CN112562249A

CN112562249A - Smoke induction device

Info

Publication number: CN112562249A
Application number: CN202011454824.8A
Authority: CN
Inventors: 洪明权; 杨昌辉; 杨帅
Original assignee: Shenzhen Qianhai Aoruina Safety Technology Co ltd
Current assignee: Shenzhen Qianhai Aoruina Safety Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-03-26

Abstract

The invention discloses a smoke sensing device which comprises a shell and a disc seat fixedly installed on a ceiling, wherein the shell is detachably matched with the disc seat, a PCB is fixed in the shell, a smoke sensor is arranged on the PCB, the diameter of the shell is larger than that of the disc seat, a conical transition part is formed at the joint of the shell and the disc seat, the conical transition part is hollow, and a smoke inlet of a smoke alarm faces the conical transition part. The invention is beneficial to guiding smoke into the shell, thereby improving the accuracy and reliability of smoke detection.

Description

Smoke induction device

Technical Field

The invention relates to an inductor for fire fighting, in particular to a smoke induction device.

Background

In a fire fighting system, a smoke sensing device is an important facility for collecting smoke states and is generally installed on an indoor ceiling of a building, a smoke inlet is generally formed in the periphery of a shell or at the lower end of the shell of an existing smoke sensor, under many conditions, smoke can spread along the ceiling, and the smoke sensor is difficult to timely and accurately detect the smoke due to the fact that the smoke inlet of the smoke sensor is located below the ceiling, and detection accuracy is insufficient. In addition, the existing smoke sensor only has the capacity of smoke detection, when smoke occurs at a certain position, a control system can only be wanted to feed back a detection signal, and a monitoring person cannot know the specific situation of a site through visual observation, so that the existing smoke sensor lacks the remote monitoring capacity and is difficult to meet the application requirement.

Disclosure of Invention

The invention aims to solve the technical problem of providing a smoke sensing device which is beneficial to guiding smoke into a shell so as to improve the accuracy and reliability of smoke detection, aiming at the defects of the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme.

The utility model provides a smoke induction system, its is including casing and fixed mounting dish seat on the ceiling, the casing with the cooperation can be dismantled to the dish seat, the casing internal fixation has the PCB board, be equipped with smoke transducer on the PCB board, the diameter of casing is greater than the diameter of dish seat, just the casing with the junction of dish seat is formed with taper transition portion, taper transition portion is the fretwork form, smoke alarm's the mouth that advances orientation taper transition portion.

Preferably, a plurality of strip-shaped slotted holes arranged in parallel are formed in the conical transition portion, and the strip-shaped slotted holes are uniformly distributed along the circumferential direction of the conical transition portion.

Preferably, a surface cover is fixed at one end of the shell far away from the disk seat.

Preferably, a camera is arranged on the PCB, a window is arranged on the face cover, and the camera and the window are aligned with each other.

Preferably, be fixed with vertical axis and gear motor in the casing, the cover is equipped with axle sleeve and the two normal running fit on the vertical axis, the edge of axle sleeve is formed with outside extension's baffle and sector gear, be fixed with drive gear on gear motor's the output shaft, drive gear with the tooth intermeshing at sector gear edge, borrow by drive gear with sector gear's transmission cooperation makes gear motor orders about axle sleeve forward or reverse rotation, and then drives the baffle shelter from in the camera with between the window, perhaps follow the camera with shift out between the window.

Preferably, a camera jacket is fixed in the shell, and the camera is arranged in the camera jacket.

Preferably, the vertical height of the camera is smaller than or equal to the vertical height of the camera outer sleeve.

Preferably, when the baffle is shielded between the camera and the window, the baffle covers the opening of the camera outer sleeve.

Preferably, the camera outer sleeve and the baffle are both circular.

Preferably, a plurality of LED lamp beads are arranged on the PCB, and the LED lamp beads are uniformly distributed along the edge of the PCB.

