An extrusion device for pipe production

Abstract

The present invention relates to the technical field of pipeline production, and specifically discloses an extrusion device for pipeline production, including a feed bin and two groups of feed hoppers connected thereto, the top surface of the feed bin is fixedly connected to a motor, the output end of the motor is fixedly connected to a rotating rod, the outer surface of the rotating rod is sleeved with a second screen, the top surface of the second screen is fixedly connected to a first screen; it also includes an inner cylinder fixedly connected to the bottom surface of the second screen, the interior of the inner cylinder is provided with a flipping assembly; it also includes an outer cylinder that rotates with the outer surface of the first screen. The present invention can screen the plastic particles put into the feed bin by setting the first screen and the second screen, small particles of plastic directly fall through the first screen, and large particles of plastic enter the second screen and fall into the inner cylinder, and the first screen and the second screen can be driven to rotate by controlling the motor, so that the falling plastic particles can fall more evenly, reducing the possibility of clogging the screen.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline production, and in particular to an extrusion device for pipeline production. Background Art

[0002] The extrusion molding process is also called extrusion molding, which is one of the commonly used plastic product production processes in industry. In the process of pipe production, the extrusion molding process is required for molding;

[0003] At present, China's invention patent announcement number CN117162439A discloses an extrusion device for cable production, which can crush larger particles that have not fallen from the filter hole, and then drop them from the feed pipe with standard or smaller particles, thereby improving resource utilization and increasing the number of particles entering at the same time, and does not require a separate drive, which is flexible and convenient;

[0004] However, at present, in the process of extrusion production, since the plastic particles put in are of different sizes, when the extruder heats and melts the plastic particles, the material with a small particle size melts first, while the material with a large particle size takes longer to melt than the material with a small particle size due to its larger volume. Therefore, in the same period of time, the state of the large particle plastic is different from that of the small particle plastic. After continued heating, the melted small particle plastic will melt after the large particle plastic. Some of the small particle plastic may be burnt due to overheating to form charred material, and intermittent char spots or even char blocks will appear in the extrusion process of the extruder, reducing the extrusion effect of the extruder. Summary of the invention

[0005] The object of the present invention is to provide an extrusion device for pipe production to solve the problem in the above background that due to the different sizes of plastic particles input, the time required for heating is different, which may cause the small particles of plastic to coke and affect the extrusion effect.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A plastic extrusion device for pipeline production comprises a feed bin and two groups of feed hoppers connected thereto, wherein a motor is fixedly connected to the top surface of the feed bin, a rotating rod is fixedly connected to the output end of the motor, a second screen is sleeved on the outer surface of the rotating rod, and a first screen is fixedly connected to the top surface of the second screen; an inner cylinder is fixedly connected to the bottom surface of the second screen, a flipping assembly is arranged inside the inner cylinder; an outer cylinder is rotationally matched with the outer surface of the first screen, a heating wire is arranged inside the outer cylinder; a baffle is slidably matched with the bottom surface of the outer cylinder, a side surface of the baffle is provided with a driving member for driving the movement of the baffle.

[0008] As a further solution of the present invention: the first screen is rotatably matched with the inner wall of the feed bin, and the aperture of the first screen is smaller than that of the second screen.

[0009] As a further solution of the present invention: the first screen is made of a flexible material, a plurality of groups of movable rods that can slide up and down are inserted inside the first screen, and two groups of limiting plates are sleeved on the outer surfaces of the movable rods.

[0010] As a further solution of the present invention: a sphere is provided on the bottom surface of the moving rod, and the sphere is rotatably matched with a spherical groove opened on the bottom surface of the moving rod, and multiple groups of fixing rings fixedly connected to the inner wall of the feed bin are provided on the lower side of the spheres, and multiple groups of sliding grooves are opened on the top surface of the fixing rings.

[0011] As a further solution of the present invention: a protective cover is provided on the upper side of the second screen, and the protective cover is sleeve-connected to the outer surface of the rotating rod.

