Raw material pretreatment device for composite material processing

Abstract

The invention belongs to the technical field of material pretreatment equipment, and particularly relates to a raw material pretreatment device for composite material processing, which comprises a ball mill barrel and a steel ball discharge cover, and a ball screening ring frame for separating worn steel balls is fixedly arranged on the inner wall of the middle part of the ball mill barrel; the steel balls separated by the ball screening ring frame are intermittently discharged through the steel ball discharging cover; the interior of the ball mill barrel is divided by a flow guide disc and a partition plate to form a first-stage screen cavity, one end of the interior of the ball mill barrel is divided by the partition plate to form a second-stage screen cavity, and secondary materials and coarse materials are guided into the second-stage screen cavity through a feeding middle pipe to be screened; the lining plates are installed in the ball mill cylinder in an annular array mode, and the lining plates and the ball mill cylinder are assembled through the gap screw joint assembly. The broken steel balls can be automatically separated and discharged, the function of classifying and screening materials is achieved, and the dismounting difficulty of lining plate bolts is further reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of material pretreatment equipment, specifically relating to a raw material pretreatment device for composite material processing. Background Technology

[0002] A ball mill is a key piece of equipment used for material crushing. It uses grinding media (such as steel balls or steel rods) inside a rotating cylinder to impact and grind hard materials such as ores and cement raw materials, achieving dry or wet grinding. When the cylinder rotates, the grinding media adhere to the cylinder wall and rise under the action of centrifugal force. After reaching a certain height, they fall due to gravity, impacting and crushing the material. The rolling and sliding between the media generate a grinding effect, further refining the material.

[0003] Problems with existing technology: When broken steel balls (such as out-of-round or fractured balls) roll inside the mill, they cannot form an effective impact. Instead, they absorb the kinetic energy of other steel balls, resulting in a decrease in material crushing efficiency. In addition, when out-of-round steel balls rub against the liner, they slide instead of rolling, which accelerates the wear of the liner. Furthermore, during the replacement of the liner, the extrusion deformation between the liner bolts and the cylinder is quite severe, resulting in insufficient clearance for disassembly. Therefore, as the service time increases, the difficulty of disassembling and assembling the liner also increases. In addition, existing ball milling equipment can only perform ball milling and cannot perform screening functions, which means that the material needs to be sent to other equipment for screening after it is discharged, which will cause the material to be contaminated due to the transfer of processes. Summary of the Invention

[0004] The purpose of this invention is to provide a raw material pretreatment device for composite material processing, which can automatically complete the separation and discharge of broken steel balls, has the function of material classification and screening, and also reduces the difficulty of disassembling the liner bolts.

[0005] The specific technical solution adopted by this invention is as follows: A raw material pretreatment device for composite material processing includes: The ball mill cylinder and the steel ball discharge hood are movably sleeved on the outer surface of the middle part of the ball mill cylinder. The inner wall of the middle part of the ball mill cylinder is fixedly provided with a sieve ring frame for separating worn steel balls. The steel balls separated by the sieve ring frame are intermittently discharged through the steel ball discharge hood. The grading and screening assembly includes a guide plate and a partition plate. The inside of the ball mill cylinder is divided by the guide plate and the partition plate to form a primary screening chamber. One end of the inside of the ball mill cylinder is separated from the partition plate to form a secondary screening chamber. A feeding pipe is fixedly connected to the central axis of the guide plate. The end of the feeding pipe passes through the partition plate and extends into the secondary screening chamber. The powder after being screened by the guide plate enters the primary screening chamber. The secondary material and coarse material are introduced into the secondary screening chamber through the feeding pipe for screening. The ball mill cylinder is equipped with a gap screw connection assembly. The ball mill cylinder is internally arranged in a ring array with liners, and the liners are assembled with the ball mill cylinder through the gap screw connection assembly.

[0006] One end of the ball mill cylinder is fixedly connected to a feed pipe, and the other end of the ball mill cylinder away from the feed pipe is rotatably connected to a discharge pipe. One end of the discharge pipe extends into the interior of the secondary sieve chamber, and the end of the discharge pipe away from the ball mill cylinder is integrally provided with a discharge port. The discharge pipe is equipped with a rotating screw feeder II for discharging the coarse material after screening.

