CN210090257U

CN210090257U - Smoke sensing device

Info

Publication number: CN210090257U
Application number: CN201920342676.7U
Authority: CN
Inventors: 张森
Original assignee: Tongling Jingdian Optical Technology Co Ltd
Current assignee: Tongling Jingdian Optical Technology Co Ltd
Priority date: 2019-03-19
Filing date: 2019-03-19
Publication date: 2020-02-18
Anticipated expiration: 2029-03-19

Abstract

The utility model provides a smoke sensing device, including drain pan and one-way open-ended sensing room, the sensing room includes room bottom plate and room side bounding wall, the top and the room bottom plate of room side bounding wall are connected, the bottom of room side bounding wall is the bottom opening, this bottom opening is connected with the top surface of drain pan, the inside of sensing room is provided with just to the one that sets up, No. two optical fiber fixed stations, one, it has the interbay cavity to press from both sides between No. two optical fiber fixed stations, the smoke guide through-hole that the drain pan middle part was seted up is connected with the bottom of first, second insertion piece, the top of first, second insertion piece all contacts with room bottom plate, first insertion piece is located one, one side of No. two optical fiber fixed stations, second insertion piece is located the opposite side of No. one, the interbay cavity UNICOM of second optical fiber fixed station, the insertion cavity that presss from both sides between first, second insertion piece and interbay cavity UNICOM, and. The design has no potential safety hazard, is suitable for optical fiber smoke sensing, and has strong sealing property and good smoke gathering effect.

Description

Smoke sensing device

Technical Field

The utility model relates to a smog measurement technique especially relates to a smog sensing device, and the cigarette is felt to the optic fibre in the specially adapted ability, and avoids the potential safety hazard.

Background

At present, smoke detectors used for automatic fire alarm at home and abroad comprise a photoelectric type, an ionic type and an infrared beam (laser) type, electric signals are adopted as measurement mediums for smoke sensing in the detectors, and electronic components are also arranged in the detectors, so that the detectors are not suitable for being applied to places which are inflammable and explosive and have high electromagnetic radiation intensity, meanwhile, the electronic components are easy to age, and are easy to generate false alarm or even fail after aging, and in addition, the existing smoke sensing components are often complex in structure and large in size.

The above disadvantages of the prior art make it no longer suitable for the automatic fire alarm, and a new smoke sensing technology, such as optical fiber smoke sensing, is urgently needed, and meanwhile, in order to fully utilize the advantages of optical fiber smoke sensing, a specially designed smoke sensing device must be equipped.

The information disclosed in this background section is only for enhancement of understanding of the general background of the patent application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Disclosure of Invention

The utility model aims at overcoming the defect and the problem that exist the potential safety hazard among the prior art, be not suitable for the optic fibre to feel the cigarette, provide one kind do not exist the potential safety hazard, be applicable to the smog sensing device that the optic fibre felt the cigarette.

In order to achieve the above purpose, the technical solution of the utility model is that: a smoke sensing device; the sensing device comprises a bottom shell and a sensing chamber with a one-way opening, the sensing chamber comprises a chamber bottom plate and a chamber side enclosing plate, the top of the chamber side enclosing plate is connected with the chamber bottom plate, the bottom of the chamber side enclosing plate is provided with a bottom opening, the bottom opening is connected with the top surface of the bottom shell, a first optical fiber fixing table and a second optical fiber fixing table which are arranged oppositely are arranged in the sensing chamber, and a chamber cavity is formed between the first optical fiber fixing table and the second optical fiber fixing table;

the middle part of drain pan has been seted up and has been led the cigarette through-hole, should lead the cigarette through-hole and insert the piece with first, second and insert the bottom of piece and be connected, first inserts the piece, the top of second insert the piece and all contacts with room bottom plate, first inserts the piece and is located one side of an optic fibre fixed station, No. two optic fibre fixed stations, second inserts the piece and is located the opposite side of an optic fibre fixed station, No. two optic fibre fixed stations, insert the chamber and the inter-platform cavity UNICOM that press from both sides between first insert piece, second insert the piece, and lead the cigarette through-hole and communicate with each other with the inter-platform cavity behind inserting the chamber.

