A square box breaker for coal mining

Abstract

The application discloses a coal mining square box crusher and relates to the technical field of crushers; the crusher comprises a crushing box, a crushing assembly, a driving assembly and a guiding assembly; the guiding assembly comprises multiple groups of parallelly-installed primary support rods, secondary support rods and tertiary support rods which are connected through universal joints; the secondary support rods are located above the crushing assembly and are transversely installed; the ends of the primary support rods and the tertiary support rods, which are away from the secondary support rods, are respectively inclined away from the crushing assembly; the tertiary support rods are rotationally connected to connecting seats on the inner wall of the crushing box; the primary support rods are connected to transmission gears; the crushing box is rotationally installed with auxiliary gears which are sequentially connected to the transmission gears; and the auxiliary gears are connected to a primary motor. The device can guide when large stone blocks are crushed, improve the crushing efficiency of large stone blocks and avoid crushing dead angles.

Description

Technical Field

[0001] This invention relates to the field of crusher technology, specifically a box crusher for coal mining. Background Technology

[0002] Box crushers, also known as heavy hammer crushers or square box crushers, are a new generation of crushing machinery. They are manufactured by absorbing advanced technologies from both domestic and international sources, integrating the principles of ordinary heavy hammer crushers, impact crushers, vertical shaft impact crushers, and various other machines that use hammers to crush stone. Through optimized design, they have changed the method of controlling the size of discharged particles using grates, reducing hammer wear within the crushing chamber and extending hammer life. Box crushers are particularly suitable for crushing coal and ore.

[0003] Box-type crushers can break large stones into smaller pieces by gradually peeling them apart. To ensure that large stones accurately contact the hammers, multiple sets of transverse support rods can be installed above the rotor structure. This allows large stones to remain on the machine during crushing, facilitating repeated peeling. However, the support rods form a near-planar structure, and the hammers apply force in the same direction throughout. This can easily cause stones to be knocked to one side after they shrink, making them harder to crush. Furthermore, the crushing process is also focused on a single surface, which can lead to difficulties in further crushing after a certain point. Summary of the Invention

[0004] The purpose of this invention is to provide a box crusher for coal mining to solve the problems mentioned in the background art. It provides a device capable of guiding the position of large boulders, ensuring the boulders are always in the most easily crushed position, and adjusting the direction of the boulders at any time to improve crushing efficiency, thereby increasing overall crushing efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A coal mine crusher includes a crushing box, a crushing assembly, a drive assembly, and a guide assembly. The guide assembly includes multiple sets of parallel-installed primary, secondary, and tertiary support rods connected by universal joints. The secondary support rods are located above the crushing assembly and installed laterally. The ends of the primary and tertiary support rods away from the secondary support rods are inclined away from the crushing assembly. The tertiary support rods are rotatably connected to a connecting seat located on the inner wall of the crushing box. The primary support rods are connected to transmission gears. Auxiliary gears, sequentially connected to each transmission gear, are rotatably installed on the crushing box. The auxiliary gears are connected to a primary motor.

[0007] As a further aspect of the present invention: the crushing box is equipped with a vertical straight screen plate and a semi-cylindrical curved screen plate, and the crushing box has a feed inlet on the side away from the straight screen plate.

[0008] As a further embodiment of the present invention: the straight screen plate is connected to the curved screen plate, and both the straight screen plate and the curved screen plate have multiple sets of through holes.

[0009] As a further embodiment of the present invention: a crushing assembly is installed on the inner side of the curved screen plate, the crushing assembly includes a crushing shaft rotatably connected to the crushing box, a plurality of annular mounting discs are installed on the crushing shaft, and a plurality of hammers protruding from the mounting discs are rotatably installed between the mounting discs.

[0010] As a further aspect of the present invention: the vertical position of the mounting plate corresponds one-to-one with the position of each group of secondary support rods.

[0011] As a further embodiment of the present invention: the two ends of the crushing shaft extend out of the crushing box and are connected to the grooved wheel, the grooved wheel is connected to the drive assembly, the drive assembly includes a secondary motor and a pulley, the secondary motor is connected to the pulley, and the pulley is connected to the grooved wheel through multiple sets of transmission belts.

[0012] As a further embodiment of the present invention: the bottom of the crushing box is a discharge port, and multiple sets of reinforcing ribs are installed on the outside of the crushing box.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The above-mentioned coal mining box crusher is equipped with a guide assembly. The primary, secondary, and tertiary support rods of the guide assembly form a trapezoidal structure. The secondary support rod remains horizontal and is embedded between the hammers. After a large stone is fed in, the stone is hammered and displaced by the hammers. Under the action of the trapezoidal structure, it returns to the area above the secondary support rod, thereby guiding the position of the stone and enabling it to fully contact the hammers for rapid crushing.

