Coal mine crushing device for coal mining and using method thereof

Abstract

The invention discloses a coal mine crushing device for coal mining and a using method thereof.The coal mine crushing device for coal mining comprises a crushing box and a mounting plate mounted on the crushing box; the first leakage net is mounted on the crushing box; the second leakage net is connected to the crushing box in a sliding manner; the driving assembly is mounted on the crushing box and is used for driving the second leakage net to slide; the crushing assembly is mounted on the crushing box and the mounting plate and is used for crushing coal mine; the coal mine is guided into the crushing box through the feeding assembly, and the coal mine is discharged through the discharging assembly after being crushed. Through the design that the slidable second leakage net is matched with the first leakage net, the overlap ratio of the two net leakage grooves is accurately controlled, stepless and continuous adjustment of the discharging granularity is achieved, the requirement for different product granularities can be rapidly met without halting and replacing a sieve plate like a traditional crusher, and the production flexibility and market adaptability of equipment are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining, in particular to a coal mine crushing device for coal mining and a use method thereof. BACKGROUND

[0002] In the coal mine pretreatment process, the crushing device undertakes the task of crushing raw coal to a specified particle size to meet the requirements of subsequent washing, transportation or direct sales. The uniformity and adjustability of the crushing particle size are directly related to the product value and the efficiency of the downstream process. Therefore, a crushing device that can flexibly control the discharge particle size and intelligently respond to overload is crucial to improving the economic benefits and stability of the entire production line.

[0003] In the prior art, the discharge particle size of traditional crushers (such as hammer crushers) is mainly controlled by a fixed grid at the bottom. To change the discharge particle size, the machine must be stopped and the grid with a different gap must be replaced, which is cumbersome and cannot meet the demand for flexible adjustment of product specifications in production, resulting in poor adaptability of the device. In addition, since replacing the fixed grid is a heavy and must-stop operation, workers not only have high labor intensity and take a long time in the process of opening the machine shell, disassembling and installing the heavy grid, but also face the risk of mechanical injury and contact with residual dust. Frequent replacement directly amplifies these safety and efficiency risks. The high-speed rotating hammer head in the crushing process can cause stones to splash. The traditional protective measure is to use a sealing door for protection. However, when the sealing door is opened for feeding, a protective gap is formed, which can cause stones to fly out and cause injury to the surrounding area. SUMMARY

[0004] The purpose of the present application is to provide a coal mine crushing device for coal mining and a use method thereof to solve the problems of poor grid applicability, frequent replacement with certain risks, and danger of sealing door sealing during continuous operation as described in the background.

[0005] To achieve the above purpose, the present application provides the following technical solution: a coal mine crushing device for coal mining, comprising a crushing box and a mounting plate mounted on the crushing box, further comprising a first screen installed on the crushing box, a second screen slidingly connected to the crushing box, a driving assembly installed on the crushing box to drive the second screen to slide, a crushing assembly installed on the crushing box and the mounting plate to crush coal mines, a feeding assembly installed on the crushing box, and a discharge assembly installed on the mounting plate. The coal mine is guided into the crushing box through the feeding assembly, and the crushed coal mine is discharged through the discharge assembly.

[0006] Based on the preferred technical solution, the first screen and the second screen are both provided with a screen groove, and the first screen and the second screen are stacked.

[0007] Based on the preferred technical scheme, the chute is arranged at the corresponding position of the second screen, and the second screen slides in the chute.

[0008] Based on the preferred technical scheme, the driving assembly comprises a first hinged seat mounted on the crushing box, a second hinged seat mounted on the second screen, and an electric telescopic rod rotationally connected between the first hinged seat and the second hinged seat, and the electric telescopic rod drives the second screen to slide through the second hinged seat.

[0009] Based on the preferred technical scheme, the crushing assembly comprises a convex strip mounted in the crushing box, a first motor mounted on the mounting plate, a rotating shaft mounted on the output end of the first motor, a connecting disc fixedly connected to the rotating shaft, a connecting shaft mounted on the connecting disc, and a crushing hammer rotationally connected to the connecting shaft, and the rotating shaft is rotationally connected to the mounting plate.

[0010] Based on the preferred technical scheme, the crushing hammer is provided with a plurality of crushing hammers arranged in a staggered manner, and the convex strip is provided with a plurality of convex strips evenly distributed in a circumferential array in the crushing box.

