Impact crushing device

Abstract

The utility model relates to an impact crushing device which comprises an impact crusher shell supported on the ground through a supporting column, and a pre-machining assembly capable of conveying ore materials subjected to preliminary machining to a shell cavity of the impact crusher shell is arranged at the axial upper end of the impact crusher shell. A screening assembly for screening crushed ore materials is further arranged at the axial lower end of the impact crusher shell; a mounting pipe shell of the pre-machining assembly is mounted on the top face of the impact crushing shell in the mode that the mounting pipe shell communicates with a shell cavity of the impact crushing shell, two crushing rollers are arranged in a pre-machining pipe body of the mounting pipe shell in parallel, and two feeding pipes are inserted into the axial upper end of the pre-machining pipe body in an aligned mode. And a dust falling assembly is arranged on the top surface, between the two feeding pipes, of the pre-machined pipe body. According to the utility model, ores can be prevented from splashing and flying out, so that the safety is improved, and meanwhile, the ores are preprocessed, so that the impact crushing efficiency and quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ore crushing equipment, in particular to a counterattack type crushing device. Background Art

[0002] A counterattack crusher is a crushing machine that uses impact energy to crush materials. It has the characteristics of simple structure, high reliability, wide application range, etc. Therefore, it is widely used in industries such as mines, chemical industries, construction, railways, etc. During actual use, materials are continuously input into the equipment, so that the materials can be broken by high-speed impact under the action of the plate hammers rotating at high speed with the rotating shaft, and are thrown at high speed in the tangential direction of the rotating plate hammers towards the counterattack plate at the other end of the crushing chamber and broken again, and then rebound from the counterattack plate to the plate hammers to repeat the above process. During the round trip of the materials, there is also an impact effect between the materials; due to the impact of the materials by the plate hammers, the impact with the counterattack plate, and the collision between the materials, cracks continuously occur in the materials, making them loose and resulting in pulverization. When the particle size of the materials is smaller than the gap between the counterattack plate and the plate hammers, they are discharged from the lower discharge port. Therefore, the counterattack crusher has the advantages of large production capacity, large crushing ratio, cubic particles of the crushed materials, and small particle size.

[0003] However, in order to ensure the efficiency and speed of material input, the existing counterattack crushers usually directly set the feed inlet above the plate hammers and do not set an interception structure. When the materials collide and impact with the plate hammers rotating at high speed, the materials are extremely easy to be driven by the plate hammers and fly out from the feed inlet, resulting in the sputtered materials threatening the safety of the staff around the equipment and reducing the safety during operation. In addition, during the material input and crushing process, due to the movement and generation of fine particles, a large amount of dust is generated. The dust is extremely easy to leak from the feed inlet and pollute the working environment, and the floating dust will also cause harm to the physical health of the staff. Finally, when the existing counterattack crusher faces ores that are too large and too heavy, the input of such ores is extremely easy to cause excessive impact on the input port and damage the equipment, and the ores that are too large are restricted by their own size and cannot be effectively impacted and driven by the plate hammers. There is not enough space between the plate hammers and the counterattack plate for them to reciprocate and collide and break, resulting in the ores that are too large unable to be effectively crushed and processed in the crushing chamber of the equipment, and also hindering the continuous input of subsequent ores. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a counter - impact crushing device. By setting a pretreatment structure above the counter - impact crushing structure, it can prevent ore from splashing out during counter - impact crushing, thereby enhancing safety. At the same time, it can also pre - process and crush the ore to improve the efficiency and quality of counter - impact crushing. In addition, the counter - impact crushing device provided in this application also reduces the leakage of dust by means of air extraction and dust removal and spray dust reduction, so as to avoid the dust floating outside the equipment from harming the physical health of workers and polluting the environment. It solves the defects of existing counter - impact crushing equipment, such as easy splashing out of materials, low safety, inability to effectively block dust, and easy pollution of the environment and harm to the physical health of workers caused by the dust generated during the material input process and crushing process. There are also problems that large - size ores cannot be effectively crushed, large - size ores are easy to impact and damage the equipment, and cannot be driven at high speed for reciprocating impact, and the crushing difficulty is high.

