CN218525178U

CN218525178U - Linear light beam smoke fire detector

Info

Publication number: CN218525178U
Application number: CN202222694759.7U
Authority: CN
Inventors: 王永刚; 李敏智
Original assignee: Zhongshan Guangwei Fire Equipment Technology Co ltd
Current assignee: Zhongshan Guangwei Fire Equipment Technology Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-02-24
Anticipated expiration: 2032-10-13

Abstract

The utility model relates to a linear beam smoke fire detector, including the detector casing, the inside infrared light ware that receives that is equipped with of detector casing, infrared light ware that receives includes the infrared ray receiver tube and establishes the first long burnt battery of lens in infrared ray receiver tube the place ahead, first long burnt battery of lens include first convex lens piece and with the first concave lens piece that first convex lens piece interval set up. The utility model is characterized in that: compare in traditional single face convex lens and carry out the focus of light signal, the utility model discloses a long burnt battery of lens that first convex lens piece and the first concave lens piece that sets up with first convex lens piece interval are constituteed carries out signal reception, improves infrared receiver's signal reception precision, reduces the infrared signal interference of different angles to improve the effective working distance of product.

Description

Linear light beam smoke fire detector

Technical Field

The utility model relates to a fire-fighting equipment technical field specifically is a smoke fire detector is felt to linear light beam.

Background

The linear beam smoke fire detector generally uses an infrared light emitter to emit an infrared beam, and an infrared receiver receives the infrared beam through a reflector or a straight alignment mode. When a fire disaster happens around the detector, smoke generated by the fire disaster is diffused to the light path of the detector, the light quantity of light beams emitted to the infrared receiver by the infrared illuminator is reduced, and the detector generates an alarm signal, so that the automatic detection and alarm at the initial stage of the fire disaster are achieved.

The conventional line-type beam smoke fire detector generally receives signals through a single-sided convex lens. Since the single-sided convex lens has a low requirement on the refraction angle of light, the interference signal reflected from the side surface is easily received by the infrared receiver. Although a signal source of infrared emission of the detector is generally provided with a carrier wave with a certain frequency in a circuit design, filtering can be processed to a certain extent during receiving, but an interference signal can also improve a direct current component of a signal received by the infrared receiver, so that the amount of a processable infrared signal is reduced, and the strength of the processable signal is influenced. Under the influence, the detection distance of the traditional linear beam smoke-sensitive fire detector is generally 5 m-100 m, and when the detection distance exceeds 100m, the detector has the problems of reduced alarm sensitivity and even missed alarm.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can improve line type light beam smoke sensing fire detector of infrared receiver received signal precision, the infrared signal through reducing different angles disturbs the effective operating distance in order to promote the detector.

In order to solve the technical problem, the utility model provides a following technical scheme:

the utility model provides a linear beam smoke fire detector, includes the detector casing, the inside infrared light receiver that is equipped with of detector casing, infrared light receiver includes the infrared ray receiver tube and establishes the first long burnt battery of lens in infrared ray receiver tube the place ahead, first long burnt battery of lens include first convex lens piece and with the first concave lens piece that first convex lens piece interval set up, first concave lens piece is located between first convex lens piece and the infrared ray receiver tube.

As a further optimization scheme of the utility model, the inside infrared illuminator that still is equipped with of detector casing, infrared illuminator includes infrared emission pipe and establishes the long burnt battery of lens in the second in infrared emission pipe the place ahead, the long burnt battery of lens of second include the second convex lens piece and with the second concave lens piece that the second convex lens piece interval set up, the second concave lens piece is located between second convex lens piece and the infrared emission pipe.

As a further optimization scheme of the present invention, the first convex lens sheet, the first concave lens sheet, the second convex lens sheet and the second concave lens sheet are glass spherical lenses.

As a further optimization scheme of the utility model, the inside battery of lens casing that still is equipped with of detector casing, first long burnt battery of lens and second long burnt battery of lens all establish in the battery of lens casing.

As a further preferred embodiment of the present invention, the lens module casing includes at least two hollow circular tube-shaped cavities, and the circular tube-shaped cavities are provided with lens mounting grooves for fixing the lenses.

As the utility model discloses further optimization scheme, the battery of lens casing include the battery of lens epitheca and with the battery of lens epitheca corresponding battery of lens inferior valve, be equipped with detachable connection structure between battery of lens epitheca and the battery of lens inferior valve.

