CN110761788A

CN110761788A - Coal mining machine for fully mechanized mining face of extra-thick coal seam

Info

Publication number: CN110761788A
Application number: CN201911062264.9A
Authority: CN
Inventors: 宋相坤; 张晓永; 贠瑞光; 史春祥; 周常飞; 胡俊; 张斌; 朱信平; 刘凯; 王广; 李辉; 郭岱
Original assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; Tiandi Science and Technology Co Ltd Shanghai Branch
Current assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; Tiandi Science and Technology Co Ltd Shanghai Branch
Priority date: 2019-11-02
Filing date: 2019-11-02
Publication date: 2020-02-07

Abstract

The invention relates to a coal mining machine for a fully mechanized mining face of an extra-thick coal seam, which comprises an electric cabinet, a left traction part, a right traction part, a left cutting part, a right cutting part, a left roller, a right roller, a left support leg, a right support leg, a left walking box and a right walking box, wherein the left traction part and the right traction part are fixed on the left side and the right side of the electric cabinet to form a machine body, a traction shell of the traction part is of a high-strength plate all-welded structure, the support legs are of a welded structure, the traction part and the electric cabinet are in left-right butt joint, are simultaneously in pin hole fit with a plurality of large round cake pins, the traction part and the electric cabinet are fastened in a distributed manner by a plurality of long screw rods and a short screw rod, the cutting part. The invention can realize the full-height mining of the extra-thick coal seam at one time, has good whole machine stability, moderate weight and good economical efficiency, and is suitable for the traditional mining process.

Description

Coal mining machine for fully mechanized mining face of extra-thick coal seam

Technical Field

The invention relates to a super-thick coal seam coal mining machine, and belongs to the technical field of coal mining equipment.

Background

With the development of mine equipment technology, coal mining machines are developing towards large mining and high power. The installed power of the coal mining machine reaches about 3000kW at home and abroad, and the mining height reaches 7 m. The reserves of the super-thick coal seams of more than 7m in China are huge, the reserves of the super-thick coal seams in Shanmeng areas are particularly rich, the mining problems of the super-thick coal seams of 7-9 m are gradually promoted, and the annual output requirement reaches 10Mt to 15 Mt. Because the layered mining efficiency is low and the caving coal mining is easy to cause resource waste, the one-time mining full height of the ultra-thick coal seam becomes the best scheme, and the one-time mining full height scheme has the advantages of high production efficiency, high resource recovery rate, convenience in maintenance and management and the like.

At present, the fully mechanized mining working face of a 9m ultra-thick coal seam is full-high at one time, and is prone to a multi-roller form.

The Chinese patent application with the application number of 201610575811.3 discloses a three-drum coal cutter for an extra-thick coal seam and a cutting method thereof, wherein three drums are used for cutting the upper layer, the middle layer and the lower layer of a coal wall simultaneously and respectively, specifically, a front cutting part of the coal cutter cuts middle-layer coal, a middle cutting part cuts upper-layer coal, a rear cutting part cuts lower-layer coal and charges coal, so that the cutting load is dispersed, the purposes of reducing the cutting power of the coal cutter and reducing the cutting load of a single rocker arm are achieved, and feasible cutting equipment and method for mining the extra-thick coal seam with the height of more than 8m at one time are provided. The disadvantage is that the height of the machine body is too large, which is suitable for the lowest coal bed; the coal mining machine has various parts, poor interchangeability and poor economy; meanwhile, as the three rocker arms and the roller are arranged on the coal wall side, the gravity center of the whole machine is high and deviates to the coal wall side, so that the stability of the whole machine is poor.

The application number 201210033401.8 discloses a superposed-arm three-roller large-mining-height coal mining machine, which is characterized in that a heading machine type cutting part is superposed in the middle of a machine body of a double-roller coal mining machine, and the cutting of an upper coal bed is completed by adjusting the lifting and horizontal swinging of the machine body through a hydraulic cylinder and a rotary table. The mining process is extremely complex, and the efficiency of the heading machine type cutting mode and the efficiency of the coal mining machine cutting mode are difficult to match, so that the production efficiency is low, and the mining method is difficult to adapt to mining of an extra-thick coal seam.

