A system for disassembling a coal breaker hammer head

Abstract

This utility model discloses a system for disassembling the hammerhead of a coal crusher, comprising: a pin-removing device for removing the crusher's pin shaft and a hammer-removing device for removing the crusher's hammerhead. This utility model significantly reduces the disassembly time of the hammerhead and hammerhead pin shaft from thirty minutes required for manual disassembly to two minutes. Furthermore, it reduces labor costs and avoids damage to other components caused by manual hammering, thus lowering maintenance and component replacement costs. Additionally, it is simple and stable to operate, reducing the risk of injury to operators.

Description

Technical Field

[0001] This utility model belongs to the field of crusher peripherals, and in particular relates to a system for disassembling the hammer head of a coal preparation crusher. Background Technology

[0002] Crushers are indispensable key equipment in many industries such as mining, construction, and metallurgy, playing a core role in material crushing and processing. They are widely used in primary crushing after ore mining, resource utilization of construction waste, and pretreatment of metallurgical raw materials, serving as the cornerstone for ensuring the continuity and efficiency of production in these industries.

[0003] During crusher maintenance, when disassembling worn hammers, if the hammer and hammer handle are connected by a pin (i.e., a split hammer structure), a laborious and dangerous task often arises—manually swinging a sledgehammer to remove the pin. During this process, the maintenance worker must adjust the heavy hammer suspended on the rotor to a suitable angle, barely exposing the pin hole. Then, another person, or even several people, take turns swinging a sledgehammer weighing over ten pounds, repeatedly and violently striking the stubborn end of the pin with a specially made heavy steel hammer. However, pins often become extremely stuck due to long-term impact, thermal expansion and deformation, or internal corrosion and adhesion. They often require dozens or even hundreds of full-force blows to loosen. This not only consumes enormous physical strength, forcing workers to become exhausted and their movements to become distorted, but also harbors multiple serious risks: First, the violent vibration can easily cause sprains and contusions to the worker's hand, wrist, or even arm when holding the steel punch; second, fragments of the steel punch or hammer head may fly out and injure people during high-speed collisions, just like shrapnel; third, it is difficult to accurately control the landing point when striking violently, and the sledgehammer is very likely to deviate and slip, directly hitting the worker's hands, feet, or body and causing serious injury; finally, the brutal hammering may also cause deformation of the pin surface, damage to the hammer handle structure, or accidental damage to the rotor disc, affecting subsequent installation and equipment balance accuracy.

[0004] As a core and vulnerable component of the crusher, the hammerhead comes into direct contact with the material and is subjected to strong impacts, friction, and compression. Due to its harsh working environment, it wears out extremely quickly when crushing ores with high hardness (such as iron ore and quartz) or during prolonged high-intensity operation.

[0005] According to relevant statistics, when processing ores with a hardness of 6-8, the service life of ordinary high-manganese steel hammerheads is only 1-2 months. Frequent replacements have become a bottleneck restricting production efficiency. Statistics show that manually disassembling a single hammerhead takes up to 30 minutes. Furthermore, uneven force on the hammerhead during striking can easily cause collateral damage to other components of the crusher hammerhead, increasing maintenance costs. While gas cutting can quickly separate the hammerhead from the connecting pin, the high temperature alters the microstructure of the metal at the connection point, reducing its strength and toughness and affecting the service life of subsequent components. At the same time, gas cutting operations require specialized skills and protective measures, posing certain safety risks such as fire hazards and burns to operators. Utility Model Content

[0006] The purpose of this utility model is to provide a method for disassembling the hammer head system of a coal crusher, so as to solve the problems of low efficiency and safety hazards in disassembling the hammer head pin and hammer head.

[0007] The present invention adopts the following technical solution: a system for disassembling the hammer head of a coal crusher, comprising: a pin-removing device for removing the pin of the crusher, and a hammer-removing device for removing the hammer head of the crusher.

