An automatic feeding device for plastic pipe production

Abstract

This invention relates to the field of plastic pipe production and discloses an automatic feeding device for plastic pipe production, including a lifting pipe and a feeding box. A first spiral blade is installed inside the lifting pipe, rotatably mounted inside the lifting pipe. A second spiral blade is installed inside the feeding box, rotatably mounted on the inner wall of the feeding box, with one end of the second spiral blade extending to the bottom of the lifting pipe. This invention improves the purity of the finished plastic product by adding plastic raw material into the feeding box and then rotating the second spiral blade to screw the plastic raw material into the lifting pipe. Simultaneously, water is sprayed above the second spiral blade by a spraying device to clean the plastic raw material on the second spiral blade.

Description

Technical Field

[0001] This invention relates to the field of plastic pipe production technology, specifically to an automatic feeding device for plastic pipe production. Background Technology

[0002] Plastic pipe manufacturing equipment typically includes an extruder, die head, shaping and cooling system, traction machine, and cutting device. Specifically, the extruder is the core equipment in plastic pipe production; it extrudes molten plastic into pipes of a specific shape. The die head is a key component of the extruder, controlling the pipe's diameter and thickness. The shaping and cooling system cools and shapes the freshly extruded pipe. The traction machine straightens and pulls the pipe at a uniform speed to ensure its length and diameter. The cutting device cuts the pulled-out pipe to a specific length. In addition, auxiliary equipment such as dryers, feeders, and molds are also essential in plastic pipe production.

[0003] Existing technologies cannot clean the raw materials during the lifting process. Because the raw materials have impurities and dust on their surface, the quality of the produced plastic pipes cannot be guaranteed due to their low purity. Summary of the Invention

[0004] This invention provides the following technical solution:

[0005] An automatic feeding device for plastic pipe production includes a lifting pipe and a feeding box. A first spiral blade is installed inside the lifting pipe and is rotatably installed inside the lifting pipe. A second spiral blade is installed inside the feeding box and is rotatably installed on the inner wall of the feeding box. One end of the second spiral blade extends to the bottom of the lifting pipe.

[0006] A spraying device is installed on the top of the feed box, which sprays external water into the inside of the feed box.

[0007] The surface of the second spiral blade is connected to a first stirring rod, which is used to stir the plastic material entering the feed box;

[0008] By adding plastic raw materials into the feed box and rotating the second spiral blade, the plastic raw materials are screwed into the riser pipe. At the same time, water is sprayed above the second spiral blade through a spraying device to clean the plastic raw materials on the second spiral blade, thereby improving the purity of the finished plastic product.

[0009] Preferably, the lifting pipe is inclined, and a discharge pipe is connected to the top of the lifting pipe. The outlet of the discharge pipe faces downward. A through hole is opened on the first spiral blade. By opening a through hole on the first spiral blade, hot air can be blown to the plastic material through the through hole, so as to better dissipate heat from the plastic material.

[0010] Preferably, a first rotating shaft is fixedly connected to the middle of the first spiral blade, and the two ends of the first rotating shaft are rotatably connected to the two ends of the lifting tube, respectively. A first motor is connected to the top of the lifting tube, and the output end of the first motor is connected to the top end of the first rotating shaft. The gap between the edge of the first spiral blade and the lifting tube is smaller than the diameter of a single plastic particle.

[0011] Preferably, a heating wire is fixedly installed inside the top of the lifting tube, the heating wire is connected to an external power source, an air inlet is opened at the top of the lifting tube, the air inlet is connected to an external blower, and the air generated by the blower is injected into the lifting tube and blown to the bottom of the lifting tube through the heating wire.

[0012] By setting heating wires and air inlets, when the first spiral blade rotates, it lifts the plastic material into the inside of the lifting tube. The blower then allows air to enter the inside of the lifting tube from the air inlet, and the air is heated into hot air by the heating wire, thereby heating and drying the material inside the lifting tube.

[0013] Preferably, a second rotating shaft is fixedly connected to the middle of the second spiral blade, a second motor is connected to one end of the second rotating shaft, one end of the second rotating shaft is rotatably connected to the inner wall of the feed box, and the other end of the second rotating shaft is rotatably connected to the inner wall of the lifting pipe.

