Coal sieving device and coal mill

Abstract

The invention provides a coal screening device and a coal mill. The coal screening device and the coal mill are used for solving the problem that in the prior art, coal cannot be fully ground through a coal mill. The screening device comprises a shell, a screening plate, an adjusting plate, an adjusting assembly and a first driving mechanism. The coal screening device is arranged in the coal mill to screen coal crushed in the crushing cavity, it is guaranteed that coal particles entering the coal storage cavity are all in the expected size, and it is guaranteed that the coal can be fully combusted; besides, a first driving mechanism is arranged to drive the screening plate to rotate with the lower end as the center, then the coal briquettes can be driven to be gathered towards the discharging opening and then conveyed out of the shell, the effect of disturbing the coal briquettes can be achieved, and the coal briquettes are prevented from being blocked in the first screening holes; in addition, an adjusting assembly and an adjusting plate are further arranged to adjust the size of the first screening opening of the screening plate, so that the coal mill can adapt to different application scenes, and the universality is improved.

Description

Technical Field

[0001] The invention belongs to the field of thermal power generation, and in particular relates to a coal screening device and a coal mill. Background Art

[0002] Electricity is an energy source that uses electrical energy as a driving force. Thermal power generation is the main method of producing electrical energy in my country. When generating electricity, by utilizing the heat energy generated by the combustion of combustibles in the boiler, there are three types of energy conversion processes in thermal power generation: fuel chemical energy-steam thermal energy-mechanical energy-electrical energy. Simply put, it uses the heat of fuel to heat water to form high-temperature and high-pressure superheated steam, and then the steam enters the steam turbine along the pipeline and continues to expand and do work, impacting the turbine rotor to rotate at high speed, driving the generator rotor (electromagnetic field) to rotate, and the stator coil cuts the magnetic lines of force to generate electrical energy, and then uses the step-up transformer to increase the voltage to the system voltage, connect to the system grid, and transmit electrical energy to the outside.

[0003] Coal is usually used in thermal power generation. When the coal is transported from the coal plant to the thermal power station, the coal is uneven in size and many of them are coal lumps. It is difficult for the coal lumps to burn fully in the boiler. Therefore, before putting the coal into the boiler, the coal needs to be ground, that is, the coal lumps are ground into smaller coal particles for full combustion.

[0004] When the existing coal mill is grinding coal, some larger coal pieces will enter the coal storage chamber through the gap between the crushing teeth of two relatively arranged crushing rods, resulting in incomplete combustion when the coal in the coal storage chamber is subsequently put into the boiler for combustion. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a coal screening device and a coal mill, so as to solve the problem that the coal mill in the prior art cannot fully grind the coal.

[0006] To achieve the above-mentioned purpose and other related purposes, the present invention provides a coal screening device, including: a shell, a screening plate, an adjustment plate, an adjustment assembly and a first driving mechanism; the screening plate and the adjustment plate are tiltedly arranged in the shell, and the lower end of the screening plate is rotatably connected to the shell; the higher end is connected to the first driving mechanism; the higher end of the adjustment plate is connected to the adjustment assembly, and the adjustment plate is slidably arranged on the screening plate; the adjustment assembly is arranged on the outside of the shell, and is used to drive the adjustment plate to slide along the screening plate to adjust the size of the first screening hole of the screening plate; a discharge port for coal blocks to pass through is arranged on the side where the shell is connected to the lower end of the screening plate; the first driving mechanism is at least partially arranged outside the shell, and is used to drive the screening plate to rotate relative to the shell.

[0007] Optionally, the adjustment plate includes a plurality of second screening holes and a blocking portion; the adjustment component is used to drive the adjustment plate to move, thereby adjusting the area of ​​the first screening hole blocked by the blocking portion of the adjustment member to adjust the size of the first screening hole.

[0008] Optionally, the adjustment assembly includes an adjusting bolt, a first adapter and a threaded hole; the threaded hole is arranged on the side of the higher end of the screening plate, and the first adapter is arranged on the adjustment plate; one end of the adjusting screw is threadedly connected to the threaded hole, and the other end extends out of the shell; the first adapter is connected to the adjusting screw through a bearing; by adjusting the length of the adjusting screw penetrating into the threaded hole, the adjusting plate is driven to slide along the screening plate through the first adapter.

