CN111472826A - Hydraulic prop for caving coal end - Google Patents
Hydraulic prop for caving coal end Download PDFInfo
- Publication number
- CN111472826A CN111472826A CN202010169200.5A CN202010169200A CN111472826A CN 111472826 A CN111472826 A CN 111472826A CN 202010169200 A CN202010169200 A CN 202010169200A CN 111472826 A CN111472826 A CN 111472826A
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- supporting plate
- hydraulic
- hydraulic cylinder
- support
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- 239000003245 coal Substances 0.000 title claims abstract description 51
- 238000005121 nitriding Methods 0.000 claims description 6
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of coal mine equipment, and provides a hydraulic support for a top coal caving end, which comprises a main support plate, wherein a main hydraulic cylinder is arranged below the main support plate; the main hydraulic cylinder is fixed on the base; at least two main hydraulic cylinders are provided; the main hydraulic cylinders are uniformly arranged on the circumference of a virtual circle which takes the center of the main supporting plate as the center of a circle; two sides of the main supporting plate are respectively and rotatably connected with a supporting plate at one side; the side supporting plate is connected with a side hydraulic cylinder for driving the side supporting plate to rotate. Therefore, the main hydraulic cylinder is arranged below the main supporting plate; two sides of the main supporting plate are respectively and rotatably connected with a supporting plate at one side; the side supporting plate is connected with a side hydraulic cylinder for driving the side supporting plate to rotate; when the hydraulic support is used, the main hydraulic cylinder extends out, and the main support plate is lifted; then the side hydraulic cylinder extends out, and the side supporting plates at the two sides are lifted to form support.
Description
Technical Field
The invention belongs to the technical field of coal mine equipment, and particularly relates to a hydraulic support for a top coal caving end.
Background
At present, the working surface of a coal planer is loaded with coal in a resistance mode, namely, the more the coal planed is accumulated in a plough way under the action of forward pushing force of a plough head and coal wall limitation, and the coal pile enters a chute of the coal planer along a plough surface of the plough head to be transported away under the action of pushing force of the plough head when the coal pile reaches a certain height.
In the head and the tail of the coal planer, due to the existence of the crossheading, the space of coal in the planing channel is suddenly enlarged after the coal loses the limit of the coal wall, a part of coal enters the crossheading, and the coal piling phenomenon gradually appears at the head and the tail of the coal planer along with the continuous propulsion of a working face, particularly at the tail part, the coal piling is serious. The end part is a channel for transporting the working face, and the serious coal piling brings inconvenience to the transportation of auxiliary materials of the equipment; meanwhile, the too high coal pile can affect the ventilation clean section of the roadway and is unfavorable for the ventilation of the working face; the coal piling at the head and the tail also increases the local propelling resistance at the end part, thereby influencing the propelling of the equipment.
The traditional coal cleaning method mainly adopts irregular manual coal cleaning, has high labor intensity of workers and low coal cleaning efficiency, and is not beneficial to realizing safe, high-yield and high-efficiency mining of coal mines.
In view of the above, the prior art is obviously inconvenient and disadvantageous in practical use, and needs to be improved.
Disclosure of Invention
Aiming at the defects, the invention aims to provide a hydraulic support for a top coal caving end head, which is characterized in that a main hydraulic cylinder is arranged below a main supporting plate; two sides of the main supporting plate are respectively and rotatably connected with a supporting plate at one side; the side supporting plate is connected with a side hydraulic cylinder for driving the side supporting plate to rotate; when the hydraulic support is used, the main hydraulic cylinder extends out, and the main support plate is lifted; then the side hydraulic cylinder extends out, and the side supporting plates at the two sides are lifted to form support.