[0014] Preferably, a third rotating shaft is provided inside the feed box, and a second stirring rod is connected to the outer wall of the third rotating shaft. Both ends of the third rotating shaft are rotatably connected to the inner wall of the feed box. Both ends of the third rotating shaft and the second rotating shaft are connected to drive wheels. The multiple drive wheels are connected to each other by a drive belt, and the third rotating shaft and the second rotating shaft rotate synchronously.

[0015] The plastic raw materials inside the feed box are stirred by the simultaneous rotation of the third and second rotating shafts, and by the rotation of the first stirring rod on the outer wall of the second rotating shaft and the second stirring rod on the outer wall of the third rotating shaft, so that each piece of plastic raw material can be cleaned by the water mist sprayed by the spraying device.

[0016] Preferably, a top cover is installed on the top of the feeding box, the top cover is snapped onto the top of the feeding box, a feeding hopper is opened at one end of the top cover, and a water outlet is opened at one end of the bottom of the feeding box, so that the wastewater from washing plastic raw materials can be discharged from the water outlet.

[0017] Preferably, the spraying device includes a water pump, the outlet of the water pump is connected to a main water pipe, the bottom of the main water pipe is connected to a branch water pipe, the bottom of the branch water pipe is connected to a spray pipe, the bottom of the spray pipe is provided with a spray hole, the spray hole is located inside the feed box, and the spray hole is aligned with the top of the second spiral blade.

[0018] External water is pressurized by a water pump and injected sequentially into the main water pipe, branch water pipe, and spray pipe. Finally, the water is sprayed from the spray hole onto the top of the second spiral blade to clean the plastic raw material.

[0019] Preferably, a heating device is installed on the outside of the riser pipe. The heating device includes an annular box, which is fixed to the outer wall of the riser pipe. A cavity is formed around the annular box, and a connecting pipe is connected to the upper and lower ends of the cavity. The connecting pipe forms an S-shaped channel around the annular box. A circulation pipe is connected to the ends of two adjacent cavities. A heating circulation pump is connected to the top of the circulation pipe. A heat-conducting liquid is injected into the inside of the cavity.

[0020] The heat-conducting liquid inside the S-shaped cavity is circulated and heated by a heating circulation pump, thereby exchanging heat between the high-temperature heat-conducting liquid and the inside of the riser tube, drying and heating the plastic raw material inside the riser tube, and improving the drying effect.

[0021] A movable sleeve is provided at the upper part of the inside of the lifting tube. A fixed sleeve is fixedly connected to the inner wall of the lifting tube. An annular groove is formed between the fixed sleeve and the inner wall of the lifting tube. The movable sleeve is slidably connected to the inside of the annular groove. A spring is connected between the bottom end of the movable sleeve and the inner wall of the annular groove. Multiple baffle rods are connected to the inner wall of the movable sleeve. The baffle rods are inclined. An air hole is opened on the side wall of the lifting tube. The air hole communicates with the inside of the annular groove.

[0022] Compared with the prior art, the present invention provides an automatic feeding device for the production of plastic pipes, which has the following advantages:

[0023] 1. The present invention improves the purity of the finished plastic product by adding plastic raw materials into the feed box and rotating the second spiral blade to screw the plastic raw materials into the riser tube. At the same time as screwing in, water is sprayed above the second spiral blade by a spraying device to clean the plastic raw materials on the second spiral blade.

[0024] 2. This invention uses a heating circulation pump to circulate and heat the heat-conducting liquid inside the S-shaped cavity, thereby allowing the high-temperature heat-conducting liquid to exchange heat with the inside of the riser tube, drying and heating the plastic raw material inside the riser tube, and improving the drying effect.

[0025] 3. In this invention, an external water source is pressurized by a water pump and injected sequentially into the main water pipe, the branch water pipe and the spray pipe. Finally, the water is sprayed from the spray hole to the top of the second spiral blade to spray and clean the plastic raw material.

[0026] 4. By setting up a heating wire and an air inlet, when the first spiral blade rotates and lifts the plastic raw material into the inside of the lifting tube, the blower allows air to enter the inside of the lifting tube from the air inlet, and the air is heated into hot air by the heating wire, thereby heating and drying the raw material inside the lifting tube. Attached Figure Description

[0027] Figure 1 This is a perspective view of the entire invention;

[0028] Figure 2 This is a cross-sectional view of the present invention;

[0029] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a perspective view of the first and second helical plates of the present invention;

[0031] Figure 5 This is a perspective view of the second spiral blade and the third rotating shaft of the present invention;

[0032] Figure 6 This is a perspective view of the feed box and the riser of the present invention;

[0033] Figure 7 This is a perspective view of the spraying device of the present invention;

[0034] Figure 8 This is a perspective view of the heating device of the present invention;

[0035] Figure 9 This is a schematic diagram illustrating the installation of the movable sleeve of the present invention;

[0036] Figure 10 This is a perspective view of the movable sleeve and the deflector bar of the present invention.