The application number 201410319059.7 discloses a three-drum coal mining machine and a mining method suitable for a coal seam with the thickness of 7-10 m, the three-drum coal mining machine is adopted for mining, two end parts of the coal mining machine are connected with a small-diameter drum through long rocker arms to mainly cut upper and lower coal seams, a middle part of the coal mining machine is connected with a large-diameter drum through a middle short rocker arm to cut a middle coal seam, and a feasible mining method is provided for the coal seam with the thickness of 7-10 m. However, this solution also has several problems: firstly because the middle part is short rocking arm major diameter cylinder, both ends rocking arm overlength, if want to exploit the thick coal seam more than 9m, the rocking arm length at both ends needs about 6m at least, and the rocking arm overlength can lead to the atress of rocking arm huge, poor stability, matching nature poor, appears easily and interferes the scheduling problem with the support back timber. Meanwhile, the overlong rocker arm increases the distance of beveling feed, reduces the production efficiency and is a great test for the walking part. Secondly, the middle part of the machine body is added with a short rocker arm and a large-diameter roller, so that the load of the machine body is increased, and the effective traction capacity of the whole machine is reduced. Thirdly, a large amount of coal blocks cut by the middle roller can not be loaded into the chute and can be accumulated on the machine body, thereby causing extrusion, chute drift and the like to the coal mining machine.

The chinese patent application No. 201520306479.1 discloses a four-drum shearer, in which the lower coal drums are arranged in a vertical direction at a high level and cut coal simultaneously, and the upper coal drum determines one of the coal drums to work according to the traveling direction of the shearer, and essentially, three coal drums work simultaneously. The coal mining machine has the disadvantages that the weight of the whole machine is greatly increased, a rocker arm is added compared with the coal mining machine disclosed in the patent application with the application number of 201410319059.7, the weight of the whole machine is greatly increased, the traction performance of the coal mining machine is poorer, the gravity center of the whole machine is seriously deviated to the coal wall side, the stability of the whole machine is poor, and the traction traveling system is easily damaged; in addition, the scheme of four coal mining rollers is adopted, the whole machine is difficult to develop in a serialization way, the economy of the whole machine is low, and the adaptation of the coal seam thickness is poor.

Disclosure of Invention

The invention aims to provide a coal mining machine for a fully mechanized mining face of an extra-thick coal seam, which not only can realize the full mining height of the extra-thick coal seam at one time, but also has the characteristics of good stability of the whole machine, moderate weight of the whole machine, no increase of difficulty of a mining process and the like.

The main technical scheme of the invention is as follows:

the coal mining machine comprises an electric cabinet, a left traction part, a right traction part, a left cutting part, a right cutting part, a left roller, a right roller, a left support leg, a right support leg, a left walking box, a right walking box, a left traction part, a right traction part and a left walking box, wherein the left traction part and the right traction part are fixed on the left side and the right side of the electric cabinet, the left traction part and the right traction part form a main part of a machine body, the left traction part and the right traction part are respectively and fixedly supported on the left support leg and the right support leg, the left cutting part and the right cutting part are respectively and respectively supported and connected on the left traction part and the right traction part through a heightening oil cylinder, the corresponding cutting part, heightening oil cylinder and traction part form a guide rod mechanism, the free ends of the left cutting part and the right cutting part are respectively and fixedly connected with the left walking box and the right walking box, the traction part.

The cutting part comprises a transition frame and a rocker arm, the transition frame is longitudinally butted with the rocker arm and is detachably and fixedly connected with the rocker arm, and the transition frame and the rocker arm are simultaneously matched with a group of pins through pin holes on a butting face to realize transverse positioning.

The traction part and the electric cabinet are in butt joint left and right, the joint parts are simultaneously in pin hole fit with the large cake pins, the left traction part and the right traction part are in distributed fastening through left and right penetrating through the multiple groups of long screws, and the electric cabinet is in distributed fastening through the multiple groups of short screws at the joint parts of the left traction part and the right traction part.

One end of a cylinder barrel of the heightening oil cylinder is hinged to the top of the corresponding traction part close to the coal wall side, and a cylinder rod of the heightening oil cylinder is hinged to the corresponding cutting part.

The top of the traction shell below the swing position of the heightening oil cylinder is provided with a coal piling prevention structure, the coal piling prevention structure is an inclined plane positioned at the top of the traction shell, and the inclined plane is lower at the part closer to the coal wall side.