In the smoke sensing device disclosed by the invention, the hollow conical transition part is formed at the joint of the upper end of the shell and the disc seat, the conical transition part can be used for entering smoke, when smoke is generated indoors, the smoke generally diffuses along a ceiling, and the hollow conical transition part is close to the disc seat, so that the smoke around the ceiling enters the shell through the hollow holes of the conical transition part, and the smoke inlet of the smoke alarm faces the conical transition part, so that the smoke can be detected in time.

Drawings

FIG. 1 is a first perspective view of a smoke sensing device;

FIG. 2 is a second perspective view of the smoke sensing device;

figure 3 is a first exploded view of the smoke sensing device;

figure 4 is a cross-sectional view of the smoke sensing device;

FIG. 5 is a view showing the internal structure of the housing when the camera is closed;

FIG. 6 is a view showing the internal structure of the case when the camera is opened;

figure 7 is a second exploded view of the smoke sensing device;

FIG. 8 is a perspective view of the smoke sensor;

FIG. 9 is an exploded view of the smoke sensor;

FIG. 10 is a second exploded view of the smoke sensor;

FIG. 11 is a cross-sectional view of a smoke sensor;

FIG. 12 is a view showing the connection between the housing and the tray;

fig. 13 is a front view of the tray.

Detailed Description

The invention is described in more detail below with reference to the figures and examples.

Example one

This embodiment has proposed a smoke induction system, combines fig. 1 to fig. 13 to show, and it is including casing 1 and fixed mounting dish seat 2 on the ceiling, casing 1 with the cooperation can be dismantled to dish seat 2, casing 1 internal fixation has PCB board 3, be equipped with smoke transducer 4 on the PCB board 3, casing 1's diameter is greater than the diameter of dish seat 2, just casing 1 with the junction of dish seat 2 is formed with taper transition portion 5, taper transition portion 5 is the fretwork form, smoke alarm 4 advance the mouth orientation taper transition portion 5.

In the structure, the hollow-out conical transition part 5 is formed at the joint of the upper end of the shell 1 and the disc seat 2, the conical transition part 5 can be used for allowing smoke to enter, when smoke is generated indoors, the smoke generally diffuses along a ceiling, and the hollow-out conical transition part 5 is close to the disc seat 2, so that the smoke around the ceiling enters the shell 1 through the hollow-out holes of the conical transition part 5, and the smoke can be detected in time due to the fact that the smoke inlet of the smoke alarm 4 faces the conical transition part 5.

In order to introduce the smoke better, in this embodiment, the tapered transition portion 5 is provided with a plurality of parallel slotted holes 50, and the plurality of slotted holes 50 are uniformly distributed along the circumferential direction of the tapered transition portion 5.

Preferably, a surface cover 10 is fixed to an end of the housing 1 away from the tray 2.

Further, a camera 30 is arranged on the PCB 3, a window 11 is arranged on the face cover 10, and the camera 30 and the window 11 are aligned with each other.

In this embodiment, a vertical shaft 13 and a reduction motor 17 are fixed in the housing 1, a shaft sleeve 14 is sleeved on the vertical shaft 13, the shaft sleeve and the shaft sleeve are in running fit, a baffle 15 and a sector gear 16 which extend outwards are formed at the edge of the shaft sleeve 14, a driving gear 18 is fixed on an output shaft of the reduction motor 17, the driving gear 18 and teeth at the edge of the sector gear 16 are meshed with each other, and the reduction motor 17 drives the shaft sleeve 14 to rotate forward or backward by means of the transmission fit of the driving gear 18 and the sector gear 16, so as to drive the baffle 15 to be shielded between the camera 30 and the window 11, or move out from the camera 30 and the window 11.

In the structure, the shell body 1 is internally provided with the camera 30, when the smoke sensing device feeds back a smoke detection signal to the main monitoring system, a monitoring person can acquire an indoor actual condition through the camera 30, so that the fire fighting state of a monitoring area can be comprehensively known, and reasonable measures can be adopted. On the basis, the driving gear 18 is in transmission fit with the sector gear 16, the speed reduction motor 17 can be used for driving the baffle plate 15 to move back and forth, so that the camera 30 can be shielded and opened, under the protection effect of the baffle plate 15, oil mist, dust and the like in a space can be prevented from being attached to a lens of the camera, and the baffle plate 15 can be opened only when video information needs to be acquired.

