Width-variable support for head and tail of fully mechanized coal mining face

Abstract

The invention provides a variable-width support for a head and a tail of a fully mechanized coal mining face. The variable-width support comprises a fixed supporting assembly, a movable supporting assembly and a width adjusting device. The width adjusting device is hinged between the fixed supporting assembly and the movable supporting assembly and used for driving the movable supporting assembly to swing around the fixed supporting assembly in a sector mode through stretching and folding of the width adjusting device so as to change the position of the movable supporting assembly. The distance between the fixed supporting assembly and the movable supporting assembly is changed; top waste rock blocking plates are movably arranged on the top of the fixed supporting assembly and the top of the movable supporting assembly correspondingly. The variable-width support for the head and the tail of the fully mechanized coal mining face can conveniently and quickly adjust the support width of a roadway roof, improves the adaptability of a hydraulic support to an underground environment, and ensures safe and efficient propulsion of the working face.

Description

Technical Field

[0001] The invention relates to the field of coal mine support equipment, and in particular to a variable width bracket used for the head and tail of a fully mechanized mining face machine. Background Art

[0002] In coal mining, end hydraulic supports are usually arranged in the tunnels at both ends of the working face. The end hydraulic supports mainly include top beams, shield beams, bases, front and rear connecting rods, columns, etc. Side guard plates are arranged on the outside of the top beams. The side guard plates mainly play the role of auxiliary support and adjusting the posture of adjacent frames to prevent the roof from caving or leaking gangue and injuring the workers below. However, the stroke of the existing side guard plates is generally small. When the tunnel size changes during the advancement of the working face or the working face equipment rises and slides, the distance between the end support and the tunnel auxiliary wall will change greatly, resulting in the inability to effectively support the tunnel roof, causing safety hazards. The traditional operation method is to add an end support at one end to support the roof when the empty top distance is large, and then remove the support when the distance is small. Due to the narrow working space of the tunnel, this is time-consuming and labor-intensive.

[0003] The invention patent application with application publication number CN118375457A discloses a top-wall integrated variable width bracket type temporary support device and its use method, including a top beam for supporting the top of the tunnel, a top beam aileron components for expanding the top protection area are slidably connected to the front and rear sides of the top beam, and the left and right sides of the top beam are respectively hinged with sub-beam components for supporting the shoulder coal wall of the tunnel, and the sub-beam components are respectively movably connected with shoulder guard components and side guard components from top to bottom, and the bottoms of the two sub-beam components are hinged with support components with side guard and support functions. The top-wall integrated variable width bracket type temporary support device coordinates the two functions of variable width and strengthening the top wall support effect, adopts the main and sub-beam arrangement mode, and makes the temporary support device adapt to the tunnel section by rotating and widening the sub-beam. The method is simple and effective. Under the coordinated support of the side guard component and the shoulder guard component, the top beam support effect is better, and at the same time, the integrated support effect of the top wall is achieved to ensure the stability of the support. However, this device is a non-standard part and is not an improvement on the existing end hydraulic support. It is not very versatile and does not have the function of adapting to the ups and downs of the tunnel for support. Summary of the invention

[0004] In order to facilitate and quickly adjust the support width and support position of the support, improve the adaptability of the support to the underground terrain, improve the flexibility of the support, and ensure the safe and efficient advancement of the working face, the technical solution adopted by the present invention is: a variable width support for the head and tail of the fully mechanized mining working face, including a fixed support component, a mobile support component and a width adjustment device; The width adjustment device is hinged between the fixed support assembly and the movable support assembly, and is used to drive the movable support assembly to swing in a fan shape around the fixed support assembly by extending and folding itself, so as to change the position of the movable support assembly and the distance between the fixed support assembly and the movable support assembly; The top of the fixed support assembly and the top of the movable support assembly are respectively movably provided with a top gangue baffle.

[0005] Based on the above, in order to facilitate swing adjustment, the width adjustment device includes a pair of adjusting cylinders and a pair of adjusting rods; one end of the adjusting rod is hinged to the fixed support assembly, and the other end of the adjusting rod is hinged to the movable support assembly. A piston rod is provided on the adjusting cylinder, and the top of the piston rod is hinged to the adjusting rod, and the other end of the adjusting cylinder is connected to the fixed support assembly.

[0006] Based on the above, in order to enable the mobile support assembly to adapt to the tunnel terrain and adjust up and down, a pair of first connecting ear plates are provided on one side of the bottom of the mobile support assembly, and a U-shaped connecting head is hinged on the first connecting ear plate through a third pin shaft, and the other end of the U-shaped connecting head is hinged to one end of the adjusting rod through a second pin shaft, and the second pin shaft is vertically arranged to the third pin shaft, and the third pin shaft is arranged along the length direction of the mobile support assembly.

