CN216986150U

CN216986150U - Pipeline fire-fighting system

Info

Publication number: CN216986150U
Application number: CN202220564350.0U
Authority: CN
Inventors: 黄顺建
Original assignee: Shenzhen Qinjian Industrial Co ltd
Current assignee: Shenzhen Qinjian Industrial Co ltd
Priority date: 2022-03-15
Filing date: 2022-03-15
Publication date: 2022-07-19
Anticipated expiration: 2032-03-15

Abstract

The utility model discloses a pipeline fire-fighting system, and relates to the technical field of pipeline fire-fighting. The system comprises a main pipeline provided with an air inlet and an air outlet, wherein the air outlet of the main pipeline is communicated with the outside through an exhaust fan, and the air inlet of the main pipeline is communicated with the inside of a room; the fire extinguishing device further comprises a control unit, the control unit is connected with a spray header, the spray header comprises a plurality of first spray headers, the first spray headers are connected with a pressure tank, and the first spray headers are used for spraying fire extinguishing agents. The pipeline fire-fighting system detects the temperature of the main pipeline through the temperature sensor, the second spray head is used for spraying water for cooling, if oil dirt in the pipeline is burnt, the first spray head can be used for spraying fire extinguishing agent for extinguishing fire, the pipeline fire-fighting system is safe and reliable, and the fire extinguishing difficulty is reduced; a drainage groove is arranged between the main pipeline and the fume hood to prevent water in the main pipeline from entering the fume hood and further protect the fume hood; this pipeline fire extinguishing system adopts the mode of thing networking, has improved the fire control safety of pipeline, reduces the loss that the conflagration caused.

Description

Pipeline fire-fighting system

Technical Field

The utility model belongs to the technical field of pipeline fire fighting, and particularly relates to a pipeline fire fighting system.

Background

The pipeline fire-fighting requirements are met in the industries of air exhaust and smoke exhaust in markets, air exhaust in laundry factories, catering oil smoke pipelines, glue discharge and air exhaust in factories, warehouses and the like, indoor dust and oil smoke can be exhausted outdoors through the pipelines, and the indoor air is well purified; however, the pipeline is not cleaned for a long time or not cleaned in place, so that fire disasters can occur; in particular to an oil smoke pipeline in the catering industry, as a large amount of oil smoke is generated in the cooking process of a kitchen, when the oil smoke pipeline discharges the oil smoke, part of oil stain is attached to the inside of the oil smoke pipeline; the highest temperature of the oil smoke can reach 200 ℃, and under the action of the exhaust fan, the flame of the gas stove can be sucked into the smoke tube, so that the temperature of the smoke tube is accumulated, and a fire disaster is easily caused.

Meanwhile, except that the oil smoke outlet of the oil smoke exhaust pipeline devices is communicated with the outside, the rest parts of the oil smoke exhaust pipeline devices are sealed narrow and long spaces, so that when oil stains in the oil smoke pipeline are burnt, the fire can be rapidly spread by utilizing the chimney effect, and the fire is wrapped in the smoke channel after the fire is caught. The fire in the oil smoke pipeline is difficult to extinguish by the outside staff and even the fire alarm staff, and under the condition that the fire in the oil smoke pipeline cannot be extinguished, the fire in the smoke pipeline can repeatedly ignite near combustible substances, even the fire is easy to explode, and great threat is generated to surrounding staff and buildings. When the pipeline is burnt, the spraying distance of water is far away, so that the fire can be extinguished only by adopting water inside the pipeline, but the water is sprayed onto the oil because the oil is lighter than the water, the water cannot cover the oil and is totally sunk below the oil layer, so that the source of oxygen cannot be isolated, the water flows, the water can float and carry the burning oil to flow around, the burning range is enlarged, the contact area of fire and air is increased, and the fire is more and more vigorous.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of the existing exhaust pipelines of hotels, catering and warehouses, and provides a pipeline fire-fighting system which is safe and reliable, can achieve a better cooling and fire-extinguishing effect, is convenient to drain and can monitor the internal state of the pipeline in real time.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

a pipeline fire-fighting system comprises a main pipeline provided with an air inlet and an air outlet, wherein the air outlet of the main pipeline is communicated with the outside through an exhaust fan, and the air inlet of the main pipeline is communicated with the inside of a room; the control unit is connected with a spray head, and the spray head is used for cooling or extinguishing fire in the main pipeline; the spray header comprises a plurality of first spray headers, the first spray headers are connected with pressure tanks, and the first spray headers are used for spraying fire extinguishing agents.

