A device for cement mill ball mill steel ball filling

Abstract

This utility model discloses a device for adding steel balls to a cement mill ball mill, comprising: a receiving hopper with an openable and closable discharge port at its bottom, the discharge port being mechanically connected to a lifting lug via a pull rod; an electric traveling mechanism including a track installed on the concrete frame at the top of the ball mill, a traveling trolley moving along the track, and a winch driving the traveling trolley, the winch's traction wire rope being connected to the lifting lug; and a pit located on the ground next to the ball mill for accommodating the receiving hopper; wherein the opening and closing state of the discharge port is controlled by the lifting action of the winch and the gravity of the steel balls. When the winch lifts the receiving hopper, the tension of the traction wire rope causes the discharge port to close; when the receiving hopper descends to the ball mill's filling port, the gravity of the steel balls forces the discharge port to open automatically. This utility model is simple in method, and through the electric lifting traveling device, it solves the difficulty of transporting barrel-type steel balls, increases the speed of steel ball adding, and reduces the risk of adding steel balls at height.

Description

Technical Field

[0001] This utility model belongs to the technical field of cement production equipment, specifically relating to a device for adding steel balls to a cement ball mill. Background Technology

[0002] In cement plant production, ball mills require regular addition of steel balls to grind clinker and other mixed materials. The traditional method involves transporting steel balls in iron drums, which are then manually or using hoisting equipment to the top of the ball mill's filling port, where the balls are poured out from a height. This method has several drawbacks: significant safety hazards, such as the risk of balls scattering and personnel falling; low efficiency, requiring repeated erection of temporary platforms and manual handling, resulting in significant time consumption; and complex operation, requiring multiple people to coordinate, and difficulty in aligning the receiving hopper with the filling port.

[0003] For example, Chinese Utility Model Patent Application No. CN201922295045.7 discloses an automatic ball-adding device for a ball mill, including a conveying pipe. At least one feeder is fixedly installed at the upper end of the conveying pipe. The feeder includes a feeding tube, a storage hopper, a photoelectric counter, and a ball-adding control mechanism. The upper end of the feeding tube is connected to the bottom of the storage hopper, and the lower end of the feeding tube is connected to the conveying pipe. This automatic ball-adding device for a ball mill can simultaneously add multiple types of steel balls. The quantity of each type of steel ball can be independently controlled without affecting each other, effectively improving the speed and efficiency of steel ball addition, shortening the steel ball addition time, and demonstrating good practicality.

[0004] For example, Chinese Utility Model Patent Application No. CN201420367622.3 discloses a ball mill steel segment filling device with high filling efficiency, including a chute, a filling port section, a filling platform, and platform railings. One end of the chute is fixedly connected to the filling port, and the other end is connected to the feed end of the ball mill. A filling platform is set at the lower part of the filling port section. The filling platform is set on the side of the steel ball pool and is equipped with platform railings. This solution uses a steel pipe as the filling pipe and sets the filling port next to the steel ball pool, and sets up a corresponding filling platform and platform railings. Steel segments can be manually added directly from the steel ball pool. The steel segment addition is convenient and flexible, reducing labor intensity, improving work efficiency, reducing production costs, and improving operational safety while eliminating safety hazards. This utility model has a simple structure, is easy to operate, safe to use, and has high filling efficiency.

[0005] For example, Chinese invention patent application number CN202111126347.7 discloses a bidirectional ball feeding method for a ball mill ball feeder, comprising the following steps: S1: A ball inlet groove is arranged at the bottom of the ball chamber outlet, with a left ball outlet and a right ball outlet at each end of the ball inlet groove, and a left infrared counter and a right infrared counter respectively installed at the left and right ball outlets; S2: A ball-distributing rotary device is arranged on one side of the ball inlet groove, driven by a horizontal rotating disk, the horizontal rotating disk being driven to rotate by a drive assembly, and the ball-distributing rotary device having multiple ball-pushing baffles spaced circumferentially; S3: The drive assembly is controlled by an electrical control box to drive the horizontal rotating disk and the ball-distributing rotary device to rotate synchronously, and the ball-pushing baffles on the ball-distributing rotary device are used to push the steel balls in the ball inlet groove to flow out from the left or right ball outlet, thereby realizing bidirectional ball feeding. In practical applications, bidirectional ball feeding is achieved, allowing simultaneous ball supply to two ball mills, effectively improving the efficiency and automation of steel ball feeding.

[0006] The above-mentioned existing technologies all have problems such as significant safety hazards, low efficiency, and complex operation. Therefore, this application provides a device for adding steel balls to a cement mill ball mill. Utility Model Content

[0007] This invention addresses the shortcomings of existing technologies by providing a device for adding steel balls to a cement mill ball mill.

[0008] The device for adding steel balls to a cement mill ball mill includes: a receiving hopper with an openable and closable discharge port at its bottom, the discharge port being mechanically connected to a lifting lug via a pull rod;

[0009] The electric traveling mechanism includes a track installed on the concrete frame on top of the ball mill, a traveling trolley that moves along the track, and a winch that drives the traveling trolley. The winch's traction wire rope is connected to a lifting lug.