The edge of the opening of the bottom is connected with at least two chamber pins extending downwards; the drain pan is including being located the drain pan bottom plate in its middle part, and this drain pan bottom plate's middle part has been seted up and has been led the cigarette through-hole, has seted up around leading the cigarette through-hole on the drain pan bottom plate and has participated in the footing hole that carries out the plug-in connection with the room, and the area of drain pan bottom plate is greater than bottom open-ended area.

The bottom opening is lower than the bottoms of the first optical fiber fixing table and the second optical fiber fixing table.

The bottom that inserts the piece first, lead cigarette through-hole, second and insert the piece presss from both sides into a breach and No. two breachs just to setting up altogether, a breach clamping is on the bottom of an optic fibre fixed station, No. two breach clamping on the bottom of No. two optic fibre fixed stations, and the bottom of a breach, No. two breachs all contacts with the room bottom plate.

The first gap is located between the first inner end part and the first outer end part on the first optical fiber fixing table, the first gap is arranged close to the first inner end part, the second gap is located between the second inner end part and the second outer end part on the second optical fiber fixing table, and the second gap is arranged close to the second inner end part.

The two sides of the first insertion piece are respectively connected with a first sealing plate and a second sealing plate, the two sides of the second insertion piece are respectively connected with a second sealing plate and a second sealing plate, the first sealing plate and the second sealing plate are respectively contacted with the two sides of the first optical fiber fixing table, and the second sealing plate are respectively contacted with the two sides of the second optical fiber fixing table.

The first insertion sheet and the second insertion sheet are arc sheets protruding outwards relative to the circle center of the smoke guide through hole, and the distance between the first sealing plate and the second sealing plate are smaller than the maximum distance between the first insertion sheet and the second insertion sheet.

The drain pan still includes the drain pan side wall, the bottom of drain pan side wall is connected with the periphery of drain pan bottom plate, and the top of drain pan side wall upwards extends, and the drain pan side wall is the gradual expansion trend by end to top, is provided with fixed hollow post and fibre fixture block on the drain pan side wall, and the top of fixed hollow post is higher than the top setting of drain pan side wall.

The first optical fiber fixing table and the second optical fiber fixing table are consistent in structure and respectively comprise a table base and a table pressing plate which are connected up and down, an optical fiber groove cavity is formed between the bottom of the table base and the table pressing plate, and the top of the table base is connected with the chamber base plate.

The indoor bottom plate is provided with inner side foot holes and outer side foot holes, the table pressing plate comprises a narrow pressing plate and a wide pressing plate, the inner end of the narrow pressing plate is connected with the outer end of the wide pressing plate, the inner end of the wide pressing plate is arranged close to the cavity between tables, inner side foot pins and outer side foot pins are arranged on two sides of the wide pressing plate respectively, the inner side foot pins penetrate through the inner side face of the table base and are connected with the inner side foot holes in an inserted mode, the outer side foot pins penetrate through the outer side face of the table base and are connected with the outer side foot holes in an inserted mode, the inner side foot pins are contacted with the inner.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model relates to an among the smoke sensing device, drain pan and sensing chamber including interconnect, the middle part of drain pan has been seted up and has been led the cigarette through-hole, first that leads cigarette through-hole and connect inserts the piece, second inserts and inserts to press from both sides into between the piece and insert the chamber, the inside of sensing chamber is provided with just to one that sets up, No. two optic fibre fixed stations, one, it has the interbay cavity to press from both sides into between No. two optic fibre fixed stations, the smog of external environment is in proper order through leading the cigarette through-hole, insert behind the chamber and interbay cavity communicate with each other, in application, one, there is an optic fibre in No. two optic fibre fixed stations centre gripping separately, the head end of two optic fibres is just to setting up, the tail end of two optic fibres then respectively with the light source, signal detection processing apparatus is connected, when smog gets into interbay cavity, smog can lead to optic fibre and send to the light intensity of. Compared with the prior art, the design does not contain any electric signals and electronic components, does not adopt any radioactive element as the ion source, and only adopts the most common light source, so that the defects caused by the electric signals, the electronic components and the ion source in the prior art can be eliminated. Therefore, the utility model discloses do not have the potential safety hazard, be applicable to optic fibre and feel the cigarette, can avoid the defect that signal of telecommunication, electronic components, ion source lead to among the prior art.

