Dismounting device for hammer arm pin shaft of fine crusher

Abstract

The utility model discloses a dismounting device for a hammer arm pin shaft of a fine crusher, which belongs to the field of fine crushers and comprises a hydraulic pushing mechanism. According to the dismounting device, the base of the two-way hydraulic hollow jack abuts against the rotor of the equipment, the pushing screw rod is inserted into the hollow shaft rod of the two-way hydraulic hollow jack, and then the outer side wall, close to the rotor of the equipment, of the pushing screw rod is in threaded connection with the rotatable check block; the baffle ring on the baffle block is arranged towards the end of the hollow shaft rod of the bidirectional hydraulic hollow jack in a contact mode, then the bidirectional hydraulic hollow jack is started, the hollow shaft rod of the bidirectional hydraulic hollow jack pushes the pushing screw rod, the pushing screw rod abuts against the pin shaft of the hammer arm and ejects out the pin shaft, manual knocking and pin pulling are not needed, time and labor are saved, and efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of fine crushers, and specifically to a device for disassembling the pin shaft of the hammer arm of a fine crusher. Background Technique

[0002] A fine crusher is a device that crushes large particles of materials into smaller particles. It is mainly applicable to the crushing of coal, and can also be used for the materials in industries such as mines, metallurgy, chemicals, and industrial and trade, such as the crushing of limestone and coal. Its working principle is: the material enters the high-speed rotating hammers of the fine crusher along the entire inlet width, and the hammers impact the material onto the crushing tooth plate and then bounce back onto the hammers. This crushing process is repeated continuously, and through the impact between the crushed particles and the crushing plate, the required particle size of the material to be crushed is achieved.

[0003] The hammer head is installed at one end of the hammer arm, and the other end of the hammer arm is installed on the rotor of the device through a pin shaft. Multiple hammer heads and hammer arms on the crusher rotor shaft, and the hammer arms are installed on the rotor through pin shafts. Generally speaking, the hammer arms on the fine crusher are forgings, which have good toughness and can effectively reduce the influence of impact loads on the service life of the hammer heads and the rotor. However, the hammer arms will also wear, and sometimes uneven wear occurs, which will cause excessive vibration of the equipment. Therefore, it is necessary to remove them and rebalance or replace them with new ones.

[0004] The hammer arms are not disassembled for a long time. The pin shafts are relatively tightly fitted with the holes on the rotor disc. Moreover, due to the use environment being in a coal ash and humid environment, after long-term corrosion, the entire pin shaft sticks to the rotor disc. Therefore, a great deal of force is required for disassembly. Furthermore, the pin shafts are hidden inside the rotor disc, and there is no suitable force application point during disassembly, making it difficult to apply force. Therefore, in the case of not using tools, oxygen cutting is used to cut the pin shafts, and then they are knocked out from the inside little by little with a sledgehammer. Since the middle part of the pin shaft is relatively long, it is often necessary to cut off all the empty places, that is, the places not connected to the rotor disc, and then knock out the remaining parts inside the disc wall little by little. If the cutting is not good, it needs to be polished before it can be taken out. The whole process is quite time-consuming and laborious, and sometimes the hammer arm has to be cut off, resulting in a very low efficiency of the disassembly process.

[0005] Therefore, the present application provides a device for disassembling the pin shaft of the hammer arm of a fine crusher to solve the above problems. Content of the Utility Model

[0006] The present application provides a device for disassembling the pin shaft of the hammer arm of a fine crusher, aiming to solve the problems in the background technique that the existing disassembly process of the pin shaft of the hammer arm of a fine crusher is quite time-consuming and laborious, and sometimes the hammer arm has to be cut off, resulting in a very low efficiency of the disassembly process.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a device for disassembling the pin shaft of a hammer arm of a fine crusher, comprising a hydraulic pushing mechanism:

