An integrated device for preprocessing raw materials used in the production of MPP cable protection pipes

Abstract

The present invention relates to the technical field of MPP cable protection pipe production equipment, specifically an integrated device for raw material preprocessing in the production of MPP cable protection pipes, including a fixed frame, an outer shell, a discharge pipe, a grinding assembly, a suction fan and a feeding assembly. The fixed frame is horizontally placed on the cement working ground, and the outer shell is fixedly installed on the top of the fixed frame. The discharge pipe is fixedly installed at the center position on the top of the outer shell. A suction fan is installed at the bent part of the discharge pipe, and the built-in fan blade of the suction fan is located at the center position inside the outer shell. A grinding assembly is concentrically installed inside the outer shell. An installation hole is opened at the center position on the bottom of the outer shell, and a feeding assembly for feeding the grinding assembly is installed in the installation hole. The feeding assembly includes a driving motor installed at the center position on the bottom of the fixed frame through a motor fixed frame, and a first feeding tray is fixedly installed at the output shaft end of the driving motor. The raw material preprocessing process of the present invention has integrity and high uniformity of processed products.

Description

Technical Field

[0001] The present invention relates to the technical field of MPP cable protection pipe production equipment, and specifically relates to an integrated device for pre-processing raw materials for the production of MPP cable protection pipes. Background Art

[0002] MPP cable protection pipes, also known as MPP power pipes, are mainly divided into excavation type and non-excavation type. MPP non-excavation pipes are also called MPP jacking pipes or pulling pipes. MPP cable protection pipes use modified polypropylene as the main raw material, and have the characteristics of high temperature resistance and external pressure resistance, and are suitable for pipe materials for high-voltage transmission line cables above 10KV.

[0003] The production processes of MPP cable protection pipes include extrusion, rotational molding, blow molding, etc. The materials used in the rotational molding process of MPP cable protection pipes are generally crushed into powder materials. These grades have good fluidity in the first stage of the molding cycle and can then crosslink to form good environmental stress cracking resistance and toughness. The rotational molding process can make MPP cable protection pipes have high impact resistance and small warpage, and its melt index range is generally 3-8, and it can also make the product melt and flow in the thermal cycle.

[0004] As the processing raw materials of MPP cable protection pipes, when leaving the factory, the modified polypropylene materials and additive materials such as toughening agents are all in the form of granules. When MPP cable protection pipe manufacturers use the rotational molding process for processing and production, they also need to perform pre-processing of raw materials such as grinding and stirring on the granular raw materials. The processing method is separate processing, that is, grinding and stirring are processed separately, which makes the entire raw material pretreatment cycle long and is not conducive to the efficient production of MPP cable pipes. At the same time, in the pre-processing process of raw material stirring, a single channel composed of a single screw is often used for mixing, resulting in a low overall uniformity. Summary of the Invention

[0005] Aiming at the problem that when MPP cable protection pipe manufacturers use the rotational molding process for processing and production, they use a separate processing method to pre-process raw materials, which makes the entire raw material pretreatment cycle long and is not conducive to the efficient production of MPP cable pipes. At the same time, in the pre-processing process of raw material stirring, a single channel composed of a single screw is often used for mixing, resulting in a low overall uniformity, the present invention provides an integrated device for pre-processing raw materials for the production of MPP cable protection pipes.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: An integrated device for preprocessing raw materials for the production of MPP cable protection pipes, comprising a fixing frame, an outer casing, a discharge pipe, a grinding assembly, a suction fan, and a feeding assembly. The fixing frame is horizontally placed on the cement working floor, and the outer casing is fixedly installed on the top of the fixing frame. The discharge pipe is fixedly installed at the center position on the top of the outer casing. A suction fan is installed at the bent part of the discharge pipe, and the built-in fan blade of the suction fan is located at the center position inside the outer casing. The grinding assembly is concentrically installed inside the outer casing. An installation hole is opened at the center position on the bottom of the outer casing, and a feeding assembly for feeding the grinding assembly is installed in the installation hole.