2. The utility model relates to a smoke sensing device, first bottom, the cigarette through-hole that leads of inserting the piece, second bottom that inserts the piece presss from both sides into a breach and No. two breachs just to setting up altogether, a breach clamping is on the bottom of an optical fiber fixed station, No. two breach clamping is on the bottom of No. two optical fiber fixed stations, the bottom of a, No. two breachs all contacts with room bottom plate, this design not only does benefit to the outside smog that leads the cigarette through-hole entering directly to be led into in the inter-platform cavity, avoids it to stretch in the sensing room to strengthen the cigarette effect that gathers in the inter-platform cavity, improves the efficiency that optical fiber felt cigarette, and, can through the breach, the installation location when the installation of the joint realization assembly of optical fiber fixed station, improve assembly efficiency, especially when further setting up the relative position between breach, optical fiber fixed station, the effect is better, like the internal end portion of a breach on an optical fiber fixed station, the breach is located, Between the outer tip, a breach is close to the tip setting in a, and No. two breaches are located between tip, the outer tip in No. two on No. two optical fiber fixed stations, and No. two breaches are close to the tip setting in No. two, and in addition, when first closing plate, second closing plate exist, not only sealed effect is stronger, changes the location assembly in addition. Therefore, the utility model discloses not only gather the cigarette effect stronger, sensing effect is better, and assembly efficiency is higher moreover, easily operation.

3. The utility model relates to an among the smoke sensing device, be connected with a plurality of downwardly extending's room on the bottom open-ended mouth edge and participate in, a plurality of footing holes have been seted up around leading the cigarette through-hole on the drain pan bottom plate, the room is participated in and is carried out the plug-in connection that corresponds with the footing hole, and the area of drain pan bottom plate is greater than bottom open-ended area, this design enables the more sealed knot of sensing room in the inside of drain pan, not only the leakproofness is stronger, do benefit to the effect that strengthens smoke sensing, and can protect the sensing room that lies in wherein by the drain pan, improve its security when using, especially when the drain pan side wall exists, the security is higher. Therefore, the utility model discloses not only the leakproofness is better, and the security is stronger moreover.

4. The utility model relates to an among the smoke sensing device, the inboard foot hole and outside foot hole have been seted up on the room bottom plate, the platform clamp plate includes interconnect's narrow clamp plate, wide clamp plate, the both sides of wide clamp plate are provided with inboard participating in respectively, participate in the outside, during the application, the medial surface that inboard participating in hugs closely a base is worn through and is connected with inboard foot hole insertion after passing, the lateral surface that the platform base was closely participated in the outside is worn through and is connected with outside foot hole insertion after passing, the fastness of being connected between fixed station of optic fibre and the sensing room can not only be ensured in this design, and positioning effect is stronger, easily install, be difficult for makeing mistakes, in addition, all connections are all through inserting, the form of lock joint realizes, need not use screw or bolt, reduce connection cost. Therefore, the utility model discloses not only the fastness is stronger, and the cost is lower, easily assembles moreover and unpacks apart.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of fig. 1 viewed from below.

Fig. 3 is a schematic perspective view of the middle bottom case of the present invention.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic perspective view of the sensing chamber of the present invention.

Fig. 6 is a bottom view of fig. 5.

Fig. 7 is a schematic structural view of the middle platen of the present invention.

Fig. 8 is a schematic view of the structure of fig. 7 after inversion.

Fig. 9 is an assembly schematic of the present invention.

In the figure: first optical fiber fixing table 1, first inner end 10, first outer end 11, second optical fiber fixing table 2, second inner end 20, second outer end 21, inter-table cavity 22, table pressing plate 23, narrow pressing plate 231, wide pressing plate 232, inner pin 234, outer pin 235, table base 24, optical fiber groove cavity 25, bottom case 4, bottom case bottom plate 41, fixing through hole 411, fixing hollow column 412, bottom case side wall 42, smoke guide through hole 43, bottom clamping groove 44, upper transverse groove 441, next transverse groove 442, second transverse groove 443, bottom pin hole 45, fiber clamping block 46, sensing chamber 5, chamber bottom plate 51, chamber side enclosing plate 52, bottom opening 53, chamber pin 54, inner pin hole 55, outer pin hole 56, first insertion plate 6, second insertion plate 60, insertion cavity 61, first notch 62, second notch 63, first sealing plate 64, second sealing plate 65, second sealing plate 66, second sealing plate 67.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