[0005] The technical solution adopted by the present utility model is as follows: A counter - impact crushing device includes a counter - impact crusher housing supported on the ground by support columns. At the upper axial end of the counter - impact crusher housing, there is a pre - processing component capable of conveying the ore materials that have completed preliminary processing into its housing cavity. And at the lower axial end of the counter - impact crusher housing, there is also a screening component for screening the crushed ore materials. The installation pipe housing of the pre - processing component is installed on the top surface of the counter - impact crushing housing in a manner that communicates with the housing cavity of the counter - impact crushing housing. And in the pre - processing pipe body of the installation pipe housing, two crushing rollers are arranged in parallel. At the upper axial end of the pre - processing pipe body, two feeding pipes are inserted in alignment. And on the top surface of the pre - processing pipe body between the two feeding pipes, there is a dust - reduction component.

[0006] According to a preferred embodiment, on the inner side wall of the pre - processing pipe body, there are guiding strip plates arranged in alignment to guide the ore materials conveyed by the feeding pipes to converge in the gap area between the two crushing rollers.

[0007] According to a preferred embodiment, on the outer side wall of the pre - processing pipe body, there is a high - torque rotating motor capable of driving the two crushing rollers to rotate in opposite directions, so as to drive the ore materials to fall from the gap between the two crushing rollers.

[0008] According to a preferred embodiment, the feeding pipe includes a vertical feeding pipe body and an inclined feeding pipe body that are connected in sequence. Among them, the inclined lower end pipe orifice of the inclined feeding pipe body is connected to the pre - processing pipe body. On the side wall of the pipe cavity where the inclined feeding pipe body is connected to the vertical feeding pipe body, there is a buffer inclined plate, and the buffer inclined plate is supported on the inner pipe walls of the inclined feeding pipe body and the vertical feeding pipe body by support springs arranged in an array.

[0009] According to a preferred embodiment, a number of auxiliary teeth capable of accelerating the crushing of ore are circumferentially and arrayed on the roller body of the crushing roller.

[0010] According to a preferred embodiment, the dust reduction assembly includes an inlaid main board, an air suction dust removal mechanism and a water mist dust reduction mechanism. Among them, the inlaid main board is embedded in the top surface of the pre-processing pipe body, and the air suction dust removal mechanism and the water mist dust reduction mechanism are inserted on the inlaid main board in such a way that they respectively penetrate the side and bottom surfaces of the board body in the lumen of the pre-processing pipe body. The two air suction dust removal mechanisms are symmetrically arranged on the inlaid main board.

[0011] According to a preferred embodiment, the air suction dust removal mechanism includes an air inlet groove bar, a first insertion pipe, an air suction and conveying pump, an exhaust pipe and a sedimentation tank. Among them, the air inlet groove bar is installed on the side surface of the inlaid main board facing the output port of the inclined feeding pipe body. The air inlet groove bar is communicated with the exhaust pipe arranged above the inlaid main board through the first insertion pipe penetrating the inlaid main board. And an air suction and conveying pump for driving the air flow in the pipe to flow in a specific direction is arranged at the pipe port where the first insertion pipe is communicated with the exhaust pipe. The output end of the exhaust pipe is inserted into the sedimentation tank installed on the top surface of the inlaid main board.

[0012] According to a preferred embodiment, an inclined blocking net capable of intercepting large-size ore particles is arranged on the air inlet port side of the air inlet groove bar.

[0013] According to a preferred embodiment, the cavity board of the water mist dust reduction mechanism is embedded in the bottom surface of the inlaid main board, and the cavity board is communicated with a water storage tank installed on the top surface of the inlaid main board through a second insertion pipe. Atomizing nozzles communicated with its inner cavity are arrayed and inserted on the lower surface of the cavity board; a pressurizing water pump is arranged at the water inlet of the second insertion pipe.

[0014] According to a preferred embodiment, a rotating shaft is rotatably inserted in the counterattack crusher housing, and a counterattack plate and a sizing plate for crushing ore materials in cooperation with the rotating shaft are also partitioned and arranged on the inner wall surface of the counterattack crusher housing.

