A shredder plant explosion protection device

Abstract

The application relates to the technical field of explosion-proof and fireproof technology, and particularly discloses a pulverizing workshop explosion-proof device which comprises a shell, a mounting plate for separating the internal space of the shell into upper and lower two parts, a filter cartridge vertically mounted at the bottom of the mounting plate, a first impact part capable of impacting the top surface of the mounting plate, non-combustible gas flow compressed during impact, a fan capable of bearing the air flow thrust force, and liquid for immersing the fan. The scheme solves the dust removal safety problem of the existing dust removal device of the pulverizing workshop.

Description

Technical Field

[0001] This invention relates to the field of explosion-proof and fire-proof technology, specifically to an explosion-proof device for a crushing workshop. Background Technology

[0002] In the sorghum brewing process, sorghum needs to be crushed into 2, 4, 6, or 8 pieces, eliminating any whole grains. The purpose of crushing is to break down the sorghum, release starch, and increase the surface area exposed to heat during cooking. This facilitates the starch's absorption of water and expansion upon heating in subsequent processes, while also promoting gelatinization and increasing the contact area between the raw materials and the starter culture, ensuring thorough fermentation. Because the crushing process generates a large amount of sorghum dust that permeates the workshop, there is a risk of dust explosion if exposed to a source of ignition. Therefore, a dedicated dust removal system is installed in the workshop. The air inlet of the dust removal system is directed towards the crushing equipment and connected to the dust removal system itself on the upper floor of the crushing workshop via a pipe passing through the ceiling. The dust removal system includes filter cartridges for filtering dust and a smokeless pressure relief device. An explosion-proof valve is installed in the pipe to close the pipe.

[0003] When using this dust removal device, the dust accumulated inside the device needs to be cleaned every once in a while. When cleaning, the side door on the device casing needs to be opened, and the worker can use a sweeping tool to sweep out the dust from the door and then pack it into a cart or bag and transport it out. Its drawbacks are as follows: 1. If a source of ignition enters the pipe, the dust explosion that occurs inside the device can be protected and isolated by the explosion-proof devices installed inside the pipe and on the shell. The principle is that the explosion-proof valve inside the pipe closes when an explosion occurs, and the flame-retardant screen in the smokeless pressure relief device can absorb heat and cool down while allowing airflow to pass through, and prevent flames and dust from escaping, thus avoiding a larger safety accident caused by flames. However, when cleaning manually, the cabinet door is open, causing a large amount of dust to spread and come into contact with the outside. At this time, the explosion-proof device, which is only effective in the enclosed space, cannot work. Once the static electricity carried by the human body or a tiny source of ignition from the outside comes into contact with the dust dispersed in the air, there will be an explosion risk, posing a great safety hazard. 2. Since the dust accumulates inside the dust removal device, it needs to be cleaned out manually bit by bit. The manual labor intensity is high, and the long cleaning time increases the probability of an explosion. Therefore, it is necessary to strengthen the safety of personnel operation. Summary of the Invention

[0004] The present invention provides an explosion-proof device for a crushing workshop to solve the dust removal safety problem of existing dust removal devices in crushing workshops.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an explosion-proof device for a crushing workshop, comprising a housing, a plurality of filter cartridges inside the housing, a pipe connecting the air inlet and outlet of the housing, an explosion-proof valve inside the air inlet pipe, and a smokeless pressure relief device connecting the interior of the housing. The housing is provided with a horizontal plate in the middle that can divide the interior space of the housing into two parts. A horizontal mounting plate is provided below the horizontal plate. The plurality of filter cartridges are vertically and detachably mounted on the bottom surface of the mounting plate. An inlet valve for dust-laden gas to flow through is provided on the housing side next to the filter cartridges. An air outlet pipe that can penetrate the horizontal plate and the mounting plate is connected to the top of the filter cartridges. The upper end of the air outlet pipe extends to the outside of the housing.

[0006] The air outlet duct is connected to a sliding seal with a first impact part that can reciprocate to impact a horizontal plate. The outer edge of the movement trajectory of the first impact part is sealed with a first sealing part. The first sealing part is connected to an external flame-retardant gas source through a first one-way valve. A hollow rotating shaft is fixed at the central axis of the housing. The upper end of the rotating shaft is connected to the first sealing part through a second one-way valve. The first one-way valve only allows flame-retardant gas to flow from the gas source into the first sealing part, and the second one-way valve only allows flame-retardant gas to flow from the first sealing part into the rotating shaft.

