Explosion-proof fire alarm

Abstract

The utility model discloses an explosion-proof fire-fighting alarm, which comprises a shell, an end cover fixed on the shell and a panel fixed on the end cover, a rotatable trigger plate is arranged on one side of the end cover, the panel is provided with a window for a user to press the trigger plate, and the end cover and the panel are fixed on the shell. A rotatable locking block is arranged on the other side of the end cover, the locking block is provided with an inclined guide face and located below one side of the trigger plate, the locking block is provided with an abutting portion and arranged below the guide face, and the end cover is provided with a blocking portion, abuts against the locking block and is used for preventing the locking block from rotating in the direction of the trigger plate. The end cover is provided with a first spring and applies upward force to the locking block. When the trigger plate is reset, only downward pressure needs to be applied to the reset button to enable the abutting portion to leave the upper portion of the trigger plate, the trigger plate can be reset through the second spring, keys do not need to be found and distinguished, the reset speed of the trigger plate is increased, and the product has the advantage of being convenient to reset.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof equipment technology, and in particular to an explosion-proof fire alarm. Background Technology

[0002] Currently, many industrial sectors, such as petroleum, chemical, coal, and defense, frequently leak or spill various flammable and explosive gases, liquids, dusts, and fibers during production, processing, transportation, and storage. When these substances mix with air, they can form explosive mixtures. When the concentration of such mixtures reaches explosive limits, the presence of an ignition source can cause serious accidents such as explosions and fires.

[0003] The explosion-proof manual alarm is suitable for the above-mentioned working environment. Its main function is to manually trigger the alarm in the event of a fire, so that relevant personnel can take measures quickly to prevent the fire from spreading and reduce the risks that may be caused by the delay of automatic detection by the equipment. However, the alarm needs to be unlocked by a specific key to reset the trigger plate. Since there are many keys, they are not easy to keep and are easy to lose or distinguish, which makes the reset process quite troublesome. Therefore, the applicant has made a useful design and found a solution to the above problems. The technical solution to be introduced below is generated in this context. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of traditional explosion-proof fire alarm designs and provide a product that is easy to reset.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] An explosion-proof fire alarm includes a housing, an end cap fixed to the housing, and a panel fixed to the end cap. One side of the end cap has a rotatable trigger plate. The panel has a window for the user to press the trigger plate. The other side of the end cap has a rotatable locking block. The locking block has an inclined guide surface located below the trigger plate. The locking block has an abutment portion located below the guide surface. The end cap has a blocking portion that abuts against the locking block to prevent the locking block from rotating towards the trigger plate. The end cap has a first spring that applies an upward force to the locking block. The panel has a liftable reset button that abuts against the locking block.

[0007] Preferably, the end cap is provided with at least two first connecting portions, and the first connecting portions are provided with first through holes.

[0008] Preferably, the trigger plate is provided with an inclined support arm, which is hinged to the first through hole.

[0009] Preferably, the end cap is provided with a second connecting portion, the blocking portion is disposed in the second connecting portion, the second connecting portion is provided with a second through hole, and the second connecting portion is provided with a first protrusion.

[0010] Preferably, one end of the locking block is hinged to the second through hole, the locking block is provided with an extension, the extension is provided with a groove for accommodating the reset button, the back of the extension is provided with a second protrusion, and the first spring is disposed on the outer wall of the first protrusion and the second protrusion, and respectively abuts against the extension and the second connecting part.

[0011] Preferably, the end cap is provided with a soft rubber sleeve and is located below the trigger plate. A trigger rod is provided inside the soft rubber sleeve. The trigger rod is provided with a retaining ring. A second spring is provided between the retaining ring and the end cap so that the trigger rod abuts against the top of the soft rubber sleeve. The end cap is provided with a fixing ring and is sleeved on the outer wall of the soft rubber sleeve.

[0012] Preferably, the housing is provided with at least two conduits, and a grounding port is provided between the two conduits.

[0013] Preferably, the housing contains an alarm module circuit board, which has a tactile switch located below the trigger rod and has wiring terminals located near the conduit.

[0014] Preferably, the panel is provided with at least two LED alarm lights and is electrically connected to the alarm module circuit board.