[0007] The screen ball ring frame has an integrally formed return ring frame on the side near the discharge pipe, and the return ring frame has an integrally formed inner support ring frame on the side near the discharge pipe. The inner wall of the ball mill cylinder is separated from the edge of the ball screen ring frame to form a ball dropping cavity. A ball guide bend is fixedly arranged in a ring array between the inner support ring frame and the inner wall of the ball mill cylinder. One end of the ball guide bend passes through the return ring frame and communicates with the inside of the ball dropping cavity. A ball guide baffle is fixedly arranged in a ring array inside the ball dropping cavity. The ball guide baffle is used to guide the steel balls falling into the ball dropping cavity into the ball guide bend when the ball mill cylinder rotates. The ball mill cylinder has ball outlet holes arranged in an array on the side wall in the middle section, and the end of each ball guide bend is connected to the corresponding ball outlet hole.

[0008] The outer wall of the ball mill cylinder is fixedly provided with longitudinal rails on both sides of the ball outlet hole, and sliders are slidably assembled on the surface of the longitudinal rails. The outer wall of the ball mill cylinder is fixedly provided with a wall-adhering rail at the position of the ball outlet hole. The two ends of the wall-mounted rail are slidably assembled with hole covers, and springs are connected between the inside of the hole covers and the outer wall of the ball mill cylinder. The two adjacent sliders are connected to a connecting rod at their opposite ends, and the end of the connecting rod is connected to the corresponding hole cover. The surface of each slider is fixedly provided with a support rod.

[0009] An operating shell is integrally provided on one side of the steel ball discharge hood. An operating shaft is rotatably assembled on the inner edge of the operating shell. Double threaded screws are rotatably assembled on both sides inside the operating shell. The double threaded screws are connected to the operating shaft through a sleeved chain drive. Both ends of the double threaded screws are screwed with screw tubes. A guide rod stop is connected between the two screw tubes located at the same end. The guide rod stops at both ends are arranged to bulge towards each other. When the support rod and the guide rod stop come into contact with each other, the corresponding two hole covers move in opposite directions and open the corresponding ball outlet hole.

[0010] The guide plate is fixedly installed inside the inner support ring frame, and a primary screen is embedded in the edge of the guide plate in an array. The primary screen is used to screen and separate the powder.

[0011] The ball mill cylinder has two through holes arranged in an array in the secondary sieve cavity. The through holes are used to allow secondary material to pass through. The inner wall of the ball mill cylinder at the secondary sieve cavity position is fixedly welded with two flow guides in an array. The flow guides are used to guide the coarse material into the interior of the discharge pipe.

[0012] A grading discharge hood is movably fitted at one end of the ball mill cylinder. A powder outlet is provided at the bottom of the grading discharge hood, corresponding to the position of the primary sieve cavity, and a secondary material outlet is provided at the bottom of the grading discharge hood, corresponding to the position of the secondary sieve cavity.

[0013] The gap screw assembly includes a bolt, a sleeve, a tapered tube, and a nut. The bolt passes through the liner and the ball mill cylinder. The sleeve is fitted on the outer surface of the bolt, and one side of the sleeve is integrally connected with a locking flap in a ring array. The locking flap passes through the liner and the ball mill cylinder.

[0014] The tapered tube is sleeved on the end of the bolt, and the tapered end of the tapered tube is inserted into the gap between the locking disc and the bolt. The locking disc deforms due to compression and its end is stuck on the outer wall of the ball mill cylinder. The nut is screwed to the end of the bolt, and a sealing gasket and a washer are provided between the nut and the tapered tube.

[0015] The technical effects achieved by this invention are as follows: (1) The ball mill designed in this invention, through the built-in sieve ball ring frame and the external steel ball discharge cover, realizes the automatic separation and discharge of broken steel balls without stopping the machine, which facilitates the maintenance of the equipment. Timely discharge of broken steel balls can solve the problem that the broken steel balls cannot form an effective impact when rolling in the mill, which leads to a decrease in material crushing efficiency. At the same time, it indirectly alleviates the wear of the liner. In addition, each set of hole covers can be automatically opened and the broken steel balls can be released when it moves to the position of the operating shell, which has the advantage of automation. The discharge of steel balls can also be selectively opened according to the actual situation.

