Pumping type mixing device and tunnel foam water spraying automatic fire extinguishing method

Abstract

The invention discloses a pumping type mixing device and a tunnel foam water spraying automatic fire extinguishing method, and relates to the field of mixing equipment. When water flows through the cylinder, the hydraulic wheel set is driven by the water pressure of inlet water to rotate, then the hydraulic wheel set drives the pumping mechanism to rotate and work through the transmission assembly, the pumping mechanism pumps foam liquid in the foam liquid storage tank into the mixing pipe, mixing of the foam liquid and water is achieved, and through cooperation of the hydraulic wheel set, the transmission assembly and the pumping mechanism, the foam liquid in the foam liquid storage tank is mixed with the water. The foam liquid can be automatically driven to be conveyed and mixed through water pressure when water enters the mixing device, the foam liquid is hydraulically conveyed through the pumping mechanism, the conveying pressure and the conveying flow of the foam liquid can be improved, and therefore the content of the foam liquid in foam water and the fire extinguishing effect of the foam water are improved; and when the water inlet pressure and flow of the water inlet pipe change, the conveying pressure and conveying flow of the pumping mechanism can be automatically adjusted, so that equal-proportion mixing of water flow and foam liquid is realized.

Description

Technical Field

[0001] The invention belongs to the field of mixing equipment, and in particular relates to a pump-in mixing device and a tunnel foam water spray automatic fire extinguishing method. Background Art

[0002] The mixing device is a common fire-fighting equipment, which is used to fully mix water and foam solution to form a liquid containing a large amount of foam.

[0003] Chinese patent CN115055069B discloses a mixing device for producing foam fire extinguishing agent, in which foam liquid is transported to the mixing tube through the height difference (liquid level difference) between the floating chamber and the mixing tube. However, due to the height limit of the outer shell, the height to which the floating chamber can rise is limited, so that the liquid level difference between the floating chamber and the mixing tube is small, so that the amount of foam liquid transported by the floating chamber to the mixing tube is less, thereby reducing the content of foam liquid in the foam water in the mixing tube and the fire extinguishing effect of the foam water. Summary of the invention

[0004] In view of the problems in the related art, the present invention proposes a pump-in mixing device and a tunnel foam water spray automatic fire extinguishing method to overcome the above-mentioned technical problems existing in the existing related art.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The water flowing through the cylinder is stirred to form a vortex, and at the same time, the hydraulic wheel group drives the pumping mechanism to rotate through the transmission component, so that the pumping mechanism pumps the foam liquid in the foam liquid storage tank into the liquid distribution mechanism; The liquid distribution mechanism includes a circumferential liquid distribution component and a sealing component. The circumferential liquid distribution component can evenly pump the foam liquid pumped by the pumping mechanism into the mixing tube along the circumferential direction of the mixing tube. The sealing component is used to seal the outlet of the circumferential liquid distribution component and can move to release the seal of the outlet of the circumferential liquid distribution component under the action of the water pressure of the water inlet pipe.

[0006] Furthermore, the hydraulic wheel set includes a bracket, the bracket is fixedly mounted on the end of the cylinder, a rotating shaft is rotatably mounted at the center position of the bracket, and a turbine is fixedly mounted on the rotating shaft.

[0007] Furthermore, the transmission assembly includes a transmission shaft and a driving bevel gear, the driving bevel gear is fixedly mounted on the rotating shaft, the transmission shaft is rotatably mounted on the side wall of the cylinder, the inner end of the transmission shaft is fixedly mounted with a driven bevel gear meshingly connected to the driving bevel gear, and the outer end of the transmission shaft is transmission-connected to the pumping mechanism.

[0008] Furthermore, the pumping mechanism includes an outer shell, a hydraulic pumping unit connected to the transmission assembly is installed inside the outer shell, a liquid inlet is provided at the top end of the outer shell, a liquid outlet is provided at the bottom end of the outer shell, the liquid inlet is connected to a liquid inlet pipe connected to a foam liquid storage tank, and the liquid outlet is connected to a liquid outlet pipe connected to a circumferential liquid distribution assembly.