The bottom of the traction shell is close to the outer surface of the coal wall side and is provided with a plurality of rectangular groove structures with side walls on four sides, and the tops of the supporting legs are upwards embedded into the rectangular grooves in a shape following mode and are fixedly connected with the corresponding traction shell through transverse pin shafts.

The right traction part is preferably provided with a top plate, a bottom plate, a left side plate, a first rocker connecting plate, a second rocker connecting plate, a third rocker connecting plate, a fourth rocker connecting plate and a plurality of right side plates, the first rocker connecting plate and the fourth rocker connecting plate are respectively used as a rear side plate, a front side plate, the bottom plate and the left side plate to be fixedly connected, the first rocker connecting plate, the second rocker connecting plate, the fourth rocker connecting plate and the left side plate are sequentially arranged and arranged at intervals in parallel, the top plate and the bottom plate at each interval are connected in a sealing mode through the right side plate, the first rocker connecting plate, the second rocker connecting plate, the fourth rocker connecting plate and the right side plate overhang respectively exceed the right side plate, the right overhang portion forms a mounting seat of a right cutting part, two upward overhanging oil cylinder connecting plates parallel to the front side plate are fixed on the left front portion of the top plate, an oil cylinder connecting seat of a heightening oil cylinder corresponding to the right cutting part is formed, and the upper edge and lower edge of The opening is arranged in the slot which is arranged at the right edge and extends left and right, and the traction shell structures of the left traction part and the right traction part are symmetrical left and right.

The lower parts of the two oil cylinder connecting plates are vertically inserted into a distance below the top plate and are welded together through a rib plate, the oil cylinder connecting plates are welded and fixed with the top plate, and the lower parts, close to the front side, of the oil cylinder connecting plates are attached to and welded with the fourth rocker arm connecting plate.

The electric cabinet extends leftwards and rightwards, a wiring cavity and an electric element component installation cavity are arranged in the electric cabinet, the wiring cavity is located above the electric element component installation cavity and close to the coal wall side, the outline of the cross section of the electric cabinet is L-shaped, and a main cable of the coal mining machine is arranged at a gap of an L-shaped structure outside the electric cabinet.

The gear transmission system of the walking box adopts a large-modulus tooth surface carburized gear, the modulus is more than or equal to 30, and the guide sliding shoe of the walking box is externally coated on the outer side of the lower part of the shell of the walking box.

The invention has the beneficial effects that:

according to the invention, through weight reduction optimization measures such as structure optimization and size control, for example, the traction shell adopts an all-welded structure, the weight of the cutting part is controlled within 28t-34t, and the weight of the roller is controlled within 17 t; the supporting legs adopt welding parts; the electric cabinet is of an L-shaped structure, cables, water pipes and oil pipes of the coal mining machine are arranged along the top of the machine body, the length size of three sections of the machine body is controlled within 9400mm, the weight of the machine body is greatly reduced, the weight of the whole machine is controlled within 200 t-230 t, the mining height is greatly increased, meanwhile, the weight of the whole machine cannot be greatly increased along with the weight of the coal mining machine, the weight of the whole machine is lighter than that of an existing multi-drum coal mining machine for an extra-thick coal seam, and the weight traction ratio of the.

Compared with the existing multi-roller or multi-rocker coal mining machine, the invention has the advantages that the number of the rockers is reduced, the weight of the cutting part is limited in a relatively low value and small range, the gravity center of the cutting part is more deviated to the old pond side, the stability of the whole machine is greatly improved, and the stability and the reliability of the coal mining machine during working are improved.

According to the invention, through a series of structural optimization designs, for example, the capacity of the machine body for bearing the coal cutting reaction force of the roller is improved by adopting a distributed fastening mode of combining long and short screws besides using large cake pins to prevent shearing between three sections of the machine body; the traction shell is manufactured in a high-strength plate all-welding mode, so that the weight is reduced, the traction-weight ratio is improved, and the inevitable casting defect caused by the complex structure of the traction shell is avoided; the heightening oil cylinder is arranged at the top of the traction shell and close to the coal wall side, and compared with other positions arranged at the top of the traction shell, the cutting counter force borne by the cutting part and the counter force from the heightening oil cylinder are closer in the direction vertical to the coal wall, so that the twisting moment borne by the cutting part is smaller, and the twisting trend of the cutting part can be better inhibited; the coal piling prevention structure is arranged, so that the phenomenon that coal blocks are piled up between the traction part and the heightening oil cylinder when the heightening oil cylinder swings to cause the cylinder rod to be extruded and bent or even broken and the like is avoided, and the reliability and the working stability of three sections of the machine body, easily damaged parts and even the whole coal mining machine are greatly improved; the walking box adopts a large-modulus tooth surface carburized gear, so that the traction bearing capacity of the coal mining machine is increased.

