CN204029105U - A kind of aspirating smoke detection device - Google Patents

Abstract

The utility model relates to fire control equipment technical field, a kind of aspirating smoke detection device that the utility model provides, be provided with the sampling pipe of several thieff hatchs, the end cap that sampling pipe is provided with is provided with air hole, sampling pipe is connected with zonal device air intake opening in smoke alarm, zonal device gas outlet is connected with blower fan inlet end, blower fan exhaust end is connected with exhaust box, exhaust box is provided with air intake opening and exhausr port, zonal device is also provided with and detects gas return air inlet, detect gas return air inlet to be connected with laser detector air outlet, laser detector air intake vent is connected with filtrator air outlet, filtrator air intake vent is connected with exhaust box air outlet.The utility model has that blower fan volume is little, power saving, low noise advantage; Subregion is arranged reliably, the long-term accessible work of energy, is applicable to contaminated environment; External zonal device makes the warning of detector protected location significantly reduce; Thieff hatch pastes the serviceable life of the effective elongated pore of film and the absolute precision in guarantee hole and consistance, prevents hole blocked.

Description

A kind of aspirating smoke detection device

Technical field

The utility model relates to fire control equipment technical field, and what be specifically related to is a kind of aspirating smoke detection device.

Background technology

In prior art, conventional smoke-sensitive fire detector has ordinary ultrasonic probe smoke detector, infrared emission smoke detector and air suction type smoke fire detector, in fire fighting equipment, it is the most frequently used detection means that smoke detection is reported to the police, after detector alarm, fire broadcast can be started and evacuate personnel, fall subregion rolling screen door of setting fire and prevent fire spreading, start fire pump etc., effective and detection is accurately a very important ring in that link of school side.

Existing point type sense cigarette probe use face is the widest, and quantity is maximum, and its sensitivity is lower, is generally all greater than 2obs/m (shading rate), but cheap; Infrared emission sense cigarette probe can fire hazard aerosol fog effectively in detector large space, and sensitivity is also lower.Due to the limitation of its detection principle, some place cannot mass efficient use.

Air suction type smoke fire detector is a kind of pole early-stage smog sniffer that smoke detection develops in the recent period, its warning sensitivity can reach 0.001obs/m, it is nearly thousand times of conventional port smog probe, extremely strong detectivity is had to the micro-smog that the discovery stage of glowing in early days produces, promoted rapidly in recent years, and GB50116-2013 " Code for design of automatic fire alarm systems " have also been made clear and definite regulation.

Prior art as shown in Figure 1, generally laying length 50 ~ 200m in top is long at the scene, and diameter is 25mm flame-proof PVC pipe, is called for short sampling pipe, different according to the protected area of equipment, can have 50m × 1 piece; 50m × 2 piece; 100m × 2 piece; Various combination is waited in 100m × 4 piece, forms the series of products of air suction type smoke fire detector.If air flowing ultra-clean chamber protected location very frequently, sampling pipe can be arranged in return air inlet place, can stringing flexibly according to field condition, very convenient.In addition; each or several thieff hatch may correspond to monitoring or the detection of a protection zone; the mode in the space that all thieff hatchs correspondence one is large can also be taked; as the protection zone of logistic warehouse; cigarette is put at the thieff hatch place of sampling pipe end; equipment must be reported to the police in 120s, so just defines the length of sampling pipe in fire fighting alarm device.When some thieff hatchs enter cigarette, and other thieff hatch is smokeless, and just easily by dilution N doubly, N is sum porose on thieff hatch to smog, and when smoke intaking hole smog reaches 0.5obs/m (shading rate), equipment must be reported a fire.N numerical value is larger, and thieff hatch quantity is more, is more not easy to reach alarming value, so define the quantity of thieff hatch N.

