A coal feeding crusher with high sealing performance

Abstract

The present invention discloses a coal feeding crusher with high sealing performance, which includes a covering housing provided with a feeding port and a discharging port, a first roller rotatably installed inside the covering housing through a rotating shaft, and a plurality of first claw plates are arranged on the outer surface of the first roller. A second roller is rotatably installed inside the covering housing through a rotating shaft and is located on one side of the first roller. Second claw plates are arranged on the second roller, and each second claw plate is arranged between two adjacent first claw plates. Coal blocks fall between the first roller and the second roller through the feeding port on the covering housing for crushing. The present invention can adjust the gap between the first roller and the second roller, so that when crushing coal blocks, the length of the crushed coal blocks in the front-back direction can be changed, and the second roller can also be driven to move in the axial direction of the second roller, thereby changing the length of the crushed coal blocks in the left-right direction, so as to achieve the purpose of controlling the size of the crushed coal blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of crushers, and particularly to a coal feeding crusher with high sealing performance. Background Art

[0002] In the production process of the coal industry, coal crushers are often used to break large pieces of coal. A coal crusher generally includes a crusher rotor and a crusher housing. The crusher rotor is rotatably installed in the crusher housing through bearings, and crushing teeth are provided on the crusher rotor. Then, large pieces of coal are poured into the crusher housing from the feeding port. At this time, the rotating crusher rotor will drive the crushing teeth to crush the coal.

[0003] Currently, the commonly used crusher breaks the coal blocks located between the rollers by arranging two rollers close to each other and making the crushing teeth on the two rollers cross each other.

[0004] However, in actual use, since the distance between the two rollers (the gap for coal crushing) is constant, the size of the crushed coal blocks is fixed and cannot be changed. When finer or coal blocks of different sizes are required, this kind of equipment is difficult to operate. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal feeding crusher with high sealing performance to solve the technical problem of poor sealing performance of the crusher caused by dust splashing in the prior art.

[0006] To solve the above technical problem, the present invention specifically provides the following technical solutions:

[0007] A coal feeding crusher with high sealing performance, characterized by comprising:

[0008] A covering housing, provided with a feeding port and a discharging port;

[0009] A first roller, rotatably installed inside the covering housing through a rotating shaft, and a plurality of first claw plates are arranged on the outer surface of the first roller;

[0010] A second roller, rotatably installed inside the crushing cavity through a rotating shaft and located on one side of the first roller. Second claw plates are arranged on the second roller, and each second claw plate is arranged between two adjacent first claw plates. Coal blocks fall between the first roller and the second roller through the feeding port on the covering housing for crushing.

[0011] As a preferred solution of the present invention, an adjusting device is connected to the end of the rotating shaft of the second roller, and the adjusting device can drive the second roller to move inside the covering housing to change the gap size between the second roller and the first roller;

[0012] The adjusting device includes a driving device, a loading base, and an offset component. Wherein, the end of the second roller is arranged inside the offset component, the offset component is slidably installed inside the shell wall of the covering housing, and the offset component can slide towards the direction of the first roller;

[0013] The rotating shaft of the second roller passes through the offset component and is connected to the driving device arranged outside the covering housing, and the driving device is used to drive the second roller to rotate axially;

[0014] The driving device is arranged on the loading base, the loading base is slidably installed on the covering housing, and the loading base can slide towards the direction of the first roller and drive the second roller to slide through the driving device, so as to change the gap size between the second roller and the first roller.

[0015] As a preferred solution of the present invention, a sliding groove is opened inside the shell wall of the covering housing, and the extending direction of the sliding groove is from the first roller to the second roller;

[0016] The offset component includes a pedestal bearing sleeved on the rotating shaft of the second roller and a pressing cylinder arranged on the covering housing. Wherein, the pedestal bearing is slidably installed in the sliding groove, and the pedestal bearing can slide in the sliding groove towards the direction of the first roller driven by the driving device, and the pressing cylinder is used to press and fix the pedestal bearing after it moves.