Preferably, the control unit is connected with a camera, and the camera is used for monitoring the internal state information of the main pipeline and transmitting the internal state information to the control unit.

Preferably, the lateral wall intercommunication of trunk line has the holding pipeline that is used for holding the camera, the relative trunk line of holding pipeline sets up perpendicularly or sets up towards the air exit direction, the holding pipeline can avoid the oil smoke to corrode the camera.

Preferably, one end of the accommodating pipeline is communicated with the main pipeline, and the other end of the accommodating pipeline is provided with an access door which can be opened and closed.

Preferably, the control unit is connected with a cloud server, and the cloud server is connected with a terminal device.

Preferably, a temperature sensor is arranged inside the main pipeline and connected with the control unit; the spray header comprises a plurality of second spray headers, the second spray headers are connected with an external water pipe, and the second spray headers are used for spraying water.

Preferably, the control unit is further connected with a temperature alarm, and the temperature alarm is located indoors.

Preferably, a proportional mixer is arranged between the first spray head and the pressure tank, the proportional mixer is communicated with an external water pipe, and the proportional mixer is used for mixing water and the fire extinguishing agent.

Preferably, a first opening is formed in one end, connected with the water pipe, of the proportional mixer, a second opening is formed in one end, connected with the first spray header, of the proportional mixer, and the pressure tank is communicated with the side wall of the proportional mixer; the aperture of the first opening is smaller than the inner diameter of the proportional mixer, the second opening is a conical hole, and the minimum aperture of the second opening is smaller than the inner diameter of the proportional mixer.

Preferably, the second opening extends to the interior of the proportioner through a hollow extension tube.

Preferably, the control unit is connected with a pressure sensor, and the pressure sensor is used for detecting the pressure of the water pipe and/or the pressure tank.

Preferably, the air intake connection of trunk line has the oil smoke cover, the intercommunication has the water drainage tank between trunk line and the oil smoke cover, the water drainage tank passes through water piping connection with the external world, be connected with the valve between water drainage tank and the drain pipe.

Preferably, a liquid level detector connected with the control unit is arranged in the drainage groove.

Preferably, the inner wall of the main pipe is provided with a stop ring, and the stop ring is positioned between the drainage groove and the fume hood.

Preferably, the drain pipe is connected to the side wall of the drain tank, and one end of the drain pipe connected to the drain tank is of an inverted U-shaped structure.

Preferably, the valve is a Y-shaped three-way valve.

Compared with the prior art, the utility model has the beneficial effects that: the pipeline fire-fighting system detects the temperature of the main pipeline through the temperature sensor, the second spray head is used for spraying water for cooling, if oil dirt in the pipeline is burnt, the first spray head can be used for spraying fire extinguishing agent for fire extinguishing, the pipeline fire-fighting system is safe and reliable, the fire extinguishing convenience is improved, and the fire extinguishing difficulty is reduced; meanwhile, a camera is arranged in the fire fighting pipeline, and the state in the main pipeline can be checked in real time through the camera; a drainage groove is arranged between the main pipeline and the fume hood to prevent water in the main pipeline from entering the fume hood, so that drainage is facilitated, and the fume hood is further protected; the control unit is connected with the terminal equipment through the cloud server, so that a user can conveniently remotely check camera shooting information on the terminal equipment, and the spray head is controlled to be opened in time; meanwhile, the pipeline fire-fighting system is widely applied and is suitable for ventilating pipelines or oil smoke exhaust pipelines in hotel, catering, factories and warehouse industries.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a ducted fire protection system according to an embodiment of the present invention;

fig. 2 is a sectional view of a drain groove portion of a main pipe in an embodiment of the present invention;

FIG. 3 is a structural view of a drain portion of a main pipe in another embodiment of the present invention;