[0009] Optionally, a limiting slide groove for limiting the position of the adjustment plate is provided on the screening plate.

[0010] Optionally, a closing piece is provided at one end of the limiting slide away from the adapter, and the closing piece is used to close the limiting slide to limit the maximum distance that the adjustment plate slides toward the lower end of the screening plate.

[0011] Optionally, the first driving mechanism includes a first driving motor, a first synchronous pulley, a second synchronous pulley, a first rotating shaft, a first synchronous belt and a cam; the first driving motor is arranged on the outer side of the shell, and the first synchronous pulley is connected to the first driving motor; the first rotating shaft is arranged on the shell, one end of which extends into the shell and is connected to the cam, and the other end is arranged outside the shell and is connected to the second synchronous pulley; the cam is connected to the screening plate; the first synchronous belt is sleeved on the first synchronous pulley and the second synchronous pulley.

[0012] Optionally, two second adapters arranged opposite to each other are arranged at the lower end of the screening plate, and a second rotating shaft is arranged on the bottom surface of the discharge port of the shell; the screening plate is connected to the shell via the second rotating shaft.

[0013] On the other hand, the present invention also provides a coal mill, comprising the above-mentioned coal screening device, and also comprising two relatively arranged crushing rollers, a second driving mechanism and a push plate loading mechanism; the shell includes a crushing chamber, a screening chamber and a coal storage chamber; the crushing chamber is arranged above the screening chamber, and the coal storage chamber is arranged below the screening chamber; the crushing roller is arranged in the crushing chamber, and the second driving mechanism is arranged outside the shell, which is used to drive one of the crushing rollers to rotate, and the first driving mechanism is used to drive the screening plate and the other crushing roller to rotate; the push plate loading mechanism is used to transfer the coal blocks screened by the coal screening device to the crushing chamber, so that the crushing roller can crush them.

[0014] Optionally, the second driving mechanism includes a second driving motor, a third synchronous pulley, a fourth synchronous pulley and a second synchronous belt; the second driving motor is arranged on the outer side of the shell; the third synchronous pulley is connected to the second driving motor; the fourth synchronous belt is connected to one of the crushing rollers; the second synchronous belt is sleeved on the third synchronous pulley and the fourth synchronous pulley; the first driving mechanism also includes a fifth synchronous pulley, a sixth synchronous pulley and a third synchronous belt; the fifth synchronous pulley is connected to the first driving motor; the sixth synchronous pulley is connected to another crushing roller; the third synchronous belt is sleeved on the fifth synchronous pulley and the sixth synchronous pulley.

[0015] Optionally, the push plate loading mechanism includes a coal block feed port, a coal block discharge port, and a pushing assembly; the coal block discharge port is connected to the discharge port of the shell, and the coal block discharge port is connected to the crushing chamber; the pushing assembly is used to drive the coal block to transfer to the crushing chamber.

[0016] As described above, a coal screening device and a coal mill of the present invention have at least the following beneficial effects: by arranging a coal screening device in the coal mill, the coal crushed in the crushing chamber is screened to ensure that the coal particles entering the coal storage chamber are of the expected size, thereby ensuring that the coal can be fully burned; in addition, a first driving mechanism is provided to drive the screening plate to rotate with the lower end as the center, thereby driving the coal blocks to converge to the discharge port, and then transmitted to the outside of the shell, and can also play a role in disturbing the coal blocks to prevent the coal blocks from being blocked in the first screening hole; in addition, an adjustment component and an adjustment plate are provided to adjust the size of the first screening port of the screening plate, thereby enabling the coal mill to adapt to different application scenarios and improve versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the coal mill of the present invention with the front side plate omitted.

[0018] Figure 2 Shown is a schematic structural diagram of the coal mill of the present invention.