[0010] A pit, located on the ground next to the ball mill, is used to accommodate the receiving hopper;

[0011] The opening and closing state of the discharge port is controlled by the lifting action of the winch and the gravity of the steel balls. When the winch lifts the receiving hopper, the pulling force of the traction steel wire rope closes the discharge port; when the receiving hopper descends to the ball mill filling port, the gravity of the steel balls presses the discharge port open automatically.

[0012] Furthermore, the discharge port has a hinged structure, with one end of the pull rod hinged to the edge of the discharge port and the other end connected to the lifting lug.

[0013] Furthermore, the electric walking mechanism is equipped with limit devices installed at both ends of the track to limit the travel of the trolley; the winch is a 3-ton electric hoist.

[0014] Furthermore, the end of the traction wire rope is equipped with a hook, which is detachably connected to the lifting lug.

[0015] Furthermore, the pit is a cylindrical structure with a diameter of 1.5 meters and a depth of 1 meter, and its central axis is aligned with the descent path of the receiving hopper.

[0016] Furthermore, the winch is connected to a programmable controller to control the horizontal movement of the traveling trolley and the lifting and lowering of the receiving hopper.

[0017] Furthermore, the track adopts a steel structure and is horizontally fixed to the bottom of the concrete frame beam at the top of the ball mill.

[0018] Furthermore, the receiving hopper is an inverted conical steel structure, the volume of which is matched to the amount of steel balls added in a single operation.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The device for adding steel balls to a cement mill ball mill described in this utility model has a receiving hopper placed in a pit next to the ball mill. Operators do not need to perform complex operations at height. They only need to control the movement and lifting of the receiving hopper through the electric walking mechanism and winch to complete the process of pouring and adding steel balls on the ground or in a relatively safe position, which greatly reduces the risk of operators falling and steel balls scattering and injuring people.

[0021] 2. The device for adding steel balls to a cement mill ball mill described in this utility model has a limit device on the electric walking mechanism, which is installed at both ends of the track to limit the travel of the walking trolley. At the same time, the winch is connected to a remote manual controller, which can accurately control the horizontal movement of the walking trolley and the lifting and lowering of the receiving hopper, so that the receiving hopper can be accurately positioned above the ball mill filling port, reducing the probability of safety problems such as steel ball tilting position deviation and equipment collision caused by inaccurate positioning.

[0022] 3. The device for adding steel balls to a cement mill ball mill described in this utility model has a pit located on the ground next to the ball mill. It is a cylindrical structure with a diameter of 1.5 meters and a depth of 1 meter. Its central axis is aligned with the descent path of the receiving hopper. The receiving hopper is placed directly in the pit, and the steel balls are poured directly from the ground into the receiving hopper in the pit. This simplifies the loading process and eliminates the need for repeatedly setting up temporary platforms and manually moving iron buckets, as required by traditional methods, thus saving a lot of time and manpower.

[0023] 4. The device for steel ball filling in a cement mill ball mill described in this utility model drives the receiving hopper to move horizontally along the track through an electric walking mechanism and controls the lifting and lowering of the receiving hopper through a winch, realizing the rapid movement and positioning of the receiving hopper. The operator can adjust the walking and lifting in real time through a remote manual controller, making the entire filling process smoother. Compared with the traditional method, each filling takes about 5 minutes, which effectively shortens the working time and increases the speed of steel ball filling.

[0024] 5. The device for adding steel balls to a cement mill ball mill described in this utility model controls the opening and closing of the discharge port by the lifting action of the winch and the gravity of the steel balls. When the winch lifts the receiving hopper, the tension of the traction wire rope closes the discharge port; when the receiving hopper descends to the ball mill filling port, the gravity of the steel balls forces the discharge port to open automatically. This automatic opening and closing method eliminates the need for manual operation of the discharge port, reducing operational steps and improving filling efficiency.

[0025] 6. The device for steel ball filling in a cement mill ball mill described in this utility model integrates the receiving hopper, electric walking mechanism and pit into a complete steel ball filling system. The parts work together, and the operator can control the entire steel ball filling process through the ground manual controller, making the operation simpler and more convenient.

[0026] 7. The device for adding steel balls to a cement mill ball mill described in this utility model has an inverted conical steel hopper with a volume matching the amount of steel balls added at one time. A closable discharge port is provided at the bottom, and the discharge port has a hinged structure. One end of the pull rod is hinged to the edge of the discharge port, and the other end is connected to a lifting lug. This structural design makes the opening and closing of the discharge port more flexible, while the inverted conical structure facilitates the accumulation of steel balls and smooth discharge. The track is made of steel profile and is horizontally fixed to the bottom of the concrete frame beam at the top of the ball mill, providing a stable running track for the traveling trolley and ensuring the smooth movement of the receiving hopper. Attached Figure Description

[0027] Figure 1 A schematic diagram of the overall structure of the device for adding steel balls to a cement mill ball mill;

[0028] Figure 2 A schematic diagram of the device for adding steel balls to a cement mill ball mill, showing the hopper in the closed state as steel balls are being added;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Feeding hopper; 2. Discharge port; 3. Tie rod; 4. Lifting lug; 5. Track; 6. Traveling trolley; 7. Winch; 8. Traction wire rope; 9. Steel ball; 10. Ball mill. Detailed Implementation

