CN217113479U

CN217113479U - Very early air suction type pyrolysis particle fire detector

Info

Publication number: CN217113479U
Application number: CN202220749302.9U
Authority: CN
Inventors: 胡丙辉; 郑宋奇; 郭亚帆
Original assignee: Hainan Zhongwei Technology Co ltd
Current assignee: Hainan Zhongwei Technology Co ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-02
Anticipated expiration: 2032-04-02

Abstract

The utility model relates to an extremely early air-breathing pyrolysis particle fire detector, which comprises a main shell, wherein a sampling component and a particle analysis processing component are arranged in the main shell; the sampling assembly comprises a sampling pipe network and an air pump, a filtering assembly is arranged in the main shell, and an air outlet of the air pump is communicated with an input end of the filtering assembly; the particle analysis processing assembly comprises an outer shell and an inner shell, wherein two opposite sides of the inner shell are communicated with a sample inlet pipe and a sample outlet pipe which penetrate out of the outer shell, the sample outlet pipe is communicated with an exhaust pipeline, the top end of the exhaust pipeline extends out of the main shell and is provided with an exhaust valve, refrigeration equipment is arranged in an outer cavity, and a temperature and humidity sensor, a pressure sensor, a laser emitter and a photoelectric sensor which are matched with each other are arranged in an inner cavity; the system also comprises a control system which is electrically connected with the air pump, the exhaust valve, the refrigeration equipment, the temperature and humidity sensor, the pressure sensor, the laser emitter and the photoelectric sensor. The utility model discloses have very early warning, sensitivity is high, protection scope big and nimble beneficial effect such as sampling.

Description

Very early air-breathing pyrolysis particle fire detector

Technical Field

The utility model relates to a fire detector especially relates to an extremely early formula pyrolysis particle fire detector of breathing in belongs to conflagration early warning equipment technical field.

Background

With the progress of human science and technology, the performance of a fire detector is continuously improved, the problem which cannot be solved in the past is solved, and the capability of fire detection equipment is still tested in many occasions today.

In the field of fire detection, except for traditional smoke-sensitive probes and temperature-sensitive probes, the existing air-suction type smoke-sensitive fire detector is widely applied to important places such as machine rooms, large spaces and the like as a high-sensitivity early-stage smoke-sensitive fire detector, but the air-suction type smoke-sensitive fire detector in the prior art has various problems and defects, the existing air-suction type smoke-sensitive fire detector generally adopts a laser or LED light source, the smoke concentration is tested by adopting the light scattering principle, the detected smoke concentration is limited by the wavelength (the laser is about 0.3 mu m) of a detection light source used by the detector, if the light wavelength is larger than the particle diameter, the existence of smoke particles cannot be detected, but in the very early stage of fire, the diameter of pyrolysis particles released by heating is about 0.001 mu m-0.1 mu m, so the laser type or LED type air-suction type smoke-sensitive fire detector adopting the light scattering principle cannot detect the very early sign of fire Is inevitable.

SUMMERY OF THE UTILITY MODEL

The utility model discloses mainly be to the above-mentioned problem that prior art exists, provide an extremely early formula pyrolysis particle fire detector of breathing in.

The purpose of the utility model is mainly realized by the following scheme:

the extremely early air suction type pyrolysis particle fire detector comprises a main shell, wherein a sampling assembly and a particle analysis processing assembly are arranged in the main shell; the sampling assembly comprises a sampling pipe network and an air pump, wherein the air inlet end of the sampling pipe network is positioned outside the main shell, the air outlet end of the sampling pipe network is communicated with the air inlet of the air pump arranged in the main shell, the main shell is also internally provided with a filtering assembly, and the air outlet of the air pump is communicated with the input end of the filtering assembly; the particle analysis processing assembly comprises an outer shell and an inner shell, an outer cavity is formed between the outer shell and the inner shell, an inner cavity is formed inside the inner shell, the two opposite sides of the inner shell are communicated with a sample inlet pipe and a sample outlet pipe which penetrate out of the outer shell, the sample inlet pipe is communicated with the output end of the filtering assembly, the sample outlet pipe is communicated with an exhaust pipeline, the top end of the exhaust pipeline extends out of the main shell, an exhaust valve is installed on the exhaust pipeline, refrigeration equipment is arranged in the outer cavity, and a temperature and humidity sensor, a pressure sensor, a laser emitter and a photoelectric sensor which are matched with each other are installed in the inner cavity; the fire detector also comprises a control system connected with a power supply, and the air suction pump, the exhaust valve, the refrigeration equipment, the temperature and humidity sensor, the pressure sensor, the laser emitter and the photoelectric sensor are all electrically connected with the control system.