Motor is adopted to drive flap valve in air breathing type detection device of the prior art: to illustrate if there is the air breathing type detection device of four circuits, pipeline is respectively P1-P4, during normal air-suction state, 4 valves are all opened, when needing to close a certain pipeline, by the step motor motor (P1 ~ P4) of correspondence, valve half-twist is closed, if P3 pipeline enters cigarette, after laser acquisition chamber sends total alerting signal, mainboard controls all pipelines and closes, after the smog emptying in laser probe chamber, start to open P1 pipeline, check whether smokescope rises to the threshold value that can report to the police again, and then close P1, air again in emptying laser cavity, by that analogy, by P2, P3, P4 judges one by one.Often judge that a pipeline needs+5 seconds 20 seconds time (time of emptying laser cavity) (sucking the time of corresponding sampling pipe smog), need 25 seconds altogether, diagnose 4 pipes to need 25 seconds × 4 times=100 seconds time, consuming time so long.In the poor place of air purity, after general use a period of time, roll-over valve inwall there is a large amount of dust deposit, cause often occurring that 90 ° of rotations are not in place, such as, when rotating to 85 °, be stuck, but position transducer display is not closed and is put in place, step motor continues again to rotate, and is so likely broken by the transmission gear of step motor, forms expendable damage.Simultaneously owing to being that dust accretions is stuck, be not closed completely and cause gas leakage, occur wrong diagnosis during judgement, consequence is more serious.

Utility model content

In order to overcome defect of the prior art; a kind of aspirating smoke detection device that the utility model provides; the problem that present blower fan volume is large, expense is electric, noise is large can be solved; especially domestic contaminated environment is applicable to; adopt external zonal device that the protected location of detector can be made significantly to reduce; improve sensitivity and stability, reach and make temperature range wider, early warning more early and the higher object of sensitivity.

The utility model is achieved by the following technical solution, a kind of aspirating smoke detection device, comprise sampling pipe, described sampling pipe is provided with several thieff hatchs, described each sampling pipe end is provided with end cap, described end cap is provided with the air hole for airflow balancing, described sampling pipe is connected with the air intake opening of zonal device in smoke alarm, described zonal device gas outlet is connected with blower fan inlet end, described blower fan exhaust end is connected with exhaust box, described exhaust box is provided with air intake opening and exhausr port, described zonal device is also provided with and detects gas return air inlet, described detection gas return air inlet is connected with the air outlet of laser detector, described laser detector air intake vent is connected with filtrator air outlet, described filtrator air intake vent is connected with described exhaust box air outlet, described laser detector by the gas information transmission that detects to control device and display device.

Further, described sampling pipe is y-type structure, and described zonal device is connected on the intersection point of described Y type sampling pipe by draft tube.

Further, described sampling pipe is the dendritic structure being provided with several y-type structures formation, and described zonal device is connected on the intersection point of Y type sampling pipe described in each by draft tube.

Further, described sampling pipe is T-type structure, described zonal device to be connected on the intersection point of described T-shaped sampling pipe by draft tube and or described zonal device be connected on described linear pattern sampling pipe by draft tube.

Further, be provided with the first silencing cavity and the second silencing cavity between described exhaust box air intake opening and exhausr port, described exhaust box outer wall is provided with deadening felt.

Further, described blower fan is arranged on the air intake opening place of described exhaust box.

Further, described blower fan is 2,3 or 4.

Further, described thieff hatch posts one side gummed paper, described one side gummed paper is provided with the first through hole, described thieff hatch is concentric with the center of circle of described first through hole, the diameter of described first through hole is less than described sampling diameter, described first through hole circumference is be made up of membraneous material to the annulus that described thieff hatch circumference is formed, and film thickness is 0.01-0.03mm.

Further, described thieff hatch posts one side gummed paper, described one side gummed paper is provided with the first through hole, and described thieff hatch is concentric with the center of circle of described first through hole, and the diameter of described first through hole is less than the diameter of described thieff hatch.

Further, be transparent annular membrane between the circumference of described first through hole and the circumference of described thieff hatch.