[0009] Furthermore, the hydraulic pumping unit includes an active hydraulic gear and a driven hydraulic gear, both of which are rotatably mounted inside the outer shell, one end of the active hydraulic gear is transmission-connected to the transmission assembly, and the active hydraulic gear and the driven hydraulic gear are meshed and transmission-connected with each other.

[0010] Furthermore, the circumferential liquid distribution assembly includes a liquid distribution ring tube, which is fixedly installed on the outer ring of the mixing tube and connected to the pumping mechanism. The inner ring of the liquid distribution ring tube is provided with a plurality of circumferentially distributed liquid guide holes connected to the interior of the mixing tube.

[0011] Furthermore, the sealing assembly includes a sealing ring, which is slidably mounted on the inner wall of the mixing tube, and a plurality of circumferentially distributed limit connecting shafts are fixedly mounted on one end of the sealing ring away from the water inlet pipe, and a limit plate is slidably inserted on the limit connecting shaft, and the limit plate is fixedly mounted on the inner wall of the mixing tube. The limit connecting shaft is also provided with a return spring that abuts between the sealing ring and the limit plate.

[0012] Furthermore, a plurality of sealing plugs corresponding to the liquid guide holes are slidably mounted on the outer ring of the sealing ring, and a telescopic driving unit capable of driving the sealing plugs to telescope is also mounted on the sealing ring.

[0013] Further, the telescopic drive unit includes a hydraulic ring, a plurality of translation wedge blocks and a plurality of lifting wedge blocks, the plurality of translation wedge blocks and the plurality of lifting wedge blocks are all slidably mounted inside the sealing ring, and the lifting wedge blocks are fixedly mounted on the bottom ends of the corresponding sealing plugs, the top ends of the lifting wedge blocks are abutted with spring plates, and the translation wedge blocks are slidably supported on the bottom ends of the lifting wedge blocks; A connecting strip is fixedly installed at one end of the translation wedge block, and one end of the connecting strip slides and extends to the front side end of the sealing ring. The hydraulic ring is slidably installed on the inner wall of the mixing tube and is located at the front side end of the sealing ring. One side of the hydraulic ring is fixedly connected to the outer side end of the connecting strip, and a plurality of pressure springs are abutted and installed between the hydraulic ring and the sealing ring.

[0014] The present invention also discloses a tunnel foam water spray automatic fire extinguishing method, the specific steps are as follows: When a fire breaks out in a tunnel, fire fighting water is conveyed into the water inlet pipe through a water supply pipe communicated with the water inlet pipe, so that the fire fighting water is gradually conveyed backward through the cylinder body and the mixing pipe. When the fire fighting water flows through the cylinder body, the hydraulic wheel set rotates under the drive of the water inlet pressure, stirring the water flowing through the cylinder body to form a swirling flow. At the same time, the hydraulic wheel set drives the pumping mechanism to rotate and work through the transmission assembly, so that the pumping mechanism conveys the foam liquid in the foam liquid storage tank to the circumferential liquid distribution assembly of the liquid distribution mechanism. And at this time, the sealing assembly moves backward under the action of the water pressure in the mixing pipe to release the seal of the outlet of the circumferential liquid distribution assembly, so that the foam liquid can be evenly pumped into the mixing pipe along the circumferential direction of the mixing pipe through the circumferential liquid distribution assembly, and is mixed with the swirling water flow in the mixing pipe. Finally, the foam water mixed with the foam liquid is sprayed outwards through a fire hydrant communicated with the mixing pipe to extinguish the fire in the tunnel.

[0015] The present invention has the following beneficial effects: 1. In the present invention, when the fire fighting water flows through the cylinder body, the hydraulic wheel set rotates under the drive of the water inlet pressure. Then, the hydraulic wheel set drives the pumping mechanism to rotate and work through the transmission assembly, so that the pumping mechanism pumps the foam liquid in the foam liquid storage tank into the mixing pipe, realizing the mixing of the foam liquid and water to form foam water. Through the cooperation of the hydraulic wheel set, the transmission assembly and the pumping mechanism, the foam liquid can be automatically driven for conveying and mixing by the water pressure when the mixing device intakes water, and the hydraulic conveying of the foam liquid is carried out through the pumping mechanism, which can improve the conveying pressure and conveying flow rate of the foam liquid, thereby increasing the content of the foam liquid in the foam water and the fire extinguishing effect of the foam water. And when the water inlet pressure and flow rate of the water inlet pipe change, the rotation speed of the hydraulic wheel set can change accordingly, so as to automatically adjust the conveying pressure and conveying flow rate of the pumping mechanism, and can realize the proportional mixing of the fire fighting water and the foam liquid to further improve the fire extinguishing effect of the mixed foam water.