[0015] The beneficial effects of the present utility model are:

[0016] The preprocessing component provided in this application can reduce the size of large-sized ores in a way of preprocessing, so as to improve the efficiency and quality of subsequent impact crushing. Moreover, the preprocessing component can also block the feed inlet of the impact crusher housing, thereby effectively intercepting the ore particles splashed by the impact of the blow bars, avoiding the threat to the safety of the staff caused by the ore splashing out of the equipment, and thus greatly improving the processing safety. In addition, the dust reduction component provided in this application can effectively handle the dust generated by the movement and collision during the material transportation process and the dust generated during crushing through the combination of two dust removal methods: suction filtration treatment and water mist spraying dust reduction treatment, greatly reducing the possibility of dust leaking out and floating in the external air, avoiding the harm of dust to the physical health of the staff, and improving the environmental protection performance of the equipment during operation. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a preferred impact crushing device proposed by the present utility model;

[0018] Figure 2 is a schematic structural diagram of the dust reduction component of a preferred impact crushing device proposed by the present utility model.

[0019] List of Reference Numerals

[0020] 1: Support column; 2: Impact crusher housing; 3: Preprocessing component; 4: Screening component; 5: Dust reduction component; 6: Rotating shaft; 7: Impact plate; 8: Levelling plate; 21: Agglomerating lining plate; 31: Installation pipe housing; 32: Crushing roller; 33: Feed pipe; 34: High-torque rotating motor; 311: Preprocessing pipe body; 312: Guide strip plate; 321: Auxiliary teeth; 331: Vertical feed pipe body; 332: Inclined feeding pipe body; 333: Buffer inclined plate; 334: Support spring; 41: Feed hopper; 42: Inclined filter screen; 43: Reciprocating vibration unit; 411: Clamping plate; 412: Side opening; 413: Bottom opening; 51: Inlaid main plate; 52: Suction dust removal mechanism; 53: Water mist dust reduction mechanism; 521: Air inlet groove strip; 522: First interpenetrating pipe; 523: Suction conveying pump; 524: Exhaust pipe; 525: Deposition tank; 526: Inclined retaining net; 531: Cavity plate; 532: Second interpenetrating pipe; 533: Water storage tank; 534: Atomizing nozzle; 535: Pressurized water pump; 61: Blow bar; 62: High-speed rotating motor; 71: First suspension shaft sleeve rod; 81: Second suspension shaft sleeve rod. Detailed Description of the Preferred Embodiment

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the accompanying drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the accompanying drawings is only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings can be obtained based on these drawings without creative efforts.

[0022] The following will refer to the accompanying drawings and describe in detail the technical solutions provided by the present invention through embodiments. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention. In some examples, since some embodiments belong to the prior art or conventional technology, they are not described or not described in detail.

[0023] In addition, the technical features described herein, or the steps in all the methods or processes disclosed, except for mutually exclusive features and / or steps, can also be combined in any suitable manner in one or more embodiments. For those skilled in the art, it is easy to understand that the steps or the order of operations of the methods related to the embodiments provided herein can also be changed. Any order in the accompanying drawings and the embodiments is only for illustrative purposes and does not imply a requirement to follow a certain order, unless it is clearly stated that a certain order is required.

[0024] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the "connection" and "coupling" mentioned in this application, under reasonable circumstances (without self-contradiction), both include direct and indirect connection (coupling).

[0025] The following will be described in detail with reference to the accompanying drawings.

[0026] Embodiment 1

[0027] The present application provides a counterattack crushing device, which includes a support column 1, a counterattack crusher housing 2, a preprocessing component 3, a screening component 4, a dust reduction component 5, a rotating shaft 6, a counterattack plate 7, and a leveling plate 8.

