Large mining height working face five-enclosed retracement support

Abstract

The application discloses a five-shielded withdrawing support for a large-mining-height working face and relates to the technical field of coal mining equipment. The five-shielded withdrawing support for the large-mining-height working face is more convenient for support direction adjustment in support withdrawing by arranging five groups of external withdrawing supports, realizes mechanical support of a roof triangular area at a withdrawing end, effectively reduces an empty roof area, reduces the danger of gangue and roof leakage, strengthens support strength, reduces the labor intensity of workers compared with a common shielded support withdrawing process, guarantees the personal safety of operating personnel, reduces the consumption of support materials, greatly improves work efficiency, ensures the safe withdrawing of the support of the large-mining-height working face, can be popularized and applied to the withdrawing of similar working faces, adopts a method of withdrawing the support by traction and lowering at the same time until the shielded support base exceeds an adjacent support and is adjusted to be withdrawn, and the withdrawing is very convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal mining equipment, in particular to a five-shield retracement support for large-mining-height working face. BACKGROUND

[0002] At present, in the process of retracement in coal mining, the main retracement channel is generally 5.5 meters wide, and four special shield supports are usually used to control the roof, and wood piles are used for support. When the wood pile support is used, the workers are almost exposed to the open roof. In order to shorten the open roof operation time and reduce the safety hazards, the wood pile support workers need to cooperate with each other to complete the support as soon as possible on the basis of qualified wood piles. The labor intensity of workers is large, and the danger is high. For large-mining-height support retracement, roof management is the most important in the whole retracement work. The traditional roof management method has the problems of large wood consumption, serious resource waste, high cost, and the labor intensity of workers is larger and the danger is higher.

[0003] For example, patent publication No. CN205876369U discloses a large-mining-height working face hydraulic support transition frame. The transition frame includes a reinforced side guard plate, which is arranged on the machine head transition frame and the machine tail transition frame of the fully mechanized working face close to the coal wall side. The reinforced side guard plate includes an upper guard plate, the upper end of which is fixedly connected with the support top beam of the transition frame, and the lower end of the upper guard plate is connected with a lower guard plate. The total height of the upper guard plate and the lower guard plate is not less than the height difference of the coal wall. The roof height of the fully mechanized working face and the height difference of the roadway are cumulatively transitioned at the reinforced side guard plate of the large-mining-height working face hydraulic support transition frame, so that the previous gentle transition of the machine head and the machine tail frame of the fully mechanized working face is avoided, and the waste of coal resources is reduced. Since there is no need to use gentle transition, the risk of the hydraulic support of the machine head and the machine tail frame of the fully mechanized working face is reduced.

[0004] The patent only sets one retracement support, which cannot completely support the top of the mine tunnel, and has the risk of leakage of gangue and roof. The overall strength is not very high. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a five-shield retracement support for large-mining-height working face, which solves the problem of low overall strength.

[0006] To achieve the above object, the present application is implemented by the following technical solutions: A large mining height working face five shielded retracement support, comprising an external retracement support, a shield frame base is arranged on the lower side of the external retracement support, an inspection opening is arranged on the rear side of the shield frame base, a fixed plate is fixedly installed on the upper side of the shield frame base, the external retracement support is installed on the inner side of the fixed plate through a shaft, a fixed block is fixedly installed on the lower side of the external retracement support, a first rotating support is installed on the lower side of the fixed block through a shaft, a connecting block is fixedly installed on the upper side of the first rotating support, the connecting block is installed on the inner side of the fixed block through a shaft, a second rotating support is installed on the inner side of the first rotating support through a shaft, a first hydraulic cylinder is fixedly installed on the upper side of the shield frame base, a second hydraulic cylinder is arranged on the right side of the first hydraulic cylinder, a protective plate is fixedly installed on the outer sides of the first hydraulic cylinder and the second hydraulic cylinder, a protective frame is arranged on the outer side of the protective plate, a fixed bolt is detachably installed on the outer side of the external retracement support, a first connecting frame is fixedly installed on the upper side of the external retracement support, a second connecting frame is arranged on the front side of the shield frame base, and a pulley is detachably installed on the inner sides of the first connecting frame and the second connecting frame.