[0012] As a further solution of the present invention: a discharge hopper is fixedly connected to the interior of the outer cylinder, and the discharge hopper is arranged inside the inner cylinder, and the outer surface of the outer cylinder is fixedly connected to the inner wall of the feed bin through two sets of fixing plates.

[0013] As a further solution of the present invention: the outer surface of the discharge hopper is rotatably matched with the inner wall of the inner tube, and the bottom surface of the discharge hopper is provided with a discharge port having the same diameter as the discharge hole.

[0014] As a further solution of the present invention: the turning assembly includes a threaded sleeve, and the outer surface of the threaded sleeve is fixedly connected to the inner wall of the inner cylinder through two groups of fixing rods, the inside of the threaded sleeve is meshedly connected with a threaded rod, and the outer surface of the threaded rod is fixedly connected to multiple groups of first stirring rods and second stirring rods, and the first stirring rods and the second stirring rods are respectively located on the upper and lower sides of the threaded sleeve.

[0015] As a further solution of the present invention: a limit rod is inserted into the bottom end of the threaded rod, and the top end of the limit rod is rotatably connected to the bottom end of the rotating rod, two sets of connecting rods are fixedly connected to the outer surface of the limit rod, and the ends of the connecting rods are fixedly connected to the inner wall of the discharge hopper.

[0016] As a further solution of the present invention: the driving member is configured as a cylinder, and the output end of the cylinder is fixedly connected to a side surface of the baffle, and the cylinder is fixedly installed on the bottom surface of one group of the fixed plates.

[0017] Beneficial effects of the present invention:

[0018] (1) The present invention can screen the plastic particles put into the feed bin by setting the first screen and the second screen. Small plastic particles directly fall through the first screen, and large plastic particles enter the second screen and fall into the inner cylinder. The first screen and the second screen can be driven to rotate by controlling the motor, so that the falling plastic particles can fall more evenly, reducing the possibility of clogging the screen.

[0019] (2) The present invention inserts a moving rod into the inner wall of the first screen, and two limit plates are fixedly connected to the outer side of the moving rod, so that when the first screen is rotating, the ball at the bottom of the moving rod cooperates with the sliding groove to make the moving rod move up and down. When the moving rod moves up and down, the limit plate moves accordingly. When the limit plate contacts the first screen, it applies force to it. Because the first screen is made of a flexible material, when the limit plate applies force to the first screen, the first screen will have a slight shaking process. Therefore, during the use of the first screen, it can be prevented that dust and other fine particles remain inside the screen hole and affect the subsequent screening effect;

[0020] (3) The present invention arranges the outer cylinder, the heating wire and the inner cylinder to cooperate, so that after a certain amount of large-particle plastic enters the inner cylinder and accumulates, the electric heating wire can be controlled to heat and preheat the large-particle plastic, and the inner cylinder rotates synchronously with the second screen, so that the internal particles can be heated more evenly during the heating process, and the extrusion effect can be improved by preheating the large-particle plastic;

[0021] (4) The present invention is provided with a flipping assembly, so that the threaded sleeve can be driven to rotate in the process of the motor driving the inner cylinder to rotate forward and backward. Since the limit rod and the connecting rod cooperate to limit the threaded rod in the vertical direction, the threaded rod can be moved in the vertical direction, and then the first stirring rod and the second stirring rod can be driven to flip the large-particle plastic rotating inside the inner cylinder back and forth, thereby increasing the heating effect of the large-particle plastic;

[0022] (5) The present invention sets a cylinder to drive the movement of the baffle plate, so that when the large plastic particles fall into the inner cylinder, the baffle plate can block the bottom surface of the inner cylinder, keeping the large plastic particles inside the inner cylinder. After the large plastic particles are preheated, the baffle plate is controlled to move by the cylinder to leak out the discharge hole, so that the large plastic particles fall from the inner cylinder, which can help the inner cylinder to accumulate large plastic particles and then heat them, avoiding the temperature increase of the outer cylinder after continuous heating, which causes the small plastic particles to be heated. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1It is a structural schematic diagram of the feed bin in the present invention;