In order to achieve the aim, the invention provides a hydraulic support for a top coal caving end, which comprises a main support plate 2, wherein a main hydraulic cylinder 1 is arranged below the main support plate 2; the main hydraulic cylinder 1 is fixed on the base 3; at least two main hydraulic cylinders 1 are provided; the main hydraulic cylinders 1 are uniformly arranged on the circumference of a virtual circle which takes the center of the main supporting plate 2 as the center of a circle;
two sides of the main supporting plate 2 are respectively and rotatably connected with a supporting plate 21 at one side; the side supporting plate 21 is connected with a side hydraulic cylinder 22 for driving the side supporting plate to rotate;
the telescopic part of the side hydraulic cylinder 22 is connected with the side supporting plate 21, and the fixed part is provided with a rotating seat 221; the rotating base 221 is hinged and fixed on the side cylinder bracket 31 of the base 3.
According to the hydraulic prop for the end of the top coal caving, the side cylinder prop 31 is provided with two parallel convex structures, and the rotating seat 221 is clamped between the two convex structures; the two protruding structures are connected with the rotating base 221 through the pin shaft 32.
According to the hydraulic prop for the end of the top coal caving, the diameter of the pin shaft 32 is not less than 30mm, and the pin shaft is subjected to normalizing and surface nitriding treatment.
According to the hydraulic support for the end of the top coal caving head, the number of the main hydraulic cylinders 1 is four, and each main hydraulic cylinder 1 is arranged on four vertexes of an inscribed square of a virtual circle.
According to the hydraulic support for the end of the top coal caving, the number of the main hydraulic cylinders 1 is three, and the three main hydraulic cylinders 1 are respectively positioned on three vertexes of the same virtual triangle; the virtual triangle is an equilateral triangle and is inscribed in the virtual circle.
According to the hydraulic support for the end head of the top coal caving, the number of the main hydraulic cylinders 1 is five, and each main hydraulic cylinder 1 is arranged on five vertexes of an inscribed regular pentagon of the virtual circle.
According to the hydraulic support for the end of the top coal caving head, the bottom of the side supporting plate 21 is also provided with an auxiliary block hydraulic cylinder 24; the auxiliary block hydraulic cylinder 24 is connected with the auxiliary supporting block 23, and the end part of the auxiliary supporting block 23 is provided with a positioning head 231.
According to the hydraulic prop for the top coal caving end, the positioning head 231 is conical in shape.
According to the hydraulic prop for the end head of the top coal caving, the positioning head 231 is made of high alloy steel and is subjected to quenching and tempering and surface nitriding treatment.
According to the hydraulic support for the top coal caving end, the side supporting plate 21 is made of channel steel and has a two-flanging structure; and the auxiliary block hydraulic cylinder 24 is arranged between the two flanging structures.
The invention aims to provide a hydraulic support for a top coal caving end, which is characterized in that a main hydraulic cylinder is arranged below a main supporting plate; two sides of the main supporting plate are respectively and rotatably connected with a supporting plate at one side; the side supporting plate is connected with a side hydraulic cylinder for driving the side supporting plate to rotate; when the hydraulic support is used, the main hydraulic cylinder extends out, and the main support plate is lifted; then the side hydraulic cylinder extends out, and the side supporting plates at the two sides are lifted to form support.
Drawings
FIG. 1 is a schematic structural view of an operating state of the present invention;
FIG. 2 is a schematic view of the structure in the direction A of FIG. 1;
FIG. 3 is a schematic view of the structure in the direction B of FIG. 1;
FIG. 4 is a schematic view of the structure of FIG. 1 in the direction C;
FIG. 5 is a schematic structural view of an operating state of the present invention;
in the figure: 1-main hydraulic cylinder, 2-main supporting plate, 21-side supporting plate, 22-side hydraulic cylinder and 221-rotating seat; 23-auxiliary supporting block, 231-positioning head; 24-auxiliary block hydraulic cylinders; 3-base, 31-side cylinder support, 32-pin shaft.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments, it being understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the invention provides a hydraulic support for a caving coal end, which comprises a main support plate 2, wherein a main hydraulic cylinder 1 is arranged below the main support plate 2; the main hydraulic cylinder 1 is fixed on the base 3; the number of the main hydraulic cylinders 1 is at least two, and enough supporting force is ensured to be propped against the main supporting plate 2. In order to uniformly distribute the pressure of the main support plate 2 to the respective master cylinders 1, further, the master cylinders 1 of the present invention are uniformly arranged on the circumference of a virtual circle centered on the center of the main support plate 2.
