Smoke alarm for fire fighting

Abstract

The utility model relates to the field of smoke alarms, and discloses a smoke alarm for fire fighting, which comprises a mounting plate, the front and rear sides of the top side of the mounting plate are respectively provided with two chutes, the interiors of the chutes are connected with a base through a dismounting mechanism, the front and rear sides of the base are respectively provided with two slots, and the slots are connected with the mounting plate. A circular groove is formed in the middle end of the top side of the mounting plate, the base is inserted into the circular groove, a shell is fixedly connected to the top side of the base, a smoke sensor is fixedly connected to the top side of the base, protective covers are connected to the left side and the right side of the shell through buckle assemblies, and a plurality of circular holes are formed in the peripheries of the protective covers; the top side of the shell is fixedly connected with a loudspeaker, and the top side of the loudspeaker is fixedly connected with an alarm lamp. According to the utility model, the alarm is convenient to disassemble, replace or maintain, so that the replacement or maintenance efficiency is improved, and the alarm is provided with a protection structure, so that the damage of winged insects to the alarm is prevented, and the service life of the alarm is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of smoke alarms, in particular to a smoke alarm for fire fighting. Background Art

[0002] Smoke alarm, also known as fire smoke alarm, smoke sensor, smoke inductor, etc., is a smoke detector based on the principle of smoke particles scattering and absorbing (or blocking) light. Dimming (or shading) photoelectric smoke detectors are less used. Most of the production and application are scattered light photoelectric smoke detectors. Its working principle is that when smoke particles enter the sensitive space surrounded by a maze, the smoke particles absorb the incident light and emit light to the surrounding with the same wavelength. After part of the scattered light is received by the infrared photodiode, the impedance of the light receiving element changes, forming a photocurrent, thereby realizing the function of converting the smoke signal into an electrical signal. When the photocurrent reaches a certain level, the detector will send out an alarm signal. It is widely used in household gas leaks, mine gas detection and other chemical production fields.

[0003] After searching, a smoke alarm with announcement number CN217386469U at least includes: a top cover, one side of the top cover is a conical reflective surface; a bottom plate, one side of the bottom plate is provided with a first light source and a first photoelectric receiver; the first light source and the first photoelectric receiver are both arranged facing the conical reflective surface; an optical deflection grid is arranged between the top cover and the bottom plate, suitable for connecting the top cover and the bottom plate, and the optical deflection grid is arranged along the circumference of the bottom plate; in a smoke-free state, the light emitted by the first light source is reflected by the conical reflective surface and then emitted from the optical deflection grid; in a smoke-presence state, at least part of the light emitted by the first light source is reflected by smoke particles and then received by the first photoelectric receiver. This smoke alarm does not need to set up a complex maze structure, and has a more streamlined structure and a smaller size. It can be used in miniaturized application scenarios, and can meet the requirements of rapid response to smoke detection in a smaller space. The product has higher applicability;

[0004] Based on the above patent, by integrating the first light source and the first photoelectric receiver on the bottom plate, and using the conical reflective surface on the top cover to change the light path, the light emitted by the first light source is guided out through the optical deflection grid in a smoke-free state, while preventing external light from entering, thereby reducing the interference of ambient light. Compared with the smoke alarm in the prior art, there is no need to set up a complex maze structure, the structure is more streamlined, the volume is smaller, and it can be applied to miniaturized application scenarios. In a smaller space, it can meet the rapid response to smoke detection, and the product has higher applicability. However, the alarm is not easy to disassemble, replace or maintain. When the alarm is damaged, it is time-consuming and laborious to replace it. In addition, the alarm does not have a certain protective structure, which makes it easy to be damaged by flying insects, resulting in a reduced service life. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a fire smoke alarm, which aims to make the alarm easy to disassemble, replace or maintain, thereby improving the efficiency of replacement or maintenance, and to make the alarm have a certain protective structure to prevent flying insects from damaging the alarm, thereby increasing the service life of the alarm.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fire smoke alarm comprises a mounting plate, wherein two slide grooves are provided on the front and rear sides of the top side of the mounting plate, a base is connected to the inside of the slide groove via a disassembly mechanism, two slots are provided on the front and rear sides of the base, a circular groove is provided at the middle end of the top side of the mounting plate, the base is inserted into the circular groove, a shell is fixedly connected to the top side of the base, a smoke sensor is fixedly connected to the top side of the base, a protective cover is connected to the left and right sides of the shell via a snap-on assembly, a plurality of circular holes are provided on the outer periphery of the protective cover, a speaker is fixedly connected to the top side of the shell, and an alarm light is fixedly connected to the top side of the speaker.

[0008] Furthermore, the disassembly mechanism comprises a telescopic tube fixedly connected to the inside of the slide groove, four limit bars are fixedly connected to the inside of the telescopic tube, and a limit assembly is arranged inside the telescopic tube.

