Extruder feeding dust collection device

Abstract

The utility model relates to the technical field of dust collection of feeding ports, in particular to a feeding dust collection device of an extruder, which comprises a telescopic protection unit, the upper portion of the telescopic protection unit is sleeved on the outer side wall of a matched feeding pipe, and the bottom of the telescopic protection unit is sleeved on the outer side of the upper portion of a feeding bin of the extruder below the telescopic protection unit. A horizontal hanging seat is fixedly mounted on the outer side wall of the upper portion of the telescopic protection unit, the two ends of the horizontal hanging seat are fixedly arranged, dust collection units are symmetrically arranged on the two sides of the outer side wall of the middle of the telescopic protection unit correspondingly, and the tail ends of the dust collection units are connected with external collection equipment through pipelines. And a cleaning unit is mounted at the bottom of the telescopic protection unit. A protection structure is formed through the telescopic protection units, flying dust generated in the particle raw material falling process can be prevented from diffusing outwards, and the external environment is effectively kept clean.

Description

Technical Field

[0001] This utility model relates to the field of dust collection technology for feed inlets, and in particular to a dust collection device for extruder feeding. Background Technology

[0002] When feeding materials into the extruder, the material is mainly transported to the top of the pipe and then conveyed to the extruder hopper below by spraying at the end of the pipe. When the granular material is poured into the pipe, it will cause a lot of dust, which will not only cause material loss and pollute the working environment, but also pose a threat to the health of the operators.

[0003] A dust-reducing feeding technology solution for an extruder feeding dust prevention mechanism was proposed in Chinese patent with authorization announcement number CN220973269U. It mainly includes an extrusion device and a positioning component. The extrusion device has a feeding hopper for feeding materials. A fixed plate is provided on the feeding hopper. A discharge cylinder is provided on the fixed plate. A cover plate is hinged to the end of the discharge cylinder. The positioning component is provided on the discharge cylinder to fix the end of the material bag so that it is lifted. The discharge cylinder is installed on the fixed plate.

[0004] However, the above structure has the following problems in daily maintenance and use:

[0005] While the fixed connection between the discharge cylinder and the feed hopper reduces dust generation during feeding by creating a closed space, it also necessitates the complete disassembly of the discharge cylinder and related components for cleaning, maintenance, or unclogging the extruder's feed hopper. This process is cumbersome and time-consuming. Furthermore, the fixed connection significantly increases maintenance difficulty and reduces equipment maintenance efficiency, especially when material adheres to the inner wall of the feed hopper or when mechanical failures occur.

[0006] The dust collection function relies on a single fan, which is only installed on the cover plate to absorb dust. This can only achieve preliminary dust collection. After long-term use, dust can easily clog the fan filter or pipes, resulting in a decrease in suction power. Frequent manual disassembly and cleaning are required, which increases maintenance costs and affects the continuity of dust prevention effect.

[0007] Based on this, this utility model designs a novel extruder feeding and dust collection device for the feed inlet of a conveyor belt extruder, in order to better solve the problems existing in the prior art. Utility Model Content

[0008] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: an extruder feeding and dust collection device, comprising a telescopic protective unit, the upper part of which is sleeved on the outer wall of a matching feeding pipe, and the bottom of which is sleeved on the upper outer side of the extruder feed hopper below it. A horizontal hanging seat is fixedly installed on the upper outer wall of the telescopic protective unit, with both ends of the horizontal hanging seat fixedly installed. Dust collection units are symmetrically arranged on both sides of the middle outer wall of the telescopic protective unit, and the ends of the dust collection units are connected to external collection equipment through pipes. A cleaning unit is installed at the bottom of the telescopic protective unit for cleaning the dust on the inner wall of the telescopic protective unit.

[0009] The feed pipe is connected to an external feeding system and is used to output the granular raw material to be used by the extruder.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the telescopic protective unit includes a tapered tube section, a guide riser integrally formed at the top of the tapered tube section, the guide riser sleeved on the outer wall of the vertically arranged feeding pipe, a sleeve section integrally formed and bent at the bottom of the tapered tube section, the opening of the sleeve section sleeved on the upper outer side of the extruder feed hopper, a tapered cavity provided inside the tapered tube section, the tapered cavity used to connect the inside of the feeding pipe with the inside of the extruder feed hopper, lifting members symmetrically arranged on the left and right sides of the tapered tube section, the top of the lifting member fixed to the bottom of the horizontal hanging seat, and the bottom of the lifting member bolted to the top of the sleeve section.

