Rotary cyclone homogenizing device for solid explosion suppressant

Abstract

The utility model discloses a rotary cyclone homogenizing device for a solid explosion suppressant, and belongs to the technical field of explosion safety protection. In the device, an inert gas high-pressure cabin wraps a tangential gas inlet cabin and a main explosion suppression cabin; tangential air inlets are distributed in the portion, wrapped by the tangential air inlet cabin, of the inert gas cabin wall. The inner wall of the main explosion suppression cabin is provided with a tangential air outlet and a rotary air guide groove, the bottom of the main explosion suppression cabin is filled with solid explosion suppressant powder, and the top is provided with a dynamic screen. After an explosion is detected, an electromagnetic valve at a tangential air inlet is firstly opened, so that a cyclone is formed in the main explosion suppressant cabin, and the solid explosion suppressant forms a uniform gas-solid two-phase cloud; then an electromagnetic valve at the bottom is opened, high-pressure gas enters from the bottom of the main explosion suppressant cabin, huge axial thrust is formed, and gas-solid two-phase cloud is sprayed out from an outlet; and meanwhile, the dynamic screen vibrates at high frequency under the action of high-speed airflow, so that residual solid particles are further homogenized. The device can quickly and uniformly release the explosion suppressant, is wide in coverage range, is not easy to block, and is suitable for protection of various flammable and explosive places.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the explosion safety protection technical field, concretely relates to a device and method for realizing solid explosion inhibitor uniform high-speed release through premixing rotational flow field. BACKGROUND

[0002] In the active explosion suppression technology, the release performance of the explosion inhibitor is one of the core factors determining the explosion suppression effect. The ideal release requires that the explosion inhibitor can cover the entire dangerous area instantaneously with extremely high speed and uniform concentration distribution. At present, the mainstream technology adopts a high-pressure gas driving mode, and its typical structure includes a main cabin for storing the explosion inhibitor and a gas source for storing high-pressure driving gas, which are separated by a bursting disc or a quick-opening valve. When triggered, the valve is opened, and the high-pressure gas rushes into the explosion inhibitor cabin to push it out. The existing such device has defects in release uniformity. The high-pressure gas is usually injected from one end of the explosion inhibitor cabin in one direction, which causes the explosion inhibitor at the front end to be accelerated and pushed out first, while the explosion inhibitor at the rear end undergoes a slower acceleration process, resulting in a phenomenon that the concentration of the explosion inhibitor is higher at the front end and lower at the rear end during the release process, and there is a delay in time, which cannot form an instant and uniform coverage cloud. SUMMARY

[0003] To solve the problems in the prior art, the utility model provides a solid explosion inhibitor rotational cyclone uniformization device. Under the premise of ensuring the triggering speed, the solid explosion inhibitor powder is first mixed uniformly with the driving gas, and at the same time, the outlet is designed to be tapered, so that the coverage range of the ejected gas is increased, thereby achieving better explosion suppression effect.

[0004] The utility model discloses a solid explosion inhibitor rotational cyclone uniformization device, including inert gas high pressure cabin and main explosion inhibitor cabin, inert gas high pressure cabin is sleeved in the outer periphery of main explosion inhibitor cabin, still setting tangential inlet port cabin on the outer wall of main explosion inhibitor cabin;

[0005] The bottom of the main explosion inhibitor cabin is provided with solid explosion inhibitor, and the top is provided with a dynamic screen. A tapered outlet and a pressure limiting valve are arranged at the outlet of the main explosion inhibitor cabin. An electromagnetic valve one is arranged on the wall of the tangential inlet port cabin. A tangential inlet port is arranged on the wall of the main explosion inhibitor cabin corresponding to the side of the electromagnetic valve one. The tangential inlet port is connected to a tangential outlet port arranged on the wall of the main explosion inhibitor cabin on the opposite side through a gas guide channel.

[0006] The communication between the inert gas high pressure cabin and the main explosion inhibitor cabin is controlled by an electromagnetic valve two, and the communication between the inert gas high pressure cabin and the tangential inlet port cabin is controlled by an electromagnetic valve one.

[0007] In the dynamic screen, the dynamic screen screen is connected to the inner wall of the main explosion inhibitor cabin by connecting springs, and irregular guide vanes are arranged on the outer periphery of the dynamic screen screen.

[0008] Furthermore, the tangential air inlet and tangential air outlet are located on the active explosion suppressant bulkhead between the bottom of the tangential air inlet bulkhead and the dynamic screen.

[0009] Furthermore, a guide groove is provided at the tangential air outlet, the tangential air inlet is located on the outer wall of the main detonator compartment, and the tangential air outlet is located on the inner wall of the active detonator compartment.

[0010] Furthermore, the second solenoid valve responds 5-15ms after the first solenoid valve responds.