[0007] The feeding assembly includes a driving motor installed at the center position on the bottom of the fixing frame through a motor fixing frame. A first feeding tray is fixedly installed at the output shaft end of the driving motor. Support rods are fixedly installed at equal circumferential intervals on the top of the first feeding tray. The tops of several of the support rods are fixedly connected to a driving pipe. A first spiral feeding blade is fixedly installed on the outer wall of the driving pipe. A sealing pipe is sleeved outside the first spiral feeding blade, and the outer wall of the sealing pipe is connected to the bottom of the outer casing through a positioning plate. A second feeding tray is sleeved in the gap between the driving pipe and the first feeding tray and the sealing pipe. Part of the upper end surface of the second feeding tray is fixed to the outer wall of the bottom of the outer casing through a round rod. A first feeding port is formed at the gap between the upper end surface of the second feeding tray and the lower end surface of the sealing pipe, and a second feeding port is formed at the gap between the upper end surface of the first feeding tray and the lower end surface of the second feeding tray.

[0008] The grinding assembly includes a grinding cover fixedly installed concentrically at the bottom end inside the outer casing. At least two clamping plates are arranged longitudinally at equal intervals at the center position of the grinding cover. The clamping plates are fixed through a connecting rod among them. A sleeve hole is opened at the connection position between the center positions of several of the clamping plates and the sealing pipe. The inner wall of the sleeve hole contacts but is not connected to the outer wall of the sealing pipe. Grinding blocks are fixedly installed at equal circumferential intervals at the gap between the two clamping plates. Discharge holes are opened at the bottom corners of the grinding cover. The top of the clamping plate at the topmost position is connected to a driven shaft block through a fixing rod. The inner wall shape at the connection position between the grinding cover and the grinding blocks is the same as the shape of the grinding blocks. There is a gap between the grinding blocks and the grinding cover, and this gap is the grinding area.

[0009] A driving shaft is fixedly installed at the bottom of the built-in fan blade of the suction fan. One end of the driving shaft is connected to a driving shaft through a reducer, and the driving shaft and the driven shaft block are connected through a connecting piece.

[0010] Furthermore, a driving rod is fixedly installed at the center position at the bottom of the driven shaft block. A second spiral feeding blade is fixedly installed on the outer wall of the driving rod. A placement groove is opened at the center position of the first feeding tray, and the bottom end of the driving rod is located in the placement groove.

[0011] Further, a circular extension plate is welded to the top end face of the driving tube, and the radius of the circular extension plate is greater than the radius of the sealing tube.

[0012] Further, a magnet is installed at the center position of the connecting member. Ball shafts are fixedly installed at equal intervals in the circumferential direction of the inner wall of the grinding cover. A movable ball is embedded at the end of the ball shaft. A first single-arm rod is fixedly installed at the center position of the top of the movable ball. A magnetic ball head is installed at the end of the first single-arm rod. Dial plates are symmetrically installed at the center position of the outer wall of the first single-arm rod.

[0013] Further, a second single-arm rod is fixedly installed at the center position of the bottom of the movable ball. A scraper is fixedly installed at the bottom of the second single-arm rod, and the scraper is made of a soft material.

[0014] Further, the total mass of the second single-arm rod and the scraper is greater than the total mass of the first single-arm rod, the magnetic ball head and the dial plates.

[0015] Further, a baffle is welded to the outer edge of the first feeding tray, and the cross section of the baffle is C-shaped.

[0016] Further, several of the magnets and several of the magnetic ball heads are all in the same horizontal plane.

[0017] 1: An integrated device for preprocessing raw materials for the production of MPP cable protection pipes provided by the present invention is provided with components such as a grinding component and a feeding component. The present invention concentrates the grinding and stirring pretreatment processes of the raw materials in the outer shell, making the entire pretreatment process coherent and integrated, with a short processing cycle, which is beneficial to the efficient production of MPP cable pipes.