Compared with prior art, superior effect is: blower fan of the present utility model has that volume is little, power saving, reduction noise advantage; Subregion is reliable, and long-term accessible work, is more suitable for contaminated environment, and external zonal device makes the warning of the protected location of detector significantly reduce; Sensitivity, stability improve, and temperature range is wide, can more early early warning, and sensitivity is higher, can reach 0.0001%obs/m; Zonal device can assign to the sensing point of each or multiple common dot type probe neatly, thieff hatch pastes the serviceable life of the effective elongated pore of film, prevents hole blocked.

Accompanying drawing explanation

Fig. 1 is prior art structural representation;

Fig. 2 is sniffer structural representation described in the utility model;

The zonal device external Y structural representation that Fig. 3 is sniffer described in utility model;

The zonal device external T structural representation that Fig. 4 is sniffer described in utility model;

The muffler structure schematic diagram that Fig. 5 is sniffer described in utility model;

Fig. 6 is the prompting one side gummed paper schematic diagram of sniffer described in the utility model;

Fig. 7 is the structural representation of the thieff hatch subsides film of described sniffer.

Reference numeral is as follows:

1-negative inspiratory pressure chamber, 2-sampling pipe, 3-thieff hatch, 4-end cap, 5-laser detector, 6-filtrator, 7-control device, 8-smoke alarm, 9-blower fan, 10-laser sensor, 11-housing, 12-exhausr port, 13-exhaust box, 14-detects gas return air inlet, 15-zonal device, 16-connection jaws, 17-search coverage, 18-first silencing cavity, 19-second silencing cavity, 20-deadening felt, 21-first through hole, the transparent annular membrane of 22-, 23-one side gummed paper, 24-air intake opening.

In figure, direction shown in arrow is air or detects gas flow direction.

Embodiment

Below in conjunction with Figure of description 2-7, the utility model embodiment is described in further detail.

As shown in Figure 2, the utility model provides a kind of aspirating smoke detection device, comprise sampling pipe 2, described sampling pipe 2 is provided with several thieff hatchs 3, described sampling pipe 2 one end is provided with the end cap 4 for air balance, described end cap 4 is provided with air hole, sampling pipe 2 leaves the through hole of φ 8 (not marking long measure in embodiment all in units of millimeter) as thieff hatch 3, by the blower fan of device interior by the gas inhalation device of thieff hatch 3, the length of air hole diameter according to sampling pipe 2 on described end cap 4 or the connected mode of several pipes, and be configured for the air inflow of sampling pipe 2, to ensure that every root pipe can balance air inlet, and ensure that each thieff hatch 3 can in close to identical ratio air inlet.Described sampling pipe 2 other end is connected with the air intake opening 24 of the zonal device 15 in smoke alarm 8, described zonal device 15 gas outlet is connected with blower fan 9 inlet end, described blower fan 9 exhaust end is connected with exhaust box 13, described exhaust box 13 is provided with gas outlet 12, described zonal device 15 is also provided with and detects gas gas returning port 14, described detection gas gas returning port 14 is connected with the gas returning port of laser detector 5, described laser detector 5 is connected with filtrator 6, described filtrator 6 and described exhaust box 13 are connected to form and detect gas air inlet, described filtrator 13 and laser instrument 5 are formed and detect gas passage, and the circulation formed from described exhaust box 13 to the anterior negative pressuren zone of blower fan 9, described blower fan 9 can arrange multiple, preferably 2, 3 or 4.Described laser detector 5 by the gas information transmission that detects to control device 7 and display device, laser detector 5 is by the concentration of fine particle in detecting air, smoke particle etc. when fine particle mainly comprises fine dust, fire occurs, after detection, this concentration information is passed to control device 7, provides various alerting signal by control device 7.The design feature of zonal device 15 determine its can, high-level efficiency long-time in contaminated environment, work with high reliability, use laser detector 5 energy Precise Diagnosis during external zonal device to any one thieff hatch 3, make the partition address of laser detector 5 point quantity be equal to thieff hatch 3 quantity, and each thieff hatch 3 is high sensitivity.Like this, in suitable environment, heritage cigarette probe can be replaced and becomes a reality.

