Flexible gate type hydraulic support for steeply inclined coal seam

Abstract

A flexible gate type hydraulic support for a steeply inclined coal seam comprises an upper supporting leg, a lower supporting leg, a long top beam, a short top beam and a supporting jack, the upper end of the upper supporting leg is hinged to the first end of the long top beam, the second end of the long top beam is hinged to the first end of the short top beam, and the second end of the short top beam is hinged to the upper end of the lower supporting leg. The supporting jack is hinged between the upper supporting leg and the lower supporting leg, an outrigger jack is further hinged between the upper supporting leg and the long top beam, a connecting rod is further hinged between the long top beam and the lower supporting leg, the upper supporting leg and the lower supporting leg are each of a box structure with the lower end open, and telescopic supporting legs extending downwards are arranged in the upper supporting leg and the lower supporting leg in a sliding mode. And stable anti-skid modules are arranged on the upper supporting legs and the lower supporting legs. The hydraulic support can effectively support a top plate and a bottom plate of a working face, provides sufficient safety space for personnel and mechanical mining equipment to work on the lower portion of the hydraulic support, is stable and anti-skid, does not need to be disassembled and assembled in the advancing process of the working face, and is high in working efficiency and low in labor intensity.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic supports, and specifically, to a flexible gantry hydraulic support for steeply inclined coal seams. Background Art

[0002] A steeply inclined coal seam refers to a coal seam with a dip angle greater than 45° during underground mining. Among them, for coal seams with a larger dip angle in steeply inclined coal seams, especially coal seams with a dip angle above 80°, for coal seams with a thickness of more than 20m, a short-arm top coal caving face can be arranged and mechanically mined by a single rocker-arm shearer. For thin coal seam working faces with a thickness of less than 3m, manual blasting mining is mostly used, with single props cooperating with flexible shield hydraulic supports to support the roof and floor. Workers work under the support. The support descends and moves by itself relying on the gravity of the upper rock. During the advancement of the working face, it is necessary to frequently disassemble and assemble the support. There are problems such as a narrow space, a small effective ventilation section, high labor intensity of workers, and low mining efficiency in the coal mining working face. At the same time, the blasting coal falling process technology is backward and the safety risk is high, which is a mining method about to be eliminated. For medium-thick coal seams with a thickness of less than 10m, blasting mining is mostly used, cooperating with single props, and horizontal sectional mining is adopted, which has problems such as low mining efficiency, high labor intensity, and high danger coefficient. So far, there is no effective mechanized mining method and mining support equipment.

[0003] At present, a bottom-climbing shearer is also used for coal cutting. Although mechanized mining can be achieved, the mining efficiency is not high, and there are still problems such as the need to frequently disassemble and assemble the support during the advancement of the working face.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention

[0005] The purpose of the utility model is to aim at the deficiencies of the prior art, and thus provide a flexible gantry hydraulic support for steeply inclined coal seams. The hydraulic support of the utility model has an overall "umbrella"-shaped gantry structure. Under the action of the support jacks, it can effectively support the roof and floor of the working face, providing an ample and safe space for personnel and mechanized mining equipment to work under the hydraulic support, with stable anti-slip performance. During the advancement of the working face, there is no need to disassemble and assemble the support. The electro-hydraulic control realizes the lowering of the support and side adjustment, with high operation efficiency and low labor intensity.

[0006] To achieve the above object, the technical solution adopted by the utility model is as follows: a flexible gantry hydraulic support for steeply inclined coal seams, which includes an upper leg, a lower leg, a long roof beam, a short roof beam and a support jack. The upper leg is placed on one side of the working face roof to support the working face roof, and the lower leg is placed on one side of the working face floor to support the working face floor. The upper end of the upper leg is hinged to the first end of the long roof beam, the second end of the long roof beam is hinged to the first end of the short roof beam, and the second end of the short roof beam is hinged to the upper end of the lower leg. The upper leg, the long roof beam, the short roof beam and the lower leg make the hydraulic support as a whole into an "umbrella"-shaped gantry structure. The support jack is hinged between the upper leg and the lower leg. There is also a cantilever jack hinged between the upper leg and the long roof beam. There is also a connecting rod located below the short roof beam hinged between the long roof beam and the lower leg. The long roof beam, the short roof beam, the lower leg and the connecting rod form a double-crank four-bar mechanism. Both the upper leg and the lower leg are box structures with open lower ends. Telescopic legs extending downward are slidably arranged inside both the upper leg and the lower leg. Leg telescopic jacks connected to the corresponding telescopic legs and driving the corresponding telescopic legs to slide are installed on the opposite side surfaces of the upper leg and the lower leg. A stable anti-slip module is arranged on the upper leg and the lower leg.