[0019] Figure 3 Shown is an angled structural schematic diagram of the adjustment plate, adjustment assembly and screening plate of the present invention.

[0020] Figure 4 Shown is a schematic structural diagram of the adjustment plate, adjustment assembly and screening plate of the present invention from another angle. DETAILED DESCRIPTION

[0021] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0022] Please refer to all the following drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0023] The following embodiments are only for illustration purposes and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0024] See also Figure 1-4 The present invention provides a coal screening device, comprising: a shell 1, a screening plate 2, an adjusting plate 3, an adjusting assembly 4 and a first driving mechanism 5; the screening plate 2 and the adjusting plate 3 are tiltedly arranged in the shell 1, and the lower end of the screening plate 2 is rotatably connected to the shell 1; the upper end is connected to the first driving mechanism 5; the upper end of the adjusting plate 3 is connected to the adjusting assembly 4, and the adjusting plate 3 is slidably arranged on the screening plate 2; the adjusting assembly 4 is arranged on the outside of the shell 1, and is used to drive the adjusting plate 3 to slide along the screening plate 2 to adjust the size of the first screening hole of the screening plate 2; a discharge port for coal blocks to pass through is arranged on the side surface where the shell 1 is connected to the lower end of the screening plate 2; the first driving mechanism 5 is at least partially arranged outside the shell 1, and is used to drive the screening plate 2 to rotate relative to the shell 1. Specifically, the housing 1 includes a crushing chamber 11, a screening chamber 12 and a coal storage chamber 13. The crushing chamber 11 is arranged above the screening chamber 12, and the coal storage chamber 13 is arranged below the screening chamber 12. The crushing chamber 11 is used to crush coal blocks, the screening chamber 12 is used to screen out the coal blocks that are not completely crushed by the crushing chamber 11, and the coal storage chamber 13 is used to store coal particles. The coal screening device provided in this embodiment is arranged in the screening chamber 12. A plurality of first screening holes for screening coal are arranged at intervals on the screening plate 2. When the size of the coal meets the expected value, that is, it can pass through the first screening hole, it enters the coal storage chamber 13 for storage. When it is larger than the diameter of the first screening hole, it will be screened out by the screening plate 2 and then transferred to the outside of the housing 1 through the discharge port.

[0025] The adjustment plate 3 is slidably arranged above the screening plate 2, and the adjustment component 4 is used to drive the adjustment plate 3 to move, so as to adjust the size of the first screening hole, and then screen out coal of different sizes according to different situations. Specifically, when adjusting the first screening hole, the adjustment plate 3 can be used to block part of the first screening hole, so as to adjust its size. Of course, in other implementations, the size of the screening hole can also be adjusted by other methods, and this embodiment does not limit this.

[0026] The first driving mechanism 5 drives the screening plate 2 to move, thereby driving the screening plate 2 to rotate around the lower end, thereby driving the coal blocks to gather toward the discharge port, and then transmitted to the outside of the housing 1. In addition, by driving the screening plate 2 to move, the coal blocks can also be disturbed to prevent the coal blocks from being blocked in the first screening hole.

[0027] See also Figure 3-4 , the adjustment plate 3 includes a plurality of second screening holes 31 and a blocking portion 32; the adjustment component 4 is used to drive the adjustment plate 3 to move, and then adjust the area of ​​the blocking portion 32 of the adjustment member that blocks the first screening hole, so as to adjust the size of the first screening hole. Specifically, the number of the second screening holes 31 is the same as the number of the first screening holes, and they are arranged one by one. In addition, the diameters of the first screening holes and the second screening holes 31 can be set to be the same. When the first screening hole and the second screening hole 31 are arranged coaxially, the size of the coal block that can enter the coal storage chamber 13 is maximized. When the blocking portion 32 blocks the first screening hole, that is, the first screening hole and the second screening hole 31 are arranged misaligned, the first screening hole is blocked by the blocking portion 32, so the size of the coal block that can enter the coal storage chamber 13 is reduced. In this embodiment, the blocking portion 32 is a connecting structure connecting the plurality of second screening holes 31. Of course, it can also be other structures, which are not limited in this embodiment.