FIG. 4 is a structural view of a drain portion of a main pipe in a further embodiment of the present invention;

FIG. 5 is a block diagram of a proportioner in an embodiment of the utility model;

FIG. 6 is a schematic illustration of the installation of a fire protection system for a pipeline in an embodiment of the utility model;

in the figure: 1-position oil smoke cover, 2 is a main pipeline, 201 is a drainage groove, 202 is a stop ring, 203 is an upper step, 204 is a lower step, 205 is a baffle plate, 206 is a spring, 3 is an exhaust fan, 4 is a water pipe, 5 is a first spray head, 6 is a second spray head, 7 is a pressure tank, 8 is a camera, 9 is a containing pipeline, 10 is a water valve, 11 is a drainage pipe, 12 is a server, 13 is a valve, 131 is a first pipeline, 132 is a second pipeline, 133 is a first switch, 134 is a second switch, 14 is a control unit, 15 is a proportional mixer, 151 is a connecting part, 152 is a first opening, 153 is a second opening, 154 is a mixing pipe, 155 is a third through hole, 156 is a mixing cavity, 16 is a water pipe, and 17 is a temperature sensor.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.

In the description of the present application, it is to be understood that the terms "intermediate," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In addition, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that there may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1: referring to fig. 1-4, various air exhaust and oil smoke exhaust pipelines are generally installed in hotel, catering and warehouse industries, and can exhaust indoor dust and oil smoke to the outdoor through the pipelines, so that the indoor air is well purified; however, the pipeline is not cleaned for a long time or not cleaned in place, so that fire disasters can occur; in particular to an oil smoke pipeline in the catering industry, because a large amount of oil smoke is generated in the cooking process of a kitchen, when the oil smoke pipeline is discharged, part of oil stain is attached to the inside of the oil smoke pipeline, and under the action of an exhaust fan, the flame of a gas stove is sucked into the smoke pipeline, so that the temperature of the smoke pipeline is accumulated, and a fire disaster is easily caused; however, because the interior of the pipeline is relatively closed, if the interior of the pipeline is burnt, the condition inside the pipeline is difficult to observe, and the fire extinguishing difficulty is high. The utility model provides a pipeline fire extinguishing system can be applied to exhaust pipe and oil extraction cigarette pipeline, has reduced the loss of putting out a fire the degree of difficulty and having avoided causing because of the pipeline conflagration. The pipeline fire-fighting system can be applied to fire-fighting pipelines such as market exhaust smoke, laundry exhaust, catering oil smoke pipelines, factory glue exhaust smoke, warehouses and the like, and comprises a main pipeline 2 provided with an air inlet and an air outlet, wherein the air outlet of the main pipeline 2 is communicated with the outside through an exhaust fan 3, the air inlet of the main pipeline 2 is communicated with the inside of a room, in the embodiment, the air inlet is connected with an oil smoke cover 1 of a kitchen, indoor dust and oil smoke are exhausted to the outside under the action of the exhaust fan 3, so that indoor air is purified, the pipeline fire-fighting system also comprises a control unit, the control unit can be arranged inside the main pipeline 2 or outside the main pipeline 2, and is connected with a spray head, and the inside of the main pipeline 2 can be cooled or put out a fire through the spray head; the spray header comprises a plurality of first spray headers 5, the quantity of the first spray headers 5 can be selected according to the length of the main pipeline 2, one end of each first spray header 5 is positioned in the main pipeline 2, the other end of each first spray header is connected with a pressure tank 7, the pressure tank 7 is positioned outside the main pipeline 2, the first spray headers 5 are used for spraying fire extinguishing agents into the main pipeline 2, in the embodiment, as the oil smoke is ignited, the fire extinguishing agents are foams, two containers, namely an inner cylinder and an outer cylinder, are arranged in the pressure tank 7 and respectively contain two liquids, namely aluminum sulfate and sodium bicarbonate solution, the aluminum sulfate is arranged in the inner cylinder, the sodium bicarbonate solution is arranged in the outer cylinder, the two solutions are not in contact with each other, when the main pipeline 2 is ignited, the switch of the pressure tank 7 is opened, the two solutions are mixed together, a large amount of foams and carbon dioxide gas can be generated, thereby achieving the purpose of fire extinguishing, compared with the traditional method that a water pipe is directly adopted for spraying the interior of a pipeline, this structure fire extinguishing effect is good, and is more convenient, has avoided water to float simultaneously and has taken the oil of burning to scurry everywhere, enlarges combustion range, and of course, in other embodiments, the fire extinguishing agent still can be other special chemicals of putting out a fire.