[0037] In the diagram: 100, lifting pipe; 101, discharge pipe; 102, air inlet; 103, first rotating shaft; 104, first spiral blade; 105, through hole; 106, first motor; 107, heating wire; 200, feed box; 201, second rotating shaft; 202, second spiral blade; 203, first stirring rod; 204, third rotating shaft; 205, second stirring rod; 206, transmission wheel; 207, transmission belt; 208, top cover; 209, feed. 210. Bucket; 211. Second motor; 211. Water outlet; 300. Spraying device; 301. Water pump; 302. Main water pipe; 303. Branch water pipe; 304. Spray pipe; 305. Spray hole; 400. Heating device; 401. Annular box; 402. Cavity; 403. Connecting pipe; 404. Circulation pipe; 405. Heating circulation pump; 501. Movable sleeve; 502. Fixed sleeve; 503. Baffle rod; 504. Spring; 505. Air hole. Detailed Implementation

[0038] See Figure 1-8 This embodiment discloses an automatic feeding device for plastic pipe production, including a lifting pipe 100 and a feeding box 200. A first spiral blade 104 is installed inside the lifting pipe 100 and is rotatably installed inside the lifting pipe 100. A second spiral blade 202 is provided inside the feeding box 200 and is rotatably installed on the inner wall of the feeding box 200. One end of the second spiral blade 202 extends to the bottom of the lifting pipe 100.

[0039] A spraying device 300 is installed on the top of the feed box 200, and the spraying device 300 sprays external water into the interior of the feed box 200.

[0040] The surface of the second spiral blade 202 is connected to a first stirring rod 203, which is used to stir the plastic material entering the feed box 200.

[0041] By adding plastic raw materials into the feed box 200 and rotating the second spiral blade 202, the plastic raw materials are screwed into the riser pipe 100. At the same time, water is sprayed above the second spiral blade 202 by the spraying device 300 to clean the plastic raw materials on the second spiral blade 202, thereby improving the purity of the finished plastic product.

[0042] like Figure 9 , Figure 10As shown, in one possible embodiment, a movable sleeve 501 is provided above the interior of the lifting pipe 100, a fixed sleeve 502 is fixedly connected to the inner wall of the lifting pipe 100, an annular groove is formed between the fixed sleeve 502 and the inner wall of the lifting pipe 100, the movable sleeve 501 is slidably connected to the interior of the annular groove, a spring 504 is connected between the bottom end of the movable sleeve 501 and the inner wall of the annular groove, a plurality of baffle rods 503 are connected to the inner wall of the movable sleeve 501, the baffle rods 503 are inclined, and an air hole 505 is opened on the side wall of the lifting pipe 100, the air hole 505 communicates with the interior of the annular groove, and the air hole 505 is connected to an air pump;

[0043] With the above scheme, when the material is lifted to the top, an external air pump is connected to inject gas into the interior of the annular groove, thereby causing the movable sleeve 501 to slide upward. When the air pump draws the gas out of the annular groove, the interior of the annular groove is depressurized. Under the action of the spring 504, the movable sleeve 501 slides downward. This process is repeated. Through the up and down sliding of the movable sleeve 501, the baffle rod 503 moves up and down, thereby breaking up the plastic material and preventing the plastic material from sticking together due to high temperature.

[0044] like Figure 4 As shown, in one possible embodiment, the lifting pipe 100 is inclined, and the top of the lifting pipe 100 is connected to the discharge pipe 101. The outlet of the discharge pipe 101 faces downward. The first spiral blade 104 has a through hole 105. By opening the through hole 105 on the first spiral blade 104, hot air can be blown onto the plastic material through the through hole 105 to better dissipate heat from the plastic material.

[0045] like Figure 2 As shown, in one possible embodiment, a first rotating shaft 103 is fixedly connected to the middle of the first spiral blade 104. The two ends of the first rotating shaft 103 are rotatably connected to the two ends of the lifting tube 100, respectively. A first motor 106 is connected to the top of the lifting tube 100. The output end of the first motor 106 is connected to the top end of the first rotating shaft 103. The gap between the edge of the first spiral blade 104 and the lifting tube 100 is smaller than the diameter of a single gram of plastic granules.

