A ton bag throwing and unloading dustproof device in combination

Abstract

The application discloses a ton bag throwing and discharging dustproof device used in combination, which comprises a ton bag (2), a ton bag push-pull cutting device, and a conical chute (10) in which the lower part of the ton bag (2) is located. The inner wall of the conical chute (10) is closely attached to the side surface of the ton bag (2). A slit type dust suction port (11) connected with external dust removal equipment is arranged on the upper part of the side wall of the conical chute (10). The ton bag push-pull cutting device comprises a cross-shaped cutting knife (1) used for cutting the bag bottom of the ton bag (2). The ton bag discharging dustproof device comprises the ton bag (2) installed at the lower part of a stock bin (19). A rectangular air pipe (13) is arranged around the discharging port of the stock bin (19). An air outlet (14) capable of covering the upper part of the ton bag (2) is arranged on the rectangular air pipe (13). The application can significantly reduce dust overflow, reduce the concentration of unorganized dust emission in the workshop, and improve the working environment of the operators.

Description

Technical Field

[0001] This invention belongs to the field of dust prevention technology for ton bag feeding and unloading, specifically relating to a ton bag throwing and unloading sealed dust suppression device. Background Technology

[0002] In industrial production, many materials are packaged in ton bags. This packaging method is very convenient for transportation and storage, and it is also low-cost and cost-effective. However, how to deal with the dust from the ton bag throwing and unloading ports has become a major headache for ton bag unloading personnel. The working principle of ton bag throwing is to use mechanical devices such as electric hoists and winches to hook and lift the ton bag above the unloading port of the silo, puncture the bottom of the ton bag, and use gravity, vibration, or pneumatic auxiliary devices to discharge the material to the conveying facilities or storage silo. The working principle of unloading ton bags is to install ton bags at the bottom of the unloading port of the silo and control the opening and closing of the unloading port to unload the ton bags. There is a large drop height difference between the throwing and unloading of ton bags, which easily generates secondary dust during the unloading process. At the same time, due to the lack of airtightness, the spilled material can easily accumulate on the ground, causing the concentration of fugitive dust inside the plant to seriously exceed the standard, and deteriorating the working environment of the operators.

[0003] Currently, the most mature method for unloading ton bags involves using an electric hoist to lift the ton bag to the top of the hopper's unloading port, closing the bag's inlet and outlet to create a sealed space before unloading. The accompanying dust collection equipment then operates, creating a slightly negative pressure environment to control dust leakage. However, this unloading equipment has drawbacks such as large structural dimensions, inadequate sealing, high labor intensity for workers, and operational difficulties. Furthermore, the accompanying dust collection equipment is often large in size, making it unsuitable for spaces with limited floor space and compact layouts.

[0004] To address the dust suppression issue of self-unloading ton bags, Chinese utility model patent ZL202322058182.5 discloses a self-unloading ton bag and a dust suppression and ash conveying system suitable for it. The self-unloading ton bag includes: a bag body with lifting straps; a discharge hole at the bottom of the bag body; a discharge conduit at the discharge hole; short and long supports at the bottom of the bag body; hanging ropes on the short and long supports respectively; and locking plates on the left and right sides of the bag body, each with a locking groove and an elastic element within it. Unloading can be achieved automatically without manual intervention. A dust suppression and ash conveying system for ton bags includes an ash conveying system and self-unloading ton bags. The ash conveying system includes a frame, an ash hopper mounted on the frame, a feed hopper and a dust cover on the top of the ash hopper, two dust baffles hinged to the dust cover, a torsion spring between the dust baffles and the dust cover, and semi-circular holes at the ends of the dust baffles. A traveling crane is mounted on the frame. This system can reduce the amount of dust generated when ton bags discharge ash and prevent the dust from overflowing outside. However, overall, some dust still overflows outside when the ton bags discharge ash.

[0005] Therefore, it is essential to develop and design efficient, environmentally friendly, and safe ton bag throwing and unloading sealed dust suppression devices. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a combined ton bag feeding and unloading sealed dust suppression device that is simple in structure, easy to operate, effective, low in operation and maintenance costs, and can significantly control dust overflow during the feeding and unloading process.

[0007] To achieve the above-mentioned objectives of the present invention, the present invention provides a combined ton bag feeding and unloading enclosed dust suppression device using the following technical solution:

[0008] This invention discloses a combined ton bag feeding and unloading enclosed dust suppression device, which is composed of a ton bag feeding enclosed dust suppression device and a ton bag unloading enclosed dust suppression device.