[0017] As a preferred solution of the present invention, an installation base is arranged on the covering housing, the inside of the installation base is hollowed out, and both the pedestal bearing and the pressing cylinder are arranged inside the installation base;

[0018] Wherein, the pedestal bearing can also move along the axial direction of the first roller inside the installation base, the pressing cylinders are arranged on both sides of the pedestal bearing, and the pressing cylinders are arranged above the rotating shaft of the second roller. The pressing cylinders fix the position of the upper half of the pedestal bearing after it moves by clamping it.

[0019] As a preferred solution of the present invention, the loading base is slidably installed at the bottom of the covering housing, a first threaded plate and a first screw rod are respectively arranged on both sides of the loading base, both the first threaded plate and the first screw rod are installed on the covering housing, the first screw rod extends towards the direction of the first roller, and the first screw rod drives the loading base to move in the direction of approaching and departing from the first roller by rotating inside the first threaded plate;

[0020] The driving device is slidably mounted on the loading base. The driving device can move in a direction close to and away from the offset component. Second threaded plates and second screw rods are respectively arranged on both sides of the driving device. The second threaded plates and the second screw rods are not on the same side as the first threaded rod and the first screw rod. The second screw rod drives the loading base to move in a direction close to and away from the offset component by rotating within the second threaded plate.

[0021] As a preferred embodiment of the present invention, an auxiliary crushing component is provided on the second roller. The auxiliary crushing component includes a moving shaft, a locking buckle, and a secondary claw disc. The moving shaft is slidably mounted inside the second roller. The moving shaft can slide along the axial direction of the second roller. One end of the sliding shaft is provided with a moving handle. The moving handle passes through the second roller and is placed outside. A first moving groove is provided between the offset component and the driving device on the rotation of the second roller. The moving handle is arranged in the first moving groove, and a locking buckle for fixing the position of the moving handle is arranged in the first moving groove.

[0022] A secondary claw disc is arranged on the moving shaft. The secondary claw disc protrudes from the surface of the second roller and fits with the second claw disc. A second moving groove is provided between two adjacent second claw discs. The secondary claw disc is arranged in the second moving groove. The secondary claw disc is separated from the second claw disc by the driving of the moving shaft.

[0023] As a preferred embodiment of the present invention, the secondary claw disc and the second claw disc are fitted by magnetic attraction.

[0024] As a preferred embodiment of the present invention, a sealing component is provided on the moving groove. The sealing component includes sliding grooves opened on both side walls of the second moving groove and folding plastic parts arranged in the sliding grooves. The folding plastic parts have elasticity by themselves. One end of the folding plastic parts is fixedly connected to the surface of the secondary claw disc, and the other end is arranged on the side surface of the end of the second moving groove. The folding plastic parts are arranged on both sides of the secondary claw disc.

[0025] As a preferred embodiment of the present invention, felt cloth is wrapped around both side edges of the folding plastic parts. The folding plastic parts are slidably connected to the sliding grooves through the felt cloth.

[0026] As a preferred embodiment of the present invention, the upper surface of the folding plastic parts is flush with the outer surface of the second roller.

[0027] The present invention has the following beneficial effects compared with the prior art:

[0028] The present invention can adjust the gap between the first roller and the second roller by setting an adjustment device, so that when crushing coal blocks, the length of the coal blocks after crushing in the front-to-back direction can be changed, and the second roller can be driven to move in the axial direction thereof, thereby changing the length of the coal blocks after crushing in the left-to-right direction, thereby achieving the purpose of controlling the size of the coal blocks after crushing. In addition, the device is also provided with an auxiliary crushing component, which can also make the coal blocks more uniformly crushed and the size more consistent, so that the practical effect of the device is better and the practicality is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a structural schematic diagram of the installation base in the present invention;

[0032] Figure 3 For the present invention Figure 2 The enlarged view of point A in the middle;

[0033] Figure 4 It is a side view of the enclosure shell of the present invention, specifically a schematic diagram of the structure of the offset assembly;

[0034] Figure 5 It is a schematic diagram of the cross-section structure of the second roller in the present invention;

[0035] Figure 6 It is a schematic structural diagram of the sealing assembly of the present invention.