[0016] (2) The ball mill equipment designed in this invention has the function of material classification and screening. The screening process also uses the rotation process of the ball mill cylinder as power. This multi-functional integrated design integrates ball milling and screening linkage technology to achieve "graded material upon discharge" and reduce process transfer pollution (such as integrating negative pressure dust removal and particle size separator).

[0017] (3) The gap screw assembly designed in this invention can create a certain gap between the bolt and the liner and cylinder when the bolt is removed, which facilitates the bolt disassembly and reduces the difficulty of bolt disassembly. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the raw material pretreatment apparatus provided in an embodiment of the present invention; Figure 2This is a cross-sectional structural diagram of the ball mill cylinder provided in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of the structure at point A in the middle; Figure 4 This is a top view of the internal structure of the steel ball discharge hood provided in an embodiment of the present invention; Figure 5 yes Figure 4 A magnified view of the structure at point B in the middle; Figure 6 This is a side view of the internal structure of the steel ball discharge hood provided in an embodiment of the present invention; Figure 7 yes Figure 6 A magnified view of the structure at point C in the middle; Figure 8 This is a cross-sectional view of the hole cover provided in an embodiment of the present invention; Figure 9 This is a cross-sectional view of the installation structure of the liner provided in an embodiment of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Base frame; 2. Support base; 3. Ball mill cylinder; 301. Screen ball ring frame; 302. Ball drop chamber; 303. Return material ring frame; 304. Inner support ring frame; 305. Guide plate; 306. Primary screen; 307. Raised bar; 308. Primary screen cavity; 309. Baffle plate; 310. Secondary screen cavity; 311. Guide ball bend; 312. Ball guide baffle; 313. Material hole one; 314. Material hole two; 315. Guide baffle one; 316. Feeding pipe; 317. Guide baffle two; 318. Ball outlet hole; 4. Feed pipe; 401. Screw feeder one; 5. Power mechanism; 6. Discharge pipe; 601. Discharge port; 602. Screw feeder II; 7. Steel ball discharge hood; 701. Ball raceway; 702. Ball outlet; 703. Operating housing; 704. Longitudinal rail; 705. Slider; 706. Connecting rod; 707. Wall-mounted rail; 708. Hole cover; 709. Support rod; 710. Operating shaft; 711. Double threaded screw; 712. Chain; 713. Screw tube; 714. Guide rod stop; 715. Spring; 8. Grading discharge hood; 801. Powder outlet; 802. Secondary material outlet; 9. Liner; 901. Bolt; 902. Sleeve; 903. Locking flap; 904. Conical tube; 905. Sealing gasket; 906. Washer; 907. Nut. Detailed Implementation

[0020] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0021] like Figures 1-9 As shown, a raw material pretreatment device for composite material processing includes a base frame 1 and a ball mill cylinder 3; See attached document Figure 1 and Figure 2 Both ends of the base frame 1 are equipped with support seats 2. One end of the ball mill cylinder 3 is fixedly connected to the feed pipe 4. The end of the ball mill cylinder 3 away from the feed pipe 4 is rotatably connected to the discharge pipe 6. The feed pipe 4 and the support seat 2 at one end form a rotating assembly, and the discharge pipe 6 and the support seat 2 at the other end form a fixed assembly. One end of the base frame 1 is fixedly equipped with a power mechanism 5, which consists of a motor and a reducer. The output end of the power mechanism 5 is connected to the feed pipe 4 through a synchronous belt drive. The inner wall of the feed pipe 4 is fixedly equipped with a screw feeder 401, which is used to introduce raw materials into the interior of the ball mill cylinder 3.

[0022] According to the above structure, the motor inside the power mechanism 5 works, and after being reduced in speed by the reducer, it synchronously drives the ball mill cylinder 3 to rotate. The feed pipe 4 rotates synchronously with the ball mill cylinder 3, and the ball mill cylinder 3 and the discharge pipe 6 rotate relative to each other. The raw material is fed into the feed pipe 4 and sent into the ball mill cylinder 3 through the screw feeder 401. After the raw material is milled inside the ball mill cylinder 3, it forms small particles and is discharged. The above process is all existing technology and will not be described in detail here.