[0028] The adjustment assembly 4 includes an adjustment bolt 41, a first adapter 42 and a threaded hole; the threaded hole is arranged on the side surface of the higher end of the screening plate 2, and the first adapter 42 is arranged on the adjustment plate 3; one end of the adjustment screw is threadedly connected to the threaded hole, and the other end extends out of the housing 1; the first adapter 42 is connected to the adjustment screw through a bearing; by adjusting the length of the adjustment screw penetrating into the threaded hole, the adjustment plate 3 is driven to slide along the screening plate 2 through the first adapter 42. Specifically, a through hole is arranged on the first adapter 42, and a bearing is arranged in the through hole, and the adjustment bolt 41 passes through the bearing and is connected to the threaded hole of the screening plate 2. When the adjustment bolt 41 is rotated, due to the effect of the bearing, the position of the adjustment plate 3 relative to the adjustment bolt 41 will not change.

[0029] The screening plate 2 is provided with a limiting chute 22 for limiting the position of the adjusting plate 3. Specifically, the limiting chute is a chute provided on the side of the screening plate 2 away from the coal storage chamber 13, and the adjusting plate 3 is provided in the chute to limit the chute to slide only along the chute. Two chute can be provided, which are respectively provided on the opposite side of the screening plate 2, that is, relative to the Figure 3 The function of limiting the front and rear directions.

[0030] A closing piece 23 is provided at one end of the limiting chute 22 away from the adapter, and the closing piece 23 is used to close the limiting chute 22 to limit the maximum distance that the adjustment plate 3 slides toward the lower end of the screening plate 2. Specifically, the closing piece 23 is a plate-shaped structure, which is used to block the limiting chute 22 to prevent the adjustment plate 3 from sliding out of the limiting chute 22.

[0031] The first driving mechanism 5 includes a first driving motor 51, a first synchronous pulley 52, a second synchronous pulley 53, a first rotating shaft 54, a first synchronous belt 54 and a cam 55; the first driving motor 51 is arranged on the outer side of the housing 1, and the first synchronous pulley 52 is connected to the first driving motor 51; the first rotating shaft 54 ​​is arranged on the housing 1, one end of which extends into the housing 1 and is connected to the cam 55, and the other end is arranged outside the housing 1 and is connected to the second synchronous pulley 53; the cam 55 is connected to the screening plate 2; the first synchronous belt 54 is sleeved on the first synchronous pulley 52 and the second synchronous pulley 53. Specifically, the first driving motor 51 is arranged on the front side of the housing 1, the first synchronous pulley 52 and the transmission shaft of the first driving motor 51 are coaxially arranged, the first rotating shaft 54 ​​is arranged on the left side of the housing 1, one end of which extends into the housing 1 and is connected to the cam 55, and the other end is arranged outside the housing 1 for connecting with the second synchronous pulley 53. The first driving motor 51 drives the cam 55 to rotate through the belt transmission structure, and then drives the screening plate 2 to rotate around the lower end, thereby disturbing the coal, preventing the coal blocks from blocking the first screening holes and accelerating the transmission of the coal blocks through the discharge port to the outside of the shell 1.

[0032] The lower end of the screening plate 2 is provided with two second adapters 24 arranged opposite to each other, and the bottom surface of the discharge port of the housing 1 is provided with a second rotating shaft 14; the screening plate 2 is connected to the housing 1 via the second rotating shaft 14. Specifically, both ends of the second rotating shaft 14 are respectively connected to the housing 1, and the two second adapters 24 are respectively rotatably connected to the second rotating shaft 14, so that the screening plate 2 can rotate around the second rotating shaft 14.

