CN203808965U - Blasting cartridge used for underground coal mine fracturing - Google Patents
Blasting cartridge used for underground coal mine fracturing Download PDFInfo
- Publication number
- CN203808965U CN203808965U CN201420192438.XU CN201420192438U CN203808965U CN 203808965 U CN203808965 U CN 203808965U CN 201420192438 U CN201420192438 U CN 201420192438U CN 203808965 U CN203808965 U CN 203808965U
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- CN
- China
- Prior art keywords
- explosive cartridge
- sealing
- box cupling
- filler
- coal mine
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- Expired - Fee Related
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Abstract
The utility model belongs to the technical field of coal mine gas extraction, and relates to a blasting cartridge used for underground coal mine fracturing. The blasting cartridge is composed of blasting cartridge short sections, bidirectional compressing connecting hoops, an igniting sheet assembly, a unidirectional compressing connecting hoop and a sealing cover assembly, and is characterized in that the components are located on the same axis, the blasting cartridge short sections are sequentially connected through the bidirectional compressing connecting hoops, the sealing cover assembly is located at one end of the blasting cartridge and connected with the blasting cartridge short sections through the unidirectional compressing connecting hoop, and the igniting sheet assembly is located at the other end of the blasting cartridge and connected with the unidirectional compressing connecting hoop through screw threads. The blasting cartridge can be rapidly assembled and is free of misfiring, capable of being repeatedly used, low in cost, free of pollution and environmentally friendly.
Description
Technical field
The utility model belongs to coal mine gas drainage technical field, more specifically to a kind of explosive cartridge for coal mine underground fracturing.
Background technology
Drilling-draining method is the important means that current China's coal-mine solves Gas Outburst, and its concrete construction method is first on coal face, to arrange the gas pumping hole of some, then implements gas pumping.But along with the increase of the coal mining degree of depth, coal measure strata gas permeability is poor also worse and worse, the extinction measure of current routine often efficiency is not high, and the area of the gas of extraction is limited, has wasted a large amount of man power and materials.
Under coal mine, hydraulic fracturing technology is as coal mine gas control measures, be widely used in the local gas control measures of domestic Gas Outburst mine, but in work progress, exist sealing of hole difficulty, gas pumping hole easily to cave in and hole in apparatus for work be difficult to fixing problem.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of simple in structure, safely and effectively for the explosive cartridge of coal mine underground fracturing.
The utility model solves the technical scheme that its technical problem adopts: a kind of explosive cartridge for coal mine underground fracturing, by explosive cartridge pipe nipple 1, Bidirectional compacting box cupling 2, igniting piece assembly 3, one-way compression box cupling 4 and seal cover assembly 5 form, it is characterized in that, described explosive cartridge is short by 1, Bidirectional compacting box cupling 2, igniting piece assembly 3, one-way compression box cupling 4 and seal cover assembly 5 are on same axis, explosive cartridge pipe nipple 1 uses Bidirectional compacting box cupling 2 to connect successively, seal cover assembly 5 is positioned at one end of explosive cartridge, be connected with explosive cartridge pipe nipple 1 by one-way compression box cupling 4, igniting piece assembly 3 is positioned at the explosive cartridge other end, be connected with one-way compression box cupling 4 by screw thread.
Described explosive cartridge pipe nipple 1 is made up of seamless steel pipe 1A, rubber stopper 1B and sebific duct 1C, sebific duct 1C is positioned at seamless steel pipe 1A, rubber stopper 1B is enclosed within seamless steel pipe 1A outside, between rubber stopper 1B and seamless steel pipe 1A, there is annular space, sebific duct 1C is provided with a bypass pipe with screw thread and nut, at a hollow section with screw thread of seamless steel pipe 1A inner tubal wall place welding, sebific duct 1C links together bypass pipe and hollow section by nut, and hollow section is communicated with the annular space between seamless steel pipe 1A and rubber stopper 1B.
Described Bidirectional compacting box cupling 2 is a box cupling with two box 2A, and two box 2A outside is provided with pressure cap 2B.
Described igniting piece assembly 3 comprises friction top 3A, igniting piece 3B and sealing mat 3C, and friction top 3A is a hollow cap with screw thread, across sealing mat 3C, igniting piece 3B is fixed on one-way compression box cupling 4 by screwed connection.
Described one-way compression box cupling 4 is a box cupling with box 4A, and box 4A outside is provided with pressure cap 4B.
