CN220344988U

CN220344988U - Annular pressure type compressed air foam fire extinguishing system

Info

Publication number: CN220344988U
Application number: CN202223573393.4U
Authority: CN
Inventors: 盛平; 殷穗锦
Original assignee: Jiangsu Yiwen Agroforestry Machinery Technology Co ltd
Current assignee: Jiangsu Yiwen Agroforestry Machinery Technology Co ltd
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2024-01-16
Anticipated expiration: 2032-12-31

Abstract

The utility model provides an annular pressure type compressed air foam fire extinguishing system, which is characterized in that the negative pressure generated by a negative pressure generating device is added on the basis of positive pressure generated by an original air pump, the negative pressure generating device adopts a venturi device, on the basis that the positive pressure generated by the air pump pushes out a foam bottle with large flow of foam liquid and is immersed into a conveying pipe, the venturi device is added to generate negative pressure to suck the large flow of foam liquid into the venturi device from the conveying pipe for mixing, and then the foam liquid is fed into a foam liquid mixing chamber for remixing, so that great suction force can be generated through the superposition of the positive pressure and the negative pressure, the liquid suction mixing can be effectively carried out on the large flow of foam liquid, the liquid suction efficiency is greatly improved, and the phenomenon that the foam liquid cannot be mixed and the water cannot be returned due to the insufficient positive pressure generated by the air pump is avoided.

Description

Annular pressure type compressed air foam fire extinguishing system

Technical Field

The utility model relates to foam fire extinguishing equipment, in particular to an annular pressure type compressed air foam fire extinguishing system.

Background

In order to enlarge the spraying area, the foam fire extinguishing system needs to spray high-flow foam, but in the current foam liquid mixing operation, the mode of discharging the foam liquid into a mixer from a foam bottle is generally to directly exhaust the foam bottle by adopting a hole press, positive pressure is generated after gas is discharged into the foam bottle, then the foam liquid is discharged into the mixer for mixing and foaming after being pressed out of the foam bottle, and the mode only can mix the foam liquid with small flow because the pressure of the positive pressure generated by the hole press is limited, so that the foam liquid with large flow cannot be completely absorbed into the mixer for mixing the foam liquid, the liquid absorption efficiency is lower, the water return phenomenon of the foam liquid is easy to occur when the liquid absorption is not timely, the foam liquid mixing and foaming efficiency is greatly influenced, and the fire extinguishing efficiency is also reduced.

Disclosure of Invention

The utility model provides an annular pressure type compressed air foam fire extinguishing system which can greatly improve the liquid suction efficiency aiming at high-flow foam mixing, thereby improving the foam liquid mixing and foaming efficiency.

The utility model adopts the following technical scheme: the annular pressure type compressed air foam fire extinguishing system mainly comprises a water pump, a foam liquid mixer, a foam pipe, a foam spray gun, a negative pressure generating device, an air pump and a foam bottle, wherein a water injection port foam liquid mixing chamber is sequentially arranged in the foam liquid mixer from front to back in the axial position, a water source storage unit is connected with a water inlet port of the water pump through a pipeline I, a water outlet port of the water pump is communicated with a water injection port through a pipeline II, and a shunt port is arranged on the side surface of the lower part of the water injection port; a water inlet pipeline is axially arranged in the foam liquid mixing chamber, the water inlet pipeline penetrates through the end face of one side of the foam liquid mixing chamber and stretches into the foam liquid mixing chamber, the water injection port is communicated with the foam liquid mixing chamber through the water inlet pipeline, the other side of the foam liquid mixing chamber is connected with one side of a foam pipe, the foam liquid mixing chamber is communicated with the foam pipe, and the outlet end of the other side of the foam pipe is connected with a foam spray gun; the output port of the air pump is divided into two branches, one of the air paths is communicated with an air inlet I on the side surface of the foam bottle, a liquid outlet on the upper part of the foam bottle and the shunt port are connected with the negative pressure generating device, a mixed liquid outlet of the negative pressure generating device is communicated with the inside of the foam liquid mixing chamber through a mixed liquid inlet arranged on the side surface of the lower part of the foam liquid mixing chamber, an air inlet passage combination is arranged at the joint of the other side of the foam liquid mixing chamber and one side of the foam pipe, and the other air path I is communicated with the inside of the foam liquid mixing chamber and the inside of the foam pipe through the air inlet passage combination.