As the utility model discloses further optimization scheme, the inside signal processing mainboard that still is equipped with of detector casing, infrared transmitting tube and infrared ray receiver tube are all established on the signal processing mainboard.

Compared with the prior art, the utility model discloses there is following advantage: compare in traditional single face convex lens and carry out the focus of light signal, the utility model discloses a long burnt battery of lens that first convex lens piece and the first concave lens piece that sets up with first convex lens piece interval are constituteed carries out signal reception, improves infrared receiver's signal reception precision, reduces the infrared signal interference of different angles to improve the effective working distance of product.

Drawings

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is an exploded view of a lens assembly according to the present invention;

fig. 4 is a schematic view of a full section and a light path of the intermediate infrared light receiver of the present invention;

FIG. 5 is a schematic view of a full section and light path of the mid-infrared illuminator of the present invention;

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The utility model provides a linear beam smoke fire detector, includes detector casing 1, detector casing 1 is inside to be equipped with infrared light receiver 2, infrared light receiver 2 includes infrared ray receiver tube 21 and establishes the first long burnt battery of lens 22 in infrared ray receiver tube 21 the place ahead, first long burnt battery of lens 22 includes first convex lens piece 221 and the first concave lens piece 222 that sets up with first convex lens piece 221 interval, first concave lens piece 222 is located between first convex lens piece 221 and the infrared ray receiver tube 21. The detector shell 1 can be provided with a bracket assembly convenient for installation and adjustment. When the fire detector is used, the detector shell 1 can be installed to a working position in a fixing mode such as bolt connection, an infrared transmitter is installed at a position away from the fire detector, the fire detector is aligned to the infrared transmitter, and the infrared light beam emitted by the infrared transmitter can be received by the infrared light receiver 2; or the infrared transmitter can be arranged in the fire detector, after the fire detector is arranged to the working position, the reflector is arranged at a position having a certain distance with the fire detector, and the reflector is aligned with the fire detector and the reflector, so that infrared beams can reach the infrared light receiver 2 through the reflector after the infrared transmitter sends out infrared beams. In practical design, the focal power of the first telephoto lens group 22 needs to be designed according to the parameters of the infrared emitting LED, the parameters of the infrared receiving detector and the detection distance. In the first telephoto lens group 22, the first convex lens sheet 221 primarily focuses the optical signal and converges the optical signal onto the first concave lens sheet 222, and the first concave lens sheet 222 secondarily focuses the optical signal and finally converges the optical signal onto the focus B. The interference signal reflected from the side surface passes through the first convex lens 221 and then reaches only the vicinity of the focus a, but cannot reach the focus B through the first concave lens 222, thereby completing the screening of the interference signal. Through the mutual cooperation of first convex lens piece 221 and first concave lens piece 222, improved the refraction angle requirement to light signal, interference signal that the side reflection came is difficult to reach infrared ray receiver tube 21 behind the multilayer lens, and the infrared beam of infrared transmitter transmission through the straight line counterpoint, or the influence that infrared beam that reflects back from the front through the reflector received is less, thereby improve infrared ray receiver tube 21's signal reception precision, reduce the infrared signal interference of different angles, improve the effective functioning distance of product.

The inside infrared illuminator 4 that still is equipped with of detector casing 1, infrared illuminator 4 includes infrared emission tube 41 and establishes the long burnt lens system 42 of second in infrared emission tube 41 the place ahead, long burnt lens system 42 of second includes second convex lens piece 421 and with the second concave lens piece 422 of second convex lens piece 421 interval setting, second concave lens piece 422 is located between second convex lens piece 421 and the infrared emission tube 41. The infrared light beams emitted by the infrared emission tube 41 are efficiently irradiated onto the reflection plate through the second convex lens 421 and the second concave lens 422, and the collimation degree of the light beams during output is effectively improved.

The first convex lens plate 221, the first concave lens plate 222, the second convex lens plate 421 and the second concave lens plate 422 are all glass spherical lenses. Compared with an aspheric lens, the spherical lens which is easier to manufacture can ensure good manufacturability, and the requirement of mass production of products is met.

The detector shell 1 is also internally provided with a lens group shell 5, and the first long focus lens group 22 and the second long focus lens group 42 are both arranged in the lens group shell 5. The first long focus lens group 22 and the second long focus lens group 42 are fixed through the lens group shell 5, and when other parts of the detector are overhauled, the detector shell 1 is opened, so that the fixation of the lens group shell 5 to the first long focus lens group 22 and the second long focus lens group 42 is not influenced, and the detector is convenient to overhaul.

