Double-geared roller crusher for coal mine

Abstract

The utility model relates to the field of crushing equipment, in particular to a double-geared roller crusher for a coal mine, which comprises a support mechanism for mounting and fixing and a power mechanism for providing power, and the power mechanism is mounted on the support mechanism. The crushing mechanism is used for crushing a coal mine, the adjusting mechanism is used for adjusting the state of the crushing mechanism to avoid jamming, the crushing mechanism is connected to the power output end of the power mechanism through a conduction mechanism, and the adjusting mechanism is mounted between the conduction mechanism and the crushing mechanism. By means of the rotary swing crushing block, self-adaptive adjustment is conducted through adjustment of the adjusting mechanism at the moment that the swing crushing block is stuck, the pressure applying effect on a coal mine is improved at the same time, the problem of sticking is solved, the crushing effect is improved at the same time, and therefore the stability and high efficiency of equipment operation are improved.

Description

Technical Field

[0001] The utility model relates to the field of crushing equipment, in particular to a double-toothed roll crusher for coal mines. Background Art

[0002] The double-toothed roll crusher for coal mines is a device designed specifically for coal crushing. Its core consists of two oppositely rotating toothed rolls, which crush materials through comprehensive actions such as shearing, extrusion, and splitting. This device is suitable for processing brittle materials such as raw coal and coal gangue, can effectively control the discharge particle size (usually ≤ 300 mm), reduce the phenomenon of over-crushing, and improve the subsequent washing or combustion efficiency. Its structure includes modules such as a motor, a speed reducer, a hydraulic coupling, wear-resistant toothed rolls, and an automatic lubrication system. Some models adopt modular design to adapt to the narrow space underground and have explosion-proof performance. Compared with traditional crushers, the double-toothed roll crusher has advantages such as low energy consumption, low noise, and convenient maintenance. For example, it adopts a full thin oil lubrication or intelligent lubrication system to extend the bearing life, and realizes precise control of the particle size by hydraulically adjusting the toothed roll gap. In addition, the application of special tooth profiles (such as parallel arrangement or spiral teeth) and high-strength wear-resistant alloy materials further improves the durability and crushing efficiency of the device under complex working conditions.

[0003] In the prior art, the Chinese utility model with the publication number CN221982502U discloses a double-roll crusher for coal mines, which crushes through easily detachable roll teeth. However, it is found during the operation of such devices that because existing double-roll crushers all adopt opposite extrusion for crushing, when a single-directional crushing force encounters large coal blocks or hard blocks, although the force is sufficient, there is a phenomenon of jamming due to the single direction, resulting in the need to frequently replace the roll teeth, which affects the crushing efficiency and the stable operation effect of the device. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a double-toothed roll crusher for coal mines in order to solve the above problems.

[0005] The present utility model realizes the above purpose through the following technical solutions:

[0006] A double-toothed roll crusher for coal mines includes a support mechanism for installation and fixation and a power mechanism for providing power. The power mechanism is installed on the support mechanism, and further includes a crushing mechanism for crushing coal mines and an adjusting mechanism for adjusting the state of the crushing mechanism to avoid jamming. The crushing mechanism is connected to the power output end of the power mechanism through a transmission mechanism, and the adjusting mechanism is installed between the transmission mechanism and the crushing mechanism;

[0007] The conduction mechanism includes a main shaft that horizontally penetrates the support mechanism. A number of rotating frames are arranged in an array on the main shaft. A spline shaft is provided on the part of the main shaft inside the support mechanism. A number of inner extrusion disks and rotating frames are key-connected to the outside of the spline shaft. The inner extrusion disks are arranged in the gaps between two adjacent rotating frames.

[0008] The crushing mechanism includes a grinding assembly composed of several groups of swinging crushing blocks and adapting shafts. Each group of grinding assemblies is arranged outside the inner extrusion disk. The same group of grinding assemblies is arranged in a circumferential array on the rotating frame. The grinding assembly includes a swinging crushing block, an adapting shaft, and a limiting block. The swinging crushing block is rotatably connected to the rotating frame through the adapting shaft. Limiting blocks are arranged at the central positions between two adjacent swinging crushing blocks. The swinging crushing block has a concave structure with an opening facing outward. The end face of the swinging crushing block cooperates with the rotating frame through an adjusting mechanism.

