Gas-liquid mixer for compressed air foam fire extinguishing equipment
By designing the main mixer and the secondary mixer in the foam fire extinguishing equipment and performing three injections during the mixing process, the pressure imbalance during gas-liquid mixing is solved, the mixing effect is improved, and efficient and economical fire foam generation is achieved.
Patent Information
- Application Number
- CN202411956757.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-29
- Publication Date
- 2025-05-13
AI Technical Summary
In existing foam fire extinguishing equipment, pressure imbalance is prone to occur when gas and liquid mixing, resulting in disturbance in the gas and liquid transport in the mixer and affecting the mixing effect.
A gas-liquid mixer including a main mixer and a secondary mixer is designed, and three induced injections are performed during the mixing process through the induced injection channel, which balances the pressure changes and reduces the impact on the system and equipment.
It effectively prevents disturbances caused by gas-liquid mixing in the mixer, improves the mixing effect of foam liquid, and obtains a fire-fighting foam with uniform foaming, and is simple in structure, low in cost and convenient in operation.
Smart Images
Figure CN119971382A_ABST
Abstract
Description
Technical Field
[0001] The invention provides a mixer for fire extinguishing equipment, in particular to a gas-liquid mixer used in compressed air foam fire extinguishing equipment. Background Art
[0002] In the current foam fire extinguishing equipment, the gas flow, liquid flow and foam flow need to be mixed in a certain ratio, and the flow of these substances needs to be adjusted through sensors to control the servo motor, which is relatively expensive. Or the mixing is achieved through premixed liquid, but the premixed foam liquid is prone to deterioration after being placed for a long time, causing great waste. In addition, since the gas and liquid are in the pipe network when they are mixed, the gas and liquid are directly transported by pipelines, so there will be a pressure imbalance during transportation, which will cause pressure imbalance in the mixer, causing a great impact on the inside of the mixer, thereby disturbing the mixing work of the mixer and affecting the effect of foam liquid mixing. Summary of the invention
[0003] The invention provides a gas-liquid mixer used in compressed air foam fire extinguishing equipment, which can effectively prevent the gas-liquid mixing of the mixer from causing disturbance and improve the mixing effect of the foam liquid.
[0004] The present invention adopts the following technical scheme: a gas-liquid mixer for compressed air foam fire extinguishing equipment, which comprises a horizontally placed main mixer and a vertically placed auxiliary mixer, the auxiliary mixer is installed on the side of the main mixer, a main water inlet channel, a mixed liquid collection chamber, a main and auxiliary mixing chamber, a gas-liquid collection chamber and a gas-liquid mixing chamber are arranged in sequence from front to back in the main mixer, an auxiliary liquid inlet hole and an air inlet are arranged on the side of the main mixer, an auxiliary liquid inlet mixing channel is axially arranged in the auxiliary mixer, a foam liquid inlet is arranged on the side of the auxiliary mixer, a foam liquid storage bottle is connected to the foam liquid inlet through a flow regulating pump, and the foam liquid inlet is connected to the auxiliary mixer through an injection channel I in the auxiliary mixer. The liquid inlet mixing channels are connected, the auxiliary liquid inlet mixing channel axially penetrates the entire auxiliary mixer from head to tail, the tail of the auxiliary liquid inlet mixing channel is connected to the auxiliary liquid inlet hole, the auxiliary liquid inlet hole is connected to the mixed liquid collecting chamber through the injection channel II, the main water inlet channel is also connected to the mixed liquid collecting chamber, the outlet of the mixed liquid collecting chamber is connected to the inlet of the main and auxiliary mixing chambers, the air storage tank is connected to the air inlet, the air inlet is connected to the gas-liquid collecting chamber through the injection channel III, the outlet of the main and auxiliary mixing chambers is also connected to the gas-liquid collecting chamber, the outlet of the gas-liquid collecting chamber is connected to the inlet of the gas-liquid mixing chamber, and the outlet of the gas-liquid mixing chamber is connected to the foam liquid output channel of the main mixer.
