CN204331977U - New type smoke detector maze with lens - Google Patents

Abstract

The utility model provides a kind of Novel belt lens smoke sensing detector labyrinth, comprise labyrinth base and labyrinth upper cover, power valve, receiving tube are installed in the base of labyrinth, power valve, receiving tube are respectively by the soldering of printed boards of band components and parts drawing hole and labyrinth base dorsal part, convex lens are provided with in the front end of receiving tube, set up convex lens by the front end at receiving tube, thus improve the reliability of detector, stability and consistance.Be provided with circular hole in the center of described labyrinth upper cover, its fundamental purpose is the mobility in order to increase labyrinth measurement space smog, thus improves detector sensitivity further.In a word, the utility model novel structure, good looking appearance, and there is the features such as insect protected, dust-proof, anti-extraneous light interference, moisture resistance.

Description

New type smoke detector maze with lens

technical field

The utility model relates to a novel labyrinth smoke detector with a lens, which belongs to the technical field of fire alarm equipment.

Background technique

The maze is an important part of the point-type photoelectric smoke detector, which is usually composed of a maze base and a maze cover. A light emitting tube and a light receiving device are installed on the base of the maze. When a fire occurs, smoke will enter the maze. Due to the scattering effect of the smoke on the light, the red receiving tube receives a weak signal and passes through the amplification circuit. The signal is amplified, and the trigger circuit judges the threshold value of the amplified signal and sends out an alarm signal.

The photoelectric smoke detector mazes in the prior art, no matter whether the maze base (or the upper cover of the maze) is designed as a side-entry smoke form with a common flat bottom structure, or the labyrinth base is designed as a bucket-shaped structure with bottom-entry smoke form All have defects and deficiencies. The labyrinth in the form of side-entry smoke has simple structure, small volume but weak anti-interference ability. The labyrinth in the form of smoke entering from the bottom has high sensitivity and strong anti-interference ability, but the labyrinth is large in size, the upper cover process is complicated, and the installation is inconvenient.

Utility model content

In view of the above deficiencies, the utility model provides a new type of labyrinth smoke detector with a lens, which still has the characteristics of high sensitivity and strong anti-interference ability under the conditions of simple structure and small volume.

The technical scheme of the utility model: a new labyrinth smoke detector with a lens, including a labyrinth base and a labyrinth upper cover, and a launch tube and a receiver tube are installed in the labyrinth base, and the launch tube and the receiver tube pass through the guide hole and the back side of the labyrinth base respectively. The printed circuit board with components is welded, and a convex lens is arranged at the front end of the receiving tube.

A round hole is provided at the center of the upper cover of the labyrinth, the main purpose of which is to increase the fluidity of the smoke in the labyrinth measurement space, thereby further improving the sensitivity of the detector.

A shading column is arranged between the transmitting tube and the receiving tube. The transverse section of the shading column is L-shaped. One end of the shading column extends to the receiving tube, and the other end extends to the gap formed between the transmitting tube and the receiving tube, so as to prevent the transmitting tube from The emitted light shines directly on the surface of the receiving tube.

The base of the labyrinth and the upper cover of the labyrinth are both cylindrical, and the inner wall and bottom surface of the base of the labyrinth and the inner wall of the upper cover of the labyrinth are all shaped with zigzag light-shielding sheets to avoid interference caused by light reflection on the inner surface of the labyrinth shell.

Beneficial effects of the utility model: the utility model improves the reliability, stability and consistency of the detector by adding a convex lens at the front end of the receiving tube; Anti-interference of external light, anti-humidity and other characteristics.

Description of drawings

Fig. 1 is a structural schematic diagram of a labyrinth base of the present invention.

Fig. 2 is a structural schematic diagram of the upper cover of the labyrinth of the present invention.

Figure 3 is a front view of the convex lens.

Figure 4 is a side view of the convex lens.

Detailed ways

As shown in Fig. 1 and Fig. 2, the new labyrinth smoke detector with lens includes a maze base 1 and a labyrinth upper cover 10, and a measurement space is formed between the maze base 1 and the labyrinth upper cover 10. Wherein, the labyrinth base 1 and the labyrinth loam cake 10 are all cylindrical, and the inwall of the labyrinth base 1, the bottom surface and the inwall of the labyrinth loam cake 10 are all shaped on a zigzag light-shielding sheet 8, and in the center of the labyrinth loam cake 10 A circular hole 9 is provided at the place. A launch tube 2 and a receiver tube 6 are installed in the labyrinth base 1, and the receiver tube 6 is located in the shielding cover 5. The launch tube 2 and the receiver tube 6 pass through the lead holes and the printed board 3 with components on the back side of the labyrinth base 1 respectively. welding. A shading column 4 is arranged between the transmitting tube 2 and the receiving tube 6, and the transverse section of the shading column 4 is L-shaped, and one end thereof stretches toward the receiving tube 6, and the other end extends between the transmitting tube 2 and the receiving tube 6 to form a in the cracks. A convex lens 7 is provided at the front end of the receiving tube 6, as shown in Fig. 3 and Fig. 4 .

The utility model makes full use of the converging effect of the lens. Under normal (no smoke) conditions, the light emitted by the light source is condensed into a beam through the lens, irradiated on the receiving tube 6, and passes through the circuit (that is, the printed board 3 with components) Convert it into an electrical signal so that the entire circuit maintains a normal state and no alarm occurs; when there is smoke in a fire, the light emitted by the light source is scattered and absorbed by the smoke particles, which changes the propagation characteristics of the light, and the receiving tube 6 receives it. The light intensity is obviously weakened, the normal state of the circuit is destroyed, and then an alarm occurs.

Claims (4)

1. Novel belt lens smoke sensing detector labyrinth, comprise labyrinth base (1) and labyrinth upper cover (10), power valve (2), receiving tube (6) are installed in labyrinth base (1), power valve (2), receiving tube (6) weld with the printed board (3) of the band components and parts of labyrinth base (1) dorsal part respectively by drawing hole, it is characterized in that: be provided with convex lens (7) in the front end of receiving tube (6).

2. Novel belt lens smoke sensing detector labyrinth as claimed in claim 1, is characterized in that: be provided with circular hole (9) in the center in described labyrinth upper cover (10).

3. Novel belt lens smoke sensing detector labyrinth as claimed in claim 1, it is characterized in that: between described power valve (2), receiving tube (6), be provided with shading column (4), the lateral cross section of shading column (4) is L-shaped, receiving tube (6) is stretched in its one end, and the other end stretches in the crack formed between power valve (2) and receiving tube (6).

4. Novel belt lens smoke sensing detector labyrinth as claimed in claim 1, it is characterized in that: described labyrinth base (1) and labyrinth upper cover (10) are cylindrical, the inwall of the inwall in labyrinth base (1), bottom surface and labyrinth upper cover (10) is all shaped with serrate anti-dazzling screen (8).