Further, the negative pressure generating device is arranged as a venturi device, the venturi device mainly comprises a device main body, a water inlet and a mixed liquid outlet are respectively arranged on two sides of the device main body, a negative pressure liquid suction port is arranged at the bottom of the device main body, a venturi tube is axially arranged between the water inlet and the mixed liquid outlet and mainly comprises a contraction section and a diffusion section, a transition throat is arranged between the contraction section and the diffusion section, the negative pressure liquid suction port is communicated with the transition throat, a diversion port is communicated with the water inlet through a pipeline III, the water inlet is sequentially communicated with the mixed liquid outlet through the contraction section, the transition throat and the diffusion section, a liquid outlet at the upper part of the foam bottle is sequentially communicated with the negative pressure liquid suction port through a pipeline IV, the negative pressure liquid suction port is sequentially communicated with the mixed liquid outlet through the transition throat and the diffusion section, and the mixed liquid outlet of the device main body is sequentially communicated with the foam liquid mixing chamber through the mixed liquid inlet.

Further, the air outlets of the air pumps are Kong Yaji and Kong Yaji and are communicated with the air inlet I on the side face of the foam bottle through an air passage.

Further, the center of the water filling port, the center of the water inlet pipeline, the center of the foam liquid mixing chamber and the center of the foam pipe are on the same straight line.

Further, the center of the water inlet and the center of the contraction section, the center of the transition throat, the center of the diffusion section and the center of the mixed liquid outlet are on the same straight line.

Further, one side of the foaming pipe is provided with a connecting sleeve, the foaming pipe is fixedly connected with an end cover arranged on the outer surface of the other side of the foam liquid mixing chamber through the connecting sleeve after passing through the other side of the foam liquid mixing chamber, the air inlet passage combination mainly comprises an annular air passage, a conical narrow slit and an air inlet II, the annular air passage is positioned between the inner wall of the connecting sleeve and the outer surface of the foam liquid mixing chamber, the connecting sleeve is provided with the air inlet II which is communicated with the annular air passage, the end part of the other side of the foam liquid mixing chamber is provided with a conical surface I, the surface on the inner wall of the connecting sleeve, which corresponds to the conical surface I, is also provided with a conical surface II, a gap between the conical surface I and the conical surface II corresponds to the conical surface II, and the other air passage I sequentially passes through the air inlet II, the annular air passage and the conical narrow slit to the other side of the foam liquid mixing chamber and the foaming pipe.

Further, the pipe diameter of the water inlet pipeline is smaller than the inner diameter of the water injection port and the inner diameter of the foam liquid mixing chamber.

The utility model has the following beneficial effects: after the technical scheme is adopted, the negative pressure generated by the negative pressure generating device is increased on the basis of positive pressure generated by the original air pump, the negative pressure generating device adopts the venturi device, the venturi device is added on the basis that the positive pressure generated by the air pump pushes out the foam bottle of the high-flow foam liquid and is immersed into the conveying pipe, the negative pressure generated by the venturi device is added to suck the high-flow foam liquid into the venturi device from the conveying pipe to be mixed, and then the mixture is introduced into the foam liquid mixing chamber to be mixed again, so that great suction force can be generated through the superposition of the positive pressure and the negative pressure, the liquid suction mixing can be effectively carried out on the high-flow foam liquid, the liquid suction efficiency is greatly improved, and the phenomenon that the foam liquid cannot be mixed and the water returns due to insufficient positive pressure generated by the air pump is avoided. In addition, after the liquid suction mixing is finished, part of gas of the pore press can be extruded through the conical narrow slits to form quantitative directional high-pressure air flow which is discharged into the foaming pipe and collides with the foam mixed liquid in the foaming pipe to foam, so that the device is more convenient to use, the foaming pipe is not required to be exhausted and foamed by other devices, the foaming effect of the foam mixed liquid is improved, the quality of the produced foam liquid is good, and the fire extinguishing effect is improved.