The invention still keeps the overall scheme of the coal mining machine with double large rollers and double long cutting parts, the mining side can continue to adopt the traditional and mature fully mechanized mining face mining process, the coal loading effect is not influenced, the high-yield and high-efficiency requirements of the mining side with the annual output of more than 10Mt are met, the serialized popularization of the coal mining machine is facilitated, and the adaptability is strong. In addition, for purchasing of mine parties, when the coal mining machine finishes one working face and is changed to the working face with other coal seam thicknesses, the coal mining machine is still applicable, so that the coal mining machine has the optimal economy, part interchangeability and adaptability.

Drawings

Fig. 1-1 is a schematic structural view of an embodiment of the present invention.

Fig. 1-2 is a top view of fig. 1-1.

Fig. 2 is a schematic structural view of one embodiment of the left cutting part of the present invention.

Fig. 3 is a schematic view of the coal piling prevention structure of the present invention.

Fig. 4 is a schematic structural view of one embodiment of the rectangular groove of the bottom surface of the traction portion according to the present invention.

FIG. 5 is a schematic view of one embodiment of the present invention traction housing and support leg connection;

FIG. 6 is a schematic top view of the right traction housing;

fig. 7 is a schematic view of a connection structure of the cylinder connection plate.

Fig. 8 is a schematic cross-sectional profile of the electric cabinet.

Fig. 9 is a schematic structural view of one embodiment of the walking box.

Description of the drawings:

1. a left drum; 2. a left cutting part; 3. a left traction part; 4. an electric cabinet; 5. a right traction portion; 6. a right cutting part; 7. a right drum; 8. heightening the oil cylinder; 81. a cylinder barrel; 82. a cylinder rod; 9. a walking box; 10. supporting legs; 11. a pin shaft;

21. a boom; 22. a transition frame; 2-1. an electric motor; 2-2. nine groups of straight gears; 2-3, a two-stage planetary mechanism;

51. a top plate; 52. a first rocker arm connecting plate; 53. a second rocker arm connecting plate; 54. a third rocker arm connecting plate; 55. a fourth rocker arm connecting plate; 56. a right side plate; 57. an oil cylinder connecting plate; 58. a rib plate;

91. a gear; 92. a walking box housing; 93. a guide shoe; 94. a running wheel axle;

A. a bevel; B. a rectangular groove.

Detailed Description

The invention discloses a coal mining machine (which can be called coal mining machine for short) for a fully mechanized mining face of an extra-thick coal seam, which comprises an electric cabinet 4, a left traction part 3, a right traction part 5, a left cutting part 2, a right cutting part 6, a left roller 1, a right roller 7, a left supporting leg 10, a right supporting leg 10 and a left walking box 9, as shown in figures 1-1 and 1-2. The left traction part and the right traction part are fixed on the left side and the right side of the electric cabinet, and the three parts form the main part of the machine body, namely the three sections of the machine body. The left traction part and the right traction part are respectively and fixedly supported on the left support leg and the right support leg. The left cutting part and the right cutting part are respectively supported and connected on the left traction part and the right traction part through a heightening oil cylinder 8, the corresponding cutting part, the heightening oil cylinder and the traction part form a guide rod mechanism, and the cutting part can swing under the telescopic driving of the corresponding heightening oil cylinder. The free ends of the left cutting part and the right cutting part are respectively provided with a left roller and a right roller. The left and right cutting parts are responsible for outputting power and cutting and charging coal through corresponding rollers. The old pond sides of the left traction part and the right traction part are respectively fixed with the left walking box and the right walking box and are supported on the corresponding walking boxes. The traction part comprises a traction shell and a gear transmission system positioned in the traction shell, and the traction shell is of a high-strength plate all-welded structure. The gear transmission system can adopt a speed reduction transmission mechanism of a two-stage straight gear and a two-stage planetary mechanism.