[0015] Beneficial effects:

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, when the trigger plate is pressed downwards, it moves on the guide surface, pushing the locking block away from the trigger plate and accumulating energy in the first spring. When the trigger plate is below the contact part, the first spring releases its elastic force, causing the locking block to reset and the contact part to be positioned above the trigger plate, preventing the trigger plate from resetting and maintaining the alarm state. Only by applying downward pressure to the reset button to rotate the locking block and move the contact part away from above the trigger plate, the trigger plate can be reset by the elastic force of the second spring. This eliminates the need to search for or distinguish the key, making the product convenient to reset. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an explosion-proof fire alarm device according to the present invention;

[0019] Figure 2 This is a side cross-sectional view of an explosion-proof fire alarm device according to the present invention;

[0020] Figure 3This utility model Figure 2 A partial enlarged view A of an explosion-proof fire alarm device;

[0021] Figure 4 This is an exploded structural diagram of an explosion-proof fire alarm device according to the present invention;

[0022] The correspondence between the labels and component names in the attached figures is as follows:

[0023] Reference numerals: 1. Housing; 2. End cap; 3. Panel; 4. Trigger plate; 5. Locking block; 6. Reset button; 7. Soft rubber sleeve; 8. Alarm module circuit board; 9. First spring;

[0024] 11. Conduit; 12. Grounding port;

[0025] 21. First connecting part; 22. Second connecting part;

[0026] 211. First through hole;

[0027] 221. Second through hole; 222. Blocking part; 223. First protrusion;

[0028] 31. Window;

[0029] 41. Support arm;

[0030] 51. Guiding surface; 52. Abutting part; 53. Extension part; 54. Sinking groove; 55. Second protrusion;

[0031] 71. Trigger rod; 72. Retaining ring; 73. Second spring; 74. Retaining ring;

[0032] 81. Tactile switch; 82. Terminal block; 83. LED alarm light. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] Reference example Figures 1 to 4 An explosion-proof fire alarm includes a housing 1, an end cap 2 fixed to the housing 1, and a panel 3 fixed to the end cap 2. One side of the end cap 2 is provided with a rotatable trigger plate 4. The panel 3 is provided with a window 31 for the user to press the trigger plate 4. The other side of the end cap 2 is provided with a rotatable locking block 5. The locking block 5 is provided with an inclined guide surface 51 and is located below one side of the trigger plate 4. The locking block 5 is provided with an abutting part 52 and is located below the guide surface 51. The end cap 2 is provided with a blocking part 222 and abuts against the locking block 5 to prevent the locking block 5 from rotating toward the trigger plate 4. The end cap 2 is provided with a first spring 9 and applies an upward force to the locking block. The panel 3 is provided with a liftable reset button 6 and abuts against the locking block 5.

[0037] It is worth mentioning that the end cap 2 is provided with at least two first connecting parts 21, each first connecting part 21 is provided with a first through hole 211, and the first connecting part 21 provides support for the support arm 41;

[0038] It is worth mentioning that the trigger plate 4 is provided with an inclined support arm 41, which is hinged to the first through hole 211 and rotates around the first through hole 211.

[0039] It is worth mentioning that the end cap 2 is provided with a second connecting part 22, a blocking part 222 is provided in the second connecting part 22, the second connecting part 22 is provided with a second through hole 221, and the second connecting part 22 is provided with a first protrusion 223, which prevents the first spring 9 from disengaging.

[0040] It is worth mentioning that one end of the locking block 5 is hinged to the second through hole 221. The locking block is provided with an extension 53. The extension 53 is provided with a recess 54 for accommodating the reset button 6. The back of the extension 53 is provided with a second protrusion 55. The first spring 9 is provided on the outer wall of the first protrusion 223 and the second protrusion 55, and abuts against the extension 53 and the second connecting part 22 respectively. The extension 53 is for bearing the force of the first spring 9. The recess 54 prevents the reset button 6 from disengaging from the locking block 5. The second protrusion 55 prevents the first spring 9 from disengaging.

[0041] It is worth mentioning that the end cap 2 is provided with a soft rubber sleeve 7 and is located below the trigger plate 4. The soft rubber sleeve 7 is provided with a trigger rod 71 and a retaining ring 72. A second spring 73 is provided between the retaining ring 72 and the end cap 2 so that the trigger rod 71 abuts against the top of the soft rubber sleeve 7. The end cap 2 is provided with a fixing ring 74 and is sleeved on the outer wall of the soft rubber sleeve 7. The soft rubber sleeve 7 is elastic and, together with the second spring 73, increases the reset speed of the trigger rod 71. The retaining ring 72 bears the elastic force of the second spring 73, and the fixing ring 74 serves to fix the soft rubber sleeve 7.

[0042] It is worth mentioning that the housing 1 is provided with at least two conduits 11, and a grounding port 12 is provided between the two conduits 11. The conduits 11 allow external power lines to enter the housing 1 and are electrically connected to the terminal block 82. The grounding wire led out from the terminal block 82 passes through one of the conduits 11 and is directly connected to the grounding port 12, saving the travel distance of the grounding wire.

[0043] It is worth mentioning that the housing 1 is equipped with an alarm module circuit board 8. The alarm module circuit board 8 is equipped with a tactile switch 81 and is located below the trigger rod 71. The alarm module circuit board 8 is equipped with a wiring terminal 82 and is located near the conduit 11. The alarm module circuit board 8 is existing technology and can be purchased from the market, so it will not be described in detail here.