[0018] 2: An integrated device for preprocessing raw materials for the production of MPP cable protection pipes provided by the present invention, when conveying raw materials, can adopt a dual-channel method formed by the first spiral feeding blade and the second spiral feeding blade to feed the raw materials, that is, the modified polypropylene material and the toughening agent material of the raw materials are respectively input from the first feeding port and the second feeding port. The raw materials input from the second feeding port will fall from the top edge of the driving tube to the top of the clamping plate, so that the modified polypropylene material and the toughening agent material synchronously fall to the top of the clamping plate, achieving the effect of uniform feeding, that is, realizing the preliminary uniform feeding of the raw materials; at the same time, the present invention uses magnetic attraction as the driving force. During the continuous operation of the device, the first single-arm rod and the second single-arm rod reciprocally deflect, and the dial plates and the scraper respectively perform secondary stirring on the powdery raw materials and the granular raw materials, thereby further ensuring the uniformity of the raw materials after being ground into powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 is a three-dimensional view of the overall structure of the present invention;

[0021] Figure 2 is a partial cross-sectional view of the overall structure of the present invention Figure 1 ;

[0022] Figure 3 is a partial cross-sectional view of the overall structure of the present invention Figure 2 ;

[0023] Figure 4 is a partial cross-sectional view of the overall structure of the present invention Figure 3 ;

[0024] Figure 5 is a partial cross-sectional view of the overall structure of the present invention Figure 4 ;

[0025] Figure 6 is of the present invention Figure 4 a partially enlarged schematic view of area A therein;

[0026] Figure 7 is of the present invention Figure 5 a partially enlarged schematic view of area B therein;

[0027] Figure 8 is of the present invention Figure 4 a partially enlarged schematic view of area C therein;

[0028] Figure 9 is of the present invention Figure 4 a partially enlarged schematic view of area D therein;

[0029] In the figure: 1, fixing frame; 2, outer housing; 3, discharge pipe; 4, grinding assembly; 5, suction fan; 6, feeding assembly; 61, driving motor; 62, first feeding tray; 63, second feeding tray; 64, driving pipe; 65, sealing pipe; 66, first spiral feeding blade; 67, support rod; 41, grinding cover; 42, clamping plate; 43, grinding block; 44, sleeve hole; 45, discharge hole; 46, driven shaft block; 51, driving shaft; 52, driving shaft; 53, connecting member; 461a, driving rod; 462a, second spiral feeding blade; 641, circular extension plate; 531, magnet; 461, ball shaft; 462, movable ball; 463, first single-arm rod; 464, magnetic ball head; 465, dialing plate; 466, second single-arm rod; 467, scraping plate; 621, baffle plate. Detailed implementation manners

[0030] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0031] As Figures 1-9As shown in the figure, an integrated device for pre-processing raw materials used in the production of MPP cable protection pipes according to the present invention includes a fixing frame 1, an outer casing 2, a discharge pipe 3, a grinding assembly 4, a suction fan 5, and a feeding assembly 6. The fixing frame 1 is horizontally placed on a cement working floor. The top of the fixing frame 1 is fixedly installed with the outer casing 2. The discharge pipe 3 is fixedly installed at the center of the top of the outer casing 2. A suction fan 5 is installed at the bent part of the discharge pipe 3, and the built-in fan blade of the suction fan 5 is located at the center of the inner part of the outer casing 2. The grinding assembly 4 is concentrically installed inside the outer casing 2. An installation hole is opened at the center of the bottom of the outer casing 2, and a feeding assembly 6 for feeding the grinding assembly 4 is installed in the installation hole. The production raw materials of MPP cable protection pipes are generally composed of modified polypropylene materials and toughening agent materials, and both are in the form of granules when leaving the factory. Specifically, during operation, a receiving box (not shown in the figure) is placed directly below the discharge pipe 3. The feeding assembly 6 is used to add the production raw materials of MPP cable protection pipes into the grinding assembly 4. The granular raw materials are ground into powder by the grinding assembly 4. Then, the suction fan 5 is started, and the powder raw materials are sucked into the discharge pipe 3 by the suction provided by the working suction fan 5 and fall into the receiving box along the discharge pipe 3 for centralized collection. The collected powder raw materials can be poured into a processing mold to produce MPP cable protection pipes by rotational molding process;

