Point-type photoelectric smoke-sensing fire detector

Abstract

The utility model relates to the technical field of fire-fighting equipment, in particular to a point-type photoelectric smoke-sensing fire detector, which comprises a mounting seat and a shell, a positioning ring is arranged on the mounting seat, the shell is arranged in the positioning ring, the positioning ring is provided with a hollow hemispherical top cover, a first air hole is formed in the positioning ring, a second air hole is formed in the top end of the shell, and a detector corresponding to the second air hole is arranged in the shell. And an indicator lamp is arranged at the top end of the shell. A dustproof net is arranged in the top cover, the shell and the mounting base are stably connected through various positioning structures, and a circuit board is arranged in the center of the bottom end of the mounting base and electrically connected with the indicator lamp and the detector. The limiting mechanism is composed of a guide groove, a positioning groove, a through groove, a positioning plate and a positioning block, and convenient installation and fixation are achieved. The detector is good in dustproof performance, capable of effectively blocking dust, stable in positioning, reasonable in smoke entering path, timely and accurate in detection and convenient to install and maintain, can be widely applied to the field of fire fighting, and provides guarantee for life and property safety.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and in particular to a point-type photoelectric smoke detector. Background Technology

[0002] Fire is an extremely destructive disaster that poses a serious threat to people's lives and property. Among numerous fire detection technologies, point-type photoelectric smoke detection technology has become an important means of early fire detection due to its advantages such as high sensitivity and high reliability.

[0003] While traditional point-type photoelectric smoke detectors have played a role in fire prevention, they still have some shortcomings. For example, their dustproof structure may not be perfect, allowing dust to easily enter the detector and affect its performance and lifespan; the positioning and connection between the detector and the mounting base may not be stable enough, and they are prone to loosening or displacement under long-term use or external interference, thus reducing the detector's reliability; in addition, the ventilation structure design of some detectors may not be reasonable enough, resulting in a slower speed at which smoke enters the detector, affecting the timeliness of detection.

[0004] With the continuous development of technology and the increasing demands for fire safety, higher requirements are being placed on the performance and reliability of point-type photoelectric smoke detectors. Therefore, developing a point-type photoelectric smoke detector with a more rational structure and superior performance is of significant practical importance. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a point-type photoelectric smoke detector to solve the problems mentioned in the background section and improve the detector's dustproof performance, positioning stability, and detection timeliness.

[0006] To solve the above problems, the technical solution adopted by this utility model is: a point-type photoelectric smoke detector, including a mounting base and a housing, a positioning ring installed on the mounting base, the housing installed inside the positioning ring, a hollow hemispherical top cover installed on the positioning ring, a first vent hole opened on the top cover, a second vent hole opened at the top of the housing, a detector corresponding to the second vent hole installed inside the housing, the housing and the mounting base being positioned by a limiting mechanism, and an indicator light installed at the top of the housing.

[0007] Furthermore, a dustproof mesh is installed inside the top cover, and a slot is formed on the inner wall of the top cover. A retaining plate is installed at the outer edge of the dustproof mesh, and the retaining plate engages with the inner wall of the slot. This structural design can effectively prevent dust from entering the detector, and the dustproof mesh is easy to install and remove, facilitating cleaning and replacement.

[0008] Furthermore, a first limiting sleeve and a second limiting sleeve are symmetrically installed on the inner wall of the housing, and a first positioning shaft and a second positioning shaft are symmetrically installed on the bottom end of the mounting base. The first positioning shaft and the second positioning shaft are respectively adapted to the first limiting sleeve and the second limiting sleeve. Through the cooperation of the first positioning shaft and the second positioning shaft with the first limiting sleeve and the second limiting sleeve, the initial positioning of the housing and the mounting base can be achieved, improving the accuracy and stability of the installation.

[0009] Furthermore, a protective cover is installed on the mounting base to protect the detector. The protective cover can prevent external objects from colliding with and damaging the detector, and also provides some dust and moisture protection.

[0010] Furthermore, positioning sleeves are symmetrically installed at the bottom end of the mounting base, and fixing blocks adapted to the positioning sleeves are symmetrically installed on the inner wall of the housing. The cooperation between the positioning sleeves and the fixing blocks can further enhance the connection stability between the housing and the mounting base.

[0011] Furthermore, a circuit board is installed at the center of the bottom of the mounting base, and the indicator light and detector are electrically connected to the circuit board. The circuit board is the core control component of the detector; it can receive signals from the detector and control the display of the indicator light according to the signal status, and it can also communicate with an external fire alarm system.