As shown in Figure 3, described sampling pipe 2 is y-type structure, described zonal device 15 is connected on the intersection point of described Y type sampling pipe by draft tube, described sampling pipe 2 can also be provided with the dendritic structure that several y-type structures are formed, and described zonal device 15 is connected on the intersection point of Y type sampling pipe described in each by draft tube.Sampling pipe 2 is after extending equipment; tree structure can also be adopted; a zonal device is placed in each point of crossing, every N number of sampled point, corresponding specific protected location; chopped-off head subregion is F1; secondary partition is F2, F2 ', three grades of subregions are F3, F3 ', F3 ", level Four subregion is F4; until more multistage subregion, all subregions are all opened at ordinary times.As smog appears in distalmost end A district, approximatioss gradually can be adopted to judge, when main frame is reported to the police, namely F1 judges that there is cigarette on right side, restarts F2 ' and judges that there is cigarette on right side, restart F3 " judge there is cigarette on the left of operation, restart F4 and judge, can obtain A district has cigarette.Also can adopt dichotomy or alternate manner, find A point fast.Each protected location effectively can accurately judge by these circulation diagnosis fast; because the thieff hatch in each protected location is high sensitivity; so this frame mode effectively can replace common muting sensitivity sense cigarette probe; reach the high sensitivity making air suction type smoke fire detector keep thieff hatch; can accurately locate again; each protected location, even to a thieff hatch, thus replaces traditional sense cigarette probe.This is the revolutionary character lifting of fire-fighting Detection Techniques, has far reaching significance.

As shown in Figure 4; described sampling pipe 2 is T-type structure; described zonal device 15 to be connected on the intersection point of described T-shaped sampling pipe 2 by draft tube and or described zonal device 15 be connected on described linear pattern sampling pipe 2 by draft tube; in addition; also linear pattern connected mode subregion can be adopted; Hybrid connections mode subregion can also be adopted; owing to having pneumatic sensor in each zonal device; therefore except fire hazard aerosol fog is accurately located; whether can also block the thieff hatch 3 in each protected location and carry out accurate location determination, greatly improve effective utilization.

As shown in Figure 5, described exhaust box 13 is provided with air intake opening and exhausr port 12, the first silencing cavity 18 and the second silencing cavity 19 is provided with between the air intake opening of described exhaust box 13 inside and exhausr port, described exhaust box 13 outer wall is provided with acoustic blankets 20, described blower fan 9 is arranged on the air intake opening of described exhaust box 13, and the structure taking to arrange miniature first silencing cavity 18 and the second silencing cavity 19 behind malleation chamber reduces noise, slow down the impulsive force of high-speed gas and flow velocity, gas is made to change direction back and forth in the first silencing cavity 18 and the second silencing cavity 19 kinds, noise nearly 20 decibels (db) will be reduced, and ensure that the pumping speed of blower fan is in the scope that can bear, when end enters cigarette, 120s should detect fire alarm.Simultaneously, in order to more effectively noise can be reduced, at the member outside of all gas circuit processes, the damping sound insulation felt of parcel one deck 2 ~ 3mm, deadening felt is with the coiled material of high-purity Fine iron powder and rubber composition or sheet material, up to the iron powder proportion of 90%, effectively improve surface density, surface density is higher, and material is also heavy, and soundproof effect is remarkable.Wherein, monomer note power sound transmission loss easily reaches more than 20db, and thickness only needs 2 ~ 3mm, it is fire-retardant, moistureproof, nontoxic, soft simultaneously, and be easily cut into shape, had silencing cavity and damping sound insulation felt, overcome noise effect, making miniature high-speed axial flow blower enter aspirating smoke detector becomes possibility.