[0032] The feeding assembly 6 includes a driving motor 61 installed at the center of the bottom of the fixing frame 1 through a motor fixing frame. The output shaft end of the driving motor 61 is fixedly installed with a first feeding tray 62. The top of the first feeding tray 62 is circumferentially and equidistantly fixedly installed with support rods 67. The tops of several support rods 67 are fixedly connected to a driving pipe 64. The outer wall of the driving pipe 64 is fixedly installed with a first spiral feeding blade 66. A sealing pipe 65 is sleeved outside the first spiral feeding blade 66, and the outer wall of the sealing pipe 65 is connected to the bottom of the outer casing 2 through a positioning plate. A second feeding tray 63 is sleeved at the gap between the outer wall of the driving pipe 64 and the first feeding tray 62 and the sealing pipe 65, and a part of the upper end surface of the second feeding tray 63 is fixed to the outer wall of the bottom of the outer casing 2 through a round rod. As Figures 1-5 shown, a first feeding port is formed at the gap between the upper end surface of the second feeding tray 63 and the lower end surface of the sealing pipe 65, and a second feeding port is formed at the gap between the upper end surface of the first feeding tray 62 and the lower end surface of the second feeding tray 63. Specifically, during operation, the operator starts the driving motor 61 and the suction fan 5 respectively, and adds the modified polypropylene material and the toughening agent material in the raw materials to the periphery of the first feeding port along the second feeding tray 63 at the same time. After the driving motor 61 works, it will drive the driving pipe 64 to rotate together through several support rods 67. The rotating driving pipe 64 will drive the first spiral feeding blade 66 to rotate together, and then the raw materials near the first feeding port are vertically fed by the rotating first spiral feeding blade 66;

[0033] The grinding assembly 4 includes a grinding cover 41 which is concentrically fixedly installed at the bottom end of the outer shell 2, at least two clamps 42 are arranged at a central position of the grinding cover 41 at equal longitudinal intervals, and a plurality of the clamps 42 are fixed by connecting rods, that is, when one of the clamps 42 rotates, the plurality of clamps 42 should be regarded as a whole and move synchronously, and sleeve holes 44 are provided at the connection between the center position of the plurality of clamps 42 and the sealing tube 65, the inner wall of the sleeve hole 44 is in contact with the outer wall of the sealing tube 65 but not connected, and grinding blocks 43 are fixedly installed at equal circumferential intervals in the gap between the two clamps 42, a discharge hole 45 is provided at the bottom corner of the grinding cover 41, and the top of the clamp 42 at the topmost position is connected to a driven shaft block 46 through a fixing rod, and the grinding cover 4 The shape of the inner wall at the connection position between 1 and the grinding block 43 is consistent with the shape of the grinding block 43. There is a gap between the grinding block 43 and the grinding cover, and the gap is the grinding area. A group of grinding areas are formed between the inner walls of the grinding cover 41 and the plurality of grinding blocks 43 in the same horizontal plane. The sealing tube 65 seals the periphery of the first spiral feeding blade 66, and the top sealing area of the sealing tube 65 extends to the top of the clamping plate 42 at the highest horizontal height. It can be understood that the top of the sealing tube 65 is the first discharge port, that is, when the raw material transported vertically moves to the top edge of the sealing tube 65, the raw material loses the sealing and blocking effect of the sealing tube 65, and the raw material there falls to the upper end surface of the clamping plate 42 at the highest point under the action of its own gravity, and then falls into the grinding area;