Preferably, the sampling pipe network includes a plurality of admission lines and the sampling pipeline of being connected with the admission line top, be equipped with at least one air sampling mouth on the sampling pipeline, and the tip of sampling pipeline all is equipped with the shutoff head.

Preferably, at least one sampling pipeline is connected with a sampling hose, and the sampling hose is provided with at least one air sampling port.

Preferably, a gas collecting cavity is communicated between the bottom end of the gas inlet pipeline and the gas inlet of the air extracting pump.

Preferably, the refrigeration equipment adopts a semiconductor refrigeration sheet, and the inner shell adopts a metal shell.

Preferably, the laser emitter adopts a helium-neon laser, and the photoelectric sensor adopts a photodiode.

Preferably, the sample inlet pipe and the sample outlet pipe are oppositely arranged at the left side and the right side of the inner shell, and the laser emitter and the photoelectric sensor are oppositely arranged at the upper side and the lower side of the inner wall of the inner shell.

Preferably, a display screen and a key set electrically connected with the control system are embedded in the front side of the main shell, and heat dissipation holes are formed in the front side and the rear side of the main shell.

Preferably, an alarm electrically connected with the control system is further arranged in the main shell.

Preferably, the outer edge of the main shell is provided with a fixing screw hole.

Therefore, compared with the prior art, the utility model discloses possess following advantage:

(1) the utility model has the advantages that the installation is extremely simple, the coverage area is large, the complex connecting and installation and debugging work is avoided, the installation form of the sampling pipe network is various, different laying modes can be adopted, and for the airtight space which is difficult to be detected, the mode of the sampling hose can be adopted, so that the problem of the obstruction of the airtight space is solved;

(2) the utility model discloses a particle analysis processing subassembly that sets up, the interior chamber is gone into to the sample air through the aspiration pump, make the gaseous atmospheric pressure of interior chamber increase, the temperature risees, use refrigeration plant to refrigerate to the outer chamber simultaneously, make the inside and outside difference in temperature of interior casing grow in twinkling of an eye, form steam in the interior chamber, make nanometer particle form the water smoke of taking the particle under the parcel of steam in the sample air, start laser emitter this moment, the water smoke that has the nanometer particle shelters from laser and follows rectilinear propagation, make laser scattering, the light intensity that causes photoelectric sensor to receive laser changes, according to the change of light intensity, the concentration of particle in the sample air is calculated out to the size of interior chamber and the pressure in the interior chamber;

(3) the utility model discloses a filtering component who sets up can block the dust granule of adulteration in the sample air, avoids the dust granule to sneak into the interior chamber of particle analysis processing subassembly and influences the testing result.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an external structural view of the present invention;

fig. 3 is a schematic structural diagram of the middle sampling pipe network of the present invention.

Illustration of the drawings: 1-a main shell, 2-an air pump, 3-a filter assembly, 4-an outer shell, 5-an inner shell, 6-an outer cavity, 7-an inner cavity, 8-a sample inlet pipe, 9-a sample outlet pipe, 10-an exhaust pipeline, 11-an exhaust valve, 12-refrigeration equipment, 13-a temperature and humidity sensor, 14-a pressure sensor, 15-a laser transmitter, 16-a photoelectric sensor, 17-an air inlet pipeline, 18-a sampling pipeline, 19-an air sampling port, 20-a sealing head, 21-a sampling hose, 22-a gas collection cavity, 23-a display screen, 24-a key set, 25-heat dissipation holes, 26-an alarm and 27-a fixing screw hole.

Detailed Description

The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings. It is to be understood that the practice of the present invention is not limited to the following examples, and that any modifications and/or changes in form made to the present invention are intended to fall within the scope of the present invention.