Referring to fig. 1-9, a smoke sensing device; the sensing device comprises a bottom shell 4 and a sensing chamber 5 with a one-way opening, the sensing chamber 5 comprises a chamber bottom plate 51 and a chamber side enclosing plate 52, the top of the chamber side enclosing plate 52 is connected with the chamber bottom plate 51, the bottom of the chamber side enclosing plate 52 is provided with a bottom opening 53, the bottom opening 53 is connected with the top surface of the bottom shell 4, a first optical fiber fixing table 1 and a second optical fiber fixing table 2 which are arranged oppositely are arranged in the sensing chamber 5, and an inter-table cavity 22 is formed between the first optical fiber fixing table 1 and the second optical fiber fixing table 2;

the middle part of drain pan 4 has been seted up and has been led cigarette through-hole 43, should lead cigarette through-hole 43 and first insert 6, the bottom of second insert 60 is connected, first insert 6, the top of second insert 60 all contacts with room bottom plate 51, first insert 6 is located one side of an optic fibre fixed station 1, No. two optic fibre fixed stations 2, second insert 60 is located the opposite side of an optic fibre fixed station 1, No. two optic fibre fixed stations 2, insert chamber 61 and the interbedded cavity 22 UNICOM that presss from both sides between first insert 6, second insert 60, and lead cigarette through-hole 43 and interbedded cavity 22 and communicate with each other after inserting chamber 61.

At least two chamber pins 54 extending downwards are connected to the edge of the bottom opening 53; the bottom case 4 includes a bottom case bottom plate 41 located at the middle portion thereof, a smoke guiding through hole 43 is formed in the middle portion of the bottom case bottom plate 41, a bottom foot hole 45 inserted into and connected with the chamber pin 54 is formed on the bottom case bottom plate 41 around the smoke guiding through hole 43, and the area of the bottom case bottom plate 41 is larger than that of the bottom opening 53.

The bottom opening 53 is lower than the bottoms of the first optical fiber fixing table 1 and the second optical fiber fixing table 2.

The bottom of first inserted sheet 6, lead cigarette through-hole 43, second inserted sheet 60 presss from both sides into a breach 62 and No. two breach 63 just to setting up altogether, a breach 62 card is pressed from both sides on the bottom of an optic fibre fixed station 1, and No. two breach 63 cards are pressed from both sides on the bottom of No. two optic fibre fixed stations 2, and the bottom of a breach 62, No. two breach 63 all contacts with room bottom plate 51.

The first notch 62 is located between the first inner end portion 10 and the first outer end portion 11 on the first optical fiber fixing table 1, the first notch 62 is arranged close to the first inner end portion 10, the second notch 63 is located between the second inner end portion 20 and the second outer end portion 21 on the second optical fiber fixing table 2, and the second notch 63 is arranged close to the second inner end portion 20.

The two sides of the first insertion piece 6 are respectively connected with a first sealing plate 64 and a second sealing plate 65, the two sides of the second insertion piece 60 are respectively connected with a first sealing plate 66 and a second sealing plate 67, the first sealing plate 64 and the second sealing plate 66 are respectively contacted with the two sides of the first optical fiber fixing table 1, and the second sealing plate 65 and the second sealing plate 67 are respectively contacted with the two sides of the second optical fiber fixing table 2.

The first insertion sheet 6 and the second insertion sheet 60 are arc sheets protruding outwards relative to the circle center of the smoke guide through hole 43, and the distance between the first sealing plate 64 and the second sealing plate 66 and the distance between the first sealing plate 65 and the second sealing plate 67 are smaller than the maximum distance between the first insertion sheet 6 and the second insertion sheet 60.

The bottom case 4 further comprises a bottom case side wall 42, the bottom of the bottom case side wall 42 is connected with the periphery of the bottom case bottom plate 41, the top of the bottom case side wall 42 extends upwards, the bottom case side wall 42 is gradually expanded from bottom to top, a fixed hollow column 412 and a fiber clamping block 46 are arranged on the bottom case side wall 42, and the top end of the fixed hollow column 412 is higher than the top of the bottom case side wall 42.

The first optical fiber fixing table 1 and the second optical fiber fixing table 2 are consistent in structure and respectively comprise a table base 24 and a table pressing plate 23 which are connected up and down, an optical fiber groove cavity 25 is formed between the bottom of the table base 24 and the table pressing plate 23, and the top of the table base 24 is connected with a chamber bottom plate 51.