[0023] Example 1: See attached document Figures 2-5 and Figures 7-8 A ball mill cylinder 3 has a screen ring frame 301 fixedly installed on the inner wall of the middle section for separating wear steel balls. A return ring frame 303 is integrally installed on the side of the screen ring frame 301 near the discharge pipe 6. An inner support ring frame 304 is integrally installed on the side of the return ring frame 303 near the discharge pipe 6. The inner wall of the ball mill cylinder 3 and the edge of the screen ring frame 301 are separated to form a ball drop cavity 302. Guide balls are fixedly arranged in a ring array between the inner support ring frame 304 and the inner wall of the ball mill cylinder 3. The ball guide bend 311 has one end that passes through the return ring frame 303 and communicates with the inside of the ball drop chamber 302. The ball drop chamber 302 is fixedly arranged in a ring array with ball guide baffles 312. The ball guide baffles 312 are used to guide the steel balls falling into the ball drop chamber 302 into the ball guide bend 311 when the ball mill cylinder 3 rotates. The side wall of the middle part of the ball mill cylinder 3 is provided with ball outlet holes 318 in an array. The end of each ball guide bend 311 is connected to the corresponding ball outlet hole 318. See attached document Figure 3 and Figure 5 The part of the ball guide baffle 312 that fits against the inner wall of the ball mill cylinder 3 has a material hole 313, and the part of the side wall of the concave part of the ball guide bend 311 that is located inside the return ring 303 has a material hole 314.

[0024] According to the above structure, the steel balls inside the ball mill cylinder 3 continuously fall from a high place to a low place, and achieve the effect of crushing raw materials through the impact with the material. However, the steel balls will also be damaged or split during this process. When the damaged steel balls reach a size large enough to pass through the sieve ball ring frame 301, they will roll along the inner side of the sieve ball ring frame 301 and pass through the sieve ball ring frame 301. At this time, the penetration point is located at the bottom. Furthermore, as the ball mill cylinder 3 continues to rotate, the steel ball will come into contact with the corresponding ball guide baffle 312 and roll into the corresponding ball guide bend 311 under its guidance. The position where the steel ball rolls into the ball guide bend 311 occurs near the lower side. As the ball mill cylinder 3 continues to rotate, the steel ball rolls along the ball guide bend 311 to the end near the ball outlet 318. During this process, the raw material carried by the ball guide baffle 312 will return to the bottom of the cylinder through the first material hole 313, and the raw material carried into the ball guide bend 311 will also return to the bottom of the cylinder through the second material hole 314 and the return ring 303, which can prevent the raw material from being discharged from the ball outlet 318.

[0025] See attached document Figures 2-3 The steel ball discharge hood 7 is movably sleeved on the outer surface of the middle part of the ball mill cylinder 3. The steel balls separated by the sieve ball ring frame 301 are intermittently discharged through the steel ball discharge hood 7. The middle of the inner wall of the steel ball discharge hood 7 is integrally provided with a ball raceway 701, and the ball raceway 701 and all the ball outlet holes 318 are in the same circular cross section. The bottom of the steel ball discharge hood 7 is integrally provided with a ball outlet 702 that communicates with the ball raceway 701. See attached document Figures 5-8 The outer wall of the ball mill cylinder 3 is fixedly provided with longitudinal rails 704 on both sides of the ball outlet hole 318, and sliders 705 are slidably assembled on the surface of the longitudinal rails 704. The outer wall of the ball mill cylinder 3 is fixedly provided with a wall-adhering rail 707 at the position of the ball outlet hole 318. The two ends of the wall-adhering rail 707 are slidably assembled with hole covers 708, and springs 715 are connected between the inside of the hole cover 708 and the outer wall of the ball mill cylinder 3. The opposite ends of two adjacent sliders 705 are connected with connecting rods 706, and the end of the connecting rods 706 is connected to the corresponding hole cover 708. Support rods 709 are fixedly provided on the surface of the sliders 705. See attached document Figures 6-7An operating shell 703 is integrally provided on one side of the steel ball discharge cover 7. An operating shaft 710 is rotatably assembled on the edge inside the operating shell 703. Double threaded screws 711 are rotatably assembled on both sides inside the operating shell 703. The double threaded screws 711 and the operating shaft 710 are connected by a chain 712. Both ends of the double threaded screws 711 are screwed with screw tubes 713. The two screw tubes 713 located at the same end are connected together by a guide rod stop 714. The guide rod stops 714 at both ends are arranged to bulge towards each other. When the support rod 709 and the guide rod stop 714 are pressed into contact, the corresponding two hole covers 708 move in opposite directions and open the corresponding ball discharge hole 318.