[0015] The aforementioned box crusher for coal mining utilizes a trapezoidal structure that allows for a lower sag of the secondary support rods, increasing the distance at which the hammers can contact the rocks. Furthermore, the use of transmission and auxiliary gears ensures that all secondary support rods rotate continuously in the same direction under the action of universal joints. Consequently, the rocks supported by the secondary support rods rotate along with them, causing the contact surface with the hammers to constantly change. This ensures that the hammers always contact the area conducive to hammering, improving hammering efficiency and achieving more efficient crushing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a box crusher for coal mining.

[0017] Figure 2 This is a structural schematic diagram of the external appearance of a box crusher for coal mining.

[0018] Figure 3 This is a schematic diagram of the internal structure of a box crusher for coal mining.

[0019] Figure 4 This is a schematic diagram of the crushing components in a box crusher for coal mining.

[0020] Figure 5 This is a schematic diagram of the guiding components in a box crusher for coal mining.

[0021] In the diagram: 1. Crushing box; 2. Straight screen plate; 3. Through hole; 4. Guide assembly; 5. Primary support rod; 6. Universal joint; 7. Secondary support rod; 8. Tertiary support rod; 9. Connecting seat; 10. Feed inlet; 11. Crushing assembly; 12. Hammer; 13. Mounting plate; 14. Crushing shaft; 15. Curved screen plate; 16. Discharge port; 17. Reinforcing rib; 18. Secondary motor; 19. Pulley; 20. Drive belt; 21. Drive assembly; 22. Grooved wheel; 23. Primary motor; 24. Auxiliary gear; 25. Transmission gear. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1

[0024] Please see Figure 1 , Figure 3 , Figure 4 and Figure 5 In Embodiment 1 of the present invention, a coal mine crushing box includes a crushing box 1, a crushing assembly 11, a drive assembly 21, and a guide assembly 4. The guide assembly 4 includes multiple sets of parallel-installed primary support rods 5, secondary support rods 7, and tertiary support rods 8 connected by universal joints 6. The secondary support rods 7 are located above the crushing assembly 11 and installed laterally. The ends of the primary support rods 5 and tertiary support rods 8 away from the secondary support rods 7 are respectively inclined in a direction away from the crushing assembly 11. The tertiary support rods 8 are rotatably connected to a connecting seat 9 located on the inner wall of the crushing box 1. The primary support rods 5 pass through a connecting transmission gear 25. An auxiliary gear 24 is rotatably installed on the crushing box 1, which is sequentially connected to each transmission gear 25. The auxiliary gear 24 is connected to a primary motor 23.

[0025] This device uses a guide assembly 4 installed above the crushing assembly 11. The guide assembly 4 consists of multiple sets of parallel trapezoidal structures. Each trapezoidal structure comprises a primary support rod 5, a secondary support rod 7, and a tertiary support rod 8, connected by a universal joint 6, thus allowing rotational transmission. Due to the limited installation space on both sides, the secondary support rod 7 remains horizontal at all times. During operation, large stones are thrown in from the outside and fall onto the plane formed by the multiple sets of secondary support rods 7. Because the secondary support rods 7 are embedded between the hammer heads 12, the hammer heads 12 can strike the stone from the bottom during rotation, gradually removing the fragments. During the striking process, the stone is pushed in one direction, and the inverted trapezoidal structures on both sides ensure that the stone returns to the area above the secondary support rods 7 after being pushed, thus ensuring that the stone always maintains full contact with the hammer heads 12 and avoiding dead zones in the crushing process.

[0026] While correcting the position, the guide component 4 can also push the stone to rotate. Each group of primary support rods 5 is connected in sequence through transmission gear 25 and auxiliary gear 24. After the primary motor 23 starts, all the primary support rods 5 rotate in the same direction, driving each group of secondary support rods 7 to rotate in the same direction. Therefore, the stone on the surface of the secondary support rod 7 can also rotate, and the contact surface with the hammer head 12 changes continuously, which facilitates full pounding and improves the crushing efficiency. Although the rotation speed of the secondary support rod 7 is not uniform after using the universal joint 6, the rotation speed of each group of secondary support rods 7 is consistent, so it will not cause mutual interference.

[0027] Example 2

[0028] Please see Figures 1-5 The main difference between Example 2 and Example 1 is that:

[0029] Please see Figure 1 and Figure 3 In Embodiment 2 of the present invention, the crushing box 1 is equipped with a vertical straight screen plate 2 and a semi-cylindrical curved screen plate 15. The crushing box 1 has a feed inlet 10 on the side away from the straight screen plate 2. The curved screen plate 15 surrounds the crushing assembly 11 at the bottom, so that all the stones can be fully crushed, and the straight screen plate 2 cooperates to increase the filtration area.

[0030] Please see Figure 1 and Figure 3 The straight screen plate 2 is connected to the curved screen plate 15, and both the straight screen plate 2 and the curved screen plate 15 have multiple sets of through holes 3. The through holes 3 are used to filter small stones of the correct size.