[0016] 2. In the present invention, when the hydraulic wheel set rotates to drive the pumping mechanism to work, it can also stir the water flowing through the cylinder body to form a swirling state. When the swirling water flow passes through the mixing pipe, it can be fully rotated and mixed with the foam liquid conveyed into the mixing pipe, so as to improve the mixing effect of the water flow and the foam liquid, and further improve the fire extinguishing effect of the mixed foam water.

[0017] 3. In the present invention, the pumping mechanism first pumps the foam liquid into the circumferential liquid distribution assembly, so that the foam liquid can be evenly pumped into the mixing pipe along the circumferential direction of the mixing pipe through the circumferential liquid distribution assembly, so as to further improve the mixing effect of the water flow and the foam liquid and the fire extinguishing effect of the mixed foam water; and the outlet of the circumferential liquid distribution assembly is sealed by the sealing assembly when the foam water is not mixed, so as to prevent the foam liquid in the foam liquid storage tank from leaking from the outlet of the circumferential liquid distribution assembly. When the foam water is mixed, the sealing assembly can move backward under the action of the water pressure in the mixing pipe to release the seal of the outlet of the circumferential liquid distribution assembly, realizing the automatic conveying and mixing of the foam liquid.

[0018] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 One of the three-dimensional structural schematic diagrams of the pumping-in type mixing device of the present invention; Figure 2 For the present invention Figure 1 Partial enlarged structural schematic diagram at position A; Figure 3 Another three-dimensional structural schematic diagram of the pumping-in type mixing device of the present invention; Figure 4 For the present invention Figure 3 Partial enlarged structural schematic diagram at position B; Figure 5 Another three-dimensional structural schematic diagram of the pumping-in type mixing device of the present invention; Figure 6 For the present invention Figure 5 Partial enlarged structural schematic diagram at position C; Figure 7 Another three-dimensional structural schematic diagram of the pumping-in type mixing device of the present invention; Figure 8 For the present invention Figure 7 Partial enlarged structural schematic diagram at position D.

[0021] In the figure: 1. Foam liquid storage tank; 2. Water inlet pipe; 3. Mixing pipe; 4. Hydraulic driving mechanism; 41. Cylinder body; 42. Transmission shaft; 43. Turbine; 44. Rotating shaft; 45. Bracket; 46. Driving bevel gear; 47. Driven bevel gear; 5. Pumping mechanism; 51. Outer housing; 52. Liquid inlet pipe; 53. Liquid outlet pipe; 54. Liquid inlet; 55. Driving hydraulic gear; 56. Liquid outlet; 57. Driven hydraulic gear; 6. Liquid distribution mechanism; 61. Liquid distribution ring pipe; 62. Liquid guiding hole; 63. Sealing ring; 64. Sealing plug; 65. Return spring; 66. Limiting plate; 67. Limiting connecting shaft; 68. Hydraulic ring; 69. Pressure spring; 610. Connecting strip; 611. Translating wedge block; 612. Lifting wedge block; 613. Elastic sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0023] In the description of the present invention, it is necessary to understand that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention.

