阅读说明：本技术 一种薄煤层端头液压支架 (Hydraulic support for end of thin coal seam ) 是由 李明忠 佟友 杨征 马英 苏林军 马端志 刘剑 李提建 于 2020-06-28 设计创作，主要内容包括：一种薄煤层端头液压支架,包括顶梁和顶梁铰接的折叠式平行侧推机构,其包括上侧护板、下侧护板、连接杆和千斤顶,上侧护板上耳座a与顶板耳座A铰接,上侧护板下耳座b与下侧护板上耳座a’铰接,连接杆上端与主筋耳座B铰接,连接杆下端与下侧护板耳座b’铰接,千斤顶上与腹板处的耳座C铰接,千斤顶下端与下侧护板耳座c’铰接,耳座A为n个,耳座B为n-1个,各耳座A的铰接孔中心线对正,各耳座B的铰接孔中心线对正,耳座A与耳座B的铰接孔中心线与主筋等距；耳座C个数与耳座B相同并在耳座A耳座B之间,耳座c’位于上耳座a’与耳座b’之间,耳座A与上耳座a的铰接孔中心线至下耳座b与上耳座a’的铰接孔中心线的距离同耳座B与连接杆的上端的铰接孔中心线至下耳座b’与该连接杆的下端的铰接空中心线距离相等。(A hydraulic support for the end of a thin coal seam comprises a top beam and a top beam hinged folding type parallel side pushing mechanism, and comprises an upper side protection plate, a lower side protection plate, a connecting rod and a jack, wherein an upper ear seat a of the upper side protection plate is hinged with a top plate ear seat A, a lower ear seat B of the upper side protection plate is hinged with an upper ear seat a ' of the lower side protection plate, the upper end of the connecting rod is hinged with a main rib ear seat B, the lower end of the connecting rod is hinged with a lower side protection plate ear seat B ', the jack is hinged with an ear seat C at a web plate, the lower end of the jack is hinged with an ear seat C ' of the lower side protection plate, the number of the ear seats A is n, the number of the ear seats B is n-1, the center lines of hinge holes of the ear seats A are aligned, the center lines of the; the number of the ear seats C is the same as that of the ear seats B and is between the ear seats A and B, the ear seats C ' are positioned between the upper ear seats a ' and the ear seats B ', and the distance from the center line of the hinge hole of the ear seats A and the upper ear seats a to the center line of the hinge hole of the lower ear seats B and the upper ear seats a ' is equal to the distance from the center line of the hinge hole of the upper ends of the ear seats B and the connecting rod to the center line of the hinge hole of the lower ear seats B ' and the lower ends of the connecting rod.)

1. The utility model provides a thin coal seam end hydraulic support which characterized in that: the foldable parallel side pushing mechanism comprises an upper side guard plate, a lower side guard plate, a connecting rod and a jack, wherein an upper ear seat a of the upper side guard plate is hinged with an ear seat A corresponding to a top plate of the top beam, a lower ear seat B of the upper side guard plate is hinged with an upper ear seat a ' corresponding to the lower side guard plate, the upper end of the connecting rod is hinged with an ear seat B of a main rib at the movable side of the top beam, the lower end of the connecting rod is hinged with an ear seat B ' of the lower side guard plate, the lower cavity end of the jack is hinged with an ear seat C at a web plate of the top beam, the piston rod end of the jack is hinged with an ear seat C ' of the lower side guard plate, the ear seats A of the top plate are n and are arranged at intervals along the front and back direction of the top plate, the central lines of holes of the ear seats A are aligned, the ear seats B of the main rib at the movable side of the top beam are n-1 and are arranged concentrically, the center lines of the hinge holes of the ear seats B are aligned, the ear seats A and the ear seats B are arranged in a vertically staggered manner at intervals, and the center lines of the hinge holes of the ear seats A and the ear seats B are equidistant from the movable side main ribs of the top beam; the number of the ear seats C is the same as that of the ear seats B, the ear seats C are located between the ear seats A and the ear seats B, the ear seats C 'are located between the upper ear seats a' and the ear seats B ', the distance L1 from the center line of the hinge hole of the ear seats A and the upper ear seats a to the center line of the hinge hole of the lower ear seats B and the upper ear seats a' is equal to the distance L2 from the center line of the hinge hole of the upper end of the ear seats B and the connecting rod to the center line of the hinge hole of the lower ear seats B 'and the lower end of the connecting rod, the center line of the hinge hole of the ear seats A and the center line of the hinge hole of the ear seats B are on the same vertical plane, and the center lines of the hinge holes of the ear seats a' and the.