[0026] According to the above structure, when the ball guide tube 311 moves to the position of the operating shell 703 following the rotation of the ball mill cylinder 3, the support rod 709 will come into contact with the guide rod stop 714. The two sliders 705 on both sides will move towards each other, and the two hole covers 708 will move in opposite directions under the connection of the connecting rod 706 and open the corresponding ball outlet hole 318. At this time, the steel balls inside the ball guide tube 311 can pass through the ball outlet hole 318 and fall directly into the ball raceway 701. They will roll along the ball raceway 701 to the ball outlet 702 at the bottom and be discharged. This achieves the automatic screening and discharge of broken steel balls. For the replenishment of steel balls, the observation window of the ball mill cylinder 3 can be opened and new steel balls can be added. Furthermore, when the steel ball discharge function is not required, i.e. in the early stage of equipment use, it is only necessary to manually control the rotation of the operating shaft 710. It drives the two double-threaded screws 711 to rotate synchronously through the chain 712. By means of the screw connection between the screw and the screw tube 713, the two guide rod stops 714 are controlled to move away from each other, so that the support rod 709 at each ball outlet hole 318 position will not be squeezed and contacted with the guide rod stop 714, and the hole cover 708 of each group will not be opened at the operating shell 703. The above process, with the built-in screen ball ring frame 301 and the external steel ball discharge cover 7, enables the automatic separation and discharge of broken steel balls without stopping the machine. This facilitates equipment maintenance and timely discharge of broken steel balls, solving the problem that broken steel balls cannot form an effective impact when rolling in the mill, leading to a decrease in material crushing efficiency. It also indirectly reduces the wear of the liner. In addition, each set of hole covers 708 can automatically open and release broken steel balls when it moves to the position of the operating shell 703, which has the advantage of automation. The discharge of steel balls can also be selectively opened according to the actual situation.

[0027] The working principle of this invention is as follows: when the broken steel ball reaches a size large enough to pass through the sieve ball ring frame 301, it will roll along the inner side of the sieve ball ring frame 301 and pass through the sieve ball ring frame 301. At this time, the penetration point is located at the bottom. As the ball mill cylinder 3 continues to rotate, the steel ball will contact the corresponding ball guide baffle 312 and roll into the corresponding ball guide bend 311 under its guidance. The position where the steel ball rolls into the ball guide bend 311 occurs near the lower side. As the ball mill cylinder 3 continues to rotate, the steel ball rolls along the ball guide bend 311 to the end near the ball outlet hole 318. When the ball guide tube 311 moves to the operating shell 703 position as the ball mill cylinder 3 rotates, the support rod 709 will come into contact with the guide rod stop 714. The two sliders 705 on both sides will move towards each other, and the two hole covers 708 will move in opposite directions under the connection of the connecting rod 706 and open the corresponding ball outlet hole 318. At this time, the steel balls inside the ball guide tube 311 can pass through the ball outlet hole 318 and fall directly into the ball raceway 701. They will roll along the ball raceway 701 to the ball outlet 702 at the bottom and be discharged. This achieves the automatic screening and discharge of broken steel balls. For the replenishment of steel balls, the observation window of the ball mill cylinder 3 can be opened and new steel balls can be added.

[0028] Example 2: See attached document Figure 2 One end of the discharge pipe 6 extends into the interior of the secondary screen cavity 310, and the end of the discharge pipe 6 away from the ball mill cylinder 3 is integrally provided with a discharge port 601. The discharge pipe 6 is equipped with a rotating screw feeder 602 inside, which is used to discharge the coarse material after screening.