[0009] Preferably, each group of swinging crushing blocks has 5 pieces. From the outside to the inside, the swinging crushing block is respectively a crushing part, a central part, and an impact part. The crushing part is the protruding position of the concave structure. The central part is the rotating position. The impact part is the impact position corresponding to impacting the inner extrusion disk.

[0010] With such a setting, using the power during the rotation of the rotating frame, combined with the centrifugal force, gravity received by the crushing part, and the force of mutual extrusion between the two side crushing parts, the coal mine is crushed. And the protruding position on the crushing part is the main crushing position.

[0011] Preferably, the adjusting mechanism includes a crushing extrusion ring, an extrusion block, and an extrusion spring. Two extrusion blocks are formed on the end face of the central part corresponding to one side of the rotating frame. A crushing extrusion ring is fixedly connected to the rotating frame corresponding to the end face of the extrusion block. An auxiliary extrusion groove is formed in the crushing extrusion ring corresponding to the position of the extrusion block. An extrusion spring is arranged between the other end face of the central part and the rotating frame. The extrusion spring is wrapped outside the adapting shaft.

[0012] With such a setting, when the coal mine gets stuck between the squeezes of the two side crushing parts, that is, when the one-way opposite squeezing force cannot crush the coal mine in time, at this time, the crushing part undergoes a lateral shift in the direction of the adapting shaft between the squeezes of the crushing extrusion ring and the extrusion block. At this time, the force exerted on the coal mine by the two side crushing parts changes from a single opposite squeeze to an additional torsional squeeze. Thus, the coal mine is crushed by multi-directional forces, avoiding jamming and improving the crushing effect at the same time.

[0013] Preferably, the extrusion block has a spherical structure, and the size of the auxiliary extrusion groove is 1.2 times the size of the extrusion block.

[0014] With such a setting, by utilizing the mechanical fitting clearance of the extrusion block, there is a shaking clearance for the swinging crushing block during rotational extrusion crushing, and the reset can also be ensured during resetting.

[0015] Preferably: the thickness of the crushing part is twice the size of the central part, and the two end faces of the crushing part are in sliding fit with the rotating frame.

[0016] Preferably: the bottom of the impact part is in cooperation with the inner extrusion disc, and under the limitation of the inner extrusion disc and the limiting block, the rotation angle range of the impact part is 0° - 15°.

[0017] With such a setting, by using the limitation of the rotation angle, it is ensured that when the crushing part is driven by the rotating frame to revolve and is also restricted by the adaptation shaft to rotate, the protruding position of the crushing part can always be higher than the rotating frame, ensuring the effect of extrusion crushing.

[0018] Preferably: impact blocks are formed on the end face of the crushing part corresponding to the limiting block.

[0019] With such a setting, the quality of the swinging crushing block itself is improved.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] By using the rotating swinging crushing block, when the swinging crushing block encounters jamming, through the adjustment of the adjustment mechanism, adaptive adjustment is carried out, and at the same time, the pressing effect on the coal mine is improved. While solving the jamming problem, the crushing effect is improved, thereby improving the stability and efficiency of the equipment operation. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0023] Figure 1 is the structural schematic diagram of a double-toothed roll crusher for coal mines according to the present utility model;

[0024] Figure 2 is the combined structural schematic diagram of two sets of crushing mechanisms of a double-toothed roll crusher for coal mines according to the present utility model;

[0025] Figure 3 is the structural schematic diagram of the transmission mechanism of a double-toothed roll crusher for coal mines according to the present utility model;

[0026] Figure 4It is a schematic structural diagram of the crushing mechanism of a double-toothed roll crusher for coal mines described in the present utility model;

[0027] Figure 5 It is the first axonometric view of the cooperation between the swing crushing block and the adjusting mechanism of a double-toothed roll crusher for coal mines described in the present utility model;

[0028] Figure 6 It is the second axonometric view of the cooperation between the swing crushing block and the adjusting mechanism of a double-toothed roll crusher for coal mines described in the present utility model;

[0029] Figure 7 It is a schematic structural diagram of the initial failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model;

[0030] Figure 8 It is a schematic structural diagram of the torsional failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model;

[0031] Figure 9 It is a partial detail schematic diagram of the initial failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model;

[0032] Figure 10 It is a partial detail schematic diagram of the torsional failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model;

[0033] Figure 11 It is a cross-sectional view of the initial failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model;

[0034] Figure 12 It is a cross-sectional view of the torsional failure state of the swing crushing block of a double-toothed roll crusher for coal mines described in the present utility model.