[0008] The hydraulic jacking mechanism includes a bidirectional hydraulic hollow jack, a jacking screw is inserted into the hollow shaft of the bidirectional hydraulic hollow jack, a block close to the base of the bidirectional hydraulic hollow jack is screwed on the jacking screw, a baffle ring matching the hollow shaft of the bidirectional hydraulic hollow jack is fixedly installed on the outer wall of the end of the block adjacent to the base of the bidirectional hydraulic hollow jack, and the end of the jacking screw close to the block extends toward the pin shaft of the hammer arm of the fine crusher and is abutted against the end of the pin shaft of the hammer arm of the fine crusher. In this way, when disassembling the hammer arm pin shaft, the base of the two-way hydraulic hollow jack is placed on the rotor of the equipment, the push screw is inserted into the hollow shaft of the two-way hydraulic hollow jack, and then a rotatable stopper is screwed on the outer wall of the rotor of the equipment close to the push screw, and the stop ring on the stopper is set to contact the end of the hollow shaft of the two-way hydraulic hollow jack. Then, the two-way hydraulic hollow jack is started, so that the hollow shaft of the two-way hydraulic hollow jack pushes the push screw, so that the push screw supports the pin shaft of the hammer arm and pushes it out. There is no need to manually knock and pull out the pin, which saves time and effort and is highly efficient.

[0009] Preferably, in order to drive the bidirectional hydraulic hollow jack, an input pipe is fixedly installed on the outer wall of the bidirectional hydraulic hollow jack at the hydraulic output end, and an electric hydraulic pump is fixedly installed on the end of the input pipe away from the bidirectional hydraulic hollow jack. The electric hydraulic pump drives the shaft tube of the bidirectional hydraulic hollow jack to perform bidirectional displacement, saving time and effort.

[0010] Preferably, in order to facilitate the adjustment of the position of the stopper, a bottom plate is fixedly installed on the base surface of the bidirectional hydraulic hollow jack, a pressure plate is arranged on one side of the bottom plate, and at least three support rods that are evenly arranged in the circumferential direction and are screwed to the bottom plate are fixedly installed on the outer wall of the pressure plate facing the bottom plate. Thereby, there is a certain operating space between the bidirectional hydraulic hollow jack and the rotor surface of the equipment, which is convenient for adjusting the stopper.

[0011] Preferably, in order to fix the bidirectional hydraulic hollow jack, three insertion cavities adapted to the support rod are evenly opened on the bottom plate in the circumferential direction, and the end of the support rod away from the pressure plate is inserted into the insertion cavity and the limiting nuts are screwed on the wall surfaces on both sides of the insertion cavity. In this way, the distance between the bottom plate and the pressure plate is fixed, and the stopper on the top push screw rod is conveniently adjusted in time.

[0012] Preferably, in order to adjust the position of the bidirectional hydraulic hollow jack, the disassembly device further includes an adjustment mechanism, which includes a trolley and a universal wheel fixedly installed at the bottom of the trolley, a lifting platform fixedly installed on the top of the trolley, and a connecting seat for fixing the bidirectional hydraulic hollow jack movably installed on the top of the lifting platform, so that the top push screw on the bidirectional hydraulic hollow jack is aligned with the pin shaft, so as to accurately remove the pin.

[0013] Preferably, in order to fix the two-way hydraulic hollow jack, a seat cavity for placing the two-way hydraulic hollow jack is provided on the connecting seat, and a hoop adapted to the outer wall of the two-way hydraulic hollow jack is hinged at the orifice of the seat cavity on the connecting seat. Fixing the two-way hydraulic hollow jack on the connecting seat is convenient and fast.

[0014] For this disassembly device, the base of the two-way hydraulic hollow jack is placed against the rotor of the equipment, the push rod is inserted into the hollow shaft rod of the two-way hydraulic hollow jack, and then a rotatable stopper is screwed on the outer wall of the push rod close to the rotor of the equipment. The retaining ring on the stopper is arranged to contact the end of the hollow shaft rod of the two-way hydraulic hollow jack. Then, the two-way hydraulic hollow jack is started, so that the hollow shaft rod of the two-way hydraulic hollow jack pushes the push rod, making the push rod hold against the pin shaft of the hammer arm and push it out. There is no need for manual knocking to remove the pin, which saves time and effort and has high efficiency.

[0015] For this disassembly device, the two-way hydraulic hollow jack is installed on the connecting seat, and then the trolley is pushed to transport the two-way hydraulic hollow jack to the pin shaft. Subsequently, the height of the two-way hydraulic hollow jack is adjusted by the lifting platform, so that the push rod on the two-way hydraulic hollow jack is aligned with the pin shaft, thereby accurately performing the pin removal work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front structural schematic diagram of a pin removal device for the hammer arm of a fine crusher;

[0017] Figure 2 It is a back structural schematic diagram of a pin removal device for the hammer arm of a fine crusher;

[0018] Figure 3 It is a sectional structural schematic diagram of a pin removal device for the hammer arm of a fine crusher.