[0007] Preferably, the external retracement support is provided with five groups, a connecting plate is installed on the upper sides of the first hydraulic cylinder and the second hydraulic cylinder through a shaft, and the connecting plate is fixedly installed on the lower side of the external retracement support. By providing five groups of external retracement supports, the support direction in the support retracement can be more conveniently adjusted, the mechanical support of the roof in the three-angle area at the end of the retracement is realized, and the empty roof area is effectively reduced.

[0008] Preferably, the protective frame is fixedly installed on the upper side of the shield frame base, and a protective net is arranged on the inner side of the protective frame. By arranging the protective net, a certain protection effect can be achieved to avoid the impact of minerals on the workers.

[0009] Preferably, a first push-pull rod is installed between the external retracement support and the first rotating support through a shaft, and a second push-pull rod is installed between the first rotating support and the second rotating support through a shaft. The first push-pull rod can push the first rotating support to rotate, the second push-pull rod can push the second rotating support to rotate, so as to change the inclination angles of the first rotating support and the second rotating support, and the working face can be better supported.

[0010] Preferably, a roller is arranged on the lower side of the shield frame base, and anti-skid protrusions are uniformly arranged on the surface of the shield frame base. By arranging the roller, the friction between the shield frame base and the ground can be reduced, and the bottom of the shield frame base can be prevented from being worn.

[0011] Preferably, sliding blocks are fixedly installed on the left and right sides of the second connecting frame, and clamping blocks are arranged on the front sides of the sliding blocks. By arranging the sliding blocks, the second connecting frame can be limited to avoid being separated from the shield frame base.

[0012] Further, a sliding slot corresponding to the sliding block is arranged on the inner side of the shield frame base, and a clamping hole corresponding to the clamping block is arranged on the inner side of the sliding slot.

[0013] Preferably, a fixing bolt is detachably arranged on the outer side of the first connecting frame and the second connecting frame, and threads are arranged on both sides of the fixing bolt.

[0014] Further, the pulley is arranged on the outer side of the fixing bolt, and a nut is arranged on the outer side of the fixing bolt.

[0015] Preferably, the protective plate is fixedly arranged on the upper side of the shield frame base, and three groups of protective plates are arranged.

[0016] Advantages

[0017] The present application provides a five-shielded withdrawing support for a large-mining-height working face.

[0018] Advantages

[0019] 1. The five-shielded withdrawing support for a large-mining-height working face is provided with five groups of external withdrawing supports, which is more convenient for the orientation of the support during the withdrawing of the support, realizes the mechanized support of the roof in the triangular area at the end of the withdrawing, effectively reduces the empty roof area, reduces the risk of gangue and roof leakage, and strengthens the support strength.

[0020] 2. The five-shielded withdrawing support for a large-mining-height working face is provided with a first connecting frame, a second connecting frame and a pulley. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The structure of the present application is shown in the figure;

[0022] Figure 2 The structure of the shield frame base in the present application is shown in the figure;

[0023] Figure 3 is a structural schematic view of the second connecting frame in the present application;

[0024] Figure 4 is a structural schematic view of the protective frame in the present application;

[0025] Figure 5 is a structural schematic view of the first rotating support in the present application in an open state;

[0026] Figure 6 is an enlarged view of the connecting block in the present application.