[0011] Based on the preferred technical scheme, the feeding assembly comprises a feeding port mounted on the crushing box, a positioning plate mounted on the feeding port, a third hinged seat mounted on the positioning plate, a baffle rotationally connected to the third hinged seat, and a torsional spring fixedly connected between the baffle and the third hinged seat.

[0012] Based on the preferred technical scheme, the plurality of baffles are in contact with each other, and the baffle is in contact with the positioning plate.

[0013] Based on the preferred technical scheme, the discharging assembly comprises a base mounted on the mounting plate, a second motor mounted on the base, a conveying belt mounted on the output end of the second motor, and a guide plate mounted on the base, and the conveying belt is rotationally connected to the base.

[0014] A coal mine crushing device for coal mining and a use method thereof, comprising a coal mine crushing device for coal mining as described above, and the steps are as follows: Step one: the electric telescopic rod is connected to the control panel through the circuit, the electric telescopic rod is controlled to extend and retract, the electric telescopic rod drives the second screen to slide through the second hinged seat, and the second screen is staggered with the first screen.

[0015] Step two: add coal into the crushing box through the feeding port, the coal will be turned over when it contacts the baffle, the baffle rotates on the third hinged seat and deforms the torsional spring to store energy, according to the size of the coal, a plurality of baffles will be opened, after the coal enters the feeding port, the torsional spring releases energy to drive the baffle to reset, and the baffle resets through the positioning plate.

[0016] Step three: the coal mine is guided into the crushing box through the feed inlet, the first motor drives the rotating shaft to rotate, the rotating shaft drives the crushing hammer to rotate through the connecting disc and the connecting shaft, the crushing hammer cooperates with the crushing box and the convex strip to crush the coal mine, and the coal mine with appropriate size falls into the base through the leakage slots of the first and second leakage screens.

[0017] Step four: the coal mine falling into the base is guided by the guide plate to slide on the surface of the conveying belt, the second motor drives the conveying belt to run, the coal mine on the surface is conveyed out of the base, and the crushed coal mine is collected by the external collecting device. Compared with the prior art, the beneficial effects of the present application are: 1. By the design of the slidable second leakage screen cooperating with the first leakage screen, the coincidence degree of the leakage slots of the two screens is accurately controlled, the stepless and continuous adjustment of the discharge particle size is realized, the product particle size requirements of different products can be quickly adapted without stopping and replacing the screen plate like the traditional crusher, the production flexibility and market adaptability of the equipment are greatly improved, and the diversified production requirements are met.

[0018] 2. The size of the leakage slot can be automatically adjusted without manual replacement inside the device, avoiding the danger of workers when replacing the grid and ensuring the safety of work.

[0019] 3. The automatic opening and closing baffle group of the feed inlet ensures the continuous feeding while ensuring the normally closed state of the crushing cavity, effectively suppresses the dust dispersion and stone splashing risk, provides higher safety protection for the operator, and improves the sanitary environment of the work site. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of one embodiment of the coal mine crushing device and the use method of the coal mine crushing device; Figure 2 is a sectional view of the crushing box and the mounting plate; Figure 3 is a sectional view of the crushing box; Figure 4 is a sectional view of the first and second leakage screens; Figure 5 is a structural schematic view of the feed assembly; Figure 6 is a partial structural schematic view of the feed assembly; Figure 7 is a structural schematic view of the discharge assembly.