[0028] According to Figure 1 and 2In a specific embodiment shown, the support column 1 suspends the impact crusher housing 2 above the ground. At the upper axial end of the impact crusher housing 2, a preprocessing assembly 3 is provided that can convey the ore materials that have completed preliminary processing into its housing cavity. At the lower axial end of the impact crusher housing 2, a screening assembly 4 for screening the crushed ore materials is also provided. On the preprocessing assembly 3, a dust reduction assembly 5 that can perform dual treatment on the dust is also provided. A rotating shaft 6 is rotatably inserted into the impact crusher housing 2. On the surface of the rotating shaft 6, a plurality of plate hammers 61 are circumferentially and spaced apart. And one end of the rotating shaft 6 penetrates through the housing wall of the impact crusher housing 2 and is connected to a high-speed rotating motor 62. On the inner wall surface of the impact crusher housing 2, an impact plate 7 and a sizing plate 8 that cooperate with the rotating shaft 6 to crush the ore materials are also partitioned. The preprocessing assembly 3 provided in the present application can reduce the size of the ore by preprocessing large-sized ore, so as to improve the efficiency and quality of subsequent impact crushing. And the preprocessing assembly 3 can also block the feed port of the impact crusher housing 2, so as to effectively intercept the ore particles splashed by the driving of the plate hammer 61, avoid the ore splashing out of the equipment and threatening the safety of the staff, thus greatly improving the processing safety. In addition, the dust reduction assembly 5 provided in the present application can effectively treat the dust generated by the movement and collision during the material conveying process and the dust generated during crushing through the combination of two dust removal methods: suction filtration treatment and water mist spraying dust reduction treatment, greatly reducing the possibility of dust leaking out and floating in the external air, avoiding the harm of dust to the physical health of the staff, and improving the environmental protection of the equipment during operation.

[0029] Preferably, on the inner side wall of the impact crusher housing 2 away from the impact plate 7 and the sizing plate 8, a converging lining plate 21 that can limit the falling direction of the material is also provided. Specifically, the converging lining plate 21 is arranged to fit the outer contour of the plate hammer 61 on the rotating shaft 6, so as to block the upper rotating outer gap of the rotating shaft 6, so that the material can be effectively ejected under the driving of the plate hammer 61 on the rotating shaft 6 and impact the impact plate 7. Further preferably, the impact plate 7 and the sizing plate 8 are respectively positioned at their working positions in the impact crusher housing 2 by being adjustably inserted into the housing wall of the impact crusher housing 2 through the first suspension sleeve rod 71 and the second suspension sleeve rod 81.

[0030] Preferably, the pre-processing assembly 3 includes a mounting tube housing 31, crushing rollers 32, a feed pipe 33, and a high-torque rotary motor 34. Preferably, the mounting tube housing 31 is mounted on the top surface of the impact crushing shell 2 so as to communicate with the shell cavity of the impact crushing shell 2. Further preferably, two crushing rollers 32 are arranged in parallel within the pre-processing tube body 311 of the mounting tube housing 31. Further preferably, two feed pipes 33 are inserted into the axial upper end of the pre-processing tube body 311. Preferably, a high-torque rotary motor 34 is mounted on the outer sidewall of the pre-processing tube body 311, capable of driving the two crushing rollers 32 in counter-rotating directions, causing the ore material to fall through the gap between the two crushing rollers 32. Preferably, a dust suppression assembly 5 is mounted on the top surface of the pre-processing tube body 311 between the two feed pipes 33. Preferably, guide strips 312 are mounted on the inner sidewall of the pre-processing tube body 311, directing the ore material conveyed by the feed pipe 33 toward the gap between the two crushing rollers 32. Preferably, the crushing rollers 32 are circumferentially arrayed with a plurality of auxiliary teeth 321 that accelerate ore crushing. The two crushing rollers 32 provided herein can guide the ore material's directional fall and pre-crush oversized ore by rotating in opposite directions, thereby reducing the ore's particle size. This ensures that the ore entering the impact crusher housing 2 has sufficient projection distance and speed during reciprocating collisions, achieving effective fine crushing. The crushing rollers 32 provided herein can initially crush oversized ore, thereby ensuring that the ore is effectively struck and driven by the hammer during the subsequent impact crushing process, thereby improving crushing efficiency, avoiding obstruction to the continuous input of subsequent ore material, and enhancing the efficiency of the continuous crushing process. The crushing rollers 32 provided herein can also form a feed shielding structure, thereby, to a certain extent, preventing ore ejected by the hammer from flying out of the feed port, significantly improving the safety of the crushing process. The two crushing rollers 32 provided herein are spaced a certain distance apart, allowing smaller ore to fall directly through the gap between them, ensuring a continuous supply. The auxiliary teeth 312 provided on the surface of the crushing roller 32 can more effectively and concentratedly bite the surface of the ore during the rotation of the roller body, so that the ore can be effectively crushed by the concentrated external force, thereby improving the efficiency and effect of pre-processing on the crushing of large-sized ores. The high-torque rotary motor 34 used in this application can adopt a low-speed rotary motor with high torque output, so that it can transmit the force to large-sized ores with a harder texture. The feed pipe 33 provided in this application can effectively change the lumen path between the feed port and the crushing roller 32, thereby effectively avoiding the splashing of ore particles during the pre-processing process. The ore particles can be effectively intercepted in the feed pipe 33, thereby improving the safety of ore processing and avoiding the splashing of ore as much as possible to ensure the safety of the staff.