[0027] In the figure: 1, external retractable support; 2, fixed block; 3, first rotating support; 301, connecting block; 4, second rotating support; 5, fixed bolt; 6, shield frame base; 7, fixed plate; 8, protective net; 9, nut; 10, first hydraulic cylinder; 11, second hydraulic cylinder; 12, protective plate; 13, protective frame; 14, anti-skid protrusion; 15, first connecting frame; 16, sliding groove; 17, pulley; 18, roller; 19, fixed bolt; 20, second connecting frame; 21, sliding block; 22, clamping block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] Please refer to Figures 1-6The application provides a technical scheme: a five-shielded retracement support for a large mining height working face, which comprises an external retracement support 1, a shielded support base 6 arranged on the lower side of the external retracement support 1, a maintenance opening arranged on the rear side of the shielded support base 6, a fixed plate 7 fixedly installed on the upper side of the shielded support base 6, the external retracement support 1 being installed on the inner side of the fixed plate 7 through a shaft, a fixed block 2 fixedly installed on the lower side of the external retracement support 1, a first rotating support 3 installed on the lower side of the fixed block 2 through a shaft, a connecting block 301 fixedly installed on the upper side of the first rotating support 3, the connecting block 301 being installed on the inner side of the fixed block 2 through a shaft, a second rotating support 4 installed on the inner side of the first rotating support 3 through a shaft, a first hydraulic cylinder 10 fixedly installed on the upper side of the shielded support base 6, a second hydraulic cylinder 11 arranged on the right side of the first hydraulic cylinder 10, a protective plate 12 fixedly installed on the outer sides of the first hydraulic cylinder 10 and the second hydraulic cylinder 11, a protective frame 13 arranged on the outer side of the protective plate 12, a fixed bolt 5 detachably installed on the outer side of the external retracement support 1, the external retracement support 1 being locked through the fixed bolt 5, a first connecting frame 15 fixedly installed on the upper side of the external retracement support 1, a second connecting frame 20 arranged on the front side of the shielded support base 6, and a pulley 17 detachably installed on the inner sides of the first connecting frame 15 and the second connecting frame 20, the pulley 17 being used for installing a winch steel wire rope.

[0030] The external retracement support 1 is provided with five groups, a connecting plate is installed on the upper sides of the first hydraulic cylinder 10 and the second hydraulic cylinder 11 through a shaft, the connecting plate is fixedly installed on the lower side of the external retracement support 1, the protective frame 13 is fixedly installed on the upper side of the shielded support base 6, a protective net 8 is arranged on the inner side of the protective frame 13, a first push-pull rod is installed between the external retracement support 1 and the first rotating support 3 through a shaft, a second push-pull rod is installed between the first rotating support 3 and the second rotating support 4 through a shaft, a roller 18 is arranged on the lower side of the shielded support base 6, anti-skid protrusions 14 are uniformly arranged on the surface of the shielded support base 6, sliding blocks 21 are fixedly installed on the left and right sides of the second connecting frame 20, clamping blocks 22 are arranged on the front sides of the sliding blocks 21, a sliding groove 16 corresponding to the sliding blocks 21 is formed in the inner side of the shielded support base 6, clamping holes corresponding to the clamping blocks 22 are formed in the inner side of the sliding groove 16, fixed bolts 19 are detachably installed on the outer sides of the first connecting frame 15 and the second connecting frame 20, threads are arranged on the two sides of the fixed bolts 19, the pulley 17 is arranged on the outer side of the fixed bolt 19, nuts 9 are arranged on the outer side of the fixed bolt 19, the pulley 17 is fixedly arranged on the first connecting frame 15 and the second connecting frame 20 through the nuts 9 and the fixed bolts 19, the protective plate 12 is fixedly installed on the upper side of the shielded support base 6, and the protective plate 12 is provided with three groups.

[0031] In operation, the shield support is not allowed to be pulled to the position at one time, and the winch steel wire rope is connected with the push-pull rod of the external back-off support 1 when the external back-off support 1 is back-off, the shield support is pulled to the position slowly in two times under the traction of the winch, the wood piles are set in the triangular area in time after the side support is back-off, the strength of the support is ensured, the external back-off support 1 is set in five groups, the support is more convenient to adjust the direction in the back-off of the support, the mechanical support of the roof in the triangular area of the back-off end is realized, the empty roof area is effectively reduced, the danger of the leakage of the gangue and the roof is reduced, the support strength is enhanced, compared with the common back-off process of the shield support, the labor intensity of the workers is reduced, the personal safety of the operation personnel is ensured, the consumption of the support material is reduced, the work efficiency is greatly improved, the safe back-off of the support in the large mining height working face is ensured, the back-off can be applied to the similar working face, the first connecting frame 15, the second connecting frame 20 and the pulley 17 are set, the pulley 17 is installed on the first connecting frame 15 and the second connecting frame 20 to form the movable pulley 17 when the support is back-off, the winch steel wire rope is sequentially passed through the pulley 17 and fixed in the horizontal pin hole of the push-pull rod of the shield support, the winch is started at this time, the support is pulled and the support is lowered at the same time, the support is pulled out until the shield support base 6 exceeds the adjacent support and is adjusted to back-off, the back-off is very convenient.

