Crushing mechanism of impact shovel coal mining machine

Abstract

The utility model relates to the technical field of crushing mechanisms of coal mining machines, in particular to a crushing mechanism of an impact shovel coal mining machine, which comprises a support arm, the support arm comprises a support part, one end of the support part is rotatably connected with a crushing roller, one end of the support part is rotatably provided with a protective plate, the top of the crushing roller is provided with a crushing cover, and the protective plate is arranged on the top of the crushing cover. The crushing cover is fixedly connected with the supporting part, and an intercepting mechanism is arranged at one end of the crushing cover. According to the utility model, the plurality of sleeves I are arranged on the rear side of the crushing roller, the sleeves II are arranged in the sleeves I in a sliding manner, the insertion rods are arranged in the sleeves II in a sliding manner, and the insertion rods, the sleeves I and the sleeves II form an interception rod which is arranged behind the crushing roller, so that when large-size coal briquettes are conveyed to the position of the interception rod along with the conveyor, the large-size coal briquettes can be intercepted; and the intercepting rod prevents large-size coal briquettes from passing through the intercepting rod, so that the large-size coal briquettes can be fully crushed, and the phenomenon that the conveyor conveys the coal briquettes which are not fully crushed to the bottom of the coal mining machine to cause blockage is prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of crushing mechanisms for coal mining machines, specifically a crushing mechanism for a punching coal mining machine. Background Technology

[0002] The punching coal mining machine is an advanced piece of equipment that uses high-pressure water jets to crush coal seams. The machine mainly consists of a cutting section, a water jet section, a slipper, a crushing mechanism, and a scraper conveyor. During operation, the cutting rollers on the cutting section, combined with the water jet section, use water to impact the coal seam to crush it. The coal blocks fall onto the scraper conveyor and are transported outwards. The crushing mechanism, located above the scraper conveyor, further crushes the coal blocks, preventing large coal blocks from getting stuck at the bottom of the mining machine as they are conveyed. At the same time, the crushed coal blocks are also convenient for subsequent processing.

[0003] The crushing mechanism mainly consists of a crushing drum, a swing arm, and a hydraulic cylinder. The crushing drum rotates to crush coal blocks on the surface of the conveyor. When it encounters a large coal block, the hydraulic cylinder drives the swing arm to move upward, so that the crushing drum can fully crush the coal block from the top down. However, in actual use, the conveyor is constantly conveying coal blocks while the swing arm is moving the crushing drum upward. This causes coal blocks that are not fully crushed to leave the crushing drum along the conveyor, affecting the crushing effect. Furthermore, when the crushing drum rotates to crush coal blocks, some coal blocks will fall onto the outside of the conveyor along with the rotating crushing drum, requiring later collection and cleaning of the fallen coal blocks, increasing the burden of coal transportation. Utility Model Content

[0004] The purpose of this utility model is to provide a crushing mechanism for a punching coal mining machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A crushing mechanism for a punching coal mining machine includes:

[0007] A support arm is rotatably mounted to a coal mining machine. The support arm includes a support part, one end of which is rotatably connected to a crushing drum.

[0008] A protective plate is installed and fixed at one end of the support. The protective plate can prevent coal blocks from being thrown out from one end of the crushing drum. The inner side of the protective plate is provided with a mesh that can suck up dust.

[0009] A crushing hood is installed on top of the crushing drum, and the crushing hood is fixedly connected to the support part;

[0010] An interception mechanism is installed at one end of the crushing hood. The interception mechanism includes a crossbeam rotatably connected to the crushing hood. Multiple sleeves are fixed at equal intervals on the bottom surface of the crossbeam. A second sleeve is slidably engaged on the inner side of the first sleeve, and an insert rod is slidably engaged on the inner side of the second sleeve.

[0011] Furthermore, the support arm also includes:

[0012] A connecting lug 1 is fixed to one end of the support part, and the connecting lug 1 is rotatably installed with the coal mining machine;

[0013] Connect ear two and fix it to the bottom of the support part;

[0014] The hydraulic cylinder is rotatably connected at one end to the connecting lug 2 and at the other end to the coal mining machine.