[0031] Please see Figure 1 , Figure 3 and Figure 4A crushing assembly 11 is installed inside the curved screen plate 15. The crushing assembly 11 includes a crushing shaft 14 rotatably connected to the crushing box 1. Multiple sets of annular mounting discs 13 are mounted on the crushing shaft 14, and multiple sets of hammers 12 protruding from the mounting discs 13 are rotatably mounted between the mounting discs 13. The crushing assembly 11 drives the mounting discs 13 to rotate through the rotation of the crushing shaft 14, thereby causing the hammers 12 to rotate as well. Under the action of huge rotational inertia, the hammers 12 open outward and crush the stones.

[0032] Please see Figure 1 and Figure 3 The vertical position of the mounting plate 13 corresponds one-to-one with the position of each set of secondary support rods 7. The position of the secondary support rods 7 corresponds to the position of each mounting plate 13, that is, the hammer head 12 can pass through the gap of the secondary support rods 7 to reach the top without damaging the secondary support rods 7, so that the hammer head 12 can fully crush the large rocks above.

[0033] Please see Figures 2-4 The crushing shaft 14 extends through the crushing box 1 at both ends and connects to the grooved pulley 22. The grooved pulley 22 is connected to the drive assembly 21. The drive assembly 21 includes a secondary motor 18 and a pulley 19. The secondary motor 18 is connected to the pulley 19, and the pulley 19 is connected to the grooved pulley 22 via multiple sets of transmission belts 20. The drive assembly 21 controls the pulley 19 through the secondary motor 18, and then uses the transmission belts 20 to drive the rotation of the grooved pulley 22, thereby driving the crushing shaft 14.

[0034] Please see Figure 1 and Figure 3 The bottom of the crushing box 1 has a through-hole 16 for discharging. Multiple sets of reinforcing ribs 17 are installed on the outside of the crushing box 1. Crushed small stones pass through the through holes 3 on the straight screen plate 2 and the curved screen plate 15, falling directly to the bottom of the crushing box 1 and being discharged directly from the open discharge port 16. The reinforcing ribs 17 strengthen the overall structure, reducing deformation, improving stability, and extending service life for a structure subjected to continuous high-intensity impacts under such working conditions.

[0035] The working principle of this invention is:

[0036] This device utilizes a guide assembly 4 located above the crushing component 11. The unit structure of the guide assembly 4 consists of an inverted trapezoidal structure formed by primary support rods 5, secondary support rods 7, and tertiary support rods 8. The guide assembly 4 is composed of multiple sets of these parallel inverted trapezoidal structures. Under the action of the universal joint 6, all secondary support rods 7 can be controlled to rotate in the same direction. The secondary support rods 7 are embedded in the gaps between the hammers 12. During operation, when a stone falls onto a secondary support rod 7, it is restrained and automatically returns to that area, preventing it from rolling into a dead corner. Simultaneously, it promotes the rotation of the stone, facilitating the peeling and crushing of different areas of the stone, thus improving crushing efficiency. This device effectively improves the working condition of the crusher when crushing large stones, increases crushing efficiency, and avoids crushing dead corners.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A coal mine crushing box crusher, comprising a crushing box, a crushing assembly, a drive assembly, and a guide assembly; characterized in that, The guiding assembly includes multiple sets of parallel-installed primary, secondary, and tertiary support rods connected by universal joints. The secondary support rods are located above the crushing assembly and installed laterally. The ends of the primary and tertiary support rods away from the secondary support rods are inclined away from the crushing assembly. The tertiary support rod is rotatably connected to a connecting seat located on the inner wall of the crushing chamber. The primary support rod is connected to a transmission gear. An auxiliary gear is rotatably installed on the crushing chamber, which is sequentially connected to each transmission gear. The auxiliary gear is connected to a primary motor. A crushing assembly is installed on the inner side of the curved screen plate. The crushing assembly includes a crushing shaft that is rotatably connected to the crushing box. Multiple sets of annular mounting discs are installed on the crushing shaft, and multiple sets of hammers protruding from the mounting discs are rotatably installed between the mounting discs. The hammerhead and the secondary support rod are arranged in an alternating vertical position. During rotation, the hammerhead extends from between the two secondary support rods to strike the bottom of the stone.

2. The coal mining box crusher according to claim 1, characterized in that, The crushing box is equipped with a vertical straight screen plate and a semi-cylindrical curved screen plate, and the crushing box has a feed inlet on the side away from the straight screen plate.

3. The coal mining box crusher according to claim 2, characterized in that, The straight screen plate is connected to the curved screen plate, and both the straight screen plate and the curved screen plate have multiple sets of through holes.

4. The coal mining box crusher according to claim 3, characterized in that, The crushing shaft extends through the crushing box at both ends and connects to the grooved wheel. The grooved wheel connects to the drive assembly. The drive assembly includes a secondary motor and a pulley. The secondary motor connects to the pulley, and the pulley is connected to the grooved wheel via multiple sets of transmission belts.

5. The coal mining box crusher according to claim 1 or 2, characterized in that, The bottom of the crushing box serves as the discharge port, and multiple sets of reinforcing ribs are installed on the outside of the crushing box.

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