[0029] See attached document Figure 2 The grading and screening assembly includes a guide plate 305 and a partition plate 309. The ball mill cylinder 3 is divided by the guide plate 305 and the partition plate 309 to form a primary screening chamber 308. One end of the ball mill cylinder 3 is separated from the partition plate 309 to form a secondary screening chamber 310. A feeding pipe 316 is fixedly connected to the central axis of the guide plate 305. The end of the feeding pipe 316 passes through the partition plate 309 and extends into the secondary screening chamber 310. The powder after being screened by the guide plate 305 enters the primary screening chamber 308. The secondary and coarse materials are introduced into the secondary screening chamber 310 through the feeding pipe 316 for screening. See attached document Figures 2-3The guide plate 305 is fixedly installed inside the inner support ring 304. A primary screen 306 is embedded in the edge of the guide plate 305 in an array. The primary screen 306 is used to screen and separate the powder. The surface of the guide plate 305 is fixedly provided with a ring array of protrusions 307. The ball mill barrel 3 has an array of through holes in the part of the primary screen cavity 308 near the partition plate 309. The inner wall of the ball mill barrel 3 at the position of the primary screen cavity 308 is fixedly welded with a guide baffle 315 in an array. The guide baffle 315 is used to guide the powder to the through hole. See attached document Figure 2 The ball mill cylinder 3 has a series of through holes in the secondary screen cavity 310. The through holes are used to allow secondary material to pass through. The inner wall of the ball mill cylinder 3 at the position of the secondary screen cavity 310 is fixedly welded with a series of guide baffles 317. The guide baffles 317 are used to guide the coarse material into the interior of the discharge pipe 6. See attached document Figure 2 A grading discharge hood 8 is movably fitted at one end of the ball mill cylinder 3. A powder outlet 801 is provided at the bottom of the grading discharge hood 8 and at the position corresponding to the primary sieve cavity 308. A secondary material outlet 802 is provided at the bottom of the grading discharge hood 8 and at the position corresponding to the secondary sieve cavity 310.

[0030] According to the above structure, after the raw materials are crushed by ball milling, they are mainly divided into powder with smaller particles, secondary material with slightly larger particles, and coarse material with larger particles. When the material comes into contact with the guide plate 305, the powder will pass through the primary screen 306 and enter the primary screen cavity 308, and be guided by the guide baffle 315 to the through hole 1, and finally discharged through the powder outlet 801. The secondary material and coarse material will enter the feeding tube 316 under the drive of the convex strip 307, and be transported to the secondary screen cavity 310 by the screw feeder 3 in the feeding tube 316. The secondary material will pass through the through hole 2 and be discharged through the secondary material outlet 802, while the material remaining inside the secondary screen cavity 310 will be discharged. The coarse material is guided to the discharge pipe 6 by the guide baffle 317 and finally transported to the discharge port 601 and discharged by the rotating screw feeder 602. The screw feeder 602 is connected to an external power device. The coarse material discharged through the discharge port 601 can be put back into the equipment for crushing. The above process enables the ball mill equipment to have the function of material classification and screening at the same time. The screening process also uses the rotation of the ball mill cylinder 3 as power. This multi-functional integrated design integrates ball milling and screening linkage technology to achieve "discharge is classification" and reduce process transfer pollution such as integrating negative pressure dust removal and particle size separator.

[0031] The working principle of this invention is as follows: When the material comes into contact with the guide plate 305, the powder will pass through the primary screen 306 and enter the primary screen cavity 308, and be guided by the guide baffle 315 to the through hole 1, and finally discharged through the powder outlet 801; the secondary material and coarse material will enter the feeding tube 316 under the drive of the protrusion 307, and be transported to the secondary screen cavity 310 by the screw feeder 3 in the feeding tube 316. The secondary material will pass through the through hole 2 and be discharged from the secondary material outlet 802. The coarse material remaining in the secondary screen cavity 310 will be guided by the guide baffle 317 to the discharge pipe 6, and finally transported to the discharge port 601 and discharged by the rotating screw feeder 602.

[0032] Example 3: See attached document Figure 9 The ball mill cylinder 3 is equipped with a liner plate 9 in a ring array inside the ball mill cylinder 3, and the liner plate 9 is assembled with the ball mill cylinder 3 through a gap screw connection assembly. See attached document Figure 9 The gap screw connection assembly includes a bolt 901, a sleeve 902, a tapered tube 904, and a nut 907. The bolt 901 passes through the liner 9 and the ball mill cylinder 3. The sleeve 902 is fitted on the outer surface of the bolt 901, and a locking flap 903 is integrally connected in a ring array on one side of the sleeve 902. The locking flap 903 passes through the liner 9 and the ball mill cylinder 3. See attached document Figure 9 The tapered tube 904 is sleeved on the end of the bolt 901, and the tapered end of the tapered tube 904 is inserted into the gap between the locking disc 903 and the bolt 901. The locking disc 903 is deformed due to compression and its end is stuck on the outer wall of the ball mill cylinder 3. The nut 907 is screwed to the end of the bolt 901, and a sealing gasket 905 and a washer 906 are provided between the nut 907 and the tapered tube 904.