[0021] In the figure: 21, crushing box; 22, mounting plate; 23, first screen; 24, second screen; 31, first hinged seat; 32, second hinged seat; 33, electric telescopic rod; 41, convex strip; 42, first motor; 43, rotating shaft; 44, connecting disc; 45, connecting shaft; 46, crushing hammer; 51, feeding port; 52, positioning plate; 53, third hinged seat; 54, baffle; 55, torsional spring; 61, base; 62, second motor; 63, conveying belt; 64, guide plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] Please refer to Figure 1 - Figure 7 The present application provides an embodiment: a coal mine crushing device for coal mining, comprising a crushing box 21 and a mounting plate 22 mounted on the crushing box 21, further comprising a first screen 23 mounted on the crushing box 21, a second screen 24 slidingly connected to the crushing box 21, a driving assembly mounted on the crushing box 21 for driving the second screen 24 to slide, a crushing assembly mounted on the crushing box 21 and the mounting plate 22 for crushing coal, a feeding assembly mounted on the crushing box 21, and a discharging assembly mounted on the mounting plate 22. The coal is guided into the crushing box 21 through the feeding assembly, and the crushed coal is discharged through the discharging assembly. Through the combination of the slidable second screen 24 and the first screen 23, the particle size of the discharged material is steplessly adjustable, and there is no need to stop the machine to replace the screen. The automatic opening and closing structure of the feeding assembly effectively prevents the stones from splashing while ensuring continuous feeding. The overall structure is compact, the degree of automation is high, and the flexibility and safety of the crushing operation are significantly improved.

[0024] Please refer to Figure 3 - Figure 4 Based on the further scheme of the present embodiment, the first screen 23 and the second screen 24 are both provided with a leakage groove, and the first screen 23 and the second screen 24 are stacked. The leakage grooves on the two screens can form different effective through sections through relative sliding. When the leakage grooves are completely aligned, the particle size is the largest. The greater the misalignment degree, the smaller the effective screen size, so that the particle size of the discharged material is continuously and accurately adjusted, and the adaptability of the equipment to different coal specifications is greatly enhanced.

[0025] Please refer to Figure 3A further solution based on this embodiment is as follows: the crushing box 21 has a chute at the corresponding position of the second screen 24, and the second screen 24 slides inside the chute. The chute provides a high-precision arc-shaped motion guide for the second screen 24, ensuring that it slides smoothly and without jamming, and can accurately stop at the target position to maintain the set screening particle size. At the same time, the chute structure also bears the main load of the second screen 24, ensuring its long-term working stability in the crushing vibration environment.

[0026] Please see Figure 3 A further solution based on this embodiment is as follows: the drive assembly includes a first hinge seat 31 mounted on the crushing box 21, a second hinge seat 32 mounted on the second mesh 24, and an electric telescopic rod 33 rotatably connected between the first hinge seat 31 and the second hinge seat 32. The electric telescopic rod 33 extends and retracts, driving the second mesh 24 to slide through the second hinge seat 32. The electric telescopic rod 33 serves as a power source and can achieve precise stroke control through an external control system. The hinge connection at both ends can automatically adapt to the slight changes in the position and angle of the connection point during the extension and retraction process, effectively preventing motion interference and additional stress, and ensuring the reliability and lifespan of the drive action.

[0027] Please see Figure 1 - Figure 3 A further embodiment of this solution is as follows: The crushing assembly includes a protrusion 41 installed inside the crushing box 21, a first motor 42 installed on the mounting plate 22, a rotating shaft 43 installed at the output end of the first motor 42, a connecting plate 44 fixedly connected to the rotating shaft 43, a connecting shaft 45 installed on the connecting plate 44, and a breaker hammer 46 rotatably connected to the connecting shaft 45. The rotating shaft 43 is rotatably connected to the mounting plate 22. The first motor 42 drives the rotating shaft 43 and the connecting plate 44 to rotate at high speed. The connecting shaft 45 drives the breaker hammer 46 to make a circular motion. The breaker hammer 46 is thrown out under the action of centrifugal force and powerfully strikes the coal mine. Its hinged design allows it to swing and avoid certain objects when it encounters uncrushable objects, thus playing an overload protection role.

[0028] Please see Figure 2 - Figure 3 A further solution based on this embodiment is as follows: a plurality of hydraulic breakers 46 are provided, and the plurality of hydraulic breakers 46 are arranged in an alternating manner; a plurality of convex strips 41 are provided, and the plurality of convex strips 41 are evenly distributed in a circumferential array inside the crushing chamber 21; the multiple hydraulic breakers 46 arranged in an alternating manner expand the effective working area in the crushing chamber and reduce crushing dead angles; the circumferential array of convex strips 41 is coordinated with the movement trajectory of the hydraulic breakers 46, which not only enhances the impact, compression and grinding effect on the coal block and improves the crushing efficiency, but also plays a turbulence role, promotes the mixing of materials in the chamber, and makes the crushing more uniform.