[0036] The numbers in the figure represent the following:

[0037] 1. Envelope shell; 2. First roller; 3. First claw plate; 4. Second roller; 5. Second claw plate; 6. Driving device; 7. Loading base; 8. Offset assembly; 9. Sliding groove; 10. Clamping cylinder; 11. Seat bearing; 12. First threaded plate; 13. First screw rod; 14. Rotating shaft; 15. Second threaded plate; 16. Second screw rod; 17. Moving shaft; 18. Second claw plate; 19. Moving handle; 20. First moving groove; 21. Second moving groove; 22. Sliding groove; 23. Folding plastic part; 24. Mounting base. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] As Figures 1 to 4 shown, the present invention provides a coal feeding crusher with high sealing performance, including

[0040] a covering housing 1, which is provided with a feed inlet and a discharge outlet,

[0041] a first roller 2, which is rotatably installed inside the covering housing 1 through a rotating shaft 14. A plurality of first claw plates 3 are arranged on the outer surface of the first roller 2,

[0042] a second roller 4, which is rotatably installed inside the covering housing 1 through the rotating shaft 14 and is located on one side of the first roller 2. Second claw plates 5 are arranged on the second roller 4, and each second claw plate 5 is arranged between two adjacent first claw plates 3. Coal blocks fall between the first roller 2 and the second roller 4 through the feed inlet on the covering housing 1 for crushing.

[0043] Currently, for the crushing of coal blocks, a crusher is usually used to complete the task. Two rolling drums with crushing teeth are used and they are in contact with each other, and there is a gap between them. Then, the coal blocks are introduced from the feed inlet so that they can just fall into the gap between the two drums. When the coal blocks fall into the gap, they will be broken by the rotating crushing teeth and finally discharged from the discharge outlet, thus completing the crushing work of the coal blocks.

[0044] However, the current coal block crushers have the problem that it is difficult to control the size of the crushed coal blocks. When the two drums are fixedly installed, the gap between them is a fixed value. Therefore, the size of the coal slag falling through this gap will be fixed, that is to say, during one-time crushing, the size of the crushed coal blocks is approximate, and the size of each individual coal block is determined by the distance between two adjacent crushing teeth and the distance between the two drums.

[0045] Therefore, in this device, by changing the distance between two adjacent crushing teeth and the distance between the two drums, the purpose of changing the size of the crushed coal blocks is achieved.

[0046] As Figure 1 shown, an adjusting device is connected to the end of the rotating shaft 14 of the second roller 4. The adjusting device can drive the second roller 4 to move inside the covering housing 1 to change the size of the gap between the second roller 4 and the first roller 2.

[0047] The adjusting device includes a driving device 6, a loading base 7 and an offset component 8. Among them, the end of the second roller 4 is arranged inside the offset component 8. The offset component 8 is slidably installed inside the shell wall of the covering shell 1, and the offset component 8 can slide in the direction of the first roller 2.

[0048] The rotating shaft 14 of the second roller 4 passes through the offset component 8 and is connected to the driving device 6 arranged outside the covering shell 1. The driving device 6 is used to drive the second roller 4 to rotate axially.

[0049] The driving device 6 is arranged on the loading base 7. The loading base 7 is slidably installed on the covering shell 1. The loading base 7 can slide in the direction of the first roller 2 and drive the second roller 4 to slide through the driving device 6, so as to change the gap size between the second roller 4 and the first roller 2.

[0050] In this device, the driving device 6 is used to connect with the rotating shaft 14 of the second roller 4 to drive the second roller 4 to rotate, so as to crush the coal blocks. The first roller 2 also rotates by connecting with an external device. In this device, the size of the crushed coal blocks is changed by changing the distance between the second roller 4 and the first roller 2. Specifically, by connecting the rotating shaft 14 of the second roller 4 with the offset component 8 to make the offset component 8 slide, and on the other hand, making the adjusting device move, so as to achieve the purpose of moving the position of the second roller 4 and changing the distance between the first roller 2 and the second roller 4.