[0008] The pin removal device includes:

[0009] Two support plates are arranged opposite each other and vertically; a horizontally arranged top plate is fixedly connected to the upper part of the two support plates;

[0010] The base is horizontally positioned below the top plate and has a drop hole running from top to bottom. The drop hole of the base is used to place the split hammer of the crusher that has not been disassembled. The hammer head pin of the split hammer is placed vertically and is coaxial with the drop hole. The lower end of the support plate is fixedly connected to the base.

[0011] A horizontal force-bearing plate is horizontally set between the base and the top plate. A pull-out rod is fixedly connected to its lower side. The pull-out rod is coaxially set with the drop hole. The edge of the horizontal force-bearing plate is sleeved on a vertically set guide rod. The horizontal force-bearing plate can move up and down along the guide rod.

[0012] The jack is placed on the upper side of the horizontal load-bearing plate, with the lifting end of the jack in contact with the top plate. The jack is used to press the horizontal load-bearing plate downward and force the rod to move downward and abut against the upper side of the pin, thereby applying force to the pin to force it to move downward, disengage from the hammer, and fall into the drop hole.

[0013] The beneficial effects of this utility model are:

[0014] This invention significantly reduces the disassembly time of the hammerhead and hammerhead pin from 30 minutes to 2 minutes; it also reduces labor costs and avoids damage to other parts caused by manual hammering, thus reducing maintenance and parts replacement costs; furthermore, it is simple and stable to operate, reducing the risk of injury to operators.

[0015] This invention first removes the pin of the crusher using a pin removal device, and then removes the hammer of the crusher using a hammer removal device. The entire disassembly process takes only two minutes.

[0016] This invention provides a hammer head disassembly device that allows for hammer head disassembly during both piston rod retraction and extension. When the piston rod extends to the right, the hammer head is placed near the right fixed plate. A positioning rod is inserted through the through hole in the left fixed plate into the fixing hole of the hammer handle of the split hammer (after the pin has been removed). At this point, the piston rod extends to the right, pushing the hammer head to the right and disengaging it from the hammer handle. Conversely, when the piston rod retracts to the left, the hammer head is placed near the left fixed plate. A positioning rod is inserted through the through hole in the right fixed plate into the fixing hole of the hammer handle of the split hammer (after the pin has been removed). The piston rod retracts to the left, forcing the hammer head to the left and disengaging it from the hammer handle. Therefore, this device significantly improves disassembly efficiency, allowing for hammer head disassembly during both piston rod retraction and extension. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the pin-removing device of this utility model;

[0018] Figure 2 This is a cross-sectional view of the pin-removal device of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the hammer head disassembly device of this utility model;

[0020] Figure 4 This is an isometric view of the hammer-disassembly device of this utility model;

[0021] Figure 5 This is a right view of the hammer-removing device of this utility model;

[0022] Figure 6 This is a top view of the hammer-removing device of this utility model.

[0023] Among them: 10. Support plate; 11. Base; 12. Drop hole; 13. Horizontal load plate; 14. Extension rod; 15. Jack; 16. Guide rod; 17. Elastic element; 20. Front support plate; 21. Rear support plate; 22. Extension slot; 23. Support base plate; 24. Sliding slot; 25. Actuating crossbar; 26. Actuating upright; 27. Split hammer; 28. Left fixing plate; 29. ​​Hammer head; 30. Right fixing plate. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0026] This utility model discloses a system for disassembling the hammer head of a coal crusher, including: a pin-removing device for removing the pin of the crusher, and a hammer-removing device for removing the hammer head 29 of the crusher.

[0027] like Figure 1-2 As shown, the pin removal device includes: two supporting upright plates 10, a placement base 11, a horizontal force-bearing plate 13, and a jack 15.

[0028] Two supporting upright plates 10 are arranged opposite each other and vertically; a horizontally arranged top plate is fixedly connected to the upper part of the two supporting upright plates 10.