[0029] Please seeFigure 1 、 Figure 5 - Figure 6 Further based on the embodiment, the feeding assembly comprises a feeding port 51 mounted on the crushing box 21, a positioning plate 52 mounted on the feeding port 51, a third hinge seat 53 mounted on the positioning plate 52, a baffle 54 rotatably connected to the third hinge seat 53, and a torsional spring 55 fixedly connected between the baffle 54 and the third hinge seat 53, and a flap valve is formed by the baffle 54, when feeding, the baffle 54 is rotated to open around the third hinge seat 53 under the gravity of the material, and after the feeding is completed, the restoring torque of the torsional spring 55 drives the baffle 54 to automatically reset and close, which realizes the normally closed state of the feeding port 51, effectively blocks the dust and fragments generated in the crushing process from splashing outward, and ensures the operation safety.

[0030] Please refer to Figure 6 Further based on the embodiment, the plurality of baffles 54 are in close contact with each other and in contact with the positioning plate 52, the plurality of baffles 54 are in close contact with each other and abut against the positioning plate 52 under the action of the torsional spring 55, and a composite sealing surface is formed, even if an individual baffle 54 fails to completely reset due to the shape of the material, other baffles 54 can still maintain most of the sealing effect, greatly enhancing the reliability of the splashing protection.

[0031] Please refer to Figure 1 、 Figure 7 Further based on the embodiment, the discharging assembly comprises a base 61 mounted on the mounting plate 22, a second motor 62 mounted on the base 61, a conveying belt 63 mounted on the output end of the second motor 62, and a guide plate 64 mounted on the base 61, the conveying belt 63 is rotatably connected to the base 61, the guide plate 64 collects and guides the falling material to the effective load section of the conveying belt 63, also reduces the impact of the coal mine on the conveying belt 63, the second motor 62 drives the conveying belt 63 to operate, stably conveying the crushed coal meeting the particle size requirement to the next process or collection point, avoiding the accumulation of the material at the discharge port, and ensuring the smooth operation of the production line.

[0032] Please refer to Figure 1 - Figure 7 In the embodiment, the coal mine crushing device for coal mining and the use method thereof are provided, and the coal mine crushing device comprises the following steps: Step one: the electric telescopic rod 33 is externally connected to the control panel through the circuit, the electric telescopic rod 33 is controlled to stretch and retract, the electric telescopic rod 33 stretches and retracts to drive the second mesh screen 24 to slide through the second hinge seat 32, and the leakage grooves of the second mesh screen 24 and the leakage grooves of the first mesh screen 23 are staggered.

[0033] Step two: add coal mine into the inside of the crushing box 21 through the feeding port 51, the coal mine will be turned over when it contacts the baffle 54, the baffle 54 rotates on the third hinge seat 53 and makes the torsional spring 55 deform to store energy, according to the size of the coal mine, it will open several baffles 54, after the coal mine enters into the inside of the feeding port 51, the torsional spring 55 releases energy to drive the baffle 54 to reset, the baffle 54 resets through the positioning plate 52.

[0034] Step three: the coal mine is guided into the inside of the crushing box 21 through the feeding port 51, the first motor 42 drives the rotating shaft 43 to rotate, the rotating shaft 43 drives the crushing hammer 46 to rotate through the connecting disc 44 and the connecting shaft 45, the crushing hammer 46 crushes the coal mine in cooperation with the crushing box 21 and the convex strip 41, the coal mine with appropriate size falls into the base 61 through the leakage slot of the first leakage net 23 and the second leakage net 24.

[0035] Step four: the coal mine falling into the base 61 is guided by the guide plate 64 to slide on the surface of the conveying belt 63, the second motor 62 drives the conveying belt 63 to run to convey the coal mine on the surface to the outside of the base 61, and the crushed coal mine is collected through the external collecting device.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal mining crushing device, comprising a crushing box (21) and a mounting plate (22) installed on the crushing box (21), characterized in that: It also includes a first screen (23) installed on the crushing box (21), a second screen (24) slidably connected to the crushing box (21), a drive assembly installed on the crushing box (21) to drive the second screen (24) to slide, a crushing assembly installed on the crushing box (21) and the mounting plate (22) to crush coal, a feeding assembly installed on the crushing box (21) and a discharge assembly installed on the mounting plate (22). The feeding assembly guides the coal into the crushing box (21), and the crushed coal is discharged through the discharge assembly.