[0031] The following describes in detail, with reference to the accompanying drawings, specific embodiments of the device for adding steel balls to a cement mill ball mill according to this utility model. Example

[0032] like Figures 1 to 2 The device for adding steel balls to a cement mill ball mill includes: a receiving hopper 1, the bottom of which is provided with an openable and closable discharge port 2, the discharge port 2 being mechanically connected to a lifting lug 4 via a pull rod 3;

[0033] The electric walking mechanism includes a track 5 installed on the concrete frame on top of the ball mill 10, a walking trolley 6 that moves along the track 5, and a winch 7 that drives the walking trolley 6. The traction wire rope 8 of the winch 7 is connected to the lifting lug 4.

[0034] A pit is set on the ground next to the ball mill 10 to accommodate the receiving hopper 1;

[0035] The opening and closing state of the discharge port 2 is controlled by the lifting action of the winch 7 and the gravity linkage of the steel ball 9. When the winch 7 lifts the receiving hopper 1, the pulling force of the traction steel wire rope 8 causes the discharge port 2 to close. When the receiving hopper 1 descends to the filling port of the ball mill 10, the gravity of the steel ball 9 presses the discharge port 2 to open automatically.

[0036] Specifically, the receiving hopper 1 serves as a temporary storage container for the steel balls 9, which is used to hold a certain number of steel balls 9 for centralized filling operations; the bottom is provided with an openable and closable discharge port 2, which is mechanically connected with the pull rod 3 and the lifting lug 4, and is linked with the lifting action of the winch 7 and the gravity of the steel balls 9 to achieve precise control of the discharge port 2, ensuring that the steel balls 9 fall accurately into the ball mill 10 at the appropriate time;

[0037] Track 5 is installed on the top concrete frame of ball mill 10, providing a stable moving path for trolley 6, ensuring that trolley 6 can move accurately along the predetermined track, thereby transporting hopper 1 to directly above the filling port of ball mill 10;

[0038] The traveling trolley 6 moves along the track and carries the receiving hopper 1. It is a key component for adjusting the position of the receiving hopper 1 in the horizontal direction.

[0039] The winch 7 is the power source for driving the traveling trolley 6. It is connected to the lifting lug 4 through the traction wire rope 8. It can not only control the movement of the traveling trolley 6, but also lift and lower the receiving hopper 1 through the lifting action. Furthermore, it uses its lifting action and the gravity linkage of the steel ball 9 to control the opening and closing of the unloading port 2.

[0040] The pit is located on the ground next to the ball mill 10 to accommodate the receiving hopper 1. When the steel balls 9 are not being added, the receiving hopper 1 is placed on the ground inside the pit. This facilitates the filling of the steel balls 9, reduces the overall height of the device and the space occupied, and also provides some protection for the receiving hopper 1.

[0041] Furthermore, the discharge port 2 is a hinged structure, with one end of the pull rod 3 hinged to the edge of the discharge port 2 and the other end connected to the lifting lug 4.

[0042] Specifically, the discharge port 2 adopts a hinged structure design, that is, one side of the discharge port 2 is rotatably connected to the main body of the receiving hopper 1 through a hinge. This connection method allows the discharge port 2 to open and close freely within a certain angle range around the hinge point, providing a flexible control basis for the discharge of the steel ball 9.

[0043] The connection between the pull rod 3 and the lifting lug 4 is as follows: one end of the pull rod 3 is connected to the edge of the discharge port 2 by a hinge, usually in a position near the bottom of the receiving hopper 1 that facilitates the transmission of force. The other end is connected to the lifting lug 4, which is usually fixed on the upper outer side of the receiving hopper 1. At the same time, the lifting lug 4 is connected to the traction wire rope 8 of the winch 7 of the electric walking mechanism. In this way, the pull rod 3 becomes a force transmission component connecting the discharge port 2 and the lifting lug 4, realizing the linkage control between the opening and closing state of the discharge port 2 and the lifting action of the winch 7.

[0044] Its role in unloading control:

[0045] When the winch 7 lifts the receiving hopper 1, the traction wire rope 8 applies an upward pulling force to the lifting lug 4. Since one end of the pull rod 3 is connected to the lifting lug 4 and the other end is connected to the edge of the discharge port 2, this upward pulling force is transmitted to the discharge port 2 through the pull rod 3, causing the discharge port 2 to rotate downward around the hinge point, ultimately closing the discharge port 2. This closing method, achieved through mechanical linkage, ensures that the discharge port 2 closes reliably during the lifting process, preventing the steel balls 9 from spilling during the rising and moving of the receiving hopper, and ensuring the safety and stability of the transport of the steel balls 9.

[0046] When the receiving hopper 1 descends to the filling port of the ball mill 10, as the receiving hopper 1 descends, the steel balls 9 gradually accumulate near the discharge port 2 under their own gravity and exert downward pressure on the discharge port 2. At this time, the force of gravity of the steel balls 9 on the tie rod 3 and the lifting lug 4 will overcome the slight pulling force that the winch 7 may have, causing the discharge port 2 to rotate upward around the hinge point, thereby automatically opening and allowing the steel balls 9 to flow smoothly out of the discharge port 2 and into the grinding chamber of the ball mill 10.

