Search

CN-122008518-A - Extruder of large-caliber steel skeleton composite pipe production line

CN122008518ACN 122008518 ACN122008518 ACN 122008518ACN-122008518-A

Abstract

The invention discloses an extruder of a large-caliber steel skeleton composite pipe production line, which is characterized in that when plastic particles are conveyed into a hopper, a feed inlet is closed through an opening and closing mechanism, a negative pressure dust remover is opened, dust in the plastic particles can be sucked in a negative pressure manner in the process of conveying the plastic particles into a buffer bin, flowing air carries the dust to enter the negative pressure dust remover along an annular metal filter plate, an annular negative pressure box and an annular negative pressure pipe for filtering, so that dust in the plastic particles (which can be raised in the process of entering the buffer bin) is sucked in a negative pressure manner, after the dust in the buffer bin is sucked in a negative pressure manner, the feed inlet is opened through the opening and closing mechanism, so that the plastic particles enter the hopper, and finally, the dust in the plastic particles in the buffer bin are sucked in a negative pressure manner in batches, so that the dust removing effect can be improved, and the dust in the plastic particles can be separated in a high-efficient manner.

Inventors

  • YUAN BEI
  • XIONG XUESHI
  • XIONG FEIXIANG
  • LIU WENJUN
  • DAN MEIYU

Assignees

  • 湖北兴欣科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (9)