2. The hydraulic support for the end of a thin coal seam as claimed in claim 1, wherein: the top plate is provided with four lug seats A, three lug seats B and three lug seats C.

3. The hydraulic support for the end of a thin coal seam as claimed in claim 2, wherein: from first ear seat C of the front end of back timber is located between first ear seat B and the second ear seat A, and second ear seat C is located between second ear seat B and the third ear seat A, and third ear seat C is located between third ear seat B and the fourth ear seat A.

4. The hydraulic support for the end of a thin coal seam as claimed in claim 1, wherein: the cylinder diameter of the jack is 125mm or 140 mm.

5. The hydraulic support for the end of a thin coal seam as claimed in claim 4, wherein: stroke 200 and 400 of the jack.

Technical Field

The invention relates to a coal mine working face supporting device, in particular to a thin coal seam end hydraulic support matched with a transition support for use.

Background

China has large storage capacity of coal resources, and the recoverable storage capacity of a thin coal seam with the thickness less than 1.3 m accounts for about 18% of the total amount of coal in China. The thin coal seam is a main coal occurrence form, in recent years, with the continuous reduction of coal resource reserves and the exhaustion of medium and thick coal seams, for the continuous development of coal industry, a plurality of mining areas are important for the long-term utilization of established mines and the exploitation of the thin coal seam. However, the natural geological conditions of the thin coal seam are poor, the economic benefit is low, the mining height is low, the operation space is small, the working environment conditions are poor, and the safety accidents are relatively more. The development and investment of mechanical equipment for mining the thin coal seam are lagged behind those of medium-thick coal seams, particularly, the tunnel of the thin coal seam requires human space to meet the requirements of safety and transportation equipment, so the hole cutting position is generally in a dumbbell shape, and the two tunnels have height difference with the working surface, namely large gradient transition. Different mining areas adopt different tunneling modes, some of which are along a bottom breaking top plate and some of which are along a top breaking bottom plate. The end hydraulic support is an important component of the working face supporting equipment, and whether the design of the end hydraulic support is reasonable or not plays a certain role in the speed of recovery at two ends. The side guard plate is also a main part of the end head frame, and mainly has the functions of sealing the adjacent frame, adjusting the frame, preventing collapse and maintaining the transverse stability of the support, and has important influence on the working performance of the support.

Disclosure of Invention

The invention aims to solve the technical problems and provides a hydraulic support for an end of a thin coal seam, which can effectively solve the problem of gangue leakage caused by a large-gradient transition part of a working surface of the thin coal seam.

In order to achieve the purpose, the invention adopts the following technical scheme:

a hydraulic support for the end of a thin coal seam comprises a top beam and a folding parallel side pushing mechanism hinged to the movable side of the top beam, wherein the folding parallel side pushing mechanism comprises an upper side guard plate, a lower side guard plate, a connecting rod and a jack, an upper lug seat a of the upper side guard plate is hinged to a lug seat A corresponding to a top plate of the top beam, a lower lug seat B of the upper side guard plate is hinged to an upper lug seat a ' corresponding to the lower side guard plate, the upper end of the connecting rod is hinged to a lug seat B of a main rib at the movable side of the top beam, the lower end of the connecting rod is hinged to a lug seat B ' of the lower side guard plate, the lower cavity end of the jack is hinged to a lug seat C at a web plate of the top beam, the piston rod end of the jack is hinged to a lug seat C ' of the lower side guard plate, the lug seats A of the top plate are arranged at intervals along the front and back direction of the top plate, the center line of hinge holes of each lug seat A are aligned, the lug, the center lines of the hinge holes of the ear seats B are aligned, the ear seats A and the ear seats B are arranged in a vertically staggered manner at intervals, and the center lines of the hinge holes of the ear seats A and the ear seats B are equidistant from the movable side main ribs of the top beam; the number of the ear seats C is the same as that of the ear seats B, the ear seats C are located between the ear seats A and the ear seats B, the ear seats C 'are located between the upper ear seats a' and the ear seats B ', the distance L1 from the center line of the hinge hole of the ear seats A and the upper ear seats a to the center line of the hinge hole of the lower ear seats B and the upper ear seats a' is equal to the distance L2 from the center line of the hinge hole of the upper end of the ear seats B and the connecting rod to the center line of the hinge hole of the lower ear seats B 'and the lower end of the connecting rod, the center line of the hinge hole of the ear seats A and the center line of the hinge hole of the ear seats B are on the same vertical plane, and the center lines of the hinge holes of the ear seats a' and the.

Preferably, the top plate has four ear seats a, three ear seats B and three ear seats C.

Preferably, a first ear seat C from the front end of the top beam is located between the first ear seat B and the second ear seat a, a second ear seat C is located between the second ear seat B and the third ear seat a, and a third ear seat C is located between the third ear seat B and the fourth ear seat a.

Preferably, the cylinder diameter of the jack is 125mm or 140 mm.

Preferably, the jack stroke 200-.

The invention has the beneficial effects that:

1. the end hydraulic support of the working surface of the thin coal seam obtained by the invention can completely adapt to the radian of a top angle left in roadway excavation, and the side protection plate can transversely and longitudinally avoid the radian of 200-400 mm according to the actual condition, so that the range of the transition frame sliding down along with the upward movement of a scraper conveyor in the stoping process is larger, the side protection plates between the supports can be tightly attached without waste rock leakage, the coal content is reduced by 5%, the coal quality is improved, and the end hydraulic support has wide popularization and application prospects. The width of the end head frame of the side protection mechanism is not standard frame width, and can be adjusted according to the matching condition, and the pushing point on the scraper conveyer is correspondingly adjusted.

2. The side-push jack of the folding parallel side-push mechanism is arranged below the top beam web plate, the specification of the cylinder diameter is not limited by the top beam structure (the maximum specification of the cylinder diameter of the side-push mechanism is 100mm when the side-push cylinder is vertically lengthened), and the side-push force can be increased by increasing the cylinder diameter of the side-push cylinder, so that the friction force between the side guard plates of the support is increased, and the gangue leakage is improved.

3. The foldable parallel four-bar side protection mechanism can fully exert the sealing advantage between the end head frame and the transition frame of the thin coal seam, has larger side thrust force and can avoid the radians of a roadway roof and a lower wall support. The supporting force to the surrounding rock is reasonable, the gangue restraining effect is good, and the structure is reliable.

Drawings

Fig. 1 is a schematic view of a state of use of an end hydraulic head bracket of the prior art.

Fig. 2 is a schematic view of the use state of the head hydraulic support of the invention.

Fig. 3 is a schematic structural diagram of the head hydraulic support of the present invention.

Fig. 4 is a schematic view of the direction a-a in fig. 3 (the jack is in a retracted state).

Fig. 5 is a schematic structural view of the extended state of the jack in fig. 4.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the invention.