[0033] According to the above structure, during the installation of the liner 9, the sleeve 902 is first placed on the surface of the bolt 901 and then passed through the hole together. The tapered tube 904 is then placed on the other end of the bolt 901. Finally, the nut 907 is tightened. The nut 907 compresses the tapered tube 904, and the conical end of the tapered tube 904 is inserted into the gap between the locking disc 903 and the bolt 901. This causes the locking disc 903 to deform due to compression, and its end engages with the outer wall of the ball mill cylinder 3, thus completing the installation. During the disassembly of the liner 9, the sleeve 902 is first removed... Remove nut 907, then remove washer 906 and sealing gasket 905, and then pull out tapered tube 904 to restore the original gap between each locking disc 903 and bolt 901. Then gently tap each locking disc 903 to bring them together and restore them to their original state, and the entire bolt 901 can be easily removed. In the above process, this gap screw assembly can maintain a certain gap between bolt 901 and liner 9 and cylinder when bolt 901 is removed, which facilitates the disassembly of bolt 901 and reduces the difficulty of disassembling bolt 901.

[0034] The working principle of this invention is as follows: During the process of disassembling the liner plate 9, first remove the nut 907, then remove the washer 906 and the sealing gasket 905, and then pull out the tapered tube 904 to restore the original gap between each locking petal 903 and the bolt 901. Then gently tap each locking petal 903 to bring them together and restore them to their original state, and then the entire bolt 901 can be easily removed.

[0035] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A raw material pretreatment device for composite material processing, characterized in that, include: The ball mill cylinder (3) and the steel ball discharge hood (7) are movably sleeved on the outer surface of the middle part of the ball mill cylinder (3). The inner wall of the middle part of the ball mill cylinder (3) is fixedly provided with a sieve ring frame (301) for separating the worn steel balls. The steel balls separated by the sieve ring frame (301) are intermittently discharged through the steel ball discharge hood (7). The grading and screening assembly includes a guide plate (305) and a partition plate (309). The ball mill cylinder (3) is divided by the guide plate (305) and the partition plate (309) to form a primary screening chamber (308). One end of the ball mill cylinder (3) is separated from the partition plate (309) to form a secondary screening chamber (310). A feeding pipe (316) is fixedly connected to the central axis of the guide plate (305). The end of the feeding pipe (316) passes through the partition plate (309) and extends into the secondary screening chamber (310). The powder after being screened by the guide plate (305) enters the primary screening chamber (308). The secondary material and coarse material are introduced into the secondary screening chamber (310) through the feeding pipe (316) for screening. The ball mill cylinder (3) is equipped with a liner (9) arranged in a ring array inside the ball mill cylinder (3), and the liner (9) is assembled with the ball mill cylinder (3) through the gap screw connection assembly.

2. The raw material pretreatment device for composite material processing according to claim 1, characterized in that: One end of the ball mill cylinder (3) is fixedly connected to the feed pipe (4), and the other end of the ball mill cylinder (3) away from the feed pipe (4) is rotatably connected to the discharge pipe (6). One end of the discharge pipe (6) extends into the interior of the secondary sieve cavity (310), and the end of the discharge pipe (6) away from the ball mill cylinder (3) is integrally provided with a discharge port (601). The discharge pipe (6) is equipped with a spiral feeder (602) for rotating inside, which is used to discharge the coarse material after screening.

