Coal mining machine
By installing impact components on the rocker arm of the coal miner and using the hydraulic system to transmit impact energy to crack the rock layer, the problem of excessive cutting resistance of the thin coal seam coal miner and overload of the cutting motor is solved, and efficient coal seam and rock layer mining is achieved, reducing the failure rate and improving operating efficiency.
Patent Information
- Application Number
- CN202421444777.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-02-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the mining of thin coal seams of Jinggong Coal Mine, the height of the fuselage of the coal mine is limited, resulting in limited power of the rocker arm and traction motor, and excessive cutting resistance of the roller, resulting in overload of the cutting motor, over-temperature burn failure and shutdown, affecting the normal production of the coal mining working surface.
The impact assembly is installed on the rocker arm of the coal miner, including the impact head and the impact rod. The piston rod is driven by the hydraulic system to impact the impact rod, transmit the impact energy to the rock layer, crack the rock layer, expose the coal seam, and then the coal mining is carried out by the cut-off teeth on the roller.
It effectively improves the ability of the thin coal seam roller coal miner to cut rock mass, realizes the mining process of coal seam and top-bottom slate rock layer, ensures the overload of the cutting motor, reduces the failure rate of the coal miner, and improves operating efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of coal mining by coal mining machines, and in particular relates to a coal mining machine. Background Art
[0002] The drum coal shearer is composed of a machine body, a traction part, a supporting slipper, a guide slipper, a rocker arm, a height adjustment cylinder, a drum, a hydraulic system, an electronic control system, etc. The rocker arm is connected to the machine body through a hinge pin. The height adjustment cylinder connecting the machine body and the rocker arm controls the pitch of the rocker arm and adjusts the coal cutting height of the coal shearer. The rocker arm is composed of a cutting motor, a gear transmission system and a drum to realize the coal cutting function of the coal shearer. The traction part fixed on the machine body is composed of a traction motor, a gear transmission system and a traction sprocket. The supporting slipper and the guide slipper on the machine body support the coal shearer on the middle groove of the scraper conveyor. The traction sprocket of the traction part of the coal shearer engages with the middle groove pin row to realize the reciprocating motion of the coal shearer on the middle groove to cut coal.
[0003] At present, there are problems in the mining of thin coal seams in underground coal mines: due to the limitation of coal seam mining height, the height of the coal mining machine is limited, and the power of the coal mining machine rocker arm and traction motor is limited. Since the drum coal mining machine for thin coal seam mining not only cuts coal, but also cuts the top and bottom rock mass to maintain the support height of the hydraulic support matched with the coal mining machine, the cutting resistance of the rock mass is greater than that of the coal mass, which makes the cutting resistance of the coal mining machine drum too large, causing the cutting motor to be in an overloaded state, resulting in the actual power of the cutting motor exceeding the rated power of the matching motor, resulting in over-temperature burnout failure and shutdown, which seriously affects the normal production of the coal mining face. Utility Model Content
[0004] In order to solve the above-mentioned problem in the prior art, that is, the cutting resistance of the coal mining machine drum is too large, so that the cutting motor is in an overload state, the utility model provides a coal mining machine.
[0005] The present application provides a coal mining machine, which adopts the following technical solution:
[0006] A coal mining machine comprises a machine body and a rocker arm hinged to the machine body; the rocker arm comprises an arm body and a roller mounted on the arm body; the roller is controlled to rotate on the arm body by a cutting motor; and a cutting tooth is mounted on the roller;
[0007] An impact assembly is also installed on the arm body, and the impact assembly includes an impact head. The impact head includes a cylinder body and an impact rod installed on the cylinder body. One end of the impact rod passes through the cylinder body, and the impact rod impacts the top and bottom plate rock layers through vibration.
[0008] By adopting the above technical solution, the fuselage lifts the rocker arm so that the rocker arm does not affect the movement of the fuselage, and then moves the fuselage to the designated position, and lowers the rocker arm so that the impact assembly on the rocker arm contacts the rock formation first. When the impact head of the impact assembly contacts the rock formation, the impact rod is impacted. After the impact rod is impacted, the impact rod transmits the impact to the rock formation, and the rock formation is cracked. And as the rocker arm descends, the impact rod continuously impacts the rock formation, exposing the coal seam under the rock formation, and the drum rotates, and the pick on the drum passes through the rock formation and contacts the coal seam to mine the coal seam. By arranging the impact assembly on the rocker arm, the ability of the thin coal seam drum coal mining machine to cut rock mass can be effectively improved, so that the thin coal seam coal mining machine can realize the mining process of cutting coal seams and top and bottom plate rock formations. When mining coal seams and top and bottom plate rock formations, the thin coal seam drum coal mining machine can ensure that the cutting motor is not overloaded, reduce the failure rate of the coal mining machine, and improve the operating efficiency of the thin coal seam drum coal mining machine.