[0047] Status of unloading port 2 during the loading stage:

[0048] Before the receiving hopper 1 descends into the pit for loading, the winch 7 is in its initial state, generally in the lifting state, so that the receiving hopper 1 is in a higher position. At this time, the traction wire rope 8 applies tension to the lifting lug 4, which is transmitted to the discharge port 2 through the pull rod 3, so that the discharge port 2 is closed. This prevents small amounts of impurities or dust that may exist inside the receiving hopper 1 from falling out during the descent and loading process. It also ensures the cleanliness of the inside of the receiving hopper 1 during subsequent loading and ensures that the steel balls 9 do not leak out from the discharge port 2 during the loading process, so as to facilitate the efficient completion of the loading operation.

[0049] Changes in the state of discharge port 2 during the lifting stage:

[0050] Once the receiving hopper 1 is filled with steel balls, the winch 7 starts to lift the receiving hopper 1. As the winch 7 operates, the traction wire rope 9 gradually tightens and pulls the lifting lug 4 upward. After the pull rod 3 is subjected to an upward pulling force, it drives the discharge port 2 to rotate downward around the hinge point until the discharge port 2 is completely closed. During this process, the pulling force gradually increases and stabilizes at a value that can ensure the reliable closure of the discharge port 2. At this time, the receiving hopper 1 is safely lifted to a certain height, ready for subsequent walking operations, without worrying that the steel balls 9 will spill from the discharge port 2 during the lifting process.

[0051] Status of unloading port 2 during the walking phase:

[0052] During the process of the electric walking mechanism driving the receiving hopper 1 to move along the track, the unloading port 2 always remains closed. This is because the winch 7 generally maintains a constant speed during the walking process, and the pulling force of the traction wire rope 8 on the lifting lug 4 continues to act on the pull rod, so that the unloading port 2 is closed, ensuring that the steel ball 9 will not fall during the movement of the receiving hopper 1, and ensuring the safety and stability of the entire device when moving in the horizontal direction.

[0053] Changes in the state of discharge port 2 during the unloading stage:

[0054] Once the receiving hopper 1 is precisely positioned directly above the filling port of the ball mill 10, the winch 7 begins to slowly lower the receiving hopper 1. As the receiving hopper 1 descends, the steel balls 9 gradually accumulate near the discharge port 2 under their own weight, exerting downward pressure on the discharge port 2. When this pressure overcomes the pulling force from the winch 7 on the tie rod 3 and the lifting lug 4, the discharge port 2 begins to rotate upward around the hinge point and gradually opens. Initially, it may slowly open a small gap. As the steel balls 9 continue to flow out, the discharge port 2 will further open to a suitable angle under the continuous action of the weight of the steel balls 9, ensuring that the steel balls 9 can flow smoothly into the grinding chamber of the ball mill 10 at a suitable speed. After all the steel balls 9 in the receiving hopper 1 have been discharged, the winch 7 raises the receiving hopper 1 again. At this time, since the discharge port 2 is no longer subject to the weight of the steel balls 9, under the action of the pulling force of the traction wire rope 8, the discharge port 2 will rotate downward around the hinge point and close again, preparing for the next filling cycle.

[0055] State of discharge port 2 during reset phase:

[0056] After the receiving hopper 1 completes unloading and closes, the winch 7 drives the traveling trolley 6 to bring the receiving hopper 1 back above the pit. Then the winch 7 descends, causing the receiving hopper 1 to fall into the pit. During this process, the unloading port 2 remains closed to prevent the steel ball 9 from falling during the return and descent, ensuring that the device can safely and stably return to the initial standby position and wait for the next steel ball 9 refilling command.

[0057] Furthermore, the electric walking mechanism is equipped with limit devices installed at both ends of the track to limit the travel of the trolley 6; the winch 7 is a 3-ton electric hoist.

[0058] Specifically, the limit device of the electric walking mechanism (not shown in the figure) usually consists of a limit switch, a stop block, and a mounting bracket. The limit switch is generally a limit switch or a proximity switch, which is used to detect the position of the walking trolley 6. The stop block is installed on the walking trolley 6 and moves along the track with the walking trolley 6. The mounting bracket fixes the limit switch at a predetermined position at both ends of the track to ensure that the stop block can accurately trigger the limit switch when the walking trolley 6 moves to the end of the track.

[0059] Limit devices are installed at both ends of the track. One end is the end-of-travel limit to prevent the traveling trolley 6 from running off the track, and the other end is set as the start-of-travel limit or reverse limit as needed. During installation, the position of the limit switch needs to be precisely adjusted so that the impact block triggers the limit switch when the traveling trolley 6 reaches the predetermined limit position. At the same time, the limit switch needs to be debugged to ensure its sensitivity and reliability, that is, when the impact block triggers the limit switch, it can accurately send a signal to stop the operation of the winch or the traveling trolley.