[0035] The description of the reference numerals is as follows:

[0036] 1. Support mechanism; 2. Power mechanism; 3. Conduction mechanism; 4. Crushing mechanism; 5. Adjusting mechanism; 31. Rotating frame; 32. Main shaft; 33. Spline shaft; 34. Inner extrusion disk; 41. Swing crushing block; 42. Adaptation shaft; 43. Limit block; 411. Crushing part; 412. Central part; 413. Impact part; 51. Crushing extrusion ring; 52. Extrusion block; 53. Extrusion spring; 511. Auxiliary extrusion groove. Detailed implementation method

[0037] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0038] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0039] The present utility model will be further described below with reference to the drawings:

[0040] As Figures 1 - 12 shown, a double-toothed roll crusher for coal mines includes a support mechanism 1 for installation and fixation and a power mechanism 2 for providing power. The power mechanism 2 is installed on the support mechanism 1. It further includes a crushing mechanism 4 for crushing coal and an adjusting mechanism 5 for adjusting the state of the crushing mechanism 4 to avoid jamming. The crushing mechanism 4 is connected to the power output end of the power mechanism 2 through a transmission mechanism 3, and the adjusting mechanism 5 is installed between the transmission mechanism 3 and the crushing mechanism 4;

[0041] The transmission mechanism 3 includes a main shaft 32. The main shaft 32 runs horizontally through the support mechanism 1. A number of rotating frames 31 are arranged in an array on the main shaft 32. A spline shaft 33 is provided on the part of the main shaft 32 inside the support mechanism 1. A number of inner extrusion disks 34 and rotating frames 31 are key-connected to the outside of the spline shaft 33. The inner extrusion disks 34 are arranged in the gaps between two rotating frames 31;

[0042] The crushing mechanism 4 includes a grinding assembly consisting of several groups of swinging crushing blocks 41 and adaptive shafts 42. Each group of grinding assemblies is arranged on the outside of the inner extrusion plate 34, and the same group of grinding assemblies is arranged in a circular array on the rotating frame 31. The grinding assembly includes a swinging crushing block 41, an adaptive shaft 42, and a limit block 43. The swinging crushing block 41 is rotatably connected to the rotating frame 31 through the adaptive shaft 42. A limit block 43 is set at the center position between the two swinging crushing blocks 41. The swinging crushing block 41 is a concave structure with an opening facing outward. The end face of the swinging crushing block 41 is matched with the rotating frame 31 through the adjustment mechanism 5.

[0043] In this embodiment, each group of swing crushing blocks 41 is provided with 5, and the swing crushing blocks 41 are respectively a crushing part 411, a center part 412, and an impact part 413 from the outside to the inside. The crushing part 411 is a protruding position of a concave structure, the center part 412 is a rotating position, and the impact part 413 is an impact position corresponding to the impact of the inner extrusion disk 34. The power of the rotating frame 31 during rotation, combined with the centrifugal force and gravity on the crushing part 411, and the force of mutual squeezing of the crushing parts 411 on both sides, is used to crush the coal mine, and the protruding position on the crushing part 411 is the main crushing position.

[0044] The cam 52 is pressed against the work surface 521 and the cam 52 is pressed against the work surface 532. The cam 52 is pressed against the work surface 533 and the cam 52 is pressed against the work surface 534.

[0045] In this embodiment, the extrusion block 52 is a spherical structure, and the size of the auxiliary extrusion groove 511 is 1.2 times the size of the extrusion block 52. By utilizing the mechanical fitting clearance of the extrusion block 52, the swing crushing block 41 has a shaking gap during the rotational extrusion crushing, and can also ensure reset during reset.