[0009] Furthermore, the limit assembly includes a sliding rod slidably connected to the inside of the telescopic tube, the outer wall of the sliding rod is provided with four grooves, the positions of the grooves correspond to the limit strips, the end of the sliding rod is fixedly connected to the limit rod, the limit rod is inserted in the slot, and the internal thread of the sliding rod is connected to a threaded rod.

[0010] Furthermore, an end of the threaded rod passes through one side of the mounting plate, and a swivel is fixedly connected to the end of the threaded rod.

[0011] Furthermore, the buckle assembly includes a buckle piece fixedly connected to the left and right sides of the shell, the left and right sides of the protective cover are fixedly connected with a fixed block, one side of the fixed block is fixedly connected with a telescopic rod, the end of the telescopic rod is fixedly connected with a buckle head, the buckle head is inserted into the inside of the buckle piece, and the top side of the buckle head is fixedly connected with a paddle.

[0012] Furthermore, a spring is sleeved on the outer wall of the telescopic rod, one end of the spring is connected to one side of the fixing block, and the other end of the spring is connected to one side of the buckle head.

[0013] Furthermore, threaded blocks are fixedly connected to the four corners of the mounting plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the threaded rod is rotated by rotating the rotating ring, so that the slide rod slides in the shrink tube under the action of the limit bar, so that the limit rod is pulled out of the slot, and the base is removed from the mounting plate, so that the alarm can be replaced or maintained, making the alarm easy to disassemble and install.

[0016] 2. In the utility model, the outer shell is protected by a protective cover to prevent flying insects from entering the inner part of the outer shell and causing damage to the smoke sensor, thereby rendering the entire alarm unusable. By pressing the paddle to make the buckle head fall off the buckle piece, the protective cover can be removed from the outer shell, so that the alarm has a certain protective structure, thereby increasing the service life of the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a fire-fighting smoke alarm proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the shell structure of a fire-fighting smoke alarm proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a mounting plate of a fire smoke alarm proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a telescopic tube of a fire-fighting smoke alarm proposed by the utility model;

[0021] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0022] Legend:

[0023] 1. Threaded block; 2. Housing; 3. Mounting plate; 4. Telescopic tube; 5. Protective cover; 6. Warning light; 7. Speaker; 8. Base; 9. Smoke sensor; 10. Limit rod; 11. Sliding rod; 12. Threaded rod; 13. Swivel; 14. Limit strip; 15. Buckle piece; 16. Fixed block; 17. Telescopic rod; 18. Spring; 19. Buckle head; 20. Pick. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Reference Figure 1-Figure 3 , the utility model provides an embodiment: a fire smoke alarm, including a mounting plate 3, two slide grooves are provided on the front and rear sides of the top side of the mounting plate 3, a base 8 is connected inside the slide groove, two slots are provided on the front and rear sides of the base 8, a circular groove is provided at the middle end of the top side of the mounting plate 3, the base 8 is inserted in the circular groove, a shell 2 is fixedly connected to the top side of the base 8, a smoke sensor 9 is fixedly connected to the top side of the base 8, a protective cover 5 is connected to the shell 2, a plurality of circular holes are provided on the outer periphery of the protective cover 5, a speaker 7 is fixedly connected to the top side of the shell 2, an alarm light 6 is fixedly connected to the top side of the speaker 7, and threaded blocks 1 are fixedly connected at the four corners of the mounting plate 3;

[0026] Specifically, the mounting plate 3 is turned upside down, and the bolts are passed through the threaded block 1 and inserted into the top of the room, so that the alarm is installed in the room. When smoke is generated, the smoke floats upward to the outside of the protective plate 5, enters the inside of the housing 2 through the circular hole, and is detected by the smoke sensor 9. At this time, the smoke sensor 9 transmits the signal to the speaker 7 and the alarm light 6, so that the speaker 7 emits an alarm sound and the alarm light 6 flashes, thereby playing an alarm role.

[0027] Reference Figure 3 and Figure 4 The slide groove is fixedly connected with a telescopic tube 4, and the telescopic tube 4 is fixedly connected with four limit strips 14. The telescopic tube 4 is slidably connected with a slide rod 11. The outer wall of the slide rod 11 is provided with four grooves, and the positions of the grooves correspond to the limit strips 14. The end of the slide rod 11 is fixedly connected with a limit rod 10, and the limit rod 10 is inserted into the slot. The inner thread of the slide rod 11 is connected with a threaded rod 12, and the end of the threaded rod 12 passes through one side of the mounting plate 3, and the end of the threaded rod 12 is fixedly connected with a swivel 13;

[0028] Specifically, when the alarm needs to be replaced or maintained, the threaded rod 12 is rotated by rotating the swivel 13, so that the slide rod 11 slides in the shrink tube 4 under the action of the limit bar 14, so that the limit rod 10 is pulled out of the slot, and the base 8 is removed from the mounting plate 3, so that the alarm can be replaced or maintained, making the alarm easy to disassemble and install.