[0031] Preferably, the feed pipe 33 includes a vertical feed pipe body 331 and an inclined material conveying pipe body 332 that are connected in sequence. Specifically, the inclined lower end pipe orifice of the inclined material conveying pipe body 332 is connected to the preprocessing pipe body 311. Preferably, a buffer inclined plate 333 is provided on the side wall of the pipe cavity where the inclined material conveying pipe body 332 is connected to the vertical feed pipe body 331. Further preferably, the buffer inclined plate 333 is supported on the inner pipe walls of the inclined material conveying pipe body 332 and the vertical feed pipe body 331 by support springs 334 arranged in an array. By providing the vertical feed pipe body 331 and the inclined material conveying pipe body 332, the present application changes the path of communication between the preprocessing pipe body 311 and the external environment, thereby preventing the ore materials sputtered in the preprocessing pipe body 311 from flying out of the equipment and injuring the staff near the equipment, greatly improving the safety during operation. The buffer inclined plate 333 and the support springs 334 provided in the present application can cooperate with each other to buffer the input impact force of the ore fed into the equipment, thereby preventing large-sized ores from damaging the equipment structure due to excessive gravity, greatly improving the stability and integrity of the continuous operation of the equipment structure, and extending the service life of the equipment.

[0032] Preferably, the screening assembly 4 includes a feed hopper 41, an inclined filter screen 42, and a reciprocating vibration unit 43. Preferably, the feed hopper 41 is installed on the bottom surface of the counterattack crusher housing 2. Preferably, two parallel clamping plates 411 are provided on two opposite inner side surfaces of the feed hopper 41, so that both sides of the inclined filter screen 42 are placed between the two clamping plates 411 to define its filtering position in the feed hopper 41. Preferably, one side edge of the feed hopper 41 is also connected to the reciprocating vibration unit 43 installed on the side surface of the feed hopper 41, so as to reciprocally shake under the drive of the reciprocating vibration unit 43, thereby effectively screening the ore that has completed the crushing process. Preferably, the reciprocating vibration unit 43 is a conventional vibration motor. Further preferably, the inclined filter screen 42 and the reciprocating vibration unit 43 can be transformed using an existing vibrating screen structure. Preferably, the side surface of the feed hopper 41 is provided with an outlet for discharging the larger-sized ore particles intercepted by the inclined filter screen 42. Further preferably, the bottom of the feed hopper 41 is provided with a bottom opening 413 capable of discharging small-sized particles.

[0033] Preferably, the dust-removing assembly 5 includes an inlaid main board 51, an air-suction dust-removing mechanism 52, and a water mist dust-removing mechanism 53. Preferably, the inlaid main board 51 is embedded in the top surface of the pre-processed pipe body 311. Further preferably, the air-suction dust-removing mechanism 52 and the water mist dust-removing mechanism 53 are inserted on the inlaid main board 51 in such a way that they respectively penetrate the side and bottom surfaces of the board body in the pipe cavity of the pre-processed pipe body 311. Specifically, preferably, the two air-suction dust-removing mechanisms 52 are symmetrically arranged on the inlaid main board 51. The inlaid main board 51 provided in this application is located directly above the two crushing rollers 32, so that the air-suction dust-removing mechanism 52 and the water mist dust-removing mechanism 53 installed on its board body are used to effectively remove the dust generated by the input material and the crushed material through a dual treatment method of suction transfer and humidification sedimentation, avoiding the diffusion of dust to the external environment, avoiding dust pollution to the external environment and at the same time avoiding dust from harming the physical health of the staff, greatly improving the environmental protection and safety of the equipment operation.