[0011] Based on any of the above technical solutions, a further optimization is made as follows: the lifting component includes a vertically arranged hydraulic cylinder, the top of the cylinder barrel of the hydraulic cylinder is fixed to the bottom of the horizontal hanging seat, the bottom of the piston rod of the hydraulic cylinder is bolted to the top of the sleeve section, and the hydraulic cylinder is connected to an externally matched hydraulic station through an oil circuit.

[0012] Based on any of the above technical solutions, a further optimization is made: the two hydraulic cylinders are in a synchronous extension and retraction state during operation.

[0013] Based on any of the above technical solutions, a further optimization is made as follows: the dust collection unit includes a negative pressure fan fixedly installed on the top of the horizontal hanging base, the suction port of the negative pressure fan is connected to a negative pressure bend through a tee, the lower end of each negative pressure bend is fixed on the upper outer wall of the conical tube, the interior of each negative pressure bend is connected to the interior of the conical cavity, and the outlet end of each negative pressure fan is connected to an external collection device through a pipeline.

[0014] Based on any of the above technical solutions, a further optimization is made: the lower part of the tapered tube is a corrugated tube structure and can be folded or unfolded under the lifting action of the two hydraulic cylinders.

[0015] Based on any of the above technical solutions, a further optimization is made as follows: the cleaning unit includes several pneumatic nozzles that are evenly spaced and fixedly arranged along the inner circumference of the sleeve section. The air outlet end of each pneumatic nozzle is vertically arranged towards the inside of the conical cavity, and each pneumatic nozzle is connected to an external air pump system through a matching air pipe.

[0016] Based on any of the above technical solutions, a further optimization is made as follows: a number of sealing rings are fixedly installed from top to bottom on the inner wall of the guide riser, and each sealing ring is used to movably fit onto the outer wall of the feeding pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model forms a double sealing structure by combining a telescopic protective unit with a sealing ring, which can prevent dust generated during the falling of granular raw materials from spreading outward and effectively maintain the cleanliness of the external environment.

[0019] 2. The dust collection unit of this utility model adopts a negative pressure fan and symmetrically arranged negative pressure bends, which are close to the dust source of the conical cavity, shorten the adsorption path, and can adsorb the dust generated during the feeding process in real time and efficiently, reducing the probability of dust accumulation on the inner wall.

[0020] 3. The cleaning unit of this utility model uses pneumatic nozzles evenly distributed around the circumference to spray compressed air to impact the dust on the inner wall. Combined with the negative pressure fan for synchronous adsorption, it can quickly remove the dust accumulated on the inner wall of the telescopic protective unit, avoid secondary dust generation, and maintain the cleanliness of the device. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0023] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0024] Figure 3 This is a side view of the structure of this utility model.

[0025] Figure 4 This is a partial internal structural diagram of the conical cavity of this utility model.

[0026] In the diagram, 1. Feed pipe; 2. Extruder feed hopper; 3. Horizontal hanger; 4. Conical tube section; 5. Guide riser; 6. Sleeve section; 7. Conical cavity; 8. Hydraulic cylinder; 9. Negative pressure fan; 10. Negative pressure bend; 11. Corrugated pipe structure; 12. Pneumatic nozzle; 13. Sealing ring. Detailed Implementation

[0027] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0028] Example 1: An extruder feeding dust collection device includes a telescopic protective unit. The upper part of the telescopic protective unit is sleeved on the outer wall of a matching feeding pipe 1, and the bottom of the telescopic protective unit is sleeved on the upper outer side of the extruder feed hopper 2 below it. A horizontal hanging seat 3 is fixedly installed on the upper outer wall of the telescopic protective unit, with both ends of the horizontal hanging seat 3 fixedly installed. Dust collection units are symmetrically arranged on both sides of the middle outer wall of the telescopic protective unit. The ends of the dust collection units are connected to external collection equipment through pipes. A cleaning unit is installed at the bottom of the telescopic protective unit for cleaning the dust on the inner wall of the telescopic protective unit.

[0029] The extruder feeding and dust collection device is connected to the outer wall of the feeding pipe 1 and the upper outer side of the extruder feed hopper 2 via a telescopic protective unit, forming a closed channel. A horizontal hanging base 3 fixes the upper part of the telescopic protective unit. The dust collection unit is connected to an external collection device via pipeline, utilizing negative pressure to adsorb dust. A cleaning unit is installed at the bottom to clean dust from the inner wall of the telescopic protective unit. During operation, granular raw materials fall through the feeding pipe 1, and dust is blocked by the telescopic protective unit. The collection unit and cleaning unit work together to maintain internal cleanliness.

