Extruder for CPVC cable conduit production

Abstract

The present invention relates to the technical field of extruders used for production of CPVC cable conduits. Disclosed is an extruder for CPVC cable conduit production. The extruder comprises a screw extruder, an extruder hopper is provided over the screw extruder, a raw material connection pipe is connected to the top end of the extruder hopper, and the other end of the raw material connection pipe is provided with a raw material conveying pump. During the process of processing and mixing raw materials in a raw material tank connected to the extruder, the raw materials at the center and the edge of the raw material tank can be mutually exchanged, thus ensuring that temperatures of the raw materials at the center and the edge of the tank body during the raw material mixing process are kept close, and no temperature difference between the inside and the outside presents.

Description

An extruder for producing CPVC cable pipes Technical Field

[0001] The invention relates to the technical field of CPVC cable pipe extruders, in particular to an extruder for producing CPVC cable pipes. Background Art

[0002] Cable pipe, also known as cable protection pipe, is a metal protection pipe with a certain mechanical strength that is laid on the outer layer of the cable to prevent the cable from being damaged. Cable protection pipe is mainly installed in the area where communication cables and power lines intersect to prevent power lines from breaking and causing short circuit accidents.

[0003] Cable tubing is generally produced using CPVC as raw material. During production, the raw materials are first added to the storage tank of the extruder, then heated and melted, and then extruded through the extruder. Finally, the finished product extruded by the extruder is cooled and shaped to obtain a finished product.

[0004] When processing CPVC cable pipes, the raw materials must first be melted and then extruded into shape through an extruder. However, the raw material tank connected to the extruder is externally heated, and there is a temperature difference between the inside and outside of the raw material tank, which causes defects in the raw materials extruded by the extruder after molding. Therefore, this does not meet existing needs. In response to this, we have proposed an extruder for the production of CPVC cable pipes.

[0005] Summary of the Invention

[0006] The object of the present invention is to provide an extruder for producing CPVC cable pipes, so as to solve the problems raised in the above-mentioned background art, that is, during the processing of CPVC cable pipes, the raw materials need to be melted first and then extruded into shape through an extruder, and the raw material tank connected to the extruder is externally heated, resulting in a temperature difference between the inside and outside of the raw material tank, which causes defects in the raw material extruded by the extruder after molding.

[0007] To achieve the above objectives, the present invention provides the following technical solutions: an extruder for producing CPVC cable tubing, comprising a screw extruder, an extruder storage box disposed above the screw extruder, a connecting material pipe connected to the top end of the extruder storage box, a raw material delivery pump disposed at the other end of the connecting material pipe, a raw material mixing and heating barrel disposed above the raw material delivery pump, the raw material mixing and heating barrel and the raw material delivery pump being connected by a pipeline, and a mixing and stirring mechanism and a raw material internal and external exchange mechanism disposed inside the raw material mixing and heating barrel;

[0008] The mixing and stirring mechanism includes a drive motor, a central rotating shaft, a stirring rod and an L-shaped mixing and stirring blade, wherein the drive motor is located on one side of the top end of the central rotating shaft, the stirring rod is fixed to the outside of the central rotating shaft, the L-shaped mixing and stirring blade is fixed to the outside of the stirring rod, and a plurality of transmission teeth are arranged on the outer surface of the bent end of the L-shaped mixing and stirring blade. The drive motor and the central rotating shaft are transmitted through two meshing gears, and a hanging ring is fixedly provided on the outer side of the top end of the central rotating shaft, and the hanging ring is rotatably clamped in the inner wall of the raw material mixing and heating barrel;

[0009] The raw material internal and external exchange mechanism includes a central vertical rod, a peripheral vertical rod, a rotating exchange impeller and a power connection assembly. The rotating exchange impeller is movably mounted on the central vertical rod and the peripheral vertical rod. When the L-shaped mixing and stirring blade rotates with the stirring rod and the central rotating shaft, it will contact the power connection assembly and operate the power connection assembly. Then the power assembly will drive the rotating exchange impeller to rotate to exchange the positions of the raw materials at the center and edge of the raw material mixing and heating barrel.