[0032] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by the person skilled in the art.

Claims

1. A large mining height working face five-shield retracement support, comprising an external retracement support (1), characterized in that: The exterior retracting support (1) is provided with a shield frame base (6) on the lower side, an inspection opening is arranged on the rear side of the shield frame base (6), a fixed plate (7) is fixedly installed on the upper side of the shield frame base (6), the exterior retracting support (1) is installed on the inner side of the fixed plate (7) through a shaft, a fixed block (2) is fixedly installed on the lower side of the exterior retracting support (1), a first rotating support (3) is installed on the lower side of the fixed block (2) through a shaft, a connecting block (301) is fixedly installed on the upper side of the first rotating support (3), the connecting block (301) is installed on the inner side of the fixed block (2) through a shaft, a second rotating support (4) is installed on the inner side of the first rotating support (3) through a shaft, a first hydraulic cylinder (10) is fixedly installed on the upper side of the shield frame base (6), a second hydraulic cylinder (11) is arranged on the right side of the first hydraulic cylinder (10), a protection plate (12) is fixedly installed on the outer sides of the first hydraulic cylinder (10) and the second hydraulic cylinder (11), a protection frame (13) is arranged on the outer side of the protection plate (12), a fixed bolt (5) is detachably installed on the outer side of the exterior retracting support (1), a first connecting frame (15) is fixedly installed on the upper side of the exterior retracting support (1), a second connecting frame (20) is arranged on the front side of the shield frame base (6), and a pulley (17) is detachably installed on the inner sides of the first connecting frame (15) and the second connecting frame (20).

2. The large mining height face five-shield retreatable support according to claim 1, characterized in that: The exterior retracting support (1) is provided with five groups, a connecting plate is installed on the upper sides of the first hydraulic cylinder (10) and the second hydraulic cylinder (11) through a shaft, and the connecting plate is fixedly installed on the lower side of the exterior retracting support (1).

3. The large mining height face five-shield retreating support according to claim 1, characterized in that: The protection frame (13) is fixedly installed on the upper side of the shield frame base (6), and a protection net (8) is arranged on the inner side of the protection frame (13).

4. The large mining height face five-shield retreating support according to claim 1, characterized in that: First push-pull rods are installed between the exterior retracting support (1) and the first rotating support (3) through a shaft, and second push-pull rods are installed between the first rotating support (3) and the second rotating support (4) through a shaft.

5. The large mining height face five-shielded retracement support according to claim 1, characterized in that: Rollers (18) are arranged on the lower side of the shield frame base (6), and anti-skid protrusions (14) are uniformly arranged on the surface of the shield frame base (6).

6. The large mining height face five-shield retreating support according to claim 1, characterized in that: Sliding blocks (21) are fixedly installed on the left and right sides of the second connecting frame (20), and clamping blocks (22) are arranged on the front side of the sliding blocks (21).

7. The large mining height face five-shield retreating support according to claim 6, characterized in that: A sliding groove (16) corresponding to the sliding blocks (21) is formed in the inner side of the shield frame base (6), and clamping holes corresponding to the clamping blocks (22) are formed in the inner side of the sliding groove (16).

8. The large mining height face five-shield retreating support according to claim 1, characterized in that: Fixed bolts (19) are detachably installed on the outer sides of the first connecting frame (15) and the second connecting frame (20), and threads are arranged on the two sides of the fixed bolts (19).

9. The large mining height face five-shield retreatable support according to claim 8, characterized in that: The pulleys (17) are arranged on the outer sides of the fixed bolts (19), and nuts (9) are arranged on the outer sides of the fixed bolts (19).

10. The large mining height face five-shield retreatable support according to claim 1, characterized in that: The protection plate (12) is fixedly installed on the upper side of the shield frame base (6), and the protection plate (12) is provided with three groups.

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