[0025] Figure 2 It is a cross-sectional schematic diagram of the feed bin and its internal structure in the present invention;

[0026] Figure 3 The present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0027] Figure 4 The present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0028] Figure 5 It is a schematic diagram of the structure of the fixing ring and the sliding groove in the present invention;

[0029] Figure 6 It is an exploded schematic diagram of the internal structure of the feed bin in the present invention;

[0030] Figure 7 The present invention Figure 6 The enlarged schematic diagram at C in the middle;

[0031] Figure 8 It is a schematic diagram of the internal structure of the inner cylinder in the present invention;

[0032] Fig. 9 It is a schematic diagram of the overall structure of the present invention.

[0033] In the figure: 1. feed bin; 2. feed hopper; 3. motor; 301. rotating rod; 302. protective cover; 303. first screen; 3031. moving rod; 3032. limiting plate; 3033. sphere; 3034. fixing ring; 3035. sliding groove; 304. second screen; 4. inner cylinder; 5. threaded sleeve; 501. fixed rod; 502. threaded rod; 503. first stirring rod; 504. second stirring rod; 505. limiting rod; 506. connecting rod; 6. outer cylinder; 601. discharge hopper; 602. discharge hole; 7. heating wire; 8. baffle; 801. cylinder; 9. fixing plate; 10. extruder; 11. bottom plate. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1:

[0036] See also Figure 1-9As shown, the present invention is an extrusion device for pipe production, comprising a feed bin 1 and two groups of feed hoppers 2 connected thereto, the two feed hoppers 2 are symmetrically arranged, and when plastic particles are fed in, they can be fed in a split manner to increase the amount fed in at the same time and improve production efficiency. Fig. 9 As shown in the figure, the feed bin 1 is connected to the extruder 10, and the extruder 10 is fixedly mounted on the top surface of the bottom plate 11;

[0037] The top surface of the feed bin 1 is fixedly connected to a motor 3, and the motor 3 is set to rotate forward and reverse when in use. The motor 3 is fixedly connected to the top surface of the feed bin 1, and the output end of the motor 3 is fixedly connected to a rotating rod 301, and the rotating rod 301 extends to the inside of the feed bin 1 through the top surface of the feed bin 1, and the outer surface of the rotating rod 301 is sleeved with a second screen 304, and the second screen 304 is in a plane shape. The top surface of the second screen 304 is fixedly connected to a first screen 303, and the first screen 303 is in an inverted frustum, so that after the plastic particles fall from the feed hopper 2 to the top surface of the first screen 303, larger plastic particles can naturally slide to the top surface of the second screen 304 through the inclined surface, so as to avoid larger particles remaining on the upper side of the first screen 303 and affecting the subsequent falling plastic particles;

[0038] The first screen 303 is rotationally matched with the inner wall of the feed bin 1. By setting the first screen 303 and the feed bin 1 to be rotationally matched, the motor 3 can drive the rotating rod 301 to rotate, thereby driving the first screen 303 and the second screen 304 to rotate. During the rotation of the first screen 303 and the second screen 304, they are in a relative motion relationship with the feed hopper 2, so that the plastic particles can fall evenly onto the first screen 303, and the aperture of the first screen 303 is smaller than that of the second screen 304. By setting the aperture of the first screen 303 smaller than that of the second screen 304, the input plastic particles can be screened according to different sizes, so that larger plastic particles can be screened out for preheating treatment;

[0039] Through the above device, when plastic particles are added, smaller particles will fall through the first screen 303, and larger particles will slide through the inclined surface of the first screen 303 to the screen holes of the second screen 304 and fall into the inner cylinder 4. Moreover, since the first screen 303 and the second screen 304 rotate forward and reverse relative to the motor 3, the first screen 303 and the second screen 304 can be in a relative rotation state relative to the feed hopper 2, so that the falling can be more uniform, avoiding the blockage of the screen holes caused by particle accumulation.