As an example, referring to fig. 3, it is preferable that the number of the master cylinders 1 of the present invention is four. Further, the four master cylinders 1 are respectively disposed at four vertices of the same virtual rectangle. The main support plate 2 is supported together so that there is sufficient supporting force. In order to make the stress of each main hydraulic cylinder 1 more uniform, the virtual rectangle is inscribed on a virtual circle taking the center of the main support plate 2 as the center of circle. Preferably, the virtual rectangle is a square.
As an embodiment, there may be three master cylinders 1, and the three master cylinders 1 are located at three vertices of the same virtual triangle respectively. Furthermore, the virtual triangle is an equilateral triangle and is inscribed in the virtual circle.
As an embodiment, the number of the master cylinders 1 of the present invention may be five. As described above, each master cylinder 1 is disposed at five vertices of an inscribed regular pentagon of the virtual circle.
As an embodiment, the number of the main hydraulic cylinders 1 of the present invention can be n, wherein n is greater than or equal to 6. As described above, each master cylinder 1 is provided on the inscribed regular n-polygon of the virtual circle.
In order to increase the supporting area, the method is suitable for different roadway working conditions. Furthermore, two sides of the main supporting plate 2 of the invention are respectively connected with a side supporting plate 21 in a rotating way; the side support plate 21 is connected with a side hydraulic cylinder 22 for driving the side support plate to rotate.
Referring to fig. 4, the telescopic part of the side hydraulic cylinder 22 is connected to the side support plate 21, and the fixed part is provided with a rotating seat 221; the rotating base 221 is hinged and fixed on the side cylinder bracket 31 of the base 3. Preferably, in order to increase the supporting strength, the side cylinder bracket 31 has two parallel convex structures, and the rotating seat 221 is sandwiched between the two convex structures; the two protruding structures are connected with the rotating seat 221 in a penetrating manner through a pin shaft 32; the rotary connection of the two is realized.
Preferably, the diameter of the pin shaft 32 is not less than 30 mm; the hydraulic cylinder has better strength and can bear the pressure of the side hydraulic cylinder 22;
further, the pin shaft 32 is made of high alloy steel and is subjected to normalizing treatment; the hydraulic cylinder has better rigidity, and the phenomenon that the hydraulic cylinder is blocked and the rotation of the side hydraulic cylinder 22 is influenced due to the deformation of the hydraulic cylinder in the rotation process is avoided.
Further, the pin shaft 32 is subjected to surface nitriding treatment, so that the pin shaft has good wear resistance. Under the working conditions of multi-frequency rotation and high pressure bearing, the abrasion phenomenon can not occur. Ensuring a high fatigue life of the pin 32 and reducing the number of maintenance and replacement.
Referring to fig. 2, as an embodiment, the bottom of the side support plate 21 of the present invention is further provided with an auxiliary block hydraulic cylinder 24; the auxiliary block hydraulic cylinder 24 is connected with the auxiliary supporting block 23, and the end part of the auxiliary supporting block 23 is provided with a positioning head 231.
During the use, the flexible portion of assisting a pneumatic cylinder 24 promotes supplementary supporting shoe 23 and stretches out, makes locating head 231 top on the lateral wall of tunnel, increases holistic stability. The positioning head 231 is preferably conical or frustoconical in shape, with the head having a pointed configuration. Can be inserted into the side wall of the roadway to increase the stability.
Furthermore, the positioning head 231 is made of high alloy steel, has high strength, and is pushed against the side wall of the roadway with high strength.
Preferably, the positioning head 231 is subjected to thermal refining; the positioning head 231 is prevented from being clamped on the side wall due to deformation in the jacking process, so that the normal use of the equipment is prevented from being influenced.