As shown in Figure 7, described thieff hatch 3 posts one side gummed paper 23, described one side gummed paper 23 is provided with the first through hole 21, described thieff hatch 3 is concentric with the center of circle of described first through hole 21, and the diameter of described first through hole 21 is less than described thieff hatch 3 diameter, and the annulus that described first through hole 21 circumference is formed to described thieff hatch 3 circumference is made up of membraneous material, film thickness is 0.01 ~ 0.03mm, because film is shaken under the blowing force of air, dust accretions can not be allowed, play clean effect.Can also print the diameter numeral of the first through hole 21 on one side gummed paper 23, such design, can make people be more prone to find the position of thieff hatch 3, carry out smoothly checking and cleaning work.Do not add the thieff hatch 3 of film in addition due to long-time air inlet, air intake tangent plane is the thickness 1.5mm of tube wall, wind shear section is large, easily sticky dust, easily at the bonding dust of air admission hole surrounding when particularly the air of heavy contamination enters, formed alleged " panda eye " in industry, and of long duration after hole is thoroughly blocked.Therefore must by hole complete liquidation every about 1 year, the just difficult cleaning when sampling pipe 2 is arranged in large space.And aspirating smoke detector is a lot of in large space application, part dust can be removed by blowback pvc pipe road, but poor effect.As air humidity is little during accumulation, pile up without oiliness, loosely, be easy to blow down, but as large in air humidity when piling up or have oiliness, and that will form the larger clay of bonding force, be no matter that the lump difficulty that wet weather or dry weather are formed is removed during blowback, artificial reaming must be adopted.The design proposal that the utility model is above-mentioned, when using at wet environment, film surface also can form a little accumulation, but when dry weather, blowback PVC pipeline, because blowback pressure is much larger than normal air inlet, film is oppositely protruding in the space of φ 8, not disconnecting and stopping along with blowback pressure, shaken off by the accumulation lump on the film of φ 8 space rapidly, effect clearly.When oiliness environment uses, because wind shear section is very thin, thickness is only between 0.01-0.03mm, dust all at film outside, also easy-clear.Onsite application, oiliness environment is less.Can be formed after one side gummed paper 23 cements and firmly seal, without any requirement to nonstandard PVC external diameter.The dedicated film of different aperture can be pasted as requested, easy construction.Main be due to one side gummed paper 23 at thieff hatch 3 be φ 8 range intervals bottom without supporter, when normal air inlet, film is along with start air inlet, can shake when normal air inlet, namely one side gummed paper 23 is not a fixing arc surface in transparent annular membrane 22 region surface, and the accumulation of such dust is not easily formed, and film is very thin, when wind shear section is PVC pipe from former sampling pipe 2, pvc pipe wall thickness 1.5-2mm becomes 0.02 millimeter.More than 90% can be declined at the laying dust of wind shear section, greatly reduce the laying dust quantity of wind shear section.By facts have proved, the duration of congestion of thieff hatch 3 can extend more than 4 times, and last being difficult to thoroughly blocks.

Adopt the very thin plastic sheeting center drilling of dedicated film to be the first through hole 21 in the present embodiment, orifice configurations diameter can form series of apertures between φ 2.0-φ 4.0, and covers glue at the back side of film, and glue can not be covered in the space in φ 10 hole of φ 2.0 hole surrounding.

As shown in Figure 6, described thieff hatch 3 posts the one side gummed paper 23 of bright-colored, described one side gummed paper 23 is provided with the first through hole 21, and described thieff hatch 3 is concentric with the center of circle of described first through hole 21, and the diameter of described first through hole 21 is less than the diameter of described thieff hatch 3.The sampling pipe of general PVC selects φ 25, φ 20, φ 16, three kind of specification, and open a thieff hatch 3 every a segment distance, thieff hatch 3 directly uses drill bit perforate on pvc pipe, bore dia be the distance of φ 8, Kong Yukong between 3-8 rice not etc.As stated above after perforate, tapping is affixed on a red one side gummed paper 23, one side gummed paper 23 has different pore size aperture, aperture specification can be φ 2, φ 2.5, φ 3.0, φ 3.2, φ 4.0, φ 5.0 etc., punching due to the first through hole 21 is laser high-precision punching, and consistance is high.And existing thieff hatch 3 is φ 8, even if φ 8 is lack of standardization, do not affect precision and the consistance of thieff hatch 2 yet.To make on pvc pipe hole center superposition on hole and gummed paper, object identifies to have thieff hatch 3 herein.

