CN216841664U - Hydraulic top plate spalling device for coal mine - Google Patents
Hydraulic top plate spalling device for coal mine Download PDFInfo
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- CN216841664U CN216841664U CN202220417418.2U CN202220417418U CN216841664U CN 216841664 U CN216841664 U CN 216841664U CN 202220417418 U CN202220417418 U CN 202220417418U CN 216841664 U CN216841664 U CN 216841664U
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Abstract
The utility model provides a coal mine local roof hydraulic bursting device, which comprises a cylinder body (1), a plunger (2) and a cylinder cover (3); the cylinder body (1) is cylindrical, a plurality of cylinder holes (101) are formed in the cylinder body along the axis, and an upper liquid hole (102), a lower liquid hole (103) and corresponding liquid channels are formed in the cylinder body; the plunger (2) is an integrated structure consisting of a piston (201) and a piston rod (202), each plunger is respectively placed in a cylinder hole (101) of the cylinder body, and the outer diameter of the piston is the same as the inner diameter of the cylinder hole; the middle part of the cylinder cover (3) is provided with a piston rod hole (301), the inner diameter of the piston rod hole is the same as the outer diameter of the piston rod, and the cylinder cover is sleeved outside the piston rod (202) and is in threaded connection with the cylinder body (1). The hydraulic bursting device is placed in a drilled hole of the roof coal rock which is drilled in advance, and when a movable column of the bursting device extends out, the local roof coal rock is extruded to generate cracks and fall off. The utility model provides the high progress of colliery recovery work has established the basis for support safety support in the pit.
Description
Technical Field
The utility model belongs to the technical field of the colliery and similar field, in particular to local roof spalling ware in colliery.
Background
The roof in the goaf falls along with the advance of the stope face of the coal mine, but the local roof above the crossheading at the two ends of the stope face cannot fall along with the forward movement of the support due to poor fall condition limitation, so that the stress of the support is influenced. The existing hydraulic fracturing method and the carbon dioxide phase change fracturing method both need a reliable hole sealing procedure, and a medium can be scattered into the environment after spalling.
Therefore, how to solve the problem of insufficient roof caving in the goaf is a problem which needs to be solved currently.
Disclosure of Invention
To the problem that exists among the prior art, the utility model aims to provide a local roof spalling ware in colliery adopts the supplementary caving of hydraulic spalling mode.
The utility model aims at realizing through the following technical scheme:
a coal mine local roof hydraulic pressure spalling device comprises a cylinder body, a plunger and a cylinder cover; the cylinder body is cylindrical, a plurality of cylinder holes are formed in the cylinder body along the axis, and an upper liquid hole, a lower liquid hole and corresponding liquid channels are formed in the cylinder body; the movable columns are of an integrated structure consisting of pistons and piston rods, each movable column is placed in a cylinder hole of the cylinder body, and the outer diameter of each piston is the same as the inner diameter of the cylinder hole; the middle part of the cylinder cover is provided with a piston rod hole, the inner diameter of the piston rod hole is the same as the outer diameter of the piston rod, and the cylinder cover is sleeved outside the piston rod and is in threaded connection with the cylinder body.
Furthermore, the piston is provided with a groove, and a piston sealing combination consisting of a sealing ring and a retainer ring is arranged on the groove.
Furthermore, 3 grooves are formed in the cylinder cover, and a dust ring, an inner sealing assembly and an outer sealing assembly are sequentially installed from top to bottom.
Furthermore, a first dismounting hole and a second dismounting hole are respectively formed in the piston rod and the cylinder cover.
Furthermore, the bottom of the piston is of a chamfer structure of 40-50 degrees.
Furthermore, one side of the cylinder body is provided with a hanging ring.
Furthermore, the hydraulic expansion device also comprises a connecting sleeve which is sleeved on one side of the cylinder body and connected with the cylinder body through a screw and used for connecting the two hydraulic expansion devices.
The cylinder body and the piston rod are made of 45# steel, the piston is made of QT450-10 nodular cast iron, and the cylinder cover is made of H59 copper; the connecting sleeve is made of 20# steel.