In addition, the Venturi device for reconstruction is simple in structure and low in manufacturing cost, complicated pressurizing equipment is not needed to be additionally arranged, and reconstruction cost is greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged schematic view of the present utility model at a in fig. 1.

Description of the embodiments

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

In fig. 1 and 2, the utility model provides an annular pressure type compressed air foam fire extinguishing system, which mainly comprises a water pump 1, a foam liquid mixer 2, a foam pipe 3, a foam spray gun 4, a negative pressure generating device, an air pump 5 and a foam bottle 6, wherein a water filling port 7 and a foam liquid mixing chamber 8 are sequentially arranged in the foam liquid mixer 2 from front to back in the axial position, a water source storage unit 9 is connected with a water inlet port of the water pump 1 through a pipeline I10, a water outlet port of the water pump 1 is communicated with the water filling port 7 through a pipeline II 11, and a shunt port 12 is arranged on the side surface of the lower part of the water filling port 7; a water inlet pipeline 13 is axially arranged in the foam liquid mixing chamber 8, the water inlet pipeline 13 penetrates through the end face of one side of the foam liquid mixing chamber 8 and stretches into the foam liquid mixing chamber 8, the water filling port 7 is communicated with the foam liquid mixing chamber 8 through the water inlet pipeline 13, the other side of the foam liquid mixing chamber 8 is connected with one side of the foam pipe 3, the foam liquid mixing chamber 8 is communicated with the foam pipe 3, and the outlet end of the other side of the foam pipe 3 is connected with the foam spray gun 4; the output port of the air pump 5 is divided into two branches, one of which 14 is communicated with an air inlet I15 on the side surface of the foam bottle 6, a liquid outlet 16 and a shunt port 12 on the upper part of the foam bottle 6 are connected with a negative pressure generating device, a mixed liquid outlet 17 of the negative pressure generating device is communicated with the inside of the foam liquid mixing chamber 8 through a mixed liquid inlet 18 arranged on the side surface of the lower part of the foam liquid mixing chamber 8, an air inlet passage combination is arranged at the joint of the other side of the foam liquid mixing chamber 8 and one side of the foam tube 3, the other air passage I19 is communicated with the inside of the foam liquid mixing chamber 8 and the inside of the foam tube 3 through the air inlet passage combination, the negative pressure generating device of the embodiment is provided with a venturi device 20, the venturi device 20 mainly comprises a device main body 21, a water inlet 22 and a mixed liquid outlet 17 are respectively arranged on two sides of the device main body 21, a negative pressure liquid suction port 23 is arranged at the bottom of the device main body 21, a venturi tube is axially arranged between the water inlet 22 and the mixed liquid outlet 17, the venturi tube mainly comprises a contraction section 24 and a diffusion section 25, a transition throat 26 is arranged between the contraction section 24 and the diffusion section 25, a negative pressure liquid suction port 23 is communicated with the transition throat 26, a shunt port 12 is communicated with the water inlet 22 through a pipeline III 27, the water inlet 22 is communicated with the mixed liquid outlet 17 through the contraction section 24, the transition throat 26 and the diffusion section 25 in sequence, a liquid outlet 16 at the upper part of the foam bottle 6 is communicated with the negative pressure liquid suction port 23 through a pipeline IV 28, the negative pressure liquid suction port 23 is communicated with the mixed liquid outlet 17 through the transition throat 26 and the diffusion section 25 in sequence, the mixed liquid outlet 17 of the device main body 21 is communicated with the inside of the foam liquid mixing chamber 8 through the mixed liquid inlet 18, an air pump 5 of the embodiment is provided with Kong Yaji, an air outlet of Kong Yaji is communicated with an air inlet I15 at the side surface of the foam bottle 6 through an air passage 14, the center of the water injection port 7, the center of the water inlet pipe 13, the center of the foam liquid mixing chamber 8 and the center of the foam tube 3 are on the same straight line, the center of the water inlet 22 and the center of the contraction section 24, the center of the transition throat 26, the center of the diffusion section 25 and the center of the mixed liquid outlet 17 are on the same straight line, one side of the foam tube 3 of the embodiment is provided with a connecting sleeve 29, the foam tube 3 is fixedly connected with an end cover 30 arranged on the outer surface of the other side of the foam liquid mixing chamber 8 after passing through the connecting sleeve 29 on the other side of the foam liquid mixing chamber 8, the air inlet passage combination mainly comprises an annular air passage 31, a taper slit 32 and an air inlet II 33, the annular air passage 31 is positioned between the inner wall of the connecting sleeve 29 and the outer surface of the foam liquid mixing chamber 8, the air inlet II 33 is communicated with the annular air passage 31 on the connecting sleeve 29, the end part of the other side of the foam liquid mixing chamber 8 is provided with a taper surface I, the surface II is also provided with a taper surface II on the inner wall of the connecting sleeve 29 corresponding to the taper surface I, the taper surface I corresponds to the taper surface II, the taper surface I is communicated with the taper surface II and the air inlet 3 and the air inlet 33 is sequentially passes through the annular air passage 32 and the air inlet 33 and the air passage 33 is communicated with the air inlet 3 and the air passage 32. The pipe diameter of the water inlet pipe 13 of this embodiment is smaller than the inner diameter of the water injection port 7 and the inner diameter of the foam liquid mixing chamber 8.