[0060] When the electric traveling mechanism starts running, the traveling trolley 6 is in the initial position at one end of the track, usually close to the loading position of the receiving hopper 1 or above the pit. At this time, the collision block installed on the traveling trolley 6 maintains a certain safe distance from the limit switch installed at the corresponding end of the track. The limit switch is in the normal state, and the winch drives the traveling trolley 6 to start moving along the track, causing the receiving hopper 1 to move horizontally together.

[0061] As the trolley 6 moves along the track toward the filling port of the ball mill 10, the limit switch installed at the other end of the track continuously monitors the position of the trolley 6. As the trolley 6 moves, the impact block gradually approaches the limit switch at the end of the track. The limit switch detects the position change of the trolley 6 by sensing the approach or collision of the impact block and feeds the position signal back to the control system in real time.

[0062] When the traveling trolley 6 moves to the preset limit position at the end of the track 5, the impact block installed on the traveling trolley 6 will trigger the limit switch installed at the end of the track 5. After receiving the trigger signal from the impact block, the limit switch immediately changes its own state and transmits this state change signal to the control system. After receiving the signal from the limit switch, the control system reacts quickly, cutting off the power supply to the winch 7 or the traveling trolley 6 or issuing a stop command to stop the traveling trolley 6. At this time, the traveling trolley 6 is accurately stopped at the predetermined position at the end of the track 5, preparing for the next operation, such as lifting the receiving hopper 1 and aligning it with the filling port.

[0063] If the traveling trolley 6 needs to run in reverse, the control system PLC will issue a reverse running command according to the preset program. At this time, the winch 7 or the drive device of the traveling trolley 6 will run in reverse, driving the traveling trolley 6 to move in reverse along the track. During the reverse movement, the limit switch installed at the other end of the track 5 will monitor and control the travel of the traveling trolley 6 again. When the traveling trolley 6 returns to the initial position or the next predetermined position, the limit switch will be triggered again, causing the traveling trolley 6 to stop running and completing one travel cycle.

[0064] When a loading operation is required, the control system PLC receives the loading command, the motor starts to reverse, the drum releases the traction steel wire rope 8, and drives the receiving hopper 1 to slowly descend vertically. During the descent, the electric hoist maintains a uniform descent speed through its speed control device for adding steel balls to the cement mill ball mill, ensuring that the receiving hopper 1 smoothly reaches the loading position in the pit. When the receiving hopper descends to the predetermined height, the electric hoist stops running. At this time, the receiving hopper 1 is in the open state, and the discharge port 2 is generally in the closed state when it is on the ground, waiting for loading. The operator or conveying equipment loads the steel balls 9 into the receiving hopper.

[0065] After receiving hopper 1 is filled with steel balls 9, the control system PLC receives a lifting command, the motor rotates forward, and the drum begins to wind the traction wire rope 8, driving receiving hopper 1 to rise vertically at a constant speed. As receiving hopper 1 rises, the tension of the traction wire rope 8 is transmitted to the discharge port 2 through the pull rod 3, causing the discharge port 2 to gradually close. The electric hoist continues to run until receiving hopper 1 rises to the predetermined height. At this point, the electric hoist stops running, and receiving hopper 1 is in a ready-to-move state, prepared for horizontal transport by the traveling trolley 6.

[0066] During the process of the traveling trolley 6 driving the receiving hopper 1 to move along the track 5, the electric hoist remains stationary to ensure that the length of the traction wire rope 8 remains unchanged, so that the receiving hopper 1 always maintains a stable height position during the horizontal movement; at this stage, the electric hoist mainly acts as a device for suspending and supporting the receiving hopper 1, ensuring that the receiving hopper 1 will not affect the closing state of the discharge port and the stability of the entire device due to shaking or swaying during the movement.

[0067] After the traveling trolley 6 accurately transports the receiving hopper 1 to directly above the filling port of the ball mill 10, the control system PLC receives the unloading command again. The motor reverses, the drum releases the traction steel wire rope 8, and drives the receiving hopper 1 to slowly descend vertically. During the descent, as the distance between the receiving hopper 1 and the filling port of the ball mill 10 gradually decreases, the pressure of the steel balls 9 on the discharge port 2 under their own gravity gradually increases. When the receiving hopper 1 descends to a suitable height, the electric hoist continues to descend slowly, allowing the steel balls 9 to flow from the discharge port 2 into the grinding chamber of the ball mill 10 under the action of gravity. During the unloading process, the winch (including the electric hoist) finely adjusts the descent speed as needed to control the unloading speed and flow rate of the steel balls 9, ensuring accurate filling.

[0068] After all the steel balls 9 in the receiving hopper 1 are unloaded into the ball mill 10, the electric hoist first lifts the receiving hopper, the motor rotates forward, and the drum winds the traction wire rope 8, causing the receiving hopper 1 to leave the filling port of the ball mill 10 and rise to a certain height; then, the traveling trolley 6 drives the receiving hopper 1 back to the top of the pit, and the electric hoist lowers the receiving hopper 1 again to send it into the pit, completing one steel ball 9 filling cycle; during this reset process, the lifting and lowering movements of the electric hoist also need to be stable and accurate to ensure that the receiving hopper 1 can return to the initial position smoothly and prepare for the next filling operation.