[0019] In the figure:

[0020] 1. Hydraulic jacking mechanism; 11. Two-way hydraulic hollow jack; 12. Push rod; 13. Stopper; 14. Retaining ring; 15. Input pipe; 16. Electric hydraulic pump; 17. Bottom plate; 18. Pressing plate; 19. Support rod; 110. Insertion cavity; 111. Limit nut; 2. Adjusting mechanism; 21. Trolley; 22. Universal wheel; 23. Lifting platform; 24. Connecting seat; 25. Seat cavity; 26. Hoop. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0022] Embodiment 1

[0023] This embodiment provides a disassembly device for the pin shaft of the hammer arm of a fine crusher, as Figures 1 - 3 shown. This disassembly device includes a hydraulic jacking mechanism 1:

[0024] The hydraulic jacking mechanism 1 includes a two-way hydraulic hollow jack 11. A jacking screw rod 12 is inserted into the hollow shaft rod of the two-way hydraulic hollow jack 11. A stop block 13 is screwed on the jacking screw rod 12 near the base of the two-way hydraulic hollow jack 11. A retaining ring 14 adapted to the hollow shaft rod of the two-way hydraulic hollow jack 11 is fixedly installed on the outer side wall of one end of the stop block 13 adjacent to the base of the two-way hydraulic hollow jack 11. One end of the jacking screw rod 12 near the stop block 13 extends towards the pin shaft of the fine crusher hammer arm and is arranged in contact with the end of the pin shaft of the fine crusher hammer arm.

[0025] During use, the base of the two-way hydraulic hollow jack 11 is abutted against the rotor of the equipment. The jacking screw rod 12 is inserted into the hollow shaft rod of the two-way hydraulic hollow jack 11. Then, a rotatable stop block 13 is screwed on the outer side wall of the jacking screw rod 12 near the rotor of the equipment. The retaining ring 14 on the stop block 13 is arranged in contact with the end of the hollow shaft rod of the two-way hydraulic hollow jack 11. Then, the two-way hydraulic hollow jack 11 is started, so that the hollow shaft rod of the two-way hydraulic hollow jack 11 pushes the jacking screw rod 12, so that the jacking screw rod 12 abuts against the pin shaft of the hammer arm and pushes it out. There is no need for manual knocking to remove the pin, which saves time and effort and has high efficiency.

[0026] Specifically, an input pipe 15 is fixedly installed on the outer side wall of the two-way hydraulic hollow jack 11 at the hydraulic output end. An electric hydraulic pump 16 is fixedly installed at one end of the input pipe 15 away from the two-way hydraulic hollow jack 11. During use, the output end of the electric hydraulic pump 16 and the input end of the two-way hydraulic hollow jack 11 are connected through the input pipe 15, and the electric hydraulic pump 16 is started to drive the shaft pipe of the two-way hydraulic hollow jack 11 to perform bidirectional displacement.

[0027] More specifically, a bottom plate 17 is fixedly installed on the base surface of the two-way hydraulic hollow jack 11. A pressing plate 18 is arranged on one side of the bottom plate 17. At least three support rods 19 that are circumferentially and evenly arranged and are screwed to the bottom plate 17 are fixedly installed on the outer side wall of the pressing plate 18 facing the bottom plate 17. During use, the pressing plate 18 contacts the rotor surface of the equipment, and the two-way hydraulic hollow jack 11 on the bottom plate 17 is supported by the support rods 19, so that there is a certain operating space between the two-way hydraulic hollow jack 11 and the rotor surface of the equipment, facilitating the adjustment of the stop block 13.

[0028] Furthermore, three plugging cavities 110 adapted to the support rods 19 are circumferentially and evenly formed on the bottom plate 17. One end of the support rod 19 away from the pressing plate 18 is plugged into the plugging cavity 110, and limit nuts 111 are screwed on the side wall surfaces of both sides of the plugging cavity 110. During use, the end of the pressing plate 18 with the support rod 19 is aligned with the three plugging cavities 110 on the bottom plate 17 for plugging, and then the support rods 19 on both sides of the bottom plate 17 are screwed and fixed by the limit nuts 111, so as to fix the distance between the bottom plate 17 and the pressing plate 18, facilitating the timely operation and adjustment of the stop block 13 on the jacking screw rod 12.