[0015] Furthermore, a baffle is fixed to one end of the crushing hood, and the baffle is fixedly connected to the support.

[0016] Furthermore, the crushing hood has an arc-shaped chamber inside, one end of the crushing hood is connected to and fixed with a plurality of nozzles that are all connected to the arc-shaped chamber, and the outside of the crushing hood is fixed with a water inlet pipe that is connected to the arc-shaped chamber.

[0017] Furthermore, the interception mechanism also includes a motor embedded and fixed to the support, and the output end of the motor is fixedly connected to the crossbeam.

[0018] Furthermore, the protective plate has multiple conical blocks evenly fixed on its inner side, and a rectangular cavity communicating with the mesh is opened inside the protective plate.

[0019] Furthermore, a suction tube is fixed to the outside of the protective plate, and the suction tube is connected to the rectangular cavity.

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

[0021] 1. A crossbeam is rotatably connected to the rear side of the crushing drum. Multiple sleeves are fixed to the bottom surface of the crossbeam. Sleeves 1 and 2 are slidably engaged inside each sleeve. Insert rods are slidably engaged inside each sleeve. In the initial state, under the weight of the insert rod and sleeve 2, the insert rod slides down and extends out from inside sleeve 2, and sleeve 2 slides down and extends out from inside sleeve 1. This allows multiple intercepting bars composed of sleeves (including sleeve 1 and sleeve 2) and insert rods to intercept larger coal blocks. The coal blocks intercepted by the intercepting bars can be fully crushed by the crushing drum. Coal blocks of suitable size are conveyed out through the gap between two adjacent intercepting bars by the scraper conveyor, preventing insufficiently crushed coal blocks from leaving the crushing drum along the conveyor, which helps to improve the coal crushing effect.

[0022] 2. By rotating the crossbeam between the support arm and the crushing hood, the motor drives the crossbeam to rotate when the swing arm moves upward, ensuring that multiple intercepting rods are always vertically facing the conveyor below the crushing drum. This prevents the intercepting rods from moving with the support arm, thus achieving the effect of intercepting larger coal blocks at all times. Because the insert rod can move up and down inside the second sleeve, and the second sleeve can slide up and down inside the sleeve, the intercepting rods can adaptively adjust their length when the support arm moves up and down with the crushing drum, meeting the requirement of intercepting large coal blocks at different heights of the crushing drum.

[0023] 3. By installing a protective plate at one end of the crushing drum, the protective plate can prevent coal chunks from spilling to the outside as the crushing drum rotates. At the same time, multiple conical blocks are evenly fixed on the inner side of the protective plate. When the spilled coal chunks hit the conical blocks, the conical blocks can promote the crushing of the coal chunks to a certain extent, further improving the crushing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model and the external coal mining machine;

[0025] Figure 2 This is a schematic diagram of the overall structure of this utility model. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the overall structure of this utility model. Figure 2 ;

[0027] Figure 4 This is a utility model Figure 3 A magnified view of the structure at point A in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the crushing cover and interception mechanism in this utility model.

[0029] In the diagram: 100, support arm; 110, support section; 111, mounting column; 120, crushing drum; 130, connecting lug one; 140, connecting lug two; 150, hydraulic cylinder; 200, protective plate; 210, mesh; 220, cone block; 230, suction pipe; 300, crushing cover; 310, arc-shaped chamber; 320, nozzle; 330, water inlet pipe; 340, baffle; 400, interception mechanism; 410, crossbeam; 420, sleeve one; 430, sleeve two; 440, insertion rod; 450, motor; 460, slot; 500, coal mining machine body. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1, please refer to Figure 1 - Figure 5 In this embodiment of the utility model, a crushing mechanism for a punching coal mining machine includes a support arm 100 rotatably mounted to the coal mining machine. The support arm 100 includes a support part 110, one end of which is rotatably connected to a crushing drum 120. A protective plate 200 is installed at one end of the support part 110, which can prevent coal blocks from being thrown out from one end of the crushing drum 120. A mesh 210 for dust extraction is opened on the inner side of the protective plate 200. A crushing cover 300 is provided on the top of the crushing drum 120, which is fixedly connected to the support part 110. An interception mechanism 400 is provided at one end of the crushing cover 300. The interception mechanism 400 includes a crossbeam 410 rotatably connected to the crushing cover 300. Multiple sleeves 420 are fixed at equal intervals on the bottom surface of the crossbeam 410. A sleeve 430 is slidably engaged on the inner side of the sleeve 420, and an insert rod 440 is slidably engaged on the inner side of the sleeve 430.