[0069] Furthermore, the end of the traction wire rope 8 is equipped with a hook, which is detachably connected to the lifting lug 4.

[0070] Specifically, the end of the traction wire rope 8 of the winch 7 is equipped with a standardized hook, such as an arc-shaped shackle hook, a swivel hook, or a safety locking hook, which are commonly used in industry. The hook is designed to be quick-opening and closing, making it easy to connect or disconnect from the lifting lug 4. The hook must have sufficient load-bearing capacity and meet the safety requirements of fatigue resistance and anti-disengagement.

[0071] The top outer side of the receiving hopper 1 is fixed with a lifting lug 4, which is usually a metal lug 4 that is welded or bolted together. The material is the same as the main body of the receiving hopper 1, such as Q235 steel. The position of the lifting lug 4 corresponds precisely to the suspension point of the hook. It has a connection hole or ring buckle that matches the hook. The lifting lug 4 is hinged to the edge of the discharge port 2 through the pull rod 3. It is a key intermediate component for transmitting the pulling force of the winch 7 to the discharge port 2.

[0072] The hook and the lifting lug 4 are quickly connected by inserting the hook into the connecting hole / ring of the lifting lug 4 and locking it manually; disassembly is done in reverse. This design allows the connection between the receiving hopper 1 and the traction wire rope 8 to be made without welding or permanent fixing, and can be flexibly assembled or separated according to actual needs.

[0073] Furthermore, the pit is a cylindrical structure with a diameter of 1.5 meters and a depth of 1 meter, and its central axis is aligned with the descent path of the receiving hopper 1.

[0074] Specifically, the pit is a key auxiliary facility in the steel ball 9 filling device of the cement mill ball mill 10. It is designed as a cylindrical structure with a diameter of 1.5 meters and a depth of 1 meter. The central axis is precisely aligned with the descent path of the receiving hopper 1. The cylindrical structure is usually made of concrete or steel structure lining. The bottom is flat and solid, and the inner wall is smooth to ensure the stability and safety of the receiving hopper 1 when it is placed.

[0075] The cylindrical structure has uniform stress characteristics, which can evenly distribute the pressure generated when the receiving hopper 1 is placed, and avoid local stress concentration that could lead to damage to the pit structure. At the same time, the circular cross-section has no sharp corners, which reduces the risk of friction and collision between the receiving hopper 1 and the inner wall of the pit, and protects the integrity of the receiving hopper 1 and the pit structure.

[0076] The pit diameter is 1.5 meters, slightly larger than the bottom diameter of the receiving hopper 1, to ensure that the receiving hopper 1 can be easily placed into the pit, and after placement, a certain safety gap is left around it, generally 10-20 centimeters, to avoid the receiving hopper 1 from contacting the inner wall of the pit and causing friction or collision, and also to facilitate the operator to perform auxiliary operations around the receiving hopper, such as cleaning and inspection.

[0077] The pit is 1 meter deep. The depth design takes into account the height of the receiving hopper 1 and the convenience of loading the steel balls 9. The 1-meter depth can accommodate most of the height of the receiving hopper 1, so that the receiving hopper 1 is in a relatively stable position after being placed, while ensuring that the steel balls 9 will not easily overflow from the receiving hopper 1 during the loading process. In addition, the appropriate depth also helps to reduce the drop of the steel balls 9 when they are poured from the ground to the receiving hopper 1, reduce the impact force of the steel balls 9 on the bottom of the receiving hopper 1, and protect the structure of the receiving hopper 1.

[0078] The central axis is aligned with the descent path of the receiving hopper 1. This design ensures that the receiving hopper 1 can accurately fall into the center of the pit when it is lowered by the winch 7 of the electric walking mechanism. The precise alignment avoids the offset or tilting of the receiving hopper 1 during placement, ensuring the stability of the receiving hopper 1 and providing a reliable foundation for subsequent operations such as filling, lifting and adding steel balls 9.

[0079] Furthermore, the winch 7 is connected to a programmable controller (not shown in the attached figure) for controlling the horizontal movement of the traveling trolley 6 and the lifting and lowering of the receiving hopper 1.

[0080] Specifically, a programmable logic controller (PLC) is a control device independent of the main unit and operated by an operator from a safe location on the ground. It is usually a portable operating handle or control panel, which is connected to the drive motors of the winch 7 and the traveling trolley 6 in the electric walking mechanism via cable or wireless communication module. The PLC integrates key functional modules such as direction control buttons, such as up, down, forward, backward, speed adjustment knob and emergency stop button, to achieve precise remote control of the lifting and lowering of the winch 7 and the horizontal movement of the traveling trolley 6.

[0081] The programmable controller is connected to the motor control circuit of the winch 7 and the drive motor control system of the traveling trolley 6 via electrical lines or wireless signal transmission. For wired connections, cables are usually laid fixedly along the track or equipment frame to ensure operational flexibility. Wireless connections transmit encrypted signals to avoid interference and improve operational freedom.