The utility model discloses compare prior art's beneficial effect does:
the coal mine local roof spalling device adopts a hydraulic spalling mode to assist caving, a plurality of drill holes are drilled at the roof with poor limit of caving conditions, the hydraulic spalling device is placed in the drill holes, and when a movable column of the spalling device extends out, the local roof coal rock is extruded to generate cracks; on one hand, the process of hole sealing is omitted, and on the other hand, the working medium is recycled between the hydraulic pump station and the spalling device, so that the environment is not polluted.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is an external structural schematic diagram of a local roof spaller of a coal mine in example 1;
FIG. 2 is a top view of the local roof spaller of the coal mine of example 1;
FIG. 3 is a cross-sectional view of the coal mine local roof spaller of example 1;
FIG. 4 is an enlarged view of a portion of FIG. 3;
FIG. 5 is an enlarged view of the structure of part I in FIG. 4;
FIG. 6 is an enlarged view of the portion II in FIG. 4;
FIG. 7 is a schematic structural view of the cylinder;
FIG. 8 is a schematic structural view of the cylinder head;
FIG. 9 is a schematic view of the structure of the plunger;
FIG. 10 is a top view of the coal mine local roof spallator with the connecting sleeve added in embodiment 2;
FIG. 11 is a schematic diagram of the use of a coal mine local roof hydraulic breaker;
in the figure, 1-cylinder body, 101-cylinder hole, 102-upper liquid hole, 103-lower liquid hole, 104-lifting ring, 2-plunger, 201-piston, 202-piston rod, 203-piston sealing combination, 204-first dismounting hole, 3-cylinder cover, 301-piston rod hole, 302-outer sealing combination, 303-inner sealing combination, 304-dust ring, 305-second dismounting hole and 4-connecting sleeve.
Detailed Description
Example 1
As shown in fig. 1 to 3, the embodiment provides a coal mine local roof hydraulic bursting device, which comprises a cylinder body 1, a plunger 2 and a cylinder cover 3; as shown in fig. 7, the cylinder body 1 is cylindrical and is made of 45# steel material, 5 cylinder holes 101 are arranged along the axis, an upper liquid hole 102, a lower liquid hole 103 and corresponding liquid channels are arranged on the cylinder body, the right end is closed when the cylinder body is used, when working medium emulsion enters from the left end of the lower liquid hole and returns from the left end of the upper liquid hole, a movable column extends out, and roof coal rocks are cracked; when the emulsion enters from the left end of the upper liquid hole and returns from the left end of the lower liquid hole, the plunger retracts. As shown in fig. 9, the plunger 2 is an integrated structure composed of a piston 201 and a piston rod 202, the piston rod is made of 45# steel material, the piston is made of QT450-10 nodular cast iron material, five plungers 2 are respectively placed in a cylinder hole 101 of the cylinder body, the outer diameter of the piston is the same as the inner diameter of the cylinder hole, and a groove is arranged on the piston 201, and a piston seal combination 203 composed of a seal ring and a retainer ring is arranged, so that the high-pressure liquid and the low-pressure liquid can be prevented from communicating. As shown in fig. 4-6 and 8, the cylinder cover 3 is formed by processing an H59 copper material, a piston rod hole 301 is formed in the middle of the cylinder cover, the inner diameter of the piston rod hole is the same as the outer diameter of the piston rod, the cylinder cover is sleeved outside the piston rod 202 and is in threaded connection with the cylinder body 1, 3 grooves are formed in the cylinder cover, a dust ring 304, an inner sealing combination 303 and an outer sealing combination 302 are sequentially installed from top to bottom, and the inner sealing combination and the outer sealing combination are respectively composed of a sealing ring and a retaining ring. The dust ring 304 prevents external dust from entering the cylinder; the inner sealing combination 303 and the outer sealing combination 302 are arranged to prevent the emulsion in the cylinder from leaking.
The piston rod 202 and the cylinder head 3 are respectively provided with a first dismounting hole 204 and a second dismounting hole 305 for fixing tools when the end cover is dismounted. And a lifting ring 104 is arranged on one side of the cylinder body and used for lifting the spaller.