Preferably, a camera cover 31 is fixed in the housing 1, and the camera 30 is disposed in the camera cover 31.

Further, the vertical height of the camera 30 is less than or equal to the vertical height of the camera housing 31.

In this embodiment, when the baffle 15 is hidden between the camera 30 and the window 11, the baffle 15 covers the opening of the camera housing 31.

Based on the baffle 15 with the cooperation of camera overcoat 31, can with camera 30 shelter from in the baffle 15 with the enclosure space that camera overcoat 31 formed, can promote the guard action to the camera greatly from this.

Preferably, the camera housing 31 and the baffle 15 are both circular.

In order to realize the light prompt function, in this embodiment, be equipped with a plurality of LED lamp pearls 32 on the PCB board 3, a plurality of LED lamp pearls 32 are followed the marginal evenly distributed of PCB board 3.

Example two

In practical application, the smoke sensing device generally adopts an infrared geminate transistor mode to realize smoke detection, a labyrinth is required to be arranged at the detection end of the infrared geminate transistor in the structure, and when smoke enters the labyrinth, the infrared geminate transistor can timely sense smoke particles. However, smoke is not uniformly distributed, and generally, the smoke flows in a strand, when a strand of smoke enters the labyrinth, although the smoke is in the labyrinth, the strand of smoke is likely to avoid the detection area of the infrared pair tube, which causes a condition that the smoke is present in the labyrinth but cannot be detected, thereby reducing the detection accuracy and reliability of the smoke sensing device.

In this regard, the present embodiment proposes a labyrinth type smoke sensor, as shown in conjunction with figures 8 to 11, the smoke sensor 4 comprises a bottom cover 40 and an upper cover 41, a cylindrical side wall 42 extending downwards is formed at the edge of the upper cover 41, the bottom cover 40 covers the lower opening of the cylindrical side wall 42, an inner cylinder 43 is formed on the upper cover 41, the inner cylinder 43 is located inside the cylindrical side wall 42 with an annular gap 44 therebetween, an infrared emitter 400 and an infrared receiver 401 are arranged on the bottom cover 40 in a penetrating way, the infrared emitter 400 and the infrared receiver 401 are arranged in an inverted V shape, and the transmitting end of the infrared transmitter 400 and the receiving end of the infrared receiver 401 both face the inner cavity of the inner barrel 43, a bottom gap 45 for introducing smoke is formed between the inner cylinder 43 and the bottom cover 40, and the cylindrical side wall 42 is in a grid shape.

In the above smoke sensor, a cylindrical side wall 42 is provided between the upper cover 41 and the bottom cover 40, an inner cylinder 43 is provided inside the cylindrical side wall 42, a labyrinth structure is formed by the combination of the upper cover 41, the bottom cover 40, the inner cylinder 43 and the bottom cover 40, and smoke entering the inner cylinder 43 is detected by the cooperation of the infrared emitter 400 and the infrared receiver 401, wherein, since the cylindrical side wall 42 is in a mesh shape, when smoke enters the annular gap 44 and the inner cylinder 43 through the cylindrical side wall 42, the smoke is scattered by the cylindrical side wall 42 in the mesh shape, so that the smoke in the annular gap 44 and the inner cylinder 43 is more uniform, and even if external smoke flows in a jet, the smoke is uniformly diffused to the annular gap 44 and the inner cylinder 43 after passing through the mesh, and since the internal smoke is uniformly distributed, the infrared pair transistors can detect smoke more timely and accurately, and the detection accuracy and reliability of the smoke sensing device are greatly improved.

In order to further improve the smoke detection accuracy, in the present embodiment, a plurality of vertical triangular ribs 430 parallel to each other are formed on the inner wall of the inner cylinder 43, and the plurality of vertical triangular ribs 430 are uniformly distributed along the circumferential direction of the inner cylinder 43.