The utility model tool has the following advantages: blower fan volume is little, power saving, reduction noise advantage; Subregion is reliable, and long-term accessible work, is more suitable for contaminated environment, and external zonal device is that the protected location of detector infinitely reduces; Sensitivity, stability improve, and temperature range is wide, more early early warning, and current sensitivity is up to 0.0001%obs/m; Air-flow detection Improving The Quality of Products, reduces manual debugging intensity, starts of the same trade the first; The sensing point that external subregion can assign to each or multiple ordinary ultrasonic probe is neatly that air suction type produces revolutionary change.

The utility model is not limited to above-mentioned embodiment, and when not deviating from flesh and blood of the present utility model, any distortion that it may occur to persons skilled in the art that, improvement, replacement all fall into scope of the present utility model.

Claims (10)

1. an aspirating smoke detection device, comprise sampling pipe (2), described sampling pipe (2) is provided with several thieff hatchs (3), described each sampling pipe (2) end is provided with end cap (4), described end cap (4) is provided with the air hole for airflow balancing, it is characterized in that, described sampling pipe (2) is connected with the air intake opening (24) of zonal device (15) in smoke alarm (8), described zonal device (15) gas outlet is connected with blower fan (9) inlet end, described blower fan (9) exhaust end is connected with exhaust box (13), described exhaust box (13) is provided with air intake opening and exhausr port (12), described zonal device (15) is also provided with and detects gas return air inlet (14), described detection gas return air inlet (14) is connected with the air outlet of laser detector (5), described laser detector (5) air intake vent is connected with filtrator (6) air outlet, described filtrator (6) air intake vent is connected with described exhaust box (13) air outlet, described laser detector (5) by the gas information transmission that detects to control device (7) and display device.

2. state aspirating smoke detection device according to claim 1, it is characterized in that, described sampling pipe (2) is y-type structure, and described zonal device (15) is connected on the intersection point of described Y type sampling pipe by draft tube.

3. aspirating smoke detection device according to claim 1, it is characterized in that, the dendritic structure that described sampling pipe (2) is formed for being provided with several y-type structures, described zonal device (15) is connected on the intersection point of Y type sampling pipe described in each by draft tube.

4. aspirating smoke detection device according to claim 1, it is characterized in that, described sampling pipe (2) is T-type structure, described zonal device (15) to be connected on the intersection point of described T-shaped sampling pipe (2) by draft tube and or described zonal device (15) be connected on described linear pattern sampling pipe (2) by draft tube.

5. aspirating smoke detection device according to claim 1, it is characterized in that, be provided with the first silencing cavity (18) and the second silencing cavity (19) between described exhaust box (13) air intake opening and exhausr port (12), described exhaust box (13) outer wall is provided with deadening felt (20).

6. aspirating smoke detection device according to claim 1, it is characterized in that, described blower fan (9) is arranged on the air intake opening place of described exhaust box (13).

7. aspirating smoke detection device according to claim 6, it is characterized in that, described blower fan (9) is 2,3 or 4.

8. aspirating smoke detection device according to claim 1, it is characterized in that, (3) post one side gummed paper to described thieff hatch, described one side gummed paper is provided with the first through hole (21), described thieff hatch (3) is concentric with the center of circle of described first through hole (21), the diameter of described first through hole (21) is less than described thieff hatch (3) diameter, the annulus that described first through hole (21) circumference is formed to described thieff hatch (3) circumference is made up of membraneous material, and film thickness is 0.01-0.03mm.

9. aspirating smoke detection device according to claim 1, it is characterized in that, described thieff hatch (3) posts one side gummed paper (23), described one side gummed paper (23) is provided with the first through hole (21), described thieff hatch (3) is concentric with the center of circle of described first through hole (21), and the diameter of described first through hole (21) is less than the diameter of described thieff hatch (3).

10. aspirating smoke detection device according to claim 8, it is characterized in that, be transparent annular membrane (22) between the circumference of the first through hole (21) on described one side gummed paper (23) and the circumference of described thieff hatch (3).