Described seal cover assembly 5 is made up of seal cover 5A, the fixing filler sealing device 5B of sealing and operation filler sealing device 5C, seal cover assembly 5 is convex structure, projection outside is provided with screw thread 5A-1, be provided with in the horizontal direction operation filler 5A-3 and the fixing filler 5A-2 of sealing of pair of parallel, the fixing filler 5A-2 of operation filler 5A-3 and sealing inner side is provided with box, and the fixing filler sealing device 5B of operation filler sealing device 5C and sealing lays respectively in operation filler 5A-3 and the fixing filler 5A-2 of sealing.
The fixing filler sealing device 5B of described sealing is made up of high-pressure water inlet pipeline 5B-1, elastic seal ring 5B-2, hold-down ring 5B-3 and pressed end 5B-4, it is upper that elastic seal ring 5B-2, hold-down ring 5B-3 and pressed end 5B-4 are enclosed within high-pressure water inlet pipeline 5B-1 successively, is connected with the box on the fixing filler 5A-2 of sealing by pressed end 5B-4.
The beneficial effects of the utility model are: explosive cartridge is rapid-assembling at the scene, and each gas pumping hole all can realize explosion, have without miso-fire, operating feature efficiently; Annular space between energy effective sealing explosive cartridge and gas pumping hole, fixing pressure break explosive cartridge, prevents that gas pumping hole from caving in, thereby has ensured pressing crack construction effect, improves the disappointing area in gas pumping hole; Explosive cartridge is reusable, with low cost; Bursting work can not pollute colliery, environmental protection.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Brief description of the drawings
Fig. 1 is the structural representation of the explosive cartridge that the utility model proposes;
Fig. 2 is the structural representation of Fig. 1 borehole blasting cylinder pipe nipple;
Fig. 3 is the structural representation of Bidirectional compacting box cupling in Fig. 1;
Fig. 4 is the structural representation of igniting piece assembly in Fig. 1;
Fig. 5 is the structural representation of one-way compression box cupling in Fig. 1;
Fig. 6 is the structural representation of seal cover assembly in Fig. 5;
Fig. 7 is the structural representation of the fixing filler sealing device of sealing in Fig. 6.
In figure: 1, explosive cartridge pipe nipple, 2, Bidirectional compacting box cupling, 3, igniting piece assembly, 4, one-way compression box cupling, 5, seal cover assembly, 1A, seamless steel pipe, 1B, rubber stopper, 1C, sebific duct, 2A, two boxes, 2B, pressure cap, 3A, friction top, 3B, igniting piece, 3C, sealing mat, 4A, box, 4B, pressure cap, 5A, seal cover, 5B, the fixing filler sealing device of sealing, 5C, operation filler sealing device, 5A-1, screw thread, 5A-2, the fixing filler of sealing, 5A-3, operation filler, 5B-1, high-pressure water inlet pipeline, 5B-2, elastic seal ring, 5B-3, hold-down ring, 5B-4, pressed end.
Detailed description of the invention
Referring to accompanying drawing 1-7, a kind of explosive cartridge for coal mine underground fracturing the utility model proposes, by explosive cartridge pipe nipple 1, Bidirectional compacting box cupling 2, igniting piece assembly 3, one-way compression box cupling 4 and seal cover assembly 5 form, it is characterized in that, described explosive cartridge is short, 1, Bidirectional compacting box cupling 2, igniting piece assembly 3, one-way compression box cupling 4 and seal cover assembly 5 are on same axis, explosive cartridge pipe nipple 1 uses Bidirectional compacting box cupling 2 to connect successively, seal cover assembly 5 is positioned at one end of explosive cartridge, be connected with explosive cartridge pipe nipple 1 by one-way compression box cupling 4, igniting piece assembly 3 is positioned at the explosive cartridge other end, be connected with one-way compression box cupling 4 by screw thread.
Described explosive cartridge pipe nipple 1 is made up of seamless steel pipe 1A, rubber stopper 1B and sebific duct 1C, sebific duct 1C is positioned at seamless steel pipe 1A, rubber stopper 1B is enclosed within seamless steel pipe 1A outside, between rubber stopper 1B and seamless steel pipe 1A, there is annular space, sebific duct 1C is provided with a bypass pipe with screw thread and nut, at a hollow section with screw thread of seamless steel pipe 1A inner tubal wall place welding, sebific duct 1C links together bypass pipe and hollow section by nut, and hollow section is communicated with the annular space between seamless steel pipe 1A and rubber stopper 1B.