[0007] Based on the above, side guard plates are arranged on the upper leg, the lower leg, the long roof beam and the short roof beam.

[0008] Based on the above, the stable anti-slip module includes anti-slip strips, and several anti-slip strips are arranged at intervals up and down on the opposite side surfaces of the upper leg and the lower leg.

[0009] Based on the above, the stable anti-slip module further includes a first stable jack and a second stable jack; the cylinder body of the first stable jack is fixedly embedded through the middle part on the upper side of the upper leg, the open end of the cylinder body of the first stable jack is far away from the lower leg and is placed on one side of the upper leg facing away from the lower leg, and the extending end of the piston rod of the first stable jack is coaxially and fixedly provided with a first tip.

[0010] The cylinder body of the second stable jack is fixedly embedded through the middle part on the upper side of the lower leg, the open end of the cylinder body of the second stable jack is far away from the upper leg and is placed on one side of the lower leg facing away from the upper leg, and the extending end of the piston rod of the second stable jack is coaxially and fixedly provided with a second tip.

[0011] The utility model has substantial features and progress compared with the prior art. Specifically, the upper leg, long roof beam, short roof beam and lower leg of the utility model make the overall structure of the hydraulic support into an "umbrella"-shaped portal structure. Through the extension of the support jacks, the upper leg and the lower leg can effectively support the working face roof and floor respectively, providing an ample safety space for personnel and mechanized mining equipment to work under the hydraulic support. Among them, telescopic legs are slidably arranged inside the upper leg and the lower leg. Under the action of the leg telescopic jacks, the telescopic legs can support on the coal seam to provide auxiliary support force. And after the shearer cuts the coal, the telescopic legs are timely extended through the leg telescopic jacks for gangue sealing and providing auxiliary support force. During the advancement of the working face, auxiliary lowering of the support is realized through electro-hydraulic control. Specifically, the control valve group or remote control is operated to control the pressure relief of the support jacks, and at the same time, the two leg telescopic jacks are controlled to retract synchronously. Then, under the action of the upper rock and the self-weight of the hydraulic support, the hydraulic support moves downward to lower the support. The whole process does not require disassembling and assembling the support, with high operation efficiency and low labor intensity.

[0012] Further, the long roof beam, short roof beam, lower leg and connecting rod form a double-crank four-bar mechanism. This double-crank four-bar mechanism can increase the stability of the hydraulic support and at the same time reduce the height difference between the upper leg and the lower leg when adjusting the width of the hydraulic support, so as to better transmit the support force.

[0013] Further, side guard plates are arranged on the upper leg, lower leg, long roof beam and short roof beam, which can be used for gangue sealing in the gap between adjacent hydraulic supports and adjusting the attitude of the hydraulic support to achieve side adjustment and prevent the hydraulic support from tipping over.

[0014] Further, to prevent the hydraulic support from sliding when supporting the working face roof and floor, a number of anti-slip strips are arranged at intervals up and down on the opposite side surfaces of the upper leg and the lower leg, which can increase the friction between the hydraulic support and the working face roof and floor. At the same time, a first stabilizing jack is arranged in the middle of the upper side of the upper leg, and a second stabilizing jack is arranged in the middle of the upper side of the lower leg. After the hydraulic support is adjusted in place, the first tip is inserted into the working face roof under the push of the first stabilizing jack, and the second tip is inserted into the working face floor under the push of the second stabilizing jack, playing a role in stabilizing and anti-sliding for the hydraulic support. When the hydraulic support is lowered, the first stabilizing jack and the second stabilizing jack are retracted. Description of the Drawings

[0015] Figure 1 is the sectional view of the working face layout of the utility model.

[0016] Figure 2 is the schematic diagram of the working state of the utility model.

[0017] Figure 3 is the schematic diagram of the retracted state of the utility model.