[0032] Specifically, multiple sleeves 420 are installed on the rear side of the crushing drum 120. A second sleeve 430 slides inside the first sleeve 420, and an insert rod 440 slides inside the second sleeve 430. The insert rod 440, sleeves 420, and second sleeve 430 together form an intercepting bar positioned behind the crushing drum 120. When large coal blocks are conveyed to the intercepting bar position by the external conveyor, the intercepting bar prevents the large coal blocks from passing through, allowing the crushing drum 120 to crush the coal blocks for an extended period. This facilitates thorough crushing of large coal blocks and prevents the conveyor from conveying insufficiently crushed coal blocks to the bottom of the coal mining machine, causing blockages. Simultaneously, a protective plate 200 is installed at one end of the crushing drum 120. The protective plate 200 prevents coal blocks from spilling onto the outside of the conveyor as the crushing drum 120 rotates, ensuring a clean and tidy mining environment.

[0033] like Figure 2 and Figure 3 As shown, in this embodiment, the support arm 100 includes a connecting ear 130 fixed to one end of the support part 110. The connecting ear 130 is rotatably installed with the coal mining machine. A connecting ear 2 140 is fixed to the bottom of the support part 110. A hydraulic cylinder 150 is provided between the connecting ear 2 140 and the coal mining machine. One end of the hydraulic cylinder 150 is rotatably connected to the connecting ear 2 140, and the other end of the hydraulic cylinder 150 is rotatably connected to the connecting ear 2 140.

[0034] In this embodiment, the extension of the output end of the hydraulic cylinder 150 enables the support arm 100 to move upward along with the crushing drum 120, which facilitates the crushing of large coal blocks from top to bottom. The hydraulic cylinder 150 driving the support part 110 to move up and down is existing technology. The working principle of the hydraulic drive of the support part 110 to move is not described in detail.

[0035] like Figure 2 As shown, in this embodiment, a baffle 340 is fixed to one end of the crushing cover 300. The baffle 340 is fixedly connected to the support part 110, so that the crushing cover 300 is installed and fixed on the top of the crushing drum 120 to prevent coal blocks from splashing upwards.

[0036] like Figure 2 and Figure 5 As shown, in this embodiment, the motor 450 is embedded and fixed inside the support 110, and one end of the crossbeam 410 is rotatably connected through a rotating seat, which is fixed to the outside of the crushing cover 300.

[0037] In this embodiment, the interception mechanism 400 also includes a motor 450 embedded and fixed to the support part 110. The output end of the motor 450 is fixedly connected to the crossbeam 410. The output end of the motor 450 drives the crossbeam 410 to rotate, causing the crossbeam 410 to rotate with multiple interception rods composed of a first sleeve 420, a second sleeve 430, and an insert rod 440, so that the interception rods can always be vertically arranged behind the crushing drum 120 during the rotation of the support part 110.

[0038] like Figure 5 As shown, in this embodiment, the outer sides of both the second sleeve 430 and the insertion rod 440 are provided with slots 460, and the inner sides of both the first sleeve 420 and the second sleeve 430 are fixed with locking blocks that are slidably engaged with the corresponding slots 460, so that the first sleeve 420, the second sleeve 430 and the insertion rod 440 will not detach from each other.

[0039] like Figure 3 As shown, in this embodiment, a plurality of conical blocks 220 are uniformly fixed on the inner side of the protective plate 200, so that when the spilled coal blocks hit the protective plate 200, the conical blocks 220 can break the coal blocks.

[0040] like Figure 2 As shown, in this embodiment, an installation column 111 is fixed on the outer side of the support 110, and the top of the protective plate 200 is fixedly installed with the installation column 111. The protective plate 200 can move synchronously with the movement of the crushing drum 120, so as to always cover one end of the crushing drum 120 and prevent coal blocks from falling.