The lens group housing 5 comprises at least two hollow circular tube-shaped cavities 51, and the circular tube-shaped cavities 51 are provided with lens mounting grooves 511 for fixing lenses. The lens is fixed through the lens mounting groove 511 of the circular tube-shaped cavity 51, and the fixing device is simple and convenient.

The lens set housing 5 comprises a lens set upper shell 52 and a lens set lower shell 53 corresponding to the lens set upper shell 52, and a detachable connection structure is arranged between the lens set upper shell 52 and the lens set lower shell 53. Detachable connection structure specifically can be for connection modes such as buckle connection, plug-in connection, magnetism are inhaled and are connected, constitutes battery of lens casing 5, the installation lens of being convenient for through battery of lens epitheca 52 and battery of lens inferior valve 53.

The detector shell 1 is also internally provided with a signal processing mainboard 3, and the infrared transmitting tube 41 and the infrared receiving tube 21 are both arranged on the signal processing mainboard 3. The signal processing main board 3 may be a PCB, and the signal processing main board 3 controls the operation of the infrared transmitting tube 41 and processes the signal received by the infrared receiving tube 21.

The following is an example of a linear beam smoke fire detector for the purpose of detecting a distance of 160 m.

In an embodiment, the combined focal length f =150mm, the first convex lens power f1=50mm, the first concave lens power f2= -75 mm of the first tele lens group; and the combined focal length f =150mm of the second long-focus lens group, the focal power f1=50mm of the second convex lens piece, and the focal power f2= -75 mm of the second concave lens piece. Practical design parameters of the example are as follows, where S1 is the outer face of the first convex lens sheet, S2 is the inner face of the first convex lens sheet, S3 is the outer face of the first concave lens sheet, S4 is the inner face of the first concave lens sheet, S5 is the outer face of the second convex lens sheet, S6 is the inner face of the second convex lens sheet, S7 is the outer face of the second concave lens sheet, and S8 is the inner face of the second concave lens sheet:

Claims

1. the utility model provides a linear beam smoke fire detector which characterized in that: including detector casing (1), inside infrared light ware (2) of receiving that is equipped with of detector casing (1), infrared light ware (2) of receiving includes infrared ray receiver tube (21) and establishes first long burnt battery of lens (22) in infrared ray receiver tube (21) the place ahead, first long burnt battery of lens (22) include first convex lens piece (221) and with first convex lens piece (221) interval first concave lens piece (222) that set up, first concave lens piece (222) are located between first convex lens piece (221) and infrared ray receiver tube (21).

2. The linear beam smoke fire detector as claimed in claim 1, wherein: the detector shell (1) is inside still to be equipped with infrared illuminator (4), infrared illuminator (4) include infrared emission pipe (41) and establish second long burnt battery of lens (42) in infrared emission pipe (41) the place ahead, second long burnt battery of lens (42) include second convex lens piece (421) and with second convex lens piece (421) second concave lens piece (422) that the interval set up, second concave lens piece (422) are located between second convex lens piece (421) and infrared emission pipe (41).

3. A line beam smoke fire detector as defined in claim 2, wherein: the first convex lens sheet (221), the first concave lens sheet (222), the second convex lens sheet (421) and the second concave lens sheet (422) are all glass spherical lenses.

4. A linear beam smoke fire detector as claimed in claim 3, wherein: the detector is characterized in that a lens group shell (5) is further arranged inside the detector shell (1), and the first long-focus lens group (22) and the second long-focus lens group (42) are both arranged in the lens group shell (5).

5. The linear beam smoke fire detector as claimed in claim 4, wherein: the lens group shell (5) comprises at least two hollow circular tube-shaped cavities (51), and lens mounting grooves (511) for fixing lenses are formed in the circular tube-shaped cavities (51).

6. A linear beam smoke fire detector as claimed in any one of claims 4 or 5, wherein: the lens group shell (5) comprises a lens group upper shell (52) and a lens group lower shell (53) corresponding to the lens group upper shell (52), and a detachable connecting structure is arranged between the lens group upper shell (52) and the lens group lower shell (53).

7. A linear beam smoke fire detector as defined in claim 2, wherein: the detector is characterized in that a signal processing main board (3) is further arranged inside the detector shell (1), and the infrared transmitting tube (41) and the infrared receiving tube (21) are both arranged on the signal processing main board (3).