[0009] The aforementioned ton bag throwing and feeding enclosed dust suppression device includes a ton bag and a ton bag push-pull cutting device. The ton bag is hoisted onto a steel guide rail by an electric hoist. The lower part of the ton bag is located in a conical chute, with the inner wall of the conical chute in close contact with the side surface of the ton bag. A "slit" type dust suction port for connection to external dust removal equipment is provided on the upper side wall of the conical chute. A grid filter plate is installed at the lower part of the conical chute, and the lower part of the conical chute is connected to the upper part of the hopper through the grid filter plate. The grid filter plate filters out coarse particles in the bulk material to prevent blockage in the hopper. The ton bag push-pull cutting device includes a cross-shaped cutter for cutting the bottom of the ton bag, and the cross-shaped cutter is located on the bottom side of the ton bag. The ton bag throwing and feeding enclosed dust suppression device reduces the unloading height difference, thereby reducing dust generation. The close contact between the side of the ton bag and the conical chute prevents dust from overflowing, and the micro-negative pressure environment created by the "slit" type suction port reduces secondary dust generation.

[0010] The aforementioned ton bag unloading sealed dust suppression device includes a ton bag installed at the bottom of the silo. The ton bag is supported on a patterned support plate. A flexible duct is installed at the bottom of the silo's unloading port and extends into the ton bag. A manual gate valve is installed at the silo's unloading port. The opening and closing of the manual gate valve can reduce the spillage of loose material when changing ton bags. A rectangular air duct is installed around the silo's unloading port. A positive pressure fan is connected to the outside of the rectangular air duct. An air curtain is installed on the rectangular air duct to cover the air outlet of the upper feed port of the ton bag.

[0011] Preferably, the ton bag push-pull cutting device further includes a push-pull rod, a guide bracket, a push-pull handle, and a limiting plate. One end of the push-pull rod is connected to a cross-shaped cutter, and the push-pull rod passes through a conical chute and is connected to the push-pull handle at the other end. The push-pull rod located outside the conical chute is supported on the guide bracket, and the limiting plate is set on the push-pull rod between the guide bracket and the push-pull handle. The push-pull rod is fully welded to the cross-shaped cutter. The guide bracket is used to ensure that the push-pull rod always moves along the axial direction, and the limiting plate is used to limit the end position of the push-pull rod's stroke. The operator cuts the bottom of the ton bag by pushing and pulling the cross-shaped cutter to unload the material. At the same time, a "slit" type dust suction port installed at the top of the conical chute creates a micro-negative pressure environment to suppress the dust generated at the end of unloading.

[0012] Preferably, a clustered spring is installed on the lower part of the patterned pallet, and the lower part of the clustered spring is installed and fixed to the base plate of the retarded concrete. In the ton bag unloading closed dust suppression device, the clustered spring at the bottom of the ton bag ensures that the drop height difference is always kept at a low level.

[0013] Preferably, the angle between the outer wall of the conical chute and the horizontal plane is greater than the angle of repose of the material inside the ton bag; the contact length between the inner wall of the conical chute and the surface of the ton bag is 200~400mm.

[0014] Preferably, the angle between the outer wall of the conical chute and the horizontal plane is 60º~75º.

[0015] Preferably, the cross-shaped cutter is welded together from four perpendicularly intersecting arc-shaped blades, with the cutting surface facing the operating surface; the push-pull rod is made of φ12~φ18 threaded steel bars.

[0016] Preferably, the "slit" type dust suction port is installed 500mm~600mm below the top of the conical chute, with circumferential openings around it, the slit width being 200~250mm, and is connected to external dust removal equipment through a rectangular air duct.

[0017] Preferably, two rectangular air ducts are installed around the discharge port of the silo to form two low-pressure air curtains to prevent the flow of air between the inside and outside. A positive pressure fan supplies air at a pressure of 80Pa~120Pa, and the outlet structure is a strip-shaped design. The induced airflow velocity under the ton bag is greater than the dust escape velocity, with a value of 0.6m / s~1.0m / s. The air curtains formed by the two compressed air ducts further prevent the flow of air between the inside and outside, reducing dust leakage.

[0018] Preferably, a flexible conveyor belt is installed at the lower part of the discharge port of the silo. The outer extension of the flexible conveyor belt is 0.8m~1.2m. Every 0.3m~0.5m, a 50mm~80mm wide rigid plastic plate is wrapped around the outer side of the flexible conveyor belt to enhance its strength and stability. The grouped springs are made of helical springs of the same specification, type and size. The elastic coefficient is determined according to the weight of the ton bag and the height of the discharge port of the silo, and the value range is 15kN / m~30kN / m.