In the utility model, all parts and percentages are weight units, and the adopted equipment, raw materials and the like can be purchased from the market or commonly used in the field if not specified. The methods in the following examples are conventional in the art unless otherwise specified. The components or devices in the following examples are, unless otherwise specified, standard parts or parts known to those skilled in the art, the structure and principle of which are known to those skilled in the art through technical manuals or through routine experimentation.

Example 1:

as shown in fig. 1, 2, the utility model provides a technical scheme, the very early formula pyrolysis particle fire detector of breathing in, main casing body 1 including the cuboid structure, be equipped with the sampling subassembly in the main casing body 1, particle analysis handles the subassembly and is connected with the control system of power, the sampling subassembly is used for the ion analysis processing subassembly of sample air pump income, the particle analysis processing subassembly is arranged in detecting the concentration of particle in the sample air, and feed back the information that detects to control system, main casing body 1 outer fringe is equipped with fixed screw 27, be convenient for fix this fire detector in the position that needs the installation.

Above-mentioned sampling subassembly comprises sampling pipe network and aspiration pump 2, the inlet end of sampling pipe network is located the main casing body 1 outside, the conflagration resultant in the environmental protection is inhaled in the initiative, the end of giving vent to anger of sampling pipe network communicates with the air inlet of the aspiration pump 2 of the main casing body 1 internally mounted, still install filter assembly 3 in the main casing body 1, the gas outlet of aspiration pump 2 and filter assembly 3's input intercommunication, filter assembly 3 demountable installation is in the main casing body 1, filter assembly 3 includes the filter chamber at both ends and the filter plate of intercommunication between two filter chambers in this embodiment, filter assembly 3 can block the dust granule of adulteration in the sample air, avoid the interior chamber 7 of dust granule sneaking into particle analysis processing subassembly and influence the testing result.

Above-mentioned particle analysis processing subassembly includes shell body 4 and interior casing 5, be formed with outer cavity 6 between shell body 4 and the interior casing 5, interior casing 5 is inside to be formed with interior cavity 7, and the relative both sides intercommunication of interior casing 5 has the appearance pipe 8 and the appearance pipe 9 of advancing of wearing out shell body 4, the output intercommunication of appearance pipe 8 and filter assembly 3, it stretches out the exhaust duct 10 intercommunication of main casing body 1 with the top to go out appearance pipe 9, and install discharge valve 11 on the exhaust duct 10, be equipped with the refrigeration plant 12 that is convenient for cool down to the air sample in the interior cavity 7 in the outer cavity 6, install temperature and humidity sensor 13 in interior cavity 7, pressure sensor 14, and mutually supporting laser emitter 15 and photoelectric sensor 16.

Example 2:

as shown in fig. 1, 2 and 3, the utility model provides another kind of technical scheme, very early formula pyrolysis particle fire detector of breathing in, the sampling pipe network includes a plurality of admission pipes 17 and the sampling pipeline 18 of being connected with the admission pipe 17 top, and admission pipe 17 is equipped with four in this embodiment, is equipped with at least one air sampling mouth 19 on the sampling pipeline 18, and the tip demountable installation of sampling pipeline 18 has shutoff head 20, and sampling pipeline 18 adopts the PVC pipe.

At least one sampling pipeline 18 is connected with a sampling hose 21 through a three-way joint, at least one air sampling port 19 is arranged on the sampling hose 21, the sampling hose 21 can go deep into the closed space for sampling, the problem of closed space obstruction is solved, and the diameters of the air sampling ports 19 on the sampling pipeline 18 and the sampling hose 21 are both 1 mm.

In a preferred embodiment, the bottom ends of the four air inlet pipes 17 are communicated with a funnel-shaped air collecting cavity 22, and the other end of the air collecting cavity 22 is communicated with an air inlet of the air extracting pump 2.

In a preferred embodiment, the refrigeration device 12 is made of semiconductor refrigeration sheets, and the inner housing 5 is made of a metal housing, which can make the temperature difference between the inner chamber 7 and the outer chamber 6 more obvious, and can be made of silver or copper film.