[0010] The power connection assembly also includes a first transmission shaft and a second transmission shaft. The first transmission shaft is located inside the outer vertical rod, and the second transmission shaft is located inside the central vertical rod. The outer surfaces of the first transmission shaft and the second transmission shaft are both provided with a plurality of equally spaced transmission pulleys. A transmission belt is sleeved on the outer side of the transmission pulley, and a synchronous pulley is provided on the inner side of the other end of the transmission belt. An impeller shaft is provided through the middle of the synchronous pulley, and the bottom end of the impeller shaft passes through the rotating exchange impeller located below the synchronous pulley.

[0011] Preferably, a reverse synchronous gear is fixedly provided on the outer side of the top end of the second transmission shaft, a supporting shaft is provided through the middle of the reverse synchronous gear, a reverse drive gear is provided on the outer side of the top end of the supporting shaft, and a meshing transmission gear is provided on one side of the reverse drive gear and the outer side of the top end of the first transmission shaft, and the meshing transmission gear is meshed with the transmission teeth on the outer surface of the bent end of the L-shaped mixing blade and the reverse drive gear in contact with the meshing transmission gear.

[0012] Preferably, a sealing ring is embedded in the annular groove, and the outer edge of the sealing ring is clamped in the inner walls of the central vertical rod and the peripheral vertical rod to rotate and rub against the central vertical rod and the peripheral vertical rod.

[0013] Preferably, a positioning shaft is provided through the middle of the meshing transmission gear that is meshed with the reverse drive gear. Both ends of the positioning shaft are inserted into the inner wall of the central vertical rod and ball bearings are provided on the outer side of the end. The upper and lower surfaces of the meshing transmission gear are provided with annular grooves, and the inner side of the annular groove is inlaid with an alloy sealing ring. The alloy sealing ring is clamped in the inner walls of the central vertical rod and the outer vertical rod and is slidably connected to the central vertical rod and the outer vertical rod.

[0014] Preferably, two feeding funnels are provided at the top of the raw material mixing and heating barrel, and a solenoid valve is provided on the inner side of the bottom end of the feeding funnel. Two C-shaped and symmetrical heating plates are provided inside the shell of the raw material mixing and heating barrel, and electric heating wires are provided inside the heating plates, and the electric heating wires are connected to the external power supply through electric wires.

[0015] Preferably, the distance between the bottom end of the central vertical rod and the inner bottom surface of the raw material mixing and heating barrel is greater than five centimeters, and four support columns are arranged between the central vertical rod and the raw material mixing and heating barrel. The top ends of the four support columns are fixed to the bottom of the central vertical rod by welding, and four positioning holes are provided on the inner bottom surface of the raw material mixing and heating barrel, and the bottom ends of the support columns are inserted into the positioning holes.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] According to the present invention, during the process of processing and mixing raw materials in a raw material tank connected to an extruder, the raw materials located at the center and the outside of the raw material tank can be exchanged with each other, thereby ensuring that the temperatures of the raw materials at the center and the edge of the tank body remain close during the raw material mixing process, and there is no temperature difference between the inside and the outside. Moreover, when the raw materials are exchanged inside and outside, the raw materials can be mixed more fully and more evenly, thereby effectively ensuring the quality of the pipe formed after the raw materials extruded by the extruder are formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG1 is a schematic diagram of the overall structure of the present invention;

[0019] FIG2 is a schematic structural diagram of a mixing and stirring mechanism of the present invention;

[0020] FIG3 is a top view of the mixing and stirring mechanism of the present invention;

[0021] FIG4 is an enlarged view of the structure of point A in FIG2 of the present invention;

[0022] FIG5 is an enlarged view of the structure at B in FIG3 of the present invention;

[0023] FIG6 is an enlarged view of the structure at point C in FIG4 of the present invention.