Furthermore, the positioning head 231 is subjected to surface nitriding treatment, so that the positioning head has good wear resistance. The surface cracking phenomenon can not occur in the process of penetrating into and pulling out the side wall for multiple times. The positioning head 231 is ensured to have a longer fatigue life, and the maintenance and replacement times are reduced.
The side support plate 21 of the invention has two flanging structures, and the auxiliary block hydraulic cylinder 24 is arranged between the two flanging structures. Further, the side supporting plate 21 is made of channel steel.
When the invention is used, the main hydraulic cylinder 1 extends out, and the main supporting plate 2 is lifted; then the side hydraulic cylinder 22 is extended, and the side supporting plates 21 at the two sides are lifted to form support.
Referring to fig. 5, after the operation is completed, the main hydraulic cylinder 1 retracts, and the main support plate 2 falls; the side hydraulic cylinders 22 are then retracted and the side support plates 21 on either side are lowered.
The base 3 is made of cast iron and is formed by adopting a casting process. Low cost, high self weight and high stability.
In summary, the invention provides a hydraulic support for a top coal caving end, which is characterized in that a main hydraulic cylinder is arranged below a main supporting plate; two sides of the main supporting plate are respectively and rotatably connected with a supporting plate at one side; the side supporting plate is connected with a side hydraulic cylinder for driving the side supporting plate to rotate; when the hydraulic support is used, the main hydraulic cylinder extends out, and the main support plate is lifted; then the side hydraulic cylinder extends out, and the side supporting plates at the two sides are lifted to form support.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A hydraulic support for a top coal caving end is characterized by comprising a main support plate (2), wherein a main hydraulic cylinder (1) is arranged below the main support plate (2); the main hydraulic cylinder (1) is fixed on the base (3); at least two main hydraulic cylinders (1); the main hydraulic cylinders (1) are uniformly arranged on the circumference of a virtual circle which takes the center of the main supporting plate (2) as the center of a circle;
two sides of the main supporting plate (2) are respectively and rotatably connected with a supporting plate (21) at one side; the side supporting plate (21) is connected with a side hydraulic cylinder (22) for driving the side supporting plate to rotate;
the telescopic part of the side hydraulic cylinder (22) is connected with a side supporting plate (21), and the fixed part is provided with a rotating seat (221); the rotating seat (221) is hinged and fixedly arranged on a side cylinder support (31) on the base (3).
2. The hydraulic prop for a caving coal head according to claim 1, characterized in that the side cylinder prop (31) has two mutually parallel convex structures, and the rotating seat (221) is sandwiched between the two convex structures; the two protruding structures are connected with the rotating seat (221) in a penetrating way through a pin shaft (32).
3. The hydraulic prop for a caving coal head according to claim 2, characterized in that the diameter of the pin (32) is not less than 30mm and is subjected to normalizing and surface nitriding treatment.
4. The caving coal end hydraulic support according to claim 1, characterized in that the number of the main hydraulic cylinders (1) is four, and each main hydraulic cylinder (1) is respectively arranged on four vertexes of an inscribed square of a virtual circle.
5. The caving coal end hydraulic support according to claim 1, wherein the number of the main hydraulic cylinders (1) is three, and the three main hydraulic cylinders (1) are respectively located at three vertexes of the same virtual triangle; the virtual triangle is an equilateral triangle and is inscribed in the virtual circle.
6. The caving coal end hydraulic support according to claim 1, wherein the number of the main hydraulic cylinders (1) is five, and each main hydraulic cylinder (1) is respectively arranged on five vertexes of an inscribed regular pentagon of the virtual circle.
7. The hydraulic support for the end of the caving coal as claimed in any one of claims 1 to 6, wherein the bottom of the side supporting plate (21) is further provided with an auxiliary block hydraulic cylinder (24); the auxiliary block hydraulic cylinder (24) is connected with the auxiliary supporting block (23), and the end part of the auxiliary supporting block (23) is provided with a positioning head (231).
8. The hydraulic caving coal head support as claimed in claim 7, wherein said positioning head (231) is conical in shape.
