Cement bin explosion-proof device

Abstract

The utility model relates to the technical field of cement bins, in particular to an anti-explosion bin device for a cement bin, which comprises a filter cone and a piston. The piston is arranged in the filter cone, so that the capacity in the filter cone is changed along with the movement of the piston. The filter cone is provided with an air inlet and a slag outlet which are communicated with the interior of the cement bin. The piston is further provided with an exhaust port. During use, the piston is moved to reduce the air pressure in the filter cone. Therefore, the air density in the filter cone is reduced, the buoyancy of dust particles in the air is further reduced, the dust particles fall to the bottom of the filter cone, and the purpose of purifying the air is achieved. And then the exhaust port is opened to exhaust the internal air. Meanwhile, deposited dust can be sent back to the cement bin by opening the slag outlet. In this way, air in the cement bin can be exhausted, and the purpose of pressure relief is achieved. And meanwhile, in the mode, no filter layer is adopted for filtering, so that blockage is avoided. And the service life is prolonged while the maintenance is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of cement silos, and more specifically, to an explosion-proof device for cement silos. Background Technology

[0002] Cement silos are commonly used to store dry, powdered cement. In operation, powdered cement is typically pumped into the silo. Specifically, airflow is introduced into the silo, and the cement follows the airflow into its interior. However, a large influx of airflow into the silo increases internal pressure, hindering normal operation. Therefore, current technology generally employs an exhaust system with a filter inside. This filters out dust from the exhaust airflow, preventing it from being released into the atmosphere.

[0003] However, existing filtration devices are generally filter screens, and dust is generated severely during the cement pouring process, requiring frequent filter screen replacements. Utility Model Content

[0004] The purpose of this invention is to provide a cement silo explosion-proof device that can reduce the risk of blockage and thus reduce maintenance.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] An explosion-proof device for a cement silo includes a filter hopper and a piston; the piston is disposed inside the filter hopper so that the volume inside the filter hopper changes with the movement of the piston; the filter hopper is provided with an air inlet and a slag outlet communicating with the interior of the cement silo; the piston is also provided with an exhaust port.

[0007] Furthermore, the filter hopper is located at the top of the cement silo; the slag outlet is located at the bottom of the filter hopper; and the slag outlet is equipped with a gate valve.

[0008] Furthermore, the slag outlet is equipped with two slide gate valves; the two slide gate valves are distributed vertically and a gap is reserved between them.

[0009] Furthermore, it also includes a reduction gearbox; the reduction gearbox is connected between the filter hopper and the cement silo.

[0010] Furthermore, a speed reduction plate is also provided inside the speed reduction tank; the speed reduction plate is positioned directly opposite the air inlet of the speed reduction tank so that the airflow impacts the speed reduction plate when it enters the speed reduction tank.

[0011] Furthermore, a filter box is installed inside the cement silo; the deceleration tank is connected to the interior of the filter box.

[0012] Furthermore, the deceleration tank is equipped with a valve between the filter hoppers.

[0013] Furthermore, a filter plate is also provided inside the filter bucket; the filter plate is disposed at the air inlet and the piston.

[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0015] In use, the explosion-proof cement silo device of this invention introduces air from the cement silo into the filter chamber through the air inlet, while all outlets of the filter chamber are closed. The piston is then moved to reduce the air pressure inside the filter chamber. This reduces the air density inside the filter chamber, further decreasing the buoyancy of airborne dust particles, causing them to fall to the bottom of the filter chamber, thus purifying the air. The exhaust port is then opened to release the internal air. Simultaneously, the slag outlet is opened to return the deposited dust to the cement silo. This method effectively releases air from the cement silo, achieving pressure relief. Furthermore, this method eliminates the need for a filter layer, preventing clogging. This reduces maintenance and extends the service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an explosion-proof device for a cement silo.

[0017] Figure 2 This is a schematic diagram of the internal structure of the explosion-proof device for a cement silo.

[0018] Attached reference numerals: 1-Cement silo, 2-Filter hopper, 3-Piston, 4-Air inlet, 5-Slag outlet, 6-Exhaust outlet, 7-Slide valve, 8-Reduction tank, 9-Reduction plate, 10-Filter box, 11-Valve, 12-Filter plate, 13-Motor, 14-Push rod, 15-Nut. Detailed Implementation

[0019] like Figure 1 and Figure 2 As shown, this utility model provides an explosion-proof device for a cement silo 1, including a filter hopper 2 and a piston 3. The filter hopper 2 is located at the top of the cement silo 1. The upper end of the filter hopper 2 is cylindrical, and the lower end is funnel-shaped. The piston 3 is located inside the upper end of the filter hopper 2, so that the volume inside the filter hopper 2 changes with the movement of the piston 3. The filter hopper 2 is provided with an air inlet 4 and a slag outlet 5 communicating with the inside of the cement silo 1. The piston 3 is also provided with an exhaust port 6. The slag outlet 5 is located at the bottom of the filter hopper 2. The slag outlet 5 is provided with a slide valve 7. The slide valve 7 can control the opening and closing of the slag outlet 5, thereby controlling the dust inside the filter hopper 2. The slide valve 7 can be driven by an electric push rod.

[0020] Specifically, such as Figure 2As shown, the push rod 14 of the piston 3 can be configured as a screw, with a nut 15 fitted to the screw. The nut 15 is rotatably fixed to the frame and located at the top of the filter hopper 2. The nut 15 is connected to the motor 13 via a belt. When the motor 13 rotates, the nut 15 rotates, and the push rod 14 rises and falls under the engagement of the thread, thereby driving the piston 3 to rise and fall. The exhaust port 6 is equipped with a valve 11 to control the discharge of gas from inside the filter hopper 2.