Specifically, as shown in fig. 1, the control unit is connected with a cloud server 12, and the cloud server 12 is connected with a terminal device 14. In this embodiment, the terminal device 14 includes a PC client and a mobile client, and the unit can be remotely operated through the terminal device 14, so as to control the first spraying head 5 to spray the foam into the main pipe 2, and the controller and the cloud server 12 may adopt a GPRS transmission mode.

Specifically, the control unit is connected with a camera 8, and the camera 8 is used for monitoring the internal state information of the main pipeline 2 and transmitting the internal state information to the control unit. In this embodiment, the lateral wall intercommunication of trunk line 2 has the holding pipeline 9 that is used for holding camera 8, and holding pipeline 9 sets up perpendicularly or sets up towards the air exit direction relative trunk line 2, and holding pipeline 9 can set to "L" shape structure, and holding pipeline 9 can avoid the oil smoke to corrode camera 8. The quantity of camera 8 is one or more, and because the position temperature of the air intake of trunk line 2 is higher, therefore holding pipeline 9 can set up in the air intake department of trunk line 2 to carry out the state to the air intake and detect, because the oil smoke gets into along the air intake, the air exit discharges, holding pipeline 9 sets up perpendicularly or the slope of orientation air exit direction relatively trunk line 2 sets up, in order to avoid the oil smoke to cover or corrode camera 8. In a specific embodiment, holding pipeline 9 can be square pipeline or circular pipeline, and holding pipeline 9 one end and trunk line 2 intercommunication are as an organic whole, and the other end of holding pipeline 9 is equipped with the access door that can open and shut, and the access door can close with holding pipeline 9 lid and be connected, threaded connection or hinge connection, can regularly overhaul or maintain camera 8 through the access door.

Specifically, a temperature sensor is arranged inside the main pipeline 2 and is connected with the control unit; the temperature sensor setting mode is the same with the camera, shelters from the temperature sensor probe for avoiding the oil smoke to corrode, and temperature sensor sets up in the pipeline that holds towards the air exit direction. The spray header comprises a plurality of second spray headers 6, the second spray headers 6 are connected with external water pipes 4, the water pipes 4 are provided with water valves 10, and the second spray headers 6 are controlled to spray water by opening the water valves 10. In this embodiment, the number of the temperature sensors is one or more, and since the temperature at the position of the air inlet of the main pipe 2 is high, the temperature sensors can be arranged at the position of the air inlet, so as to detect the temperature of the oil smoke entering the main pipe 2, transmit the information of the temperature detection to the control unit, and transmit the information of the temperature detection to the terminal device 14 through the control unit, so that the terminal device 14 can conveniently check the information; the quantity of second shower head 6 can be selected according to the length of

trunk line

2, 6 one ends of second shower head are located trunk line 2, the other end is connected with external water pipe 4, but second shower head 6 blowout water smoke, when temperature sensor detects that the temperature in trunk line 2 is greater than or equal to the default, the steerable second shower head 6 blowout water smoke of the control unit to lower the temperature in trunk line 2, reduce the possibility of the dirty burning of oil in trunk line 2, the default temperature can be set for 100 degrees centigrade. In a specific embodiment, the spray header can be controlled to work in a manual or automatic mode, and the automatic control mode is as follows: when the control unit receives that the temperature sensor detects that the temperature in the main pipeline 2 is greater than or equal to a preset value, the control unit can automatically control the second spray header 6 to spray water mist; the manual control mode is as follows: when the control unit receives that the temperature sensor detects that the temperature in the main pipeline 2 is greater than or equal to the preset value, the temperature information is transmitted to the terminal equipment 14, and the water valve 10 is manually controlled by an operator to control the second spray header 6 to work. Specifically, the control unit still is connected with the temperature alarm, and the temperature alarm is located indoorly, if adopt the work of manual control mode control shower head, when the control unit received temperature sensor and detected the temperature in trunk line 2 and be greater than or equal to the default, the temperature alarm sent the prompt tone, reminded operating personnel to cool down trunk line 2. If the main pipeline 2 is on fire, an operator can check the shooting state of the camera 8 through the terminal equipment 14, so that the adjacent first spray heads 5 are controlled to spray foam, and the first spray heads 5 can also be controlled by the terminal equipment 14. The control unit is connected with pressure sensor, and pressure sensor is used for detecting water pipe 4 and/or pressure tank 7 pressure, and if the pressure that pressure sensor detected is higher than or be less than when predetermineeing the threshold value, the control unit can transmit pressure information to terminal equipment 14 to remind operating personnel to carry out the pressure regulating.