The indoor bottom plate 51 is provided with an inner pin hole 55 and an outer pin hole 56, the table pressing plate 23 comprises a narrow pressing plate 231 and a wide pressing plate 232, the inner end of the narrow pressing plate 231 is connected with the outer end of the wide pressing plate 232, the inner end of the wide pressing plate 232 is arranged close to the inter-table cavity 22, inner pins 234 and outer pins 235 are arranged on two sides of the wide pressing plate 232 respectively, the inner pins 234 penetrate through the inner side surface of the table base 24 and then are inserted into the inner pin holes 55, the outer pins 235 penetrate through the outer side surface of the table base 24 and then are inserted into the outer pin holes 56, the inner pins 234 are in contact with the inner side surface of the table base 24, and the outer pins 235 are in contact with the outer side surface of the table.

The principle of the utility model is explained as follows:

the utility model relates to a smoke sensing device is applicable to and adopts plastic optical fiber (optical cable) to survey smog, has solved the potential safety hazard of the signal of telecommunication essentially, simultaneously, does not have electronic components and has solved the wrong report and the failure problem that electronic components ageing leads to again.

When in use, an optical fiber is clamped in the first optical fiber fixing table 1 and the second optical fiber fixing table 2 respectively, so that the head ends of the two optical fibers are arranged oppositely, namely, the two optical fibers are respectively arranged at two ends of the inter-platform cavity 22, the tail ends of the two optical fibers are respectively connected with the light source and the signal detection processing device, light emitted by the light source passes through the inter-platform cavity 22 after being emitted by any one optical fiber (called as an emitting optical fiber), and then is received by the other optical fiber (called as a receiving optical fiber), then sent to the signal detection processing part, when the smoke enters the cavity 22 between the tables, the light intensity sent to the signal detection processing part by the receiving optical fiber is reduced, therefore, the smoke detection is realized, the green light LED is optimally adopted as the light source, a red light laser light source and a green light laser light source can also be adopted, and the plastic optical fiber adopts the plastic optical fiber (optical cable) with the standard communication level and the attenuation coefficient less than or equal to 0.2 dB/m.

After the two optical fibers are fixed, the sensing chamber 5 and the bottom shell 4 can be buckled, at this time, the insertion cavity 61 is communicated with the interbay cavity 22, and then the bottom shell 4 is connected with the rest of the smoke inlet components, so that the external smoke flows into the smoke guide through hole 43.

Example 1:

referring to fig. 1-9, a smoke sensing device; the sensing device comprises a bottom shell 4 and a sensing chamber 5 with a one-way opening, the sensing chamber 5 comprises a chamber bottom plate 51 and a chamber side enclosing plate 52, the top of the chamber side enclosing plate 52 is connected with the chamber bottom plate 51, the bottom of the chamber side enclosing plate 52 is provided with a bottom opening 53, the bottom opening 53 is connected with the top surface of the bottom shell 4, a first optical fiber fixing table 1 and a second optical fiber fixing table 2 which are arranged oppositely are arranged in the sensing chamber 5, and an inter-table cavity 22 is formed between the first optical fiber fixing table 1 and the second optical fiber fixing table 2; the middle part of drain pan 4 has been seted up and has been led cigarette through-hole 43, should lead cigarette through-hole 43 and first insert 6, the bottom of second insert 60 is connected, first insert 6, the top of second insert 60 all contacts with room bottom plate 51, first insert 6 is located one side of an optic fibre fixed station 1, No. two optic fibre fixed stations 2, second insert 60 is located the opposite side of an optic fibre fixed station 1, No. two optic fibre fixed stations 2, insert chamber 61 and the interbedded cavity 22 UNICOM that presss from both sides between first insert 6, second insert 60, and lead cigarette through-hole 43 and interbedded cavity 22 and communicate with each other after inserting chamber 61.

Example 2:

the basic contents are the same as example 1, except that:

at least two chamber pins 54 extending downwards are connected to the edge of the bottom opening 53; the bottom case 4 includes a bottom case bottom plate 41 located at the middle portion thereof, a smoke guiding through hole 43 is formed in the middle portion of the bottom case bottom plate 41, a bottom foot hole 45 inserted into and connected with the chamber pin 54 is formed on the bottom case bottom plate 41 around the smoke guiding through hole 43, and the area of the bottom case bottom plate 41 is larger than that of the bottom opening 53. Preferably, the bottom opening 53 is provided lower than the bottom of the first and second fiber fixing stages 1 and 2.