Further, a plurality of parallel lateral triangular ribs 410 are formed on the upper cover 41 inside the inner cylinder 43.

The vertical triangular ribs 430 and the horizontal triangular ribs 410 help to reduce reflection of infrared light, and prevent false detection.

In order to better realize the combination, in this embodiment, a plurality of vertical supporting blocks 402 are formed on the bottom cover 40, the vertical supporting blocks 402 are uniformly distributed along the circumferential direction of the bottom cover 40, the cylindrical side wall 42 is sleeved outside the vertical supporting blocks 402, and the cylindrical side wall 42 is tightly matched with the vertical supporting blocks 402.

In order to further strengthen the connection relationship, in this embodiment, two symmetrically disposed vertical supporting blocks 402 are respectively formed with inserting columns 403, and the inserting columns 403 penetrate through the upper cover 41 and are tightly fitted with each other.

EXAMPLE III

In practical application, smoke induction system is in order to simplify the installation step and conveniently lay work, generally can install the chassis in advance on the ceiling, then install the casing on the chassis with revolving to twist, the contact and the shell fragment of butt each other carry out electric connection in the junction on casing and chassis, but in current product, contact and shell fragment are range upon range of from top to bottom generally, forward contact, realize the elasticity butt with the help of the pressure between casing and the chassis between the two, because of the pressure between casing and the chassis is great, under long-term service condition, the shell fragment is tired very easily, lead to the elastic capacity of shell fragment to reduce, and then the condition of shell fragment and contact failure appears, the fault rate is higher, be difficult to satisfy the application demand.

To this end, the present embodiment provides an electrical connection mechanism of a smoke sensor, as shown in fig. 3, 12 and 13, the smoke sensor includes a housing 1 and a tray base 2 fixedly installed on a ceiling, a metal post 100 penetrates through a top surface of the housing 1, a post clamping device 200 is disposed on the tray base 2, the post clamping device 200 includes a first metal elastic sheet 201 and a second metal elastic sheet 202 which are arranged side by side, the first metal elastic sheet 201 and the second metal elastic sheet 202 are both vertically fixed on the tray base 2, a contact clip 203 for clamping the metal post 100 is formed between the first metal elastic sheet 201 and the second metal elastic sheet 202, a V-shaped socket 204 is formed between an end of the first metal elastic sheet 201 and an end of the second metal elastic sheet 202, and when assembling, the metal post 100 is aligned with the V-shaped socket 204, then, the housing 1 is screwed, the metal plug 100 slides into the contact clip opening 203 through the V-shaped socket 204, and the metal plug 100 is clamped by the elastic clamping force between the first metal spring piece 201 and the second metal spring piece 202, so that the metal plug 100 and the plug clamping device 200 are electrically connected.

In the above structure, the top surface of the housing 1 is provided with the vertically extending metal insert column 100, and the base 2 is provided with the insert column clamping device 200 comprising the first metal elastic sheet 201 and the second metal elastic sheet 202, so that when the metal insert column 100 slides into the space between the first metal elastic sheet 201 and the second metal elastic sheet 202, the metal insert column can be tightly contacted with the metal insert column 100 under the clamping action of the first metal elastic sheet 201 and the second metal elastic sheet 202. In addition, in the assembling process, the metal plug 100 is aligned with the V-shaped socket 204, and then the housing 1 is screwed, so that the installation process is simpler, and the metal plug 100 can be matched with the first metal elastic sheet 201 and the second metal elastic sheet 202 more easily, which is beneficial to improving the installation efficiency.

As a preferable mode, two or more metal inserting columns 100 penetrate through the top surface of the housing 1, two or more inserting column clamping devices 200 are arranged on the tray 2, and the metal inserting columns 100 correspond to the inserting column clamping devices 200 one to one.

Further, an annular flange 205 is formed at the edge of the seat 2, and the post clamp device 200 is located inside the annular flange 205.