[0044] It is worth mentioning that the panel 3 is equipped with at least two LED alarm lights 83, which are electrically connected to the alarm module circuit board 8. When the touch switch 81 is activated, the LED alarm lights 83 will emit red light to warn nearby personnel.

[0045] The working principle of this utility model is described as follows:

[0046] When the trigger plate 4 is pressed downward, it is driven to move on the guide surface 51 and push the locking block 5 to rotate away from the trigger plate 4. At the same time, the extension 53 shortens the distance between itself and the second connecting part 22, so that the first spring 9 stores energy. The trigger rod 71 is pushed by the trigger plate 4 and sinks down to trigger the light touch switch 81 to close. The soft rubber sleeve 7 is compressed and the second spring 73 stores energy.

[0047] When the trigger plate 4 is lower than the contact part 52, the first spring 9 releases its elastic force to push the locking block 5 to reset. The contact part 52 and the trigger plate 4 abut against each other to form a locked state, maintaining the state of emitting an alarm sound and a red alarm light.

[0048] When downward pressure is applied to the reset button 6, the locking block 5 rotates away from the trigger plate 4. The trigger plate 4 is not subject to resistance, and the soft rubber sleeve 7 and the second spring 73 release their elastic force to push the trigger rod 71 and the trigger plate 4 to reset.

[0049] The above design scheme allows the product to achieve the advantage of easy reset.

[0050] The above description provides a more detailed explanation of the present invention in conjunction with specific embodiments. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present invention.

Claims

1. An explosion-proof fire alarm comprising a housing (1), an end cap (2) fixed to the housing (1), and a face plate (3) fixed to the end cap (2), characterized in that: One side of the end cover (2) is provided with a rotatable trigger plate (4), the panel (3) is provided with a window (31) for the user to press the trigger plate (4), the other side of the end cover (2) is provided with a rotatable locking block (5), the locking block (5) is provided with an inclined guide surface (51) and is located below the side of the trigger plate (4), the locking block (5) is provided with a resisting part (52) and is located below the guide surface (51), the end cover (2) is provided with a blocking part (222) and abuts the locking block (5) to prevent the locking block (5) from rotating towards the trigger plate (4), the end cover (2) is provided with a first spring (9) and applies an upward force to the locking block, the panel (3) is provided with a liftable reset button (6) and abuts the locking block (5).

2. The explosion-proof fire alarm of claim 1, wherein: The end cover (2) is provided with at least two first connecting parts (21), and the first connecting part (21) is provided with a first through hole (211).

3. The explosion-proof fire alarm of claim 2, wherein: The trigger plate (4) is provided with an inclined support arm (41) hinged to the first through hole (211).

4. The explosion-proof fire alarm of claim 1, wherein: The end cover (2) is provided with a second connecting part (22), the blocking part (222) is arranged on the second connecting part (22), the second connecting part (22) is provided with a second through hole (221), and the second connecting part (22) is provided with a first protruding column (223).

5. The explosion-proof fire alarm of claim 4, wherein: One end of the locking block (5) is hinged to the second through hole (221), the locking block is provided with an extension (53), the extension (53) is provided with a recess (54) accommodating the reset button (6), the back of the extension (53) is provided with a second protruding column (55), and the first spring (9) is arranged on the outer walls of the first protruding column (223) and the second protruding column (55) and abuts the extension (53) and the second connecting part (22) respectively.

6. The explosion-proof fire alarm of claim 1, wherein: The end cover (2) is provided with a soft rubber sleeve (7) located below the trigger plate (4), the soft rubber sleeve (7) is provided with a trigger rod (71) inside, the trigger rod (71) is provided with a retaining ring (72), a second spring (73) is arranged between the retaining ring (72) and the end cover (2), so that the trigger rod (71) abuts the top of the soft rubber sleeve (7), and the end cover (2) is provided with a fixing ring (74) sleeved on the outer wall of the soft rubber sleeve (7).

7. The explosion-proof fire alarm of claim 1, wherein: The shell (1) is provided with at least two wire tubes (11), and the two wire tubes (11) are provided with a grounding port (12) therebetween.

8. The explosion-proof fire alarm of claim 7, wherein: The shell (1) is provided with an alarm module circuit board (8) inside, the alarm module circuit board (8) is provided with a light touch switch (81) located below the trigger rod (71), and the alarm module circuit board (8) is provided with a wiring terminal (82) close to the wire tube (11).

9. The explosion-proof fire alarm of claim 8, wherein: The panel (3) is provided with at least two LED alarm lights (83) electrically connected with the alarm module circuit board (8).

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