[0024] In the figure: 1. screw extruder; 2. extruder storage box; 3. connecting material pipe; 4. raw material mixing and heating barrel; 5. mixing and stirring mechanism; 501. central rotating shaft; 502. stirring rod; 503. L-shaped mixing and stirring blade; 504. driving motor; 505. hanging ring; 506. transmission gear; 6. raw material internal and external exchange mechanism; 601. central vertical rod; 602. peripheral vertical rod; 603. first transmission shaft; 604. second transmission shaft; 605. rotating exchange impeller; 606. impeller rotating shaft; 607. synchronous pulley; 608. transmission pulley; 609. transmission belt; 610. meshing transmission gear; 611. reverse drive gear; 612. supporting rotating shaft; 613. positioning shaft; 614. reverse synchronous gear; 615. reverse transmission gear; 7. raw material conveying pump; 8. feeding funnel; 9. heating plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] The driving motor (model 100L1-2 / 3KW) ​​mentioned in the present invention can be purchased from the market or customized.

[0027] Referring to Figures 1 to 6, an embodiment of the present invention provides an extruder for producing CPVC cable pipes, comprising a screw extruder 1, an extruder storage box 2 being provided above the screw extruder 1, a connecting material pipe 3 being connected to the top of the extruder storage box 2, a raw material delivery pump 7 being provided at the other end of the connecting material pipe 3, a raw material mixing and heating barrel 4 being provided above the raw material delivery pump 7, the raw material mixing and heating barrel 4 being connected to the raw material delivery pump 7 by a pipeline, and a mixing and stirring mechanism 5 and a raw material internal and external exchange mechanism 6 being provided inside the raw material mixing and heating barrel 4;

[0028] The mixing and stirring mechanism 5 includes a drive motor 504, a central rotating shaft 501, a stirring rod 502 and an L-shaped mixing and stirring blade 503. The drive motor 504 is located on one side of the top end of the central rotating shaft 501, the stirring rod 502 is fixed to the outside of the central rotating shaft 501, the L-shaped mixing and stirring blade 503 is fixed to the outside of the stirring rod 502, and a plurality of transmission teeth 506 are arranged on the outer surface of the bent end of the L-shaped mixing and stirring blade 503. The drive motor 504 and the central rotating shaft 501 are driven by two meshing gears. A hanging ring 505 is fixedly provided on the outer side of the top end of the central rotating shaft 501, and the hanging ring 505 is rotatably engaged with the inner wall of the raw material mixing and heating barrel 4. The raw material internal and external exchange mechanism 6 includes a central vertical rod 601, a peripheral vertical rod 602, a rotating exchange impeller 605 and a power connection assembly. The rotating exchange impeller 605 is movably mounted on the central vertical rod 601 and the peripheral vertical rod 602. When the L-shaped mixing and stirring blade 503 rotates with the stirring rod 502 and the central rotating shaft 501, it will contact with the power connection assembly and the power connection assembly will operate. Then the power assembly will drive the rotating exchange impeller 605 to rotate to exchange the positions of the raw materials at the center and edge of the raw material mixing and heating barrel 4.

[0029] The power connection assembly also includes a first transmission shaft 603 and a second transmission shaft 604. The first transmission shaft 603 is located inside the outer vertical rod 602, and the second transmission shaft 604 is located inside the central vertical rod 601. The outer surfaces of the first transmission shaft 603 and the second transmission shaft 604 are provided with multiple equally spaced transmission pulleys 608. A transmission belt 609 is sleeved on the outer side of the transmission pulley 608, and a synchronous pulley 607 is provided on the inner side of the other end of the transmission belt 609. An impeller shaft 606 is provided through the middle of the synchronous pulley 607, and the bottom end of the impeller shaft 606 passes through the rotating exchange impeller 605 located below this synchronous pulley 607.

[0030] The outer surfaces of the upper and lower ends of the impeller shaft 606 are both provided with annular grooves, in which sealing rings are embedded. The outer edges of the sealing rings are clamped in the inner walls of the central vertical rod 601 and the outer vertical rod 602 and rotate and rub against the central vertical rod 601 and the outer vertical rod 602.

[0031] By adopting the above-mentioned technical solution, the gaps between the upper and lower ends of the rotating exchange impeller 605 and the central vertical rod 601 and the outer vertical rod 602 can be filled to prevent the raw materials in the raw material mixing and heating barrel 4 from penetrating into the central vertical rod 601 and the outer vertical rod 602 and hindering the normal operation of the internal components of the central vertical rod 601 and the outer vertical rod 602.