[0030] Feed pipe 1 is connected to an external feeding system and is used to output granular raw materials for use in the extruder.

[0031] After installation, the device begins normal operation. The granular raw material from the feeding system is continuously conveyed downward through the feeding pipe 1. Under the action of gravity, the granular raw material falls into the extruder feed hopper 2. During the falling process, the telescopic protective unit can prevent the dust caused by the falling granules from spreading outward, thus maintaining the cleanliness of the external environment.

[0032] After prolonged use, a significant amount of dust will accumulate on the inner wall of the telescopic protective unit. Regularly activating the cleaning unit will quickly clean the dust from the inner wall of the telescopic protective unit. Simultaneously activating the dust collection unit during the dust cleaning process will rapidly absorb most of the dust under negative pressure and collect it outwards.

[0033] In addition, the dust collection unit can be activated during normal feeding to quickly collect dust and reduce the probability of dust accumulating on the inner wall of the telescopic protective unit.

[0034] When it is necessary to inspect or maintain the internal structure of the extruder's feed hopper, the lower part of the telescopic protective unit is lifted upward by controlling the two lifting components to remove it from the top of the extruder feed hopper 2, thereby exposing sufficient maintenance space at the top of the extruder feed hopper 2.

[0035] Based on any of the above technical solutions, a further optimization is made as follows: the telescopic protective unit includes a tapered tube section 4, a guide riser 5 integrally formed at the top of the tapered tube section 4, the guide riser 5 being sleeved on the outer wall of the vertically arranged feeding pipe 1, a sleeve section 6 integrally formed and bent at the bottom of the tapered tube section 4, the opening of the sleeve section 6 being sleeved on the upper outer side of the extruder feed hopper 2, a tapered cavity 7 being provided inside the tapered tube section 4, the tapered cavity 7 being used to connect the interior of the feeding pipe 1 with the interior of the extruder feed hopper 2, lifting members being symmetrically arranged on the left and right sides of the tapered tube section 4, the top of the lifting member being fixed to the bottom of the horizontal hanging seat 3, and the bottom of the lifting member being bolted to the top of the sleeve section 6.

[0036] The top of the guide riser 5 is sleeved with the outer wall of the feed pipe 1 to form a raw material inlet. Its vertical structure ensures that the raw material falls vertically. The conical cavity 7 inside the conical tube section 4 has a structure that is narrow at the top and wide at the bottom. It connects the guide riser 5 and the sleeve section 6, and uses the conical surface to guide the raw material to slide smoothly into the extruder feed hopper 2. The bottom of the sleeve section 6 is sleeved with the upper outer side of the feed hopper to form a sealed interface.

[0037] In addition, the lifting component connects the horizontal hanging seat 3 and the sleeve section 6. By lifting up and down, the sleeve section 6 can be raised and lowered to realize the expansion (normal working state) or folding (maintenance state) of the telescopic protective unit.

[0038] Based on any of the above technical solutions, a further optimization is made as follows: the lifting component includes a vertically arranged hydraulic cylinder 8, the top of the cylinder barrel of the hydraulic cylinder 8 is fixed to the bottom of the horizontal hanging seat 3, the bottom of the piston rod of the hydraulic cylinder 8 is bolted to the top of the sleeve section 6, and the hydraulic cylinder 8 is connected to an externally matched hydraulic station through an oil circuit.

[0039] An external hydraulic station supplies oil to the hydraulic cylinder 8 through an oil circuit, driving the piston rod to extend and retract, thereby moving the sleeve section 6 up and down to realize the unfolding or folding of the telescopic protective unit.

[0040] Based on any of the above technical solutions, a further optimization is made: the two hydraulic cylinders 8 are in a synchronous extension and retraction state during operation.

[0041] By controlling the synchronization valve of the hydraulic station, the piston rods of the hydraulic cylinders 8 on both sides are ensured to extend and retract at the same speed and stroke, so that the sleeve section 6 maintains a horizontal posture during the lifting and lowering process, avoiding tilting or jamming caused by uneven force on both sides.

[0042] Based on any of the above technical solutions, a further optimization is made as follows: the dust collection unit includes a negative pressure fan 9 fixedly installed on the top of the horizontal hanging base 3. The suction port of the negative pressure fan 9 is connected to a negative pressure bend 10 through a tee. The lower end of each negative pressure bend 10 is fixed on the upper outer wall of the conical tube section 4. The interior of each negative pressure bend 10 is connected to the interior of the conical cavity 7. The outlet end of each negative pressure fan 9 is connected to an external collection device through a pipeline.