[0041] like Figure 2 and Figure 3As shown, in this embodiment, the protective plate 200 has a rectangular chamber inside that communicates with the mesh 210. A suction pipe 230 is fixed on the outside of the protective plate 200. The suction pipe 230 communicates with the rectangular chamber. The pipe of the external dust suction equipment is connected and fixed to the suction pipe 230, so that the suction pipe 230 draws airflow into the rectangular chamber, thereby realizing the dust generated during the crushing of coal blocks being extracted and cleaned by the mesh 210.

[0042] Example 2, based on Example 1, aims to reduce dust by spraying water during the crushing process of the crushing drum 120.

[0043] like Figure 3 - Figure 5 The crushing shroud 300 has an arc-shaped chamber 310 inside. One end of the crushing shroud 300 is connected to and fixed with a plurality of nozzles 320, all of which are connected to the arc-shaped chamber 310. The outside of the crushing shroud 300 is fixed with a water inlet pipe 330 connected to the arc-shaped chamber 310.

[0044] In this embodiment, the external water pumping pipe is pre-connected and fixed to the water inlet pipe 330, so that the water is delivered into the arc-shaped chamber 310 and then sprayed from multiple nozzles 320 onto the outside of the crushing drum 120. This facilitates the use of water mist to reduce the dust generated during the crushing of coal blocks and ensures a clean and tidy crushing environment.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A crushing mechanism for a punching and scraping coal mining machine, characterized in that, include: The support arm (100) is rotatably installed with the coal mining machine. The support arm (100) includes a support part (110), and one end of the support part (110) is rotatably connected to a crushing drum (120). A protective plate (200) is installed and fixed at one end of the support (110). The protective plate (200) can prevent coal blocks from being thrown out from one end of the crushing drum (120). The inner side of the protective plate (200) is provided with a mesh (210) that can suck up dust. A crushing hood (300) is installed on top of the crushing drum (120), and the crushing hood (300) is fixedly connected to the support (110); An interception mechanism (400) is set at one end of the crushing cover (300). The interception mechanism (400) includes a crossbeam (410) rotatably connected to the crushing cover (300). Multiple sleeves (420) are fixed at equal intervals on the bottom surface of the crossbeam (410). A sleeve (430) is slidably engaged on the inner side of the sleeve (420). A rod (440) is slidably engaged on the inner side of the sleeve (430).

2. The crushing mechanism of the punching and scraping coal mining machine according to claim 1, characterized in that, The support arm (100) also includes: Connecting ear 1 (130) is fixed to one end of the support part (110), and connecting ear 1 (130) is rotatably installed with the coal mining machine; Connecting ear 2 (140) is fixed to the bottom of the support (110); The hydraulic cylinder (150) is rotatably connected at one end to the connecting lug 2 (140) and rotatably connected at the other end to the coal mining machine.

3. The crushing mechanism of the punching and scraping coal mining machine according to claim 1, characterized in that, A baffle (340) is fixed to one end of the crushing hood (300), and the baffle (340) is fixedly connected to the support (110).

4. The crushing mechanism of the punching and scraping coal mining machine according to claim 1, characterized in that, The inside of the crushing shroud (300) is provided with an arc-shaped chamber (310). One end of the crushing shroud (300) is connected to and fixed with a plurality of nozzles (320) that are all connected to the arc-shaped chamber (310). The outside of the crushing shroud (300) is fixed with a water inlet pipe (330) that is connected to the arc-shaped chamber (310).

5. The crushing mechanism of the punching and scraping coal mining machine according to claim 1, characterized in that, The interceptor (400) also includes a motor (450) embedded and fixed to the support (110), and the output end of the motor (450) is fixedly connected to the crossbeam (410).

6. The crushing mechanism of the punching and scraping coal mining machine according to claim 1, characterized in that, Multiple conical blocks (220) are evenly fixed on the inner side of the protective plate (200), and a rectangular cavity communicating with the mesh (210) is opened inside the protective plate (200).

7. The crushing mechanism of the punching and scraping coal mining machine according to claim 6, characterized in that, A suction tube (230) is fixed to the outside of the protective plate (200), and the suction tube (230) is connected to the rectangular chamber.

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