[0034] Preferably, the air-suction dust-removing mechanism 52 includes an air inlet groove strip 521, a first insertion pipe 522, an air-suction transfer pump 523, an exhaust pipe 524, and a sedimentation tank 525. Preferably, the air inlet groove strip 521 is installed on the side surface of the inlaid main board 51 facing the output port of the inclined material conveying pipe body 332. Preferably, the air inlet groove strip 521 is communicated with the exhaust pipe 524 arranged above the inlaid main board 51 through the first insertion pipe 522 penetrating the inlaid main board 51. Preferably, an air-suction transfer pump 523 for driving the directional flow of the air flow in the pipe is arranged at the pipe body port where the first insertion pipe 522 is connected to the exhaust pipe 524. Preferably, the output end of the exhaust pipe 524 is inserted into the sedimentation tank 525 installed on the top surface of the inlaid main board 51. Preferably, the output port of the exhaust pipe 524 is inserted into the dust-removing liquid contained in the sedimentation tank 525, so that the gas carrying dust contacts the dust-removing liquid to realize the wetting and precipitation of the dust. Preferably, an inclined blocking net 526 capable of intercepting large-sized ore particles is arranged on the air inlet port side of the air inlet groove strip 521. The air-suction dust-removing mechanism 52 provided in this application can face the input direction of the material, so that it can effectively draw the gas in the crushing space and the input channel, wrap and transfer the dust rising during the crushing process and the dust generated by the conveying collision, effectively cutting off the rising and dispersing path of the dust, and avoiding the rising dust from diffusing from the feeding port to the external environment. Thus, by introducing the gas carrying dust into the dust-removing liquid (i.e., water body) in the sedimentation tank 525, the dust is dissolved in water and deposited, effectively filtering the dust.

[0035] Preferably, the water mist dust suppression mechanism 53 includes a cavity plate 531, a second insertion pipe 532, a water storage tank 533, atomizing nozzles 534 and a pressurizing water pump 535. Preferably, the cavity plate 531 is embedded in the bottom surface of the inlaid main board 51. Further preferably, the cavity plate 531 is communicated with the water storage tank 533 installed on the top surface of the inlaid main board 51 through the second insertion pipe 532. Preferably, atomizing nozzles 534 communicated with its inner cavity are arrayed and inserted on the lower surface of the cavity plate 531. Preferably, a pressurizing water pump 535 is arranged at the water inlet of the second insertion pipe 532. The atomizing nozzles 534 provided in this application can continuously output pressurized water bodies that are pressurized and conveyed to the cavity plate 531 by the pressurizing water pump 535, so that the water bodies can be continuously output in a spray form to wet the rising dust, so that the self-weight of the humidified dust increases and the dust adheres to water and forms a circuit, thereby achieving a high dust suppression effect.

[0036] The present utility model is not limited to the above optional embodiments. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present utility model, they all fall within the protection scope of the present utility model. Those skilled in the art should understand that the description and drawings of the present utility model are illustrative and do not constitute a limitation on the claims. The protection scope of the present utility model is defined by the claims and their equivalents. Throughout the text, the features guided by "preferably" are only an optional manner and should not be understood as must be set. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A counter - impact crushing device, including a counter - impact crusher housing (2) supported on the ground by support columns (1), characterized in that, at the upper axial end of the counter - impact crusher housing (2), a pre - processing component (3) is provided that can convey the ore materials that have completed preliminary processing into its housing cavity, and at the lower axial end of the counter - impact crusher housing (2), a screening component (4) for screening the crushed ore materials is also provided; The installation pipe housing (31) of the pre - processing component (3) is installed on the top surface of the counter - impact crusher housing (2) in a manner communicating with the housing cavity of the counter - impact crusher housing (2). And in the pre - processing pipe body (311) of the installation pipe housing (31), two crushing rollers (32) are arranged in parallel. At the upper axial end of the pre - processing pipe body (311), two feed pipes (33) are inserted in alignment, and a dust - reduction component (5) is provided on the top surface of the pre - processing pipe body (311) between the two feed pipes (33).