[0040] Embodiment 2:

[0041] Based on the above-mentioned embodiment 1, the present invention is an extrusion device for pipe production, including a protective cover 302 arranged on the upper side of the second screen 304, the protective cover 302 is truncated, which is convenient for plastic particles to slide down the inclined surface to avoid blockage, and the area of ​​the bottom surface of the protective cover 302 is larger than the area of ​​the second screen 304, so that when the plastic particles fall, they can be prevented from falling directly to the upper side of the second screen 304, causing small particles of plastic to fall into the inner cylinder 4 and reduce the screening efficiency, and the protective cover 302 is sleeved and connected with the outer surface of the rotating rod 301, the rotating rod 301 provides support force for the protective cover 302, and when the rotating rod 301 rotates, the protective cover 302 and the second screen 304 can move synchronously;

[0042] The setting of the protective cover 302 can provide a certain degree of blocking for the falling plastic particles, preventing the plastic particles from falling directly on the upper side of the second screen 304 due to free fall during the falling process, causing small particles of plastic to fall into the inner cylinder 4 without being screened, thereby affecting the overall screening efficiency and heating efficiency.

[0043] Embodiment three:

[0044] Based on the above-mentioned embodiment 1, the present invention is an extrusion device for pipe production, which also includes a first screen 303 set to a flexible material, a plurality of groups of moving rods 3031 that can slide up and down are inserted inside the first screen 303, four moving rods 3031 are set, and they are respectively distributed in a circular array inside the first screen 303, and the outer surface of the moving rod 3031 is sleeved with two groups of limit plates 3032, and the two limit plates 3032 are respectively located at the upper and lower sides of the first screen 303, so that the first screen 303 can be forced in the upward direction and the downward direction during the upward and downward movement of the moving rod 3031, and then the first screen 303 can be slightly shaken while being subjected to force, and the dust and other particles retained in the sieve holes of the first screen 303 can be cleaned during the shaking process, thereby reducing the possibility of clogging the sieve holes due to long-term use;

[0045] The bottom surface of the moving rod 3031 is provided with a ball 3033, and the ball 3033 is rotatably matched with the spherical groove provided on the bottom surface of the moving rod 3031, and the ball 3033 is arranged to be easy to rotate. At the same time, during the rotation of the first screen 303, the ball 3033 is moved in coordination with the sliding groove 3035, and the contact area between the ball 3033 and the sliding groove 3035 is small, thereby making the friction force in the moving process smaller, and the lower side of the multiple groups of ball 3033 is provided with a fixing ring 3034 fixedly connected to the inner wall of the feed bin 1, and the top surface of the fixing ring 3034 is provided with multiple groups of sliding grooves 3035, and four groups of sliding grooves 3035 are arranged to be distributed in a circular array, and correspond to the moving rod 3031, and the sliding groove 3035 is arranged to be W-shaped, thereby making the moving rod 3031 move up and down in coordination with the shape of the sliding groove 3035;

[0046] When the motor 3 drives the first screen 303 and the second screen 304 to rotate, the moving rod 3031 slides with the inner wall of the first screen 303, and the sphere 3033 at the bottom of the moving rod 3031 cooperates with the outer surface of the sliding groove 3035. Since the sliding groove 3035 is W-shaped and uneven, the moving rod 3031 will move in the vertical direction, thereby driving the two limit plates 3032 to apply force to the first screen 303. Since the material of the first screen 303 is flexible and can be slightly deformed, the first screen 303 will shake during the rotation to prevent dust and other fine particles from remaining inside the screen hole and affecting the subsequent screening effect.