[0046] In this embodiment, the thickness of the crushing portion 411 is twice the size of the central portion 412 , and both side end surfaces of the crushing portion 411 are in sliding engagement with the rotating frame 31 .

[0047] In this embodiment, the bottom of the impact part 413 cooperates with the inner extrusion disk 34. Under the limitation of the inner extrusion disk 34 and the limit block 43, the rotation angle range of the impact part 413 is 0°-15°. By restricting the rotation angle, it is ensured that when the crushing part 411 is driven by the rotating frame 31 to revolve and is restricted by the adaptation shaft 42 to rotate, the protruding position of the crushing part 411 can always be higher than the rotating frame 31, ensuring the effect of extrusion crushing.

[0048] In this embodiment, an impact block is formed on the end face of the crushing part 411 corresponding to the limit block 43, improving the quality of the swinging crushing block 41 itself.

[0049] Working principle: When the equipment is running, coal mines are poured into the inside of the support mechanism 1 through the feed inlet at the top of the support mechanism 1. The motor (not shown) outside the power mechanism 2 is started, and the main shaft 32 is driven to rotate through the reduction part. The two main shafts 32 drive the two groups of rotating frames 31 to rotate, and then the swinging crushing blocks 41 on the rotating frames 31 are driven to rotate in opposite directions to extrude and crush the coal mines.

[0050] After the coal mines reach between the swinging crushing blocks 41 rotating in opposite directions, the swinging crushing blocks 41 on both sides apply opposite pressures to the coal mines, and the coal mines are extruded and crushed. At the same time, since the crushing part 411 on the swinging crushing block 41 is of a concave structure, the stress points of the coal mines are increased, thus ensuring the crushing effect. When the coal mines are stuck between the squeezes of the crushing parts 411 on both sides, that is, when the opposite squeezing force in a single direction cannot crush the coal mines in time, at this time, the crushing part 411 is under the cooperation of the crushing extrusion ring 51 and the extrusion block 52, as Figure 12 shown. Because one end of the crushing extrusion ring 51 is fixed by the front rotating frame 31 and does not rotate, while the extrusion block 52 and the swinging crushing block 41 will rotate as a whole, the hemispherical structure of the extrusion block 52 and the auxiliary extrusion groove 511 on the crushing extrusion ring 51 are misaligned and extruded. Then the extrusion block 52 is extruded from the inside of the auxiliary extrusion groove 511 (as shown by the dotted line misalignment in Figure 12 ). After the extrusion block 52 is extruded, the extrusion force is transmitted to the swinging crushing block 41, and the swinging crushing block 41 itself is restricted by the adaptation shaft 42. Then the extrusion force will cause the swinging crushing block 41 to move backward as a whole. At this time, the extrusion and crushing force of the crushing block 41 on the stones increases from the simple rotation and opposite extrusion to the extrusion misalignment force of axial transverse movement. An extrusion spring 53 is arranged between the rear rotating frame 31 and the swinging crushing block 41. At this time, the extrusion spring 53 is extruded and stores energy. While the extrusion force drives the crushing part 411 to rotate, it also undergoes a transverse movement in the axial direction of the adaptation shaft 42. At this time, the force applied by the crushing parts 411 on both sides to the coal mines increases from a single opposite extrusion to a torsional extrusion, cooperating with the revolution of the swinging crushing block 41 itself, as Figures 9 to 10 the change, so as to crush the coal mines with multi-directional forces, avoid jamming and improve the crushing effect at the same time.