2. A coal mine crushing device for coal mining according to claim 1, characterized in that: Both the first mesh (23) and the second mesh (24) have grooves, and the first mesh (23) and the second mesh (24) are stacked.

3. A coal mine crushing device for coal mining according to claim 1, characterized in that: The crushing box (21) has a groove at the corresponding position of the second mesh (24), and the second mesh (24) slides inside the groove.

4. A coal mine crushing device for coal mining according to claim 1, characterized in that: The drive assembly includes a first hinge seat (31) mounted on the crushing box (21), a second hinge seat (32) mounted on the second screen (24), and an electric telescopic rod (33) rotatably connected between the first hinge seat (31) and the second hinge seat (32). The electric telescopic rod (33) extends and retracts through the second hinge seat (32) to drive the second screen (24) to slide.

5. A coal mine crushing device for coal mining according to claim 1, characterized in that: The crushing assembly includes a protrusion (41) installed inside the crushing box (21), a first motor (42) installed on the mounting plate (22), a rotating shaft (43) installed at the output end of the first motor (42), a connecting plate (44) fixedly connected to the rotating shaft (43), a connecting shaft (45) installed on the connecting plate (44), and a crushing hammer (46) rotatably connected to the connecting shaft (45). The rotating shaft (43) is rotatably connected to the mounting plate (22).

6. A coal mine crushing device for coal mining according to claim 5, characterized in that: There are several hydraulic breakers (46), and the several hydraulic breakers (46) are arranged in an alternating manner. There are several convex strips (41), and the several convex strips (41) are evenly distributed in a circumferential array inside the crushing box (21).

7. A coal mine crushing device for coal mining according to claim 1, characterized in that: The feeding assembly includes a feed inlet (51) mounted on the crushing box (21), a positioning plate (52) mounted on the feed inlet (51), a third hinge seat (53) mounted on the positioning plate (52), a baffle (54) rotatably connected to the third hinge seat (53), and a torsion spring (55) fixedly connected between the baffle (54) and the third hinge seat (53).

8. A coal mine crushing device for coal mining according to claim 7, characterized in that: Several baffles (54) are attached to each other, and the baffles (54) are in contact with the positioning plate (52).

9. A coal mine crushing device for coal mining according to claim 1, characterized in that: The discharge assembly includes a base (61) mounted on a mounting plate (22), a second motor (62) mounted on the base (61), a conveyor belt (63) mounted on the output end of the second motor (62), and a guide plate (64) mounted on the base (61). The conveyor belt (63) is rotatably connected to the base (61).

10. A coal mine crushing device for coal mining and its method of use, characterized in that... The coal mine crushing device according to claims 1-8 includes the following steps: Step 1: The electric telescopic rod (33) is connected to the control panel via the circuit to control the extension and retraction of the electric telescopic rod (33). The extension and retraction of the electric telescopic rod (33) drives the second mesh (24) to slide through the second hinge seat (32). The groove of the second mesh (24) is intersected with the groove of the first mesh (23). Step 2: Coal is added into the crushing box (21) through the feed inlet (51). When the coal comes into contact with the baffle (54), it will flip over. While the baffle (54) rotates on the third hinge seat (53), the torsion spring (55) will deform and store energy. Depending on the size of the coal, several baffles (54) will be opened accordingly. After the coal enters the feed inlet (51), the torsion spring (55) releases energy to drive the baffle (54) to reset. The reset of the baffle (54) is restricted by the positioning plate (52). Step 3: The coal is guided into the crushing box (21) through the feed inlet (51). The first motor (42) drives the rotating shaft (43) to rotate. The rotating shaft (43) drives the breaker hammer (46) to rotate through the connecting plate (44) and the connecting shaft (45). The breaker hammer (46) works with the crushing box (21) and the protruding bar (41) to crush the coal. The coal of appropriate size falls into the base (61) through the troughs of the first screen (23) and the second screen (24). Step 4: The coal that falls into the base (61) is guided by the guide plate (64) and slides onto the surface of the conveyor belt (63). The second motor (62) drives the conveyor belt (63) to run and transport the coal on its surface to outside the base (61). The crushed coal is collected by the external receiving and collecting device.

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