided with a sliding hole (45), and a sliding bar (451) is slidably connected to the sliding hole (45); when the fire extinguishing bag (233) is placed in the receiving groove (231), the sliding bar (451) protrudes from the movable plate (4); when the fire extinguishing bag (233) is squeezed, the sliding bar (451) is located in the receiving groove (231).

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