[0032] A reverse synchronization gear 614 is fixedly provided on the outer side of the top end of the second transmission shaft 604, a support shaft 612 is provided through the middle of the reverse synchronization gear 614, a reverse drive gear 611 is provided on the outer side of the top end of the support shaft 612, and a meshing transmission gear 610 is provided on one side of the reverse drive gear 611 and the outer side of the top end of the first transmission shaft 603. The meshing transmission gear 610 is meshed with the transmission teeth 506 on the outer surface of the bent end of the L-shaped mixing and stirring blade 503 and the reverse drive gear 611 in contact with the meshing transmission gear 610.

[0033] By adopting the above-mentioned technical solution, when the L-shaped mixing and stirring blade 503 moves in a circular motion around the axis of the central rotating shaft 501 driven by the central rotating shaft 501 and the stirring rod 502, the meshing transmission gear 610 rotates when the L-shaped mixing and stirring blade 503 passes through the central vertical rod 601 and the outer vertical rod 602, so that all the rotating exchange impellers 605 rotate, and the raw materials stored in the raw material mixing and heating barrel 4 are exchanged in the inner and outer positions.

[0034] Among them, a positioning shaft 613 is provided through the middle of the meshing transmission gear 610 that is meshed with the reverse drive gear 611. Both ends of the positioning shaft 613 are inserted into the inner wall of the central vertical rod 601 and ball bearings are provided on the outer side of the end. The upper and lower surfaces of the meshing transmission gear 610 are provided with annular grooves, and the inner side of the annular groove is inlaid with an alloy sealing ring. The alloy sealing ring is clamped in the inner wall of the central vertical rod 601 and the outer vertical rod 602 and is slidably connected to the central vertical rod 601 and the outer vertical rod 602.

[0035] By adopting the above-mentioned technical solution, the alloy sealing rings located on the upper and lower surfaces of the meshing transmission gear 610 seal the gaps between 60 and the central vertical rod 601 and the outer vertical rod 602 without affecting the rotation of the meshing transmission gear 610, thereby preventing the raw materials in the raw material mixing and heating barrel 4 from penetrating into the interior of the central vertical rod 601 and the outer vertical rod 602.

[0036] Among them, the distance between the bottom end of the central vertical rod 601 and the inner bottom surface of the raw material mixing and heating barrel 4 is greater than five centimeters. Four support columns are arranged between the central vertical rod 601 and the raw material mixing and heating barrel 4. The top ends of the four support columns are fixed to the bottom of the central vertical rod 601 by welding. Four positioning holes are arranged on the inner bottom surface of the raw material mixing and heating barrel 4, and the bottom ends of the support columns are inserted into the positioning holes.

[0037] By adopting the above technical solution, the central vertical rod 601 of the support column supports and maintains a gap between the central vertical rod 601 and the bottom surface of the raw material mixing and heating barrel 4. The bottom end of the central vertical rod 601 will not block the raw material outlet at the bottom end of the raw material mixing and heating barrel 4, so that the raw materials can flow out of the raw material mixing and heating barrel 4 smoothly.

[0038] Among them, two feeding funnels 8 are provided at the top of the raw material mixing and heating barrel 4, and a solenoid valve is provided on the inner side of the bottom end of the feeding funnel 8. Two C-shaped and symmetrical heating plates 9 are provided inside the shell of the raw material mixing and heating barrel 4, and electric heating wires are provided inside the heating plates 9. The electric heating wires are connected to the external power supply through electric wires.

[0039] By adopting the above technical solution, raw materials can be added to the raw material mixing and heating barrel 4 from the outside, and the raw materials inside the raw material mixing and heating barrel 4 can be heated by the heating plate 9 to avoid the raw materials inside the raw material mixing and heating barrel 4 from cooling and solidifying.