In a preferred embodiment, the laser emitter 15 is a helium-neon laser and the photosensor 16 is a photodiode.

In a preferred embodiment, the sample inlet pipe 8 and the sample outlet pipe 9 are oppositely arranged at the left side and the right side of the inner shell 5, the laser emitter 15 and the photoelectric sensor 16 are oppositely arranged at the upper side and the lower side of the inner wall of the inner shell 5, the axes of the sample inlet pipe 8 and the sample outlet pipe 9 are positioned on the same straight line, and the laser emitter 15 and the photoelectric sensor 16 are perpendicular to the axis of the sample inlet pipe 8 or the sample outlet pipe 9.

Sample air is pumped into an inner chamber 7 of the particle analysis processing assembly through a sampling pipe network and an air pump 2 via a filter assembly 3, and it is noted that in the process, exhaust valves 11 at an exhaust pipeline 10 are in a closed state, the air pressure of the inner chamber 7 is increased and the temperature is increased as the air sample is continuously pumped into the inner chamber 7, and meanwhile, a refrigeration device 12 is used for refrigerating and cooling the outer chamber 6, so that the temperature difference between the inside and the outside of an inner shell 5 is instantly increased, water vapor is formed in the inner chamber 7, nanoscale particles in the sample air are enabled to form water mist with the particles under the wrapping of the water vapor, at the moment, a laser emitter 15 is started, shielded water mist laser with nano particles is transmitted along a straight line, the laser is enabled to be scattered, the light intensity of the laser received by a photoelectric sensor 16 is enabled to be changed, the concentration of the particles in the sample air is calculated according to the change of the light intensity, the size of the inner chamber 7 and the pressure in the inner chamber 7, the pressure sensor is used for detecting the pressure in the inner chamber 7, the temperature and humidity sensor 13 is used for detecting the temperature and humidity in the inner chamber 7, and in addition, it can be understood that a plurality of alarm thresholds with different levels are set according to the actual situation on site, when the particle concentration reaches the alarm threshold of a certain level, corresponding sound and light alarm is carried out, and alarm output is carried out.

As a preferred embodiment, the display screen 23 and the key set 24 electrically connected with the control system are embedded in the front side of the main casing 1, the display screen 23 and the key set 24 cooperate to set rotation parameters, alarm threshold values and the like of the air extracting pump 2, and heat dissipation holes 25 are formed in the front side and the rear side of the main casing 1 corresponding to the positions of the air extracting pump 2, so that heat dissipation in the main casing 1 is facilitated, and damage to internal components due to overhigh temperature is avoided.

In a preferred embodiment, an alarm 26 electrically connected with the control system is further provided in the main housing 1, and the alarm 26 includes an audible alarm and a light alarm.

As a preferred embodiment, the suction pump 2, the exhaust valve 11, the refrigeration equipment 12, the temperature and humidity sensor 13, the pressure sensor 14, the laser emitter 15, the photoelectric sensor 16, the display screen 23, the key set 24 and the alarm 26 are all electrically connected to a control system, which may be a single chip microcomputer or a PLC in this embodiment.

The utility model provides an extremely early formula pyrolysis particle fire detector of breathing in, through the sampling pipe network that sets up, the installation is extremely simple, and coverage area is big, has avoided loaded down with trivial details line and installation debugging work, and sampling pipe network installation form is various moreover, can adopt different laying mode, to the airtight space that is difficult to be surveyed, can adopt the mode of sampling hose, solves the problem of enclosure space separation; through the particle analysis processing assembly, sample air is pumped into the inner cavity through the air suction pump, so that the air pressure of gas in the inner cavity is increased, the temperature is raised, meanwhile, the outer cavity is refrigerated by using refrigeration equipment, the temperature difference between the inside and the outside of the inner shell is instantly increased, water vapor is formed in the inner cavity, nanoscale particles in the sample air are promoted to form water mist with the particles under the wrapping of the water vapor, at the moment, the laser transmitter is started, the water mist with the nanoparticles shields laser to be transmitted along a straight line, the laser is scattered, the light intensity of the laser received by the photoelectric sensor is changed, and the concentration of the particles in the sample air is calculated according to the change of the light intensity, the size of the inner cavity and the pressure in the inner cavity; through the filter assembly who sets up, can block the dust granule of adulteration in the sample air, avoid the dust granule to mix into the inner chamber of particle analysis processing subassembly and influence the testing result.

