Dust explosion-proof device

Abstract

The utility model discloses a dust explosion-proof device which comprises a box body, a filtering assembly and a fan, and a containing cavity is formed in the box body. The filtering assembly comprises a filtering part and a driving part, the filtering part is arranged in the box body in a sliding mode, the containing cavity is divided into a first cavity and a second cavity, the filtering part can filter dust passing through airflow, and the driving part is in transmission connection with the filtering part so as to drive the filtering part to vibrate. The draught fan comprises a draught fan body, the air inlet end of the draught fan body communicates with the workshop, and the air outlet end of the draught fan body communicates with the first cavity so that air in the workshop can be guided into the first cavity. The draught fan sucks air in the workshop and guides the air in the workshop to the first cavity, airflow enters the second cavity after passing through the filtering piece, the filtering piece can filter dust in the airflow, and therefore the effect of purifying the air in the workshop is achieved. The driving part drives the filtering part to vibrate, so that dust on the filtering part falls off, and excessive dust is prevented from being accumulated on the filtering part. The filtering piece is prevented from being blocked, so that the dust explosion-proof device can be continuously used for a long time.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof equipment, specifically to a dust explosion-proof device. Background Technology

[0002] Dust refers to solid particles suspended in the air. It is commonly referred to by many names, such as dust, ash, smoke, mineral dust, sand, and powder.

[0003] In many processing and production environments or locations with flammable and explosive dust, large amounts of dust often float in the air. If the dust concentration in the air increases, it can easily explode upon contact with a spark or high temperature. Therefore, it is necessary to collect and clean the dust promptly to prevent dust explosions. Existing dust explosion prevention devices can be found in patent application number CN201911040489.4, which uses a fan to draw air from the workshop and filters the dust from the air through filters. However, with the use of dust explosion prevention devices, accumulated dust can clog the filters. Therefore, frequent shutdowns are required to clean the filters.

[0004] Therefore, how to avoid frequent shutdowns of dust explosion-proof devices for cleaning filter components is a technical problem that urgently needs to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a dust explosion-proof device to solve the technical problem that dust explosion-proof devices in the prior art require frequent shutdowns for cleaning of filter components.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a dust explosion-proof device, which includes:

[0008] The housing has a cavity inside;

[0009] A filter assembly includes a filter element and a drive element. The filter element is slidably housed within the housing and divides the accommodating cavity into a first chamber and a second chamber. The filter element filters out dust from the passing airflow. The drive element is driven by the filter element to vibrate it.

[0010] A fan, the air inlet of which is connected to the workshop, and the air outlet of which is connected to the first chamber, so as to introduce air from the workshop into the first chamber.

[0011] In some embodiments, the air inlet surface of the filter faces the air outlet end of the fan, and the filter is slidably housed within the housing along its radial direction.

[0012] In some embodiments, a groove is provided on the inner wall of the box, and the filter element includes a support frame and a plurality of filter screens. The support frame is slidably disposed in the groove, and the plurality of filter screens are spaced apart and embedded in the support frame.

[0013] In some embodiments, a storage groove is provided at the bottom of the support frame, which corresponds to the filter screen and is used to collect dust that falls from the filter screen.

[0014] In some embodiments, the support frame has a dust removal port communicating with the storage slot, and the support frame also has a baffle that is detachably installed on the dust removal port.

[0015] In some embodiments, the top of the filter screen is tilted toward the air outlet of the fan.

[0016] In some embodiments, the drive includes a cam and a motor. The cam is rotatably mounted on the housing, and the wheel surface of the cam presses against the filter element. The motor is drively connected to the cam, and the motor drives the cam to rotate so as to cause the filter element to vibrate.

[0017] In some embodiments, the filter assembly further includes an elastic element, one end of which is connected to the inner wall of the housing and the other end of which is connected to the filter element. The elastic element has an elastic force that pushes the filter element away from the inner wall of the housing.

[0018] In some embodiments, the filter element has a guide hole, and the elastic element includes a guide rod and a spring. One end of the guide rod is connected to the housing, and the other end passes through the guide hole. The spring is sleeved on the guide rod, with one end of the spring pressing against the housing and the other end pressing against the filter element.

[0019] In some embodiments, the housing has an air inlet and an air outlet, the air inlet being connected to the first chamber and the air outlet being connected to the second chamber.

