Dynamic gas-liquid mixer for compressed air foam fire extinguishing system

Abstract

A dynamic gas-liquid mixer for a compressed air foam fire extinguishing system comprises a main flow pipeline and an air inlet pipeline, an eccentric pipeline is arranged on the side wall of the main flow pipeline, and an auxiliary pipeline is arranged at the top of the main flow pipeline; an unpowered driving assembly is arranged in the eccentric pipeline, the unpowered driving assembly is close to the liquid inlet direction of the mixed liquid, the side wall of the unpowered driving assembly extends into the main flow pipeline, and the unpowered driving assembly rotates under the impact action of the mixed liquid; an injection pipe is installed between the air inlet pipeline and the auxiliary pipeline, and an air inlet is formed in the air inlet pipeline and communicated with the injection pipe. A speed reduction conversion assembly is arranged between the eccentric pipeline and the auxiliary pipeline and connected with the top of the unpowered driving assembly and the top of the injection pipe at the same time, and the unpowered driving assembly drives the injection pipe to rotate through the speed reduction conversion assembly. According to the fire extinguishing device, the injection pipe can rotate, so that compressed air and mixed liquid are fully mixed, the fire extinguishing efficiency is improved, extra power drive is not needed, and energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing equipment, in particular to a dynamic gas-liquid mixer for a compressed air foam fire extinguishing system. Background Technique

[0002] The compressed air foam fire extinguishing system is a new type of fire extinguishing technology. It generates homogeneous compressed air foam by mixing water, foam liquid and compressed air in a closed pipeline according to a set mixing ratio and gas-liquid ratio. In the existing compressed air foam fire extinguishing system, due to the relatively fast flow rate of the mixed liquid of water and foam agent in the main pipeline and the certain viscosity of the foam agent, the compressed air injection and the mixed liquid cannot be fully mixed, resulting in an unsatisfactory fire extinguishing effect and a low fire extinguishing efficiency. Content of the Utility Model

[0003] Based on this, the purpose of the utility model is to provide a dynamic gas-liquid mixer for a compressed air foam fire extinguishing system, which can make the compressed air and the mixed liquid fully mixed, thereby improving the fire extinguishing efficiency.

[0004] A dynamic gas-liquid mixer for a compressed air foam fire extinguishing system includes a main pipeline and an air inlet pipeline arranged at the bottom of the main pipeline. An eccentric pipeline communicating with the main pipeline is arranged on the side wall of the main pipeline, and an auxiliary pipeline corresponding to the position of the air inlet pipeline is arranged at the top.

[0005] A power-free driving component is arranged in the eccentric pipeline. The power-free driving component is close to the liquid inlet direction of the mixed liquid and the side wall extends into the main pipeline. Under the impact of the mixed liquid, the power-free driving component rotates.

[0006] A spray pipe is installed between the air inlet pipeline and the auxiliary pipeline. An air inlet is arranged on the air inlet pipeline, and the air inlet is communicated with the spray pipe.

[0007] A speed reduction and conversion component is arranged between the eccentric pipeline and the auxiliary pipeline. The speed reduction and conversion component is connected to the top of both the power-free driving component and the spray pipe at the same time. The power-free driving component drives the spray pipe to rotate through the speed reduction and conversion component.

[0008] Compared with the prior art, in the utility model, the spray pipe can rotate, making the compressed air and the mixed liquid fully mixed, thereby improving the fire extinguishing efficiency. At the same time, through the setting mode of the eccentric pipeline, the power-free driving component can rotate without additional power drive, which can save energy.

[0009] Further, the power-free driving component includes an impeller shaft installed in the eccentric pipeline and an impeller arranged on the impeller shaft.

[0010] The top of the impeller shaft is connected to the speed reduction and conversion assembly, and its axis is located outside the main pipeline. The end of the impeller extends into the main pipeline.

[0011] Furthermore, the speed reduction and conversion assembly includes a bottom plate installed on the tops of the eccentric pipeline and the auxiliary pipeline, a top plate connected to the bottom plate through support columns, and a speed reduction gear assembly disposed between the top plate and the bottom plate. The speed reduction gear assembly is simultaneously connected to the top of the impeller shaft and the injection pipe.

[0012] Furthermore, the speed reduction gear assembly includes a first pinion gear provided on the impeller shaft, a first large gear provided on the injection pipe, and a transition shaft disposed between the top plate and the bottom plate;

[0013] A transition large gear and a transition small gear are provided on the transition shaft. The transition large gear meshes with the first pinion gear, and the transition small gear meshes with the first large gear.

[0014] Furthermore, the speed reduction gear assembly includes a first pinion gear provided on the impeller shaft, and a first large gear provided on the injection pipe and meshing with the first pinion gear.

[0015] Furthermore, the injection pipe includes an air inlet section and an air outlet section that are connected and communicate with each other. The air inlet section is located in the air inlet pipeline, and the air outlet section is located in the main pipeline;

[0016] A plurality of air inlet holes are provided on the side wall of the air inlet section, and the air inlet holes communicate with the air inlet.