The application process of the utility model is as follows: when a large flow of foam liquid needs to be mixed and foamed, the air pump 1 is started, compressed air is pumped after the air pump 1 starts to work, part of the compressed air is discharged into the foam bottle 6, the foam liquid is pressed out of the foam bottle 6 through positive pressure and then is conveyed to the pipeline IV 28, the water pump 1 sucks a water source into the water injection port 7 from the water source storage unit 9, part of water in the water injection port 7 enters the foam liquid mixing chamber 8 from the water inlet pipeline 13, the other part of water enters the venturi tube through the water inlet 22 after passing through the shunt port 12, negative pressure is generated by the venturi tube when the water passes through the venturi tube, the foam liquid in the pipeline IV 28 is re-absorbed by the negative pressure liquid suction port 23 through the negative pressure, a large amount of foam liquid is absorbed and mixed with the water in the venturi tube and then discharged into the foam liquid mixing chamber 8, the mixed foam liquid is mixed with the water in the foam liquid mixing chamber 8 after being mixed again, the foam liquid after being mixed again enters the foam tube 3, the other part of the compressed air pumped by the air pump 1 is also conveyed into the conical air inlet 33 and the annular air channel 31 through the air inlet 22 to the venturi tube to be extruded into the conical air channel 3, the foam liquid is discharged into the conical air channel 3 after being extruded into the air channel to be impacted and mixed with the air flow in a constant-pressure slot 35, and then discharged into the air flow channel 3 after being extruded into the air channel to be mixed in a constant direction, and discharged into the air channel after being formed into the air channel after being aligned with the air channel.

Without being limited thereto, any changes or substitutions that are not contemplated by the inventors are intended to be included within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. The annular pressure type compressed air foam fire extinguishing system is characterized by mainly comprising a water pump (1), a foam liquid mixer (2), a foam pipe (3), a foam spray gun (4), a negative pressure generating device, an air pump (5) and a foam bottle (6), wherein a water injection port (7) and a foam liquid mixing chamber (8) are sequentially arranged in the foam liquid mixer (2) from front to back at the axial position, a water source storage unit (9) is connected with a water inlet port of the water pump (1) through a pipeline I (10), a water outlet port of the water pump (1) is communicated with the water injection port (7) through a pipeline II (11), and a diversion port (12) is arranged on the side surface of the lower part of the water injection port (7); a water inlet pipeline (13) is axially arranged in the foam liquid mixing chamber (8), the water inlet pipeline (13) penetrates through the end face of one side of the foam liquid mixing chamber (8) and stretches into the foam liquid mixing chamber (8), the water inlet (7) is communicated with the foam liquid mixing chamber (8) through the water inlet pipeline (13), the other side of the foam liquid mixing chamber (8) is connected with one side of the foam pipe (3), the foam liquid mixing chamber (8) is communicated with the foam pipe (3), and the outlet end of the other side of the foam pipe (3) is connected with the foam spray gun (4); the output port of the air pump (5) is divided into two branches, one air passage (14) is communicated with an air inlet I (15) on the side surface of the foam bottle (6), a liquid outlet (16) on the upper part of the foam bottle (6) and a shunt port (12) are connected with a negative pressure generating device, a mixed liquid outlet (17) of the negative pressure generating device is communicated with the inside of the foam liquid mixing chamber (8) through a mixed liquid inlet (18) arranged on the side surface of the lower part of the foam liquid mixing chamber (8), an air inlet passage combination is arranged at the joint of the other side of the foam liquid mixing chamber (8) and one side of the foam pipe (3), and the other air passage I (19) is communicated with the inside of the foam liquid mixing chamber (8) and the inside of the foam pipe (3) through the air inlet passage combination.