[0005] Furthermore, the main water inlet channel, the mixed liquid collection chamber, the main and sub-mixing chambers, the gas-liquid collection chamber and the gas-liquid mixing chamber are located at the axial center of the main mixer, and the axial center line of the main water inlet channel, the axial center line of the mixed liquid collection chamber, the axial center line of the main and sub-mixing chambers, the axial center line of the gas-liquid collection chamber and the axial center line of the gas-liquid mixing chamber are on the same straight line with the axial center line of the main mixer.
[0006] Furthermore, the secondary liquid inlet mixing channel is located in the middle of the secondary mixer, and the axial center line of the secondary liquid inlet mixing channel is in the same straight line as the axial center line of the secondary mixer.
[0007] Furthermore, the main water inlet channel includes a main water inlet at the front, a tapered tube in the middle and a main water outlet at the rear. The main water inlet is connected to the tapered tube in the middle and the main water outlet at the rear in turn. The main water inlet is connected to the main water storage tank through a pipeline. The diameter of one end of the tapered tube in the middle is larger than that of the other end. The end with the larger diameter is connected to the main water inlet, and the other end with the smaller diameter is connected to the mixed liquid collection chamber through the main water outlet at the rear.
[0008] Furthermore, the auxiliary liquid inlet mixing channel includes an auxiliary water inlet at the front, a front conical water inlet pipe in the middle, a rear conical mixing tube and an auxiliary liquid outlet at the rear. The auxiliary water inlet at the front is connected with the front conical water inlet pipe in the middle, the rear conical mixing tube and the auxiliary liquid outlet at the rear in turn. The auxiliary water inlet is connected with the auxiliary water storage tank through a pipeline. The front conical water inlet pipe and the rear conical mixing tube both have a larger diameter at one end than the other end. The end with the larger diameter of the front conical water inlet pipe is connected with the auxiliary water inlet, the end with the smaller diameter of the front conical water inlet pipe is connected with the end with the smaller diameter of the rear conical mixing tube, and the end with the larger diameter of the rear conical mixing tube is connected with the auxiliary liquid inlet hole through the rear auxiliary liquid outlet.
[0009] Furthermore, the ejection channel I is configured as an annular conical channel inclined inwardly.
[0010] Furthermore, the ejection channel II is configured as an annular channel, and an inwardly inclined oblique outlet is configured at the junction of the ejection channel II and the mixed liquid collection chamber.
[0011] Furthermore, the ejection channel III is configured as an annular conical channel inclined inwardly.
[0012] Furthermore, the flow regulating pump is an electric pump.
[0013] The present invention has the following beneficial effects: after adopting the above technical scheme, the present invention adopts three ejection channels, and the three ejection channels are respectively arranged in the first mixing, the second mixing and the third mixing of the foam liquid. In this way, after three ejections, when the pressure at the inlet of the mixing chamber changes suddenly, each ejection can balance the pressure change, reduce the impact on the system and equipment, and prevent the mixing work of the mixer from being disturbed, effectively improving the effect of foam liquid mixing, so that uniformly foamed fire fighting foam can be obtained, and the structure is simple, the cost is low, and the operation is also convenient. The axial center line of the main water inlet channel of the present invention, the axial center line of the mixed liquid collection chamber, the axial center line of the main and auxiliary mixing chambers, the axial center line of the gas-liquid collection chamber, and the axial center line of the gas-liquid mixing chamber are in the same straight line with the axial center line of the main mixer, so that the smoothness of the mixing of gas, liquid and foam in the main mixing body can be ensured, and the mixing effect is improved. The axial center line of the auxiliary liquid inlet mixing channel of the present invention is in the same straight line with the axial center line of the auxiliary mixer, so that the smoothness of the mixing of liquid and foam in the auxiliary mixing body can be ensured, and the mixing effect is improved. The ejection channel I of the present invention is set as an annular conical channel inclined inwardly, the ejection channel II is set as an annular channel, an inwardly inclined oblique outlet is set at the junction of the ejection channel II and the mixed liquid collection chamber, and the ejection channel III is set as an inwardly inclined annular conical channel. The ejection channel of such structure is not only simple in structure and convenient in manufacture, but also can effectively be inclined between the channels, thereby increasing the generation of strong negative pressure and improving the ejection effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 It is a schematic diagram of the structure of the present invention.