[0007] The lower end of the rotating shaft extends to the bottom of the housing, which is filled with water. A foaming net submerged in water is fitted onto the lower end of the rotating shaft. The first fan blade and the second fan blade are connected to the rotating shaft above the foaming net in sequence from top to bottom along the length of the rotating shaft. The first fan blade and the second fan blade are fixed by a connector and can rotate synchronously. The first fan blade is in contact with the water surface, while the second fan blade is submerged in water.

[0008] The basic principle of this solution is as follows: During normal use of the explosion-proof device, the explosion-proof fan in the system sends the dust-laden gas from the air inlet of the housing to the air outlet of the housing. After the dust-laden gas enters the housing, as the gas passes through the filter cartridge from the outside, the mesh on the filter cartridge blocks and intercepts the dust. The purified gas enters the air outlet pipe from the inside of the filter cartridge along the opening at the top of the filter cartridge. If a source of ignition enters the housing and causes an explosion, the explosion-proof valve closes, the housing forms a sealed space, and the explosive gas flow is released from the smokeless pressure relief device.

[0009] When the dust accumulated inside the explosion-proof device needs to be cleaned, the inlet valve is closed, and the non-combustible gas flows into the first sealing part from the outside. The first impact part is activated to impact the horizontal plate, and the horizontal plate vibrates, causing a large amount of dust on the filter cartridge below to fall off. At the same time, the first impact part squeezes the non-combustible gas in the first sealing part, causing the non-combustible gas to flow into the rotating shaft through the second one-way valve and be released from the bubble net at the end of the rotating shaft. The mesh of the bubble net disperses the non-combustible gas into tiny bubbles under the surrounding water flow. When the bubbles pass through the first fan and the second fan, they drive the two fans to rotate. The second fan stirs the water flow to form a vortex, and the first fan carries the dust that has fallen on the water surface to mix with the water flow. The non-combustible gas then flows out through the air outlet pipe inside the filter cartridge. This process is repeated to replenish the gas, and finally the sewage at the bottom of the shell is discharged to complete the dust cleaning work.

[0010] The beneficial effects of this plan are:

[0011] 1. When cleaning dust from existing explosion-proof devices, opening the casing connects the interior to the external space, rendering the original explosion-proof device ineffective. If static electricity from workers or external ignition sources come into contact with dust inside the casing, an explosion could occur, endangering personal safety and making the explosion range difficult to control. This solution uses a first impact unit inside the sealed casing to directly shake off the dust from the filter cartridge, replacing manual cleaning. Simultaneously, a non-combustible gas drives a fan to agitate the water flow at the bottom of the casing, mixing the shaken-off dust with the water. Workers only need to discharge the wastewater at the end, avoiding the risk of explosion caused by a large amount of dust directly contacting the outside.

[0012] 2. Fine bubbles are generated by the bubble net at the bottom of the rotating shaft. These fine bubbles further disperse dust lumps and reduce clumping. At the same time, the dense bubbles increase the contact area with the dust on the water surface after floating on the water surface, adhering to the dust, wetting the dust and mixing it into the water. Furthermore, the rising process of the bubbles causes the water flow to accelerate the mixing rate.

[0013] Furthermore, the first impact part is a piston, and an electric push rod is provided on the top of the piston. The top of the piston is fixed to the output end of the electric push rod. The first sealing part is a vertical cylinder set between the horizontal plate and the top of the housing. The air outlet pipe, the cylinder and the piston are coaxially arranged.

[0014] Furthermore, the flame-retardant gas is nitrogen. Nitrogen is chemically very stable and does not pose a threat to the environment or climate.

[0015] Furthermore, the bottom of the housing includes an upward-opening, removable water tank. The water outlet is located on the side wall of the water tank, and one end of the water outlet, which connects to the outside, is sealed with a removable plug. The removable water tank facilitates cleaning of the machine, allowing workers to directly move the water tank or drain wastewater from the water outlet.