[0040] Working principle: First, the raw materials for producing cable pipes are fed into the raw material mixing and heating barrel 4, and the entire power supply of the extruder is turned on. After the power is turned on, the heating plate 9 is energized and generates heat. The heat will be transferred to the raw materials inside the raw material mixing and heating barrel 4 through the shell of the raw material mixing and heating barrel 4. When the heating plate 9 heats and melts the raw materials inside the raw material mixing and heating barrel 4, the drive motor 504 can be started to drive the central shaft 501 and the stirring rod 502 to rotate around the axis of the central shaft 501. At this time, the L-shaped mixing and stirring blade 503 will rotate synchronously under the drive of the stirring rod 502. At this time, the rotating L-shaped mixing and stirring blade 503 will rotate through the middle of the central vertical rod 601 and the outer vertical rod 602;

[0041] When the L-shaped mixing blade 503 passes through the middle of the central vertical rod 601 and the outer vertical rod 602, it will drive the meshing transmission gear 610 in the central vertical rod 601 and the outer vertical rod 602 to rotate. When the meshing transmission gear 610 rotates, it will drive the first transmission shaft 603 and the reverse drive gear 611 to rotate. At this time, the reverse drive gear 611 will drive the supporting shaft 612 to rotate so that the reverse synchronous gear 614 and the reverse transmission gear 615 meshed with the reverse synchronous gear 614 rotate synchronously. At this time, the reverse transmission gear 615 will drive the second transmission shaft 604 to rotate. At the same time, the first transmission shaft 603 directly connected to the meshing transmission gear 610 in the outer vertical rod 602 will rotate at the same time, and the first transmission shaft 603, The rotation direction of the second transmission shaft 604 is completely opposite. At this time, the first transmission shaft 603 and the second transmission shaft 604 will drive the transmission pulley 608 to rotate, so that the transmission pulley 608 drives the synchronous pulley 607 to rotate through the transmission belt 609. At this time, the synchronous pulley 607 will drive the impeller shaft 606 to rotate, so that the rotating exchange impeller 605 rotates around the axis of the impeller shaft 606. At this time, the two rotating exchange impellers 605 with opposite rotation directions on the same layer will exchange the positions of the raw materials located at the center and the edge of the raw material mixing and heating barrel 4, so that the raw materials at the edge with higher temperature enter the center, and the raw materials at the center with lower temperature reach the edge for heating, ensuring that the temperature of the raw materials at the center and edge of the raw material mixing and heating barrel 4 remain close during the raw material mixing process, and there is no temperature difference between the inside and outside.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An extruder for producing CPVC cable pipes, comprising a screw extruder (1), characterized in that: An extruder material storage box (2) is arranged above the screw extruder (1), the top of the extruder material storage box (2) is connected to a connecting material pipe (3), the other end of the connecting material pipe (3) is arranged with a raw material delivery pump (7), a raw material mixing and heating barrel (4) is arranged above the raw material delivery pump (7), the raw material mixing and heating barrel (4) and the raw material delivery pump (7) are connected by a pipeline, and a mixing and stirring mechanism (5) and a raw material internal and external exchange mechanism (6) are arranged inside the raw material mixing and heating barrel (4); the mixing and stirring mechanism (5) comprises a driving motor (504), a central rotating shaft (501), a stirring rod (502) and an L-shaped mixing A stirring blade (503), the driving motor (504) is located on one side of the top end of the central rotating shaft (501), the stirring rod (502) is fixed on the outside of the central rotating shaft (501), the L-shaped mixing stirring blade (503) is fixed on the outside of the stirring rod (502), and a plurality of transmission teeth (506) are arranged on the outer surface of the bent end of the L-shaped mixing stirring blade (503), the driving motor (504) and the central rotating shaft (501) are transmitted through two meshing gears, and a hanging ring (505) is fixedly provided on the outside of the top end of the central rotating shaft (501), and the hanging ring (505) is rotatably engaged in the inner wall of the raw material mixing and heating barrel (4); The raw material internal and external exchange mechanism (6) includes a central vertical rod (601), an outer vertical rod (602), a rotating exchange impeller (605) and a power connection component. The rotating exchange impeller (605) is movably mounted on the central vertical rod (601) and the outer vertical rod (602). When the L-shaped mixing and stirring blades (503) rotate along with the stirring rod (502) and the central rotating shaft (501), they will contact with the power connection component and operate the power connection component. Then, the power component will drive the rotating exchange impeller (605) to rotate to exchange the positions of the raw materials at the center and edge of the raw material mixing and heating barrel (4).