As shown in fig. 11, a plurality of drill holes are drilled on the local top plate coal rock, a hydraulic bursting device is placed in each drill hole, and is connected with an external hydraulic station through a hydraulic pipe, when working medium emulsion enters from the left end of a lower liquid hole 101 and returns from an upper liquid hole 102, a plunger extends out to extrude the local top plate coal rock to generate cracks; when the emulsion enters from the left end of the upper liquid hole 102 and returns from the left end of the lower liquid hole 101, the plunger retracts. In addition, the stroke of the plunger 2 is limited by the cylinder cover 3, and when the plunger reaches the limit position, the liquid inlet and outlet holes are not blocked due to the fact that the 45-degree chamfer angle is formed in the plunger.
When the device is used, the top plate coal rock is stretched out and broken through the movable column, so that cracks are formed around the drill hole, in order to prevent the top plate from falling off in the fracturing process, the hydraulic bursting device falls, one end of the hoisting rope is connected with the hydraulic bursting device, and the other end of the hoisting rope is fixed on the top plate of a non-fracturing area.
Example 2
The coal mine local roof hydraulic bursting device can be used independently or in series, when the coal mine local roof hydraulic bursting device is used in series, the two bursting devices are sequentially connected together by the connecting sleeve 4 and then fixed by the connecting screw, and the lower liquid hole 101 and the upper liquid hole 102 of the two bursting devices are respectively connected by the oil pipe, so that the coal mine local roof hydraulic bursting device can adapt to different length requirements. The connecting sleeve is made of 20# steel.
The other structures of the coal mine local roof hydraulic expander are the same as those of the embodiment 1.
Finally, it should be noted that the above only illustrates the technical solution of the present invention and not by limitation, and although the present invention has been described in detail with reference to preferred arrangements, a person skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (9)
1. The coal mine local roof hydraulic bursting device is characterized by comprising a cylinder body (1), a plunger (2) and a cylinder cover (3); the cylinder body (1) is cylindrical, a plurality of cylinder holes (101) are formed in the cylinder body along the axis, and an upper liquid hole (102), a lower liquid hole (103) and corresponding liquid channels are formed in the cylinder body; the plunger (2) is an integrated structure consisting of a piston (201) and a piston rod (202), each plunger is respectively placed in a cylinder hole (101) of the cylinder body, and the outer diameter of the piston is the same as the inner diameter of the cylinder hole; the middle part of the cylinder cover (3) is provided with a piston rod hole (301), the inner diameter of the piston rod hole is the same as the outer diameter of the piston rod, and the cylinder cover is sleeved outside the piston rod (202) and is in threaded connection with the cylinder body (1).
2. The hydraulic expander according to claim 1, wherein the piston (201) is provided with a groove, and a piston sealing combination (203) consisting of a sealing ring and a retainer ring is arranged on the groove.
3. The hydraulic expander according to claim 1, wherein 3 grooves are arranged on the cylinder cover (3), and a dust ring (304), an inner sealing combination (303) and an outer sealing combination (302) are sequentially arranged from top to bottom.
4. The hydraulic expander according to claim 1, wherein said piston rod (202) and cylinder head (3) are provided with a first disassembly hole (204) and a second disassembly hole (305), respectively.
5. The hydraulic expander according to claim 1, wherein the bottom of the piston (201) is of a 40-50 degree chamfer configuration.
6. The hydraulic expander according to claim 1, wherein one side of the cylinder is provided with a lifting ring (104).
7. The hydraulic bursting device according to any one of claims 1 to 6 further comprising a connecting sleeve (4) which is sleeved on one side of the cylinder body and connected by screws for connecting two hydraulic bursting devices.
8. The hydraulic expander according to any one of claims 1-6, wherein the cylinder (1) and the piston rod (202) are made of 45# steel, the piston (201) is made of QT450-10 nodular cast iron, and the cylinder cover (3) is made of H59 copper.
9. The hydraulic expander according to claim 7, characterized in that the connecting sleeve (4) is of 20# steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220417418.2U CN216841664U (en) | 2022-03-01 | 2022-03-01 | Hydraulic top plate spalling device for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220417418.2U CN216841664U (en) | 2022-03-01 | 2022-03-01 | Hydraulic top plate spalling device for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216841664U true CN216841664U (en) | 2022-06-28 |
Family
ID=82092177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220417418.2U Active CN216841664U (en) | 2022-03-01 | 2022-03-01 | Hydraulic top plate spalling device for coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216841664U (en) |
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2022
- 2022-03-01 CN CN202220417418.2U patent/CN216841664U/en active Active
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