2. The annular pressure type compressed air foam fire extinguishing system according to claim 1, wherein the negative pressure generating device is a venturi device (20), the venturi device (20) mainly comprises a device main body (21), a water inlet (22) and a mixed liquid outlet (17) are respectively arranged at two sides of the device main body (21), a negative pressure liquid suction port (23) is arranged at the bottom of the device main body (21), a venturi tube is axially arranged between the water inlet (22) and the mixed liquid outlet (17), the venturi tube mainly comprises a contraction section (24) and a diffusion section (25), a transition throat (26) is arranged between the contraction section (24) and the diffusion section (25), the negative pressure liquid suction port (23) is communicated with the transition throat (26), the diversion port (12) is communicated with the water inlet (22) through a pipeline III (27), the water inlet (22) is sequentially communicated with the mixed liquid outlet (17) through the contraction section (24), the transition throat (26) and the diffusion section (25), a liquid outlet (16) at the upper part of the foam bottle (6) is axially communicated with the negative pressure liquid suction port (23) through a pipeline IV (28), the negative pressure liquid suction port (23) is sequentially communicated with the liquid suction port (25) and the transition throat (17), the mixed liquid outlet (17) of the device main body (21) is communicated with the inside of the foam liquid mixing chamber (8) through the mixed liquid inlet (18).

3. The annular pressure type compressed air foam fire extinguishing system according to claim 1, wherein the air pump (5) is arranged such that the air outlets of the air pumps (5) are Kong Yaji, kong Yaji are communicated with the air inlet I (15) on the side surface of the foam bottle (6) through an air passage (14).

4. The annular pressure type compressed air foam fire extinguishing system according to claim 1, wherein the center of the water injection port (7), the center of the water inlet pipeline (13), the center of the foam liquid mixing chamber (8) and the center of the foaming pipe (3) are on the same straight line.

5. An annular pressure type compressed air foam fire extinguishing system according to claim 2, wherein the center of the water inlet (22) is collinear with the center of the constriction (24), the center of the transition throat (26), the center of the diffuser (25) and the center of the mixed liquor outlet (17).

6. The annular pressure type compressed air foam fire extinguishing system according to claim 1, wherein one side of the foaming tube (3) is provided with a connecting sleeve (29), the foaming tube (3) is fixedly connected with an end cover (30) arranged on the outer surface of the other side of the foam liquid mixing chamber (8) after passing through the other side of the foam liquid mixing chamber (8) through the connecting sleeve (29), the air inlet passage combination mainly comprises an annular air passage (31), a conical narrow slit (32) and an air inlet II (33), the annular air passage (31) is positioned between the inner wall of the connecting sleeve (29) and the outer surface of the foam liquid mixing chamber (8), the air inlet II (33) is opened on the connecting sleeve (29) and is communicated with the annular air passage (31), the end part of the other side of the foam liquid mixing chamber (8) is provided with a conical surface I, the surface corresponding to the conical surface I on the inner wall of the connecting sleeve (29), the conical surface I and the conical surface II are also provided with a conical narrow slit (32) corresponding to the conical surface I, and a gap between the conical surface I and the conical surface II is sequentially passing through the air inlet II (33) and the annular air passage II (31) and the foam liquid mixing chamber (8) and the inner surface of the foam liquid (3).

7. An annular pressure type compressed air foam fire extinguishing system according to claim 1, characterized in that the pipe diameter of the water inlet pipe (13) is smaller than the inner diameter of the water injection port (7) and the inner diameter of the foam liquid mixing chamber (8).