[0033] On the other hand, the present invention also provides a coal mill, including the above-mentioned coal screening device, and also including two relatively arranged crushing rollers 6, a second driving mechanism 7 and a push plate loading mechanism 8; the shell 1 includes a crushing chamber 11, a screening chamber 12 and a coal storage chamber 13; the crushing chamber 11 is arranged above the screening chamber 12, and the coal storage chamber 13 is arranged below the screening chamber 12; the crushing roller 6 is arranged in the crushing chamber 11, the second driving mechanism 7 is arranged outside the shell 1, and is used to drive one of the crushing rollers 6 to rotate, and the first driving mechanism 5 is used to drive the screening plate 2 and the other crushing roller 6 to rotate; the push plate loading mechanism 8 is used to transfer the coal blocks screened by the coal screening device to the crushing chamber 11, so that the crushing roller 6 can crush them.

[0034] The second driving mechanism 7 includes a second driving motor 71, a third synchronous pulley 72, a fourth synchronous pulley 73, and a second synchronous belt 74; the second driving motor 71 is arranged on the outer side of the housing 1; the third synchronous pulley 72 is connected to the second driving motor 71; the fourth synchronous belt is connected to one of the crushing rollers 6; the second synchronous belt 74 is sleeved on the third synchronous pulley 72 and the fourth synchronous pulley 73; the first driving mechanism 5 also includes a fifth synchronous pulley, a sixth synchronous pulley 56, and a third synchronous belt 57; the fifth synchronous pulley is connected to the first driving motor 51; the sixth synchronous pulley 56 is connected to another crushing roller 6; the third synchronous belt 57 is sleeved on the fifth synchronous pulley and the sixth synchronous pulley 56. Specifically, the second driving motor 71 is arranged on the rear side of the housing 1, and the transmission shafts of the third synchronous pulley 72 and the second driving motor 71 are coaxially arranged. The rotating shafts of the fifth synchronous pulley, the first synchronous pulley 52 and the first drive motor 51 are coaxially arranged, that is, the first drive motor 51 can simultaneously drive one of the rotating rollers to move and the screening plate 2 to move, thereby reducing the use of driving elements and reducing manufacturing costs. At the same time, it can also rotate synchronously with the crushing roller 6 to prevent coal from accumulating in the screening chamber 12.

[0035] The push plate feeding mechanism 8 includes a coal block feed port 81, a coal block discharge port 82, and a push assembly 83; the coal block discharge port 82 is connected to the discharge port of the housing 1, and the coal block discharge port 82 is connected to the crushing chamber 11; the push assembly 83 is used to drive the coal blocks to be transferred into the crushing chamber 11. The push assembly 83 may include a third driving mechanism, two fixed plates and two movable plates; the two fixed plates and the two movable plates are arranged at intervals, and the third driving mechanism is used to simultaneously drive the two movable plates to move upward, thereby driving the coal blocks to enter the crushing chamber 11. The specific structural design of the third driving mechanism and the push assembly 83 can be referred to the prior art, and this embodiment will not be repeated.

[0036] In summary, the present invention screens the coal crushed in the crushing chamber 11 by setting a coal screening device in the coal mill, ensuring that the coal particles entering the coal storage chamber 13 are of the expected size, ensuring that the coal can be fully burned; in addition, a first driving mechanism 5 is set to drive the screening plate 2 to rotate with the lower end as the center, thereby driving the coal blocks to converge to the discharge port, and then transmitted to the outside of the shell 1, which can also play a role in disturbing the coal blocks and prevent the coal blocks from being blocked in the first screening hole; in addition, an adjustment component 4 and an adjustment plate 3 are also provided to adjust the size of the first screening port of the screening plate 2, thereby enabling the coal mill to adapt to different application scenarios and improve versatility. Therefore, the present invention effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A coal screening device, characterized in that: include: A housing, a screening plate, an adjusting plate, an adjusting assembly and a first driving mechanism; The screening plate and the adjusting plate are tiltedly arranged in the housing, the lower end of the screening plate is rotatably connected to the housing; the higher end is connected to the first driving mechanism; the higher end of the adjusting plate is connected to the adjusting assembly, and the adjusting plate is slidably arranged on the screening plate; the adjusting assembly is arranged outside the housing, and is used to drive the adjusting plate to slide along the screening plate to adjust the size of the first screening hole of the screening plate; A discharge port for coal blocks to pass through is provided on the side of the housing connected to the lower end of the screening plate; The first driving mechanism is at least partially disposed outside the housing, and is used to drive the screening plate to rotate relative to the housing.