[0029] The placement base 11 is horizontally positioned and located below the top plate. A drop hole 12 is provided through the placement base 11 from top to bottom. The drop hole 12 of the placement base 11 is used to place the split hammer 27 of the crusher that has not been disassembled. The hammer head 29 of the split hammer 27 is placed vertically and is coaxial with the drop hole 12. The lower end of the supporting plate 10 is fixedly connected to the placement base 11.

[0030] The horizontal force plate 13 is horizontally set and located between the base 11 and the top plate. A pull rod 14 is fixedly connected to the lower side of the horizontal force plate 13. The pull rod 14 is coaxially set with the drop hole 12. The edge of the horizontal force plate 13 is sleeved on the vertically set guide rod 16. The horizontal force plate 13 can move up and down along the guide rod 16.

[0031] The upper end of the guide rod passes through the end of the horizontal force plate 13 and the horizontal force plate 13 is fixed to the guide rod by bolts, and the lower end of the guide rod is fixedly connected to the placement base 11.

[0032] The jack 15 is placed on the upper side of the horizontal force plate 13, and the lifting end of the jack 15 is in contact with the top plate. The jack 15 is used to press the horizontal force plate 13 downward and force the pull rod 14 to move downward and abut against the upper side of the pin, thereby applying force to the pin to force the pin to move downward and disengage from the hammer head 29 and fall into the drop hole 12.

[0033] Four guide rods 16 are provided, and each of them is fitted with an elastic element 17. The elastic element 17 is used to return the horizontal force plate 13 to its upward position. The upper end of the elastic element 17 abuts against the lower side of the horizontal force plate 13, and the lower end of the elastic element 17 abuts against the upper side of the placement base 11.

[0034] like Figure 3-6 As shown, the hammer removal device includes: a front support plate 20 and a rear support plate 21, a support base plate 23, a lever 25, and two lever uprights 26.

[0035] The front support plate 20 and the rear support plate 21 are arranged vertically and opposite to each other; both the front support plate 20 and the rear support plate 21 have through slots 22 extending from front to back, and the two through slots 22 are arranged opposite to each other.

[0036] The support base plate 23 is horizontally set between the front support plate 20 and the rear support plate 21, and is fixedly connected to the front support plate 20 and the rear support plate 21. The setting height of the support base plate 23 is higher than the opening height of the extension groove 22. Two sliding grooves 24 are opened from top to bottom on the support base plate 23, which are parallel to each other and correspond to each other.

[0037] The horizontal lever 25 is set horizontally and is located on the lower side of the support base plate 23. The front and rear ends of the horizontal lever 25 extend to both sides through the extension slot 22 respectively. The left or right side of the horizontal lever 25 is fixedly connected to the piston rod of the hydraulic cylinder.

[0038] Two vertically arranged levers 26 are fixedly connected to the upper side of the lever crossbar 25 at their lower ends, and the upper ends of the two levers 26 pass through the corresponding sliding grooves 24 and extend upward.

[0039] The split hammer 27, whose pin has been removed, is placed on the support base plate 23 between the two sliding grooves 24; then, when the split hammer 27 is fixed, the two actuating rods 26 lock the hammer head 29, and under the drive of the piston rod, the hammer head 29 is moved away from the split hammer 27, so that the hammer head 29 is disengaged from the split hammer 27 and the disassembly is completed.

[0040] A left fixing plate 28 is fixedly connected to the upper side of the front support plate 20 and the rear support plate 21. The left fixing plate 28 is horizontally set and its lower side is fixedly connected to the front support plate 20 and the rear support plate 21. The left fixing plate 28 is located on the left side of the sliding groove 24. A left through hole is opened on the left fixing plate 28. The left through hole is used for the positioning rod to pass through. The upper end of the positioning rod is sleeved in the left through hole, and its lower end extends into the fixing hole of the hammer handle of the split hammer 27, which has been removed from the pin, thereby fixing the split hammer 27 and making it easier for the piston rod to disassemble the hammer head 29 to the right.

