CN112249606B

CN112249606B - Waste rock blocking and collision preventing device for scraper conveyor head of fully mechanized mining face and using method

Info

Publication number: CN112249606B
Application number: CN202011218408.8A
Authority: CN
Inventors: 吴浩; 马丹; 张吉雄; 黄艳利; 张强; 周楠; 黄鹏
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-08-03
Anticipated expiration: 2040-11-04
Also published as: CN112249606A

Abstract

The invention discloses a waste rock blocking and collision preventing device for a fully mechanized mining face scraper conveyor head and a using method. The lifting system is positioned at the top, consists of an inner wire tube, a long screw rod, a circular washer, a bolt nut and a shackle and is used for adjusting the height of the device; the guide system is hinged with the lifting system and mainly consists of a mining I-steel with an end suspension groove, a middle suspension groove and a tooth groove formed in the inner part, and provides a suspension fulcrum for the arresting system below the suspension and realizes the horizontal movement of the arresting system; the arresting system comprises an anti-collision steel plate and a buffer component welded at the bottom of the anti-collision steel plate and is used for reducing or avoiding damage caused by coal gangue collision or flying out. The device simple structure, convenient operation can impel nimble the removal along with the working face, and the practicality is stronger.

Description

Waste rock blocking and collision preventing device for scraper conveyor head of fully mechanized mining face and using method

Technical Field

The invention belongs to the field of mining mechanical equipment, and particularly relates to a waste rock blocking and collision preventing device for a scraper conveyor head of a fully mechanized mining face and a using method of the waste rock blocking and collision preventing device.

Background

Coal is an industrial food grain and is mainly used for power generation, steel smelting, coal product processing, cement manufacturing and the like in the industries of electric power, steel, chemical industry and building materials. With the continuous deepening of the productivity of the structural coal and the continuous promotion of the clean utilization of the coal in China, the energy structure is further optimized. The national raw coal yield in 2019 is 38.46 hundred million tons, wherein 76.8 percent of the raw coal is from Shanxi, inner Mongolia, Shaanxi and Xinjiang areas; the total annual energy consumption amount is 48.60 hundred million tons of standard coal, the coal consumption amount is about 28.04 hundred million tons of standard coal, and the proportion of the coal in the primary energy consumption reaches 57.7 percent. Although coal has a proportional downslide in disposable energy in recent years, the coal is expected to be in a dominant position in the future of 5-10 years. According to statistics, at present, three-fourth of the coal yield in China is produced by large and medium-sized mines with the capacity of more than 120 ten thousand tons/year, a strike longwall comprehensive mechanized coal mining method is generally adopted for mining, and the working face equipment mainly comprises: coal mining machines, hydraulic supports, scraper conveyors, crushers, bridge loaders, and the like. The coal mining process flow comprises the following steps: under the support shield provided by the hydraulic support, the coal mining machine is responsible for breaking coal, the coal cut from the coal wall falls onto the scraper conveyor, is transferred onto a bridge type reversed loader (comprising a crusher), and is conveyed out of a stope through the belt conveyor.

In fact, the geological conditions of the coal seam are often complex, the coal seam not only has a certain inclination angle, but also has unstable production state, and a large number of geological structures such as faults and the like exist. As a result, shearers often need to force through faults during coal cutting or "flip" or "bed" during coal tracking. In addition, in the process of coal formation or under the influence of later geological action, gangue often exists in the coal, and a large amount of gangue is mixed into the coal flow in the process of mining. It can be seen that when the coal gangue blocks are large or hard, the coal gangue blocks can violently impact the tail of the bridge type reversed loader when the head of the scraper conveyor is dismounted, or fly out of the tail, and particularly the working surface of a coal seam with a large inclination angle is more prominent. In order to prevent the tail of the reversed loader from being damaged due to collision and prevent the personnel from being injured due to flying of coal and gangue, the invention needs to provide a gangue blocking anti-collision device. Although there are many patents such as CN102996150A, CN206766900U and CN206016840U, which disclose that special mechanical devices are installed above the hydraulic support or scraper conveyor to prevent the large pieces of coal gangue from rolling and causing impact injury to face personnel during mining of coal seams with large inclination angles, they do not have the function of preventing the large pieces of coal gangue at the head of the scraper conveyor from impacting the tail of the transfer conveyor and preventing them from flying or overflowing the tail of the transfer conveyor.