[0024] Embodiment 1

[0025] See also Figures 1-4 As shown, the present invention is a pump-in mixing device, comprising a foam liquid storage tank 1, a water inlet pipe 2 and a mixing pipe 3, a hydraulic driving mechanism 4 is arranged between the water inlet pipe 2 and the mixing pipe 3, a pumping mechanism 5 is connected and installed at the outlet end of the foam liquid storage tank 1, and a liquid distribution mechanism 6 connected to the mixing pipe 3 is installed at the end of the pumping mechanism 5; the hydraulic driving mechanism 4 comprises a cylinder 41, a hydraulic wheel group and a transmission assembly, the cylinder 41 is connected and installed between the water inlet pipe 2 and the mixing pipe 3, the hydraulic wheel group is rotatably installed inside the cylinder 41, and is transmission-connected to the pumping mechanism 5 through the transmission assembly, and the hydraulic wheel group can be in the water inlet pipe 2 is driven to rotate under the water pressure of the water inlet pipe 2 to stir the water flow in the cylinder 41 to form a vortex, and at the same time, the hydraulic wheel group drives the pumping mechanism 5 to rotate through the transmission component to make the pumping mechanism 5 pump the foam liquid in the foam liquid storage tank 1 into the liquid distribution mechanism 6; the liquid distribution mechanism 6 includes a circumferential liquid distribution component and a sealing component. The circumferential liquid distribution component can uniformly pump the foam liquid pumped by the pumping mechanism 5 into the mixing tube 3 along the circumferential direction of the mixing tube 3. The sealing component is used to seal the outlet of the circumferential liquid distribution component and can move to release the seal of the outlet of the circumferential liquid distribution component under the water pressure of the water inlet pipe 2; When it is necessary to mix water and foam liquid to form foam water, water is fed into the water inlet pipe 2 through a water supply pipe connected to the water inlet pipe 2, so that the water flows through the water inlet pipe 2, the cylinder 41, and the mixing tube 3 and is gradually transported backwards. When the water flows through the cylinder 41, the hydraulic wheel group in the cylinder 41 rotates under the driving of the water pressure of the inlet water, and stirs the water flowing through the cylinder 41 to form a vortex, so as to transport the water to the mixing tube 3 in a vortex state. At the same time, the hydraulic wheel group drives the pumping mechanism 5 to rotate through the transmission assembly, so that the pumping mechanism 5 transports the foam liquid in the foam liquid storage tank 1 to the circumferential liquid distribution component of the liquid distribution mechanism 6, and at this time, the sealing assembly moves backward under the action of the water pressure in the mixing tube 3 to release the seal on the outlet of the circumferential liquid distribution component, so that the foam liquid can be evenly pumped into the mixing tube 3 along the circumferential direction of the mixing tube 3 through the circumferential liquid distribution component, and mixed with the vortex-shaped water flow in the mixing tube 3 to form foam water; Among them, the hydraulic delivery of the foam liquid through the pumping mechanism 5 can increase the delivery pressure and delivery flow of the foam liquid, thereby increasing the content of the foam liquid in the foam water and the fire extinguishing effect of the foam water, and when the water pressure and flow of the water inlet pipe 2 change, the rotation speed of the hydraulic wheel group can change accordingly, thereby automatically adjusting the delivery pressure and delivery flow of the pumping mechanism 5, and achieving equal proportion mixing of water and foam liquid, so as to further improve the fire extinguishing effect of the mixed foam water; when the hydraulic wheel group rotates to drive the pumping mechanism 5 to work, it can also flow through the cylinder 4 The water flow of 1 is stirred to form a swirl state, and at the same time, the foam liquid can be uniformly pumped into the mixing tube 3 along the circumferential direction of the mixing tube 3 through the circumferential liquid distribution component to improve the mixing effect of the water flow and the foam liquid, and when the foam water is not mixed, the outlet of the circumferential liquid distribution component is sealed by the sealing component to prevent the foam liquid in the foam liquid storage tank 1 from leaking from the outlet of the circumferential liquid distribution component, and when the foam water is mixed, the sealing component can move backward under the action of the water pressure in the mixing tube 3 to release the seal on the outlet of the circumferential liquid distribution component, so as to realize automatic conveying and mixing of the foam liquid.