[0051] Therefore, this device can also keep the second roller 4 fixed, connect the rotating shaft 14 of the first roller 2 with the offset component 8 and with the driving device 6, and then move the first roller 2, which can also achieve the purpose of changing the distance between the two. In addition, it can also make both the first roller 2 and the second roller 4 move, which can also achieve the purpose of changing the distance and changing the size of the crushed coal blocks.

[0052] Among them, the driving device 6 can be driven by a rotating motor or driven by a pulley. The driving device 6 is installed on the loading base 7, and the position of the driving device 6 on the loading base 7 is adjusted through the cooperation of a threaded rod and a threaded plate.

[0053] For the installation of the offset component 8, a sliding groove 9 can be opened inside the shell wall of the covering shell 1. The extending direction of the sliding groove 9 is from the first roller 2 to the second roller 4.

[0054] The offset component 8 includes a pedestal bearing 11 sleeved on the rotating shaft 14 of the second roller 4 and a pressing cylinder 10 arranged on the covering shell 1. Among them, the pedestal bearing 11 is slidably installed in the sliding groove 9, and the pedestal bearing 11 can slide in the sliding groove 9 in the direction of the first roller 2 under the drive of the driving device 6. The pressing cylinder 10 is used to press and fix the pedestal bearing 11 after it moves.

[0055] In actual setting, the shell wall of the covering shell 1 on the side close to the driving device 6 can be set to be relatively thick, so that the sliding groove 9 opened on the shell wall has a certain width, so that the offset component 8 can be placed into the shell wall. The sliding groove 9 can be set as a rectangle extending in the direction of the first roller 2, so that the offset component 8 moves in the sliding groove 9 in the direction of the first roller 2.

[0056] Among them, the pedestal bearing 11 is an existing component, that is, the bearing is covered with a pedestal outside. In this device, the bearing part on the pedestal bearing 11 is loaded with the rotating shaft 14 of the second roller 4. That is, the rotating shaft 14 of the second roller 4 is installed in the bearing part of the pedestal bearing 11, so that the rotating shaft 14 can rotate axially, driving the second roller 4 to rotate axially. And the base part of the pedestal bearing 11 is for being able to move in the sliding groove 9. Through the sliding connection between the pedestal and the sliding groove 9, the pedestal bearing 11 and the rotating shaft 14 installed on the pedestal bearing 11 are driven to move by an external drive, so as to achieve the purpose of changing the gap between the second roller 4 and the first roller 2.

[0057] There are various choices for the way of sliding connection between the pedestal of the pedestal bearing 11 and the sliding groove 9. The connection of the slide rail and the slider can be used. Among them, both the upper and lower ends of the pedestal bearing 11 are slidably connected to the upper and lower surfaces of the sliding groove 9. In this way, the sliding effect is better and more stable.

[0058] As Figure 4 shown, further, an installation base 24 can be provided on the covering shell 1. The inside of the installation base 24 is hollowed out, and the pedestal bearing 11 and the pressing cylinder 10 are both arranged inside the installation base 24.

[0059] Since the moving space required by the offset component 8 only exists at the position where the rotating shaft 14 of the second roller 4 is connected to one side shell wall of the covering shell 1, if the entire shell surface is thickened, it will be a bit of a waste of cost. Therefore, an installation base 24 can be set at the position where the rotating shaft of the second roller 4 is connected to one side shell wall of the covering shell 1 for local thickening treatment, so as to save costs.

[0060] In this device, by setting the installation base 24, the moving distance of the offset component 8 inside it along the axis direction of the second roller 4 is wider. Therefore, this device can also move the second roller 4 along its axis direction by moving the offset component 8 (moving on the axis of the second roller 4), so as to change the distance between the crushing teeth on the first roller 2 and the second roller 4, and thus change the length of the crushed coal blocks in another direction (different from the direction of the gap between the first roller 2 and the second roller 4).

[0061] The specific moving method is to drive the rotating shaft 14 to move axially through the driving device 6, and release the pressing of the pressing cylinder 10 on the pedestal bearing 11, so that the offset assembly 8 moves together, and finally the second roller 4 is moved along its axis.