The traction shell is of a high-strength plate all-welded structure, so that firstly, the total weight of the traction part is obviously reduced, the weight of the traction part is reduced by about 2t compared with that of a traditional casting, the requirement of weight reduction of the whole machine of the ultra-thick coal seam coal mining machine is met, the traction weight ratio of the whole machine is improved, secondly, the wood mold cost in the casting process is reduced by completely replacing all casting forms in the traditional traction shell, the production period is shortened, the quality defects of casting cracks, sand holes and the like caused by the structural complexity of the traction shell are thoroughly avoided, and the quality reliability is improved.

The gear transmission system in the traction shell is arranged closer to the old pond side as much as possible, so that the center of gravity of the coal mining machine can be shifted to the old pond side, and the stability of the whole coal mining machine is improved.

As shown in FIG. 2, the left cutting part and the right cutting part are bilaterally symmetrical and respectively comprise a transition frame 22 and a rocker arm 21, the transition frame and the rocker arm are longitudinally butted along the length direction, and the transition frame and the rocker arm are detachably and fixedly connected. The transition frame and the rocker arm are simultaneously matched with a group of pins through pin holes, and the group of pins vertically penetrate through the combined surface of the transition frame and the rocker arm to realize transverse positioning. The pin may be a cylindrical pin. The detachable fixed connection between the transition frame and the rocker arm can be realized through a screw rod. The rocker arm housing and the transition frame are preferably cast. The same set of coal mining machine can be matched with a plurality of pairs of transition frames with different lengths, and the length of the cutting part is changed by replacing and installing the transition frames with different lengths, so that different mining height requirements are met, the adaptability of the coal mining machine is improved, and the rocker arm is kept unchanged. The left cutting part and the right cutting part can be interchanged except the transition frame.

The rocker arm can be internally provided with a motor 2-1, nine groups of straight gears 2-2 and two-stage planetary mechanisms 2-3 which are connected in sequence, and the output ends of the two-stage planetary mechanisms 2-3 are coaxially connected with corresponding rollers. The motor drives nine groups of straight gears and two-stage planetary mechanisms to reduce speed and output power to drive the roller to work.

The traction part is in left-right butt joint with the electric cabinet, the left traction shell, the electric cabinet and the right traction shell form three sections of a machine body of the coal mining machine, and the total length of the three sections of the machine body is in the range of 9400mm in the embodiment. The combination of the traction shell and the electric cabinet is matched with a plurality of large cake pins through pin holes to prevent shearing, in addition, the three sections of the machine body penetrate through a plurality of groups of long screw rods to be fastened in a distributed manner, and the electric cabinet and the two-two combination of the left traction part and the right traction part adopt a plurality of groups of short screw rods to be fastened in a distributed manner, so that the connection strength of the three sections of the machine body and the capability of bearing complex load impact during cutting of the roller are improved. In the embodiment, the three sections of the machine body are connected and fastened together by adopting 6 groups of long screws M80 and a plurality of groups of short screws M36 so as to bear the coal cutting reaction force of the roller. The 6 groups of M80 long screws adopt a 2-2-1-1 long screw layout structure, namely two groups of long screws are arranged on the old pond side and the coal wall side of the lower part of the three sections of the machine body respectively, one group of long screws are arranged on the old pond side and the coal wall side of the top of the three sections of the machine body respectively, and a plurality of groups of M36 short screws are distributed on the periphery of the combination surface of the traction box and the electric cabinet.

According to measurement and experiments, the length of the cutting part is preferably controlled within the range of 4000-4500 mm, the weight is controlled within the range of 28-34 t, the cutting power is controlled within the range of 1100-1250 kW, the length of a rocker arm is ensured, the requirement of the whole machine mining height scheme is met, the maximum mining height can reach 9m, the total weight of the coal mining machine is indirectly controlled, the gravity center of the coal mining machine is favorably deviated to the old pond side, and the power output rotating speed and the torque are also met.

In addition, the diameter of the roller is preferably controlled within 3500-4500mm, the weight of the roller is controlled within 17t, and the height of the machine body is preferably controlled within 3800-4200 mm. The diameter of the roller, the height of the machine body and the length of the cutting part are adjusted comprehensively to adapt to different mining heights, so that interchangeability of a large number of parts is guaranteed, and the requirement of one-time mining total height of ultra-thick coal seams with different thicknesses is met.