[0026] Embodiment 2

[0027] See also Figure 3 , Figure 4 As shown, the difference between this embodiment and the above embodiment is that the hydraulic wheel group includes a bracket 45, the bracket 45 is fixedly mounted on the end of the cylinder 41, the central position of the bracket 45 is rotatably mounted with a rotating shaft 44, and the rotating shaft 44 is fixedly mounted with a turbine 43; the transmission assembly includes a transmission shaft 42 and an active bevel gear 46, the active bevel gear 46 is fixedly mounted on the rotating shaft 44, the transmission shaft 42 is rotatably mounted on the side wall of the cylinder 41, the inner end of the transmission shaft 42 is fixedly mounted with a driven bevel gear 47 meshing and transmission-connected with the active bevel gear 46, and the outer end of the transmission shaft 42 is transmission-connected with the pumping mechanism 5; When water flows through the cylinder body 41, the turbine 43 starts to rotate under the hydraulic drive of the water flow, and stirs the water flow passing through the cylinder body 41 to form a swirling state. When the turbine 43 rotates, it drives the rotating shaft 44 and the driving bevel gear 46 to rotate synchronously. The driving bevel gear 46 then meshes with and drives the driven bevel gear 47 to rotate. When the driven bevel gear 47 rotates, it drives the transmission shaft 42 to rotate synchronously, so that the transmission shaft 42 drives the pumping mechanism 5 to work.

[0028] Embodiment III

[0029] Please refer to Figures 1-4 As shown, the difference between this embodiment and the above embodiment is that the pumping mechanism 5 includes a housing 51. Inside the housing 51, a hydraulic pumping unit is installed and is in transmission connection with the transmission component. At the top of the housing 51, a liquid inlet 54 is provided. At the bottom of the housing 51, a liquid outlet 56 is provided. A liquid inlet pipe 52 connected to and communicating with the foam liquid storage tank 1 is installed on the liquid inlet 54. A liquid outlet pipe 53 connected to and communicating with the circumferential liquid distribution component is installed on the liquid outlet 56. The hydraulic pumping unit includes a driving hydraulic gear 55 and a driven hydraulic gear 57. Both the driving hydraulic gear 55 and the driven hydraulic gear 57 are rotatably installed inside the housing 51. One end of the driving hydraulic gear 55 is in transmission connection with the transmission component, and the driving hydraulic gear 55 and the driven hydraulic gear 57 are meshed and in transmission connection with each other. Among them, the driving hydraulic gear 55 is in transmission connection with the transmission shaft 42. When the transmission shaft 42 rotates, it can drive the driving hydraulic gear 55 to rotate. At the same time, the driving hydraulic gear 55 meshes with and drives the driven hydraulic gear 57 to rotate. At this time, the ends of the driving hydraulic gear 55 and the driven hydraulic gear 57 close to the liquid inlet 54 rotate and separate to form a negative pressure suction force, so as to suck the foam liquid in the foam liquid storage tank 1 into the housing 51 through the liquid inlet 54 and the liquid inlet pipe 52. And the ends of the driving hydraulic gear 55 and the driven hydraulic gear 57 close to the liquid outlet 56 rotate and close to form a positive pressure, and pump the foam liquid in the housing 51 from the liquid outlet 56 into the liquid outlet pipe 53. Thus, through the continuous rotation of the driving hydraulic gear 55 and the driven hydraulic gear 57, the foam liquid can be continuously sucked in and pumped out to conduct the transportation of the foam liquid.

[0030] Embodiment IV

[0031] Please refer to Figures 3-8As shown, the difference between this embodiment and the above embodiment is that the circumferential liquid distribution component includes a liquid distribution ring tube 61, which is fixedly installed on the outer ring of the mixing tube 3 and communicated with the pumping mechanism 5, and the inner inner ring of the liquid distribution ring tube 61 is provided with a plurality of circumferentially distributed liquid guide holes 62 that are communicated with the inside of the mixing tube 3; the sealing component includes a sealing ring 63, which is slidably installed on the inner wall of the mixing tube 3, and a plurality of circumferentially distributed limiting connecting shafts 67 are fixedly installed on one end of the sealing ring 63 away from the water inlet pipe 2, and a limiting plate 66 is slidably inserted on the limiting connecting shaft 67, and the limiting plate 66 is fixedly installed on the inner wall of the mixing tube 3, and a return spring 65 abutting between the sealing ring 63 and the limiting plate 66 is also sleeved on the limiting connecting shaft 67; Among them, the sealing ring 63 is initially located at the inner circle of the liquid guide hole 62 to seal the liquid guide hole 62. When the water flows through the mixing tube 3, the sealing ring 63 slides backward along the inner wall of the mixing tube 3 under the hydraulic thrust of the water flow, so that the sealing ring 63 and the liquid guide hole 62 are staggered, and at the same time, the foam liquid in the liquid outlet pipe 53 is transported to the liquid distribution ring tube 61, and then is uniformly transported to the mixing tube 3 in a circular shape through the multiple liquid guide holes 62 on the inner circle of the liquid distribution ring tube 61, so as to improve the mixing effect of the water flow and the foam liquid in the mixing tube 3; and when the mixing process is completed and the water inlet pipe 2 stops inletting water, the sealing ring 63 is no longer subjected to the hydraulic thrust of the water flow. At this time, the sealing ring 63 moves and resets along the inner wall of the mixing tube 3 in the direction of the liquid guide hole 62 under the action of the reset elastic force of the reset spring 65 until the sealing ring 63 moves to the inner side of the liquid guide hole 62, and the liquid guide hole 62 is abutted and sealed again to prevent the foam liquid in the foam liquid storage tank 1 from leaking out from the liquid guide hole 62.