[0020] Air is drawn into the workshop by a fan and directed to the first chamber. After passing through a filter, the air enters the second chamber. The filter removes dust particles from the airflow, thus purifying the air. A drive mechanism causes the filter to vibrate, dislodging dust particles and preventing excessive dust accumulation. This dust explosion-proof device prevents filter clogging, allowing for continuous long-term use and avoiding frequent shutdowns for filter cleaning. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the dust explosion-proof device provided in this embodiment of the utility model;

[0022] Figure 2 This is a partial schematic diagram of point A provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached drawings: housing 100, first chamber 110, second chamber 120, slide 130, air inlet 140, air outlet 150, filter assembly 200, filter element 210, support frame 211, storage slot 2111, dust removal port 2112, baffle 2113, guide hole 2114, filter screen 212, driving component 220, cam 221, motor 222, elastic element 230, guide rod 231, spring 232, fan 300, fan 310, protective cover 320. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] To address the technical problem of frequent shutdowns for cleaning the filter element 210 in dust explosion-proof devices, this utility model provides a dust explosion-proof device that can prevent the filter element 210 from clogging, allowing the dust explosion-proof device to be used continuously for a long time and avoiding frequent shutdowns for cleaning the filter element 210.

[0026] It should be noted that the dust explosion prevention device of this utility model is used in, but not limited to, workshops with combustible dust. For ease of explanation, this utility model will only use the dust explosion prevention device applied to a workshop with combustible dust as an example for explanation. The principle of the dust explosion prevention device applied to other types of equipment is essentially the same as that applied to a workshop with combustible dust, and will not be described in detail here.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a dust explosion-proof device according to an embodiment of the present invention. The dust explosion-proof device includes a housing 100, a filter assembly 200, and a fan 300. The housing 100 has a receiving cavity. The filter assembly 200 includes a filter element 210 and a drive element 220. The filter element 210 is slidably built into the housing 100 and divides the receiving cavity into a first chamber 110 and a second chamber 120. The filter element 210 can filter out dust in the airflow. The drive element 220 is connected to the filter element 210 to drive the filter element 210 to vibrate. The fan 300 includes a fan 310. The air inlet of the fan 310 is connected to the workshop, and its air outlet is connected to the first chamber 110 to introduce air from the workshop into the first chamber 110.

[0028] In this embodiment, a fan 310 draws air from the workshop and directs it to the first chamber 110. The airflow passes through a filter 210 and enters the second chamber 120. Since the filter 210 removes dust from the airflow, it purifies the air in the workshop. The drive unit 220 causes the filter 210 to vibrate, causing dust to fall off and preventing excessive dust accumulation. This dust explosion-proof device prevents the filter 210 from clogging, allowing for continuous long-term use and avoiding frequent shutdowns for cleaning the filter 210.

[0029] To better understand the technical solution of this application, the principle of dust explosion is briefly introduced below:

[0030] A dust explosion refers to a chemical reaction in which a dust cloud formed by combustible dust mixing with air in a confined space is ignited by an ignition source, causing the dust-air mixture to burn rapidly and resulting in a sharp increase in temperature and pressure.

[0031] The likelihood of a dust explosion depends on the physical and chemical properties of the dust and environmental conditions. Generally, substances with higher heat of combustion are more prone to explosion, such as coal dust, carbon, and sulfur. Substances with rapid oxidation rates are also prone to explosion, such as magnesium powder, aluminum powder, ferrous oxide, and dyes. Dusts that easily become charged are also highly likely to cause explosions, such as synthetic resin powder, fibrous dust, and starch. These poorly conductive substances accumulate static electricity due to friction with machinery or air; when this static electricity reaches a certain level, it discharges, producing an electric spark that becomes the ignition source for an explosion.

[0032] Dust explosions frequently occur in production and processing environments where aluminum powder, zinc powder, aluminum processing and grinding powder, various plastic powders, intermediates for organic synthetic drugs, wheat flour, sugar, sawdust, dyes, bakelite ash, milk powder, tea powder, tobacco powder, coal dust, and plant fiber dust are generated. Therefore, timely removal of dust from the workshop air is an effective means of preventing dust explosions.

[0033] In some embodiments, the air inlet surface of the filter element 210 faces the air outlet end of the fan 310, and the filter element 210 is slidably housed within the housing 100 along its radial direction. In this embodiment, since the air inlet surface of the filter element 210 faces the air outlet end of the fan 310, the airflow discharged by the fan 310 can directly impact the filter element 210, so that the airflow can quickly pass through the filter element 210, thereby improving the filtration efficiency of the filter element 210.

[0034] Any implementation of the filter element 210 that allows it to slide within the housing 100 is feasible. In some embodiments, a groove 130 is provided on the inner wall of the housing 100. The filter element 210 includes a support frame 211 and several filter screens 212. The support frame 211 is slidably disposed in the groove 130, and the filter screens 212 are spaced apart and embedded in the support frame. In this embodiment, the filter screens 212 are spaced apart, and the airflow passes through each filter screen 212 sequentially, effectively removing dust from the airflow. The support frame 211 slides along the groove 130, giving it a stable sliding trajectory. The reciprocating sliding of the support frame 211 within the groove 130 causes the filter screens 212 to vibrate, causing the dust accumulated on the filter screens 212 to fall off and preventing the filter screens 212 from becoming clogged.