Disclosure of Invention

The technical problem solved by the invention is as follows: aiming at the lack of a device for preventing collision and protecting the tail of a bridge type loader and blocking coal and gangue from overflowing or flying out in the prior art, the waste rock blocking and preventing device for the machine head of the scraper conveyor of the fully mechanized mining face and the using method are provided, so that the collision damage to the tail of the loader caused by unloading and transferring of large blocks of coal and gangue at the machine head of the scraper conveyor can be reduced, and the personnel are prevented from being injured by the overflow or flying out of the machine tail of the coal and gangue. The device simple structure, convenient operation can impel nimble the removal along with the working face, and the practicality is stronger. The invention is realized by adopting the following technical scheme:

the waste rock blocking and collision preventing device of the scraper conveyor head of the fully mechanized mining face consists of a lifting system for adjusting the vertical height of a device, a guide system for adjusting the horizontal position of the device and a blocking system for controlling coal and waste rock flying out and colliding; the lifting system consists of 3-5 groups of lifting components, and each group of lifting components consists of an inner wire tube, a long screw, two circular washers, a shackle and a set of bolt and nut; the guide system is formed by processing I-shaped steel with a web plate provided with a suspension groove and a tooth groove; the arresting system consists of an anti-collision steel plate and a buffer component welded at the lower part of the anti-collision steel plate; the guide system is hung on a supporting structure of a top plate at the end of the haulage roadway through the lifting system, and the blocking system at the lower part is hung in a tooth groove of I-shaped steel of the guide system through a rope.

Furthermore, a circular washer is welded at one end of the inner wire pipe and one end of the long screw rod, the inner wire pipe is in threaded connection with the other end of the long screw rod, the lifting of the device in the vertical direction can be achieved by adjusting the screwing allowance of the threaded connection of the inner wire pipe and the long screw rod, and the circular washer at one end of the shackle and one end of the long screw rod are connected through bolts and nuts.

Furthermore, the suspension grooves are uniformly distributed on the I-shaped steel web plate and consist of two end suspension grooves and a middle suspension groove, and the suspension grooves are communicated with the tooth grooves and smoothly process corners.

Furthermore, the anticollision steel sheet material is high strength steel, and its upper portion corner department opens there are two circular hanging hole, the welding of buffer part is in anticollision steel sheet lower part, and buffer part inside contains 2 ~ 3 damping spring.

Preferably, the model of the inner wire tube and the long screw rod is M20-M50, the length is 30-80 cm, the inner diameter of the annular washer is 10-50 mm, the outer diameter of the annular washer is 20-60 mm, the thickness of the annular washer is 10-30 mm, the shackle is arched and has the model of 0.33T or 0.5T, and the model of the bolt and the nut is M5-M20.

Preferably, the length of the I-steel is 5-7 m, the length and height of the end suspension groove is 30-60 multiplied by 30-60 mm, the length and height of the middle suspension groove is 30-60 multiplied by 10-30 mm, the depth of the tooth groove is 20-60 mm, and the tooth angle is 8-75 degrees.

Preferably, the length, width and height of the anti-collision steel plate are 50-120 multiplied by 0.5-1.0 multiplied by 50-100 cm, the diameter of the hanging hole is 20-60 mm, the free length of the damping spring is 30-80 mm, the wire diameter is 3-5 mm, and the outer diameter is 30-100 mm.

Furthermore, the supporting structure is a hinged top beam, I-steel or log used for the advance support of the top plate at the end of the haulage roadway, and the rope is a steel wire rope or a hemp rope with the diameter of 5-15 mm and the length of 15-80 cm.

