Extruder for manufacturing CPVC conduit pipe

Abstract

To provide extruder for manufacturing CPVC conduit pipe.SOLUTION: The invention relates to the technical field of CPVC conduit extruder, the extruder is equipped with a screw extruder, the raw material tank of the extruder is provided above the screw extruder, a connection pipe is connected to the top end of the raw material tank of the extruder, and a raw material transport pump is provided at the other end of the connection pipe. During the raw material processing and mixing process of the raw material tank connected to the extruder, the position of the raw material in the center and outside of the raw material tank is exchanged so that the temperature of the raw material in the center and at the end of the tank are close to each other during the raw material mixing process, thereby eliminating the temperature difference between inside and outside.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of CPVC conduit extruders, in particular extruders for the manufacture of CPVC conduit. [Background technology]

[0002] Conduits, also known as power cable protection tubes, are metal protective tubes that are covered with the outer layer of a power cable and have a certain level of mechanical strength to prevent damage to the power cable. Power cable protection tubes are mainly installed at the intersections of communication cables and power cables to prevent short circuit accidents caused by breaks in the power cable, Conduit pipes are generally processed and manufactured using CPVC as the raw material. During production, the raw materials are first put into the raw material tank of the extruder, then the raw materials in the raw material tank are heated and melted, and then extruded by the extruder. Finally, the material extruded by the extruder is cooled and shaped to obtain the finished product.

[0003] When processing CPVC conduit, the raw material must first be melted and then extruded into a shape using an extruder. The raw material tank connected to the extruder uses external heating, and due to the temperature difference between the inside and outside of the raw material tank, the raw material extruded by the extruder will have defects after molding, which does not meet current needs. In response to this, we proposed an extruder for manufacturing CPVC conduit. Summary of the Invention [Problem to be solved by the invention]

[0004] The object of the present invention is to provide an extruder for manufacturing CPVC conduit to solve the problem mentioned in the background art mentioned above, that when processing CPVC conduit, the raw material must first be melted and then extruded by an extruder to be molded, and 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, so that the raw material extruded by the extruder will have defects after molding. [Means for solving the problem]

[0005] In order to achieve the above object, the present invention provides the following technical means: An extruder for manufacturing CPVC electric conduit equipped with a screw extruder, a raw material tank for the extruder is provided above the screw extruder, a connecting pipe is connected to the top end of the raw material tank for the extruder, a raw material transport pump is provided at the other end of the connecting pipe, a raw material mixing and heating tank is provided above the raw material transport pump, the raw material mixing and heating tank and the raw material transport pump are connected by piping, and a mixing and stirring mechanism and a raw material internal and external exchange mechanism are provided inside the raw material mixing and heating tank, The mixing and stirring mechanism includes a driving motor, a central rotating shaft, a stirring bar, and an L-shaped mixing and stirring blade, the driving motor is located on one side of the top end of the central rotating shaft, the stirring bar 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 bar, a plurality of transmission teeth are arranged on the outer surface of the curved end of the L-shaped mixing and stirring blade, the driving motor and the central rotating shaft are transmitted by two meshing gears, a hanging ring is fixed to the outside of the top end of the central rotating shaft, and the hanging ring is rotatably attached to the inner wall of the raw material mixing and heating tank, The raw material inside and outside exchange mechanism comprises a central vertical rod, a peripheral vertical rod, a rotary exchange impeller, and a power connection assembly, the rotary exchange impeller is movably mounted on the central vertical rod and the peripheral vertical rod, the L-shaped mixing and stirring blade comes into contact with the power connection assembly when it rotates following the stirring rod and the central rotating shaft, and activates the power connection assembly, and then the power connection assembly rotates the rotary exchange impeller to exchange the positions of the raw materials in the center and the ends inside the raw material mixing and heating tank, The power connection assembly further includes a first power transmission shaft and a second power transmission shaft, the first power transmission shaft being located inside a peripheral vertical rod and the second power transmission shaft being located inside a central vertical rod, a plurality of power transmission pulleys being equally spaced on outer surfaces of the first power transmission shaft and the second power transmission shaft, a power transmission belt being fitted on the outside of the power transmission pulleys, a timing pulley being provided on the inside of the other end of the power transmission belt, an impeller rotation shaft being inserted through the middle of the timing pulleys, and a bottom end of the impeller rotation shaft passing through a rotary exchange impeller below the timing pulley.