[0011] The beneficial effects of this invention are as follows: The device controls the opening time of two solenoid valves, allowing the explosion suppressant powder and inert gas to first form a uniformly concentrated gas-solid two-phase suspension cloud. Then, axial thrust is applied to this suspension cloud to propel it outwards. The dynamic screen vibrates at high frequency under the impact of the airflow, further breaking up any remaining particle clumps in the explosion suppressant, making the gas-solid two-phase suspension cloud more uniform. The pressure relief valve opens after a sudden pressure increase, allowing the uniform explosion suppressant to rush out from the converging orifice, giving the ejected explosion suppressant cloud a larger diffusion angle, thus achieving rapid and uniform release of the explosion suppressant. Therefore, this device can achieve rapid and uniform release of solid explosion suppressants, and the ejected explosion suppressant cloud has a larger coverage area.

[0012] This device achieves rapid and uniform release of the detonator through the synergistic effect of tangential air intake to form an air cyclone, axial thrust injection, and dynamic screen vibration. It not only has a wide coverage area but also effectively prevents blockage, making it suitable for protection in various flammable and explosive environments. Attached Figure Description

[0013] Figure 1 This is a front structural sectional view of the present invention.

[0014] Figure 2 It is a cross-sectional view of the tangential air intake bulkhead.

[0015] Figure 3 This is a top view of the dynamic screen in this utility model.

[0016] Figure 4 This is a diagram analyzing the tapered outlet parameters in this utility model.

[0017] In the diagram: 1. Inert gas high-pressure chamber wall; 2. Converging outlet; 3. Pressure relief valve; 4. Solenoid valve one; 5. Tangential inlet chamber wall; 6. Main anti-explosive chamber wall; 7. Solenoid valve two; 8. Tangential inlet; 9. Tangential outlet; 10. Air guide channel; 11. Solid anti-explosive powder; 12. Dynamic screen; 13. Main anti-explosive chamber; 14. Inert gas high-pressure chamber; 15. Tangential inlet chamber; 16. Dynamic screen mesh; 17. Main anti-explosive chamber inner wall; 18. Connecting spring; 19. Irregular guide vane. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] like Figures 1 to 4 As shown, a solid explosion suppressant rotating cyclone homogenization device includes an inert gas high-pressure chamber 14, a tangential air inlet chamber 15, and a main explosion suppressant chamber 13. Solid explosion suppressant powder 11 is located at the bottom of the main explosion suppressant chamber 13. A dynamic screen 12 is provided above the main explosion suppressant chamber 13, and the top is a tapered outlet 2 with a pressure limiting valve 3. The inert gas high-pressure chamber wall 1 is fixedly connected to the main explosion suppressant chamber 13 and the tapered outlet 2 at the connection point. A solenoid valve 4 for controlling the radial airflow along the main explosion suppressant chamber 13 is installed on the tangential air inlet chamber wall 5. A solenoid valve 7 for controlling the axial airflow along the main explosion suppressant chamber 13 is provided at the bottom of the main explosion suppressant chamber wall 6. A tangential air inlet 8 is provided on the outer wall of one side of the main explosion suppressant chamber wall 6, which extends inward to the main explosion suppressant chamber 13. The air inlet 8 is guided along the air guide channel to the tangential air outlet 9 on the other side wall. The inner wall of the tangential air outlet 9 is covered with air guide grooves 10 to assist in generating a rotating flow field. Solenoid valve 2 7 responds 5-15ms after solenoid valve 4. The connection between dynamic screen 12 and main detonator compartment 13 is achieved by connecting spring 18, and irregular guide vanes 19 are installed around dynamic screen 12.

[0020] The device proposed in this invention for achieving uniform and high-speed release of solid explosion suppressant through a premixed swirling flow field includes an inert gas high-pressure chamber 14, a tangential air inlet chamber 15, a main explosion suppressant chamber 13, and a tapered outlet 2.

[0021] Tangential air inlet 8 and tangential air outlet 9 are located on the main anti-explosive bulkhead 6 between the bottom of the tangential air inlet bulkhead 5 and the dynamic screen 12. A guide channel 10 is provided at the tangential air outlet 9. The tangential air inlet 8 is located on the outer wall of the main anti-explosive bulkhead 6, and the tangential air outlet 9 is located on the inner wall 17 of the main anti-explosive bulkhead. The two are connected by a guide channel.