The heightening oil cylinder 8 is preferably installed at the top of the corresponding traction part and close to the side of the coal wall. The cutting part can be lifted by controlling the extension and retraction of the height-adjusting oil cylinder, and different mining height requirements are met. One end of a cylinder barrel 81 of the heightening oil cylinder is hinged to an oil cylinder connecting seat which corresponds to the top of the traction part and is close to the coal wall side, and a cylinder rod 82 of the heightening oil cylinder is hinged to a corresponding cutting part and can be hinged to a transition frame of the cutting part. When the coal mining machine works, the stress of the large cavity of the oil cylinder is increased, the pressure of a hydraulic system is reduced, and the reliability of the balance valve is improved.

As shown in fig. 3, the top of the traction housing below the swing position of the heightening cylinder 8 is preferably provided with a coal piling prevention structure, wherein the coal piling prevention structure is an inclined plane a at the top of the traction housing, and the inclined plane is lower at a part closer to the coal wall side. When coal powder or coal blocks generated by the coal mining machine in the working process fall below the heightening oil cylinder, the coal powder or the coal blocks can automatically slide down the machine body under the guidance of the inclined plane, so that the cylinder rod of the heightening oil cylinder is prevented from being extruded and bent or even broken due to being clamped by piled coal when the heightening oil cylinder swings downwards.

The outer surface of the bottom of the traction shell is arranged into an incompletely closed frame structure, and the side close to the coal wall is represented as a rectangular groove structure B with a plurality of four sides provided with side walls, as shown in figures 4 and 5, the outer surface of the bottom of the traction shell is provided with a left part and a right part. The top of the supporting leg is upwards embedded into each rectangular groove along with the shape, the supporting leg is transversely penetrated through the pin shaft 11 to be fixedly connected with the corresponding traction casing, the side face of the top of the supporting leg is attached to the side wall of each rectangular groove, positioning support is achieved, and the stress effect is good. The pin shafts 11 correspond to the rectangular grooves one by one. The connection structure between the support leg and the traction shell can realize higher connection reliability. The supporting legs are preferably of a welded structure, so that the weight is reduced, the production efficiency is improved, the production time is shortened, and the cost of the wood formwork is saved.

Regarding the all-welded structure of the high-strength plate of the traction housing, taking the traction housing of the right traction part as an example, as shown in fig. 6 and 7, the all-welded structure is provided with a top plate 51, a bottom plate, a left side plate, a first rocker connecting plate 52, a second rocker connecting plate 53, a third rocker connecting plate 54, a fourth rocker connecting plate 55 and a plurality of right side plates 56, wherein the first rocker connecting plate and the fourth rocker connecting plate respectively serve as a rear side plate and a front side plate to be fixedly connected with the top plate, the bottom plate and the left side plate, the first rocker connecting plate to the fourth rocker connecting plate are sequentially arranged and parallelly arranged at intervals, the top plate and the bottom plate at each interval are hermetically connected through one right side plate, the first rocker connecting plate to the fourth rocker connecting plate are cantilevered rightward beyond the right side plate, the rightward overhanging part forms a mounting seat of the right cutting part, and the plate surface of. Two oil cylinder connecting plates 57 which are parallel to the front side plate and extend upwards are fixed at the left front part of the top plate to form an oil cylinder connecting seat of the heightening oil cylinder corresponding to the right cutting part, and pin shaft holes are formed in the oil cylinder connecting plates. The upper and lower edges of part or all of the first, second, third and fourth rocker connecting plates are respectively and correspondingly embedded into slots which are arranged on the top plate and the bottom plate and provided with openings at the right edge and extend left and right. The traction shell structures of the left traction part and the right traction part are bilaterally symmetrical.

The first rocker connecting plate to the fourth rocker connecting plate are frameworks of the traction shell, play a main supporting role for the traction shell, and can obviously improve the rigidity of the traction shell. The boards are spliced through the slots to form a crossed framework structure, so that the structural strength and the reliability of the traction shell are obviously improved.