[0051] After the coal mine is squeezed and broken, the swinging crushing block 41 loses the extrusion force of the stone. At this time, the swinging crushing block 41 is in a free state. At the same time, due to the rotation of the main shaft 32, the swinging crushing block 41 is affected by centrifugal force, and the extrusion spring 53 supports the swinging crushing block 41. Using the spherical fit between the extrusion block 52 and the crushing extrusion ring 51, the swinging crushing block 41 and the extrusion block 52 on the swinging crushing block 41 are subjected to the reset power (centrifugal force) and the extrusion force of the extrusion spring 53. The extrusion block 52 will be squeezed into the auxiliary extrusion groove 511 along the contour of the auxiliary extrusion groove 511, then the swinging crushing block 41 will also slowly rotate and reset following the extrusion between the extrusion block 52 and the auxiliary extrusion groove 511 (such as Figure 11 the overlapping of the dotted lines in the figure), which is convenient for the swinging crushing block 41 to reset, so as to cope with the next impact crushing.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A double-toothed roll crusher for coal mines, comprising a support mechanism (1) for installation and fixation and a power mechanism (2) for providing power, wherein the power mechanism (2) is installed on the support mechanism (1), and is characterized in that: It further includes a crushing mechanism (4) for crushing coal mines and an adjusting mechanism (5) for adjusting the state of the crushing mechanism (4) to avoid jamming. The crushing mechanism (4) is connected to the power output end of the power mechanism (2) through a transmission mechanism (3), and the adjusting mechanism (5) is installed between the transmission mechanism (3) and the crushing mechanism (4); The transmission mechanism (3) includes a main shaft (32). The main shaft (32) horizontally penetrates the support mechanism (1). A number of rotating frames (31) are arranged in an array on the main shaft (32). A spline shaft (33) is arranged on the part of the main shaft (32) inside the support mechanism (1). A number of inner extrusion discs (34) and rotating frames (31) are key-connected to the outside of the spline shaft (33). The inner extrusion discs (34) are arranged in the gaps between two of the rotating frames (31); The crushing mechanism (4) includes a grinding assembly composed of several groups of swing crushing blocks (41) and adaptation shafts (42). Each group of grinding assemblies is arranged outside the inner extrusion disc (34). The same group of grinding assemblies is arranged in a circumferential array on the rotating frame (31). The grinding assembly includes a swing crushing block (41), an adaptation shaft (42), and a limiting block (43). The swing crushing block (41) is rotatably connected to the rotating frame (31) through the adaptation shaft (42). Limiting blocks (43) are arranged at the central positions between two of the swing crushing blocks (41). The swing crushing block (41) is of a concave structure with an opening facing outwards. The end face of the swing crushing block (41) cooperates with the rotating frame (31) through the adjusting mechanism (5).

2. The double-toothed roll crusher for coal mines according to claim 1, wherein: Each group of the swing crushing blocks (41) has 5. The swing crushing blocks (41) are, from the outside to the inside, a crushing part (411), a central part (412), and an impact part (413). The crushing part (411) is the protruding position of the concave structure. The central part (412) is the rotating position. The impact part (413) is the impact position corresponding to impacting the inner extrusion disc (34).

3. The double-toothed roll crusher for coal mines according to claim 2, characterized in that: The adjusting mechanism (5) includes a crushing extrusion ring (51), extrusion blocks (52), and an extrusion spring (53). Two extrusion blocks (52) are formed on the end face of the central part (412) corresponding to one side of the rotating frame (31). A crushing extrusion ring (51) is fixedly connected to the end face of the rotating frame (31) corresponding to the extrusion blocks (52). An auxiliary extrusion groove (511) is formed in the crushing extrusion ring (51) at the position corresponding to the extrusion blocks (52). An extrusion spring (53) is arranged between the other end face of the central part (412) and the rotating frame (31). The extrusion spring (53) is wrapped outside the adaptation shaft (42).

4. The double-toothed roll crusher for coal mines according to claim 3, characterized in that: The extrusion blocks (52) are of a spherical structure. The size of the auxiliary extrusion groove (511) is 1.2 times the size of the extrusion blocks (52).

5. The double-toothed roll crusher for coal mines according to claim 2, characterized in that: The thickness of the crushing part (411) is 2 times the size of the central part (412). The two end faces of the crushing part (411) are in sliding fit with the rotating frame (31).

6. The double-toothed roll crusher for coal mines according to claim 5, characterized in that: The bottom of the impact part (413) cooperates with the inner extrusion disc (34). Under the limitation of the inner extrusion disc (34) and the limit block (43), the rotation angle range of the impact part (413) is 0°-15°.

7. The double-toothed roll crusher for coal mines according to claim 6, characterized in that: The crushing part (411) is formed with impact blocks corresponding to the end faces of the limit blocks (43).

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