[0016] Figure 2 It is a schematic diagram of the external structure of the present invention. DETAILED DESCRIPTION
[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0018] exist Figure 1As shown in the figure, the present invention provides a gas-liquid mixer for compressed air foam fire extinguishing equipment, which includes a horizontally placed main mixer 1 and a vertically placed auxiliary mixer 2, the auxiliary mixer 2 is installed on the side of the main mixer 1, and a main water inlet channel 3, a mixed liquid collection chamber 4, a main and auxiliary mixing chamber 5, a gas-liquid collection chamber 6 and a gas-liquid mixing chamber 7 are arranged in the main mixer 1 from front to back in sequence, an auxiliary liquid inlet hole 13 and an air inlet 14 are arranged on the side of the main mixer 1, an auxiliary liquid inlet mixing channel 8 is axially arranged in the auxiliary mixer 2, a foam liquid inlet 9 is arranged on the side of the auxiliary mixer 2, a foam liquid storage bottle 10 is connected to the foam liquid inlet 9 through a flow regulating pump 11, and the foam liquid inlet 9 is in the auxiliary mixer 2 through an ejection channel I 12 The auxiliary liquid inlet mixing channel 8 is connected to the auxiliary liquid inlet mixing channel 8, which axially penetrates the entire auxiliary mixer 2 from head to tail. The tail of the auxiliary liquid inlet mixing channel 8 is connected to the auxiliary liquid inlet hole 13, and the auxiliary liquid inlet hole 13 is connected to the mixed liquid collection chamber 4 through the injection channel II 15. The main water inlet channel 3 is also connected to the mixed liquid collection chamber 4, and the outlet of the mixed liquid collection chamber 4 is connected to the inlet of the main and auxiliary mixing chambers 5. The air storage tank 16 is connected to the air inlet 14, and the air inlet 14 is connected to the gas-liquid collection chamber 6 through the injection channel III 17. The outlet of the main and auxiliary mixing chambers 5 is also connected to the gas-liquid collection chamber 6, and the outlet of the gas-liquid collection chamber 6 is connected to the inlet of the gas-liquid mixing chamber 7, and the outlet of the gas-liquid mixing chamber 7 is connected to the foam of the main mixer 1. The liquid output channel 18 is connected. The main water inlet channel 3, the mixed liquid collection chamber 4, the main and sub-mixing chambers 5, the gas-liquid collection chamber 6 and the gas-liquid mixing chamber 7 used in this embodiment are located at the axial center of the main mixer 1, and the axial center line of the main water inlet channel 3, the axial center line of the mixed liquid collection chamber 4, the axial center line of the main and sub-mixing chambers 5, the axial center line of the gas-liquid collection chamber 6 and the axial center line of the gas-liquid mixing chamber 7 are in the same straight line with the axial center line of the main mixer 1. The sub-liquid inlet mixing channel 8 used in this embodiment is located in the middle position of the sub-mixer 2, and the axial center line of the sub-liquid inlet mixing channel 8 is in the same straight line with the axial center line of the sub-mixer 2. The main water inlet channel 3 used in this embodiment includes a main water inlet 19 at the front, a middle The conical tube 20 at the front and the main water outlet 21 at the rear, the main water inlet 19 is connected with the conical tube 20 in the middle and the main water outlet 21 at the rear in turn, the taper of the conical tube 20 in the middle is 10°, the main water inlet 19 is connected with the main water storage tank 22 through a pipeline, the diameter of one end of the conical tube 20 in the middle is larger than the diameter of the other end, the end with the larger diameter is connected with the main water inlet 19, and the other end with the smaller diameter is connected with the mixed liquid collection chamber 4 through the main water