CN211524871U - Mining variable cross-section air duct structure - Google Patents
Mining variable cross-section air duct structure Download PDFInfo
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- CN211524871U CN211524871U CN201921926272.9U CN201921926272U CN211524871U CN 211524871 U CN211524871 U CN 211524871U CN 201921926272 U CN201921926272 U CN 201921926272U CN 211524871 U CN211524871 U CN 211524871U
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Abstract
The utility model relates to a mining variable cross-section air duct structure, which belongs to the technical field of coal mine ventilation, and particularly comprises a large-caliber concrete air duct and a small-caliber concrete air duct which are connected through a variable cross-section air duct, the outer surface of the air duct is provided with a plurality of bar planting holes, first vertical bars are all inserted in the bar planting holes, a first annular bar mesh is arranged outside the large-caliber concrete air duct, a second annular bar mesh is arranged outside the small-caliber concrete air duct, a plurality of internal thread pipes are fixed on the circumference of the outer wall of the variable cross-section air duct, second vertical bars are installed in the internal thread pipes, a variable cross-section annular bar mesh is arranged outside the variable cross-section air duct, both ends of the variable cross-section annular bar mesh are respectively welded and fixed with the first annular bar mesh and the second annular bar mesh, concrete layers are sprayed on the outer parts of the large-caliber concrete air duct, the small, the utility model discloses simple structure, construction convenience, construction cycle is short, construction safe and reliable.
Description
Technical Field
The utility model relates to a mining variable cross-section wind channel structure belongs to colliery ventilation technical field.
Background
At present, along with the continuous operation of the concurrent recombination and integration work of coal mine enterprises, a batch of mines need to be reformed by a production system after being integrated and serve as air channels in a ground ventilation system, and because the original air channel section can not meet the parameter requirement of a new fan, the original air channel needs to be reformed by reducing the variable cross section.
In the process of carrying out variable cross-section reduction transformation on an original air duct, the conventional transformation technical scheme is that an air duct section needing variable cross-section reduction is integrally dismantled, and a reinforced concrete variable cross-section air duct is poured again. The conventional reconstruction technical scheme has the disadvantages of high construction cost, complex template manufacturing and long construction period, and the maintenance time of a new reinforced concrete air duct needs to be considered, so that the requirement of the construction period of environmental protection reconstruction is difficult to meet.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that prior art exists, the utility model provides a simple structure, construction convenience, construction cycle is short, construction safe and reliable's mining variable cross section wind channel structure.
In order to achieve the purpose, the technical scheme adopted by the utility model is a mining variable cross-section air duct structure, which comprises a large-caliber concrete air duct and a small-caliber concrete air duct, wherein the large-caliber concrete air duct and the small-caliber concrete air duct are connected through a variable cross-section air duct, the outer surfaces of the large-caliber concrete air duct and the small-caliber concrete air duct are respectively provided with a plurality of bar planting holes, first vertical bars are respectively inserted in the bar planting holes, a first annular reinforcing mesh is arranged outside the large-caliber concrete air duct, a second annular reinforcing mesh is arranged outside the small-caliber concrete air duct, the first annular reinforcing mesh is fixed on the first vertical bars of the large-caliber concrete air duct, the second annular reinforcing mesh is fixed on the first vertical bars of the small-caliber concrete air duct, and a plurality of internal thread pipes are fixed on the circumference of the outer wall of the variable cross-section air duct, the novel variable cross-section air pipe is characterized in that a second vertical rib is installed in the internal thread pipe, a connecting line between vertexes of the second vertical rib is parallel to the outer wall of the variable cross-section air pipe, a variable cross-section annular reinforcing mesh is arranged outside the variable cross-section air pipe, the taper of the variable cross-section annular reinforcing mesh is the same as that of the variable cross-section air pipe, the variable cross-section annular reinforcing mesh is fixed on the second vertical rib, two ends of the variable cross-section annular reinforcing mesh are fixedly welded with the first annular reinforcing mesh and the second annular reinforcing mesh respectively, concrete layers are sprayed on the outer portions of the large-caliber concrete air duct, the small-caliber concrete air duct and the variable cross-section air pipe, and the spraying thickness of the concrete layers is higher than the heights of.
Preferably, the variable cross-section air pipe is of a steel structure, annular outer edge plates are arranged at two ends of the variable cross-section air pipe respectively, a plurality of expansion bolts are arranged on the end faces of the large-caliber concrete air duct and the small-caliber concrete air duct respectively, and the annular outer edge plates are fixed on the expansion bolts.