[0032] Furthermore, a plurality of sealing plugs 64 corresponding to the liquid guide holes 62 are slidably mounted on the outer ring of the sealing ring 63, and a telescopic drive unit capable of driving the sealing plugs 64 to telescope is also mounted on the sealing ring 63; the telescopic drive unit comprises a hydraulic ring 68, a plurality of translation wedge blocks 611 and a plurality of lifting wedge blocks 612, the plurality of translation wedge blocks 611 and the plurality of lifting wedge blocks 612 are all slidably mounted inside the sealing ring 63, and the lifting wedge blocks 612 are fixedly mounted on the bottom ends of the corresponding sealing plugs 64, and the lifting wedge blocks 61 2 is abutted with a spring piece 613, and a translation wedge block 611 is slidably supported on the bottom end of the lifting wedge block 612; a connecting strip 610 is fixedly installed on one end of the translation wedge block 611, and one end of the connecting strip 610 slides and extends to the front side end of the sealing ring 63, and a hydraulic ring 68 is slidably installed on the inner wall of the mixing tube 3 and is located at the front side end of the sealing ring 63, one side of the hydraulic ring 68 is fixedly connected to the outer side end of the connecting strip 610, and a plurality of pressure springs 69 are abutted and installed between the hydraulic ring 68 and the sealing ring 63; When the sealing ring 63 is located at the inner circle of the liquid guide hole 62, the sealing plug 64 at the outer circle of the sealing ring 63 is sealed and clamped in the corresponding liquid guide hole 62, so that the sealing performance of the liquid guide hole 62 can be improved through the clamping and sealing of the sealing plug 64 to prevent the foam liquid from leaking, and the sealing ring 63 can be limited by the clamping of the sealing plug 64 and the liquid guide hole 62, so that the sealing ring 63 is just located at the inner circle of the liquid guide hole 62, preventing the sealing ring 63 from being excessively displaced and staggered with the liquid guide hole 62 under the reset elastic force of the reset spring 65; and when the water flows through the mixing tube 3, the hydraulic ring 68 is pushed toward the sealing ring 6 by the hydraulic thrust of the water flow. 3, while the sealing ring 63 is kept stationary by the clamping limit of the sealing plug 64 and the liquid guide hole 62. At this time, the hydraulic ring 68 pushes the translation wedge block 611 backward through the connecting strip 610, so that the translation wedge block 611 and the lifting wedge block 612 are gradually staggered. Then, the lifting wedge block 612 moves downward under the elastic force of the spring piece 613, and drives the sealing plug 64 downward, so that the sealing plug 64 is separated from the liquid guide hole 62. Then, the hydraulic ring 68 and the sealing ring 63 are synchronously moved backward under the push of the water flow and staggered with the liquid guide hole 62, so that the liquid guide hole 62 is opened, and the foam liquid enters the mixing tube 3 through the liquid guide hole 62 and mixes with the water flow. When the mixing process is completed and the water inlet pipe 2 stops inletting water, the sealing ring 63 moves and resets in the direction of the liquid guide hole 62, and the sealing ring 63 drives the sealing plug 64 and the hydraulic ring 68 to reset synchronously. At this time, the sealing plug 64 abuts against the inner wall of the mixing tube 3 until the sealing plug 64 moves to the position of the liquid guide hole 62. The hydraulic ring 68 moves and resets in the direction away from the sealing ring 63 under the action of the reset elastic force of the pressure spring 69. At the same time, the hydraulic ring 68 pulls the translation wedge block 611 to translate and reset through the connecting strip 610, so that the translation wedge block 611 pushes the lifting wedge block 612 upward and resets it through the inclined surface, so that the lifting wedge block 612 drives the sealing plug 64 to move upward and be inserted into the liquid guide hole 62, thereby sealing the liquid guide hole 62 again.