[0007] Based on the above, in order to cooperate with the up and down adjustment of the mobile support assembly, a trumpet hole is opened on the top of the piston rod, a first pin is arranged in the trumpet hole, and the piston rod is hinged to the adjustment rod through the first pin.

[0008] Based on the above, a pair of second connecting ear plates are provided on one side of the bottom of the fixed support assembly, and the second connecting ear plate includes two triangular clamps arranged up and down, one end of the adjusting rod is movably connected to one corner of the triangular clamp through a fourth pin shaft, and the cylinder end of the adjusting cylinder is movably connected to the other corner of the triangular clamp through a fifth pin shaft.

[0009] Based on the above, the mobile support assembly includes a mobile unit base, a second hydraulic column, a unit connecting rod and a mobile unit top beam. The second hydraulic column and the unit connecting rod are respectively movably connected between the mobile unit base and the mobile unit top beam, and one end of the adjustment rod is hinged on the mobile unit base.

[0010] Based on the above, in order to expand the support range, a rear barrier plate is provided at the rear end of the mobile unit base.

[0011] Based on the above, the fixed support assembly includes a fixed unit base, a first hydraulic column, a shielding beam and a fixed unit top beam. The first hydraulic column and the shielding beam are respectively movably connected between the fixed unit base and the fixed unit top beam, and one end of the adjusting rod is hinged on the fixed unit base.

[0012] Based on the above, in order to improve the supporting capacity, a side guard plate is provided on the outer side of the top beam of the fixed unit.

[0013] The present invention has outstanding substantive features and significant progress compared to the prior art. Specifically, the variable width bracket for the head and tail of the comprehensive mining face provided by the present invention is formed by movably connecting the mobile support assembly to the fixed support assembly, and designing the mobile support assembly to be composed of a unit base, a unit top beam, a unit column, a unit connecting rod and a rear rock blocking device. A first connecting ear plate, a U-shaped connector and an adjustment rod are hinged on the side of the unit base close to the fixed support portion. The width adjustment device is arranged between the fixed support assembly and the mobile support assembly, with one group each at the front and the back, and the width adjustment device is designed to include components such as an adjustment rod and an adjustment cylinder. Therefore, the adjustment rod and the base can be controlled to swing at an angle of 0 to 135 degrees by adjusting the extension and contraction of the cylinder, driving the position of the mobile support assembly to change accordingly, so that it can adapt to changes in the angle and width of the tunnel, and cooperate with the action of each rock blocking plate to achieve changes in the width of the roof support, thereby realizing a variable width support function.

[0014] Compared with a single telescopic cylinder, the width adjustment device can facilitate the adjustment of the swing and telescopic position of the mobile support assembly on the one hand, and can form a hard-connected structure between the fixed support assembly and the mobile support assembly on the other hand, thereby increasing the stability and structural strength of the bracket.

[0015] Furthermore, the U-shaped connector is hinged to the adjustment rod and the first connection ear plate respectively, and a trumpet hole is opened at the top of the piston rod on the adjustment oil cylinder, so that the variable width bracket has the function of up and down adjustment, so that the mobile support assembly can better adapt to the ups and downs of the bottom plate. At the same time, the top plate support width changes with the action of each baffle plate, realizing the variable width support function.

[0016] Furthermore, top rock-blocking plates are provided on both sides and the front of the unit top beam, which can be opened or retracted by the rock-blocking cylinder. The unit connecting rod is provided on both sides of the unit column, the lower part is hinged to the unit base, and the upper part is hinged to the unit top beam, which is used to improve the anti-torsion ability of the bracket. The rear rock-blocking device is provided at the rear of the unit base, and rear rock-blocking plates are provided on both sides to prevent the rear rock from gushing out.

[0017] Therefore, the variable width bracket used for the head and tail of the fully mechanized mining face can effectively reduce the labor intensity of workers and greatly improve the working efficiency and safety. It also has the advantages of simple structure, easy operation for workers, strong adaptability, low cost, fast installation and removal, and fewer operators, which is conducive to the safe and efficient production of coal mine working faces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the side structure of a variable width bracket for the head and tail of a fully mechanized mining face machine provided by the present invention.

[0019] Figure 2 It is a schematic diagram of the support state of the variable width bracket for the head and tail of the comprehensive mining working face provided by the present invention.