2. The extruder for producing CPVC cable pipe according to claim 1, characterized in that: The power connection assembly also includes a first transmission shaft (603) and a second transmission shaft (604), wherein the first transmission shaft (603) is located inside the outer vertical rod (602), and the second transmission shaft (604) is located inside the central vertical rod (601), and the outer surfaces of the first transmission shaft (603) and the second transmission shaft (604) are both provided with a plurality of equally spaced transmission pulleys (608), a transmission belt (609) is sleeved on the outer side of the transmission pulley (608), and a synchronous pulley (607) is provided on the inner side of the other end of the transmission belt (609), and an impeller shaft (606) is provided through the middle of the synchronous pulley (607), and the bottom end of the impeller shaft (606) passes through a rotating exchange impeller (605) located below the synchronous pulley (607).

3. The extruder for producing CPVC cable pipe according to claim 2, characterized in that: A reverse synchronous gear (614) is fixedly provided on the outer side of the top end of the second transmission shaft (604), a supporting shaft (612) is provided through the middle of the reverse synchronous gear (614), a reverse driving gear (611) is provided on the outer side of the top end of the supporting shaft (612), and a meshing transmission gear (610) is provided on one side of the reverse driving gear (611) and the outer side of the top end of the first transmission shaft (603), and the meshing transmission gear (610) is meshed with the transmission teeth (506) on the outer surface of the bent end of the L-shaped mixing and stirring blade (503) and the reverse driving gear (611) in contact with the meshing transmission gear (610).

4. The extruder for producing CPVC cable pipe according to claim 3, characterized in that: A positioning shaft (613) is provided through the middle of the meshing transmission gear (610) that is meshed with the reverse driving gear (611). Both ends of the positioning shaft (613) are inserted into the inner wall of the central vertical rod (601) and ball bearings are provided on the outer sides of the ends.

5. The extruder for producing CPVC cable pipe according to claim 3, characterized in that: The upper and lower surfaces of the meshing transmission gear (610) are both provided with an annular groove, and an alloy sealing ring is embedded in the inner side of the annular groove. The alloy sealing ring is clamped in the inner walls of the central vertical rod (601) and the peripheral vertical rod (602) and is slidably connected with the central vertical rod (601) and the peripheral vertical rod (602).

6. The extruder for producing CPVC cable pipe according to claim 2, characterized in that: The outer surfaces of the upper and lower ends of the impeller shaft (606) are both provided with an annular groove, in which a sealing ring is embedded, and the outer edge of the sealing ring is clamped in the inner walls of the central vertical rod (601) and the outer vertical rod (602) to rotate and rub against the central vertical rod (601) and the outer vertical rod (602).

7. The extruder for producing CPVC cable pipe according to claim 1, characterized in that: Two feeding funnels (8) are arranged at the top of the raw material mixing and heating barrel (4), and a solenoid valve is arranged inside the bottom of the feeding funnel (8).

8. The extruder for producing CPVC cable pipe according to claim 1, characterized in that: Two C-shaped and symmetrical heating plates (9) are arranged inside the shell of the raw material mixing and heating barrel (4), and electric heating wires are arranged inside the heating plates (9), and the electric heating wires are connected to an external power source through electric wires.

9. The extruder for producing CPVC cable pipe according to claim 1, characterized in that: The distance between the bottom end of the central vertical rod (601) and the inner bottom surface of the raw material mixing and heating barrel (4) is greater than five centimeters, and four support columns are arranged between the central vertical rod (601) and the raw material mixing and heating barrel (4).

10. The extruder for producing CPVC cable pipe according to claim 9, characterized in that: The top ends of the four support columns are fixed to the bottom of the central vertical rod (601) by welding, and the inner bottom surface of the raw material mixing and heating barrel (4) is provided with four positioning holes, and the bottom ends of the support columns are inserted into the positioning holes.

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