[0062] Among them, the pedestal bearing 11 can also move along the axis direction of the first roller 2 in the installation base 24. The pressing cylinders 10 are arranged on both sides of the pedestal bearing 11, and the pressing cylinders 10 are arranged above the rotating shaft 14 of the second roller 4. The pressing cylinders 10 fix the position of the pedestal bearing 11 after moving by clamping the upper half of the pedestal bearing 11.

[0063] Specifically, as Figure 4 shown, the pressing cylinders 10 can be arranged inside the installation base 24. The main function of the pressing cylinders 10 is to limit and fix the pedestal bearing 11. Therefore, in this device, other components that can limit the position of the pedestal bearing 11 after moving and can be freely unlocked can also be used.

[0064] The pressing cylinders 10 in this device can be arranged on both sides inside the installation base 24, that is, the pressing cylinders 10 are used to clamp the front of the pedestal bearing 11. Since the rotating shaft 14 of the second roller 4 passes through the front of the pedestal bearing 11, the pressing cylinders 10 cannot directly clamp the entire front of it. And the pedestal bearing 11 needs to move in the installation base 24, so here it is preferred that the pressing cylinders 10 clamp the upper half of the pedestal bearing 11. The working ends of the pressing cylinders 10 are arranged in a long strip shape above the installation base 24, and the long strip-shaped working ends cover the entire length area of the installation base 24. In this way, when the pedestal bearing 11 moves inside the installation base 24, the pressing cylinders 10 will not interfere with it. And it can also be clamped at various positions of the installation base 24.

[0065] Specifically, the pedestal bearing 11 moves in the length direction of the installation base 24 (towards the first roller 2) and along its own axis direction. When the pedestal bearing 11 moves in the length direction of the installation base 24, since the long strip-shaped working ends of the pressing cylinders 10 are arranged in the entire length direction of the installation base 24, no matter where the pedestal bearing 11 moves in this direction, there are parts of the pressing cylinders 10 that can clamp its two sides;

[0066] When the pedestal bearing 11 moves along its own axis direction, it is exactly the telescopic direction of the working ends of the pressing cylinders 10. Therefore, at this time, the pressing cylinders 10 on both sides only need to extend different lengths to clamp it. There will be no interference or inability to clamp.

[0067] When specifically setting, the seat body of the pedestal bearing 11 and the outer ring of the bearing can be set to protrude slightly outwards to prevent the pressing cylinder 11 from clamping the seat body and the outer ring during clamping, rather than clamping the inner ring and causing it to be unable to rotate.

[0068] In addition, the two surfaces of the mounting base 24 are set to be closed, which are not shown in the figure.

[0069] And since the rotating shaft 14 of the second roller 4 needs to move within the mounting base 24, the component that encloses the mounting base 24 needs to use an elastic component. This component can be set on the shell wall of the covering shell 1 to enclose the end opening of the mounting base 24.

[0070] Such as Figure 1 As shown, the loading base 7 is slidably mounted at the bottom of the covering shell 1. The side parts of the loading base 7 are respectively provided with a first threaded plate 12 and a first screw rod 13. Both the first threaded plate 12 and the first screw rod 13 are mounted on the covering shell 1. The first screw rod 13 extends towards the direction of the first roller 2. The first screw rod 13 drives the loading base 7 to move in the direction of approaching and departing from the first roller 2 by rotating within the first threaded plate 12.

[0071] The driving device 6 is slidably mounted on the loading base 7. The driving device 6 can move in the direction of approaching and departing from the offset component 8. On both sides of the driving device 6, a second threaded plate 15 and a second screw rod 16 are respectively provided. The second threaded plate 15 and the second screw rod 16 are not on the same side as the first threaded rod and the first screw rod 13. The second screw rod 16 drives the loading base 7 to move in the direction of approaching and departing from the offset component 8 by rotating within the second threaded plate 15.

[0072] In this device, by the rotation of the first screw rod 13 within the first threaded plate 12, the driving device 6 is pushed to move in the direction of the first roller 2, thereby changing the distance between the first roller 2 and the second roller 4.

[0073] By the rotation of the second screw rod 16 within the second threaded plate 15, the driving device 6 approaches and departs from the covering shell 1, so that it moves at the position of the axis of the second roller 4, thereby changing the distance between the first claw disc 3 and the second claw disc 5, so as to change the size of the cinder from another direction.