[0019] The combined ton bag feeding and unloading enclosed dust suppression device of the present invention, after adopting the above technical solution, has the following beneficial effects:

[0020] (1) The material throwing and sealing dust suppression device reduces the unloading height difference and thus reduces dust generation. The side of the ton bag is closely attached to the conical chute to prevent dust from overflowing. The micro negative pressure environment formed by the "slit" type air intake reduces secondary dust. The guide bracket provided in the ton bag push-pull cutting device is used to ensure that the push-pull rod always moves along the axial direction, and the limiting plate is used to limit the end position of the push-pull rod stroke.

[0021] (2) The lower grouping spring of the ton bag in the unloading sealed dust suppression device ensures that the drop height difference is always kept at a low level, and the air curtain formed by the two compressed airs isolates the internal and external airflows, further reducing dust overflow; a manual gate valve is set on the unloading port of the silo, and the opening and closing of the manual gate valve can reduce the spillage of loose material when changing ton bags.

[0022] (3) By combining the ton bag throwing and unloading dust suppression device and the ton bag unloading dust suppression device, the present invention significantly reduces dust overflow, lowers the concentration of fugitive dust emissions inside the plant, improves the working environment of operators, meets the requirements of national environmental protection policies, and reduces material waste and production costs.

[0023] (4) The relevant technical parameters designed in this invention are reasonable and reliable, and can effectively control the dust overflow during the throwing and unloading process, with significant effect.

[0024] (5) Industrial testing has shown that the equipment of the present invention has a simple structure, reliable operation, convenient operation and maintenance, low failure rate, long service life, good technical and economic efficiency, and low operating cost. Attached Figure Description

[0025] Figure 1 The diagram shows the external structure of the ton bag throwing and feeding closed dust suppression device designed for this invention.

[0026] Figure 2 This is a structural diagram of the sealed dust suppression device for unloading ton bags designed for this invention.

[0027] Attached reference numerals: 1- Cross-shaped cutter; 2- Ton bag; 3- Electric hoist; 4- Steel guide rail; 5- Push-pull rod; 6- Guide bracket; 7- Push-pull handle; 8- Limiting plate; 9- Grille filter plate; 10- Conical chute; 11- Slit-type dust suction port; 12- Manual gate valve; 13- Rectangular air duct; 14- Air outlet; 15- Flexible duct cloth; 16- Patterned support plate; 17- Grouped spring; 18- Retarded concrete base plate; 19- Hopper. Detailed Implementation

[0028] To better describe the present invention, a combined ton bag feeding and unloading enclosed dust suppression device of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The present invention provides a combined dust suppression device for ton bag feeding and unloading, which consists of a ton bag feeding dust suppression device and a ton bag unloading dust suppression device.

[0030] Depend on Figure 1As shown in the external structural diagram of the ton bag throwing and feeding sealed dust suppression device designed in this invention, in the embodiment, the ton bag throwing and feeding sealed dust suppression device designed in this invention includes a ton bag 2 and a ton bag pushing, pulling and cutting device; the ton bag 2 is hoisted on the steel guide rail 4 by an electric hoist 3, the lower part of the ton bag 2 is located in the conical chute 10, the inner wall of the conical chute 10 is in close contact with the side surface of the ton bag 2, the contact length is 200~400mm, the side of the ton bag 2 is in close contact with the conical chute 10 to prevent dust from overflowing; the outer wall of the conical chute 10 is clamped to the horizontal plane. The angle value is greater than the angle of repose of the material contained in the ton bag 2, preferably 60º~75º; a "slit" type dust suction port 11 is provided on the upper side wall of the conical chute 10. The "slit" type dust suction port 11 is installed 500mm~600mm below the top of the conical chute 10, with circumferential openings around it. The slit width is 200~250mm, and it is connected to the external dust removal equipment through a rectangular air duct; a grid filter plate 9 is installed on the lower part of the conical chute 10, and the lower part of the conical chute 10 is connected to the upper part of the hopper 19 through the grid filter plate 9. The ton bag push-pull cutting device consists of a cross-shaped cutter 1, a push-pull rod 5, a guide bracket 6, a push-pull handle 7, and a limiting plate 8. The cross-shaped cutter 1 is located on the bottom side of the ton bag 2 and is used to cut the bottom of the ton bag 2. The cross-shaped cutter 1 is welded together from four perpendicularly intersecting arc-shaped blades, with the cutting surface facing the operating surface. The push-pull rod 5 is made of φ12~φ18 threaded steel bars. One end of the push-pull rod 5 is connected to the cross-shaped cutter 1, and the push-pull rod 5 passes through the conical chute 10 and is connected to the push-pull handle 7 at the other end. The push-pull rod 5 located outside the conical chute 10 is supported on the guide bracket 6, and the limiting plate 8 is set on the push-pull rod 5 between the guide bracket 6 and the push-pull handle 7.