outlet 21 at the rear. The auxiliary liquid inlet mixing channel 8 used in this embodiment includes an auxiliary water inlet 23 at the front, a front conical water inlet pipe 24 in the middle, a rear conical mixing pipe 25 and a rear auxiliary liquid outlet 26, the taper of the front conical water inlet pipe 24 is 10°, and the taper of the rear conical mixing pipe 25 is 12°.The auxiliary water inlet 23 at the front is connected with the front conical water inlet pipe 24, the rear conical mixing pipe 25 and the auxiliary liquid outlet 26 at the rear inlet in sequence. The auxiliary water inlet 23 is connected with the auxiliary water storage tank 27 through a pipeline. The diameter of one end of the front conical water inlet pipe 24 and the rear conical mixing pipe 25 is larger than that of the other end. The end with the larger diameter of the front conical water inlet pipe 24 is connected with the auxiliary water inlet 23, the end with the smaller diameter of the front conical water inlet pipe 24 is connected with the end with the smaller diameter of the rear conical mixing pipe 25, and the end with the larger diameter of the rear conical mixing pipe 25 is connected with the auxiliary water inlet through the rear auxiliary liquid outlet 26. The liquid hole 13 is connected, the ejection channel I12 used in this embodiment is set as an annular conical channel inclined inwardly, and the taper angle of the annular conical channel is 40°. The ejection channel II15 used in this embodiment is set as an annular channel, and the junction of the ejection channel II15 and the mixed liquid collection chamber 4 is set as an inwardly inclined oblique outlet 28, and the inclination angle of the oblique outlet 28 is 35°. The ejection channel III17 used in this embodiment is set as an annular conical channel inclined inwardly, and the taper angle of the conical channel is 30°. The flow regulating pump 11 used in this embodiment is an electric pump.
[0019] The specific method of using the present invention is as follows: after the water pump of the present invention pumps water out, the water enters the main water inlet channel 3 through the main water inlet 19, and then enters the mixed liquid collection chamber 4 through the main water inlet channel 3. At the same time, the foam liquid is pumped from the foam liquid storage bottle 10 by the electric flow regulating pump 11 and enters the auxiliary mixer through the foam liquid inlet 9. The flow regulating pump 11 can realize the flow regulation of the foam liquid. Under the action of the injection channel I 12, negative pressure is generated to suck the foam liquid into the auxiliary liquid inlet mixing channel 8, and the water entering from the auxiliary water inlet 23 and the front conical water inlet pipe 24 in the middle is mixed in the rear conical mixing pipe 25, and then enters the main mixer 1 through the auxiliary liquid inlet hole 13, and enters after the injection of the injection channel II 15. The foam mixed liquid enters the mixed liquid collection chamber 4 and is collected with the water flow entering the main water inlet channel 3, and then enters the main and auxiliary mixing chambers 5 for mixing and stirring to form a foam mixed liquid, which enters the gas-liquid collection chamber 6. At the same time, air also enters the main mixer 1 from the air inlet, and is adsorbed into the gas-liquid collection chamber 6 under the injection of the injection channel III 17. Then, the air and the foam mixed liquid are stirred and foamed in the gas-liquid mixing chamber 7 to form fire extinguishing foam, which is transported to the foam gun through the foam liquid output channel 18 of the main mixer 1 and sprayed out by the foam gun. After three injections, the pressure change during injection can be effectively balanced due to the injection effect, reducing the impact of gas or liquid on the equipment, and has a high anti-interference ability.
[0020] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.