2. The impact crusher according to claim 1, wherein On the inner side wall of the pre - processing pipe body (311), guiding strip plates (312) are arranged in alignment to guide the ore materials conveyed by the feed pipes (33) to converge in the gap area between the two crushing rollers (32).

3. The impact crushing device according to claim 2, characterized in that, On the outer side wall of the pre - processing pipe body (311), a high - torque rotating motor (34) is provided that can drive the two crushing rollers (32) to rotate in opposite directions, causing the ore materials to fall from the gap between the two crushing rollers (32).

4. The impact crushing device according to claim 3, characterized in that, The feed pipe (33) includes a vertical feed pipe body (331) and an inclined feed pipe body (332) connected in sequence. Among them, the inclined lower end pipe orifice of the inclined feed pipe body (332) is connected to the pre - processing pipe body (311); On the side wall of the pipe cavity where the inclined feed pipe body (332) is connected to the vertical feed pipe body (331), a buffer inclined plate (333) is provided. The buffer inclined plate (333) is supported on the inner pipe walls of the inclined feed pipe body (332) and the vertical feed pipe body (331) by support springs (334) arranged in an array.

5. The impact crusher according to claim 4, characterized in that, On the roller body of the crushing roller (32), a number of auxiliary teeth (321) for accelerating ore crushing are arranged in a circumferential array.

6. The impact crusher according to claim 5, wherein The dust - reduction component (5) includes an inlaid main plate (51), an air - suction dust - removal mechanism (52), and a water - mist dust - reduction mechanism (53). Among them, the inlaid main plate (51) is embedded in the top surface of the pre - processing pipe body (311), and the air - suction dust - removal mechanism (52) and the water - mist dust - reduction mechanism (53) are inserted on the inlaid main plate (51) in a manner that they respectively penetrate the side plate surface and the bottom surface of the inlaid main plate (51) in the pipe cavity of the pre - processing pipe body (311), the two air - suction dust - removal mechanisms (52) are symmetrically arranged on the inlaid main plate (51).

7. The impact crusher according to claim 6, characterized in that, The air - suction dust - removal mechanism (52) includes an air - inlet groove strip (521), a first through - pipe (522), an air - suction and conveying pump (523), an exhaust pipe (524), and a sedimentation tank (525). Among them, The intake chute bar (521) is installed on the side of the inlaid main plate (51) facing the output port of the inclined feeding pipe body (332). The intake chute bar (521) is communicated with the exhaust pipe (524) arranged above the inlaid main plate (51) through the first insertion pipe (522) penetrating through the inlaid main plate (51), and an air suction and conveying pump (523) for driving the air flow in the pipe to flow in a directional manner is arranged at the pipe body port where the first insertion pipe (522) is communicated with the exhaust pipe (524). The output end of the exhaust pipe (524) is inserted into the sedimentation tank (525) installed on the top surface of the inlaid main plate (51).

8. The impact crusher according to claim 7, characterized in that, An inclined retaining net (526) capable of intercepting large-sized ore particles is arranged on the intake port side of the intake chute bar (521).

9. The impact crusher according to claim 8, characterized in that, The cavity plate (531) of the water mist dust suppression mechanism (53) is embedded on the bottom surface of the inlaid main plate (51), and the cavity plate (531) is communicated with the water storage tank (533) installed on the top surface of the inlaid main plate (51) through a second insertion pipe (532). Atomizing nozzles (534) communicated with its inner cavity are arrayed and inserted on the lower surface of the cavity plate (531). A pressurized water pump (535) is arranged at the water inlet of the second insertion pipe (532).

10. The impact crusher according to claim 9, characterized in that, A rotating shaft (6) is rotatably inserted into the impact crusher housing (2). On the inner wall surface of the impact crusher housing (2), a counterattack plate (7) and a sizing plate (8) for crushing ore materials in cooperation with the rotating shaft (6) are also arranged in a partitioned manner.

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