[0016] Furthermore, a transparent water level indicator window is installed on the side wall of the water tank. This allows staff to easily observe the water level when draining or replenishing water.

[0017] Furthermore, the bubble-forming mesh is a horizontal rectangular block screen, and the mesh size gradually decreases from bottom to top along the height of the bubble-forming mesh. As the bubbles gradually rise, they are dispersed into finer bubbles, increasing the contact area with dust.

[0018] Furthermore, the filter cartridge is a nano flame-retardant filter cartridge.

[0019] Furthermore, a side-opening door is provided on the housing below the mounting plate. This facilitates filter cartridge replacement and machine maintenance.

[0020] Furthermore, both the first and second fan blades are horizontally arranged, the connecting member is a spline, and a bearing is provided between the spline and the rotating shaft.

[0021] Furthermore, vertical grooves are formed on both ends of the mounting plate that contact the housing. Vertical elastic elements are provided at the bottom of the grooves. The two ends of the mounting plate that contact the housing sidewalls extend towards the housing sidewalls, with their bottom surfaces contacting the top walls of the elastic elements. The elastic force of the elastic elements prolongs the vibration time of the mounting plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method:

[0024] The reference numerals in the accompanying drawings include: housing 1, filter cartridge 2, air inlet pipe 31, air outlet pipe 32, smokeless pressure relief device 4, inlet valve 5, mounting plate 6, piston 71, cylinder 72, first one-way valve 8, second one-way valve 9, rotating shaft 10, first fan blade 11, second fan blade 12, water tank 13, water outlet hole 131, pipe plug 132, aerator 14, and elastic element 15.

[0025] The basic implementation examples are as follows: Figure 1 As shown:

[0026] In this embodiment, the explosion-proof device is installed on the upper floor of the sorghum crushing workshop. The housing 1 of the explosion-proof device is rectangular, and the housing 1 is divided into upper and lower spaces by a horizontal plate. The left side wall of the housing 1 in the lower space is connected to the sorghum crushing workshop through an air inlet duct 31. A smokeless pressure relief device 4 is installed on the right side wall of the housing 1 in the lower space, and the smokeless pressure relief device 4 is connected to the lower space. A horizontal mounting plate 6 is slidably connected to the top of the lower space. The mounting plate 6 is inverted "convex" in shape, and its left and right ends are embedded in the side wall of the housing 1. An elastic element 15 is fixed on the side wall of the housing 1 facing the step surface of the mounting plate 6. In this embodiment, the elastic element 15 includes a cylindrical spring, and a cylindrical block with an arc-shaped top surface is fixed to the top of the cylindrical spring. The height of the cylindrical block is less than the height of the step of the mounting plate 6, thereby increasing the contact area between the mounting plate 6 and the elastic element 15, ensuring that the elastic element 15 is always in close contact with the mounting plate 6, so that the mounting plate 6 can accurately perform vertical reciprocating motion.

[0027] Multiple filter cartridges 2 are vertically installed at intervals along the length of the bottom surface of the mounting plate 6. In this embodiment, the filter cartridges 2 are nano flame-retardant filter cartridges 2, and there are four of them. Each filter cartridge 2 is fixed to the bottom surface of the mounting plate 6 by a nut and screw assembly. The filter cartridge 2 has a structure that is closed at the bottom and open at the top. A through hole is vertically inserted at the opening of each filter cartridge 2 on the mounting plate 6. An air outlet pipe 32 is vertically sealed in the through hole. The air outlet pipe 32 extends upward into the upper space of the housing 1 and converges into an external pipe, ensuring that the airflow in the device can flow to the outside after passing through the filter cartridge 2. In this embodiment, the air outlet pipe 32 is made of rigid flame-retardant material. Each air outlet pipe 32 is externally and slidably connected to a piston 71. The top of the piston 71 is fixed to the output end of the telescopic assembly, allowing the piston 71 to slide vertically up and down along the air outlet pipe 32. A vertical cylinder 72 is fixed along the entire vertical displacement trajectory of the piston 71. The upper end of the cylinder 72 is fixed to the inner top wall of the housing 1, and the lower end of the cylinder 72 is fixed to a horizontal plate. The cylinder 72 is slidably connected to the outer wall of the piston 71, and a pipe for connecting to an external gas source is opened at the bottom of the cylinder 72. A first one-way valve 8 is installed inside the pipe. In this embodiment, the external gas source is a non-flammable gas, such as nitrogen, carbon dioxide, or inert gas; nitrogen is used here. The first one-way valve 8 only allows nitrogen to enter the cylinder 72 below the piston 71 from the outside. A vertical and hollow rotating shaft 10 is provided at the central axis of the housing 1. The upper end of the rotating shaft 10 extends through the horizontal plate and the mounting plate 6 into the upper space. The rotating shaft 10 is fixed to the horizontal plate. The bottom of each cylinder 72 is connected to the rotating shaft 10 through a second one-way valve 9. The second one-way valve 9 only allows nitrogen gas to flow from the inside of the cylinder 72 to the rotating shaft 10.