[0082] The programmable control includes an "Up / Down" button to control the forward and reverse rotation of the winch motor to achieve vertical lifting of the receiving hopper 1, a "Forward / Backward" button to control the horizontal movement of the traveling trolley 6 along the track 5, a "Speed ​​Adjustment" knob to adjust the lifting and traveling speed to adapt to different working conditions, and an "Emergency Stop" button to instantly cut off the power supply in an emergency to ensure safety.

[0083] Furthermore, track 5 adopts a steel structure and is horizontally fixed to the bottom of the concrete frame beam at the top of ball mill 10.

[0084] Specifically, track 5 adopts a steel structure, such as I-beams, H-beams or custom channel steel, whose cross-sectional shape has high strength bending resistance and good stability. The combination of the flanges and webs of the I-beams can effectively resist vertical and horizontal loads and can withstand the vertical pressure, horizontal traction force and dynamic impact force of the traveling trolley 6 during movement.

[0085] The track 5 is horizontally fixed to the bottom of the concrete frame beam at the top of the ball mill 10 by pre-embedded parts or welding, and extends horizontally along the filling area of ​​the ball mill 10, usually aligned with the projected area directly above the filling port of the ball mill 10. During installation, it is necessary to ensure the levelness and straightness of the track 5, and connect it to the concrete frame beam through a reinforcing bracket to ensure that the track 5 does not deform, sink or shift during long-term operation.

[0086] Furthermore, the receiving hopper 1 is an inverted conical steel structure, the volume of which is matched to the amount of steel balls added in a single operation.

[0087] Specifically, the receiving hopper 1 adopts an inverted conical steel structure, that is, a conical container that is larger at the top and smaller at the bottom. Its top opening is relatively large, which facilitates the rapid filling of steel balls 9. The bottom gradually narrows to the discharge port 2, forming a concentrated discharge channel. The inverted conical design utilizes the principle of gravity to allow the steel balls 9 to naturally accumulate in the hopper and slide towards the discharge port 2, which is conducive to the smooth flow and complete discharge of the steel balls 9.

[0088] The main body of the receiving hopper 1 is welded from Q235B or similar strength steel, which has sufficient structural strength and rigidity to withstand the impact force when the steel balls 9 are filled, the vibration during the lifting process, and the pressure during unloading. The steel surface is usually treated with anti-corrosion measures such as spraying anti-rust paint or galvanizing to extend the service life of the equipment and adapt to the humid and dusty production environment of cement plants.

[0089] The total volume of receiving hopper 1 is precisely calculated based on the amount of steel balls 9 added in a single batch. The amount of steel balls 9 added in a single batch is 1-2 tons, corresponding to a volume of approximately 0.5-1 cubic meters in receiving hopper 1. This ensures that the amount of steel balls 9 filled each time can meet the filling requirements of ball mill 10 without causing difficulties in lifting or unloading due to overfilling. At the same time, the size design of the inverted conical hopper matches the opening and closing structure of discharge port 2, ensuring that the steel balls 9 can flow out evenly and controllably when discharge port 2 is opened.

[0090] The working process of the device for adding steel balls to a cement mill ball mill is as follows:

[0091] 1. Loading stage:

[0092] In its initial state, the receiving hopper 1 is an inverted conical steel structure with a volume matching the single filling amount. It is stationary in the pit next to the ball mill 10. The pit is cylindrical with a diameter of 1.5 meters and a depth of 1 meter, and the central axis is aligned with the descent path of the receiving hopper.

[0093] The operator starts the electric walking mechanism via the ground manual controller, which is driven by the 3-ton electric hoist. The track 5 is installed at the bottom of the concrete frame beam on the top of the ball mill 10 and is fixed laterally. The operator controls the walking trolley 6 to move the receiving hopper 1 to the top of the pit.

[0094] The winch 7 electric hoist is equipped with a traction wire rope 8 (with a hook at the end, which can be detachably connected to the lifting lug of the receiving hopper) to lower the receiving hopper 1 into the pit, close to the ground, so that the steel ball 9 can be tilted. The traction wire rope 8 has a hook at the end, which can be detachably connected to the lifting lug 4 of the receiving hopper 1.

[0095] The operator pours the steel balls 9 from the iron bucket or other container directly into the receiving hopper 1 in the pit;

[0096] The discharge port 2 of the receiving hopper 1 is in a naturally open state and is not closed at first, so the steel ball 9 can fall freely into the hopper.

[0097] 2. Improvement Phase:

[0098] Triggering conditions: After the steel balls 9 are loaded in the pit, the operator confirms or uses a weight sensor (not shown in the figure) to assist in the judgment.

[0099] The operator controls the winch 7 to lift the traction wire rope 8 through the ground manual controller. The tension of the traction wire rope 8 is transmitted to the tie rod 3 through the lifting lug 4. The two ends of the tie rod 3 are connected to the lifting lug 4 and the edge of the discharge port 2 respectively. Under the action of the tension, the tie rod 3 pulls the discharge port 2 to rotate in the closing direction until the discharge port 2 is completely closed, forming a sealed space to prevent the steel balls 9 from scattering during the lifting process.