The lower parts of the two oil cylinder connecting plates are vertically inserted to a distance below the top plate and are welded and connected together through a rib plate 58 to form a root-tying design, so that the welding reliability and the stability of the oil cylinder connecting plates can be obviously improved. The oil cylinder connecting plate is welded and fixed with the top plate, and the lower portion, close to the front side, of the oil cylinder connecting plate 57 is attached to and welded with the fourth rocker arm connecting plate 55, so that on one hand, the welding strength is improved, and on the other hand, the oil cylinder connecting plate and the fourth rocker arm connecting plate are mutually supported.

The electric cabinet extends leftwards and rightwards, a wiring cavity and an electrical component installation cavity are arranged in the electric cabinet, the wiring cavity is located above the electrical component installation cavity and close to the coal wall side, the outline of the cross section of the electric cabinet is L-shaped, and as shown in figure 8, a main cable of the coal mining machine is arranged at a gap of an L-shaped structure outside the electric cabinet, namely the old pond side of the wiring cavity. By adjusting the spatial layout of the related chambers, the left and right lengths of the electric cabinet can be shortened, and the weight of the electric cabinet is reduced. The coal cutter cable, the water pipe and the oil pipe can be arranged and connected to all parts along the top of the machine body, so that a wire passing cavity in the traction box is reduced, and the total size of the traction box is shortened. The sizes of the traction box and the electric cabinet are comprehensively controlled, so that the total length of three sections of the machine body is in the range of 9400 mm.

As shown in fig. 9, the traveling box comprises a traveling box shell 92, a gear transmission system, a guide slipper 93, a traveling wheel assembly and a traveling wheel shaft 94, wherein the gear transmission system adopts a large-module tooth surface carburizing gear 91, and the gear module is not less than 30, so that the traction force of the ultra-thick coal seam mining machine is improved, and the traction-weight ratio is improved. Meanwhile, the guide shoes 93 are externally mounted on the lower portion of the traveling box housing 92, that is, the front and rear ears of the guide shoes are located outside the traveling box housing.

The invention is matched with a large underground scraper conveyor and a hydraulic support with extra large mining height, and can realize the integration and automation of mining, falling, loading, transporting, supporting and controlling of a working face for mining an extra-thick coal seam with the full height of 9m at one time.

The invention provides a technical scheme and related technical parameters of a coal mining machine for a fully mechanized mining working face of a 9m thick coal seam with double large rollers, double long cutting parts, a high machine body and an overhead heightening oil cylinder, which is used for realizing the purpose that the fully mechanized mining working face of the super thick coal seam with the full height of 9m can be mined by the double rollers at one time, the whole machine is reliably connected and has moderate weight, the weight of the cutting parts and the rollers is controlled by a light weight design, the gravity center position of the whole machine is more deviated to the old pond side, the stability is greatly increased, and the coal loading effect of the coal mining machine is not influenced. For an ore side, the types of parts of the whole machine are few, the adaptability of mining working faces with different coal seam thicknesses is greatly improved, the interchangeability of parts of a coal mining machine is facilitated, the economy of the whole machine is good, and the high-yield and high-efficiency mining of the working faces is facilitated by adopting a mature fully-mechanized mining working face mining process.

Claims

1. The utility model provides a super thick coal seam is combined and is adopted working face coal-winning machine, including the electric cabinet, control two traction parts, control two cutting units, control two cylinders, control two supporting legs and control two walking casees, control two traction parts and fix the left and right sides at the electric cabinet, the main part of fuselage is constituteed to the three, control two traction parts respectively fixed stay about on two supporting legs, control two cutting units respectively through one heighten the hydro-cylinder respectively the support connection about on two traction parts, and corresponding cutting unit, heighten the hydro-cylinder and constitute guide arm mechanism with traction part, control two cutting units's free end and install respectively about two cylinders, left side traction part and right traction part's old pool side is fixed with controlling two walking casees respectively, its characterized in that: the traction part comprises a traction shell and a gear transmission system positioned in the traction shell, and the traction shell is of a high-strength plate all-welded structure.

2. The fully mechanized coal mining face of extra thick coal seam according to claim 1, characterized in that: the cutting part comprises a transition frame and a rocker arm, the transition frame is longitudinally butted with the rocker arm and is detachably and fixedly connected with the rocker arm, and the transition frame and the rocker arm are simultaneously matched with a group of pins through pin holes on a butting face to realize transverse positioning.