Claims
1. A gas-liquid mixer for compressed air foam fire extinguishing equipment, characterized in that The invention comprises a main mixer (1) placed horizontally and a sub-mixer (2) placed vertically. The sub-mixer (2) is installed on the side of the main mixer (1). A main water inlet channel (3), a mixed liquid collecting chamber (4), a main and sub-mixing chamber (5), a gas-liquid collecting chamber (6) and a gas-liquid mixing chamber (7) are arranged in sequence from front to back in the main mixer (1). A sub-liquid inlet hole (13) and an air inlet (14) are arranged on the side of the main mixer (1). A sub-liquid inlet mixing channel (8) is arranged axially in the sub-mixer (2). A foam liquid inlet (9) is arranged on the side of the sub-mixer (2). A foam liquid storage bottle (10) is connected to the foam liquid inlet (9) through a flow regulating pump (11). The foam liquid inlet (9) is connected to the sub-liquid inlet mixing channel (8) through an ejection channel I (12) in the sub-mixer (2). (8) axially penetrates the entire interior of the auxiliary mixer (2) from head to tail, the tail of the auxiliary liquid inlet mixing channel (8) is connected to the auxiliary liquid inlet hole (13), the auxiliary liquid inlet hole (13) is connected to the mixed liquid collecting chamber (4) through the injection channel II (15), the main water inlet channel (3) is also connected to the mixed liquid collecting chamber (4), the outlet of the mixed liquid collecting chamber (4) is connected to the inlet of the main and auxiliary mixing chambers (5), the air storage tank (16) is connected to the air inlet (14), the air inlet (14) is connected to the gas-liquid collecting chamber (6) through the injection channel III (17), the outlet of the main and auxiliary mixing chambers (5) is also connected to the gas-liquid collecting chamber (6), the outlet of the gas-liquid collecting chamber (6) is connected to the inlet of the gas-liquid mixing chamber (7), and the outlet of the gas-liquid mixing chamber (7) is connected to the foam liquid output channel (18) of the main mixer (1).
2. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The main water inlet channel (3), the mixed liquid collecting chamber (4), the main and auxiliary mixing chambers (5), the gas-liquid collecting chamber (6) and the gas-liquid mixing chamber (7) are located at the axial center of the main mixer (1), and the axial center line of the main water inlet channel (3), the axial center line of the mixed liquid collecting chamber (4), the axial center line of the main and auxiliary mixing chambers (5), the axial center line of the gas-liquid collecting chamber (6) and the axial center line of the gas-liquid mixing chamber (7) are on the same straight line as the axial center line of the main mixer (1).
3. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The secondary liquid inlet mixing channel (8) is located in the middle of the secondary mixer (2), and the axial center line of the secondary liquid inlet mixing channel (8) is on the same straight line as the axial center line of the secondary mixer (2).
4. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1 or 2, characterized in that The main water inlet channel (3) comprises a main water inlet (19) at the front, a tapered tube (20) at the middle, and a main water outlet (21) at the rear. The main water inlet (19) is connected to the tapered tube (20) at the middle and the main water outlet (21) at the rear in sequence. The main water inlet (19) is connected to a main water storage tank (22) via a pipeline. The diameter of one end of the tapered tube (20) at the middle is larger than that of the other end. The end with the larger diameter is connected to the main water inlet (19), and the other end with the smaller diameter is connected to the mixed liquid collection chamber (4) via the main water outlet (21) at the rear.
5. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1 or 3, characterized in that The auxiliary liquid inlet mixing channel (8) comprises an auxiliary water inlet (23) at the front, a front conical water inlet pipe (24) at the middle, a rear conical mixing pipe (25) and an auxiliary liquid outlet (26) at the rear. The auxiliary water inlet (23) at the front is sequentially connected to the front conical water inlet pipe (24) at the middle, the rear conical mixing pipe (25) and the auxiliary liquid outlet (26) at the rear. The auxiliary water inlet (23) is connected to the auxiliary water storage tank (27) via a pipeline. The front conical water inlet pipe (24) and the rear conical mixing pipe (25) both have one end with a larger diameter than the other end; the end with a larger diameter of the front conical water inlet pipe (24) is connected to the auxiliary water inlet port (23); the end with a smaller diameter of the front conical water inlet pipe (24) is connected to the end with a smaller diameter of the rear conical mixing pipe (25); and the end with a larger diameter of the rear conical mixing pipe (25) is connected to the auxiliary liquid inlet hole (13) via the rear auxiliary liquid outlet (26).
6. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The ejection channel I (12) is configured as an annular conical channel inclined inwardly.
7. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The ejection channel II (15) is configured as an annular channel, and an inwardly inclined oblique outlet (28) is configured at the junction of the ejection channel II (15) and the mixed liquid collection chamber (4).
8. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The ejection channel III (17) is configured as an annular conical channel inclined inwardly.
9. The gas-liquid mixer for compressed air foam fire extinguishing equipment according to claim 1, characterized in that The flow regulating pump (11) is an electric pump.