Referring to fig. 2 to 5, which are preferred embodiments of the present invention, a hydraulic support for a thin seam end comprises a top beam 1 and a folding parallel side pushing mechanism 2 hinged on a movable side of the top beam 1, the folding parallel side-push mechanism comprises an upper side guard plate 21, a lower side guard plate 22, a connecting rod 23 and a jack 24, wherein an upper ear seat a211 of the upper side guard plate 21 is hinged with an ear seat A111 corresponding to a top plate 11 of a top beam 1 through a pin shaft, the lower ear seat b212 of the upper guard plate 21 is hinged with the corresponding upper ear seat a' 221 of the lower guard plate 22 through a pin shaft, the upper end of the connecting rod 23 is hinged with the ear seat B121 of the movable side main rib 12 of the top beam 1 through a pin shaft, the lower end of the connecting rod 23 is hinged with the ear seat b' 222 of the lower side guard plate 22 through a pin shaft, the lower cavity end of the jack 24 is hinged with an ear seat C131 at the web plate 13 of the top beam 1 through a pin shaft, the piston rod end of the jack 24 is hinged with the lug seat c' 223 of the lower side guard plate 22 through a pin shaft; the four lug seats A111 of the top plate 11 are uniformly arranged at intervals along the front-back direction of the top plate 11, the lug seats A111 are single lug plates, each single lug plate is provided with a hinge hole, and the central lines of the four hinge holes are aligned; the ear seats B121 of the movable side main ribs of the top beam are three ear plates which are uniformly arranged at intervals along the front-back horizontal direction of the top plate, the ear seats B121 are two ear plates which are aligned at intervals, aligned hinge holes are formed in the two ear plates, the center lines of the hinge holes of the ear seats B are aligned, the ear seats A and the ear seats B are arranged in a vertically staggered mode at intervals, and the center lines of the hinge holes of the ear seats A and the ear seats B are equidistant to the movable side main ribs of the top beam; the number of the ear seats C131 is the same as that of the ear seats B121, the ear seats C are located between the ear seats a and B, preferably, a first ear seat C from the front end of the top beam is located between the first ear seat B and a second ear seat a, the second ear seat C is located between the second ear seat B and a third ear seat a, and the third ear seat C is located between the third ear seat B and a fourth ear seat a; the ear seat c '223 is located between the upper ear seat a' 221 and the ear seat B '222, the distance L1 from the center line of the hinge hole of the ear seat a111 and the upper ear seat a211 to the center line of the hinge hole of the lower ear seat B212 and the upper ear seat a' 221 is equal to the distance L2 from the center line of the hinge hole of the ear seat B121 and the upper end of the connecting rod 23 to the center line of the hinge hole of the ear seat B '222 and the lower end of the connecting rod 23, the center line of the hinge hole of the ear seat a and the center line of the hinge hole of the ear seat B are on the same vertical plane, the vertical distance from the center line of the hinge hole of the ear seat a to the center line of the hinge hole of the ear seat B is equal to the vertical distance from the center line of the hinge hole of the ear seat a' to the center line of the hinge hole of the ear seat B. Namely, in the process of the jack telescoping, four connecting lines of the center of the ear seat a, the center of the ear seat B' and the center of the ear seat B form a parallelogram, as shown in fig. 4 and 5.

The jack 24 is installed below the top beam, is not influenced by the structure of the top beam, and has a cylinder diameter of 125mm (corresponding to working resistance of 386kN) or 140mm (corresponding to working resistance of 485 kN). The stroke of the jack is 200mm to 400 mm. During the pushing process of the jack 24, the upper side guard plate 21 rotates around the top plate ear seat, and the lower side guard plate 22 is always in vertical movement.

The invention ensures the support effect and simultaneously gives consideration to the gangue leakage control among the frames. The folding type flat side pushing mechanism can fully exert the sealing advantage between the end head frame and the transition frame of the thin coal seam, has larger side pushing force, and can avoid the radians of a roadway top plate and a lower wall support. The supporting force to the surrounding rock is reasonable, the gangue restraining effect is good, and the structure is mature and reliable.