[0074] Such as Figure 5 And Figure 6As shown in the figure, an auxiliary crushing assembly is provided on the second roller 4. The auxiliary crushing assembly includes a moving shaft 17, a locking buckle, and a secondary claw disc 18. The moving shaft 17 is slidably installed inside the second roller 4. The moving shaft 17 can slide along the axial direction of the second roller 4. One end of the moving shaft 17 is provided with a moving handle 19. The moving handle 19 passes through the second roller 4 and is placed outside. A first moving groove 20 is provided between the offset assembly 8 and the driving device 6 during the rotation of the second roller 4. The moving handle 19 is arranged in the first moving groove 20, and a locking buckle for fixing the position of the moving handle 19 is arranged in the first moving groove 20.

[0075] A secondary claw disc 18 is arranged on the moving shaft 17. The secondary claw disc 18 protrudes from the surface of the second roller 4 and fits with the second claw disc 5. A second moving groove 21 is provided between two adjacent second claw discs 5. The secondary claw disc 18 is arranged in the second moving groove 21. The secondary claw disc 18 is separated from the second claw disc 5 by the drive of the moving shaft 17.

[0076] In this device, the secondary claw disc 18 is connected to the moving shaft 17. By moving the moving shaft 17 inside the rotating shaft 14 of the second roller 4, the secondary claw disc 18 that fits with the second claw disc 5 is pulled open, forming a certain distance between the secondary claw disc 18. The effects that can be achieved are as follows:

[0077] Originally, there was only one second claw disc 5 between two adjacent first claw discs 3. After the secondary claw disc 18 is set, there will be a second claw disc 5 and a secondary claw disc 18 between every two adjacent first claw discs 3. When the secondary claw disc 18 is pulled open, the distance between two adjacent first claw discs 3 is divided into three parts by two claw discs (the second claw disc 5 and the secondary claw disc 18). In this way, the coal blocks falling into it will be cut into three pieces instead of two pieces, so as to achieve the purpose of adjusting the size of the coal blocks.

[0078] Furthermore, through the adjustment of the second screw 16 and the second threaded plate 15, the three spacings can be adjusted to be of the same length, so that the crushed coal blocks are more standardized.

[0079] The secondary claw disc 18 and the second claw disc 5 are attached to each other by magnetic attraction.

[0080] A sealing assembly is provided on the second moving groove 21. The sealing assembly includes sliding grooves 22 opened on both side walls of the second moving groove 21 and folding plastic parts 23 arranged in the sliding grooves 22. The folding plastic parts 23 have elasticity by themselves. One end of the folding plastic parts 23 is fixedly connected to the surface of the secondary claw disc 18, and the other end is arranged on the side surface of the end of the second moving groove 21. Folding plastic parts 23 are arranged on both sides of the secondary claw disc 18.

[0081] Felt cloth is wrapped around both side edges of the folding plastic parts 23. The folding plastic parts 23 are slidably connected to the sliding grooves 22 through the felt cloth.

[0082] The upper surface of the folding plastic part 23 is flush with the outer surface of the second roller 4.

[0083] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A coal feeding crusher with high sealing performance, characterized in that, Including, A covering housing is provided with a feed inlet and a discharge outlet; A first roller is rotatably installed inside the covering housing through a rotating shaft, and a plurality of first claw discs are arranged on the outer surface of the first roller; A second roller is rotatably installed inside the covering housing through a rotating shaft and is located on one side of the first roller. A second claw disc is arranged on the second roller, and each second claw disc is arranged between two adjacent first claw discs. Coal blocks fall between the first roller and the second roller through the feed inlet on the covering housing for crushing; The end of the rotating shaft of the second roller is connected with an adjusting device, and the adjusting device can drive the second roller to move inside the covering housing to change the gap size between the second roller and the first roller; The adjusting device includes a driving device, a loading base and an offset component. Among them, the end of the second roller is arranged inside the offset component, the offset component is slidably installed inside the wall of the covering housing, and the offset component can slide towards the direction of the first roller; An auxiliary crushing component is arranged on the second roller. The auxiliary crushing component includes a moving shaft, a locking buckle and a secondary claw disc. The moving shaft is slidably installed inside the second roller, and the moving shaft can slide along the axial direction of the second roller. One end of the moving shaft is provided with a moving handle, and the moving handle passes through the second roller and is placed outside. A first moving groove is arranged between the offset component and the driving device on the rotation of the second roller. The moving handle is arranged in the first moving groove, and a locking buckle for fixing the position of the moving handle is arranged in the first moving groove; A secondary claw disc is arranged on the moving shaft. The secondary claw disc protrudes from the surface of the second roller and fits with the second claw disc. A second moving groove is arranged between two adjacent second claw discs. The secondary claw disc is arranged in the second moving groove, and the secondary claw disc is separated from the second claw disc by the driving of the moving shaft.