2. A coal screening device according to claim 1, characterized in that: The adjustment plate includes a plurality of second screening holes and a blocking portion; the adjustment component is used to drive the adjustment plate to move, thereby adjusting the area of ​​the first screening hole blocked by the blocking portion of the adjustment member to adjust the size of the first screening hole.

3. A coal screening device according to claim 2, characterized in that: The adjustment assembly includes an adjustment bolt, a first adapter and a threaded hole; The threaded hole is arranged on the side surface of the higher end of the screening plate, and the first adapter is arranged on the adjusting plate; one end of the adjusting screw is threadedly connected with the threaded hole, and the other end extends out of the housing; the first adapter is connected with the adjusting screw through a bearing; The length of the adjusting screw penetrating into the threaded hole is adjusted, and the adjusting plate is driven to slide along the screening plate through the first adapter.

4. A coal screening device according to claim 3, characterized in that: The screening plate is provided with a limiting sliding groove for limiting the position of the adjusting plate.

5. A coal screening device according to claim 4, characterized in that: A closing piece is provided at one end of the limiting slide groove away from the adapter, and the closing piece is used to close the limiting slide groove to limit the maximum distance that the adjustment plate slides toward the lower end of the screening plate.

6. A coal screening device according to claim 1, characterized in that: The first driving mechanism includes a first driving motor, a first synchronous pulley, a second synchronous pulley, a first rotating shaft, a first synchronous belt and a cam; The first drive motor is arranged on the outer side of the housing, and the first synchronous pulley is connected to the first drive motor; the first rotating shaft is arranged on the housing, one end of which extends into the housing and is connected to the cam, and the other end is arranged outside the housing and is connected to the second synchronous pulley; the cam is connected to the screening plate; The first synchronous belt is sleeved on the first synchronous belt pulley and the second synchronous belt pulley.

7. A coal screening device according to claim 1, characterized in that: The lower end of the screening plate is provided with two second adapters which are arranged opposite to each other, and the bottom surface of the discharge port of the shell is provided with a second rotating shaft; the screening plate is connected with the shell via the second rotating shaft.

8. A coal mill, characterized in that: A coal screening device comprising a coal screening device as claimed in any one of claims 1 to 7, further comprising two crushing rollers arranged opposite to each other, a second driving mechanism and a plate pushing mechanism; The housing includes a crushing chamber, a screening chamber and a coal storage chamber; the crushing chamber is arranged above the screening chamber, and the coal storage chamber is arranged below the screening chamber; The crushing roller is arranged in the crushing chamber, the second driving mechanism is arranged outside the housing and is used to drive one of the crushing rollers to rotate, and the first driving mechanism is used to drive the screening plate and the other crushing roller to rotate; The plate pushing loading mechanism is used to transfer the coal blocks screened by the coal screening device into the crushing chamber so that the crushing rollers can crush them.

9. A coal mill according to claim 8, characterized in that: The second driving mechanism comprises a second driving motor, a third synchronous pulley, a fourth synchronous pulley and a second synchronous belt; the second driving motor is arranged on the outer side of the housing; the third synchronous pulley is connected to the second driving motor; the fourth synchronous belt is connected to one of the crushing rollers; the second synchronous belt is sleeved on the third synchronous pulley and the fourth synchronous pulley; The first driving mechanism also includes a fifth synchronous pulley, a sixth synchronous pulley and a third synchronous belt; the fifth synchronous pulley is connected to the first driving motor; the sixth synchronous pulley is connected to another of the crushing rollers; and the third synchronous belt is sleeved on the fifth synchronous pulley and the sixth synchronous pulley.

10. A coal mill according to claim 8, characterized in that: The push plate feeding mechanism includes a coal block feed port, a coal block discharge port, and a pushing assembly; the coal block discharge port is connected to the discharge port of the shell, and the coal block discharge port is connected to the crushing chamber; the pushing assembly is used to drive the coal block to transfer to the crushing chamber.

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