[0029] Embodiment 2

[0030] Different from Embodiment 1, at the pin shaft position, due to the change in the height of the equipment, there will be a problem of inaccurate alignment. For this reason, the disassembly device further includes an adjustment mechanism 2. The adjustment mechanism 2 includes a trolley 21 and universal wheels 22 fixedly installed at the bottom of the trolley 21. A lifting platform 23 is fixedly installed at the top of the trolley 21, and a connecting seat 24 for fixing the two-way hydraulic hollow jack 11 is movably installed at the top of the lifting platform 23. During use, the two-way hydraulic hollow jack 11 is installed on the connecting seat 24, and then the trolley 21 is pushed to transport the two-way hydraulic hollow jack 11 to the pin shaft position. Subsequently, the height of the two-way hydraulic hollow jack 11 is adjusted through the lifting platform 23, so that the jacking screw rod 12 on the two-way hydraulic hollow jack 11 is aligned with the pin shaft, thereby accurately performing the pin removal work.

[0031] Specifically, a seat cavity 25 for placing the two-way hydraulic hollow jack 11 is formed on the connecting seat 24. A hoop 26 adapted to the outer wall of the two-way hydraulic hollow jack 11 is hinged at the cavity opening of the seat cavity 25 on the connecting seat 24. During use, the two-way hydraulic hollow jack 11 is placed in the seat cavity 25 on the connecting seat 24, and then the hoop 26 is sleeved on the outer wall of the two-way hydraulic hollow jack 11 to fix the two-way hydraulic hollow jack 11 on the connecting seat 24, which is convenient and fast.

[0032] As described above, it is only the preferred specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and its concept of the present application, making equivalent replacements or changes should be covered within the protection scope of the present application.

Claims

1. A device for removing the pin shaft of a hammer arm of a fine crusher, comprising a hydraulic jacking mechanism (1), characterized in that: The hydraulic jacking mechanism (1) comprises a bidirectional hydraulic hollow jack (11), a jacking screw (12) is inserted into the hollow shaft of the bidirectional hydraulic hollow jack (11), a stopper (13) close to the base of the bidirectional hydraulic hollow jack (11) is screwed onto the jacking screw (12), a stopper ring (14) matched with the hollow shaft of the bidirectional hydraulic hollow jack (11) is fixedly mounted on the outer wall of the end of the stopper (13) adjacent to the base of the bidirectional hydraulic hollow jack (11), and the end of the jacking screw (12) close to the stopper (13) extends toward the pin shaft of the hammer arm of the fine crusher and is arranged to abut against the end of the pin shaft of the hammer arm of the fine crusher.

2. The device for removing the pin shaft of a hammer arm of a fine crusher according to claim 1, characterized in that: An input pipe (15) is fixedly mounted on the outer wall of the bidirectional hydraulic hollow jack (11) at the hydraulic output end, and an electric hydraulic pump (16) is fixedly mounted on one end of the input pipe (15) away from the bidirectional hydraulic hollow jack (11).

3. The device for removing the hammer arm pin of a fine crusher according to claim 1, characterized in that: A bottom plate (17) is fixedly mounted on the base surface of the bidirectional hydraulic hollow jack (11), a pressure plate (18) is arranged on one side of the bottom plate (17), and at least three support rods (19) that are evenly arranged in the circumferential direction and are screwed to the bottom plate (17) are fixedly mounted on the outer side wall of the pressure plate (18) facing the bottom plate (17).

4. The device for removing the hammer arm pin of a fine crusher according to claim 3 is characterized in that: The bottom plate (17) is evenly provided with three insertion cavities (110) adapted to the support rods (19) on the circumference thereof; one end of the support rod (19) away from the pressure plate (18) is inserted into the insertion cavity (110) and limit nuts (111) are screwed onto the wall surfaces on both sides of the insertion cavity (110).

5. The device for removing the hammer arm pin of a fine crusher according to claim 1, characterized in that: The disassembly device also includes an adjustment mechanism (2), the adjustment mechanism (2) including a trolley (21) and a universal wheel (22) fixedly mounted on the bottom of the trolley (21), a lifting platform (23) fixedly mounted on the top of the trolley (21), and a connecting seat (24) for fixing a bidirectional hydraulic hollow jack (11) movably mounted on the top of the lifting platform (23).

6. The device for removing the hammer arm pin of a fine crusher according to claim 5, characterized in that: The connection seat (24) is provided with a seat cavity (25) for accommodating a bidirectional hydraulic hollow jack (11), and a hoop (26) adapted to the outer wall of the bidirectional hydraulic hollow jack (11) is hingedly connected to the connection seat (24) at the opening of the seat cavity (25).

Images