Furthermore, when the device is used, the device is integrally hung on a supporting structure of a top plate at the end of a transportation roadway at the joint of a scraper conveyor and a bridge loader on a fully mechanized mining face, firstly, a shackle penetrates through a hanging groove, the shackle is connected with a ring gasket at one end of a long screw through a screw nut, then a rope penetrates through a ring gasket welded at one end of a wire pipe in a lifting member, the whole device is hung on the supporting structure of the top plate at the end of the transportation roadway, the height of the arresting system is adjusted by adjusting the screwing allowance of the threaded connection of the wire pipe and the long screw, the position of the rope of the hanging arresting system in each tooth groove of a guide system is manually adjusted along with the propulsion of the fully mechanized mining face, so that the arresting system is moved forwards, when the arresting system moves to the rightmost end of the guide system and cannot move any more, the lifting member at the leftmost side is removed and is rearranged at the forefront, and manually pushing the guide system to move forwards until the shackles are connected with the suspension grooves in a matching mode one by one again, and resetting the arresting system at the leftmost side of the guide system, so that one step cycle is realized.

Advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

(1) simple structure

The device does not have complex elements such as hydraulic pressure and electric power, only includes operating system, guide system and arresting system, is the active connection between each system, and the structure is comparatively simple, very easily dismantles and assembles, and the cost of manufacture is low.

(2) Convenient to use

The device is light, and the rope of hanging the arresting system in the manual removal guide system tooth's socket can realize the device and move gradually along with the working face is propulsive. If the rope moves to the tooth socket terminal, 1-2 lifting systems closest to the working face are dismantled and laid ahead, then the I-shaped steel is directly pushed to move forwards, and the hanging system is reset to complete one step pitch cycle, so that the whole dismantling is not needed, and the operation is very convenient.

(3) High practicability

The vertical lifting of the device in the vertical direction can be realized by adjusting the screwing allowance of the inner wire tube and the long screw rod in the lifting system, the fluctuation change of a coal bed can be adapted, and the field practicability is strong.

The technical solution of the present invention is further described in detail by the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a schematic structural diagram of a gangue stopping and collision preventing device of a scraper conveyor head of a fully mechanized mining face in an embodiment.

Fig. 2 is a cross-sectional view taken along line a-a of fig. 1.

Fig. 3 is a cross-sectional view taken along line B-B of fig. 1.

Reference numbers in the figures: the device comprises the following components, by weight, 1-a haulage roadway, 2-a hydraulic support, 3-a scraper conveyor, 4-a large piece of coal gangue, 5-a gangue blocking anti-collision device, 6-a supporting structure, 7-a bridge loader, 51-a rope, 52-a lifting member, 53-a guide system, 54-a blocking system, 521-a ring gasket, 522-an inner wire pipe, 523-a long screw rod, 524-a bolt nut, 525-a shackle, 531-a mining I-steel, 532-an end suspension groove, 533-a middle suspension groove, 534-a tooth socket, 541-an anti-collision steel plate, 542-a buffer part and 543-a suspension hole.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

Referring to fig. 1-3, the gangue stopping and collision preventing device of the fully mechanized working face scraper conveyor head in the figure is a preferred scheme of the invention, and comprises a lifting system for adjusting the vertical height of the device, a guide system 53 for adjusting the horizontal position of the device and a blocking system 54 for controlling the flying out and collision of the gangue; the lifting system consists of 3-5 groups of lifting members 52, and each group of lifting members 52 consists of an inner wire tube 522, a long screw 523, two annular washers 521, a shackle 525 and a set of bolt and nut 524; the guide system 53 is formed by processing I-shaped steel with a web plate provided with a suspension groove and a tooth socket 534; the arresting system 54 is composed of a crash steel plate 541 and a buffer component 542 welded on the lower part of the crash steel plate 541; the guide system 53 is hung on a supporting structure of a top plate at the end of the haulage roadway through a lifting system, and the blocking system 54 at the lower part is hung in a tooth groove 534 of I-steel of the guide system 53 by adopting a rope.

One end of the inner wire pipe 522 and one end of the long screw 523 are both welded with a circular washer 521, the inner wire pipe 522 is in threaded connection with the other end of the long screw 523, the lifting of the device in the vertical direction can be realized by adjusting the screwing allowance of the threaded connection of the inner wire pipe 522 and the long screw 523, and the shackle 525 is connected with the circular washer 521 at one end of the long screw 523 through a bolt and a nut 524. Preferably, the models of the inner wire tube 522 and the long screw 523 are M20-M50, the length is 30-80 cm, the inner diameter of the annular gasket 521 is 10-50 mm, the outer diameter is 20-60 mm, the thickness is 10-30 mm, the shackle 525 is arched and is 0.33T or 0.5T, and the model of the bolt and nut 524 is M5-M20.