[0041] A right fixing plate 30 is fixedly connected to the upper side of the front support plate 20 and the rear support plate 21. The right fixing plate 30 is horizontally set and its lower side is fixedly connected to the front support plate 20 and the rear support plate 21. The right fixing plate 30 is located on the right side of the sliding groove 24. A right through hole is opened on the right fixing plate 30. The right through hole is used for the positioning rod to pass through. The upper end of the positioning rod is sleeved in the right through hole, and its lower end extends into the fixing hole of the hammer handle of the split hammer 27, which has been removed from the pin, thereby fixing the split hammer 27 to facilitate the piston rod to disassemble the hammer head 29 to the left.

[0042] When disassembling the crusher hammer 29, the pin of the hammer 29 needs to be removed first. This requires disassembling the pin assembly. Place the undismantled split hammer 27 in the drop hole 12 of the base 11, ensuring the pin is vertical and coaxial with the drop hole 12. This arrangement ensures the pin falls downwards from the drop hole 12 during disassembly. After placing the split hammer 27, activate the jack 15. The lifting end of the jack 15 will then rest against the lower side of the top plate. After the thrust of 5, the horizontal force plate 13 moves downward along the guide rod 16. At this time, the elastic element 17 is under pressure and is in a compressed state. During the downward movement of the horizontal force plate 13, it drives the pull rod 14 to move downward, so that the lower end of the pull rod 14 abuts against the upper side of the pin and continuously applies force. Since the hammer head 29 is located on the placement base 11 and the area below the pin is empty, the pin moves downward continuously under the action of the pull rod 14 until it is separated from the hammer head 29, thus completing the disassembly.

[0043] After disassembling the pin, the hammer head 29 of the split hammer 27 needs to be removed. In existing technology, three workers are required to disassemble the hammer head 29. However, this invention only requires placing the split hammer 27 on the support base plate 23 between the two sliding grooves 24. Then, the positioning rod passes through the through hole in the left fixing plate 28 and extends into the fixing hole of the hammer handle of the split hammer 27. Using the positioning rod, one end of the split hammer 27 is secured below the left fixing plate 28. At this point, the hammer head 29 of the split hammer 27 is on the right side. The piston rod extends to the right, forcing the actuating crossbar 25 to move to the right along with the actuating vertical rod 26, thereby moving the hammer... The head 29 is pushed to the right and disengaged from the hammer handle; then another split hammer 27 that needs to be disassembled is placed on the support base plate 23 and between the two sliding grooves 24. Then, the positioning rod passes through the through hole of the right fixing plate 30 and then extends into the fixing hole of the hammer handle of the split hammer 27. The positioning rod is used to lock one end of the split hammer 27 under the right fixing plate 30, which is exactly the opposite of the previous placement direction of the split hammer 27. At this time, the hammer head 29 of this split hammer 27 is on the left side. The piston rod is activated to retract to the left, which forces the lever 25 to move to the left with the lever 26, thereby pushing the hammer head 29 to the left and disengaging it from the hammer handle.

[0044] Regarding the setting of the hydraulic cylinder, in the above configuration, the hydraulic cylinder is located on the left side and fixed to the lower left side of the front support plate 20 and the rear support plate 21. Of course, it is also possible to choose to set the hydraulic cylinder on the right side.