  1. 1. The extruder of the large-caliber steel skeleton composite pipe production line comprises an extruder body (1) and a hopper (2) arranged on the extruder body (1), and is characterized in that a feed inlet (21) is arranged at the top of the hopper (2), a buffer bin (3) is arranged on the feed inlet (21), first ventilation holes (31) are formed in a circumferential array on the periphery of the buffer bin (3), a dust removing device (4) for realizing negative pressure dust removal on the periphery of the buffer bin (3) is arranged at the top of the hopper (2), an opening and closing mechanism (5) for opening or closing the feed inlet (21) is arranged at the top of the hopper (2), the dust removing device (4) comprises an annular negative pressure box (41) sleeved on the periphery of the buffer bin (3), an annular metal filter plate (42) arranged on the inner ring of the annular negative pressure box (41) and corresponding to the first ventilation holes (31), an annular negative pressure pipe (43) arranged at the top of the hopper (2), a negative pressure mechanism (44) which is arranged between the annular negative pressure box (41) and the annular negative pressure pipe (43) and can be detached, and the annular negative pressure pipe (43) is communicated with dust removing particles and is prevented from being sucked by the annular filter plate (42).
  2. 2. The extruder of the large-caliber steel skeleton composite pipe production line according to claim 1, wherein an annular hole (411) is formed in an inner ring of the annular negative pressure box (41), annular clamping grooves (412) are formed in the upper end and the lower end of the inner ring of the annular negative pressure box (41), annular rubber rings (421) are wrapped and arranged on the edges of the upper end and the lower end of the annular metal filter plate (42), the outer sides of the annular rubber rings (421) are embedded in the annular clamping grooves (412) in the installation process, and the inner sides of the annular rubber rings (421) are abutted against the periphery of the cache bin (3).
  3. 3. The extruder of a large-caliber steel skeleton composite pipe production line according to claim 1, wherein the communication mechanism (44) comprises a plurality of bearing seats (441) communicated with the annular negative pressure pipe (43) and extending to the upper surface of the hopper (2), and a plurality of inserting pipes (442) arranged at the bottom of the annular negative pressure box (41) and inserted into the bearing seats (441), two sealing rings (4421) for realizing sealing in the process of being inserted into the bearing seats (441) are embedded in the periphery of the inserting pipes (442), and the bearing seats (441) and the top of the hopper (2) are fixedly arranged.
  4. 4. The extruder of the large-caliber steel skeleton composite pipe production line according to claim 1, wherein the opening and closing mechanism (5) comprises a flip (51) hinged in the hopper (2), a driving cylinder (52) arranged on the side surface of the hopper (2) and with a piston rod extending into the hopper (2), and a linkage arm (53) hinged between the piston rod of the driving cylinder (52) and the flip (51), and the flip (51) can open or close the feed inlet (21) under the driving action of the driving cylinder (52).
  5. 5. The extruder of a large-caliber steel skeleton composite pipe production line according to claim 1, wherein the opening and closing mechanism (5) comprises a plurality of fixed shafts (54) which are arranged in the hopper (2) and surround the feed inlet (21), a cover plate (55) which is arranged on the plurality of fixed shafts (54) in a telescopic manner, a plurality of compression springs (56) which are respectively sleeved on one ends of the plurality of fixed shafts (54) penetrating through the cover plate (55), a plurality of anti-falling end covers (57) which are arranged at the lower ends of the plurality of fixed shafts (54) and prevent the compression springs (56) from falling off, and when a set amount of plastic particles are accumulated in the buffer bin (3), the plurality of compression springs (56) drive the cover plate (55) to keep a state of closing the feed inlet (21); The annular negative pressure pipe (43) is integrally arranged with the upper surface of the hopper (2), the upper surface of the hopper (2) is provided with a plurality of first connecting holes (22) communicated with the annular negative pressure pipe (43), the lower surface of the annular negative pressure pipe (43) is provided with a plurality of second connecting holes (431) corresponding to the first connecting holes (22), the communicating mechanism (44) comprises a first rubber sealing sleeve (443) arranged at the first connecting holes (22), a second rubber sealing sleeve (444) arranged at the second connecting holes (431), a communicating pipe (445) with one end stretching into the annular negative pressure box (41) and the other end penetrating into the annular negative pressure pipe (43), a flexible sealing assembly (446) arranged between the upper end of the communicating pipe (445) and the annular negative pressure box (41) and not affecting the lifting of the communicating pipe (445), an annular connecting plate (447) arranged between the plurality of communicating pipes (445), and a lifting assembly (447) arranged between the annular negative pressure box (41) and the annular connecting plate (447) and driving the annular connecting plate (447) to lift, and one side of the communicating pipe (445) close to the inner wall (2) is provided with a communicating port (448); A plurality of groups of first ventilation holes (31) of the cache bin (3) are distributed in a vertical direction, the annular connecting plate (447) is provided with an annular part (4471) which is in contact with the peripheral side of the annular metal filter plate (42), and a plurality of groups of second ventilation holes (4472) which are used for corresponding to or staggering the plurality of groups of first ventilation holes (31) are arranged on the annular part (4471); When the communicating pipe (445) moves upwards to a limit state, a communicating port (4451) of the communicating pipe (445) is positioned in the annular negative pressure pipe (43), the lower surface of the communicating pipe (445) is flush with the lower surface of the second rubber sealing sleeve (444), a plurality of groups of first vent holes (31) correspond to a plurality of groups of second vent holes, and when the communicating pipe (445) moves downwards to the limit state, half of the communicating port (4451) of the communicating pipe (445) is positioned in the annular negative pressure pipe (43) and the other half of the communicating port is positioned outside the annular negative pressure pipe (43), and a plurality of groups of first vent holes (31) and a plurality of groups of second vent holes (4472) are staggered.
  6. 6. The extruder of a large-caliber steel skeleton composite pipe production line according to claim 5, wherein an annular end (4452) is arranged at the upper end of the communicating pipe (445), and the flexible sealing assembly (446) comprises a telescopic corrugated pipe (4461), a first connecting ring (4462) which is arranged at the upper end of the telescopic corrugated pipe (4461) and connected with the annular end (4452), and a second connecting ring (4463) which is arranged at the lower end of the telescopic corrugated pipe (4461) and connected with the annular negative pressure box (41).
  7. 7. The extruder for the large-caliber steel skeleton composite tube production line of claim 5, wherein the top of the annular negative pressure box (41) is detachably connected with an end cover (413) through bolts, and the lifting assembly (448) comprises a lifting cylinder (4481) arranged on the end cover (413), and a connecting joint (4482) arranged between a piston rod of the lifting cylinder (4481) and the annular connecting plate (447).
  8. 8. The extruder of the large-caliber steel skeleton composite pipe production line according to claim 5, wherein the upper surface of the cover plate (55) is provided with a protruding part (551) extending into the buffer bin (3), and the outer diameter of the protruding part (551) is gradually reduced along the vertical downward direction.
  9. 9. The extruder for the large-caliber steel skeleton composite pipe production line according to claim 5, wherein the operation process of negative pressure suction of dust in plastic particles comprises the following steps of: (S1) in a state that a feed inlet (21) is closed by a cover plate (55), plastic particles are quantitatively conveyed into a buffer bin (3) through an external automatic feeding system; (S2) in the process that plastic particles enter the cache bin (3), opening a negative pressure dust remover (45), and enabling air to flow along the cache bin (3), the annular metal filter plate (42), the annular negative pressure box (41), the communicating pipe (445) and the annular negative pressure pipe (43) and then enter the negative pressure dust remover (45) so as to realize negative pressure suction on dust in the plastic particles in the cache bin (3); (S3) the lifting assembly (448) drives the communicating pipe (445) to move downwards to a limit state, and the communicating pipe (445) overcomes the elasticity of the compression spring (56) so that the cover plate (55) opens the feed inlet (21), and plastic particles flow into the hopper (2); (S4) in the process that plastic particles flow into the hopper (2), half of the communication ports (4451) of the communicating pipes (445) are positioned in the annular negative pressure pipe (43) and the other half of the communication ports are positioned outside the annular negative pressure pipe (43), the first vent holes (31) of the plurality of groups are staggered with the second vent holes (4472), and air enters the negative pressure dust remover (45) along the top of the hopper (2), the communication ports (4451) of the communicating pipes (445) and the annular negative pressure pipe (43) so as to realize negative pressure suction of dust on the top of the hopper (2); (S5) the lifting assembly (448) drives the cover plate (55) to move upwards to a limit state, so that the cover plate (55) is in a state of closing the feed inlet (21); And (S6) repeating the steps (S1) to (S5) so that the plastic particles are quantitatively and repeatedly subjected to negative pressure dust removal and then conveyed into the hopper (2), and the effect of each negative pressure dust removal is improved.