[0043] The dust collection unit generates suction through the negative pressure fan 9, and the negative pressure bend 10 connected by a three-way valve sucks the dust in the conical cavity 7 into the external collection device. Since the negative pressure fan 9 acts directly on the upper part of the conical cavity 7, close to the dust source, the adsorption path is shortened and the collection efficiency is improved. In addition, the negative pressure bends 10 on both sides are symmetrically arranged to cover the entire cross section of the conical cavity 7, avoiding blind spots in dust collection on one side.

[0044] Example 2: Compared with Example 1, this example also includes the following technical features:

[0045] Based on any of the above technical solutions, a further optimization is made: the lower part of the tapered tube section 4 is a corrugated tube structure 11 and can be folded or unfolded under the lifting action of the two hydraulic cylinders 8.

[0046] The lower part of the tapered tube section 4 adopts a corrugated tube structure 11. Utilizing the elastic deformation capability of the corrugated flexible material, when the hydraulic cylinder 8 lifts the sleeve section 6, the corrugated tube can fold or unfold as the sleeve section 6 moves up and down, thereby changing the overall height of the tapered tube section 4.

[0047] Two hydraulic cylinders 8 synchronously extend and retract to drive the sleeve section 6 to rise and fall. The bellows structure 11 adapts to this movement through deformation, maintaining the connectivity of the conical cavity 7.

[0048] Based on any of the above technical solutions, a further optimization is made as follows: the cleaning unit includes a number of pneumatic nozzles 12 that are evenly spaced and fixedly arranged along the inner circumference of the sleeve section 6. The air outlet end of each pneumatic nozzle 12 is vertically arranged towards the inside of the conical cavity 7, and each pneumatic nozzle 12 is connected to an external air pump system through a matching air pipe.

[0049] The cleaning unit removes dust through pneumatic nozzles 12 evenly distributed around the circumference: several pneumatic nozzles 12 are fixed at even intervals around the inner wall of the sleeve section 6, with the air outlets pointing vertically toward the inside of the conical cavity 7, forming a spray range without dead angles.

[0050] The external air pump system delivers compressed air to the pneumatic nozzle 12 through an air pipe. The high-speed airflow impacts the dust adhering to the inner wall of the telescopic protective unit, causing it to fall off and suspend, making it easy to collect under negative pressure.

[0051] Based on any of the above technical solutions, a further optimization is made as follows: a plurality of sealing rings 13 are fixedly installed from top to bottom on the inner wall of the guide riser 5, and each sealing ring 13 is used to be movably sleeved on the outer wall of the feeding pipe 1.

[0052] Several sealing rings 13 are fixedly installed from top to bottom on the inner wall of the guide riser 5. The inner diameter of the sealing ring 13 is adapted to the outer diameter of the feeding pipe 1 and is movably sleeved on the outer wall of the feeding pipe 1. When the feeding pipe 1 conveys raw materials, the sealing ring 13 is tightly attached to the pipe wall through elastic deformation, forming a multi-layer sealing barrier to prevent dust from leaking outward from the gap between the guide riser 5 and the feeding pipe 1.

[0053] Specific work process:

[0054] 1. Normal feeding and dust control stage:

[0055] Raw material conveying: The feeding pipe 1 is connected to the external feeding system to convey the granular raw material downward into the telescopic protective unit. Under the action of gravity, the granular raw material enters the conical cavity 7 of the conical tube section 4 through the guide riser 5, and falls into the extruder feed bin 2 through the sleeve section 6.

[0056] Dustproof sealing: The guide riser 5 of the telescopic protective unit is sleeved to the outer wall of the feeding pipe 1, and the sleeve section 6 is sleeved to the upper outer side of the feeding hopper, forming a physical closed channel to prevent dust from spreading outward.

[0057] The multi-layer sealing ring 13 inside the guide riser 5 is tightly attached to the outer wall of the feed pipe 1, further enhancing the sealing at the interface and preventing dust leakage.

[0058] Dust collection: The negative pressure fan 9 generates negative pressure in the upper part of the conical cavity 7 through the negative pressure bend 10, which adsorbs the dust generated during the feeding process in real time, reducing the accumulation of dust on the inner wall of the telescopic protective unit.

[0059] Dust is transported through pipelines to external collection equipment, achieving closed-loop dust collection.