[0028] The lower end of the rotating shaft 10 extends to the bottom of the housing 1, where water introduced from the outside accumulates. The lower end of the rotating shaft 10 is immersed in the water, and a bubble net 14 is horizontally fixed at the bottom of the rotating shaft 10. The bubble net 14 is a rectangular block with multiple sieve holes. The bubble net 14 covers the air outlet at the bottom of the rotating shaft 10, so that when the airflow passes through the outlet of the rotating shaft 10, it can be dispersed into multiple small bubbles by the sieve holes on the bubble net 14. The mesh size of the bubble net 14 gradually transitions from low to high and from large to small along the height of the bubble net 14. As the small bubbles float to the surface in the water, they are gradually divided into tiny bubbles with smaller pores and a greater number of them.

[0029] Above the bubble-forming net 14, along the rotating shaft 10, the first fan blade 11 and the second fan blade 12 are connected in sequence from top to bottom. The second fan blade 12 is completely submerged in water, while the first fan blade 11 is located in contact with the water surface. When the bubbles pass through the water surface from bottom to top, the second fan blade 12 is pushed and agitated by the airflow. Since the first fan blade and the second fan blade are fixed together by a spline, and the spline is connected to the rotating shaft by a bearing, the first fan blade 11 also agitates the water surface, thereby causing the water at the bottom of the shell 1 to generate a vortex at the bottom.

[0030] The bottom of the housing 1 is a detachable water tank 13. The top wall of the water tank 13 is connected to the housing 1 via a locking lug. A pair of buckles are provided on both sides of the joint between the water tank 13 and the housing 1 to ensure a secure fixation while facilitating removal. A horizontally penetrating water outlet 131 is opened at the lower end of the side wall of the water tank 13. A pipe plug 132 is secured to the outer side of the water outlet 131, and the pipe plug 132 is connected to the side wall of the water tank 13 via a chain. This water outlet 131 allows water to be added to or drained from the water tank 13 as needed. A vertical window is opened on the side wall of the water tank 13, with a transparent water level indicator installed inside to facilitate water level assessment. A side-opening door is installed on the side housing 1 next to the filter cartridge 2 via a hinge. The overall height of the side-opening door is between the horizontal plate and the top surface of the water tank 13, facilitating replacement of the filter cartridge 2 and inspection and cleaning of the internal components.

[0031] The specific implementation process is as follows:

[0032] During normal use, the inlet valve 5 of this explosion-proof device is opened, and the dust-laden airflow is drawn into the air duct 31 by the explosion-proof fan in the system, and flows into the lower space of the housing 1 along the air inlet duct 31. The dust in the airflow is blocked by the filter cartridge 2, and the pure airflow flows out from the inside of the filter cartridge 2 along the air outlet duct 32. Over time, a large amount of dust clogging the mesh accumulates on the filter cartridge 2. When cleaning the dust, the inlet valve 5 is closed, and nitrogen is supplied into the cylinder 72 from an external nitrogen source. The piston 71 moves upward to the highest displacement point, and the telescopic component is activated to make the piston 71 strike the horizontal plate downward. The impact force causes the mounting plate 6 to vibrate, and the dust on the filter cartridge 2 falls off and falls downward. The mounting plate 6 is held in place by the column spring. Under the elastic force, the cylinder vibrates back and forth. At the same time, the nitrogen gas inside the cylinder 72 is compressed by the piston 71 and enters the rotating shaft 10 through the second one-way valve 9. It flows out from the bubble net 14 at the bottom of the rotating shaft 10 to form a large number of tiny bubbles, which drive the two fan blades to rotate. The upper first fan blade 11 carries the dust into the water, and the lower second fan blade 12 drives the water flow to form a vortex. After the piston 71 is pressed down once, the nitrogen gas source replenishes nitrogen into the cylinder 72, so that the airflow continuously impacts the fan blades, causing the dust to gradually dissolve into the water. After the dust removal is completed, the staff only needs to discharge the sewage through the water outlet 131 or remove the water tank 13 and transport it to the sewage treatment plant, and then add clean water to complete the dust removal work of the explosion-proof device.