[0006] Preferably, a reverse timing gear is fixed to the outer side of the top end of the second power transmission shaft, a support rotating shaft is inserted through the middle of the reverse timing gear, a reverse driving gear is provided on the outer side of the top end of the support rotating shaft, and a meshing transmission gear is provided on one side of the reverse driving gear and on the outer side of the top end of the first power transmission shaft, and the meshing transmission gear is held in mesh with the transmission teeth on the outer surface of the curved end of the L-shaped mixing agitator and the reverse driving gear that is in contact with the meshing transmission gear.

[0007] Preferably, a seal ring is fitted in the annular engagement groove, and the outer edge of the seal ring is engaged with the inner walls of the central vertical rod and the peripheral vertical rod, and rotatably rubs against the central vertical rod and the peripheral vertical rod.

[0008] Preferably, a positioning shaft is inserted through the center of the meshing transmission gear which is held in mesh with the driving gear in the opposite direction, both ends of the positioning shaft are inserted into the inner wall of the central vertical rod, ball bearings are provided on the outside of the ends, annular grooves are provided on the upper and lower surfaces of the meshing transmission gear, an alloy seal ring is fitted into the inside of the annular groove, and the alloy seal ring is engaged with the inner walls of the central vertical rod and the peripheral vertical rod, and is slidably connected to the central vertical rod and the peripheral vertical rod.

[0009] Preferably, two feeding hoppers are provided at the top end of the raw material mixing heating tank, solenoid valves are provided inside the bottom ends of the feeding hoppers, two C-shaped symmetrical heating plates are provided inside the housing of the raw material mixing heating tank, heating wires are provided inside the heating plates, and the heating wires are connected to an external power source via power cords.

[0010] Preferably, the distance between the bottom end of the central vertical rod and the inner bottom surface of the raw material mixing heating tank is greater than 5 centimeters, four supports are provided in the middle between the central vertical rod and the raw material mixing heating tank, the top ends of the four supports and the bottom of the central vertical rod are fixed by welding, four positioning holes are provided on the inner bottom surface of the raw material mixing heating tank, and the bottom ends of the supports are inserted into the positioning holes. Effect of the Invention

[0011] Compared with the prior art, the advantages of the present invention include: In the present invention, during the raw material processing and mixing process of a raw material tank connected to an extruder, the positions of the raw materials in the center and outside of the raw material tank are exchanged, so that the raw material temperatures at the center and ends of the tank are close to each other during the raw material mixing process, eliminating the temperature difference between the inside and outside. This makes it possible to mix the raw materials more thoroughly and uniformly when exchanging the raw materials inside and outside, and effectively guarantees the quality of the pipe formed after the raw materials extruded by the extruder are molded. [Brief description of the drawings]

[0012] [Figure 1] 1 is a schematic overall configuration diagram of the present invention; [Diagram 2] FIG. 2 is a schematic diagram of a mixing and stirring mechanism of the present invention. [Diagram 3] FIG. 2 is a top view of the mixing and stirring mechanism of the present invention. [Figure 4] FIG. 3 is an enlarged view of portion A of FIG. 2 according to the present invention. [Diagram 5] FIG. 4 is an enlarged view of portion B of FIG. 3 according to the present invention. [Figure 6] FIG. 5 is an enlarged view of portion C of FIG. 4 according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, technical means in the embodiments of the present invention will be described in detail with reference to the drawings. It should be understood that the described embodiments are only some of the embodiments of the present invention and do not cover all of the embodiments.