[0020] Figure 3 It is a schematic diagram of the top structure of the variable width bracket for the head and tail of the comprehensive mining working face machine provided by the present invention in an extended state.

[0021] Figure 4 It is a schematic diagram of the bottom structure of the variable width bracket for the head and tail of the comprehensive mining working face machine provided by the present invention in an extended state.

[0022] Figure 5 It is a schematic diagram of the top structure of the variable width bracket for the head and tail of the comprehensive mining working face machine provided by the present invention in a folded state.

[0023] Figure 6 It is a schematic diagram of the bottom structure of the variable width bracket for the head and tail of the comprehensive mining working face machine provided by the present invention in a folded state.

[0024] Figure 7 and Figure 8 It is a schematic structural diagram of a width adjustment device in a variable width bracket for use at the head and tail of a fully mechanized mining face machine provided by the present invention.

[0025] Fig. 9 It is a schematic diagram of the partial structure of the adjusting cylinder in the variable width bracket used for the head and tail of the comprehensive mining working face machine provided by the present invention.

[0026] Fig.10 It is a schematic diagram of the cross-sectional structure of the piston rod in the variable width bracket used for the head and tail of the comprehensive mining working face machine provided by the present invention.

[0027] In the figure: 1. fixed unit base; 2. unit connecting rod; 3. shielding beam; 4. rear rock baffle; 5. fixed support assembly; 6. mobile support assembly; 7. first hydraulic column; 8. second hydraulic column; 9. mobile unit top beam; 10. first top rock baffle; 11. width adjustment device; 12. second top rock baffle; 13. fixed unit top beam; 14. side guard plate; 15. U-shaped connector; 16. adjusting rod; 17. adjusting cylinder; 18. second connecting ear plate; 19. mobile unit base; 20. bottom adjustment beam; 21. first pin shaft; 22. connecting handle; 23. first connecting ear plate; 24. second pin shaft; 25. third pin shaft; 26. fourth pin shaft; 27. fifth pin shaft; 28. piston rod; 29. ​​horn hole. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0029] Example 1 This embodiment provides a variable width bracket for the head and tail of a fully mechanized mining face, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, it comprises a fixed support assembly 5, a movable support assembly 6 and a width adjustment device 11. The width adjustment device 11 is hinged between the fixed support assembly 5 and the movable support assembly 6.

[0030] The width adjustment device 11 is used to drive the mobile support assembly 6 to swing in a fan shape around the fixed support assembly 5 through its own extension and folding, so as to change the position of the mobile support assembly 6 and the distance between the fixed support assembly 5 and the mobile support assembly 6.

[0031] A top rock baffle plate is movably provided on the top of the fixed support assembly 5 and the top of the movable support assembly 6. For the convenience of distinction, they can be respectively recorded as a first top rock baffle plate 10 and a second top rock baffle plate 12.

[0032] Specifically, in order to facilitate the swing adjustment, as Figure 7 , Figure 8As shown, the width adjustment device includes a pair of adjustment cylinders 17 and a pair of adjustment rods 16. One end of the adjustment rod 16 is hinged to the fixed support assembly 5, and the other end of the adjustment rod 16 is hinged to the mobile support assembly 6. The adjustment cylinder 17 is provided with a piston rod 28, the top of the piston rod 28 is hinged to the adjustment rod 16, and the other end of the adjustment cylinder 17 is connected to the fixed support assembly 5. Specifically, the cross section of the adjustment rod 16 is an I-shaped.

[0033] In this embodiment, the mobile support assembly 6 includes a mobile unit base 19, a second hydraulic column 8, a unit connecting rod 2 and a mobile unit top beam 9. The second hydraulic column 8 and the unit connecting rod 2 are respectively movably connected between the mobile unit base 19 and the mobile unit top beam 9, and one end of the adjustment rod 16 is hinged on the mobile unit base 19.

[0034] The fixed support assembly 5 includes a fixed unit base 1, a first hydraulic column 7, a shielding beam 3 and a fixed unit top beam 13. The first hydraulic column 7 and the shielding beam 3 are respectively movably connected between the fixed unit base 1 and the fixed unit top beam 13, and one end of the adjustment rod 16 is hinged on the fixed unit base 1. A bottom adjustment beam 20 is arranged outside the fixed unit base 1 to adapt to the terrain.