Specifically, the air intake connection of trunk line 2 has lampblack cover 1, for preventing that the water that second shower head 6 sprays out from flowing back to lampblack cover 1, leads to damaging lampblack cover 1, and the intercommunication has water drainage tank 201 between trunk line 2 and the lampblack cover 1 in this embodiment, and water drainage tank can be used to block the direct inflow lampblack cover of fire-fighting extinguishing medium, branch pipe or mechanical equipment department, avoids causing secondary pollution or accident. Water drainage tank 201 is connected with external drain pipe 11, and water drainage tank 201 bottom is equipped with the delivery port, makes water drainage tank 201 and drain pipe 11 intercommunication, and the water accessible drain pipe 11 trunk line 2 that second shower head 6 sprayed out is connected with valve 13 between water drainage tank 201 and the drain pipe 11, after second shower head 6 sprays into water smoke in to trunk line 2, can gather in water drainage tank 201, through the opening and closing of manual control valve 13, discharges the water in water drainage tank 201. In this embodiment, be equipped with the liquid level detection appearance of being connected with the control unit in the water drainage tank 201, the liquid level detection appearance can be used to detect the water level height in the water drainage tank 201 to with information transmission to the control unit, the control unit conveys to terminal equipment 14, and the operating personnel of being convenient for looks over water level height remotely.

In another embodiment, as shown in fig. 2, the water outlet further comprises a blocking piece 205, the inner wall of the water outlet is provided with an upper step 203 portion and a lower step 204 portion, the lower step 204 portion is provided with a compressed spring 206, the blocking piece 205 is installed between the spring 206 and the upper step 203 portion, and the radius of the blocking piece 205 is smaller than that of the water outlet and larger than that of the upper step 203 portion. When no water exists in the drainage groove 201, the baffle sheet 205 is propped against the upper step 203 under the action of the compressed spring 206 to seal the water outlet, and oil stains cannot be discharged from the water outlet; when the accumulated water in the water separating tank reaches a certain degree, the baffle sheet 205 is pressed towards the lower step 204 under the action of gravity of the accumulated water, a gap exists between the baffle sheet 205 and the inner wall of the water outlet, and the accumulated water can flow out from the gap.

In order to further prevent the water on the inner wall of the main pipe 2 from flowing back to the lampblack hood 1, the inner wall of the pipe is provided with a stop ring 202, the stop ring 202 is located between the drainage groove 201 and the lampblack hood 1, when the water flows back to one side of the stop ring 202, the water flows to the drainage groove 201 due to gravity, the cross section of the stop ring 202 can be square or triangular, in the embodiment, the cross section of the stop ring 202 is triangular, and the stop ring is inclined from the air inlet to the air outlet, as shown in fig. 2, the structure can reduce the air exhaust resistance and can also prevent the water from flowing back.