[0014] The drive motor referred to in this invention (Model 100L1-2 / 3KW) ​​can be commercially obtained or privately customized.

[0015] 1 to 6, an embodiment provided by the present invention is an extruder for manufacturing CPVC electric conduit equipped with a screw extruder 1, a raw material tank of the extruder is provided above the screw extruder 1, a connecting pipe 3 is connected to the top end of the raw material tank of the extruder, a raw material transport pump 7 is provided at the other end of the connecting pipe 3, a raw material mixing and heating tank 4 is provided above the raw material transport pump 7, the raw material mixing and heating tank 4 and the raw material transport pump 7 are connected by piping, a mixing and stirring mechanism 5 and a raw material internal and external exchange mechanism 6 are provided inside the raw material mixing and heating tank 4, The mixing and stirring mechanism 5 includes a driving motor 504, a central rotating shaft 501, a stirring rod 502, and an L-shaped mixing and 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 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. A plurality of transmission teeth 506 are arranged on the outer surface of the curved end of the L-shaped mixing and stirring blade 503. Power is transmitted between the driving motor 504 and the central rotating shaft 501 by two meshing gears. A hanging ring 505 is fixed to the outside of the top end of the central rotating shaft 501. The hanging ring 505 is rotatably attached to the inner wall of the raw material mixing and heating tank 4. The raw material inside and outside exchange mechanism 6 comprises a central vertical rod 601, a peripheral vertical rod 602, a rotary exchange impeller 605, and a power connection assembly. The rotary 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 following the stirring rod 502 and the central rotating shaft 501, it comes into contact with the power connection assembly, which activates the power connection assembly. Then, the power connection assembly rotates the rotary exchange impeller 605 to exchange the positions of the raw materials in the center and the ends inside the raw material mixing and heating tank 4. The power transmission assembly further includes a first power transmission shaft 603 and a second power transmission shaft 604, the first power transmission shaft 603 being located inside the peripheral vertical rod 602, and the second power transmission shaft 604 being located inside the central vertical rod 601. A plurality of power transmission pulleys 608 are equally spaced on the outer surfaces of the first power transmission shaft 603 and the second power transmission shaft 604. A power transmission belt 609 is fitted on the outside of the power transmission pulleys 608. A timing pulley 607 is provided on the inside of the other end of the power transmission belt 609. An impeller rotating shaft 606 is inserted through the middle of the timing pulley 607, and the bottom end of the impeller rotating shaft 606 passes through the rotating exchange impeller 605 below the timing pulley 607.

[0016] An annular engagement groove is provided on the outer surface of the upper and lower ends of the impeller rotating shaft 606, and a seal ring is fitted into the annular engagement groove. The outer edge of the seal ring is engaged with the inner walls of the central vertical rod 601 and the peripheral vertical rod 602, and rotatably rubs against the central vertical rod 601 and the peripheral vertical rod 602.

[0017] By adopting the above technical means, the gaps between the upper and lower ends of the rotary exchange impeller 605 and the central vertical rod 601 and the peripheral vertical rod 602 can be filled, and the raw materials in the raw material mixing and heating tank 4 can be prevented from entering the central vertical rod 601 and the peripheral vertical rod 602 and interfering with the normal operation of the internal components of the central vertical rod 601 and the peripheral vertical rod 602.

[0018] A reverse timing gear 614 is fixed to the outside of the top end of the second power transmission shaft 604, a support rotation shaft 612 is inserted through the middle of the reverse timing gear 614, a reverse drive gear 611 is provided on the outside of the top end of the support rotation shaft 612, and an intermeshing transmission gear 610 is provided on one side of the reverse drive gear 611 and on the outside of the top end of the first power transmission shaft 603, and the intermeshing transmission gear 610 is held in mesh with the transmission teeth 506 on the outer surface of the curved end of the L-shaped mixing agitator 503 and the reverse drive gear 611 in contact with the intermeshing transmission gear 610.