[0018] Figure 4 is Figure 2 the left view of

[0019] In the figure: 1. upper leg; 2. lower leg; 3. long top beam; 4. short top beam; 5. support jack; 6. roof; 7. floor; 8. cantilever jack; 9. connecting rod; 10. telescopic leg; 11. leg telescopic jack; 12. side guard plate; 13. anti-slip strip; 14. first stabilizing jack; 15. second stabilizing jack; 16. first tip; 17. second tip. Specific embodiments

[0020] The technical solution of the present utility model will be further described in detail below through specific embodiments.

[0021] As Figures 1 to 4 shown, a flexible gantry hydraulic support for steeply inclined coal seams includes an upper leg 1, a lower leg 2, a long top beam 3, a short top beam 4, and a support jack 5. The upper leg 1 is placed on one side of the working face roof 6 and supports the working face roof 6. The lower leg 2 is placed on one side of the working face floor 7 and supports the working face floor 7. The upper end of the upper leg 1 is hinged to the first end of the long top beam 3. The second end of the long top beam 3 is hinged to the first end of the short top beam 4. The second end of the short top beam 4 is hinged to the upper end of the lower leg 2. The upper leg 1, the long top beam 3, the short top beam 4, and the lower leg 2 form an "umbrella"-shaped gantry structure as a whole for the hydraulic support. The support jack 5 is hinged between the upper leg 1 and the lower leg 2. A cantilever jack 8 is also hinged between the upper leg 1 and the long top beam 3. A connecting rod 9 is also hinged between the long top beam 3 and the lower leg 2 and is located below the short top beam 4. The long top beam 3, the short top beam 4, the lower leg 2, and the connecting rod 9 form a double-crank four-bar linkage mechanism. Both the upper leg 1 and the lower leg 2 are box structures with open lower ends. Telescopic legs 10 that extend downward are slidably arranged inside both the upper leg 1 and the lower leg 2. Leg telescopic jacks 11 that are connected to the corresponding telescopic legs 10 and drive the corresponding telescopic legs 10 to slide are installed on the opposite side surfaces of the upper leg 1 and the lower leg 2. A stable anti-slip module is provided on the upper leg 1 and the lower leg 2.

[0022] The working principle of this embodiment is as follows: Through electro-hydraulic control, the support jack 5 extends, and the support jack 5 tightly supports the upper leg 1 and the lower leg 2 against the working face roof 6 and the floor 7 respectively. The upper leg 1, the long roof beam 3, the short roof beam 4, and the lower leg 2 form an umbrella-shaped gantry structure for the hydraulic support as a whole, effectively supporting the working face roof 6 and the floor 7. The rock above the hydraulic support presses on the long roof beam 3 and the short roof beam 4, which can provide an ample safety space for personnel and mechanized mining equipment to work under the hydraulic support. At the same time, the telescopic legs 10 at the lower ends of the upper leg 1 and the lower leg 2 can support on the coal seam under the action of the leg telescopic jack 11 to provide auxiliary support force. During the advancement of the working face, auxiliary lowering of the support is achieved through electro-hydraulic control. Specifically, operate the control valve group or the remote control to control the pressure relief of the support jack 5, and at the same time control the two leg telescopic jacks 11 to retract synchronously. Then, under the action of the gravity of the upper rock and the hydraulic support itself, the hydraulic support moves downward to lower the support. The whole process does not require disassembling and assembling the support, with high operation efficiency and low labor intensity.

[0023] The long roof beam 3, the short roof beam 4, the lower leg 2, and the connecting rod 9 form a double-crank four-bar linkage mechanism. This double-crank four-bar linkage mechanism can increase the stability of the hydraulic support and at the same time reduce the height difference between the upper leg 1 and the lower leg 2 during the width adjustment of the hydraulic support to better transmit the support force.

[0024] After the shearer cuts the coal, the telescopic legs 10 are timely extended through the leg telescopic jack 11 to timely seal the gangue and provide auxiliary support force.

[0025] The purpose of the stable anti-slip module is to prevent the hydraulic support from sliding when supporting the working face roof 6 and the floor 7.

[0026] In this embodiment, side guard plates 12 are provided on the upper leg 1, the lower leg 2, the long roof beam 3, and the short roof beam 4. During normal operation, the side guard plates 12 are in the ejected state for sealing the gangue in the gap between adjacent hydraulic supports. When the hydraulic support is tilted, through electro-hydraulic control, the side push jacks inside the hydraulic support are controlled to act, so that the side guard plates 12 move outward to adjust the posture of the hydraulic support and achieve side adjustment to prevent the hydraulic support from tipping over.