[0033] Embodiment 5

[0034] This embodiment discloses a tunnel foam water spray automatic fire extinguishing method, the specific steps are as follows: When a fire breaks out in the tunnel, fire-fighting water is conveyed into the water inlet pipe 2 through the water supply pipe communicated with the water inlet pipe 2, so that the fire-fighting water is gradually conveyed backward through the cylinder body 41 and the mixing pipe 3. When the fire-fighting water flows through the cylinder body 41, the hydraulic wheel set rotates under the drive of the water inlet pressure, stirring the water flowing through the cylinder body 41 to form a swirling flow. At the same time, the hydraulic wheel set drives the pumping mechanism 5 to rotate and work through the transmission assembly, so that the pumping mechanism 5 conveys the foam liquid in the foam liquid storage tank 1 to the circumferential liquid distribution assembly of the liquid distribution mechanism 6. And at this time, the sealing assembly moves backward under the action of the water pressure in the mixing pipe 3 to release the seal of the outlet of the circumferential liquid distribution assembly, so that the foam liquid can be evenly pumped into the mixing pipe 3 along the circumferential direction of the mixing pipe 3 through the circumferential liquid distribution assembly, and is mixed with the swirling water flow in the mixing pipe 3. Finally, the foam water mixed with the foam liquid is sprayed outwards through the fire hydrant communicated with the mixing pipe 3 to extinguish the fire in the tunnel.

[0035] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the invention disclosed above are only used to help explain the invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. The embodiments selected and specifically described in this specification are to better explain the principle and practical application of the invention, so that those skilled in the art can understand and utilize the invention well.

Claims

1. A pump-in mixing device, comprising a foam liquid storage tank, a water inlet pipe and a mixing pipe, characterized in that: A hydraulic driving mechanism is provided between the water inlet pipe and the mixing pipe, a pumping mechanism is connected to the outlet end of the foam liquid storage tank, and a liquid distribution mechanism connected to the mixing pipe is installed at the end of the pumping mechanism; The hydraulic drive mechanism comprises a cylinder, a hydraulic wheel group and a transmission assembly. The cylinder is connected and installed between the water inlet pipe and the mixing pipe. The hydraulic wheel group is rotatably installed inside the cylinder and is transmission-connected to the pumping mechanism through the transmission assembly. The hydraulic wheel group can rotate under the driving of the water pressure of the water inlet pipe to stir the water flowing through the cylinder to form a vortex. At the same time, the hydraulic wheel group drives the pumping mechanism to rotate through the transmission assembly, so that the pumping mechanism pumps the foam liquid in the foam liquid storage tank into the liquid distribution mechanism. The liquid distribution mechanism includes a circumferential liquid distribution component and a sealing component. The circumferential liquid distribution component can evenly pump the foam liquid pumped by the pumping mechanism into the mixing tube along the circumferential direction of the mixing tube. The sealing component is used to seal the outlet of the circumferential liquid distribution component and can move to release the seal of the outlet of the circumferential liquid distribution component under the action of the water pressure of the water inlet pipe.

2. A pump-in mixing device according to claim 1, characterized in that: The hydraulic wheel set comprises a bracket, the bracket is fixedly mounted on the end of the cylinder, a rotating shaft is rotatably mounted at the center of the bracket, and a turbine is fixedly mounted on the rotating shaft.

3. A pump-in mixing device according to claim 2, characterized in that: The transmission assembly includes a transmission shaft and a driving bevel gear, wherein the driving bevel gear is fixedly mounted on the rotating shaft, and the transmission shaft is rotatably mounted on the side wall of the cylinder. A driven bevel gear meshingly connected to the driving bevel gear is fixedly mounted on the inner end of the transmission shaft, and the outer end of the transmission shaft is drivingly connected to the pumping mechanism.