Described Bidirectional compacting box cupling 2 is a box cupling with two box 2A, two box 2A outside is provided with pressure cap 2B, pressure cap 2B compresses rubber stopper 1B while connection with explosive cartridge pipe nipple 1 for Bidirectional compacting box cupling 2, to reach the object of annular space between sealing rubber plug 1B and seamless steel pipe 1A.
Described igniting piece assembly 3 comprises friction top 3A, igniting piece 3B and sealing mat 3C, friction top 3A is a hollow cap with screw thread, across sealing mat 3C, igniting piece 3B is fixed on by screwed connection on one-way compression box cupling 4, igniting piece 3B is crystal type elastomeric material, for example neoprene, plays sealing explosive cartridge one end.
Described one-way compression box cupling 4 is a box cupling with box 4A, box 4A outside is provided with pressure cap 4B, described pressure cap 4B compresses rubber stopper 1B while connection with explosive cartridge pipe nipple 1 for one-way compression box cupling 4, to reach the object of annular space between sealing rubber plug 1B and seamless steel pipe 1A.
Described seal cover assembly 5 is made up of seal cover 5A, the fixing filler sealing device 5B of sealing and operation filler sealing device 5C, seal cover assembly 5 is convex structure, projection outside is provided with screw thread 5A-1, be provided with in the horizontal direction operation filler 5A-3 and the fixing filler 5A-2 of sealing of pair of parallel, the fixing filler 5A-2 of operation filler 5A-3 and sealing inner side is provided with box, and the fixing filler sealing device 5B of operation filler sealing device 5C and sealing lays respectively in operation filler 5A-3 and the fixing filler 5A-2 of sealing.
The fixing filler sealing device 5B of described sealing is made up of high-pressure water inlet pipeline 5B-1, elastic seal ring 5B-2, hold-down ring 5B-3 and pressed end 5B-4, it is upper that elastic seal ring 5B-2, hold-down ring 5B-3 and pressed end 5B-4 are enclosed within high-pressure water inlet pipeline 5B-1 successively, is connected with the box on the fixing filler 5A-2 of sealing by pressed end 5B-4.
The structure of the fixing filler sealing device 5B of described operation filler sealing device 5C and above-mentioned sealing is identical, be corresponding pipeline be operations involving high pressure pipeline.
Described operations involving high pressure pipeline is to pump into of the fracturing fluid pipeline during fracturing work, and described high-pressure water inlet pipeline is the pipeline that pumps into the annular space between seamless steel pipe and rubber stopper during fracturing work.
The sealing principle of the fixing filler sealing device 5B of sealing: first elastic seal ring 5B-2, hold-down ring 5B-3 and pressed end 5B-4 are enclosed within to high-pressure water inlet pipeline 5B-1 successively, then high-pressure water inlet pipeline 5B-1 is inserted to the fixing filler 5A-2 of sealing, finally be connected with the box of the fixing filler 5A-2 of sealing inner side by pressed end 5B-4, reach the effect of extruding elastic seal ring 5B-2 with sealed high pressure back with water inlet line 5B-1.The sealing principle of operation filler sealing device 5C is identical therewith.
Operating principle: explosive cartridge is lowered to after design hole depth, first operations involving high pressure pipeline and high-pressure water inlet pipeline 5B-1 connect with operation filler 5A-3 and the fixing filler 5A-2 of sealing respectively, then utilize water pump by water successively by entering the outer annular space of explosive cartridge pipe nipple 1 after high-pressure water inlet pipeline 5B-1, sebific duct 1C, bypass pipe and hollow section, thereby rubber stopper 1B is propped up to the hole wall of being close to gas pumping hole, finally carry out construction operation by operations involving high pressure pipeline to pumping into fracturing fluid in explosive cartridge.
Claims (7)
1. the explosive cartridge for coal mine underground fracturing, by explosive cartridge pipe nipple (1), Bidirectional compacting box cupling (2), igniting piece assembly (3), one-way compression box cupling (4) and seal cover assembly (5) composition, it is characterized in that, described explosive cartridge short (1), Bidirectional compacting box cupling (2), igniting piece assembly (3), one-way compression box cupling (4) and seal cover assembly (5) are on same axis, explosive cartridge pipe nipple (1) uses Bidirectional compacting box cupling (2) to connect successively, seal cover assembly (5) is positioned at one end of explosive cartridge, be connected with explosive cartridge pipe nipple (1) by one-way compression box cupling (4), igniting piece assembly (3) is positioned at the explosive cartridge other end, be connected with one-way compression box cupling (4) by screw thread.