[0031] In practical use, the ton bag throwing and feeding sealed dust suppression device designed in this invention involves the ton bag 2 filled with bulk material being hooked by an electric hoist 3 and moved along the steel guide rail 4 to the upper side of the discharge port. It then slowly descends until the side of the ton bag 2 is in close contact with the conical chute 10. The operator then firmly grips the push-pull handle 7, causing the push-pull rod to reciprocate axially along the guide bracket 6. The cross-shaped cutter 1 cuts open the bottom of the ton bag, and under the action of the material's own gravity, large particles are filtered out by the grid filter plate 9 before falling into the ash hopper 19 for temporary storage. Simultaneously, the supporting dust removal equipment starts operating, creating a slightly negative pressure environment. Overflowing fine dust is sucked through the "slit" type suction port 11 to the surface of the dust removal filter material for collection. Compressed air is used periodically to blow away the dust. The ton bag throwing and feeding sealed dust suppression device designed in this invention reduces the material drop height difference, thereby reducing dust generation. The close contact between the side of the ton bag and the conical chute reduces dust overflow, and the "slit" type suction port creates a slightly negative pressure environment, reducing secondary dust generation.

[0032] Depend on Figure 2As shown in the external structural diagram of the ton bag unloading sealed dust suppression device designed in this invention, in the embodiment, the ton bag unloading sealed dust suppression device designed in this invention includes a ton bag 2 installed at the lower part of the hopper 19. The ton bag 2 is supported on a patterned support plate 16. A flexible duct 15 is installed at the lower part of the unloading port of the hopper 19 and extends outward into the ton bag 2. The extension length of the flexible duct 15 is 0.8m~1.2m. A 50mm~80mm wide rigid plastic plate is wrapped around the outer side of the flexible duct 15 every 0.3m~0.5m. A manual gate valve 12 is provided on the unloading port of the hopper 19. The manual gate valve 12 can reduce the spillage of loose material when changing ton bags. Two rectangular air ducts 13 are installed around the discharge port of the silo 19. Air curtains are installed on the rectangular air ducts 13 to cover the air outlet 14 of the upper feed port of the ton bag 2. A positive pressure fan is connected to the rectangular air ducts 13, forming two low-pressure air curtains to prevent airflow between the inside and outside. The positive pressure fan delivers air at a pressure of 80Pa~120Pa. The air outlet structure is a strip-shaped structure. The induced airflow velocity on the lower side of the ton bag 2 is greater than the dust escape velocity, with a value of 0.6m / s~1.0m / s. A clustered spring 17 is installed on the lower part of the patterned support plate 16. The lower part of the clustered spring 17 is installed and fixed to the concrete base plate 18. The clustered spring 17 is made of helical springs of the same specification, type, and size. The elastic coefficient is determined according to the weight of the ton bag 2 and the height of the discharge port of the silo 19, with a value range of 15kN / m~30kN / m.

[0033] The ton bag unloading closed dust suppression device designed in this invention involves placing the ton bag 2 under the ash discharge port and fully opening the manual gate valve 12 to begin unloading. As the weight of the ton bag 2 increases, the grouped spring 17 is gradually compressed, ensuring that the drop height difference remains at a low level. The discharge port uses a flexible duct cloth 15 with appropriate extension to reduce the material settling speed and impact. The patterned support plate 16 supports the ton bag 2, while the concrete base plate 18 secures the connecting grouped spring 17. Low-pressure air in the rectangular duct 13 is ejected through the slotted air outlet 14, forming two air curtains that isolate the internal and external airflow, further controlling the spillage of fine dust. The grouped spring at the bottom of the ton bag in the ton bag unloading closed dust suppression device designed in this invention ensures that the drop height difference remains at a low level, while the air curtains formed by the two low-pressure airflows isolate the internal and external airflow, further reducing dust spillage. The manual gate valve also reduces material spillage when changing ton bags.

[0034] Industrial trials have demonstrated that the combined ton bag feeding and unloading enclosed dust suppression device provided by this invention can effectively reduce the material drop height difference, prevent dust overflow, and improve the surrounding working environment. It boasts advantages such as simple structure, convenient operation, significant effects, good technical and economic efficiency, and low operating costs. Practical application at a magnetic materials manufacturer in Ma'anshan City, Anhui Province, has shown that the process is reliable, effective, stable in operation, and technically mature.