4. A pump-in mixing device according to claim 1, characterized in that: The pumping mechanism includes an outer shell, a hydraulic pumping unit connected to the transmission assembly is installed inside the outer shell, a liquid inlet is provided at the top end of the outer shell, a liquid outlet is provided at the bottom end of the outer shell, the liquid inlet is connected to a liquid inlet pipe connected to a foam liquid storage tank, and the liquid outlet is connected to a liquid outlet pipe connected to a circumferential liquid distribution assembly.

5. A pump-in mixing device according to claim 4, characterized in that: The hydraulic pumping unit includes an active hydraulic gear and a driven hydraulic gear, both of which are rotatably mounted inside an outer shell, one end of the active hydraulic gear is transmission-connected to a transmission assembly, and the active hydraulic gear and the driven hydraulic gear are meshed and transmission-connected with each other.

6. A pump-in mixing device according to claim 1, characterized in that: The circumferential liquid distribution component includes a liquid distribution ring tube, which is fixedly installed on the outer ring of the mixing tube and connected to the pumping mechanism. The inner ring of the liquid distribution ring tube is provided with a plurality of circumferentially distributed liquid guide holes connected to the interior of the mixing tube.

7. A pump-in mixing device according to claim 6, characterized in that: The sealing assembly includes a sealing ring, which is slidably mounted on the inner wall of the mixing tube. A plurality of circumferentially distributed limit connecting shafts are fixedly mounted on one end of the sealing ring away from the water inlet pipe. A limit plate is slidably inserted on the limit connecting shaft, and the limit plate is fixedly mounted on the inner wall of the mixing tube. A return spring is also mounted on the limit connecting shaft to abut between the sealing ring and the limit plate.

8. A pump-in mixing device according to claim 7, characterized in that: The outer ring of the sealing ring is slidably mounted with a plurality of sealing plugs corresponding to the liquid guide holes one by one, and the sealing ring is also mounted with a telescopic driving unit capable of driving the sealing plugs to telescope.

9. A pump-in mixing device according to claim 8, characterized in that: The telescopic drive unit includes a hydraulic ring, a plurality of translation wedge blocks and a plurality of lifting wedge blocks, the plurality of translation wedge blocks and the plurality of lifting wedge blocks are slidably mounted inside the sealing ring, and the lifting wedge blocks are fixedly mounted on the bottom ends of the corresponding sealing plugs, the top ends of the lifting wedge blocks are abutted with spring plates, and the translation wedge blocks are slidably supported on the bottom ends of the lifting wedge blocks; A connecting strip is fixedly installed at one end of the translation wedge block, and one end of the connecting strip slides and extends to the front side end of the sealing ring. The hydraulic ring is slidably installed on the inner wall of the mixing tube and is located at the front side end of the sealing ring. One side of the hydraulic ring is fixedly connected to the outer side end of the connecting strip, and a plurality of pressure springs are abutted and installed between the hydraulic ring and the sealing ring.

10. A tunnel foam water spray automatic fire extinguishing method, using a pump-in mixing device according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: When a fire occurs in the tunnel, fire-fighting water is transported into the water inlet pipe through a water supply pipe connected to the water inlet pipe, so that the fire-fighting water is gradually transported backwards through the cylinder and the mixing tube. When the fire-fighting water flows through the cylinder, the hydraulic wheel group rotates under the drive of the inlet water pressure, and stirs the water flowing through the cylinder to form a vortex. At the same time, the hydraulic wheel group drives the pumping mechanism to rotate through the transmission assembly, so that the pumping mechanism transports the foam liquid in the foam liquid storage tank to the circumferential liquid distribution assembly of the liquid distribution mechanism. At this time, the sealing assembly moves backward under the action of the water pressure in the mixing tube to release the seal on the outlet of the circumferential liquid distribution assembly, so that the foam liquid can be evenly pumped into the mixing tube through the circumferential liquid distribution assembly along the circumferential direction of the mixing tube, and mixed with the vortex-like water flow in the mixing tube. Finally, the foam water mixed with the foam liquid is sprayed out through the fire hydrant connected to the mixing tube to extinguish the fire in the tunnel.

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