The suspension grooves are uniformly distributed on the I-shaped steel web plate and consist of two end suspension grooves and a middle suspension groove, and the suspension grooves are communicated with the tooth grooves 534 and smooth the corners. Preferably, the length of the I-steel is 5-7 m, the length and height of the end suspension groove is 30-60 multiplied by 30-60 mm, the length and height of the middle suspension groove is 30-60 multiplied by 10-30 mm, the groove depth of the tooth groove 534 is 20-60 mm, and the tooth angle is 8-75 degrees.

The length, width and height of the anti-collision steel plate 541 are 50-120 multiplied by 0.5-1.0 multiplied by 50-100 cm, the diameter of the hanging hole 543 is 20-60 mm, the free length of the damping spring is 30-80 mm, the wire diameter is 3-5 mm, and the outer diameter is 30-100 mm.

The supporting structure 6 is a hinged top beam, I-steel or log used for the advance support of the top plate at the end of the haulage roadway 1, and the rope is a steel wire rope with the diameter of 5-15 mm and the length of 15-80 cm.

When the device is used, the device is integrally hung on a supporting structure 6 of the end top plate of a transportation roadway 1 at the joint of a scraper conveyor 3 and a bridge loader 7 of a fully mechanized mining face, firstly, a shackle 525 penetrates through a hanging groove, the shackle 525 and a ring gasket 521 at one end of a long screw 523 are connected through a screw nut, then a rope penetrates through the ring gasket 521 welded at one end of a wire pipe 522 in the lifting member 52 and is hung on the supporting structure of the end top plate of the transportation roadway 1, the height of the arresting system 54 is adjusted by adjusting the screwing allowance of the threaded connection of the wire pipe 522 and the long screw 523, the position of the rope of the hanging arresting system 54 in each tooth socket 534 of a guide system 53 is manually adjusted along with the propulsion of the fully mechanized mining face so as to realize the forward movement of the arresting system 54, when the arresting system 54 moves to the rightmost end of the guide system 53 and cannot move any more, the leftmost lifting member 52 is removed and is newly arranged at the forefront, the guidance system 53 is then manually pushed forward until each shackle 525 is again coupled to the suspension channel in a one-to-one mating relationship, and the arresting system 54 is repositioned to the left-most side of the guidance system 53, thereby completing a step cycle.

The application of this embodiment is further described below in conjunction with the specific cases.

In the scheme, the section of the transportation roadway 1 of the fully mechanized mining face of a certain mine is in the shape of a straight-wall arch, and the net section is 5.0 multiplied by 3.7m²The supporting mode is 29U-shaped shed; replacing a U-shaped shed with a wooden shed in the range that the forward working face of the crossheading is not less than 10m, and carrying out shed support below the wooden shed by using a hinged top beam; the used length of the covering material is not less than 3.2m, the diameter of the covering material is more than 0.18m, and DJB-1200 (DJB-800)) The profile hinged top beam is used for supporting one beam and one column, and the shed legs are DW-25-45 type single hydraulic props. The model of the hydraulic support 2 is ZZG9200/21/42, the model of the scraper conveyor 3 is SGZ1000/1400, and the model of the bridge loader 7 is SZZ 800/315. At the end of the haulage roadway 1, the anti-collision gangue blocking device 5 is positioned at the joint of the scraper conveyor 3 and the bridge loader 7 and is hung on a log beam supporting structure 6 at the end of the haulage roadway 1 by a steel wire rope 51.