Because partial oil stain flows back to the drainage groove 201 when the main pipeline is in a normal state, in order to prevent the drainage groove 201 from being blocked by the oil stain, the valve 13 in this embodiment is a Y-shaped three-way valve, as shown in fig. 3, the Y-shaped three-way valve includes a first pipeline 131, a second pipeline 132, a first switch 133 for controlling the communication of the first pipeline 131 and a second switch 134 for controlling the communication of the second pipeline 132, the first pipeline 131 can be connected with a container for collecting the oil stain, the second pipeline 132 can be connected with a drainage pipe, when in the normal state, the second spray head 6 is closed, at this time, the first pipeline 133 is opened, the second pipeline 132 is closed, the oil stain is collected conveniently, and the oil stain is prevented from entering the drainage pipe 11 to cause blocking as much as possible; if the temperature in the main pipeline 2 exceeds the preset value, the second spray header 6 is opened to spray water, at the moment, the first pipeline is closed, the second pipeline is opened, and the water sprayed by the second spray header 6 is discharged from the water discharge pipe along the second pipeline 132.

In another embodiment, as shown in fig. 4, the drainage pipe is connected to the side wall of the drainage channel, one end of the drainage pipe connected to the drainage channel is of an inverted "U" shape, the bottom of the drainage channel can be connected with an oil smoke collection container, when the first spray head and the second spray head work, sprayed water or fire extinguishing agent enters the drainage channel, when the water level reaches a certain height, the water can be discharged from the drainage pipe, the U-shaped structure is set to have the advantages of preventing oil smoke or flames from flowing out of the pipeline, isolating air, reducing fire loss, facilitating drainage and safely draining.

The pipeline fire-fighting system detects the temperature of the main pipeline 2 through the temperature sensor, and adopts the second spray heads 6 to spray water for cooling, so that the probability of oil pollution combustion in the main pipeline 2 is reduced; if oil stain in the pipeline is burnt, the first spray head 5 can be adopted to spray the fire extinguishing agent for fire extinguishing, so that the fire extinguishing device is safe and reliable, the convenience of fire extinguishing is improved, and the difficulty of fire extinguishing is reduced; meanwhile, a camera 8 is arranged in the fire fighting pipeline, and the state in the main pipeline 2 can be checked in real time through the camera 8; a drainage groove 201 is arranged between the main pipeline 2 and the fume hood 1 to prevent water in the main pipeline from entering the fume hood 1, so that drainage is facilitated, and the fume hood 1 is further protected; the control unit is connected with the terminal equipment 14 through the cloud server 12, so that a user can conveniently remotely check the camera 8 on the terminal equipment 14 to start the spray head in time, and the pipeline fire-fighting system adopts the mode of the Internet of things, so that the fire-fighting safety of a pipeline is improved, and the loss caused by fire is reduced; meanwhile, the pipeline fire-fighting system is widely applied and is suitable for ventilating pipelines or oil smoke exhaust pipelines in hotel, catering, factories and warehouse industries.

Example 2: as shown in fig. 5, different from the above embodiment, a proportional mixer 15 is disposed between the first spray header and the pressure tank, one end of the proportional mixer 15 is detachably and hermetically connected with the water pipe through a connecting portion 151, and the connecting manner may be a threaded connection; the other end of the proportioner 15 is connected to a first sprinkler head, and the proportioner 15 is used for mixing water and fire extinguishing agent.

In this embodiment, one end of the proportional mixer 15 connected to the water pipe is provided with a first opening 152, one end of the proportional mixer 15 connected to the first spray head is provided with a second opening 153, a hollow mixing chamber 156 is formed inside the proportional mixer 15, the mixing chamber 156 is communicated with the first opening 152 and the second opening 153, the pressure tank is detachably connected to the side wall of the proportional mixer 15 and communicated with the mixing chamber 156, the connection mode can adopt a threaded sealing connection, specifically, the side wall of the mixing chamber 156 is provided with a third through hole 155 communicated with the mixing chamber 156, and the pressure tank is communicated with the mixing chamber 156 through the third through hole 155. Further, the aperture of the first opening 152 is smaller than the inner diameter of the proportional mixer 15, the second opening 153 is a tapered hole, the end of the second opening 153 close to the mixing chamber 156 is the smallest aperture, the smallest aperture of the second opening 153 is smaller than the inner diameter of the proportional mixer 15, the water flow in the water pipe firstly enters the mixing chamber 156 along the first opening 152 and flows out from the second opening 153, and because the flow rates of the first opening 152, the second opening 153 and the second opening 153 are larger, a smaller pressure is formed, and then the fire extinguishing agent in the pressure tank is sucked into the mixing chamber 156 and mixed, and finally is sprayed out from the second opening 153; in this embodiment, the fire suppressant is a foam.