[0012] Furthermore, the limiting mechanism includes multiple guide grooves evenly spaced on the positioning ring, with positioning grooves at the bottom of the guide grooves. The outer surface of the housing has the same number of through grooves as the guide grooves. An elastically deformable positioning plate is installed on the inner wall of each through groove, and a positioning block adapted to the positioning groove is mounted on the positioning plate. When installing the housing, the positioning block is aligned with the guide groove, and then the housing is pushed upwards, causing the positioning block to slide along the guide groove. When the positioning block reaches the bottom of the guide groove, the housing is rotated, causing the positioning block to engage in the positioning groove, thus achieving a secure connection between the housing and the positioning ring. This limiting mechanism design makes the installation and disassembly of the housing very convenient, while also ensuring the stability of the connection.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. Excellent dustproof performance: By installing a dustproof net inside the top cover, dust can be effectively prevented from entering the detector, reducing the impact of dust on the detector's performance and extending the detector's service life.

[0015] 2. Stable and reliable positioning: Multiple positioning and connection structures are adopted, including the first positioning shaft and the first limiting sleeve, the second positioning shaft and the second limiting sleeve, the positioning sleeve and the fixing block, and the limiting mechanism. These structures work together to make the connection between the housing and the mounting base more stable. Under long-term use or when subjected to external interference, it is not easy to loosen or shift, thus improving the reliability of the detector.

[0016] 3. Timely and accurate detection: The hollow hemispherical top cover and the reasonably opened first and second ventilation holes allow smoke to enter the detector more quickly and be detected, thus improving the timeliness of detection. At the same time, the cooperation between the detector and the circuit board can accurately convert the smoke signal into an electrical signal, process and judge it, and ensure the accuracy of detection.

[0017] 4. Easy installation and maintenance: The design of the limiting mechanism makes the installation and disassembly of the housing very simple, requiring only pushing and rotating operations. In addition, the snap-fit ​​installation method of the dustproof net also facilitates cleaning and replacement, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a perspective view of a point-type photoelectric smoke detector according to the present invention.

[0019] Figure 2 This is a schematic diagram of the mounting base structure for a point-type photoelectric smoke detector according to this utility model.

[0020] Figure 3 This is a schematic diagram of the housing structure of a point-type photoelectric smoke detector according to the present invention.

[0021] Figure 4 This is a schematic diagram of the dustproof mesh structure of a point-type photoelectric smoke detector according to this utility model.

[0022] Figure 5 This is a half-sectional structural diagram of the base of a point-type photoelectric smoke detector according to the present invention.

[0023] Figure 6 This is an enlarged view of point A of a point-type photoelectric smoke detector according to this utility model.

[0024] 1-Mounting base, 2-Fixing plate, 3-Mounting hole, 4-Positioning ring, 5-Housing shell, 6-Top cover, 7-First vent hole, 8-Second vent hole, 9-Protective cover, 10-Detector, 11-First positioning shaft, 12-Second positioning shaft, 13-Positioning sleeve, 14-Circuit board, 15-Through groove, 16-Positioning plate, 17-Positioning block, 18-Fixing block, 19-Indicator light, 20-First limit sleeve, 21-Second limit sleeve, 22-Dustproof net, 23-Card plate, 24-Guide groove, 25-Positioning groove, 26-Card slot. Detailed Implementation

[0025] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1-6 As shown, this utility model provides a point-type photoelectric smoke detector, the installation process of which is as follows:

[0027] First, fix the mounting base 1 at the location where the detector needs to be installed, such as on the ceiling. Then, install the protective cover 9 on the mounting base 1 to protect the detector 10. Next, install the circuit board 14 at the center of the bottom of the mounting base 1 and electrically connect the indicator light 19 and the detector 10 to the circuit board 14.

[0028] Next, the positioning ring 4 is installed on the mounting base 1. When installing the housing 5, the first limiting sleeve 20 and the second limiting sleeve 21 on the inner wall of the housing 5 are aligned with the first positioning shaft 11 and the second positioning shaft 12 at the bottom of the mounting base 1, respectively. Then, the housing 5 is pushed upward so that the first positioning shaft 11 and the second positioning shaft 12 are inserted into the first limiting sleeve 20 and the second limiting sleeve 21, respectively, to achieve the initial positioning of the housing 5 and the mounting base 1.

[0029] At the same time, the fixing block 18 on the inner wall of the housing 5 is aligned with the positioning sleeve 13 at the bottom of the mounting base 1, and the fixing block 18 is inserted into the positioning sleeve 13 to further enhance the connection stability between the housing 5 and the mounting base 1.

[0030] Next, align the positioning block 17 with the guide groove 24 on the positioning ring 4, and then continue to push the housing 5 upward. The positioning block 17 will slide along the guide groove 24. When the positioning block 17 reaches the bottom of the guide groove 24, rotate the housing 5 so that the positioning block 17 is inserted into the positioning groove 25, thereby achieving a firm connection between the housing 5 and the positioning ring 4.