[0034] A driving shaft 51 is fixedly installed at the bottom of the built-in fan blades of the suction fan 5, and one end of the driving shaft 51 is connected to a driving shaft 52 through a reducer. The driving shaft 52 is connected to the driven shaft block 46 through a connecting piece 53. When working, the suction fan 5 enters the working state and drives the driving shaft 52 to rotate through the reducer. The speed of the driving shaft 52 is made smaller than the speed of the built-in fan blades of the suction fan 5 through the reducer, and the speed of the driving shaft 52 should match the speed of the driving motor 61. When the driving shaft 52 rotates, it drives the driven shaft block 46 through the connecting piece 53. 46 rotates, and after the driven shaft block 46 rotates, it drives the clamping plate 42 to rotate through the fixed rod. The rotating clamping plate 42 further drives the grinding block 43 to rotate. The rotating grinding block 43 contacts the raw materials in the grinding area, and squeezes the raw materials there and grinds them with the inner wall of the grinding cover 41, so that the granular raw materials are crushed into powder; the raw materials crushed into powder will fall into the vicinity of the discharge hole 45, and the suction force generated by the suction fan 5 when working will suck the powdered raw materials into the discharge pipe 3, and fall into the receiving box along the discharge pipe 3 for centralized collection.

[0035] It should be further noted that the grinding precision of the grinding areas at different horizontal levels, which can be understood as the difference in the clearance value between the grinding block 43 and the grinding cover 41. During actual installation, it is necessary to follow the arrangement order of the grinding precision from low to high from top to bottom, and at the same time, ensure that the grinding precision of the bottommost grinding area is the same as the product requirements during the rotational molding of the required raw materials.

[0036] Refer to Figures 5-7 In another embodiment, a driving rod 461a is fixedly installed at the center position of the bottom of the driven shaft block 46. A second spiral feeding blade 462a is fixedly installed on the outer wall of the driving rod 461a. A placement groove is formed at the center position of the first feeding tray 62. The bottom end of the driving rod 461a is located in the placement groove. When the driven shaft block 46 rotates, it drives the driving rod 461a to rotate. The rotating driving rod 461a then drives the second spiral feeding blade 462a to rotate. In this state, the inner wall of the driving tube 64 serves as a sealing surface to seal the periphery of the second spiral feeding blade 462a. When conveying raw materials, a dual-channel method formed by the first spiral feeding blade 66 and the second spiral feeding blade 462a can be adopted to feed the raw materials. That is, the modified polypropylene material and the toughening agent material of the raw materials are respectively input from the first feeding port and the second feeding port. The raw materials input from the second feeding port will fall from the top edge of the driving tube 64 to the top of the clamping plate 42, so that the modified polypropylene material and the toughening agent material fall onto the top of the clamping plate 42 synchronously, achieving the effect of uniform feeding, that is, realizing the preliminary uniform feeding of the raw materials.

[0037] Furthermore, in the raw material ratio of the MPP cable protection pipe, the dosage of the modified polypropylene material is higher than that of the toughening agent material. Taking the example that the rotational speeds of the first spiral feeding blade 66 and the second spiral feeding blade 462a are the same, due to the difference in the pipe diameters of the driving tube 64 and the sealing tube 65, the feeding rates of the first spiral feeding blade 66 and the second spiral feeding blade 462a per unit time are different. Therefore, in terms of material addition selection, the modified polypropylene material should be added to the channel with a faster rate, and the toughening agent material should be added to the channel with a slower rate.

[0038] Refer to Figures 4-7 A circular extension plate 641 is welded to the top end face of the driving tube 64, and the radius of the circular extension plate 641 is greater than the radius of the sealing tube 65. When the second spiral feeding blade 462a is feeding materials, the falling path of the raw materials will fall along the surface of the circular extension plate 641, thereby preventing the raw materials added by the second spiral feeding blade 462a from falling into the first spiral feeding blade 66.