[0017] A plurality of rows of air outlet holes are provided on the side wall of the air outlet section.

[0018] Furthermore, the axis of the injection pipe is located on the center line of the main pipeline. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the dynamic gas-liquid mixer for the compressed air foam fire extinguishing system in the present invention;

[0020] Figure 2 is Figure 1 the sectional view of;

[0021] Figure 3 is Figure 1 the exploded view of in;

[0022] Description of the Main Component Symbols:

[0023] Main pipeline 10 Intake pipeline 11 Eccentric pipeline 12 Auxiliary pipeline 13 Powerless drive assembly 14 Impeller shaft 141 Impeller 142 Jet pipe 15 Intake section 151 Outlet section 152 Speed reduction conversion assembly 16 Bottom plate 161 Support column 162 Top plate 163 Reduction gear assembly 164 First pinion 1641 First large gear 1642 Transition shaft 1643 Transition large gear 1644 Transition pinion 1645

[0024] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiment

[0025] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0026] Please refer to Figures 1 to 3 , a dynamic gas-liquid mixer for a compressed air foam fire extinguishing system provided in an embodiment of the present utility model includes a main flow pipe 10 and an air inlet pipe 11 provided at the bottom of the main flow pipe 10. An eccentric pipe 12 communicating with the main flow pipe 10 is provided on the side wall of the main flow pipe 10, and an auxiliary pipe 13 corresponding to the position of the air inlet pipe 11 is provided at the top.

[0027] A power-free driving assembly 14 is provided in the eccentric pipe 12. The power-free driving assembly 14 is close to the liquid inlet direction of the mixed liquid and the side wall extends into the main flow pipe 10. Under the impact of the mixed liquid, the power-free driving assembly 14 rotates.

[0028] A spray pipe 15 is installed between the air inlet pipe 11 and the auxiliary pipe 13. An air inlet is provided on the air inlet pipe 11, and the air inlet is communicated with the spray pipe 15.

[0029] A speed reduction conversion assembly 16 is provided between the eccentric pipe 12 and the auxiliary pipe 13. The speed reduction conversion assembly 16 is connected to both the power-free driving assembly 14 and the top of the spray pipe 15 at the same time. The power-free driving assembly 14 drives the spray pipe 15 to rotate through the speed reduction conversion assembly 16.

[0030] It should be noted that in the present utility model, the mixed liquid after mixing water and foam agent enters from the main flow pipe 10. Under the action of water pressure, it will impact the power-free driving assembly 14, causing the power-free driving assembly 14 to rotate; the compressed air enters the main flow pipe 10 after passing through the air inlet and the spray pipe 15 in sequence; after the power-free driving assembly 14 is decelerated by the speed reduction conversion assembly 16, it drives the spray pipe 15 to rotate at a low speed, so that the compressed air can be continuously and fully mixed with the mixed liquid in all directions of 360°, thereby improving the fire extinguishing efficiency. In addition, in the present application, through the setting method of the eccentric pipe 12, the power-free driving assembly 14 can be rotated without additional power drive, which can save energy.

[0031] Please refer to Figure 2 and Figure 3 The non-powered drive assembly 14 includes an impeller shaft 141 installed in the eccentric pipe 12 and an impeller 142 provided on the impeller shaft 141;

[0032] The top of the impeller shaft 141 is connected to the speed reduction and conversion assembly 16, and its axis is located outside the main flow pipe 10. The end of the impeller 142 extends into the main flow pipe 10.

[0033] It should be noted that in this application, since the end of the impeller 142 will be impacted by the mixed liquid, it can rotate, thus realizing the function of no additional power drive. Due to the impact of the mixed liquid, the rotation speed of the impeller 142 is relatively high, so it is necessary to reduce the speed through the speed reduction and conversion assembly 16 to make the spray pipe 15 rotate at a low speed, so as to fully mix the compressed air and the mixed liquid.

[0034] Please refer to Figure 2 and Figure 3 The speed reduction and conversion assembly 16 includes a bottom plate 161 installed on the tops of the eccentric pipe 12 and the auxiliary pipe 13, a top plate 163 connected to the bottom plate 161 through a support column 162, and a speed reduction gear assembly 164 provided between the top plate 163 and the bottom plate 161. The speed reduction gear assembly 164 is connected to the top of the impeller shaft 141 and the spray pipe 15 at the same time.

[0035] Please refer to Figure 2 and Figure 3 In a preferred embodiment of this application, the speed reduction gear assembly 164 includes a first pinion 1641 provided on the impeller shaft 141, a first big gear 1642 provided on the spray pipe 15, and a transition shaft 1643 provided between the top plate 163 and the bottom plate 161;

[0036] A transition big gear 1644 and a transition small gear 1645 are provided on the transition shaft 1643. The transition big gear 1644 meshes with the first pinion 1641, and the transition small gear 1645 meshes with the first big gear 1642.