[0022] When operating with the above technical solution, before the sensor is triggered, the main explosion suppressant chamber 13 and the tangential air inlet chamber 15 are under normal pressure, while the inert gas high-pressure chamber 14 contains high-pressure inert gas. After the sensor detects an explosion, solenoid valve 4 is immediately activated, and the inert gas enters the main explosion suppressant chamber 13 through the tangential air inlet 8. Under the combined action of the tangential air outlet 9 and the air guide groove 10 on the inner wall 17 of the main explosion suppressant chamber, a rotating flow field is generated. The solid explosion suppressant powder 11 generates a rotating flow field under the action of radial pressure difference and gas drag. The solid explosion suppressant powder 11 is drawn into the central low-pressure zone, forming a uniformly concentrated gas-solid two-phase suspension cloud. After 5-15ms, solenoid valve 7 is activated, and the high-pressure gas in the inert gas high-pressure chamber 14 is injected from the bottom of the main explosion suppressant chamber 13, providing axial thrust to the gas-solid two-phase suspension cloud. Figure 3 The dynamic screen 12 shown, due to the connection structure of the connecting spring 18 and the irregular guide plate 19, vibrates at high frequency under the impact of airflow, further breaking up any remaining particle clumps and making the gas-solid two-phase suspension cloud more uniform. The pressure relief valve 3 opens after the pressure surges, and the uniformly distributed anti-explosive agent in the gas-solid two-phase suspension cloud rushes out from the converging outlet 2, giving the sprayed anti-explosive agent cloud a larger diffusion angle, thereby achieving rapid and uniform release of the anti-explosive agent.

[0023] For the aforementioned tapered outlet 2, for the isentropic expansion process of the gas phase, the axial velocity of the outlet cross-section is... It is determined by the following relation:

[0024]

[0025] In the formula: Specific heat ratio of a gas : Specific gas constant of a gas : Total entrance temperature, Total inlet pressure The static pressure at the nozzle exit section. : Nozzle exit cross-sectional area The nozzle inlet cross-sectional area is within the converging tube. < The expansion of the airflow causes a decrease in the static pressure at the nozzle exit section. reduce. The smaller the ratio, the larger the value within the radical expression above. The larger the angular momentum, the more efficient the converging structure becomes in converting the pressure energy of the gas into axial kinetic energy. For a rotating flow with a tangential velocity component, the conservation of angular momentum can be expressed as:

[0026]

[0027] In the formula: : Average tangential velocity at the nozzle inlet. : Average effective radius of rotation at the inlet of the nozzle. : Tangential velocity at the outlet of the nozzle. : Outlet radius of the nozzle. Since it is a converging nozzle, , the outlet tangential velocity must increase:

[0028] The expansion of the coverage area is intuitively reflected in the expansion angle of the spray cloud The outlet total velocity

[0029]

[0030] The half-angle of the expansion of the cloud can be estimated by the following formula:

[0031]

[0032] Conclusion: Since the converging nozzle increases and at the same time, but is amplified by times significantly, the increase is usually much larger than . Therefore, the ratio increases, making the expansion angle increase, thereby achieving the effect of wider coverage.

[0033] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.​​

Claims

1. A solid explosion suppressant rotary cyclone homogenization device comprising a high-pressure inert gas chamber (14) and a main explosion suppressant chamber (13), characterized in that: The inert gas high-pressure cabin (14) is sleeved on the outer periphery of the main explosion inhibitor cabin (13), and a tangential air inlet cabin (15) is arranged on the outer wall of the main explosion inhibitor cabin (13); The bottom of the main explosion inhibitor cabin (13) is provided with the solid explosion inhibitor powder (11), and the top is provided with the dynamic mesh (12); a tapered outlet (2) and a pressure limiting valve (3) are arranged at the outlet of the main explosion inhibitor cabin (13); the electromagnetic valve one (4) is arranged on the tangential air inlet cabin wall (5); the tangential air inlet (8) is arranged on the main explosion inhibitor cabin wall (6) on the corresponding side of the electromagnetic valve one (4), and the tangential air inlet (8) is communicated to the tangential air outlet (9) arranged on the opposite side of the main explosion inhibitor cabin wall (6) through a gas guide channel; The inert gas high-pressure cabin (14) is communicated with the main explosion inhibitor cabin (13) through the electromagnetic valve two (7), and the inert gas high-pressure cabin (14) is communicated with the tangential air inlet cabin (15) through the electromagnetic valve one (4); In the dynamic mesh (12), the dynamic mesh screen (16) is connected to the inner wall (17) of the main explosion inhibitor cabin through the connecting spring (18), and the outer periphery of the dynamic mesh screen (16) is provided with irregular guide vanes (19).

2. A solid explosion suppression agent rotary cyclone homogenizing device according to claim 1, characterized in that: The tangential air inlet (8) and the tangential air outlet (9) are arranged on the main explosion inhibitor cabin wall (6) between the bottom end of the tangential air inlet cabin wall and the dynamic mesh.

3. A solid explosion suppression agent rotary cyclone homogenizing device according to claim 2, characterized in that: The tangential air outlet (9) is provided with a gas guide groove (10), the tangential air inlet (8) is arranged on the outer wall of the main explosion inhibitor cabin wall (6), and the tangential air outlet (9) is arranged on the inner wall (17) of the main explosion inhibitor cabin.

4. A solid explosion suppression agent rotary cyclone homogenizing device according to claim 1, characterized in that: The electromagnetic valve two (7) responds 5-15 ms after the electromagnetic valve one (4) responds.

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