2. a kind of explosive cartridge for coal mine underground fracturing according to claim 1, it is characterized in that, described explosive cartridge pipe nipple (1) is by seamless steel pipe (1A), rubber stopper (1B) and sebific duct (1C) composition, sebific duct (1C) is positioned at seamless steel pipe (1A), rubber stopper (1B) is enclosed within seamless steel pipe (1A) outside, between rubber stopper (1B) and seamless steel pipe (1A), there is annular space, sebific duct (1C) is provided with a bypass pipe with screw thread and nut, at a hollow section with screw thread of seamless steel pipe (1A) inner tubal wall place welding, sebific duct (1C) links together bypass pipe and hollow section by nut, hollow section is communicated with the annular space between seamless steel pipe (1A) and rubber stopper (1B).
3. a kind of explosive cartridge for coal mine underground fracturing according to claim 1, is characterized in that, described Bidirectional compacting box cupling (2) is a box cupling with two boxes (2A), and two boxes (2A) outside is provided with pressure cap (2B).
4. a kind of explosive cartridge for coal mine underground fracturing according to claim 1, it is characterized in that, described igniting piece assembly (3) comprises friction top (3A), igniting piece (3B) and sealing mat (3C), friction top (3A) is a hollow cap with screw thread, and across sealing mat, (3C0 is fixed on igniting piece (3B) on one-way compression box cupling (4) by screwed connection.
5. a kind of explosive cartridge for coal mine underground fracturing according to claim 1, is characterized in that, described one-way compression box cupling (4) is a box cupling with box (4A), and box (4A) outside is provided with pressure cap (4B).
6. a kind of explosive cartridge for coal mine underground fracturing according to claim 1, it is characterized in that, described seal cover assembly (5) is by seal cover (5A), the fixing filler sealing device (5B) of sealing and operation filler sealing device (5C) composition, seal cover assembly (5) is convex structure, projection outside is provided with screw thread (5A-1), be provided with in the horizontal direction operation filler (5A-3) and the fixing filler (5A-2) of sealing of pair of parallel, the fixing filler (5A-2) of operation filler (5A-3) and sealing inner side is provided with box, the fixing filler sealing device (5B) of operation filler sealing device (5C) and sealing lays respectively at operation filler (5A-3) and the fixing filler (5A-2) of sealing is inner.
7. according to a kind of explosive cartridge for coal mine underground fracturing described in claim 1 or 6, it is characterized in that, the fixing filler sealing device (5B) of described sealing is made up of high-pressure water inlet pipeline (5B-1), elastic seal ring (5B-2), hold-down ring (5B-3) and pressed end (5B-4), it is upper that elastic seal ring (5B-2), hold-down ring (5B-3) and pressed end (5B-4) are enclosed within high-pressure water inlet pipeline (5B-1) successively, is connected by the box on the fixing filler (5A-2) of pressed end (5B-4) and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192438.XU CN203808965U (en) | 2014-04-21 | 2014-04-21 | Blasting cartridge used for underground coal mine fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420192438.XU CN203808965U (en) | 2014-04-21 | 2014-04-21 | Blasting cartridge used for underground coal mine fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203808965U true CN203808965U (en) | 2014-09-03 |
Family
ID=51447738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420192438.XU Expired - Fee Related CN203808965U (en) | 2014-04-21 | 2014-04-21 | Blasting cartridge used for underground coal mine fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203808965U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328311A (en) * | 2017-07-09 | 2017-11-07 | 贵州大学 | A kind of explosive cartridge of new construction |
| CN109899049A (en) * | 2019-04-18 | 2019-06-18 | 重庆大学 | Reusable mining multistage waterpower sealing of hole fracturing device |
-
2014
- 2014-04-21 CN CN201420192438.XU patent/CN203808965U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328311A (en) * | 2017-07-09 | 2017-11-07 | 贵州大学 | A kind of explosive cartridge of new construction |
| CN109899049A (en) * | 2019-04-18 | 2019-06-18 | 重庆大学 | Reusable mining multistage waterpower sealing of hole fracturing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 |