[0019] By adopting the above technical means, when the L-shaped mixing impeller 503 is moved by the central rotating shaft 501 and the stirring rod 502 to perform a circular motion around the axis of the central rotating shaft 501, the L-shaped mixing impeller 503 passes through the central vertical rod 601 and the peripheral vertical rod 602 and rotates through the meshing transmission gear 610, so that all the rotating exchange impellers 605 rotate, and the inside and outside positions of the raw materials stored in the raw material mixing and heating tank 4 are exchanged.

[0020] A positioning shaft 613 is inserted through the center of the meshing transmission gear 610, which is held in mesh 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 outside of the ends. Annular grooves are provided on the upper and lower surfaces of the meshing transmission gear 610 and an alloy seal ring is fitted inside the annular groove. The alloy seal ring is engaged with the inner walls of the central vertical rod 601 and the peripheral vertical rod 602 and is slidably connected to the central vertical rod 601 and the peripheral vertical rod 602.

[0021] By adopting the above technical means, the alloy seal rings located on the upper and lower surfaces of the interlocking transmission gear 610 do not affect the rotation of the interlocking transmission gear 610, and at the same time, seal the gaps between the interlocking transmission gear 610 and the central vertical rod 601 and the peripheral vertical rod 602, thereby preventing the raw materials in the raw material mixing and heating tank 4 from entering the inside of the central vertical rod 601 and the peripheral vertical rod 602.

[0022] The distance between the bottom end of the central vertical rod 601 and the inner bottom surface of the raw material mixing heating tank 4 is greater than 5 centimeters, four supports are provided in the middle between the central vertical rod 601 and the raw material mixing heating tank 4, the top ends of the four supports and the bottom of the central vertical rod 601 are fixed by welding, four positioning holes are provided on the inner bottom surface of the raw material mixing heating tank 4, and the bottom ends of the supports are inserted into the positioning holes.

[0023] By adopting the above technical means, the support pillar supports the central vertical rod 601 and maintains a gap between the central vertical rod 601 and the bottom surface of the raw material mixing and heating tank 4, so that the bottom end of the central vertical rod 601 does not obstruct the raw material outlet at the bottom end of the raw material mixing and heating tank 4, allowing the raw materials to flow out of the raw material mixing and heating tank 4 smoothly.

[0024] Two feeding hoppers 8 are provided at the top end of the raw material mixing heating tank 4, and solenoid valves are provided inside the bottom ends of the feeding hoppers 8. Two C-shaped symmetrical heating plates 9 are provided inside the housing of the raw material mixing heating tank 4, and electric heating wires are provided inside the heating plates 9, and the electric heating wires are connected to an external power source via power cords.

[0025] By adopting the above technical means, raw materials can be added from outside into the raw material mixing heating tank 4 during the mixing process, and the raw materials in the raw material mixing heating tank 4 can be heated by the heating plate 9, preventing the raw materials in the raw material mixing heating tank 4 from dropping in temperature and solidifying.