Claims

1. A system for disassembling the hammerhead of a coal preparation crusher, characterized in that, include: A pin removal device for removing the pin of a crusher, and a hammer removal device for removing the hammer (29) of a crusher. The pin-removal device includes: Two support plates (10) are arranged opposite each other and vertically; a horizontally arranged top plate is fixedly connected to the upper part of the two support plates (10); A placement base (11) is horizontally positioned and located below the top plate, with a drop hole (12) extending from top to bottom on it. The drop hole (12) of the placement base (11) is used to place the split hammer (27) of the crusher that has not been disassembled. The hammer head (29) of the split hammer (27) is vertically positioned and coaxial with the drop hole (12). The lower end of the supporting upright plate (10) is fixedly connected to the placement base (11). A horizontal force-bearing plate (13) is horizontally set and located between the placement base (11) and the top plate. A pull-out rod (14) is fixedly connected to its lower side. The pull-out rod (14) is coaxially set with the drop hole (12). The edge of the horizontal force-bearing plate (13) is sleeved on the vertically set guide rod (16). The horizontal force-bearing plate (13) can move up and down along the guide rod (16). A jack (15) is placed on the upper side of the horizontal force plate (13), and the lifting end of the jack (15) is in contact with the top plate. The jack (15) is used to press the horizontal force plate (13) downward and force the pull rod (14) to move downward and abut against the upper side of the pin, thereby applying force to the pin to force the pin to move downward and disengage from the hammer (29) and fall into the drop hole (12).

2. The system for disassembling the hammerhead of a coal crusher according to claim 1, characterized in that, Four guide rods (16) are provided, and each of them is fitted with an elastic element (17). The elastic element (17) is used to return the horizontal force plate (13) to its upward position.

3. A system for disassembling the hammerhead of a coal crusher according to claim 1, characterized in that, The hammer-dismantling device includes: The front support plate (20) and the rear support plate (21) are arranged vertically and opposite to each other; both the front support plate (20) and the rear support plate (21) are provided with protruding slots (22) running from front to back, and the two protruding slots (22) are arranged opposite to each other; A support base plate (23) is horizontally positioned between the front support plate (20) and the rear support plate (21) and is fixedly connected to the front support plate (20) and the rear support plate (21); the height of the support base plate (23) is higher than the opening height of the extension groove (22); two sliding grooves (24) are opened from top to bottom on the support base plate (23) and are parallel and corresponding to each other. Move the crossbar (25) horizontally, located on the lower side of the support base plate (23), with its front and rear ends extending to both sides through the extension groove (22), and its left or right side fixedly connected to the piston rod of the hydraulic cylinder; Two vertically mounted levers (26) are fixedly connected at their lower ends to the upper side of the horizontal lever (25), and their upper ends pass through the corresponding sliding grooves (24) and extend upwards. The split hammer (27) with the pin removed is placed on the support base plate (23) between the two sliding grooves (24); then when the split hammer (27) is fixed, the two actuating rods (26) hold the hammer head (29) and move the hammer head (29) away from the split hammer (27) under the drive of the piston rod, so that the hammer head (29) is disengaged from the split hammer (27) and the disassembly is completed.

4. A system for disassembling the hammerhead of a coal crusher according to claim 3, characterized in that, A left fixing plate (28) is fixedly connected to the upper side of the front support plate (20) and the rear support plate (21). The left fixing plate (28) is horizontally set and its lower side is fixedly connected to the front support plate (20) and the rear support plate (21). The left fixing plate (28) is located on the left side of the sliding groove (24). A left through hole is provided on the left fixing plate (28). The left through hole is used for the positioning rod to pass through. The upper end of the positioning rod is sleeved in the left through hole, and its lower end extends into the fixing hole of the hammer handle of the split hammer (27) whose pin has been removed, thereby fixing the split hammer (27) and making it easier for the piston rod to disassemble the hammer head (29) to the right.

5. A system for disassembling the hammerhead of a coal crusher according to claim 3, characterized in that, A right fixing plate (30) is fixedly connected to the upper side of the front support plate (20) and the rear support plate (21). The right fixing plate (30) is horizontally set and its lower side is fixedly connected to the front support plate (20) and the rear support plate (21). The right fixing plate (30) is located on the right side of the sliding groove (24). A right through hole is provided on the right fixing plate (30). The right through hole is used for the positioning rod to pass through. The upper end of the positioning rod is sleeved in the right through hole, and its lower end extends into the fixing hole of the hammer handle of the split hammer (27) whose pin has been removed, thereby fixing the split hammer (27) so that the piston rod can be disassembled to the left to remove the hammer head (29).

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