[0027] In this embodiment, the stable anti-slip module includes anti-slip strips 13. A number of anti-slip strips 13 are arranged (welded) at intervals up and down on the opposite side surfaces of the upper leg 1 and the lower leg 2. The anti-slip strips 13 can increase the friction between the hydraulic support and the working face roof 6 and the floor 7 to prevent the hydraulic support from sliding.

[0028] In this embodiment, the stable anti-slip module further includes a first stable jack 14 and a second stable jack 15; the cylinder block of the first stable jack 14 is fixedly embedded through the middle part of the upper side of the upper leg 1, the open end of the cylinder block of the first stable jack 14 is far away from the lower leg 2 and is placed on one side of the upper leg 1 facing away from the lower leg 2, and a first tip 16 is coaxially and fixedly arranged at the extending end of the piston rod of the first stable jack 14;

[0029] The cylinder block of the second stable jack 15 is fixedly embedded through the middle part of the upper side of the lower leg 2, the open end of the cylinder block of the second stable jack 15 is far away from the upper leg 1 and is placed on one side of the lower leg 2 facing away from the upper leg 1, and a second tip 17 is coaxially and fixedly arranged at the extending end of the piston rod of the second stable jack 15.

[0030] On the basis of the anti-slip strip 13, when the hydraulic support is adjusted in place, the first tip 16 is inserted into the working face roof 6 under the push of the first stable jack 14, and the second tip 17 is inserted into the working face floor 7 under the push of the second stable jack 15, playing a role in stabilizing and anti-slip for the hydraulic support. When the hydraulic support is lowered, the first stable jack 14 and the second stable jack 15 are retracted.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A steeply inclined coal seam flexible portal hydraulic support, characterized in that: The hydraulic support comprises an upper leg, a lower leg, a long top beam, a short top beam and a supporting jack. The upper leg is placed on one side of the top plate of the working surface and supports the top plate of the working surface. The lower leg is placed on one side of the bottom plate of the working surface and supports the bottom plate of the working surface. The upper end of the upper leg is hinged to the first end of the long top beam, the second end of the long top beam is hinged to the first end of the short top beam, and the second end of the short top beam is hinged to the upper end of the lower leg. The upper leg, the long top beam, the short top beam and the lower leg make the hydraulic support form an "umbrella" shaped door structure as a whole. The supporting jack is hinged between the upper leg and the lower leg. The upper leg is hinged to the long top beam. A cantilever beam jack is hinged between the top beams, and a connecting rod located below the short top beam is hinged between the long top beam and the lower leg. The long top beam, the short top beam, the lower leg and the connecting rod form a double-link four-bar linkage mechanism. The upper leg and the lower leg are both box structures with open lower ends. Telescopic legs extending downward are slidably arranged inside the upper leg and the lower leg. Leg telescopic jacks connected to the corresponding telescopic legs and driving the corresponding telescopic legs to slide are installed on the opposite sides of the upper leg and the lower leg. Stable and anti-slip modules are provided on the upper leg and the lower leg.

2. The steeply inclined coal seam flexible portal hydraulic support according to claim 1 is characterized in that: The upper legs, the lower legs, the long top beam and the short top beam are all provided with side guard plates.

3. The steeply inclined coal seam flexible portal hydraulic support according to claim 1, characterized in that: The stable and anti-skid module comprises anti-skid strips, and a plurality of anti-skid strips are arranged at intervals on the opposite sides of the upper supporting leg and the lower supporting leg.

4. The steeply inclined coal seam flexible portal hydraulic support according to claim 3 is characterized in that: The stabilizing and anti-skid module also includes a first stabilizing jack and a second stabilizing jack; the cylinder of the first stabilizing jack is fixedly embedded in the middle of the upper side of the upper leg, the open end of the cylinder of the first stabilizing jack is away from the lower leg and is placed on a side of the upper leg facing away from the lower leg, and the extended end of the piston rod of the first stabilizing jack is coaxially fixedly provided with a first top; The cylinder of the second stabilizing jack is fixedly embedded in the middle of the upper side of the lower leg, the open end of the cylinder of the second stabilizing jack is away from the upper leg and is placed on a side of the lower leg facing away from the upper leg, and the extended end of the piston rod of the second stabilizing jack is coaxially fixed with a second top.

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