[0037] It should be noted that in this embodiment, two-stage speed reduction is adopted, which can reduce the size of the first big gear 1642, thereby reducing the overall size of the speed reduction gear assembly 164.

[0038] In another preferred embodiment of the present application, the reduction gear assembly 164 includes a first pinion gear disposed on the impeller shaft 141, and a first large gear disposed on the injection pipe 15 and meshing with the first pinion gear. In this embodiment, there is only one stage of speed reduction. Although the purpose of speed reduction can be achieved, the size of the first large gear is relatively large, which will make the overall size of the reduction gear assembly 164 relatively large.

[0039] Please refer to Figure 2 and Figure 3 , in a preferred embodiment of the present application, the injection pipe 15 includes an air inlet section 151 and an air outlet section 152 that are connected and communicate with each other. The air inlet section 151 is located in the air inlet pipe 11, and the air outlet section 152 is located in the main flow pipe 10;

[0040] A plurality of air inlet holes are provided on the side wall of the air inlet section 151, and the air inlet holes communicate with the air inlet;

[0041] A plurality of rows of air outlet holes are provided on the side wall of the air outlet section 152 to facilitate the uniform entry of compressed air into the main flow pipe 10.

[0042] In another preferred embodiment of the present application, the axis of the injection pipe 15 is located on the center line of the main flow pipe 10, so that the mixed liquid passes evenly from both sides of the injection pipe 15, facilitating the uniform mixing of the compressed air and the mixed liquid.

[0043] In summary, in the present utility model, the injection pipe 15 can rotate, enabling the compressed air and the mixed liquid to be fully mixed, thereby improving the fire extinguishing efficiency. At the same time, through the setting method of the eccentric pipe 12, the non-powered drive assembly 14 can be rotated without the need for additional power drive, which can save energy.

[0044] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. And the above-described embodiments only represent several implementation manners of the present utility model. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A dynamic gas-liquid mixer for a compressed air foam fire extinguishing system, comprising a main flow pipeline and an air inlet pipeline provided at the bottom of the main flow pipeline, characterized in that: An eccentric pipe communicating with the mainstream pipe is provided on the side wall of the mainstream pipe, and an auxiliary pipe corresponding to the position of the intake pipe is provided on the top; A power-free driving assembly is provided in the eccentric pipe. The power-free driving assembly is close to the liquid inlet direction of the mixed liquid and the side wall extends into the mainstream pipe. Under the impact of the mixed liquid, the power-free driving assembly rotates; A spray pipe is installed between the intake pipe and the auxiliary pipe. An air inlet is provided on the intake pipe, and the air inlet is communicated with the spray pipe; A speed reduction conversion assembly is provided between the eccentric pipe and the auxiliary pipe. The speed reduction conversion assembly is connected to the top of both the power-free driving assembly and the spray pipe at the same time. The power-free driving assembly drives the spray pipe to rotate through the speed reduction conversion assembly; 2. The dynamic gas-liquid mixer for a compressed air foam fire extinguishing system according to claim 1, wherein The power-free driving assembly includes an impeller shaft installed in the eccentric pipe and an impeller provided on the impeller shaft; The top of the impeller shaft is connected to the speed reduction conversion assembly, and the axis is located outside the mainstream pipe. The end of the impeller extends into the mainstream pipe; 3. The dynamic gas-liquid mixer for a compressed air foam fire extinguishing system according to claim 2, characterized in that, The speed reduction conversion assembly includes a bottom plate installed on the top of the eccentric pipe and the auxiliary pipe, a top plate connected to the bottom plate through support columns, and a speed reduction gear assembly provided between the top plate and the bottom plate. The speed reduction gear assembly is connected to the top of both the impeller shaft and the spray pipe at the same time; 4. The dynamic gas-liquid mixer for compressed air foam fire extinguishing system according to claim 3, characterized in that, The speed reduction gear assembly includes a first small gear provided on the impeller shaft, a first large gear provided on the spray pipe, and a transition shaft provided between the top plate and the bottom plate; A transition large gear and a transition small gear are provided on the transition shaft. The transition large gear meshes with the first small gear, and the transition small gear meshes with the first large gear; 5. The dynamic gas-liquid mixer for a compressed air foam fire extinguishing system according to claim 3, characterized in that, The speed reduction gear assembly includes a first small gear provided on the impeller shaft and a first large gear provided on the spray pipe and meshing with the first small gear; 6. The dynamic gas-liquid mixer for a compressed air foam fire extinguishing system according to claim 1, characterized in that, The spray pipe includes an air intake section and an air outlet section that are communicated with each other. The air intake section is located in the intake pipe, and the air outlet section is located in the mainstream pipe; A plurality of air intake holes are provided on the side wall of the air intake section, and the air intake holes are communicated with the air inlet; Multiple rows of air outlet holes are provided on the side wall of the air outlet section; 7. The dynamic gas-liquid mixer for a compressed air foam fire extinguishing system according to any one of claims 1 to 6, characterized in that The axis of the spray pipe is located on the center line of the mainstream pipe.

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