2. The high-sealing coal feeding crusher according to claim 1, characterized in that The rotating shaft of the second roller passes through the offset component and is connected with the driving device arranged outside the covering housing. The driving device is used to drive the second roller to rotate axially; The driving device is arranged on the loading base. The loading base is slidably installed on the covering housing. The loading base can slide towards the direction of the first roller and drive the second roller to slide through the driving device to change the gap size between the second roller and the first roller.

3. The high-sealing coal feeding crusher according to claim 2, characterized in that, A sliding groove is opened inside the wall of the covering housing, and the extending direction of the sliding groove is from the first roller to the second roller; The offset component includes a pedestal bearing sleeved on the rotating shaft of the second roller and a pressing cylinder arranged on the covering housing. Wherein, the pedestal bearing is slidably installed in the sliding groove, and the pedestal bearing can slide in the sliding groove towards the first roller driven by the driving device, and the pressing cylinder is used to press and fix the pedestal bearing after it moves.

4. The high-sealing coal feeding crusher according to claim 3, characterized in that An installation base is arranged on the covering housing, the interior of the installation base is hollowed out, and both the pedestal bearing and the pressing cylinder are arranged in the installation base; Wherein, the pedestal bearing can also move along the axis direction of the first roller in the installation base, the pressing cylinders are arranged on both sides of the pedestal bearing, and the pressing cylinders are arranged above the rotating shaft of the second roller. The pressing cylinders fix the position of the pedestal bearing after movement by clamping the upper half of the pedestal bearing.

5. The high-sealing coal feeding crusher according to claim 2, characterized in that, The loading base is slidably installed at the bottom of the covering housing. First threaded plates and first screw rods are respectively arranged on the side parts of the loading base. Both the first threaded plates and the first screw rods are installed on the covering housing. The first screw rods extend towards the first roller, and the first screw rods drive the loading base to move in the direction close to and away from the first roller by rotating in the first threaded plates; The driving device is slidably installed on the loading base, and the driving device can move in the direction close to and away from the offset component. Second threaded plates and second screw rods are respectively arranged on both sides of the driving device. The second threaded plates and the second screw rods are not on the same side as the first threaded plates and the first screw rods. The second screw rods drive the loading base to move in the direction close to and away from the offset component by rotating in the second threaded plates.

6. The high-sealing coal feeding crusher according to claim 1, characterized in that, The secondary claw disc and the second claw disc are attached to each other by magnetic attraction.

7. The high-sealing coal feeding crusher according to claim 6, characterized in that, A sealing component is arranged on the second moving groove. The sealing component includes sliding grooves opened on both side walls of the second moving groove and folding plastic parts arranged in the sliding grooves. The folding plastic parts have elasticity by themselves, and one end of the folding plastic parts is fixedly connected to the surface of the secondary claw disc, and the other end is arranged on the side surface of the end of the second moving groove. The folding plastic parts are arranged on both sides of the secondary claw disc.

8. A coal feeding crusher with high sealing performance according to claim 7, characterized in that, Felt cloth is wrapped around the two side edges of the folding plastic part, and the folding plastic part is slidably connected to the sliding groove through the felt cloth.

9. The high-sealing coal feeding crusher according to claim 8, wherein, The upper surface of the folding plastic part is flush with the outer surface of the second roller.

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