Further, in order to achieve the mixing effect of water and the fire extinguishing agent, the second opening 153 extends to the inside of the proportional mixer 15 through the hollow extension pipe 154, when water in the water pipe enters the mixing chamber 156 along the first opening 152, the water can be fully mixed with the fire extinguishing agent due to the fact that the extension pipe 154 has a certain height, and then the water and the fire extinguishing agent are sprayed out along the extension pipe 154 and the second opening 153 in sequence, so that the water and the fire extinguishing agent achieve the fully mixed effect, and the fire extinguishing effect is further improved. Referring to fig. 6, which is a schematic installation diagram of the pipeline fire fighting system in the embodiment of the present application, two ends of the main pipeline 2 are respectively connected to the fume hood and the exhaust fan, the first spray header 5, the temperature sensor 17, and the camera 8 are disposed inside the main pipeline 2 and are respectively electrically connected to the control unit 14, and the control unit 14 controls the operation thereof, namely, the control box in fig. 6; the control unit 14 is also connected to an external water pipe 16 through an electromagnetic valve to control the water pipe 16 to open or close. The pipeline fire-fighting system adopts the mode of the Internet of things, so that the fire-fighting safety of the main pipeline 2 is improved, and the loss caused by fire is reduced; meanwhile, the pipeline fire-fighting system is widely applied and is suitable for ventilating pipelines or oil smoke exhaust pipelines in hotel, catering, factories and warehouse industries

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A pipeline fire-fighting system is characterized by comprising a main pipeline provided with an air inlet and an air outlet, wherein the air outlet of the main pipeline is communicated with the outside through an exhaust fan, and the air inlet of the main pipeline is communicated with the inside of a room; the control unit is connected with a spray head which is used for cooling or extinguishing fire in the main pipeline; the spray header comprises a plurality of first spray headers, the first spray headers are connected with pressure tanks, and the first spray headers are used for spraying fire extinguishing agents.

2. The fire fighting system according to claim 1, wherein a camera is connected to the control unit for monitoring and transmitting status information inside the main pipeline to the control unit.

3. The fire fighting system according to claim 2, wherein the side wall of the main pipe is communicated with a receiving pipe for receiving the camera, the receiving pipe is vertically arranged relative to the main pipe or arranged towards the direction of the air outlet, and the receiving pipe can prevent the camera from being corroded by oil smoke.

4. The fire fighting system according to claim 3, wherein one end of the accommodating pipe is communicated with the main pipe, and the other end of the accommodating pipe is provided with an access door which can be opened and closed.

5. The fire fighting system according to claim 2, wherein a cloud server is connected to the control unit, and a terminal device is connected to the cloud server.

6. A fire fighting system according to claim 1, characterized in that a temperature sensor is provided inside the main pipe, said temperature sensor being connected to a control unit; the spray header comprises a plurality of second spray headers, the second spray headers are connected with an external water pipe, and the second spray headers are used for spraying water.

7. The fire fighting system according to claim 1, wherein a proportional mixer is provided between the first spray header and the pressure tank, the proportional mixer being in communication with an external water pipe, the proportional mixer being for mixing water and fire extinguishing agent.

8. The fire fighting system according to claim 7, wherein a first opening is formed at one end of the proportional mixer connected to the water pipe, a second opening is formed at one end of the proportional mixer connected to the first spray header, and the pressure tank is communicated with the side wall of the proportional mixer; the aperture of the first opening is smaller than the inner diameter of the proportional mixer, the second opening is a conical hole, and the minimum aperture of the second opening is smaller than the inner diameter of the proportional mixer.

9. The fire fighting system of claim 8, wherein the second opening extends through a hollow extension tube to an interior of the proportioning mixer.

10. The pipeline fire-fighting system according to claim 1, wherein a fume hood is connected to an air inlet of the main pipeline, a drainage channel is communicated between the main pipeline and the fume hood, the drainage channel is connected with the outside through a drainage pipe, and a valve is connected between the drainage channel and the drainage pipe.