CN-121719585-B - Guniting machine for reinforcing coal mine return tunnel

CN121719585BCN 121719585 BCN121719585 BCN 121719585BCN-121719585-B

Abstract

The invention discloses a guniting machine for reinforcing a coal mine return tunnel, belonging to the technical field of guniting machines; the slurry spraying machine comprises a mixing hopper, a mixing cover and a quantitative material distributing seat which are sequentially connected from top to bottom, wherein the mixing cover and the quantitative material distributing seat form a two-stage gas injection structure, compressed air is injected in the slurry mixing stage to enable the interior of the slurry to form bubbles so as to improve the mixing effect of raw materials of each component in the slurry and improve the fluidity of the slurry, the wall hanging condition of the slurry in the device is reduced, the injection of the compressed air is realized in the mixing stage and the conveying stage by adopting the two-stage gas injection structure, the compressed air in the two stages is respectively used for improving the mixing effect of the slurry and the fluidity of the slurry, so that the blocking probability of equipment is effectively reduced, the continuous supply of the slurry is ensured, and the problem that the slurry spraying machine is easy to block in the process of spraying slurry in a coal mine tunnel is solved.

Inventors

WANG FENG
XU HUIGANG
LIU CHONG
LIU WENWEI
WANG LEI
REN ZHUANG
ZHAO FUXING
GUANG LIXIN

Assignees

山西新元煤炭有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260227

Claims (8)

1. The utility model provides a slurry spraying machine for reinforcing coal mine return air roadway, which is characterized by comprising a mixing hopper (2), a mixing cover (3) and a quantitative material distributing seat (4) which are sequentially connected from top to bottom, wherein the mixing cover (3) is provided with a cavity communicated with the mixing hopper (2), the bottom end of the cavity is penetrated and provided with a through groove (32), the outer side wall of the mixing cover (3) is fixedly provided with an extension cover (31), the middle part of the extension cover (31) is penetrated and provided with a water guide groove (311), the inside of the mixing cover (3) is provided with a communication groove (312), the lower surface of the mixing cover (3) is provided with a water outlet groove (313), the water guide groove (311), the communication groove (312) and the water outlet groove (313) are sequentially communicated, the bottom end of the extension cover (31) is fixedly provided with a piston chamber (315), the top end of the piston chamber (315) is communicated with the water guide groove (311), the inside of the piston chamber (315) is slidingly provided with a piston head (3151), and the top end of the inner side wall of the piston chamber (315) is penetrated and provided with an air inlet groove (3152). The middle part of guiding gutter (311) is fixed and is provided with branch water stand (314), the inside of branch water stand (314) is equipped with two symmetrical distribution's L-shaped groove (3141), two the top of L-shaped groove (3141) communicates with the inside both ends of guiding gutter (311) respectively, two the bottom of L-shaped groove (3141) is all fixed mounting has check valve (3142), two check valve (3142) all communicate with the inside of piston room (315), and the opposite direction of two check valves (3142), two L-shaped groove (3141) and two check valves (3142) have constituteed guiding gutter (311), the one-way water supply structure in piston room (315); The quantitative material distributing seat (4) is characterized in that the top end of the quantitative material distributing seat (4) is rotationally connected with a connecting seat (41), the connecting seat (41) is fixedly arranged at the bottom end of the material mixing cover (3), a trough (411) matched with the through groove (32) is penetrated and arranged in the middle of the connecting seat (41), the bottom end of the quantitative material distributing seat (4) is rotationally provided with a supporting seat (42), the through groove (32) and the trough (411) are of arc structures, a plurality of transferring grooves are circumferentially arranged in the quantitative material distributing seat (4), and the cross-sectional areas of the through groove (32) and the trough (411) are larger than the cross-sectional areas of the transferring grooves; The lower surface of the supporting seat (42) is provided with a discharging pipe (421) in a penetrating way, the bottom end of the discharging pipe (421) is fixedly connected with a guniting pipe (422), the guniting pipe (422) is a bendable rubber hose, and the end part of the guniting pipe is provided with a metal nozzle for guiding mortar to spray out.
2. The slurry spraying machine for reinforcing a coal mine return roadway according to claim 1, wherein a connecting rod (3153) is rotatably connected to the bottom end of a piston head (3151), the connecting rod (3153) is located in a piston chamber (315), a crank (3154) is rotatably connected to the bottom end of the connecting rod (3153) through a pin shaft, a driving motor (3155) is fixedly arranged at the bottom end of the outer side of the piston chamber (315), an output shaft of the driving motor (3155) penetrates through the bottom end of the piston chamber (315) and is fixedly connected with the middle part of the crank (3154), and the driving motor (3155), the crank (3154) and the connecting rod (3153) form a power source of the piston head (3151).
3. The grouting machine for reinforcing a coal mine return tunnel according to claim 1, wherein an annular air groove (3131) is formed in the mixing cover (3), the axis of the annular air groove (3131) coincides with the axis of the water outlet groove (313), a plurality of secondary air holes (3132) are formed in the inner side wall of the annular air groove (3131) in a surrounding mode, the plurality of secondary air holes (3132) are communicated with the water outlet groove (313), and the secondary air holes (3132) are used for secondary air injection into primarily mixed mortar to accelerate the flow of the mortar.
4. A slurry spraying machine for reinforcing a coal mine return air roadway according to claim 3, wherein an annular baffle (3133) is fixedly arranged at the bottom end of the inner side wall of the water outlet groove (313), the annular baffle (3133) is positioned at the outer side of the secondary air hole (3132), the cross section of the annular baffle (3133) is in a shape of' and a plurality of square air grooves (3134) are formed in the bottom end of the annular baffle (3133) in a surrounding mode, and the annular baffle (3133) is used for limiting mortar to block the secondary air hole (3132).
5. A grouting machine for reinforcing a coal mine return air roadway according to claim 3, further comprising an air compressor (12), wherein the outer sides of the annular air groove (3131) and the air inlet groove (3152) are fixedly provided with air ducts, the air ducts are communicated with the output end of the air compressor (12), and a one-way air valve is arranged between the air ducts and the air compressor (12).
6. The grouting machine for reinforcing a coal mine return tunnel according to claim 1, wherein one end of the extension cover (31) is fixedly provided with a primary water pipe (3111), the primary water pipe (3111) is communicated with the water guide groove (311), the middle part of the discharge pipe (421) is fixedly provided with a secondary water pipe (423), the secondary water pipe (423) is communicated with the inside of the discharge pipe (421), and the other ends of the primary water pipe (3111) and the secondary water pipe (423) are both communicated with the water tank (11).
7. The slurry spraying machine for reinforcing a coal mine return tunnel according to claim 6, further comprising a crawler base (1), wherein the mixing hopper (2) is fixed on the crawler base (1) through a plurality of detachable upright posts, and the water tank (11) and the air compressor (12) are directly fixed above a main body bracket of the crawler base (1) in a bolt fastening mode.
8. The slurry spraying machine for reinforcing the coal mine return tunnel according to claim 1 is characterized in that a power main shaft (43) is rotatably connected to the middle of a supporting seat (42), the power main shaft (43) penetrates through a quantitative material distributing seat (4), a material mixing cover (3) and a material mixing hopper (2), stirring blades (44) are fixedly arranged at the top end of the power main shaft (43) and are positioned in the material mixing hopper (2), the middle of the power main shaft (43) is fixedly connected with the quantitative material distributing seat (4), a power motor (431) is fixedly arranged below the supporting seat (42), and an output shaft of the power motor (431) is in transmission connection with the bottom end of the power main shaft (43).