[0009] Preferably, the arrangement height of the end of the impact rod is lower than the arrangement height of the lowest pick on the drum.
[0010] By adopting the above technical solution, when the rocker arm descends, the impact assembly first contacts the top and bottom plate rocks.
[0011] Preferably, a telescopic hole is provided in the cylinder body, and the other end of the impact rod is inserted into the telescopic hole and fixedly connected to the telescopic hole wall;
[0012] A piston rod is inserted into the telescopic hole and reciprocates along the depth direction of the telescopic hole to impact the end of the impact rod.
[0013] By adopting the above technical solution, the piston rod continuously impacts the impact rod when it moves back and forth.
[0014] Preferably, a reversing valve is installed on the cylinder body, and a liquid inlet hole and a liquid outlet hole connected with the reversing valve are opened on the cylinder body.
[0015] By adopting the above technical solution, the pressurized oil provided by the hydraulic pump station outside the impact head passes through the liquid inlet hole of the cylinder body, drives the piston rod to impact through the reversing valve and the cylinder oil circuit, and returns to the hydraulic pump station tank from the liquid outlet through the reversing valve, forming a hydraulic impact oil circuit, impacting the impact rod, and transmitting the impact energy to the rock mass through the impact rod.
[0016] Preferably, a nitrogen chamber and an accumulator are installed on the cylinder body, and the reversing valve, the nitrogen chamber and the accumulator are connected through pipelines of the cylinder body.
[0017] By adopting the above technical solution, the nitrogen chamber and the accumulator store the hydraulic oil energy during the return stroke of the piston rod and release it during the piston rod stroke stage, thereby increasing the impact energy during the piston rod stroke stage.
[0018] Preferably, an oil retaining groove is provided on the hole wall of the telescopic hole, and an oil seal is installed in the oil retaining groove.
[0019] By adopting the above technical solution, the oil is prevented from contacting the impact rod.
[0020] Preferably, the impact assembly further comprises a fixing seat, the fixing seat is fixedly connected to the arm body, and the impact head is fixedly connected to the fixing seat.
[0021] By adopting the above technical solution, the installation of the impact component is facilitated.
[0022] Preferably, a plurality of impact heads are provided.
[0023] By adopting the above technical solution, it is possible to impact the top and bottom rock layers in a larger range.
[0024] Preferably, a plurality of the impact heads are arranged side by side on the fixing seat.
[0025] Preferably, an articulated pin is installed between the fuselage and the rocker arm, and a height-adjusting cylinder is installed on the fuselage. The height-adjusting cylinder is arranged on the lower side of the articulated pin, the telescopic rod of the height-adjusting cylinder is hinged to the rocker arm, and the cylinder body of the height-adjusting cylinder is hinged to the fuselage.
[0026] Beneficial effects of the utility model:
[0027] (1) By arranging an impact assembly on the rocker arm, the ability of the thin coal seam drum shearer to cut rock mass can be effectively improved, so that the thin coal seam shearer can realize the mining process of cutting coal seams and top and bottom rock layers;
[0028] (2) When mining coal seams and roof and floor rock layers, the thin coal seam drum shearer can ensure that the cutting motor is not overloaded, reduce the failure rate of the shearer, and improve the operating efficiency of the thin coal seam drum shearer. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0030] Figure 1 Schematic diagram of the coal mining machine in this embodiment;
[0031] Figure 2 It is a schematic diagram of an impact assembly provided on the rocker arm in this embodiment;
[0032] Figure 3 is a schematic diagram of the structure of the impact assembly in this embodiment;
[0033] Figure 4 Schematic diagram of the structure of the impact head in this embodiment.
[0034] Explanation of the reference numerals in the accompanying drawings: 1. body; 2. rocker arm; 21. arm body; 22. drum; 23. cutting motor; 3. hinge pin; 4. height adjustment cylinder; 5. impact assembly; 51. fixing seat; 52. impact head; 521. cylinder body; 5211. telescopic hole; 5212. liquid inlet hole; 5213. liquid outlet hole; 522. piston rod; 523. impact rod; 524. reversing valve; 525. nitrogen chamber; 526. accumulator; 527. oil retaining groove. DETAILED DESCRIPTION
[0035] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the relevant utility model are shown in the accompanying drawings.
[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0037] The utility model provides a coal mining machine, referring to Figure 1 , Figure 2 The coal mining machine includes a machine body 1 and a rocker arm 2 connected to the machine body 1.