9. The hydraulic prop according to claim 8, characterized in that the positioning head (231) is made of high-alloy steel and is subjected to quenching and tempering and surface nitriding.
10. The hydraulic support for the end of the caving coal as claimed in claim 7, wherein the side support plate (21) is made of channel steel and has a two-flanged structure; and the auxiliary block hydraulic cylinder (24) is arranged between the two flanging structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169200.5A CN111472826A (en) | 2020-03-12 | 2020-03-12 | Hydraulic prop for caving coal end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169200.5A CN111472826A (en) | 2020-03-12 | 2020-03-12 | Hydraulic prop for caving coal end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111472826A true CN111472826A (en) | 2020-07-31 |
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ID=71747410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010169200.5A Pending CN111472826A (en) | 2020-03-12 | 2020-03-12 | Hydraulic prop for caving coal end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111472826A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95107618A (en) * | 1995-05-12 | 1997-04-27 | Акционерное общество открытого типа "Подмосковный научно-исследовательский и проектно-конструкторский угольный институт" | Device for transfer displacement and holding of base of powered support unit |
| CN1702300A (en) * | 2005-05-26 | 2005-11-30 | 郑州煤炭工业(集团)有限责任公司 | Arrangement for quickly shifting sublevel caving hydraulic support series for fully-mechanized mining of three-soft coal bed |
| CN200952403Y (en) * | 2006-09-11 | 2007-09-26 | 天地科技股份有限公司 | Coal mine working face crossheading leading supporting hydraulic prop |
| CN201090230Y (en) * | 2007-07-11 | 2008-07-23 | 李秋生 | Fission top beam flexible support |
| CN101338684A (en) * | 2008-08-20 | 2009-01-07 | 天地科技股份有限公司 | Combined guided slipping type forepoling hydraulic support |
| CN201902223U (en) * | 2011-03-29 | 2011-07-20 | 高九华 | Hydraulic swing link type top caving coal hydraulic support |
| AU2011264182C1 (en) * | 2010-05-13 | 2015-05-28 | Tiefenbach Control Systems Gmbh | Control device for an extracting unit in the work face of a mine |
| CN104675421A (en) * | 2013-11-29 | 2015-06-03 | 华亭煤业集团有限责任公司 | Multifunctional hydraulic support equipment |
| CN205349395U (en) * | 2015-12-15 | 2016-06-29 | 王波 | Colliery hydraulic support |
-
2020
- 2020-03-12 CN CN202010169200.5A patent/CN111472826A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU95107618A (en) * | 1995-05-12 | 1997-04-27 | Акционерное общество открытого типа "Подмосковный научно-исследовательский и проектно-конструкторский угольный институт" | Device for transfer displacement and holding of base of powered support unit |
| CN1702300A (en) * | 2005-05-26 | 2005-11-30 | 郑州煤炭工业(集团)有限责任公司 | Arrangement for quickly shifting sublevel caving hydraulic support series for fully-mechanized mining of three-soft coal bed |
| CN200952403Y (en) * | 2006-09-11 | 2007-09-26 | 天地科技股份有限公司 | Coal mine working face crossheading leading supporting hydraulic prop |
| CN201090230Y (en) * | 2007-07-11 | 2008-07-23 | 李秋生 | Fission top beam flexible support |
| CN101338684A (en) * | 2008-08-20 | 2009-01-07 | 天地科技股份有限公司 | Combined guided slipping type forepoling hydraulic support |
| AU2011264182C1 (en) * | 2010-05-13 | 2015-05-28 | Tiefenbach Control Systems Gmbh | Control device for an extracting unit in the work face of a mine |
| CN201902223U (en) * | 2011-03-29 | 2011-07-20 | 高九华 | Hydraulic swing link type top caving coal hydraulic support |
| CN104675421A (en) * | 2013-11-29 | 2015-06-03 | 华亭煤业集团有限责任公司 | Multifunctional hydraulic support equipment |
| CN205349395U (en) * | 2015-12-15 | 2016-06-29 | 王波 | Colliery hydraulic support |
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Application publication date: 20200731 |
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