The anti-collision gangue blocking device 5 consists of a lifting system consisting of lifting members 52, a guide system 53 and a blocking system 54. The lifting member 52 has 3 groups, and the main components are a circular washer 521, an inner wire tube 522, a long screw 523, a bolt nut 524 and an arc shackle 525. The upper end of the inner wire pipe 522 is welded with a circular washer 521, the rope 51 passes through the circular washer 521 and is bound on the log beam supporting structure 6, the lower end of the inner wire pipe 522 is in threaded connection with the upper end of the long screw 523, and the lower end of the long screw 523 is also welded with the circular washer 521. The shackle 525 is located at the lowermost end of the lifting member 52, and the shackle 525 and a ring washer 521 at the lower end are hingedly connected by a bolt nut 524. The rope 51 is a steel wire rope with the diameter of 8mm and the length of 600 mm; the inner diameter of the circular washer 521 is 30mm, the outer diameter is 50mm, and the thickness is 20 mm. The models of the inner wire tube 522 and the long screw 523 are M30, the lengths of the inner wire tube 522 and the long screw 523 are both 60cm, and the lifting of the device can be realized by adjusting the screwing allowance of the threaded connection of the inner wire tube 522 and the long screw 523. Shackle 525 is of the 0.33T class, and bolt and nut 524, which is hingedly connected to ring washer 521, is of the M10 type. The guiding system 53 is mainly formed by processing 11# mining I-steel 531 with the length of 7m, two ends of a web plate of the I-steel are respectively provided with an end hanging groove 532 penetrating through the I-steel, the middle of the web plate of the I-steel is provided with a middle hanging groove 533 and a plurality of tooth sockets 534, the hanging grooves are communicated with the tooth sockets 534 and smooth corners, the length and the height of the end hanging groove 532 are 40 multiplied by 60mm, the length and the height of the middle hanging groove 533 are 40 multiplied by 30mm, the groove depth of the tooth sockets 534 is 60mm, and the tooth angle is 20 degrees. Shackle 525 passes through end suspension slot 532 and intermediate suspension slot 533 to effect active connection of lifting member 52 and guide system 53.

The arresting system 54 includes a crash panel 541 and a cushioning member 542. The length, width and height of the anti-collision steel plate 541 are 120 multiplied by 0.8 multiplied by 100cm, and the material is Q460 high-strength steel; the buffer member 542 is welded to the crash steel plate 541, and includes 3 damping springs therein, the free length of which is 60mm, the wire diameter of which is 4mm, and the outer diameter of which is 50 mm. Two circular hanging holes 543 with a diameter of 40mm are opened at the upper left and right corners of the crash steel plate 541, and the steel wire 51 passes through the circular hanging holes 543 to hang the arresting system 54 on the tooth socket 534 in the guiding system 53.

As the working surface advances, the hydraulic support 2 pushes the scraper conveyor 3 to move forward, and the bridge loader 7 moves along with the forward movement. Therefore, the gangue dumping prevention device 5 also needs to move forward along with the gangue dumping prevention device. The method comprises the following steps: the positions of the steel cables 51 hanging the arresting system 54 at different tooth sockets 534 in the guide system 53 are manually adjusted forwards, so that the arresting system 54 is moved forwards. When the arresting system 54 moves to the rightmost end of the guide system 53 and cannot move any more, the leftmost lifting member 52 is detached and arranged at the forefront again, the I-steel is pushed manually to move forwards until the three shackles 525 are reconnected with the suspension groove, and the arresting system 54 is reset at the leftmost side of the guide system 53, namely, a step cycle is realized. The device has the advantages of simple structure, low manufacturing cost and convenient operation, and can adapt to the fluctuation of the haulage roadway along with the coal seam through adjusting the height of the device.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The utility model provides a combine and adopt working face scraper conveyor aircraft nose fender cash buffer stop which characterized in that: the coal gangue collision prevention device is composed of a lifting system for adjusting the vertical height of the device, a guide system for adjusting the horizontal position of the device and a blocking system for controlling coal gangue flying out and collision; the lifting system consists of 3-5 groups of lifting components, and each group of lifting components consists of an inner wire tube, a long screw, two circular washers, a shackle and a set of bolt and nut; the guide system is formed by processing I-shaped steel with a web plate provided with a suspension groove and a tooth groove; the arresting system consists of an anti-collision steel plate and a buffer component welded at the lower part of the anti-collision steel plate; the guide system is hung on a supporting structure of a top plate at the end of the haulage roadway through a lifting system, and the blocking system at the lower part is hung in a tooth groove of I-shaped steel of the guide system through a rope; the one end of interior screwed pipe and the one end of long screw rod all weld a ring packing ring, and the other end of interior screwed pipe and long screw rod adopts threaded connection, can realize the ascending and descending of device in vertical direction through adjusting the surplus of screwing of interior screwed pipe and long screw rod threaded connection, the ring packing ring of shackle and long screw rod one end passes through bolt and nut and connects.