[0047] Embodiment 4:

[0048] Based on the above-mentioned embodiment 1 and embodiment 3, the present invention is an extrusion device for pipe production, further comprising an outer cylinder 6 that is rotatably matched with the outer surface of the first screen 303, so that when the first screen 303 rotates, the outer cylinder 6 is fixed, so that the relative rotation relationship between the heating wire 7 and the inner cylinder 4 can be achieved, and the inner part of the outer cylinder 6 is provided with a heating wire 7, which is fixed to the inner wall of the outer cylinder 6 in a threaded distribution, and the heating temperature of the heating wire 7 is much lower than the heating temperature of the internal heating unit of the extruder 10, so that it will not melt during the preheating process;

[0049] Among them, the inner part of the outer cylinder 6 is fixedly connected with a discharge hopper 601, and the discharge hopper 601 is set in an inverted frustum shape, which is convenient for the plastic particles to slide down, and the discharge hopper 601 is set inside the inner cylinder 4, and the outer surface of the discharge hopper 601 is rotatably matched with the inner wall of the inner cylinder 4, and the bottom surface of the discharge hopper 601 is provided with a discharge port with a diameter that is the same as the diameter of the discharge hole 602, and the outer surface of the outer cylinder 6 is fixedly connected to the inner wall of the feed bin 1 through two groups of fixing plates 9, and the cross section of the fixing plate 9 is set to be triangular, which is convenient for small plastic particles to slide down from its inclined surface;

[0050] It also includes a baffle 8 that is slidably matched with the bottom surface of the outer cylinder 6. The baffle 8 can block the discharge hole 602, so that the large particles of plastic are temporarily stored inside the inner cylinder 4. A driving member is provided on one side of the baffle 8 to drive the movement of the baffle 8. The driving member is set as a cylinder 801, and the output end of the cylinder 801 is fixedly connected to one side of the baffle 8. The cylinder 801 is fixedly installed on the bottom surface of one group of fixed plates 9. After the plastic particles inside the inner cylinder 4 are preheated, the baffle 8 is driven by the cylinder 801 to move, so that the discharge hole 602 leaks out and the plastic particles fall down. Therefore, the heating wire 7 can be controlled to heat after accumulating for a period of time, so as to avoid the external temperature of the outer cylinder 6 rising due to long-term heating, which affects the falling small particles of plastic.

[0051] After the first screen 303 and the second screen 304 screen the particles of different sizes, the larger plastic particles fall into the inner cylinder 4, and then the heating wire 7 is used to preheat the particles inside the inner cylinder 4 so that they have a certain temperature before falling into the extruder 10, so that the heating time of large and small particles is almost the same, reducing the possibility of coking and affecting the extrusion effect, and the inner cylinder 4 rotates with the second screen 304, so that the particles inside the inner cylinder 4 can rotate and tumble, thereby improving the heating efficiency.

[0052] Embodiment five:

[0053] Based on the above-mentioned fourth embodiment, the present invention is an extrusion device for pipe production, which further includes an inner cylinder 4 fixedly connected to the bottom surface of the second screen 304, so that large plastic particles can fall from the second screen 304 to the inside of the inner cylinder 4 for short-term storage, and a turning assembly is provided inside the inner cylinder 4. By providing the turning assembly, the plastic particles inside the inner cylinder 4 can be turned during the preheating process, thereby improving the heating efficiency and making the heating uniform;

[0054] The turning assembly includes a threaded sleeve 5, and the outer surface of the threaded sleeve 5 is fixedly connected to the inner wall of the inner cylinder 4 through two sets of fixing rods 501, so that the threaded sleeve 5 and the inner cylinder 4 can rotate synchronously, and the threaded sleeve 5 is internally meshed with a threaded rod 502, so that the threaded rod 502 can move in the vertical direction during the rotation of the threaded sleeve 5, and a limiting rod 505 is inserted into the bottom end of the threaded rod 502, and the top end of the limiting rod 505 is rotatably connected to the bottom end of the rotating rod 301, and the limiting rod 505 is configured to have a cylindrical top portion and a rectangular column at the bottom. The cylindrical part at the top is rotatably connected to the bottom end of the rotating rod 301, and the rectangular column at the bottom is inserted into the threaded rod 502, so that the threaded rod 502 can be limited in the vertical direction during the rotation of the threaded sleeve 5. Two groups of connecting rods 506 are fixedly connected to the outer surface of the limiting rod 505, and the ends of the connecting rods 506 are fixedly connected to the inner wall of the discharge hopper 601, so that the limiting rod 505 can be fixed by two connecting rods 506, and the cross-sections of the two connecting rods 506 are triangular, which is convenient for the plastic particles to slide and reduce the possibility of residue.