[0033] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An explosion-proof device for a crushing workshop, comprising a housing, a plurality of filter cartridges inside the housing, a pipe connecting the air inlet and air outlet of the housing, an explosion-proof valve inside the air inlet pipe, and a smokeless pressure relief device connecting the interior of the housing, characterized in that: The middle part of the shell is provided with a horizontal plate for dividing the internal space of the shell into two parts, a horizontal mounting plate is arranged below the horizontal plate, the plurality of filter cartridges are vertically and detachably mounted on the bottom surface of the mounting plate, an inlet valve for the dust-containing gas to flow through is arranged on the shell beside the filter cartridges, an air outlet pipe penetrating through the horizontal plate and the mounting plate is communicated with the top of the filter cartridges, and the upper end of the air outlet pipe extends to the outside of the shell; A first impact part reciprocally impacting the horizontal plate is slidably connected with the air outlet pipe, the outer edge of the movement track of the first impact part is sealingly connected with a first sealing part, the first sealing part is communicated with an external fire-retardant gas source through a first one-way valve, a hollow rotating shaft is fixed at the middle axis of the shell, the upper end of the rotating shaft is communicated with the first sealing part through a second one-way valve, the first one-way valve only allows the fire-retardant gas to flow from the gas source to the first sealing part, and the second one-way valve only allows the fire-retardant gas to flow from the first sealing part to the rotating shaft; The lower end of the rotating shaft extends to the bottom of the shell, the bottom of the shell is filled with water, a water outlet hole communicating with the outside is formed in the bottom wall of the shell, a bubbling net immersed in the water is arranged on the lower end of the rotating shaft, and a first fan blade and a second fan blade are rotationally connected to the rotating shaft in sequence from top to bottom along the length direction of the rotating shaft above the bubbling net, the first fan blade is in contact with the water surface, and the second fan blade is immersed in the water; The first impact part is a piston, an electric push rod is arranged on the top of the piston, and the top of the piston is fixed with the output end of the electric push rod, the first sealing part is a vertical cylinder arranged between the horizontal plate and the top of the shell, and the air outlet pipe, the cylinder and the piston are coaxially arranged; The bottom of the shell comprises a detachable water tank opening upward, and the water outlet hole is arranged on the side wall of the water tank and sealed with a detachable pipe plug at the end communicating with the outside; The first fan blade and the second fan blade are both horizontally arranged, the connecting piece is a spline, and a bearing is arranged between the spline and the rotating shaft; Vertical sliding grooves are arranged on the two end side walls of the shell in contact with the mounting plate, vertical elastic members are arranged at the bottom of the sliding grooves, and the two ends of the mounting plate in contact with the side walls of the shell extend to the side walls of the shell and the bottom surface thereof is in contact with the top wall of the elastic members.

2. A mill explosion protection device according to claim 1, characterized in that: The fire-retardant gas is nitrogen.

3. A mill explosion protection device according to claim 1, characterized in that: A transparent water level indicating window is arranged on the side wall of the water tank.

4. A mill explosion containment device according to claim 1, wherein: The bubbling net is a horizontal rectangular mesh screen, and the mesh size of the screen gradually decreases from bottom to top along the height of the bubbling net.

5. A mill explosion containment device according to claim 1, wherein: The filter cartridges are nano fire-retardant filter cartridges.

6. A mill explosion containment device according to claim 1, wherein: A side opening door is arranged on the shell below the mounting plate.

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