[0029] Reference Figure 5 The left and right sides of the shell 2 are fixedly connected with snap-on pieces 15, the left and right sides of the protective cover 5 are fixedly connected with fixed blocks 16, one side of the fixed block 16 is fixedly connected with a telescopic rod 17, the end of the telescopic rod 17 is fixedly connected with a snap-on head 19, the snap-on head 19 is inserted into the inside of the snap-on piece 15, the top side of the snap-on head 19 is fixedly connected with a paddle 20, the outer wall of the telescopic rod 17 is sleeved with a spring 18, one end of the spring 18 is connected to one side of the fixed block 16, and the other end of the spring 18 is connected to one side of the snap-on head 19.

[0030] Specifically, the protective cover 5 is used to protect the shell 2 to prevent flying insects from entering the shell 2 and causing damage to the smoke sensor 9, thereby rendering the entire alarm unusable. By pressing the paddle 20 to make the buckle head 19 fall off the buckle piece 15, the protective cover 5 can be removed from the shell 2, so that the alarm has a certain protective structure, thereby increasing the service life of the alarm.

[0031] Working principle: Invert the mounting plate 3, pass the bolt through the threaded block 1 and insert it into the top of the room, so as to install the alarm in the room. When smoke is generated, the smoke floats upward to the outside of the protective plate 5, enters the inside of the shell 2 through the round hole, and is detected by the smoke sensor 9. At this time, the smoke sensor 9 transmits the signal to the speaker 7 and the alarm light 6, so that the speaker 7 emits an alarm sound and the alarm light 6 flashes, thereby playing an alarm role. When the alarm needs to be replaced or maintained, the threaded rod 12 is rotated by rotating the swivel 13, so that the slide rod 11 slides in the shrink tube 4 under the action of the limit bar 14, so that the limit rod 10 is pulled out of the slot, so that the base 8 is removed from the mounting plate 3, so that the alarm can be replaced or maintained.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire smoke alarm, comprising a mounting plate (3), characterized in that: Two slide grooves are provided on both the front and rear sides of the top side of the mounting plate (3); a base (8) is connected to the inside of the slide groove via a disassembly mechanism; two slots are provided on both the front and rear sides of the base (8); a circular groove is provided at the middle end of the top side of the mounting plate (3); the base (8) is inserted into the circular groove; the top side of the base (8) is fixedly connected to the housing (2); the top side of the base (8) is fixedly connected to the smoke sensor (9); the left and right sides of the housing (2) are connected to a protective cover (5) via a snap-fit ​​assembly; a plurality of circular holes are provided on the outer periphery of the protective cover (5); the top side of the housing (2) is fixedly connected to a speaker (7); and the top side of the speaker (7) is fixedly connected to an alarm light (6).

2. A fire-fighting smoke alarm according to claim 1, characterized in that: The disassembly mechanism comprises a telescopic tube (4) fixedly connected to the inside of the slide groove, four limit bars (14) are fixedly connected to the inside of the telescopic tube (4), and a limit assembly is arranged inside the telescopic tube (4).

3. A fire-fighting smoke alarm according to claim 2, characterized in that: The limit assembly comprises a slide rod (11) slidably connected to the inside of the telescopic tube (4); the outer wall of the slide rod (11) is provided with four grooves, the positions of the grooves correspond to the limit strips (14); the end of the slide rod (11) is fixedly connected to a limit rod (10), the limit rod (10) is inserted into a slot, and the inner thread of the slide rod (11) is connected to a threaded rod (12).

4. A fire-fighting smoke alarm according to claim 3, characterized in that: The end of the threaded rod (12) passes through one side of the mounting plate (3), and the end of the threaded rod (12) is fixedly connected to a swivel (13).

5. A fire-fighting smoke alarm according to claim 1, characterized in that: The buckle assembly comprises buckle pieces (15) fixedly connected to the left and right sides of the housing (2); the left and right sides of the protective cover (5) are fixedly connected to fixing blocks (16); one side of the fixing block (16) is fixedly connected to a telescopic rod (17); the end of the telescopic rod (17) is fixedly connected to a buckle head (19); the buckle head (19) is inserted into the buckle piece (15); and the top side of the buckle head (19) is fixedly connected to a paddle (20).

6. A fire-fighting smoke alarm according to claim 5, characterized in that: The outer wall of the telescopic rod (17) is sleeved with a spring (18), one end of the spring (18) is connected to one side of the fixing block (16), and the other end of the spring (18) is connected to one side of the buckle head (19).

7. A fire-fighting smoke alarm according to claim 1, characterized in that: The four corners of the mounting plate (3) are all fixedly connected with threaded blocks (1).

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