[0046] like Figure 3 As shown, in one possible embodiment, a heating wire 107 is fixedly installed inside the top of the lifting tube 100. The heating wire 107 is connected to an external power source. An air inlet 102 is opened at the top of the lifting tube 100. The air inlet 102 is connected to an external blower. The air generated by the blower is injected into the lifting tube 100 and blown towards the bottom of the lifting tube 100 through the heating wire 107.

[0047] By setting heating wire 107 and air inlet 102, when the first spiral blade 104 rotates and lifts the plastic material into the inside of the lifting tube 100, the blower allows air to enter the inside of the lifting tube 100 from the air inlet 102, and the air is heated into hot air by heating wire 107, thereby heating and drying the material inside the lifting tube 100.

[0048] like Figure 2 As shown, in one possible embodiment, a second rotating shaft 201 is fixedly connected to the middle of the second spiral blade 202. A second motor 210 is connected to one end of the second rotating shaft 201. One end of the second rotating shaft 201 is rotatably connected to the inner wall of the feed box 200, and the other end of the second rotating shaft 201 is rotatably connected to the inner wall of the lifting pipe 100.

[0049] like Figure 5 As shown, in one possible embodiment, a third rotating shaft 204 is provided inside the feed box 200. A second stirring rod 205 is connected to the outer wall of the third rotating shaft 204. Both ends of the third rotating shaft 204 are rotatably connected to the inner wall of the feed box 200. Both the ends of the third rotating shaft 204 and the second rotating shaft 201 are connected to a transmission wheel 206. The multiple transmission wheels 206 are connected to each other by a transmission belt 207. The third rotating shaft 204 and the second rotating shaft 201 rotate synchronously.

[0050] The plastic raw materials inside the feed box 200 are stirred by the simultaneous rotation of the third rotating shaft 204 and the second rotating shaft 201, and by the rotation of the first stirring rod 203 on the outer wall of the second rotating shaft 201 and the second stirring rod 205 on the outer wall of the third rotating shaft 204, so that each plastic raw material can be cleaned by the water mist sprayed by the spraying device 300.

[0051] like Figure 2 As shown, in one possible embodiment, a top cover 208 is installed on the top of the feed box 200. The top cover 208 is snapped onto the top of the feed box 200. A feed hopper 209 is provided at one end of the top cover 208, and a water outlet 211 is provided at one end of the bottom of the feed box 200. Wastewater from cleaning plastic raw materials can be discharged from the water outlet 211.

[0052] like Figure 7 As shown, in one possible embodiment, the spraying device 300 includes a water pump 301, the outlet of which is connected to a main water pipe 302, the bottom of which is connected to a branch water pipe 303, the bottom of which is connected to a spray pipe 304, and the bottom of which is provided with a spray hole 305. The spray hole 305 is located inside the feed box 200 and is aligned with the top of the second spiral blade 202.

[0053] The water pump 301 pressurizes the external water source and injects it into the main water pipe 302, the branch water pipe 303 and the spray pipe 304 in sequence. Finally, the water is sprayed from the spray hole 305 onto the top of the second spiral blade 202 to spray and clean the plastic raw material.

[0054] like Figure 8 As shown, in one possible embodiment, a heating device 400 is installed on the outside of the riser pipe 100. The heating device 400 includes an annular box 401, which is fixed to the outer wall of the riser pipe 100. A cavity 402 is formed around the annular box 401. A connecting pipe 403 is connected to the upper and lower ends of the cavity 402. The connecting pipe 403 forms an S-shaped channel around the cavity 402 of the annular box 401. A circulation pipe 404 is connected to the ends of two adjacent cavities 402. A heating circulation pump 405 is connected to the top of the circulation pipe 404. A heat-conducting liquid is injected into the cavity 402.

[0055] The heat-conducting liquid inside the S-shaped cavity is circulated and heated by the heating circulation pump 405, thereby allowing the high-temperature heat-conducting liquid to exchange heat with the inside of the riser tube 100, drying and heating the plastic raw material inside the riser tube 100, and improving the drying effect.