It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications of the present invention may be made by those skilled in the art after reading the teachings of the present invention, and these equivalents also fall within the scope of the appended claims.

Claims

1. Extremely early formula pyrolysis particle fire detector of breathing in, including main casing body (1), its characterized in that: a sampling component and a particle analysis processing component are arranged in the main shell (1); the sampling assembly comprises a sampling pipe network and an air pump (2), the air inlet end of the sampling pipe network is positioned outside the main shell (1), the air outlet end of the sampling pipe network is communicated with the air inlet of the air pump (2) arranged inside the main shell (1), a filter assembly (3) is further arranged in the main shell (1), and the air outlet of the air pump (2) is communicated with the input end of the filter assembly (3); the particle analysis processing assembly comprises an outer shell (4) and an inner shell (5), an outer chamber (6) is formed between the outer shell (4) and the inner shell (5), an inner chamber (7) is formed inside the inner shell (5), and the two opposite sides of the inner shell (5) are communicated with a sample inlet pipe (8) and a sample outlet pipe (9) which penetrate out of the outer shell (4), the sample inlet pipe (8) is communicated with the output end of the filtering component (3), the sample outlet pipe (9) is communicated with an exhaust pipeline (10) the top end of which extends out of the main shell (1), an exhaust valve (11) is arranged on the exhaust pipeline (10), refrigeration equipment (12) is arranged in the outer chamber (6), a temperature and humidity sensor (13) and a pressure sensor (14) are arranged in the inner chamber (7), and a laser emitter (15) and a photoelectric sensor (16) which are matched with each other; the fire detector further comprises a control system connected with a power supply, and the air suction pump (2), the exhaust valve (11), the refrigeration equipment (12), the temperature and humidity sensor (13), the pressure sensor (14), the laser emitter (15) and the photoelectric sensor (16) are all electrically connected with the control system.

2. The very early aspirated pyrolytic particle fire detector of claim 1, wherein: the sampling pipe network comprises a plurality of air inlet pipelines (17) and sampling pipelines (18) connected with the top ends of the air inlet pipelines (17), at least one air sampling port (19) is formed in each sampling pipeline (18), and the end portions of the sampling pipelines (18) are provided with plugging heads (20).

3. The very early aspirated pyrolytic particle fire detector of claim 2, wherein: at least one sampling pipeline (18) is connected with a sampling hose (21), and at least one air sampling port (19) is arranged on the sampling hose (21).

4. The very early aspirated pyrolytic particle fire detector of claim 3, wherein: and a gas collecting cavity (22) is communicated between the bottom end of the gas inlet pipeline (17) and the gas inlet of the air extracting pump (2).

5. The very early aspirated pyrolytic particle fire detector of claim 1, wherein: the refrigeration equipment (12) adopts a semiconductor refrigeration sheet, and the inner shell (5) adopts a metal shell.

6. The very early aspirated pyrolytic particle fire detector of claim 1, wherein: the laser emitter (15) adopts a helium-neon laser, and the photoelectric sensor (16) adopts a photodiode.

7. The very early aspirated pyrolytic particle fire detector of claim 6, wherein: the laser sampler is characterized in that the sampling tube (8) and the sampling tube (9) are arranged on the left side and the right side of the inner shell (5) relatively, and the laser emitter (15) and the photoelectric sensor (16) are arranged on the upper side and the lower side of the inner wall of the inner shell (5) relatively.

8. The very early aspirated pyrolytic particle fire detector of claim 1, wherein: the front side embedding of main casing body (1) has display screen (23) and the button group (24) of being connected with the control system electricity, and the front and back side of main casing body (1) all is equipped with louvre (25).

9. The very early aspirated pyrolytic particle fire detector of claim 8, wherein: an alarm (26) electrically connected with a control system is also arranged in the main shell (1).

10. The very early aspirated pyrolytic particle fire detector of claim 9, wherein: the outer edge of the main shell (1) is provided with a fixing screw hole (27).