2. The machine head gangue stopping and collision preventing device of the fully mechanized mining face scraper conveyor according to claim 1, characterized in that: the suspension grooves are uniformly distributed on the I-shaped steel web plate and consist of two end suspension grooves and a middle suspension groove, and the suspension grooves are communicated with the tooth grooves and smooth the corners.

3. The machine head gangue stopping and collision preventing device of the fully mechanized mining face scraper conveyor according to claim 1, characterized in that: the anti-collision steel plate is made of high-strength steel, two circular hanging holes are formed in the upper corner of the anti-collision steel plate, the buffering part is welded to the lower portion of the anti-collision steel plate, and 2-3 damping springs are arranged inside the buffering part.

4. The machine head gangue stopping and collision preventing device of the fully mechanized mining face scraper conveyor according to claim 1, characterized in that: the inner wire pipe and the long screw are M20-M50 in model, 30-80 cm in length, the inner diameter of the circular washer is 10-50 mm, the outer diameter of the circular washer is 20-60 mm, the thickness of the circular washer is 10-30 mm, the shackle is arched and is 0.33T or 0.5T in model, and the bolt and the nut are M5-M20 in model.

5. The fully mechanized mining face scraper conveyor head gangue blocking anti-collision device of claim 2, characterized in that: the length of the I-steel is 5-7 m, the length and height of the end suspension groove is 30-60 multiplied by 30-60 mm, the length and height of the middle suspension groove is 30-60 multiplied by 10-30 mm, the depth of the tooth groove is 20-60 mm, and the tooth angle is 8-75 degrees.

6. The fully mechanized mining face scraper conveyor head gangue blocking anti-collision device of claim 3, which is characterized in that: the length, width and height of the anti-collision steel plate are 50-120 multiplied by 0.5-1.0 multiplied by 50-100 cm, the diameter of the hanging hole is 20-60 mm, the free length of the damping spring is 30-80 mm, the wire diameter is 3-5 mm, and the outer diameter is 30-100 mm.

7. The machine head gangue stopping and collision preventing device of the fully mechanized mining face scraper conveyor according to claim 1, characterized in that: the supporting structure is a hinged top beam, I-shaped steel or log used for the advance support of a top plate at the end of a transportation roadway, and the rope is a steel wire rope or a hemp rope with the diameter of 5-15 mm and the length of 15-80 cm.

8. The use method of the device for preventing the gangue from being collided by the nose of the scraper conveyor of the fully mechanized mining face according to any one of claims 1 to 7 is characterized in that: when the device is used, the device is integrally hung on a supporting structure of a top plate at the end of a transportation roadway at the joint of a scraper conveyor and a bridge loader on a fully mechanized mining face, firstly, a shackle penetrates through a hanging groove, the shackle is connected with a ring gasket at one end of a long screw through a screw nut, then a rope penetrates through a ring gasket welded at one end of an inner wire pipe of a lifting member, the whole device is hung on the supporting structure of the top plate at the end of the transportation roadway, the height of a blocking system is adjusted by adjusting the screwing allowance of the threaded connection of the inner wire pipe and the long screw, the position of the rope of the hanging blocking system in each tooth socket of a guide system is manually adjusted along with the advance of the fully mechanized mining face, so that the forward movement of the blocking system is realized, when the blocking system moves to the rightmost end of the guide system and cannot move any more, the lifting member at the leftmost side is detached and is rearranged at the forefront, and the guide system is manually pushed forward until each shackle is matched and connected with the hanging groove again one by one another, and the arresting system is reset at the leftmost side of the guiding system, thereby realizing a step cycle.