[0035] Based on the above embodiments, in some embodiments, a collection groove 2111 is provided at the bottom of the support frame 211. The collection groove 2111 is located below the filter screen 212 and is used to collect dust that falls from the filter screen 212. In this embodiment, the dust that falls from the filter screen 212 due to vibration will be collected by the collection groove 2111, so that the dust can be collected and prevented from scattering everywhere.

[0036] In some embodiments, the support frame 211 has a dust collection port 2112 communicating with the collection slot 2111, and the support frame 211 also has a baffle 2113, which is detachably installed on the dust collection port 2112. In this embodiment, the dust collected in the collection slot 2111 can be discharged through the dust collection port 2112. During normal use of the dust explosion-proof device, the dust collection port 2112 can be closed by the baffle 2113, at which time the collection slot 2111 can receive and collect the falling dust. When the dust explosion-proof device is shut down, the baffle 2113 can be adjusted to open the dust collection port 2112, so that the dust in the collection slot 2111 can be discharged through the dust collection port 2112.

[0037] Based on the above embodiments, in some embodiments, the top of the filter 212 is tilted towards the air outlet of the fan 310. It is understood that most dust accumulates on the side of the filter 212 facing the air outlet of the fan 310. Therefore, tilting the top of the filter 212 towards the air outlet of the fan 310 makes it easier for the dust accumulated on this side to fall off during vibration.

[0038] Any implementation of the drive component 220 that can drive the filter element 210 to reciprocate is feasible. For example, the drive component 220 can be a cylinder that moves frequently back and forth, with the piston rod and cylinder body connected to the filter element 210 and the housing 100 respectively, thus using the cylinder to drive the filter element to vibrate. The drive component 220 can also be a vibration motor, with the vibration motor mounted on the housing 100 and its output end connected to the filter element 210, thus using the vibration motor to drive the filter element to vibrate. In some embodiments, the drive component 220 includes a cam 221 and a motor 222. The cam 221 is rotatably mounted on the housing 100, and the wheel surface of the cam 221 presses against the bottom end of the filter element 210. The motor 222 is connected to the cam 221 and drives the cam 221 to rotate, thereby causing the filter element 210 to vibrate. Motor 222 drives cam 221 to rotate. As the wheel surface of cam 221 presses against the bottom end of filter element 210, when the larger end of cam 221 presses against the bottom end of filter element 210, cam 221 overcomes the gravity of filter element 210, causing filter element 210 to move upwards. When the smaller end of cam 221 presses against filter element 210, filter element 210 falls under the action of gravity. This reciprocating motion causes filter element 210 to vibrate back and forth.

[0039] Based on the above embodiments, in some embodiments, the filter assembly 200 further includes an elastic member 230. One end of the elastic member 230 is connected to the inner wall of the housing 100, and the other end is connected to the filter element 210. The elastic member 230 has an elastic force that pushes the filter element 210 away from the inner wall of the housing 100. In this embodiment, since the elastic force of the elastic member 230 can push the filter element 210 away from the inner wall of the housing 100, when the filter element 210 approaches the inner wall of the housing 100, the elastic member 230 will prevent the filter element 210 from continuing to move. The elastic member 230 buffers the filter element 210, thereby preventing the filter element 210 from violently impacting the inner wall of the housing 100 and avoiding damage to the filter element 210 due to impact.

[0040] In some embodiments, the filter element 210 may have a guide hole 2114, and the elastic element 230 may include a guide rod 231 and a spring 232. One end of the guide rod 231 is connected to the housing 100, and the other end passes through the guide hole 2114. The spring 232 is sleeved on the guide rod 231, with one end pressing against the housing 100 and the other end pressing against the filter element 210. Because the guide hole 2114 is sleeved on the guide rod 231, the filter element 210 can slide along the guide rod 231. Since both ends of the spring 232 press against the housing 100 and the filter element 210 respectively, the spring 232 has an elastic force that pushes the filter element 210 away from the housing 100, thereby buffering the impact on the filter element 210.

[0041] It should be emphasized here that the filter element 210 described in the above embodiments all reciprocates along its radial direction, but this does not mean that the filter element 210 can only vibrate along the radial direction. For example, the filter element 210 can reciprocate along the axial direction, or even rotate back and forth with a small amplitude. Any method that allows the filter element 210 to vibrate is feasible. Making the filter element 210 vibrate along its radial direction is merely a preferred embodiment for reducing dust.