[0039] Refer to Figure 5 、 Figure 6 、 Figure 8 and Figure 9, a magnet 531 is installed at the center position of the connecting member 53. Ball shafts 461 are fixedly installed at equal circumferential intervals on the inner wall of the grinding cover 41. An active ball 462 is embedded at the end of the ball shaft 461. A first single-arm rod 463 is fixedly installed at the center position of the top of the active ball 462. A magnetic ball head 464 is installed at the end of the first single-arm rod 463. Dial plates 465 are symmetrically installed at the center position of the outer wall of the first single-arm rod 463. During specific operation, when the connecting member 53 rotates, it will drive a plurality of the magnets 531 to rotate together. When a magnet 531 rotates to one side of the magnetic ball head 464, the magnet 531 exerts a certain attraction force on the magnetic ball head 464, causing the magnetic ball head 464 to tend to move towards the magnet 531. When the magnet 531 moves away from the magnetic ball head 464, the magnetic ball head 464 returns to its original position under its own gravity. That is, under the action of this attraction force, it deflects within the ball shaft 461 with the center of the ball of the active ball 462 as the center. The deflected first single-arm rod 463 drives the dial plate 465 to deflect, and the deflected dial plate 465 stirs the powdery raw materials, increasing the uniformity of the powdery raw material products.

[0040] It should be noted that the number of the magnets 531 is less than the number of the magnetic ball heads 464, reducing the contact frequency between the magnets 531 and the magnetic ball heads 464.

[0041] Refer to Figure 5 , Figure 6 , Figure 8 and Figure 9 , a second single-arm rod 466 is fixedly installed at the center position of the bottom of the active ball 462. A scraper 467 is fixedly installed at the bottom of the second single-arm rod 466, and the scraper 467 is made of a soft material. When the active ball 462 deflects, it drives the second single-arm rod 466 to deflect. The deflection of the second single-arm rod 466 drives the scraper 467 to deflect. After the scraper 467 deflects, it stirs the granular raw materials on the clamping plate 42, further ensuring the uniformity of the raw materials before entering the grinding area.

[0042] Refer to Figure 3 , the total mass of the second single-arm rod 466 and the scraper 467 is greater than the total mass of the first single-arm rod 463, the magnetic ball head 464 and the dial plates 465, ensuring that the overall center of the combination of the second single-arm rod 466 and the first single-arm rod 463 is lower when the present invention is not in the working state, that is, both the second single-arm rod 466 and the first single-arm rod 463 are in the vertical state.

[0043] Refer to Figure 2 , a baffle 621 is welded at the outer edge of the first feeding tray 62, and the cross-section of the baffle 621 is in a C shape. The raw materials are blocked by the baffle 621 to prevent the raw materials from falling along the outer edge of the first feeding tray 62 during feeding.