Example 3:

the basic contents are the same as example 1, except that:

the bottom of first inserted sheet 6, lead cigarette through-hole 43, second inserted sheet 60 presss from both sides into a breach 62 and No. two breach 63 just to setting up altogether, a breach 62 card is pressed from both sides on the bottom of an optic fibre fixed station 1, and No. two breach 63 cards are pressed from both sides on the bottom of No. two optic fibre fixed stations 2, and the bottom of a breach 62, No. two breach 63 all contacts with room bottom plate 51. The first notch 62 is located between the first inner end portion 10 and the first outer end portion 11 on the first optical fiber fixing table 1, the first notch 62 is arranged close to the first inner end portion 10, the second notch 63 is located between the second inner end portion 20 and the second outer end portion 21 on the second optical fiber fixing table 2, and the second notch 63 is arranged close to the second inner end portion 20.

Preferably, the first sealing plate 64 and the second sealing plate 65 are connected to two sides of the first insertion piece 6 respectively, the second sealing plate 66 and the second sealing plate 67 are connected to two sides of the second insertion piece 60 respectively, the first sealing plate 64 and the second sealing plate 66 are in contact with two sides of the first optical fiber fixing table 1 respectively, and the first sealing plate 65 and the second sealing plate 67 are in contact with two sides of the second optical fiber fixing table 2 respectively.

Example 4:

the basic contents are the same as example 1, except that:

the first optical fiber fixing table 1 and the second optical fiber fixing table 2 are consistent in structure and respectively comprise a table base 24 and a table pressing plate 23 which are connected up and down, an optical fiber groove cavity 25 is formed between the bottom of the table base 24 and the table pressing plate 23, and the top of the table base 24 is connected with a chamber bottom plate 51. The indoor bottom plate 51 is provided with an inner side pin hole 55 and an outer side pin hole 56, the table pressing plate 23 comprises a narrow pressing plate 231 and a wide pressing plate 232, the inner end of the narrow pressing plate 231 is connected with the outer end of the wide pressing plate 232, the inner end of the wide pressing plate 232 is arranged close to the inter-table cavity 22, inner side pins 234 and outer side pins 235 are respectively arranged on two sides of the wide pressing plate 232, the inner side pins 234 penetrate through the inner side face of the table base 24 and then are connected with the inner side pin hole 55 in an inserting mode, the outer side pins 235 penetrate through the outer side face of the table base 24 and then are connected with the outer side pin hole 56 in an inserting mode, the inner side pins 234 are in contact with the inner side face of the table base 24.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment, but all equivalent modifications or changes made by those skilled in the art according to the present invention should be included in the protection scope of the claims.

Claims

1. A smoke sensing device, characterized by: the sensing device comprises a bottom shell (4) and a sensing chamber (5) with a one-way opening, the sensing chamber (5) comprises a chamber bottom plate (51) and a chamber side enclosing plate (52), the top of the chamber side enclosing plate (52) is connected with the chamber bottom plate (51), the bottom of the chamber side enclosing plate (52) is provided with a bottom opening (53), the bottom opening (53) is connected with the top surface of the bottom shell (4), a first optical fiber fixing table (1) and a second optical fiber fixing table (2) which are arranged just opposite to each other are arranged in the sensing chamber (5), and an inter-table cavity (22) is formed between the first optical fiber fixing table (1) and the second optical fiber fixing table (2);

the middle part of drain pan (4) has been seted up and has been led cigarette through-hole (43), should lead cigarette through-hole (43) and first insert piece (6), the bottom of second insert piece (60) is connected, first insert piece (6), the top of second insert piece (60) all contacts with room bottom plate (51), first insert piece (6) are located an optic fibre fixed station (1), one side of No. two optic fibre fixed stations (2), second insert piece (60) are located an optic fibre fixed station (1), the opposite side of No. two optic fibre fixed stations (2), first insert piece (6), insert chamber (61) and the intermodal cavity (22) UNICOM that press from both sides between second insert piece (60), and lead cigarette through-hole (43) and communicate with each other with intermodal cavity (22) behind inserting chamber (61).