[0035] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ton bag throwing and unloading dustproof device in combination, characterized in that It is composed of ton bag throwing material closed dust suppression device and ton bag unloading material closed dust suppression device. The ton bag throwing material closed dust suppression device comprises a ton bag (2) and a ton bag push-pull cutting device. The ton bag unloading material closed dust suppression device comprises a ton bag (2) installed at the lower part of a material bin (19).

2. A combination ton bag throwing and discharging dust containment device for use as claimed in claim 1, characterized in that: The ton bag push-pull cutting device further comprises a push-pull rod (5), a guide bracket (6), a push-pull handle (7) and a limiting plate (8).

3. A combination ton bag throw and discharge dust containment device for use as claimed in claim 2, wherein: A group spring (17) is installed at the lower part of the pattern support plate (16) and is fixed on a slow-setting concrete bottom plate (18).

4. A combination ton bag throw and discharge dust containment device as defined in claim 1 wherein: The angle between the outer wall of the conical chute (10) and the horizontal plane is greater than the repose angle of the material in the ton bag (2).

5. A combination ton bag throw and discharge dust containment device as defined in claim 4 wherein: The angle between the outer wall of the conical chute (10) and the horizontal plane is 60º~75º.

6. A combination ton bag throw and discharge dust containment apparatus for use as in claim 2, wherein: The "cross" type cutter (1) is composed of four arc-shaped blades which are perpendicular to each other and are welded together.

7. A combination ton bag throw and discharge dust containment device as defined in claim 1 wherein: The "slit" type dust suction port (11) is installed 500mm~600mm below the top of the conical chute (10) and has a circumferential opening around it. The slit width is 200~250mm and the rectangular air pipe is connected to the external dust removal equipment.

8. A combination ton bag throw and discharge dust containment device as defined in claim 1 wherein: Two rectangular air pipes (13) are arranged around the discharge port of the bin (19) to form two low-pressure air curtains to isolate the internal and external airflow, and a positive pressure fan is used for air supply, with an air supply pressure of 80 Pa to 120 Pa, and a strip gap type air outlet structure, with the induced airflow velocity on the lower side of the ton bag (2) being greater than the escape velocity of the dust, and the value being 0.6 m / s to 1.0 m / s.

9. A combination ton bag throw and discharge dust containment device as defined in claim 3 wherein: A flexible chute (15) is installed at the lower part of the discharge port of the bin (19), the flexible chute (15) has an extended length of 0.8 m to 1.2 m, and a 50 mm to 80 mm wide hard plastic plate is wrapped around the outer side of the flexible chute (15) every 0.3 m to 0.5 m, the grouping spring (17) is made of spiral springs of the same specification, the same type and the same size, and the elastic coefficient value is determined according to the weight of the ton bag (2) and the height of the discharge port of the bin (19), and the value range is 15 kN / m to 30 kN / m.

10. A combination ton bag throw and discharge dust containment apparatus as defined in claim 3 wherein: The angle between the outer wall of the conical chute (10) and the horizontal plane is greater than the angle of repose of the material in the ton bag (2); the contact length between the inner wall of the conical chute (10) and the surface of the ton bag (2) is 200 to 400 mm; the angle between the outer wall of the conical chute (10) and the horizontal plane is 60º to 75º; the "cross" type cutter (1) is welded by four arc-shaped blades intersecting perpendicularly, with the blade surface facing one side of the operating surface; the push-pull rod (5) is made of φ12 to φ18 threaded steel bars; the "slit" type dust suction port (11) is installed 500 mm to 600 mm below the top of the conical chute (10), with a ring-shaped opening around the periphery, a slit width of 200 to 250 mm, and is connected to external dust removal equipment through a rectangular air pipe; two rectangular air pipes (13) are arranged around the discharge port of the bin (19) to form two low-pressure air curtains to isolate the internal and external airflow, and a positive pressure fan is used for air supply, with an air supply pressure of 80 Pa to 120 Pa, and a strip gap type air outlet structure, with the induced airflow velocity on the lower side of the ton bag (2) being greater than the escape velocity of the dust, and the value being 0.6 m / s to 1.0 m / s; a flexible chute (15) is installed at the lower part of the discharge port of the bin (19), the flexible chute (15) has an extended length of 0.8 m to 1.2 m, and a 50 mm to 80 mm wide hard plastic plate is wrapped around the outer side of the flexible chute (15) every 0.3 m to 0.5 m, the grouping spring (17) is made of spiral springs of the same specification, the same type and the same size, and the elastic coefficient value is determined according to the weight of the ton bag (2) and the height of the discharge port of the bin (19), and the value range is 15 kN / m to 30 kN / m.

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