[0042] In some embodiments, the housing 100 has an air inlet 140 and an air outlet 150. The air inlet 140 connects to the first chamber 110, and the air outlet 150 connects to the second chamber 120. Air from the workshop enters the first chamber 110 through the air inlet 140, and the air filtered by the filter element 210 reaches the second chamber 120. The air in the second chamber 120 is finally discharged through the air outlet 150.

[0043] Based on the above embodiments, in some embodiments, the fan 310 is embedded in the air inlet 140, and the air inlet end of the fan 310 is equipped with a protective cover 320. The fan 310 draws in air from the workshop, allowing the air to be introduced into the first chamber 110 through the air inlet 140. The protective cover 320 protects the fan 310, while allowing airflow to pass through, ensuring that the protective cover 320 does not obstruct airflow from entering the air inlet 140.

[0044] To better understand this utility model, the following is combined with... Figures 1 to 2 The technical solution of this utility model is described in detail below:

[0045] Because the air inlet surface of the filter element 210 faces the air outlet of the fan 310, the airflow from the fan 310 can directly impact the filter element 210, allowing the airflow to pass through quickly and improving its filtration efficiency. Since the filter elements 210 have spaced-apart screens 212, the airflow passes through each screen sequentially, effectively removing dust. The motor 222 drives the cam 221 to rotate. When the large end of the cam 221 presses against the bottom of the filter element 210, it overcomes the weight of the filter element 210, causing it to move upwards. When the small end of the cam 221 presses against the bottom of the filter element 210, the filter element 210 falls under gravity. This reciprocating motion causes the screens 212 of the filter element 210 to vibrate back and forth. This causes dust accumulated on filter screen 212 to fall off, preventing filter screen 212 from being clogged. Air is drawn into the workshop by fan 310 and directed to the first chamber 110. After passing through filter element 210, the airflow enters the second chamber 120. Since filter element 210 can filter out dust in the airflow, it purifies the air in the workshop. The reciprocating vibration of filter screen 212 prevents excessive dust accumulation. Using this dust explosion-proof device, filter screen 212 can be prevented from clogging, allowing the dust explosion-proof device to be used continuously for extended periods, avoiding frequent shutdowns for cleaning filter screen 212.

[0046] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A dust explosion suppression device, characterized by, include: The housing has a cavity inside; A filter assembly includes a filter element and a drive element. The filter element is slidably built into the housing and divides the accommodating cavity into a first chamber and a second chamber. The filter element can filter out dust in the airflow. The drive element is connected to the filter element to drive the filter element to vibrate. as well as A fan, the air inlet of which is connected to the workshop, and the air outlet of which is connected to the first chamber, so as to introduce air from the workshop into the first chamber.

2. The dust explosion prevention apparatus according to claim 1, characterized by The air inlet surface of the filter faces the air outlet end of the fan, and the filter is slidably housed within the housing along its radial direction.

3. The dust explosion prevention apparatus according to claim 2, characterized by The inner wall of the box is provided with a sliding groove. The filter element includes a support frame and a plurality of filter screens. The support frame is slidably disposed in the sliding groove, and the plurality of filter screens are spaced apart and embedded in the support frame.

4. The dust explosion prevention apparatus according to claim 3, characterized by The bottom of the support frame is provided with a storage groove, which corresponds to the filter screen and is used to collect the dust that falls from the filter screen.

5. The dust explosion prevention apparatus according to claim 4, characterized in that, The support frame has a dust removal port that connects to the storage slot, and the support frame also has a baffle that is detachably installed on the dust removal port.

6. The dust explosion prevention apparatus according to claim 3, wherein The top of the filter screen is tilted towards the air outlet of the fan.

7. The dust explosion prevention apparatus according to claim 1, wherein The driving component includes a cam and a motor. The cam is rotatably mounted on the housing, and the wheel surface of the cam presses against the filter element. The motor is connected to the cam and drives the cam to rotate, thereby causing the filter element to vibrate.

8. The dust explosion-proof device according to claim 7, characterized in that, The filter assembly also includes an elastic element, one end of which is connected to the inner wall of the housing, and the other end of which is connected to the filter element. The elastic element has an elastic force that pushes the filter element away from the inner wall of the housing.

9. The dust explosion prevention apparatus according to claim 8, characterized in that, The filter element has a guide hole, and the elastic element includes a guide rod and a spring. One end of the guide rod is connected to the housing, and the other end passes through the guide hole. The spring is sleeved on the guide rod, with one end of the spring pressing against the housing and the other end pressing against the filter element.

10. The dust explosion prevention apparatus according to claim 1, wherein The housing has an air inlet and an air outlet. The air inlet is connected to the first chamber, and the air outlet is connected to the second chamber.

Images