Description

Extruder of large-caliber steel skeleton composite pipe production line Technical Field The invention relates to the technical field of plastic extrusion molding equipment, in particular to an extruder of a large-caliber steel skeleton composite pipe production line. Background The large-caliber steel skeleton composite pipe production line is mainly used for producing steel-plastic composite structure pipes, and structurally comprises a polyethylene inner layer, a steel skeleton middle layer and a polyethylene outer layer, has the high strength of steel and the corrosion resistance of plastics, is suitable for the fields of municipal engineering, energy transportation, chemical industry and the like, and especially meets the requirements of high-pressure and high-flow fluid transportation. The extruder is core equipment of a production line and is responsible for extruding polyethylene plastic particles after melting and plasticizing, and the polyethylene plastic particles and the steel wire framework are compounded to form a pipe body structure, so that the strength, uniformity and production efficiency of the pipe are directly affected. However, dust entrained in plastic particles is difficult to completely disperse in the melting process of the dust particles, and local concentration gradient is easy to form, so that the melt flow is unstable, and further the defects of uneven wall thickness, rough inner wall, obvious seam line and the like of the pipe are caused. When plasticization is poor, the surface of the melt can be in a 'toad skin' -shaped texture, and the pressure-bearing performance of the pipe is affected. Therefore, it is necessary to design an extruder capable of separating dust from plastic particles. Disclosure of Invention The invention aims to provide an extruder for a large-caliber steel skeleton composite pipe production line, which can realize the separation of dust in plastic particles. The technical aim of the invention is achieved by the following technical scheme that the extruder of the large-caliber steel skeleton composite pipe production line comprises an extruder body and a hopper arranged on the extruder body, and is characterized in that the top of the hopper is provided with a feed inlet, a buffering bin is arranged on the feed inlet, a first vent hole is arranged on the circumferential array of the circumference of the buffering bin, and a dust removing device for realizing negative pressure dust removal on the circumference of the buffering bin is arranged at the top of the hopper; the top of the hopper is provided with an opening and closing mechanism for opening or closing the feed inlet; The dust removing device comprises an annular negative pressure box sleeved on the periphery of the cache bin, an annular metal filter plate arranged on the inner ring of the annular negative pressure box and corresponding to the first vent hole, an annular negative pressure pipe arranged at the top of the hopper, a detachable communication mechanism arranged between the annular negative pressure box and the annular negative pressure pipe, and a negative pressure dust remover communicated with the annular negative pressure pipe, wherein the annular metal filter plate is used for preventing plastic particles from being sucked and dust from being sucked. According to the technical scheme, when plastic particles are conveyed into the hopper, the feed inlet is closed through the opening and closing mechanism, the negative pressure dust remover is opened, negative pressure suction can be carried out on dust in the plastic particles in the process of conveying the plastic particles into the buffer bin, flowing air carries the dust to enter the negative pressure dust remover along the annular metal filter plate, the annular negative pressure box and the annular negative pressure pipe for filtering, so that negative pressure suction collection is carried out on dust in the plastic particles (the plastic particles can be lifted in the process of entering the buffer bin), after the negative pressure suction collection is carried out on the dust in the buffer bin, the feed inlet is opened through the opening and closing mechanism, so that the plastic particles enter the hopper, finally, the negative pressure suction collection is carried out on the dust in the plastic particles in the buffer bin in batches, the dust removal effect can be improved, the efficient separation of the dust in the plastic particles is realized, meanwhile, the annular metal filter plate needs to be cleaned in the long-time use process, and the annular negative pressure box is detachably arranged in combination with the annular negative pressure box for detaching the annular filter plate, so that the annular metal filter plate can be detached, and the cleaning is realized. The annular negative pressure box is characterized in that an annular hole is formed in the inner ring of the annular negative pressure box, annular