[0038] The rocker arm 2 is mounted on the fuselage 1, and a hinge pin 3 is mounted between the fuselage 1 and the rocker arm 2, so that the fuselage 1 and the rocker arm 2 are connected together by hinge. A height adjustment cylinder 4 is mounted on the fuselage 1, and the height adjustment cylinder 4 is arranged on the lower side of the hinge pin 3. The telescopic rod of the height adjustment cylinder 4 is hinged to the rocker arm 2, and the cylinder body of the height adjustment cylinder 4 is hinged to the fuselage 1. When the telescopic rod of the height adjustment cylinder 4 pops out, it pushes the rocker arm 2, so that the rocker arm 2 rotates upward with the hinge pin 3 as the axis, thereby raising the rocker arm 2; when the telescopic rod of the height adjustment cylinder 4 is retracted, it pulls the rocker arm 2, so that the rocker arm 2 rotates downward with the hinge pin 3 as the axis.
[0039] The rocker arm 2 includes an arm body 21 and a roller 22 mounted on the arm body 21. One side of the arm body 21 is connected to the machine body 1 through a hinge pin 3, and a cutting motor 23 is installed on the arm body 21, the cutting motor 23 is fixedly connected to the arm body 21, and a gear set is installed on the cutting motor 23, and the power of the cutting motor 23 is transmitted to the roller 22 through the gear set, so that the cutting motor 23 drives the roller 22 mounted on the arm body 21 to rotate.
[0040] The drum 22 is covered on the gear set and arranged horizontally. A plurality of picks are installed on the outside of the drum 22. The number of picks is determined according to the diameter and length of the drum 22. The picks surround the drum 22. When the rocker arm 2 descends, the drum 22 descends with the rocker arm 2, so that the picks installed on the drum 22 can contact the coal seam, and when the drum 22 rotates, the picks cut each layer as the drum 22 rotates.
[0041] The impact assembly 5 is installed on the rocker arm 2, and the impact assembly 5 is installed at the front side of the drum 22. The lower side of the impact assembly 5 is arranged at a height lower than the lowest pick on the drum 22, so that when the rocker arm 2 descends, the impact assembly 5 first contacts the top and bottom plate rocks. The impact assembly 5 is arranged at the front side of the drum 22, so that when the rocker arm 2 descends, the impact assembly 5 is more likely to first contact the top and bottom plate rocks.
[0042] Reference Figure 3 , Figure 4 The impact assembly 5 includes a fixing base 51 fixedly connected to the rocker arm 2 and a plurality of impact heads 52 mounted on the fixing base 51 , and the plurality of impact heads 52 are mounted side by side.
[0043] The impact head 52 includes a cylinder body 521, a telescopic hole 5211 is formed in the cylinder body 521, one end of the telescopic hole 5211 is open, a piston rod 522 is installed in the telescopic cavity, the piston rod 522 is arranged in the telescopic hole 5211 along the depth direction of the telescopic hole 5211, and the piston rod 522 moves back and forth in the telescopic hole 5211 along the depth direction of the telescopic hole 5211. An impact rod 523 is fixedly connected to the opening of the telescopic hole 5211, one end of the impact rod 523 is inserted into the telescopic hole 5211, and the other end passes through the telescopic hole 5211.
[0044] A reversing valve 524 is installed on the cylinder body 521, and a liquid inlet hole 5212 and a liquid outlet hole 5213 connected to the reversing valve 524 are opened on the cylinder body 521. The pressure oil provided by the hydraulic pump station outside the impact head 52 passes through the liquid inlet hole 5212 of the cylinder body 521, drives the piston rod 522 to impact through the reversing valve 524 and the oil circuit of the cylinder body 521, and returns to the hydraulic pump station tank from the liquid outlet hole 5213 through the reversing valve 524, forming a hydraulic impact oil circuit, impacting the impact rod 523, and transmitting the impact energy to the rock through the impact rod 523.
[0045] A nitrogen chamber 525 and an accumulator 526 are installed on the cylinder body 521, and the reversing valve 524, the nitrogen chamber 525 and the accumulator 526 are connected through the pipeline of the cylinder body 521. The nitrogen chamber 525 and the accumulator store the energy of the hydraulic oil during the return process of the piston rod 522, and release it during the stroke stage of the piston rod 522, thereby increasing the impact energy of the piston rod 522 during the stroke stage.
[0046] An oil retaining groove 527 is opened on the hole wall of the telescopic hole 5211, and an oil seal is installed in the oil retaining groove 527. The oil retaining groove 527 is arranged around the piston rod 522, and the piston rod 522 passes through the oil seal.
[0047] When the impact head 52 is installed on the fixed seat 51, the cylinder body 521 is fixedly connected to the fixed seat 51, one end of the impact rod 523 passes through the outside of the cylinder body 521, and the arrangement height of the end of the impact rod 523 is lower than the arrangement height of the lowest cutting tooth on the drum 22.