2. A smoke sensing device according to claim 1, wherein: at least two chamber pins (54) extending downwards are connected to the opening edge of the bottom opening (53); the bottom shell (4) comprises a bottom shell bottom plate (41) located in the middle of the bottom shell bottom plate, a smoke guide through hole (43) is formed in the middle of the bottom shell bottom plate (41), a foot hole (45) which is connected with the chamber plug pin (54) in an inserting mode is formed in the bottom shell bottom plate (41) around the smoke guide through hole (43), and the area of the bottom shell bottom plate (41) is larger than that of the bottom opening (53).

3. A smoke sensing device according to claim 2, wherein: the bottom opening (53) is lower than the bottoms of the first optical fiber fixing table (1) and the second optical fiber fixing table (2).

4. A smoke sensing device according to claim 1, 2 or 3, wherein: the bottom of first insert piece (6), lead cigarette through-hole (43), second insert piece (60) presss from both sides into just breach (62) and No. two breach (63) to setting up altogether, breach (62) card presss from both sides on the bottom of an optic fibre fixed station (1), No. two breach (63) card presss from both sides on the bottom of No. two optic fibre fixed stations (2), and the bottom of a breach (62), No. two breach (63) all contacts with room bottom plate (51).

5. A smoke sensing device according to claim 4, wherein: the first gap (62) is located between the first inner end portion (10) and the first outer end portion (11) on the first optical fiber fixing table (1), the first gap (62) is arranged close to the first inner end portion (10), the second gap (63) is located between the second inner end portion (20) and the second outer end portion (21) on the second optical fiber fixing table (2), and the second gap (63) is arranged close to the second inner end portion (20).

6. A smoke sensing device according to claim 4, wherein: the two sides of the first insertion piece (6) are respectively connected with a first sealing plate (64) and a second sealing plate (65), the two sides of the second insertion piece (60) are respectively connected with a first sealing plate (66) and a second sealing plate (67), the first sealing plate (64) and the second sealing plate (66) are respectively contacted with the two sides of the first optical fiber fixing table (1), and the second sealing plate (65) and the second sealing plate (67) are respectively contacted with the two sides of the second optical fiber fixing table (2).

7. A smoke sensing device according to claim 6, wherein: the first insertion piece (6) and the second insertion piece (60) are arc-shaped pieces protruding outwards relative to the circle center of the smoke guide through hole (43), and the distance between the first sealing plate (64) and the second sealing plate (66) and the distance between the first sealing plate (65) and the second sealing plate (67) are smaller than the maximum distance between the first insertion piece (6) and the second insertion piece (60).

8. A smoke sensing device according to claim 1, 2 or 3, wherein: the bottom shell (4) further comprises a bottom shell side wall (42), the bottom of the bottom shell side wall (42) is connected with the periphery of the bottom shell bottom plate (41), the top of the bottom shell side wall (42) extends upwards, the bottom shell side wall (42) gradually expands from bottom to top, a fixed hollow column (412) and a fiber clamping block (46) are arranged on the bottom shell side wall (42), and the top end of the fixed hollow column (412) is higher than the top of the bottom shell side wall (42).

9. A smoke sensing device according to claim 1, 2 or 3, wherein: the first optical fiber fixing table (1) and the second optical fiber fixing table (2) are consistent in structure and respectively comprise a table base (24) and a table pressing plate (23) which are connected up and down, an optical fiber groove cavity (25) is formed between the bottom of the table base (24) and the table pressing plate (23), and the top of the table base (24) is connected with a chamber bottom plate (51).

10. A smoke sensing device according to claim 9, wherein: the indoor bottom plate (51) is provided with inner side pin holes (55) and outer side pin holes (56), the table pressing plate (23) comprises a narrow pressing plate (231) and a wide pressing plate (232), the inner end of the narrow pressing plate (231) is connected with the outer end of the wide pressing plate (232), the inner end of the wide pressing plate (232) is arranged close to the interbay cavity (22), inner side pins (234) and outer side pins (235) are respectively arranged on two sides of the wide pressing plate (232), the inner side pins (234) penetrate through the inner side face of the table base (24) and then are connected with the inner side pin holes (55) in an inserting mode, the outer side pins (235) penetrate through the outer side face of the table base (24) and then are connected with the outer side pin holes (56) in an inserting mode, the inner side pins (234) are in contact with the inner side face of the table base (24), and the outer side pins (.