In order to enable the housing 1 to be well fastened with the tray 2, in this embodiment, an inner edge 206 is formed on the inner side of the annular flange 205, an avoiding opening 207 is formed on the inner edge 206, an inverted "L" shaped buckle 102 is formed on the top surface of the housing 1, the buckle 102 passes through the avoiding opening 207, when the housing 1 is screwed, the buckle 102 slides relative to the inner edge 206, and the buckle 102 is fastened on the inner side of the inner edge 206.

In order to further improve the elastic capability of the elastic piece, in this embodiment, the second metal elastic piece 202 is curved.

As a preferable mode, the first metal elastic sheet 201 and the second metal elastic sheet 202 are respectively fixed on the tray base 2 by screws.

In order to further improve the clamping capability between the first metal dome 201 and the second metal dome 202, in this embodiment, vertical reinforcing plates 209 are respectively disposed on the outer sides of the first metal dome 201 and the second metal dome 202, and the vertical reinforcing plates 209 and the tray base 2 are integrally formed.

In the above structure, when the first metal dome 201 and the second metal dome 202 are outwardly opened to a certain extent and contact the vertical reinforcing plate 209, the vertical reinforcing plate 209 may be utilized to provide a certain reaction force to the metal domes, so as to enhance the elastic clamping force between the two, and ensure the reliability of the electrical connection relationship.

As a preferred structure, the metal insert 100 has a long block shape.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a smoke induction system, its characterized in that, including casing (1) and fixed mounting dish seat (2) on the ceiling, casing (1) with the cooperation can be dismantled in dish seat (2), casing (1) internal fixation has PCB board (3), be equipped with smoke transducer (4) on PCB board (3), the diameter of casing (1) is greater than the diameter of dish seat (2), just casing (1) with the junction of dish seat (2) is formed with taper transition portion (5), taper transition portion (5) are the fretwork form, smoke alarm (4) advance the mouth towards taper transition portion (5).

2. The smoke sensing device according to claim 1, wherein said conical transition portion (5) is formed with a plurality of slotted holes (50) arranged in parallel, said plurality of slotted holes (50) being uniformly distributed along a circumferential direction of said conical transition portion (5).

3. A smoke sensing device according to claim 2, wherein a face cover (10) is secured to the end of the housing (1) remote from the base (2).

4. A smoke sensing device according to claim 3, wherein said PCB board (3) is provided with a camera (30), said face cover (10) is provided with a window (11), and said camera (30) and said window (11) are aligned with each other.

5. Smoke sensing device according to claim 4, where in the housing (1) a vertical shaft (13) and a reduction motor (17) are fixed, the vertical shaft (13) is sleeved with a shaft sleeve (14) which is in running fit with the shaft sleeve, a baffle plate (15) and a sector gear (16) which extend outwards are formed at the edge of the shaft sleeve (14), a driving gear (18) is fixed on an output shaft of the speed reducing motor (17), the driving gear (18) is meshed with teeth at the edge of the sector gear (16), and the speed reducing motor (17) drives the shaft sleeve (14) to rotate forwards or reversely by the transmission fit of the driving gear (18) and the sector gear (16), thereby driving the baffle (15) to be shielded between the camera (30) and the window (11), or out of between the camera (30) and the window (11).

6. A smoke sensing device according to claim 5, wherein a camera housing (31) is fixed inside said housing (1), said camera (30) being arranged inside said camera housing (31).

7. A smoke sensing device according to claim 6, wherein the vertical height of said camera (30) is less than or equal to the vertical height of said camera housing (31).

8. A smoke sensing device according to claim 6, wherein said barrier (15) covers the opening of said camera housing (31) when said barrier (15) is concealed between said camera (30) and said window (11).

9. A smoke sensing device according to claim 8, wherein said camera housing (31) and said baffle (15) are both circular.

10. A smoke sensing device according to claim 1, wherein said PCB (3) is provided with a plurality of LED beads (32), said plurality of LED beads (32) being evenly distributed along the edge of said PCB (3).