[0031] Finally, align the card plate 23 at the outer edge of the dustproof net 22 with the card slot 26 on the inner wall of the top cover 6, and install the dustproof net 22 inside the top cover 6. Then, install the top cover 6 on the positioning ring 4 to complete the installation of the entire detector.

[0032] The working principle of this device is as follows:

[0033] When a fire occurs, the smoke produced will enter the interior of the top cover 6 through the first vent 7 on the top cover 6. Due to the presence of the dustproof net 22, the dust will be blocked on the outside of the dustproof net 22, while the smoke can continue to enter the interior of the housing 5 through the dustproof net 22.

[0034] After the smoke enters the housing 5, it will reach the position of the detector 10 through the second vent 8. The detector 10 adopts the photoelectric smoke sensing principle. When the smoke particles enter the detector chamber, they will scatter the light, causing the intensity of the light received by the photoelectric sensor to change.

[0035] The photoelectric sensor converts changes in light intensity into electrical signals and transmits these signals to the circuit board 14. The circuit board 14 processes and analyzes the electrical signals. When the detected smoke concentration exceeds the set threshold, the circuit board 14 triggers the indicator light 19 to light up and simultaneously sends an alarm signal to the external fire alarm system to remind people to take timely fire extinguishing and evacuation measures.

[0036] This utility model of a point-type photoelectric smoke detector has good industrial applicability. Its structure is reasonably designed, and each component can be mass-produced using molds. The production process is simple and the cost is low. At the same time, the detector is very convenient to install and maintain, and can be operated without professional technicians, making it easy to be widely used in various places.

[0037] Furthermore, the detector of this invention has advantages such as high sensitivity and high reliability, and can detect fire smoke in a timely and accurate manner, providing strong protection for people's lives and property. Therefore, the detector has broad application prospects and market potential in the fire protection equipment market.

[0038] In summary, the point-type photoelectric smoke detector of this invention solves the problems of traditional detectors through reasonable structural design. It has the advantages of excellent dustproof performance, stable and reliable positioning, timely and accurate detection, and convenient installation and maintenance. It has important practical value and promising prospects for industrial application.

[0039] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A point-type photoelectric smoke detector, comprising a mounting base (1) and a housing (5), characterized in that: A positioning ring (4) is installed on the mounting base (1), and the housing is installed inside the positioning ring (4). A hollow hemispherical top cover (6) is installed on the positioning ring. A first vent hole (7) is opened on the top cover (6). A second vent hole (8) is opened at the top of the housing (5). A detector (10) corresponding to the second vent hole (8) is installed inside the housing (5). The housing (5) and the mounting base (1) are positioned by a limiting mechanism. An indicator light (19) is installed at the top of the housing (5).

2. The point-type photoelectric smoke detector as described in claim 1, characterized in that: A dustproof net (22) is installed inside the top cover (6). A slot (26) is provided on the inner wall of the top cover (6). A card plate (23) is installed at the outer edge of the dustproof net (22). The card plate (23) is engaged with the inner wall of the slot (26).

3. A point-type photoelectric smoke detector as described in claim 1, characterized in that: The first limiting sleeve (20) and the second limiting sleeve (21) are symmetrically installed on the inner wall of the housing (5). The first positioning shaft (11) and the second positioning shaft (12) are symmetrically installed at the bottom end of the mounting base (1). The first positioning shaft (11) and the second positioning shaft (12) are respectively adapted to the first limiting sleeve (20) and the second limiting sleeve (21).

4. A point-type photoelectric smoke detector as described in claim 1, characterized in that: A protective cover (9) is installed on the mounting base (1), and the protective cover (9) is used to protect the detector (10).

5. A point-type photoelectric smoke detector as described in claim 1, characterized in that: The bottom end of the mounting base (1) is symmetrically equipped with positioning sleeves (13), and the inner wall of the housing (5) is symmetrically equipped with fixing blocks (18) that are adapted to the positioning sleeves (13).

6. A point-type photoelectric smoke detector as described in claim 1, characterized in that: A circuit board (14) is installed at the center of the bottom of the mounting base (1), and the indicator light (19) and the detector (10) are electrically connected to the circuit board (14).

7. A point-type photoelectric smoke detector as described in claim 1, characterized in that: The limiting mechanism includes a plurality of guide grooves (24) evenly opened on the positioning ring (4), and a positioning groove (25) is opened at the bottom end of the guide groove (24). The outer surface of the housing (5) is evenly opened with the same number of through grooves (15) as the guide grooves (24). A positioning plate (16) capable of elastic deformation is installed on the inner wall of the through groove (15). A positioning block (17) adapted to the positioning groove (25) is installed on the positioning plate (16).

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