[0048] The method of using the coal mining machine in the embodiment of the present application is as follows: the machine body 1 lifts the rocker arm 2 so that the rocker arm 2 does not affect the movement of the machine body 1, and then moves the machine body 1 to the designated position, and lowers the rocker arm 2 by raising the oil cylinder 4, so that the impact assembly 5 on the rocker arm 2 first contacts the rock formation, and when the impact head 52 of the impact assembly 5 contacts the rock formation, the piston rod 522 in the impact head 52 reciprocates up and down to impact the impact rod 523, and after the impact rod 523 is impacted, the impact rod 523 transmits the impact to the rock formation to crack the rock formation. And as the rocker arm 2 descends, the impact rod 523 continuously impacts the rock formation, exposing the coal seam under the rock formation, and the drum 22 rotates, and the pick on the drum 22 passes through the rock formation and contacts the coal seam, and the coal seam is mined. By arranging the impact assembly 5 on the rocker arm 2, the ability of the thin coal seam drum 22 coal mining machine to cut rock mass can be effectively improved, so that the thin coal seam coal mining machine can realize the mining process of cutting the coal seam and the top and bottom plate rock formations. When the thin coal seam drum 22 coal mining machine is mining coal seams and roof and floor rock layers, it can ensure that the cutting motor 23 is not overloaded, reduce the failure rate of the coal mining machine, and improve the operating efficiency of the thin coal seam drum 22 coal mining machine.
[0049] Wherein, a plurality of impact heads 52 are provided, so as to be able to impact the top and bottom rock layers in a larger range.
[0050] The term "comprise" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus / device.
[0051] So far, the technical solution of the utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without departing from the principle of the utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the utility model.
Claims
1. A coal mining machine, comprising a machine body (1) and a rocker arm (2) hinged to the machine body (1); the rocker arm (2) comprises an arm body (21) and a roller (22) mounted on the arm body (21); the roller (22) is controlled to rotate on the arm body (21) by a cutting motor (23); and a cutting tooth is mounted on the roller (22); Features: An impact assembly (5) is also installed on the arm body (21), and the impact assembly (5) includes an impact head (52), and the impact head (52) includes a cylinder body (521) and an impact rod (523) installed on the cylinder body (521), one end of the impact rod (523) passes through the cylinder body (521), and the impact rod (523) impacts the top and bottom plate rock layers through vibration.
2. A coal mining machine according to claim 1, characterized in that: The arrangement height of the end of the impact rod (523) is lower than the arrangement height of the lowest pick on the drum (22).
3. A coal mining machine according to claim 1, characterized in that: A telescopic hole (5211) is provided in the cylinder body (521), and the other end of the impact rod (523) is inserted into the telescopic hole (5211) and fixedly connected to the wall of the telescopic hole (5211); The telescopic hole (5211) is penetrated by a piston rod (522) which reciprocates along the depth direction of the telescopic hole (5211) and impacts the end of the impact rod (523).
4. A coal mining machine according to claim 3, characterized in that: The cylinder body (521) is provided with a reversing valve (524), and the cylinder body (521) is provided with a liquid inlet hole (5212) and a liquid outlet hole (5213) which are in communication with the reversing valve (524).
5. A coal mining machine according to claim 4, characterized in that: The cylinder body (521) is provided with a nitrogen chamber (525) and an accumulator (526), and the reversing valve (524), the nitrogen chamber (525) and the accumulator (526) are connected via a pipeline of the cylinder body (521).
6. A coal mining machine according to claim 4, characterized in that: An oil retaining groove (527) is provided on the hole wall of the telescopic hole (5211), and an oil seal is installed in the oil retaining groove (527).
7. A coal mining machine according to claim 1, characterized in that: The impact assembly (5) also includes a fixing seat (51), wherein the fixing seat (51) is fixedly connected to the arm body (21), and the impact head (52) is fixedly connected to the fixing seat (51).
8. A coal mining machine according to claim 7, characterized in that: A plurality of impact heads (52) are provided.
9. A coal mining machine according to claim 8, characterized in that: A plurality of impact heads (52) are arranged side by side on the fixing seat (51).
10. A coal mining machine according to claim 1, characterized in that: A hinge pin shaft (3) is installed between the machine body (1) and the rocker arm (2), and a height adjustment cylinder (4) is installed on the machine body (1). The height adjustment cylinder (4) is arranged on the lower side of the hinge pin shaft (3), the telescopic rod of the height adjustment cylinder (4) is hinged to the rocker arm (2), and the cylinder body of the height adjustment cylinder (4) is hinged to the machine body (1).