Preferably, the bar planting holes are arranged in a quincunx shape, and modified epoxy adhesives are filled in the bar planting holes.
Preferably, the number of the second annular reinforcing mesh, the second annular reinforcing mesh and the variable cross-section annular reinforcing mesh is 2-3 layers.
Compared with the prior art, the utility model discloses following technological effect has: the utility model discloses simple structure, construction convenience adopts the concrete wind channel that is different with the bore to connect through the variable cross section tuber pipe, then pours the reinforced concrete layer in concrete wind channel outside, forms new variable cross section tuber pipe, and convenient operation is simple, and the operating expenses is few, and the time limit for a project is short, can save the complicated process of on-the-spot preparation template, reduces environmental pollution, and energy-conserving material saving satisfies the tight construction requirement of transformation engineering. Additionally, the utility model discloses to the downthehole injection modified epoxy type adhesive of bar planting, make the concrete of injection and original concrete wind channel reliably combine through vertical muscle and reinforcing bar net piece, avoid appearing the crack, optimized the wind channel shape, satisfy the requirement of transforming the high-efficient operation of back fan equipment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in figure 1, the mining variable cross-section air duct structure comprises a large-caliber concrete air duct 1 and a small-caliber concrete air duct 2, wherein the large-caliber concrete air duct 1 is connected with the small-caliber concrete air duct 2 through a variable cross-section air duct 3, a plurality of bar planting holes 4 are formed in the outer surfaces of the large-caliber concrete air duct 1 and the small-caliber concrete air duct 2, first vertical bars 5 are inserted into the bar planting holes 4, a first annular reinforcing mesh 6 is arranged outside the large-caliber concrete air duct 1, a second annular reinforcing mesh 7 is arranged outside the small-caliber concrete air duct 2, the first annular reinforcing mesh 6 is fixed on the first vertical bars of the large-caliber concrete air duct 1, the second annular reinforcing mesh 7 is fixed on the first vertical bars of the small-caliber concrete air duct 2, a plurality of internal thread pipes 8 are fixed on the circumference of the outer wall of the variable cross-section air duct 3, and second vertical bars 9 are installed in the internal thread pipes 8, the connecting line between the vertexes of the second vertical ribs 9 is parallel to the outer wall of the variable cross-section air pipe 3, a variable cross-section annular reinforcing mesh 10 is arranged outside the variable cross-section air pipe 3, the taper of the variable cross-section annular reinforcing mesh 10 is the same as that of the variable cross-section air pipe 3, the variable cross-section annular reinforcing mesh 10 is fixed on the second vertical ribs, two ends of the variable cross-section annular reinforcing mesh 10 are fixedly welded with the first annular reinforcing mesh 6 and the second annular reinforcing mesh 7 respectively, the large-caliber concrete air duct 1, the small-caliber concrete air duct 2 and the variable cross-section air pipe 3 are sprayed with a concrete layer 11, and the spraying thickness of the concrete layer 11 is higher than the heights of the first vertical ribs and the second vertical ribs.
Wherein, variable cross section tuber pipe 3 is the steel structure, and the both ends of variable cross section tuber pipe 3 are provided with annular outer fringe board 12 respectively, installs a plurality of expansion bolts 13 on the terminal surface in heavy-calibre concrete wind channel 1 and the small-bore concrete wind channel 2 respectively, and annular outer fringe board 12 is fixed on expansion bolts 13.
The utility model discloses a connect the concrete wind channel of two different bores, form new variable cross-section concrete wind channel. When the concrete air duct is connected, firstly, expansion bolts are installed on the connecting end face of the concrete air duct, and the positions of the expansion bolts are required to be avoided from the positions of the reinforcing steel bars. Then, two ends of the variable cross-section air pipe 3 are respectively installed on the expansion bolts, and inner rings of end faces of two ends of the variable cross-section air pipe 3 are kept flush with the inner wall of the concrete air duct. And (3) arranging rib planting holes on the concrete air ducts, welding internal threaded pipes on the outer surfaces of the variable cross-section air pipes, then installing first vertical ribs and second vertical ribs, then erecting the two air duct pipes, and welding a first annular reinforcing mesh, a second annular reinforcing mesh and a variable cross-section annular reinforcing mesh. The number of the second annular reinforcing mesh 6, the second annular reinforcing mesh 7 and the variable cross-section annular reinforcing mesh 10 is 2-3, then a concrete layer is sprayed on the reinforcing mesh until the concrete layer covers the reinforcing mesh, and then the concrete layer is leveled and covered by water for maintenance.