[0021] In use, the explosion-proof device for the cement silo 1 of this invention involves introducing air from the cement silo 1 into the filter hopper 2 through the air inlet 4 and closing all outlets of the filter hopper 2. Then, the piston 3 is moved to reduce the air pressure inside the filter hopper 2. This reduces the air density inside the filter hopper 2, further reducing the buoyancy of airborne dust particles, causing them to fall to the bottom of the filter hopper 2, thus purifying the air. The exhaust port 6 is then opened to expel the internal air. Simultaneously, the slag outlet 5 is opened to return the deposited dust to the cement silo 1. This method effectively releases air from the cement silo 1, achieving pressure relief. Furthermore, this method eliminates the need for a filter layer, preventing clogging. This reduces maintenance and extends the service life.

[0022] The principle of dust settling is explained below: Dust floats in the air due to buoyancy. The formula for buoyancy is F = ρgv, where F is the buoyancy, ρ is the air density, g is the acceleration due to gravity, and v is the volume of air displaced by the dust. During the upward movement of piston 3, only the air density ρ changes; other parameters remain constant. This means that if the volume inside filter hopper 2 doubles, the buoyancy force on the dust decreases by half. Therefore, as piston 3 moves upward, the buoyancy force on the dust gradually decreases, thus promoting dust settling.

[0023] In this embodiment, the slag outlet 5 is equipped with two slide gate valves 7. The two slide gate valves 7 are arranged vertically with a gap between them. In use, the air inlet is first opened to allow air from the cement silo 1 to enter the filter hopper 2. The piston 3 rises, creating a negative pressure inside the filter hopper 2, which causes dust to settle above the upper slide gate valve 7 at the bottom of the filter hopper 2. Then, the upper slide gate valve 7 is opened, allowing the dust to fall above the lower slide gate valve 7. Closing the upper slide gate valve 7 then isolates the dust from the filtered air. Subsequently, whether the lower slide gate valve 7 is opened or the gas inside the filter hopper 2 is discharged, the gas inside the filter hopper 2 will not interfere with the deposited dust.

[0024] This embodiment also includes a speed reduction tank 8. The speed reduction tank 8 is connected between the filter hopper 2 and the cement silo 1. A speed reduction plate 9 is also provided inside the speed reduction tank 8. The speed reduction plate 9 is positioned directly opposite the air inlet of the speed reduction tank 8 so that the airflow impacts the speed reduction plate 9 when entering the speed reduction tank 8.

[0025] When gas enters the deceleration tank 8 from the cement silo 1, the incoming gas first contacts the deceleration plate 9, which slows it down. After slowing down, the gas then enters the filter hopper 2. This prevents the gas from entering the filter hopper 2 too quickly, which could affect the settling rate.

[0026] In this embodiment, a filter box 10 is installed inside the cement silo 1. The deceleration tank 8 is connected to the interior of the filter box 10. The filter box 10 may be a mechanism equipped with filter cloth, so that the gas is coarsely filtered before entering the deceleration tank 8.

[0027] In this embodiment, a valve 11 is provided between the deceleration tank 8 and the filter hopper 2. The valve 11 can control the opening and closing of the connection between the deceleration tank 8 and the filter hopper 2.

[0028] In this embodiment, a filter plate 12 is also provided inside the filter hopper 2. The filter plate 12 is located between the air inlet 4 and the piston 3. This ensures that the gas, after being filtered inside the filter hopper 2, still needs to pass through the filter plate 12 before being discharged, thus guaranteeing the cleanliness of the discharged gas. At the same time, the filter hopper 2 also prevents dust and other impurities from reaching the area where the piston 3 moves, avoiding dust affecting the operational stability of the piston 3. In addition, when the filter box 10 or the filter plate 12 is blocked, closing the exhaust port 6 and the slag discharge port and moving the piston 3 downward will cause the airflow to reverse through the filter box 10 into the cement silo 1, thereby achieving a backflushing effect. This cleans the filter box 10 and the filter plate 12.

[0029] Two baffle valves 7 are installed at the bottom of the filter hopper 2 so that the dust falling when the upper baffle valve 7 is opened falls to the lower baffle valve 7. Then, closing the upper baffle valve 7 separates the filtered gas from the dust, so that the gas will not carry away the settled dust when it is discharged.

Claims

1. A cement bin explosion-proof bin device, characterized in that: The filter is arranged on the top of the cement bin, and the slag outlet is arranged at the bottom of the filter.

2. The cement silo explosion venting apparatus of claim 1, wherein: The slag outlet is provided with a plug valve.

3. The cement silo explosion venting apparatus of claim 2, wherein: The slag outlet is provided with two plug valves which are arranged in an up-down manner and a gap is reserved between the two plug valves.

4. The cement silo explosion venting apparatus of claim 3, wherein: The speed reduction tank is further provided with a speed reduction plate which is arranged opposite to the air inlet of the speed reduction tank so that the airflow entering the speed reduction tank impacts the speed reduction plate.

5. The cement silo explosion venting apparatus of claim 4, wherein: The cement bin is provided with a filter box, and the speed reduction tank is communicated with the inside of the filter box.

6. The cement silo explosion venting apparatus of claim 5, wherein: The speed reduction tank is provided with a valve between the filter.

7. The cement silo explosion venting apparatus of claim 6, wherein: The filter is further provided with a filter plate which is arranged between the air inlet and the piston.

8. The cement silo explosion venting apparatus of claim 7, wherein: ​

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