3. The raw material pretreatment device for composite material processing according to claim 2, characterized in that: The sieve ball ring frame (301) is integrally provided with a return ring frame (303) on the side near the discharge pipe (6), and the return ring frame (303) is integrally provided with an inner support ring frame (304) on the side near the discharge pipe (6). The inner wall of the ball mill cylinder (3) is separated from the edge of the ball screen ring frame (301) to form a ball drop chamber (302). A ball guide bend (311) is fixedly arranged in an annular array between the inner support ring frame (304) and the inner wall of the ball mill cylinder (3). One end of the ball guide bend (311) passes through the return ring frame (303) and communicates with the inside of the ball drop chamber (302). A ball guide baffle (312) is fixedly arranged in an annular array inside the ball drop chamber (302). The ball guide baffle (312) is used to guide the steel balls falling into the ball drop chamber (302) into the ball guide bend (311) when the ball mill cylinder (3) rotates. The ball mill cylinder (3) has ball outlet holes (318) arranged in an array on the side wall in the middle section. The end of each ball guide bend (311) is connected to the corresponding ball outlet hole (318).

4. The raw material pretreatment device for composite material processing according to claim 3, characterized in that: The outer wall of the ball mill cylinder (3) and both sides of the ball outlet hole (318) are fixedly provided with longitudinal rails (704), and the surface of the longitudinal rails (704) is slidably assembled with sliders (705). The outer wall of the ball mill cylinder (3) and the position of the ball outlet hole (318) are fixedly provided with wall-adhering rails (707). The two ends of the wall-mounted rail (707) are slidably assembled with hole covers (708), and the inside of the hole cover (708) and the outer wall of the ball mill cylinder (3) are connected with springs (715). The two adjacent sliders (705) are connected with connecting rods (706) at opposite ends. The end of the connecting rod (706) is connected to the corresponding hole cover (708). The surface of the slider (705) is fixedly provided with support rods (709).

5. The raw material pretreatment device for composite material processing according to claim 4, characterized in that: An operating shell (703) is integrally provided on one side of the steel ball discharge cover (7). An operating shaft (710) is rotatably assembled on the inner edge of the operating shell (703). Double threaded screws (711) are rotatably assembled on both sides inside the operating shell (703). The double threaded screws (711) and the operating shaft (710) are connected by a sleeved chain (712). Both ends of the double threaded screws (711) are screwed with screw tubes (713). The two screw tubes (713) located at the same end are connected together by a guide rod stop (714). The guide rod stops (714) at both ends are arranged to bulge towards each other. When the support rod (709) and the guide rod stop (714) come into contact with each other, the corresponding two hole covers (708) move in opposite directions and open the corresponding ball outlet hole (318).

6. The raw material pretreatment device for composite material processing according to claim 3, characterized in that: The guide plate (305) is fixedly installed inside the inner support ring (304), and a primary screen (306) is embedded in the edge array of the guide plate (305). The primary screen (306) is used to screen and separate the powder.

7. The raw material pretreatment device for composite material processing according to claim 2, characterized in that: The ball mill cylinder (3) has a series of through holes in the secondary sieve cavity (310) for the secondary material to pass through. The inner wall of the ball mill cylinder (3) at the position of the secondary sieve cavity (310) is fixedly welded with a flow guide baffle (317) in an array. The flow guide baffle (317) is used to guide the coarse material into the interior of the discharge pipe (6).

8. The raw material pretreatment device for composite material processing according to claim 1, characterized in that: One end of the ball mill cylinder (3) is movably fitted with a grading discharge hood (8). A powder outlet (801) is provided at the bottom of the grading discharge hood (8) and at the position corresponding to the primary sieve cavity (308). A secondary material outlet (802) is provided at the bottom of the grading discharge hood (8) and at the position corresponding to the secondary sieve cavity (310).

9. The raw material pretreatment device for composite material processing according to claim 1, characterized in that: The gap screw assembly includes a bolt (901), a sleeve (902), a tapered tube (904), and a nut (907). The bolt (901) passes through the liner (9) and the ball mill cylinder (3). The sleeve (902) is fitted on the outer surface of the bolt (901), and a locking flap (903) is integrally connected in a ring array on one side of the sleeve (902). The locking flap (903) passes through the liner (9) and the ball mill cylinder (3).

10. The raw material pretreatment device for composite material processing according to claim 9, characterized in that: The tapered tube (904) is sleeved on the end of the bolt (901), and the tapered end of the tapered tube (904) is inserted into the gap between the locking disc (903) and the bolt (901). The locking disc (903) is deformed due to compression and its end is stuck on the outer wall of the ball mill cylinder (3). The nut (907) is screwed to the end of the bolt (901), and a sealing gasket (905) and a washer (906) are provided between the nut (907) and the tapered tube (904).

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