[0055] The outer surface of the threaded rod 502 is fixedly connected with a plurality of first stirring rods 503 and second stirring rods 504. The first stirring rods 503 and second stirring rods 504 are arranged in a circular array. The first stirring rods 503 and second stirring rods 504 are arranged alternately to improve the efficiency of stirring and turning. When the plastic particles inside the inner cylinder 4 are preheated, the plastic particles rotate with the inner cylinder 4, and the threaded rod 502 drives the first stirring rod 503 and second stirring rod 504 to move in the vertical direction, which can further improve the uniform heating efficiency of the plastic particles. The first stirring rod 503 and the second stirring rod 504 are respectively located on the upper side and the lower side of the threaded sleeve 5, so that the moving distance of the first stirring rod 503 is the upper side of the threaded sleeve 5, and the moving distance of the second stirring rod 504 is the lower side of the threaded sleeve 5, thereby increasing the overall turning distance.

[0056] Working principle of the present invention: When performing the extrusion process of pipeline production, the staff first controls the motor 3 to rotate forward and reverse, and puts the plastic particles into the feed bin 1 through the two feed hoppers 2. The plastic particles fall into the first screen 303, and the smaller particles fall into the extruder 10 through the mesh holes of the first screen 303. The larger particles slide through the first screen 303 to the second screen 304, and then fall into the inner cylinder 4 through the mesh holes of the second screen 304. In addition, since the first screen 303 and the second screen 304 rotate forward and reverse with respect to the motor 3, the falling can be made more uniform, and the blockage of the mesh holes caused by the accumulation of particles can be avoided.

[0057] Due to the resistance of the baffle 8, the inner cylinder 4 can accumulate larger plastic particles. When a certain amount of plastic particles is accumulated inside, the heating wire 7 is controlled to heat the inner cylinder 4 (the heating temperature of the heating wire 7 is much lower than the heating temperature of the heating unit inside the extruder 10). Since the inner cylinder 4 rotates forward and reversely with the second screen 304, while the outer cylinder 6 and the heating wire 7 are fixed, the large plastic particles inside the inner cylinder 4 can rotate relative to the heating wire 7, so that the heating is more uniform. When the heating is completed, the cylinder 801 is controlled to drive the baffle 8 to move. At this time, the preheated large plastic particles will fall into the inside of the extruder 10 through the discharge hole 602;

[0058] When the motor 3 drives the inner cylinder 4 to rotate forward and reverse, the threaded sleeve 5 inside it rotates forward and reverse synchronously. Since the limit rod 505 is fixed to the connecting rod 506, the limit rod 505 is rotatably connected to the rotating rod 301, and the connecting rod 506 is fixed to the discharge hopper 601. Since the discharge hopper 601 is fixed by the outer cylinder 6, the threaded rod 502 is limited in the vertical direction by the limit rod 505. While the threaded sleeve 5 rotates forward and reverse, the threaded rod 502 and the first stirring rod 503 and the second stirring rod 504 fixedly connected on its surface move back and forth in the vertical direction, so that the large particles of plastic inside can be turned over, thereby increasing the heating effect of the large particles of plastic and making the heating more uniform.