[0060] 2. Regular cleaning phase:

[0061] Dust removal from the inner wall: When dust accumulates on the inner wall of the telescopic protective unit, the pneumatic nozzle 12 of the cleaning unit is activated, and compressed air is evenly sprayed from the inner circumference of the sleeve section 6 into the conical cavity 7, impacting the dust on the inner wall and causing it to fall off.

[0062] Synchronous collection: During the cleaning process, the negative pressure fan 9 runs synchronously to absorb and discharge the loose dust through the negative pressure bend 10, thus avoiding secondary dust generation.

[0063] 3. Inspection and maintenance phase:

[0064] Lifting and lowering of telescopic protective unit: When the feed hopper needs to be inspected, control the hydraulic cylinders 8 on both sides to lift the sleeve section 6 upwards simultaneously (the corrugated pipe structure 11 at the bottom of the tapered pipe section 4 will fold accordingly), so that the lower part of the telescopic protective unit is removed from the top of the feed hopper, exposing sufficient maintenance space.

[0065] Reset operation: After maintenance is completed, hydraulic cylinder 8 drives sleeve section 6 to descend, bellows structure 11 unfolds, telescopic protection unit re-attaches to feed hopper, and restores the closed state.

[0066] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0067] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A dust collection device for feeding an extruder, characterized in that: The device includes a telescopic protective unit, the upper part of which is fitted onto the outer wall of a matching feeding pipe, and the bottom of which is fitted onto the upper outer side of the extruder feed hopper below it. A horizontal hanging seat is fixedly installed on the upper outer wall of the telescopic protective unit, with both ends of the horizontal hanging seat fixedly installed. Dust collection units are symmetrically arranged on both sides of the middle outer wall of the telescopic protective unit, and the ends of the dust collection units are connected to external collection equipment through pipelines. A cleaning unit is installed at the bottom of the telescopic protective unit for cleaning the dust on the inner wall of the telescopic protective unit.

2. The extruder feeding and dust collection device according to claim 1, characterized in that: The telescopic protective unit includes a tapered tube section. A guide riser is integrally formed at the top of the tapered tube section and is sleeved on the outer wall of the vertically arranged feeding pipe. A sleeve section is integrally formed and bent at the bottom of the tapered tube section. The opening of the sleeve section is sleeved on the upper outer side of the extruder feed hopper. A tapered cavity is provided inside the tapered tube section to connect the inside of the feeding pipe with the inside of the extruder feed hopper. Lifting members are symmetrically arranged on the left and right sides of the tapered tube section. The top of the lifting member is fixed to the bottom of the horizontal hanging base, and the bottom of the lifting member is bolted to the top of the sleeve section.

3. The extruder feeding and dust collection device according to claim 2, characterized in that: The lifting component includes a vertically arranged hydraulic cylinder. The top of the cylinder barrel is fixed to the bottom of the horizontal hanging base, and the bottom of the piston rod of the hydraulic cylinder is bolted to the top of the sleeve section. The hydraulic cylinder is connected to an external hydraulic station through an oil circuit.

4. The extruder feeding and dust collection device according to claim 3, characterized in that: The two hydraulic cylinders are in a synchronous extension and retraction state during operation.

5. The extruder feeding and dust collection device according to claim 4, characterized in that: The dust collection unit includes a negative pressure fan fixedly installed on the top of the horizontal hanging base. The suction port of the negative pressure fan is connected to a negative pressure bend through a tee. The lower end of each negative pressure bend is fixed on the upper outer wall of the conical tube. The interior of each negative pressure bend is connected to the interior of the conical cavity. The outlet end of each negative pressure fan is connected to an external collection device through a pipeline.

6. The extruder feeding and dust collection device according to claim 5, characterized in that: The lower part of the tapered tube is a corrugated tube structure and can be folded or unfolded under the lifting action of the two hydraulic cylinders.

7. The extruder feeding and dust collection device according to claim 6, characterized in that: The cleaning unit includes several pneumatic nozzles that are evenly spaced and fixedly arranged along the inner circumference of the sleeve section. The air outlet of each pneumatic nozzle is vertically oriented towards the inside of the conical cavity, and each pneumatic nozzle is connected to an external air pump system through a matching air pipe.

8. The extruder feeding and dust collection device according to claim 7, characterized in that: Several sealing rings are fixedly installed on the inner wall of the guide riser from top to bottom, and each sealing ring is used to be movably fitted onto the outer wall of the feeding pipe.

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