[0026] Working principle: First, the raw materials for electric conduit manufacturing are sent into the raw material mixing heating tank 4, and the power supply for the entire extruder is turned on. After the power supply is turned on, the heating plate 9 is energized to generate heat, and the heat is transferred to the raw materials in the raw material mixing heating tank 4 through the housing of the raw material mixing heating tank 4. When the heating plate 9 heats and melts the raw materials in the raw material mixing heating tank 4, the driving motor 504 is started to rotate the central rotating shaft 501 and the stirring rod 502 around the axis of the central rotating shaft 501. At this time, the L-shaped mixing stirring blade 503 is rotated at the same time by the driving of the stirring rod 502, and the rotating L-shaped mixing stirring blade 503 passes between the central vertical rod 601 and the peripheral vertical rod 602 while rotating; When the L-shaped mixing impeller 503 passes between the central vertical rod 601 and the peripheral vertical rod 602, it rotates the meshing transmission gear 610 in the central vertical rod 601 and the peripheral vertical rod 602. When the meshing transmission gear 610 rotates, it rotates the first power transmission shaft 603 and the reverse drive gear 611. At this time, the reverse drive gear 611 rotates the support rotation shaft 612, and the reverse timing gear 614 and the reverse transmission gear 615 that is held in mesh with the reverse timing gear 614 rotate simultaneously. At this time, the reverse transmission gear 615 rotates the second power transmission shaft 604, and the first power transmission shaft 603 located in the peripheral vertical rod 602 and directly connected to the meshing transmission gear 610 rotates simultaneously, and the first power transmission shaft 603 and the second power transmission shaft 604 rotate in completely opposite directions. At this time, the first power transmission shaft 603 and the second power transmission shaft 604 rotate the power transmission pulley 608, and the power transmission pulley 608 rotates the timing pulley 607 via the power transmission belt 609, and the timing pulley 607 rotates the impeller rotation shaft 606, causing the rotary exchange impeller 605 to rotate around the axis of the impeller rotation shaft 606. At this time, the two rotary exchange impellers 605 rotating in opposite directions in the same layer exchange the positions of the raw materials at the center and the ends of the raw material mixing heating tank 4, so that the raw materials at the ends with higher temperatures are placed in the center and the raw materials at the center with lower temperatures are moved to the ends and heated, so that the temperatures of the raw materials at the center and the ends of the raw material mixing heating tank 4 during the raw material mixing process become close to each other, and the temperature difference between the inside and the outside is eliminated.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiment, and may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-limiting, and the scope of the present invention is limited by the appended claims, not the above description, and all changes that are within the meaning and range of the equivalents of the claims are intended to be embraced by the present invention. Any reference numerals of the drawings in the claims should not be considered as limiting the scope of such claims. [Explanation of symbols]

[0028] 1 Screw Extruder 2. Extruder raw material tank 3. Connecting Pipe 4. Raw material mixing heating tank 5 Mixing and stirring mechanism 501 Central Rotation Axis 502 Stirring rod 503 L-shaped mixing impeller 504 Drive motor 505 Hanging Ring 506 Transmission teeth 6 Raw material internal / external exchange mechanism 601 Central vertical rod 602 Peripheral vertical rod 603 First power transmission shaft 604 Second power transmission shaft 605 Rotating exchange impeller 606 Impeller Rotating Shaft 607 Timing pulley 608 Power transmission pulley 609 Power Transmission Belt 610 Meshing Transmission Gear 611 Reverse drive gear 612 Support Rotating Shaft 613 Positioning shaft 614 Reverse timing gear 615 Reverse transmission gear 7. Raw material transport pump 8 Feeding hopper 9 Heating plate