Description

Guniting machine for reinforcing coal mine return tunnel Technical Field The invention belongs to the technical field of guniting machines, and particularly relates to a guniting machine for reinforcing a coal mine return tunnel. Background The gunite support is a key technology for reinforcing underground coal mine roadways. In a special operation environment of a coal mine return tunnel, equipment faces serious challenges such as narrow space, air humidity, high gas dust concentration and the like. Traditional spraying machines, especially equipment for wet spraying processes, have a long standing point of pain during operation, and mixed mortar tends to wall built-up, deposit and scale on the internal conveying path of the equipment, eventually leading to blockage of the flow channels. The blockage is mainly caused by the fact that firstly, in order to meet the pumping and spraying requirements, the guniting mortar is usually designed into a high-concentration and high-viscosity state, the inherent adhesiveness is strong, secondly, under the condition that materials are not fully mixed, cement particles cannot be fully dispersed and coated with aggregate to form a local block with higher adhesiveness, furthermore, the underground environment temperature can be low, and moreover, the equipment is not thoroughly cleaned in time when the equipment is stopped, the solidification and the adhesion of the mortar are accelerated, and finally the equipment is frequently blocked. Disclosure of Invention The invention overcomes the defects of the prior art, provides a guniting machine for reinforcing a coal mine return tunnel, and solves the problem that the guniting machine is easy to block in the process of guniting a coal mine underground tunnel. The invention is realized by the following technical scheme: The utility model provides a colliery return air roadway consolidates and uses guniting machine, includes mixing hopper, compounding cover and quantitative branch material seat that connects gradually from top to bottom, the compounding cover is equipped with the appearance chamber that communicates with the compounding hopper, and the bottom of appearance chamber runs through and is equipped with logical groove, the lateral wall fixed mounting of compounding cover has extension cover, the middle part of extension cover runs through and is equipped with the guiding gutter, the inside of compounding cover is equipped with the intercommunication groove, the lower surface of compounding cover is equipped with the water outlet tank, guiding gutter, intercommunication groove and water outlet tank are linked together in proper order, the bottom fixed mounting of extension cover has the piston room, and the top and the guiding gutter intercommunication of piston room, the inside slip of piston room is provided with the piston head, the inside wall top of piston room runs through and is equipped with the air inlet tank; The quantitative material distributing seat is characterized in that the top end of the quantitative material distributing seat is rotationally connected with a connecting seat, the connecting seat is fixedly arranged at the bottom end of the material mixing cover, a trough matched with the through trough is penetrated in the middle of the connecting seat, the bottom end of the quantitative material distributing seat is rotationally provided with a supporting seat, the through trough and the trough are of arc structures, a plurality of transferring troughs are arranged in the quantitative material distributing seat in a surrounding mode, and the cross-sectional areas of the through trough and the trough are larger than the cross-sectional areas of the transferring troughs. Further, the fixed water diversion seat that is provided with in middle part of guiding gutter, the inside of water diversion seat is equipped with two symmetric distribution's L shape grooves, two the top in L shape groove communicates with the inside both ends of guiding gutter respectively, two the equal fixed mounting in bottom in L shape groove has the check valve, two the check valve all communicates with the inside of piston chamber, and the opposite direction of two check valves, two the one-way water supply structure in guiding gutter, the piston chamber has been constituteed to L shape groove and two check valves. Further, the bottom end of the piston head is rotationally connected with a connecting rod, the connecting rod is positioned in the piston chamber, the bottom end of the connecting rod is rotationally connected with a crank through a pin shaft, the bottom end of the outer side of the piston chamber is fixedly provided with a driving motor, an output shaft of the driving motor penetrates through the bottom end of the piston chamber and is fixedly connected with the middle part of the crank, and the driving motor, the crank and the connecting rod form a power source of the piston head. Further, the inside annular ai