[0059] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An extrusion device for pipe production, comprising a feed bin (1) and two sets of feed hoppers (2) connected thereto, characterized in that: The top surface of the feed bin (1) is fixedly connected to a motor (3), the output end of the motor (3) is fixedly connected to a rotating rod (301), the outer surface of the rotating rod (301) is sleeved with a second screen (304), and the top surface of the second screen (304) is fixedly connected to the first screen (303); It also comprises an inner cylinder (4) fixedly connected to the bottom surface of the second screen (304), wherein a turning component for turning the plastic particles is arranged inside the inner cylinder (4); It also includes an outer cylinder (6) rotatably matched with the outer surface of the first screen (303), and a heating wire (7) is arranged inside the outer cylinder (6); It also includes a baffle (8) slidably matched with the bottom surface of the outer cylinder (6), and a driving member is provided on one side of the baffle (8) for driving the movement of the baffle (8); The first screen (303) is rotatably matched with the inner wall of the feed bin (1), and the aperture of the first screen (303) is smaller than that of the second screen (304); The first screen (303) is made of a flexible material, a plurality of groups of movable rods (3031) that can slide up and down are inserted inside the first screen (303), and two groups of limiting plates (3032) are sleeved on the outer surfaces of the movable rods (3031); The bottom surface of the moving rod (3031) is provided with a sphere (3033), and the sphere (3033) is rotatably matched with a spherical groove provided on the bottom surface of the moving rod (3031), and multiple groups of fixing rings (3034) fixedly connected to the inner wall of the feed bin (1) are provided on the lower side of the spheres (3033), and multiple groups of sliding grooves (3035) are provided on the top surface of the fixing rings (3034); The two limit plates (3032) are respectively located on the upper and lower sides of the first screen (303), so that the first screen (303) can be forced upward and downward when the moving rod (3031) moves up and down, and the first screen (303) can be slightly shaken while being subjected to the force. During the shaking process, dust and other particles remaining in the sieve holes of the first screen (303) can be cleaned, thereby reducing the possibility of clogging the sieve holes due to long-term use.

2. An extrusion device for pipe production according to claim 1, characterized in that: A protective cover (302) is provided on the upper side of the second screen (304), and the protective cover (302) is sleeve-connected to the outer surface of the rotating rod (301).

3. An extrusion device for pipe production according to claim 1, characterized in that: The outer cylinder (6) is fixedly connected to a discharge hopper (601) inside, and the discharge hopper (601) is arranged inside the inner cylinder (4). The outer surface of the outer cylinder (6) is fixedly connected to the inner wall of the feed bin (1) via two sets of fixing plates (9).

4. An extrusion device for pipe production according to claim 3, characterized in that: The outer surface of the discharge hopper (601) is rotatably matched with the inner wall of the inner cylinder (4), and the bottom surface of the discharge hopper (601) is provided with a discharge port having a diameter that is the same as the diameter of the discharge hole (602).

5. The extrusion device for pipe production according to claim 1, characterized in that: The turning assembly comprises a threaded sleeve (5), and the outer surface of the threaded sleeve (5) is fixedly connected to the inner wall of the inner cylinder (4) via two groups of fixing rods (501); the inside of the threaded sleeve (5) is meshingly connected with a threaded rod (502); the outer surface of the threaded rod (502) is fixedly connected with a plurality of groups of first stirring rods (503) and second stirring rods (504); and the first stirring rods (503) and the second stirring rods (504) are respectively located on the upper side and the lower side of the threaded sleeve (5).

6. An extrusion device for pipe production according to claim 5, characterized in that: A limiting rod (505) is inserted into the bottom end of the threaded rod (502), and the top end of the limiting rod (505) is rotatably connected to the bottom end of the rotating rod (301). Two groups of connecting rods (506) are fixedly connected to the outer surface of the limiting rod (505), and the ends of the connecting rods (506) are fixedly connected to the inner wall of the discharge hopper (601).

7. An extrusion device for pipe production according to claim 3, characterized in that: The driving member is configured as a cylinder (801), and the output end of the cylinder (801) is fixedly connected to a side surface of the baffle (8), and the cylinder (801) is fixedly mounted on the bottom surface of one set of the fixed plates (9).

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