Claims

1. An extruder for manufacturing CPVC electric conduit pipes, the extruder having a screw extruder (1), an extruder raw material tank (2) provided above the screw extruder (1), a connecting pipe (3) connected to the top end of the extruder raw material tank (2), a raw material transport pump (7) provided at the other end of the connecting pipe (3), a raw material mixing and heating tank (4) provided above the raw material transport pump (7), the raw material mixing and heating tank (4) and the raw material transport pump (7) are connected by piping, and a mixing and stirring mechanism (5) and a raw material internal / external exchange mechanism (6) are provided inside the raw material mixing and heating tank (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 and 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 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), a plurality of transmission teeth (506) are arranged on the outer surface of the curved end of the L-shaped mixing and stirring blade (503), power is transmitted between the driving motor (504) and the central rotating shaft (501) by two meshing gears, a hanging ring is fixed to the outside of the top end of the central rotating shaft (501), and the hanging ring is rotatably attached to the inner wall of the raw material mixing and heating tank (4), The raw material inside / outside exchange mechanism (6) comprises a central vertical rod (601), a peripheral vertical rod (602), a rotary exchange impeller (605), and a power connection assembly, the rotary exchange impeller (605) is movably mounted on the central vertical rod (601) and the peripheral vertical rod (602), the L-shaped mixing and stirring blade (503) comes into contact with the power connection assembly when it rotates following the stirring rod (502) and the central rotating shaft (501), and activates the power connection assembly, and then the power connection assembly rotates the rotary exchange impeller (605) to exchange the positions of the raw materials in the center and the ends inside the raw material mixing and heating tank (4); The power connection assembly further includes a first power transmission shaft (603) and a second power transmission shaft (604), the first power transmission shaft (603) being located inside the peripheral vertical rod (602), and the second power transmission shaft (604) being located inside the central vertical rod (601). A plurality of power transmission pulleys (608) are provided at equal intervals on the outer surfaces of the first power transmission shaft (603) and the second power transmission shaft (604). A power transmission belt (609) is fitted on the outside of the power transmission pulleys (608). A timing pulley (607) is provided on the inside of the other end of the power transmission belt (609). An impeller rotation shaft (606) is inserted through the middle of the timing pulley (607). The bottom end of the impeller rotation shaft (606) passes through the rotary exchange impeller (605) below the timing pulley (607). A reverse timing gear (614) is fixed to the outer side of the top end of the second power transmission shaft (604), a support rotating shaft (612) is inserted through the middle of the reverse timing gear (614), a reverse driving gear (611) is provided on the outer side of the top end of the support rotating shaft (612), and a meshing transmission gear (610) is provided on one side of the reverse driving gear (611) and on the outer side of the top end of the first power transmission shaft (603), and the meshing transmission gear (610) is held in mesh with the transmission teeth (506) on the outer surface of the curved end of the L-shaped mixing agitator (503) and the reverse driving gear (611) that is in contact with the meshing transmission gear (610).

1. An extruder for manufacturing CPVC electrical conduit, comprising:

2. 2. The extruder for manufacturing CPVC electric conduit pipe as claimed in claim 1, characterized in that a positioning shaft (613) is inserted through the center of the meshing transmission gear (610) which is held in mesh 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 outside of the ends.

3. 2. The extruder for manufacturing CPVC electric conduit according to claim 1, wherein annular grooves are provided on the upper and lower surfaces of the meshing transmission gear (610), an alloy seal ring is fitted inside the annular groove, the alloy seal ring is engaged with the inner walls of the central vertical rod (601) and the peripheral vertical rod (602), and is slidably connected to the central vertical rod (601) and the peripheral vertical rod (602).

4. 2. The extruder for manufacturing CPVC electric conduit according to claim 1, characterized in that annular engagement grooves are provided on the outer surfaces of the upper and lower ends of the impeller rotating shaft (606), a seal ring is fitted into the annular engagement groove, and an outer edge of the seal ring is engaged with the inner walls of the central vertical rod (601) and the peripheral vertical rod (602) and rotatably rubs against the central vertical rod (601) and the peripheral vertical rod (602).

5. 2. The extruder for manufacturing CPVC electric conduit pipe as claimed in claim 1, characterized in that: the top end of the raw material mixing and heating tank (4) is provided with two input hoppers (8), and the bottom end of the input hoppers (8) is provided with an electromagnetic valve inside.

6. The extruder for manufacturing CPVC electric conduit according to claim 1, characterized in that the inside of the housing of the raw material mixing heating tank (4) is provided with two C-shaped symmetrical heating plates (9), the inside of the heating plates (9) is provided with an electric heating wire, and the electric heating wire is connected to an external power source via a power cord.

7. 2. The extruder for producing CPVC electric conduit as claimed in 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 tank (4) is greater than 5 centimeters, and four supports are provided in the middle between the central vertical rod (601) and the raw material mixing and heating tank (4).

8. The extruder for manufacturing CPVC electric conduit as claimed in claim 7, characterized in that the top ends of the four pillars and the bottom of the central vertical rod (601) are fixed by welding, four positioning holes are provided on the inner bottom surface of the raw material mixing and heating tank (4), and the bottom ends of the pillars are inserted into the positioning holes.

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