During construction, special attention needs to be paid to that the steel bar mesh is laid and changes along with the outer wall of the wind channel, and the steel bar mesh is kept smooth; spot welding the nodes of the reinforcing mesh sheets, wherein the lap joint width of the connecting edge of the reinforcing mesh sheets is not less than 10 cm; when the concrete is sprayed, a mark for controlling the spraying thickness is required to be set, the concrete is sprayed in a segmented mode, the concrete is divided into sections from bottom to top, the concrete is firstly concave and then convex, the operation is carried out, and the concrete cannot be leaked to be sprayed.
In addition, the bar planting holes 4 are arranged in a quincunx shape, and the modified epoxy adhesive 14 is filled in the bar planting holes. Modified epoxy adhesive is injected into the bar planting holes, sprayed concrete is reliably combined with an original concrete air channel through vertical bars and reinforcing mesh sheets, cracks are avoided, the shape of the air channel is optimized, and the requirement of high-efficiency operation of improved fan equipment is met
The foregoing is considered as illustrative and not restrictive of the preferred embodiments of the invention, and any modifications, equivalents and improvements made within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The utility model provides a mining variable cross section wind channel structure, includes heavy-calibre concrete wind channel and small-bore concrete wind channel, its characterized in that: the large-caliber concrete air duct and the small-caliber concrete air duct are connected through variable-section air pipes, a plurality of bar planting holes are formed in the outer surfaces of the large-caliber concrete air duct and the small-caliber concrete air duct, first vertical bars are inserted into the bar planting holes, a first annular reinforcing mesh is arranged outside the large-caliber concrete air duct, a second annular reinforcing mesh is arranged outside the small-caliber concrete air duct, the first annular reinforcing mesh is fixed on the first vertical bars of the large-caliber concrete air duct, the second annular reinforcing mesh is fixed on the first vertical bars of the small-caliber concrete air duct, a plurality of internal threaded pipes are fixed on the circumference of the outer wall of the variable-section air pipe, second vertical bars are installed in the internal threaded pipes, connecting lines between the peaks of the second vertical bars are parallel to the outer wall of the variable-section air duct, and a variable-section annular reinforcing mesh is arranged outside the variable-section air duct, the variable cross-section annular reinforcing mesh is fixed on the second vertical rib, two ends of the variable cross-section annular reinforcing mesh are welded and fixed with the first annular reinforcing mesh and the second annular reinforcing mesh respectively, concrete layers are sprayed on the large-caliber concrete air duct, the small-caliber concrete air duct and the variable cross-section air duct, and the spraying thickness of the concrete layers is higher than the heights of the first vertical rib and the second vertical rib.
2. The mining variable cross-section air duct structure according to claim 1, characterized in that: the variable cross-section air pipe is of a steel structure, annular outer edge plates are arranged at two ends of the variable cross-section air pipe respectively, a plurality of expansion bolts are arranged on the end faces of the large-caliber concrete air duct and the small-caliber concrete air duct respectively, and the annular outer edge plates are fixed on the expansion bolts.
3. The mining variable cross-section air duct structure according to claim 1, characterized in that: the bar planting holes are arranged in a quincunx shape, and modified epoxy adhesives are filled in the bar planting holes.
4. The mining variable cross-section air duct structure according to claim 1, characterized in that: the number of the second annular reinforcing mesh, the second annular reinforcing mesh and the variable cross-section annular reinforcing mesh is 2-3 layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926272.9U CN211524871U (en) | 2019-11-11 | 2019-11-11 | Mining variable cross-section air duct structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921926272.9U CN211524871U (en) | 2019-11-11 | 2019-11-11 | Mining variable cross-section air duct structure |
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| Publication Number | Publication Date |
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| CN211524871U true CN211524871U (en) | 2020-09-18 |
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| CN201921926272.9U Active CN211524871U (en) | 2019-11-11 | 2019-11-11 | Mining variable cross-section air duct structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944057A (en) * | 2021-02-03 | 2021-06-11 | 江西龙正科技发展有限公司 | Novel super-strength RPC air duct pipe |
-
2019
- 2019-11-11 CN CN201921926272.9U patent/CN211524871U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944057A (en) * | 2021-02-03 | 2021-06-11 | 江西龙正科技发展有限公司 | Novel super-strength RPC air duct pipe |
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