Claims

1. An automatic feeding device for plastic pipe production, comprising a lifting pipe (100) and a feeding box (200), characterized in that: A first spiral blade (104) is installed inside the lifting tube (100), and the first spiral blade (104) is rotatably installed inside the lifting tube (100). A second spiral blade (202) is provided inside the feed box (200), and the second spiral blade (202) is rotatably installed on the inner wall of the feed box (200). One end of the second spiral blade (202) extends to the bottom of the lifting tube (100). A spraying device (300) is installed on the top of the feed box (200), and the spraying device (300) sprays external water into the interior of the feed box (200); The surface of the second spiral blade (202) is connected to a first stirring rod (203), which is used to stir the plastic material entering the feed box (200); The feed box (200) is provided with a third rotating shaft (204) inside. The outer wall of the third rotating shaft (204) is connected to a second stirring rod (205). Both ends of the third rotating shaft (204) are rotatably connected to the inner wall of the feed box (200). The ends of the third rotating shaft (204) and the second rotating shaft (201) are both connected to a drive wheel (206). The multiple drive wheels (206) are connected to each other by a drive belt (207). The third rotating shaft (204) and the second rotating shaft (201) rotate synchronously. A movable sleeve (501) is provided above the inside of the lifting pipe (100). A fixed sleeve (502) is fixedly connected to the inner wall of the lifting pipe (100). An annular groove is formed between the fixed sleeve (502) and the inner wall of the lifting pipe (100). The movable sleeve (501) is slidably connected to the inside of the annular groove. A spring (504) is connected between the bottom end of the movable sleeve (501) and the inner wall of the annular groove. A plurality of baffle rods (503) are connected to the inner wall of the movable sleeve (501). The baffle rods (503) are inclined. An air hole (505) is opened on the side wall of the lifting pipe (100). The air hole (505) communicates with the inside of the annular groove.

2. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: The lifting pipe (100) is inclined, and the top of the lifting pipe (100) is connected to the discharge pipe (101). The outlet of the discharge pipe (101) faces downward, and the first spiral blade (104) has a through hole (105).

3. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: A first rotating shaft (103) is fixedly connected to the middle of the first spiral blade (104). The two ends of the first rotating shaft (103) are rotatably connected to the two ends of the lifting tube (100). A first motor (106) is connected to the top of the lifting tube (100). The output end of the first motor (106) is connected to the top end of the first rotating shaft (103). The gap between the edge of the first spiral blade (104) and the lifting tube (100) is smaller than the diameter of a single plastic particle.

4. The automatic feeding equipment for plastic pipe production according to claim 3, characterized in that: A heating wire (107) is fixedly installed inside the top of the lifting tube (100). The heating wire (107) is connected to an external power source. An air inlet (102) is opened at the top of the lifting tube (100). The air inlet (102) is connected to an external blower. The air generated by the blower is injected into the lifting tube (100) and blown to the bottom of the lifting tube (100) through the heating wire (107).

5. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: A second rotating shaft (201) is fixedly connected to the middle of the second spiral blade (202). One end of the second rotating shaft (201) is connected to a second motor (210). One end of the second rotating shaft (201) is rotatably connected to the inner wall of the feed box (200), and the other end of the second rotating shaft (201) is rotatably connected to the inner wall of the lifting pipe (100).

6. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: The top of the feed box (200) is equipped with a top cover (208), which is snapped onto the top of the feed box (200). A feed hopper (209) is provided at one end of the top cover (208), and a water outlet (211) is provided at one end of the bottom of the feed box (200).

7. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: The spraying device (300) includes a water pump (301), the outlet of which is connected to a main water pipe (302), the bottom of which is connected to a branch water pipe (303), the bottom of which is connected to a spray pipe (304), and the bottom of which is provided with a spray hole (305). The spray hole (305) is located inside the feed box (200) and is aligned with the top of the second spiral blade (202).

8. The automatic feeding equipment for plastic pipe production according to claim 1, characterized in that: A heating device (400) is installed on the outside of the riser pipe (100). The heating device (400) includes an annular box (401), which is fixed to the outer wall of the riser pipe (100). A cavity (402) is formed around the annular box (401). A connecting pipe (403) is connected to the upper and lower ends of the cavity (402). The connecting pipe (403) forms an S-shaped channel around the cavity (402) of the annular box (401). A circulation pipe (404) is connected to the ends of two adjacent cavities (402). A heating circulation pump (405) is connected to the top of the circulation pipe (404).

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