[0035] Example 2 This embodiment provides a variable width bracket for the head and tail of a fully mechanized mining face machine. The main difference from Embodiment 1 is that in this embodiment: in order to facilitate the movable connection, a pair of second connecting ear plates 18 are provided on one side of the bottom of the fixed support assembly 5. The second connecting ear plate 18 includes two triangular clamping plates arranged up and down. One end of the adjusting rod 16 is movably connected to one corner of the triangular clamping plate through a fourth pin shaft 26. The cylinder end of the adjusting oil cylinder 17 is movably connected to the other corner of the triangular clamping plate through a fifth pin shaft 27.

[0036] A pair of first connecting lugs 23 are provided at one side of the bottom of the movable support assembly 6, and a U-shaped connector 15 is hingedly connected to the first connecting lug 23 through a third pin 25. A connecting handle 22 is provided at the outer end of the U-shaped connector 15. The connecting handle 22 is hingedly connected to one end of the adjusting rod 16 through a second pin 24. The second pin 24 is arranged perpendicular to the third pin 25, and the third pin 25 is arranged along the length direction of the movable support assembly 6.

[0037] like Fig. 9 and Fig.10 As shown, a trumpet hole 29 is formed at the top of the piston rod 28, and a first pin 21 is disposed in the trumpet hole 29. The piston rod 28 is hinged to the adjusting rod 16 via the first pin 21.

[0038] Example 3 This embodiment provides a variable width bracket for the head and tail of a comprehensive mining face machine. The main difference from Embodiment 1 is that in this embodiment: in order to improve the support capacity, a rear end of the mobile unit base 19 is provided with a rear rock baffle 4.

[0039] Example 4 This embodiment provides a variable width bracket for the head and tail of a comprehensive mining face machine. The main difference from Embodiment 1 is that in this embodiment: in order to improve the supporting capacity, a side guard plate 14 is provided on the outer side of the fixed unit top beam 13.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A variable width bracket for the head and tail of a fully mechanized mining face, characterized in that: It includes a fixed support assembly, a movable support assembly and a width adjustment device; The width adjustment device is hinged between the fixed support assembly and the movable support assembly, and is used to drive the movable support assembly to swing in a fan shape around the fixed support assembly by extending and folding itself, so as to change the position of the movable support assembly and the distance between the fixed support assembly and the movable support assembly; The top of the fixed support assembly and the top of the movable support assembly are respectively movably provided with a top gangue baffle.

2. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 1 is characterized in that: The width adjustment device includes a pair of adjusting cylinders and a pair of adjusting rods; one end of the adjusting rod is hinged to the fixed support assembly, and the other end of the adjusting rod is hinged to the movable support assembly. The adjusting cylinder is provided with a piston rod, the top of the piston rod is hinged to the adjusting rod, and the other end of the adjusting cylinder is connected to the fixed support assembly.

3. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 2 is characterized in that: A pair of first connecting ear plates are provided on one side of the bottom of the movable support assembly, a U-shaped connector is hinged on the first connecting ear plate through a third pin shaft, the other end of the U-shaped connector is hinged to one end of the adjusting rod through a second pin shaft, the second pin shaft is vertically arranged to the third pin shaft, and the third pin shaft is arranged along the length direction of the movable support assembly.

4. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 2 or 3, characterized in that: A trumpet hole is formed at the top of the piston rod, a first pin is arranged in the trumpet hole, and the piston rod is hinged to the adjusting rod via the first pin.

5. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 4 is characterized in that: A pair of second connecting ear plates are provided on one side of the bottom of the fixed support assembly, and the second connecting ear plates include two triangular clamps arranged up and down, one end of the adjusting rod is movably connected to one corner of the triangular clamp through a fourth pin shaft, and the cylinder end of the adjusting cylinder is movably connected to the other corner of the triangular clamp plate through a fifth pin shaft.

6. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 2 or 3, characterized in that: The mobile support assembly includes a mobile unit base, a second hydraulic column, a unit connecting rod and a mobile unit top beam. The second hydraulic column and the unit connecting rod are respectively movably connected between the mobile unit base and the mobile unit top beam, and one end of the adjustment rod is hinged on the mobile unit base.

7. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 6 is characterized in that: A rear baffle plate is arranged at the rear end of the mobile unit base.

8. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 2 or 3, characterized in that: The fixed support assembly includes a fixed unit base, a first hydraulic column, a shielding beam and a fixed unit top beam. The first hydraulic column and the shielding beam are respectively movably connected between the fixed unit base and the fixed unit top beam, and one end of the adjustment rod is hinged on the fixed unit base.

9. The variable width bracket for the head and tail of a fully mechanized mining face according to claim 8 is characterized in that: A side guard plate is arranged on the outer side of the fixing unit top beam.

Images