[0100] The winch 7 continues to lift, driving the traveling trolley 6 and the receiving hopper 1 to rise as a whole until they leave the pit and reach a safe height, avoiding collisions with the surrounding structures of the pit.

[0101] Limiting devices are installed at both ends of the track 5 to limit the rising height of the traveling trolley 6, prevent overtravel, and ensure that the receiving hopper 1 is stably suspended near the filling port of the ball mill 10.

[0102] 3. Walking stage:

[0103] Triggering condition: After the discharge port 3 of receiving hopper 1 is closed and raised to a safe height;

[0104] The operator controls the electric walking mechanism through the ground manual controller. The 3-ton electric hoist drives the walking trolley 6 to move horizontally along the pre-installed track 5. The track 5 is a steel structure and is horizontally fixed to the bottom of the concrete frame beam at the top of the ball mill 10. The receiving hopper 1 is moved from above the pit to directly above the filling port of the ball mill 10.

[0105] The limiting devices at both ends of the track 5 ensure that the traveling trolley 6 stops precisely at the corresponding position of the filling port. The winch 7 finely adjusts the vertical height of the receiving hopper 1 and, by pulling the wire rope 8, makes the unloading port 2 vertically aligned with the filling port, ensuring that the steel ball 9 falls smoothly.

[0106] The programmable controller adjusts the walking and lifting in real time to adapt to the differences in elevation and horizontal position of the filling port of different ball mills.

[0107] 4. Unloading stage:

[0108] Triggering condition: The receiving hopper 1 is precisely positioned above the filling port of the ball mill 10;

[0109] When the operation is performed, the operator controls the winch 7 to slowly lower the receiving hopper 1, the traction wire rope 8 is relaxed, the gravity of the receiving hopper 1 and the steel balls 9 acts on the discharge port 2, the downward pressure generated by the accumulation of steel balls 9 compresses the discharge port 2 to rotate in the opening direction, the pull rod 3 relaxes with gravity and loses the closing pull force on the discharge port 2 until the discharge port 2 is fully opened.

[0110] Under the action of gravity, the steel ball 9 automatically falls from the discharge port 2 into the filling port of the ball mill 10, completing a single filling without the need for operator intervention to open or close.

[0111] After the filling is completed, the operator controls the winch 7 to lift the receiving hopper 1, pulls the wire rope 8 to close the unloading port 2 again, and returns to the top of the pit to repeat the filling process. The operation is repeated until the filling of the entire steel ball 9 is completed.

[0112] The pit is filled with materials, steel balls 9 are poured into the receiving hopper 1, the winch 7 lifts them up, the traction wire rope 8 pulls and closes the unloading port 2, the traveling mechanism moves, the filling port is precisely positioned, the winch 7 descends, the steel balls 9 open the unloading port 2 by gravity and discharge the material, and the cycle continues until the filling is completed.

[0113] Traditional methods rely on manual high-altitude dumping of iron drums, which poses a risk of spillage and is inefficient. This invention simplifies the process by using pit loading, electric mobility, precise positioning, a self-unloading structure, and an automatic opening and closing closed-loop process. It achieves fully automated control, remote operation, full-process safety, no high-altitude spillage, and high-efficiency filling, solving the three major pain points of the prior art: significant safety hazards, low efficiency, and complex operation.

[0114] The preferred embodiments of this utility model are not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the concept and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A device for adding steel balls to a cement mill ball mill, characterized in that, Includes: a receiving hopper with an openable and closable discharge port at the bottom, the discharge port being mechanically connected to a lifting lug via a pull rod; The electric traveling mechanism includes a track installed on the concrete frame on top of the ball mill, a traveling trolley that moves along the track, and a winch that drives the traveling trolley. The winch's traction wire rope is connected to a lifting lug. A pit, located on the ground next to the ball mill, is used to accommodate the receiving hopper; The opening and closing state of the discharge port is controlled by the lifting action of the winch and the gravity of the steel balls. When the winch lifts the receiving hopper, the pulling force of the traction steel wire rope closes the discharge port; when the receiving hopper descends to the ball mill filling port, the gravity of the steel balls presses the discharge port open automatically.

2. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The discharge port has a hinged structure, with one end of the tie rod hinged to the edge of the discharge port and the other end connected to the lifting lug.

3. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The electric walking mechanism is equipped with limit devices installed at both ends of the track to limit the travel of the trolley; the winch is a 3-ton electric hoist.

4. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The end of the traction wire rope is equipped with a hook, which can be detachably connected to the lifting lug.

5. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The pit is a cylindrical structure with a diameter of 1.5 meters and a depth of 1 meter, and its central axis is aligned with the descent path of the receiving hopper.

6. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The winch is connected to a programmable controller, which is used to control the horizontal movement of the traveling trolley and the lifting and lowering of the receiving hopper.

7. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The track is made of steel and is horizontally fixed to the bottom of the concrete frame beam at the top of the ball mill.

8. The device for adding steel balls to a cement mill ball mill according to claim 1, characterized in that, The receiving hopper is an inverted conical steel structure, and its volume is matched to the amount of steel balls added in a single operation.

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