[0044] Refer to Figure 5 , several of the magnets 531 and several of the magnetic ball heads 464 are all located in the same horizontal plane, ensuring that each time the magnet 531 is displaced to one side of the magnetic ball head 464, the attraction point of the magnetic ball head 464 by the magnet 531 is located at the center of the magnetic ball head 464.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above-described embodiments and the descriptions in the specification are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An integrated device for preprocessing raw materials used in the production of MPP cable protection pipes, comprising a fixed frame (1), an outer shell (2), a discharge pipe (3), a grinding assembly (4), a suction fan (5) and a feeding assembly (6), characterized in that, The fixing frame (1) is horizontally placed on the cement working ground. A housing (2) is fixedly installed at the top of the fixing frame (1). A discharge pipe (3) is fixedly installed at the center of the top of the housing (2). An air suction fan (5) is installed at the bent part of the discharge pipe (3), and the built-in fan blade of the air suction fan (5) is located at the center of the housing (2). A grinding assembly (4) is concentrically installed inside the housing (2). An installation hole is opened at the center of the bottom of the housing (2), and a feeding assembly (6) for feeding the grinding assembly (4) is installed in the installation hole. The feeding assembly (6) includes a driving motor (61) installed at the center of the bottom of the fixing frame (1) through a motor fixing frame. A first feeding tray (62) is fixedly installed at the output shaft end of the driving motor (61). Support rods (67) are fixedly installed at equal circumferential intervals on the top of the first feeding tray (62). The tops of several support rods (67) are fixedly connected to a driving pipe (64). A first spiral feeding blade (66) is fixedly installed on the outer wall of the driving pipe (64). A sealing pipe (65) is sleeved outside the first spiral feeding blade (66), and the outer wall of the sealing pipe (65) is connected to the bottom of the housing (2) through a positioning plate. A second feeding tray (63) is sleeved on the outer wall of the driving pipe (64) at the gap between the first feeding tray (62) and the sealing pipe (65), and a part of the upper end surface of the second feeding tray (63) is fixed to the outer wall of the bottom of the housing (2) through a round rod. The grinding assembly (4) includes a grinding cover (41) concentrically and fixedly installed at the bottom end inside the housing (2). At least two clamping plates (42) are longitudinally arranged at equal intervals at the center of the grinding cover (41). The clamping plates (42) are fixed by connecting rods. Sleeve holes (44) are opened at the connection positions between the centers of several clamping plates (42) and the sealing pipe (65). The inner wall of the sleeve hole (44) contacts but is not connected to the outer wall of the sealing pipe (65). Grinding blocks (43) are fixedly installed at equal circumferential intervals at the gap between the two clamping plates (42). Discharge holes (45) are opened at the bottom corners of the grinding cover (41). The top of the clamping plate (42) at the topmost position is connected to a driven shaft block (46) through a fixing rod. A driving shaft (51) is fixedly installed at the bottom of the built-in fan blade of the air suction fan (5). One end of the driving shaft (51) is connected to a driving shaft (52) through a reducer, and the driving shaft (52) is connected to the driven shaft block (46) through a connecting member (53). A magnet (531) is installed at the center of the connecting member (53). Ball shafts (461) are fixedly installed at equal circumferential intervals on the inner wall of the grinding cover (41). A movable ball (462) is embedded at the end of the ball shaft (461). A first single-arm rod (463) is fixedly installed at the center of the top of the movable ball (462). A magnetic ball head (464) is installed at the end of the first single-arm rod (463). Dial plates (465) are symmetrically installed at the center of the outer wall of the first single-arm rod (463). A second single-arm rod (466) is fixedly installed at the center position of the bottom of the movable ball (462), a scraper (467) is fixedly installed at the bottom of the second single-arm rod (466), and the scraper (467) is made of a soft material.

2. The integrated device for pre-processing raw materials used in the production of MPP cable protection pipes according to claim 1, characterized in that , a driving rod (461a) is fixedly installed at the center position of the bottom of the driven shaft block (46), a second spiral feeding blade (462a) is fixedly installed on the outer wall of the driving rod (461a), a placing groove is formed at the center position of the first feeding tray (62), and the bottom end of the driving rod (461a) is located in the placing groove.

3. An integrated device for preprocessing raw materials for the production of MPP cable protection pipes according to claim 1, characterized in that , a circular extension plate (641) is welded to the top end face of the driving pipe (64), and the radius of the circular extension plate (641) is larger than the radius of the sealing pipe (65).

4. An integrated device for preprocessing raw materials for the production of MPP cable protection pipes according to claim 1, characterized in that, The total mass of the second single-arm rod (466) and the scraper (467) is greater than the total mass of the first single-arm rod (463), the magnetic ball head (464) and the dial (465).

5. An integrated device for preprocessing raw materials used in the production of MPP cable protection pipes according to claim 1, characterized in that, A baffle (621) is welded to the outer edge of the first feeding tray (62), and the cross section of the baffle (621) is C-shaped.

6. An integrated device for preprocessing raw materials for the production of MPP cable protection pipes according to claim 1, characterized in that, A plurality of the magnets (531) and a plurality of the magnetic ball heads (464) are all in the same horizontal plane.

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