3. The fully mechanized coal mining face of extra thick coal seam according to claim 2, characterized in that: the traction part and the electric cabinet are in butt joint left and right, the joint parts are simultaneously in pin hole fit with the large cake pins, the left traction part and the right traction part are in distributed fastening through left and right penetrating through the multiple groups of long screws, and the electric cabinet is in distributed fastening through the multiple groups of short screws at the joint parts of the left traction part and the right traction part.

4. The fully mechanized coal mining face of extra thick coal seam according to claim 3, characterized in that: the length of the cutting part is controlled to be 4000-4500 mm, the weight is controlled to be 28-34 t, and the cutting power is controlled to be 1100kW-1250 kW.

5. The fully mechanized coal mining face of extra thick coal seam according to claim 4, characterized in that: the diameter of the roller is controlled within 3500-4500mm range, the weight of the roller is controlled within 17t, and the height of the machine body is controlled within 3800-4200mm range.

6. The fully mechanized coal mining face of extra thick coal seam according to claim 1, 2, 3, 4 or 5, characterized in that: one end of a cylinder barrel of the heightening oil cylinder is hinged to the top of the corresponding traction part close to the coal wall side, and a cylinder rod of the heightening oil cylinder is hinged to the corresponding cutting part.

7. The fully mechanized coal mining face of extra thick coal seam according to claim 6, characterized in that: the top of the traction shell below the swing position of the heightening oil cylinder is provided with a coal piling prevention structure, the coal piling prevention structure is an inclined plane positioned at the top of the traction shell, and the inclined plane is lower at the part closer to the coal wall side.

8. The fully mechanized coal mining face of extra thick coal seam according to claim 7, characterized in that: the bottom of the traction shell is close to the outer surface of the coal wall side and is provided with a rectangular groove structure with side walls on four sides, the tops of the supporting legs are upwards embedded into the rectangular grooves along with the shape and are fixedly connected with the corresponding traction shell through transverse pin shafts, and the supporting legs are of welded structures.

9. The fully mechanized coal mining face of extra thick coal seam according to claim 1, 2, 3, 4 or 5, characterized in that: the right traction part is arranged on the traction shell and is provided with a top plate, a bottom plate, a left side plate, a first rocker arm connecting plate, a second rocker arm connecting plate, a third rocker arm connecting plate, a fourth rocker arm connecting plate and a plurality of right side plates, the first rocker arm connecting plate and the fourth rocker arm connecting plate are respectively used as a rear side plate, a front side plate, the bottom plate and the left side plate which are fixedly connected, the first rocker arm connecting plate, the second rocker arm connecting plate and the fourth rocker arm connecting plate are sequentially arranged and arranged at intervals in parallel, the top plate and the bottom plate at each interval are connected in a sealing mode through one right side plate, the first rocker arm connecting plate, the second rocker arm connecting plate, the fourth rocker arm connecting plate and the right side plate overhang exceed the right side plate, the right overhang part forms a mounting seat of a right cutting part, two upward overhang oil cylinder connecting plates parallel to the front plate are fixed on the left front portion of the top plate, an oil cylinder connecting seat of a height-adjusting oil cylinder corresponding to the right cutting The opening is in the slot that the right edge just extended about, and the traction shell structure bilateral symmetry of portion is drawn about.

10. The fully mechanized coal mining face of extra thick coal seam according to claim 9, characterized in that: the lower parts of the two oil cylinder connecting plates are vertically inserted into a distance below the top plate and are welded together through a rib plate, the oil cylinder connecting plates are welded and fixed with the top plate, and the lower parts, close to the front side, of the oil cylinder connecting plates are attached to and welded with the fourth rocker arm connecting plate.

11. The fully mechanized coal mining face of extra thick coal seam according to claim 1, 2, 3, 4 or 5, characterized in that: the electric cabinet extends leftwards and rightwards, a wiring cavity and an electric element component installation cavity are arranged in the electric cabinet, the wiring cavity is located above the electric element component installation cavity and close to the coal wall side, the outline of the cross section of the electric cabinet is L-shaped, and a main cable of the coal mining machine is arranged at a gap of an L-shaped structure outside the electric cabinet.

12. The fully mechanized coal mining face of extra thick coal seam according to claim 1, 2, 3, 4 or 5, characterized in that: the gear transmission system of the walking box adopts a large-modulus tooth surface carburized gear, the modulus is more than or equal to 30, and the guide sliding shoe of the walking box is externally coated on the lower part of the shell of the walking box.